Merge pull request #2801 from knorrium/use_fra_for_bisq

Handle ISP with no nodes

.github/FUNDING.yml

@@ -1,12 +0,0 @@
-# These are supported funding model platforms
-
-github: ['mempool'] # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
-patreon: # Replace with a single Patreon username
-open_collective: # Replace with a single Open Collective username
-ko_fi: # Replace with a single Ko-fi username
-tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
-community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
-liberapay: # Replace with a single Liberapay username
-issuehunt: # Replace with a single IssueHunt username
-otechie: # Replace with a single Otechie username
-custom: ['https://mempool.space/sponsor'] # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

.github/ISSUE_TEMPLATE/00-bug-issue.md

@@ -1,14 +1,13 @@
 ---
 name: 🐛 Bug Report
-about: Report bugs or other issues to us on GitHub
+about: Report bugs (no support requests, please)
 ---
 
 <!--
    SUPPORT REQUESTS:
    This is for reporting bugs in Mempool, not for support requests. 
-   If you have a support request, please join our Keybase or Matrix:
-   https://keybase.io/team/mempool
-   https://matrix.to/#/#mempool:bitcoin.kyoto
+   If you have a support request, please reach out on Matrix:
+   https://matrix.to/#/#mempool.support:bitcoin.kyoto
 -->
 
 ### Description

.github/ISSUE_TEMPLATE/30-feature-request.md

@@ -1,14 +1,13 @@
 ---
 name: ✨ Feature Request
-about: Request a feature or suggest other enhancements 💡
+about: Request a feature or suggest other enhancements
 ---
 
 <!--
    SUPPORT REQUESTS:
    This is for requesting features in Mempool, not for support requests. 
-   If you have a support request, please join our Keybase or Matrix:
-   https://keybase.io/team/mempool
-   https://matrix.to/#/#mempool:bitcoin.kyoto
+   If you have a support request, please reach out on Matrix:
+   https://matrix.to/#/#mempool.support:bitcoin.kyoto
 -->
 
 ### Description

.github/ISSUE_TEMPLATE/config.yml

@@ -1,8 +1,8 @@
 blank_issues_enabled: false
 contact_links:
-  - name: 💬 Need help? Chat with us on Matrix
-    url: https://matrix.to/#/#mempool:bitcoin.kyoto
-    about: For support requests or general questions
-  - name: 💬 Need help? Chat with us on Keybase
-    url: https://keybase.io/team/mempool
+  - name: 🙋 Need help? Chat with us on Matrix
+    url: https://matrix.to/#/#mempool.support:bitcoin.kyoto
     about: For support requests or general questions
+  - name: 🌐 Want to help with translations? Use Transifex
+    url: https://www.transifex.com/mempool/mempool
+    about: All translations work is done on Transifex

.github/dependabot.yml

@@ -0,0 +1,28 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: "/backend"
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10
+    ignore:
+      - update-types: ["version-update:semver-major"]
+  - package-ecosystem: npm
+    directory: "/frontend"
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10
+    ignore:
+      - update-types: ["version-update:semver-major"]
+  - package-ecosystem: docker
+    directory: "/docker/backend"
+    schedule:
+      interval: daily
+    ignore:
+      - update-types: ["version-update:semver-major"]
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: daily
+    ignore:
+      - update-types: ["version-update:semver-major"]

.github/pull_request_template.md

@@ -0,0 +1,6 @@
+<!--
+Please do not open pull requests for translations.
+
+All translations work is done on Transifex:
+https://www.transifex.com/mempool/mempool
+-->

.github/workflows/ci.yml

@@ -0,0 +1,96 @@
+name: CI Pipeline for the Backend and Frontend
+
+on:
+  pull_request:
+    types: [opened, review_requested, synchronize]
+
+jobs:
+  backend:
+    if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
+    strategy:
+      matrix:
+        node: ["16.16.0", "18.5.0"]
+        flavor: ["dev", "prod"]
+      fail-fast: false
+    runs-on: "ubuntu-latest"
+
+    name: Backend (${{ matrix.flavor }}) - node ${{ matrix.node }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: ${{ matrix.node }}/${{ matrix.flavor }}
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node }}
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install
+        if: ${{ matrix.flavor == 'dev'}}
+        run: npm ci
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/backend
+
+      - name: Install (Prod dependencies only)
+        if: ${{ matrix.flavor == 'prod'}}
+        run: npm ci --omit=dev --omit=optional
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/backend
+
+      - name: Lint
+        if: ${{ matrix.flavor == 'dev'}}
+        run: npm run lint
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/backend
+
+      - name: Unit Tests
+        if: ${{ matrix.flavor == 'dev'}}
+        run: npm run test
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/backend
+
+      - name: Build
+        run: npm run build
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/backend
+
+  frontend:
+    if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
+    strategy:
+      matrix:
+        node: ["16.15.0", "18.5.0"]
+        flavor: ["dev", "prod"]
+      fail-fast: false
+    runs-on: "ubuntu-latest"
+
+    name: Frontend (${{ matrix.flavor }}) - node ${{ matrix.node }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: ${{ matrix.node }}/${{ matrix.flavor }}
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node }}
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install (Prod dependencies only)
+        run: npm ci --omit=dev --omit=optional
+        if: ${{ matrix.flavor == 'prod'}}
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/frontend
+
+      - name: Install
+        if: ${{ matrix.flavor == 'dev'}}
+        run: npm ci
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/frontend
+
+      - name: Lint
+        if: ${{ matrix.flavor == 'dev'}}
+        run: npm run lint
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/frontend
+
+      # - name: Test
+      #   run: npm run test
+
+      - name: Build
+        run: npm run build
+        working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/frontend

.github/workflows/cypress.yml

@@ -1,80 +1,61 @@
 name: Cypress Tests
 
-on: [push, pull_request]
-
+on:
+  pull_request:
+    types: [ opened, review_requested, synchronize ]
 jobs:
   cypress:
-    runs-on: ${{ matrix.os }}
+    if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
+    runs-on: "ubuntu-latest"
     strategy:
       fail-fast: false
       matrix:
-        containers: [1, 2, 3, 4, 5]
-        os: ["ubuntu-latest"]
-        browser: [chrome]
-    name: E2E tests on ${{ matrix.browser }} - ${{ matrix.os }}
+        module: ["mempool", "liquid", "bisq"]
+        include:
+          - module: "mempool"
+            spec: |
+              cypress/e2e/mainnet/*.spec.ts
+              cypress/e2e/signet/*.spec.ts
+              cypress/e2e/testnet/*.spec.ts
+          - module: "liquid"
+            spec: |
+              cypress/e2e/liquid/liquid.spec.ts
+              cypress/e2e/liquidtestnet/liquidtestnet.spec.ts
+          - module: "bisq"
+            spec: |
+              cypress/e2e/bisq/bisq.spec.ts
+          
+    name: E2E tests for ${{ matrix.module }}
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+        with:
+          path: ${{ matrix.module }}
+          
       - name: Setup node
         uses: actions/setup-node@v2
         with:
-          node-version: 16.10.0
+          node-version: 16.15.0
           cache: 'npm'
-          cache-dependency-path: frontend/package-lock.json
-      - name: ${{ matrix.browser }} browser tests (Mempool)
-        uses: cypress-io/github-action@v2
-        with:
-          working-directory: frontend
-          build: npm run config:defaults:mempool
-          start: npm run start:local-prod
-          wait-on: 'http://localhost:4200'
-          wait-on-timeout: 120
-          record: true
-          parallel: true
-          group: Tests on ${{ matrix.browser }} (Mempool)
-          browser: ${{ matrix.browser }}
-          ci-build-id: '${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}'
-        env:
-          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          CYPRESS_PROJECT_ID: ${{ secrets.CYPRESS_PROJECT_ID }}
+          cache-dependency-path: ${{ matrix.module }}/frontend/package-lock.json
 
-      - name: ${{ matrix.browser }} browser tests (Liquid)
-        uses: cypress-io/github-action@v2
-        if: always()
+      - name: Chrome browser tests (${{ matrix.module }})
+        uses: cypress-io/github-action@v4
         with:
-          working-directory: frontend
-          build: npm run config:defaults:liquid
-          start: npm run start:local-prod
+          tag: ${{ github.event_name }}
+          working-directory: ${{ matrix.module }}/frontend
+          build: npm run config:defaults:${{ matrix.module }}
+          start: npm run start:local-staging
           wait-on: 'http://localhost:4200'
           wait-on-timeout: 120
           record: true
           parallel: true
-          spec: cypress/integration/liquid/liquid.spec.ts
-          group: Tests on ${{ matrix.browser }} (Liquid)
-          browser: ${{ matrix.browser }}
-          ci-build-id: '${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}'
-        env:
-          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          CYPRESS_PROJECT_ID: ${{ secrets.CYPRESS_PROJECT_ID }}
-
-      - name: ${{ matrix.browser }} browser tests (Bisq)
-        uses: cypress-io/github-action@v2
-        if: always()
-        with:
-          working-directory: frontend
-          build: npm run config:defaults:bisq
-          start: npm run start:local-prod
-          wait-on: 'http://localhost:4200'
-          wait-on-timeout: 120
-          record: true
-          parallel: true
-          spec: cypress/integration/bisq/bisq.spec.ts
-          group: Tests on ${{ matrix.browser }} (Bisq)
-          browser: ${{ matrix.browser }}
+          spec: ${{ matrix.spec }}
+          group: Tests on Chrome (${{ matrix.module }})
+          browser: "chrome"
           ci-build-id: '${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}'
         env:
+          COMMIT_INFO_MESSAGE: ${{ github.event.pull_request.title }}
           CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           CYPRESS_PROJECT_ID: ${{ secrets.CYPRESS_PROJECT_ID }}

.github/workflows/on-tag.yml

@@ -1,7 +1,7 @@
 name: Docker build on tag
 env:
   DOCKER_CLI_EXPERIMENTAL: enabled
-  TAG_FMT: '^refs/tags/(((.?[0-9]+){3,4}))$'
+  TAG_FMT: "^refs/tags/(((.?[0-9]+){3,4}))$"
   DOCKER_BUILDKIT: 0
   COMPOSE_DOCKER_CLI_BUILD: 0
 
@@ -11,6 +11,9 @@ on:
       - v[0-9]+.[0-9]+.[0-9]+
       - v[0-9]+.[0-9]+.[0-9]+-*
 
+permissions:
+  contents: read
+
 jobs:
   build:
     strategy:
@@ -18,16 +21,46 @@ jobs:
         service:
           - frontend
           - backend
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
     name: Build and push to DockerHub
     steps:
+      # Workaround based on JonasAlfredsson/docker-on-tmpfs@v1.0.1
+      - name: Replace the current swap file
+        shell: bash
+        run: |
+          sudo swapoff /mnt/swapfile
+          sudo rm -v /mnt/swapfile
+          sudo fallocate -l 10G /mnt/swapfile
+          sudo chmod 600 /mnt/swapfile
+          sudo mkswap /mnt/swapfile
+          sudo swapon /mnt/swapfile
+
+      - name: Show current memory and swap status
+        shell: bash
+        run: |
+          sudo free -h
+          echo
+          sudo swapon --show
+
+      - name: Mount a tmpfs over /var/lib/docker
+        shell: bash
+        run: |
+          if [ ! -d "/var/lib/docker" ]; then
+            echo "Directory '/var/lib/docker' not found"
+            exit 1
+          fi
+          sudo mount -t tmpfs -o size=10G tmpfs /var/lib/docker
+          sudo systemctl restart docker
+          sudo df -h | grep docker
+
       - name: Set env variables
         run: echo "TAG=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_ENV
 
       - name: Show set environment variables
         run: |
           printf "      TAG: %s\n"  "$TAG"
-      
+
       - name: Add SHORT_SHA env property with commit short sha
         run: echo "SHORT_SHA=`echo ${GITHUB_SHA} | cut -c1-8`" >> $GITHUB_ENV
 
@@ -35,24 +68,24 @@ jobs:
         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
 
       - name: Checkout project
-        uses: actions/checkout@v2
+        uses: actions/checkout@e2f20e631ae6d7dd3b768f56a5d2af784dd54791 # v2.5.0
 
       - name: Init repo for Dockerization
         run: docker/init.sh "$TAG"
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # v2.1.0
         id: qemu
 
       - name: Setup Docker buildx action
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@8c0edbc76e98fa90f69d9a2c020dcb50019dc325 # v2.2.1
         id: buildx
 
       - name: Available platforms
         run: echo ${{ steps.buildx.outputs.platforms }}
 
       - name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@9b0c1fce7a93df8e3bb8926b0d6e9d89e92f20a7 # v3.0.11
         id: cache
         with:
           path: /tmp/.buildx-cache

.gitignore

@@ -2,3 +2,6 @@ sitemap
 data
 docker-compose.yml
 backend/mempool-config.json
+*.swp
+frontend/src/resources/config.template.js
+frontend/src/resources/config.js

.nvmrc

@@ -1 +1 @@
-v16.10.0
+v16.16.0

CONTRIBUTING.md

@@ -0,0 +1,51 @@
+# Contributing to The Mempool Open Source Project
+
+Thank you for contributing to The Mempool Open Source Project managed by Mempool Space K.K. (“Mempool”).
+
+In order to clarify the intellectual property license granted with Contributions from any person or entity, Mempool must have a statement on file from each Contributor indicating their agreement to the Contributor License Agreement (“Agreement”). This license is for your protection as a Contributor as well as the protection of Mempool and its other contributors and users; it does not change your rights to use your own Contributions for any other purpose.
+
+When submitting a pull request for the first time, please create a file with a name like `/contributors/{github_username}.txt`, and in the content of that file indicate your agreement to the Contributor License Agreement terms below. An example of what that file should contain can be seen in wiz's agreement file. (This method of CLA "signing" is borrowed from Medium's open source project.)
+
+Also, please GPG-sign all your commits (`git config commit.gpgsign true`).
+
+# Contributor License Agreement
+
+Last Updated: January 25, 2022
+
+By accepting this Agreement, You agree to the following terms and conditions for Your present and future Contributions submitted to Mempool. Except for the license granted herein to Mempool and recipients of software distributed by Mempool, You reserve all right, title, and interest in and to Your Contributions.
+
+### 1. Definitions
+
+“You” (or “Your”) shall mean the copyright owner or legal entity authorized by the copyright owner that is making this Agreement with Mempool. For legal entities, the entity making a Contribution and all other entities that control, are controlled by, or are under common control with that entity are considered to be a single Contributor. For the purposes of this definition, “control” means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity.
+
+“Contribution” shall mean any original work of authorship, including any modifications or additions to an existing work, that is intentionally submitted by You to Mempool for inclusion in, or documentation of, any of the products owned or managed by Mempool (“Work”). For the purposes of this definition, “submitted” means any form of electronic, verbal, or written communication sent to Mempool or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, Mempool for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by You as “Not a Contribution.”
+
+### 2. Grant of Copyright License
+
+Subject to the terms and conditions of this Agreement, You hereby grant to Mempool and to recipients of software distributed by Mempool a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Your Contributions and such derivative works.
+
+### 3. Grant of Patent License
+
+Subject to the terms and conditions of this Agreement, You hereby grant to Mempool and to recipients of software distributed by Mempool a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by You that are necessarily infringed by Your Contribution(s) alone or by combination of Your Contribution(s) with the Work to which such Contribution(s) was submitted. If any entity institutes patent litigation against You or any other entity (including a cross-claim or counterclaim in a lawsuit) alleging that your Contribution, or the Work to which you have contributed, constitutes direct or contributory patent infringement, then any patent licenses granted to that entity under this Agreement for that Contribution or Work shall terminate as of the date such litigation is filed.
+
+### 4. Authority
+
+You represent that you are legally entitled to grant the above license. If your employer(s) has rights to intellectual property that you create that includes your Contributions, you represent that you have received permission to make Contributions on behalf of that employer, that your employer has waived such rights for your Contributions to Mempool, or that your employer has executed a separate Corporate Contributor License Agreement with Mempool.
+
+### 5. Originality
+
+You represent that each of Your Contributions is Your original creation (see section 7 for submissions on behalf of others). You represent that Your Contribution submissions include complete details of any third-party license or other restriction (including, but not limited to, related patents and trademarks) of which you are personally aware, and which are associated with any part of Your Contributions.
+
+### 6. Support
+
+You are not expected to provide support for Your Contributions, except to the extent You desire to provide support. You may provide support for free, for a fee, or not at all. Unless required by applicable law or agreed to in writing, You provide Your Contributions on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON- INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE.
+
+### 7. Third Party Contributions
+
+Should You wish to submit work that is not Your original creation, You may submit it to Mempool separately from any Contribution, identifying the complete details of its source and of any license or other restriction (including, but not limited to, related patents, trademarks, and license agreements) of which you are personally aware, and conspicuously marking the work as “Submitted on behalf of a third-party: [named here]”.
+
+### 8. Notifications
+
+You agree to notify Mempool of any facts or circumstances of which you become aware that would make these representations inaccurate in any respect.
+
+EOF

GNUmakefile

@@ -25,8 +25,7 @@ help:
 .PHONY: init
 init:
 	@echo ''
-	mkdir -p   $(DATA) $(DATA)/mysql $(DATA)/mysql/db-scripts $(DATA)/mysql/data 
-	install -v mariadb-structure.sql $(DATA)/mysql/db-scripts
+	mkdir -p   $(DATA) $(DATA)/mysql $(DATA)/mysql/data 
 	#REF: https://github.com/mempool/mempool/blob/master/docker/README.md
 	cat docker/docker-compose.yml > docker-compose.yml
 	cat backend/mempool-config.sample.json > backend/mempool-config.json

LICENSE

@@ -1,5 +1,5 @@
 The Mempool Open Source Project
-Copyright (c) 2019-2021 The Mempool Open Source Project Developers
+Copyright (c) 2019-2022 The Mempool Open Source Project Developers
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of (at your option) either:

README.md

@@ -1,188 +1,33 @@
-# The Mempool Open Source Project™
+# The Mempool Open Source Project™ [![mempool](https://img.shields.io/endpoint?url=https://dashboard.cypress.io/badge/simple/ry4br7/master&style=flat-square)](https://dashboard.cypress.io/projects/ry4br7/runs)
 
-Mempool is the fully featured visualizer, explorer, and API service running on [mempool.space](https://mempool.space/), an open source project developed and operated for the benefit of the Bitcoin community, with a focus on the emerging transaction fee market to help our transition into a multi-layer ecosystem.
+Mempool is the fully-featured mempool visualizer, explorer, and API service running at [mempool.space](https://mempool.space/). 
 
-![mempool](https://mempool.space/resources/screenshots/v2.3.0-dashboard.png)
+It is an open-source project developed and operated for the benefit of the Bitcoin community, with a focus on the emerging transaction fee market that is evolving Bitcoin into a multi-layer ecosystem.
 
-## Installation Methods
+![mempool](https://mempool.space/resources/screenshots/v2.4.0-dashboard.png)
 
-Mempool can be self-hosted on a wide variety of your own hardware, ranging from a simple one-click installation on a Raspberry Pi distro, all the way to an advanced high availability cluster of powerful servers for a production instance. We support the following installation methods, ranked in order from simple to advanced:
+# Installation Methods
 
-1) One-click installation on: [Umbrel](https://github.com/getumbrel/umbrel), [RaspiBlitz](https://github.com/rootzoll/raspiblitz), [RoninDojo](https://code.samourai.io/ronindojo/RoninDojo), or [MyNode](https://github.com/mynodebtc/mynode).
-2) [Docker installation on Linux using docker-compose](https://github.com/mempool/mempool/tree/master/docker)
-3) [Manual installation on Linux or FreeBSD](https://github.com/mempool/mempool#manual-installation)
-4) [Production installation on a powerful FreeBSD server](https://github.com/mempool/mempool/tree/master/production)
-5) [High Availability cluster using powerful FreeBSD servers](https://github.com/mempool/mempool/tree/master/production#high-availability)
+Mempool can be self-hosted on a wide variety of your own hardware, ranging from a simple one-click installation on a Raspberry Pi full-node distro all the way to a robust production instance on a powerful FreeBSD server. 
 
-# Manual Installation
+**Most people should use a one-click install method.** Other install methods are meant for developers and others with experience managing servers. 
 
-The following instructions are for a manual installation on Linux or FreeBSD. The file and directory paths may need to be changed to match your OS.
+<a id="one-click-installation"></a>
+## One-Click Installation
 
-## Dependencies
+Mempool can be conveniently installed on the following full-node distros: 
+- [Umbrel](https://github.com/getumbrel/umbrel)
+- [RaspiBlitz](https://github.com/rootzoll/raspiblitz)
+- [RoninDojo](https://code.samourai.io/ronindojo/RoninDojo)
+- [myNode](https://github.com/mynodebtc/mynode)
+- [Start9](https://github.com/Start9Labs/embassy-os)
 
-* [Bitcoin](https://github.com/bitcoin/bitcoin)
-* [Electrum](https://github.com/romanz/electrs)
-* [NodeJS](https://github.com/nodejs/node)
-* [MariaDB](https://github.com/mariadb/server)
-* [Nginx](https://github.com/nginx/nginx)
+**We highly recommend you deploy your own Mempool instance this way.** No matter which option you pick, you'll be able to get your own fully-sovereign instance of Mempool up quickly without needing to fiddle with any settings.
 
-## Mempool
+## Advanced Installation Methods
 
-Clone the mempool repo, and checkout the latest release tag:
-```bash
-  git clone https://github.com/mempool/mempool
-  cd mempool
-  latestrelease=$(curl -s https://api.github.com/repos/mempool/mempool/releases/latest|grep tag_name|head -1|cut -d '"' -f4)
-  git checkout $latestrelease
-```
+Mempool can be installed in other ways too, but we only recommend doing so if you're a developer, have experience managing servers, or otherwise know what you're doing.
 
-## Bitcoin Core (bitcoind)
-
-Enable RPC and txindex in `bitcoin.conf`:
-```bash
-  rpcuser=mempool
-  rpcpassword=mempool
-  txindex=1
-```
-
-## MySQL
-
-Install MariaDB from OS package manager:
-```bash
-  # Linux
-  apt-get install mariadb-server mariadb-client
-
-  # macOS
-  brew install mariadb
-  mysql.server start
-```
-
-Create database and grant privileges:
-```bash
-  MariaDB [(none)]> drop database mempool;
-  Query OK, 0 rows affected (0.00 sec)
-
-  MariaDB [(none)]> create database mempool;
-  Query OK, 1 row affected (0.00 sec)
-
-  MariaDB [(none)]> grant all privileges on mempool.* to 'mempool'@'%' identified by 'mempool';
-  Query OK, 0 rows affected (0.00 sec)
-```
-
-From the mempool repo's top-level folder, import the database structure:
-```bash
-  mysql -u mempool -p mempool < mariadb-structure.sql
-```
-
-## Mempool Backend
-Install mempool dependencies from npm and build the backend:
-
-```bash
-  # backend
-  cd backend
-  npm install --prod
-  npm run build
-```
-
-In the `backend` folder, make a copy of the sample config and modify it to fit your settings.
-
-```bash
-  cp mempool-config.sample.json mempool-config.json
-```
-
-Edit `mempool-config.json` to add your Bitcoin Core node RPC credentials:
-```bash
-{
-  "MEMPOOL": {
-    "NETWORK": "mainnet",
-    "BACKEND": "electrum",
-    "HTTP_PORT": 8999
-  },
-  "CORE_RPC": {
-    "HOST": "127.0.0.1",
-    "PORT": 8332,
-    "USERNAME": "mempool",
-    "PASSWORD": "mempool"
-  },
-  "ELECTRUM": {
-    "HOST": "127.0.0.1",
-    "PORT": 50002,
-    "TLS_ENABLED": true
-  },
-  "DATABASE": {
-    "ENABLED": true,
-    "HOST": "127.0.0.1",
-    "PORT": 3306,
-    "USERNAME": "mempool",
-    "PASSWORD": "mempool",
-    "DATABASE": "mempool"
-  }
-}
-```
-
-Start the backend:
-
-```bash
-  npm run start
-```
-
-When it's running you should see output like this:
-
-```bash
-  Mempool updated in 0.189 seconds
-  Updating mempool
-  Mempool updated in 0.096 seconds
-  Updating mempool
-  Mempool updated in 0.099 seconds
-  Updating mempool
-  Calculated fee for transaction 1 / 10
-  Calculated fee for transaction 2 / 10
-  Calculated fee for transaction 3 / 10
-  Calculated fee for transaction 4 / 10
-  Calculated fee for transaction 5 / 10
-  Calculated fee for transaction 6 / 10
-  Calculated fee for transaction 7 / 10
-  Calculated fee for transaction 8 / 10
-  Calculated fee for transaction 9 / 10
-  Calculated fee for transaction 10 / 10
-  Mempool updated in 0.243 seconds
-  Updating mempool
-```
-
-## Mempool Frontend
-
-Install mempool dependencies from npm and build the frontend static HTML/CSS/JS:
-
-```bash
-  # frontend
-  cd frontend
-  npm install --prod
-  npm run build
-```
-
-Install the output into nginx webroot folder:
-
-```bash
-  sudo rsync -av --delete dist/mempool/ /var/www/
-```
-
-## nginx + certbot
-
-Install the supplied nginx.conf and nginx-mempool.conf in /etc/nginx
-
-```bash
-  # install nginx and certbot
-  apt-get install -y nginx python3-certbot-nginx
-
-  # install the mempool configuration for nginx
-  cp nginx.conf nginx-mempool.conf /etc/nginx/
-
-  # replace example.com with your domain name
-  certbot --nginx -d example.com
-
-```
-
-If everything went okay you should see the beautiful mempool :grin:
-
-If you get stuck on "loading blocks", this means the websocket can't connect.
-Check your nginx proxy setup, firewalls, etc. and open an issue if you need help.
+- See the [`docker/`](./docker/) directory for instructions on deploying Mempool with Docker.
+- See the [`backend/`](./backend/) and [`frontend/`](./frontend/) directories for manual install instructions oriented for developers.
+- See the [`production/`](./production/) directory for guidance on setting up a more serious Mempool instance designed for high performance at scale.

backend/.editorconfig

@@ -0,0 +1,17 @@
+# Editor configuration, see https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.ts]
+quote_type = single
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false
+

backend/.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+dist

backend/.eslintrc

@@ -0,0 +1,37 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "plugins": [
+    "@typescript-eslint"
+  ],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier"
+  ],
+  "rules": {
+    "@typescript-eslint/ban-ts-comment": 1,
+    "@typescript-eslint/ban-types": 1,
+    "@typescript-eslint/no-empty-function": 1,
+    "@typescript-eslint/no-explicit-any": 1,
+    "@typescript-eslint/no-inferrable-types": 0,
+    "@typescript-eslint/no-namespace": 1,
+    "@typescript-eslint/no-this-alias": 1,
+    "@typescript-eslint/no-var-requires": 1,
+    "@typescript-eslint/explicit-function-return-type": 1,
+    "no-console": 1,
+    "no-constant-condition": 1,
+    "no-dupe-else-if": 1,
+    "no-empty": 1,
+    "no-prototype-builtins": 1,
+    "no-self-assign": 1,
+    "no-useless-catch": 1,
+    "no-var": 1,
+    "prefer-const": 1,
+    "prefer-rest-params": 1,
+    "quotes": [1, "single", { "allowTemplateLiterals": true }],
+    "semi": 1,
+    "eqeqeq": 1
+  }
+}

backend/.gitignore

@@ -1,9 +1,10 @@
 # See http://help.github.com/ignore-files/ for more about ignoring files.
 
 # production config and external assets
-*.json
+!mempool-config.template.json
 !mempool-config.sample.json
-
+mempool-config.json
+pools.json
 icons.json
 
 # compiled output

backend/.prettierignore

@@ -0,0 +1,2 @@
+node_modules
+package-lock.json

backend/.prettierrc

@@ -0,0 +1,6 @@
+{
+  "endOfLine": "lf",
+  "printWidth": 80,
+  "tabWidth": 2,
+  "trailingComma": "es5"
+}

backend/README.md

@@ -0,0 +1,220 @@
+# Mempool Backend
+
+These instructions are mostly intended for developers. 
+
+If you choose to use these instructions for a production setup, be aware that you will still probably need to do additional configuration for your specific OS, environment, use-case, etc. We do our best here to provide a good starting point, but only proceed if you know what you're doing. Mempool does not provide support for custom setups.
+
+See other ways to set up Mempool on [the main README](/../../#installation-methods).
+
+Jump to a section in this doc:
+- [Set Up the Backend](#setup)
+- [Development Tips](#development-tips)
+
+## Setup
+
+### 1. Clone Mempool Repository
+
+Get the latest Mempool code:
+
+```
+git clone https://github.com/mempool/mempool
+cd mempool
+```
+
+Check out the latest release:
+
+```
+latestrelease=$(curl -s https://api.github.com/repos/mempool/mempool/releases/latest|grep tag_name|head -1|cut -d '"' -f4)
+git checkout $latestrelease
+```
+
+### 2. Configure Bitcoin Core
+
+Turn on `txindex`, enable RPC, and set RPC credentials in `bitcoin.conf`:
+
+```
+txindex=1
+server=1
+rpcuser=mempool
+rpcpassword=mempool
+```
+
+### 3. Configure Electrum Server
+
+[Pick an Electrum Server implementation](https://mempool.space/docs/faq#address-lookup-issues), configure it, and make sure it's synced.
+
+**This step is optional.** You can run Mempool without configuring an Electrum Server for it, but address lookups will be disabled.
+
+### 4. Configure MariaDB
+
+_Mempool needs MariaDB v10.5 or later. If you already have MySQL installed, make sure to migrate any existing databases **before** installing MariaDB._
+
+Get MariaDB from your operating system's package manager:
+
+```
+# Debian, Ubuntu, etc.
+apt-get install mariadb-server mariadb-client
+
+# macOS
+brew install mariadb
+mysql.server start
+```
+
+Create a database and grant privileges:
+
+```
+MariaDB [(none)]> drop database mempool;
+Query OK, 0 rows affected (0.00 sec)
+
+MariaDB [(none)]> create database mempool;
+Query OK, 1 row affected (0.00 sec)
+
+MariaDB [(none)]> grant all privileges on mempool.* to 'mempool'@'%' identified by 'mempool';
+Query OK, 0 rows affected (0.00 sec)
+```
+
+### 5. Prepare Mempool Backend
+
+#### Build
+
+_Make sure to use Node.js 16.10 and npm 7._
+
+Install dependencies with `npm` and build the backend:
+
+```
+cd backend
+npm install
+npm run build
+```
+
+#### Configure
+
+In the backend folder, make a copy of the sample config file:
+
+```
+cp mempool-config.sample.json mempool-config.json
+```
+
+Edit `mempool-config.json` as needed. 
+
+In particular, make sure:
+- the correct Bitcoin Core RPC credentials are specified in `CORE_RPC`
+- the correct `BACKEND` is specified in `MEMPOOL`:
+  - "electrum" if you're using [romanz/electrs](https://github.com/romanz/electrs) or [cculianu/Fulcrum](https://github.com/cculianu/Fulcrum)
+  - "esplora" if you're using [Blockstream/electrs](https://github.com/Blockstream/electrs)
+  - "none" if you're not using any Electrum Server
+
+### 6. Run Mempool Backend
+
+Run the Mempool backend:
+
+```
+npm run start
+
+```
+You can also set env var `MEMPOOL_CONFIG_FILE` to specify a custom config file location:
+```
+MEMPOOL_CONFIG_FILE=/path/to/mempool-config.json npm run start
+```
+
+When it's running, you should see output like this:
+
+```
+Mempool updated in 0.189 seconds
+Updating mempool
+Mempool updated in 0.096 seconds
+Updating mempool
+Mempool updated in 0.099 seconds
+Updating mempool
+Calculated fee for transaction 1 / 10
+Calculated fee for transaction 2 / 10
+Calculated fee for transaction 3 / 10
+Calculated fee for transaction 4 / 10
+Calculated fee for transaction 5 / 10
+Calculated fee for transaction 6 / 10
+Calculated fee for transaction 7 / 10
+Calculated fee for transaction 8 / 10
+Calculated fee for transaction 9 / 10
+Calculated fee for transaction 10 / 10
+Mempool updated in 0.243 seconds
+Updating mempool
+```
+
+### 7. Set Up Mempool Frontend
+With the backend configured and running, proceed to set up the [Mempool frontend](../frontend#manual-setup).
+
+## Development Tips
+
+### Set Up Backend Watchers
+
+The Mempool backend is static. TypeScript scripts are compiled into the `dist` folder and served through a Node.js web server. 
+
+As a result, for development purposes, you may find it helpful to set up backend watchers to avoid the manual shutdown/recompile/restart command-line cycle.
+
+First, install `nodemon` and `ts-node`:
+
+```
+npm install -g ts-node nodemon
+```
+
+Then, run the watcher:
+
+```
+nodemon src/index.ts --ignore cache/ --ignore pools.json
+```
+
+`nodemon` should be in npm's global binary folder. If needed, you can determine where that is with `npm -g bin`.
+
+### Useful Regtest Commands
+
+Helpful link: https://gist.github.com/System-Glitch/cb4e87bf1ae3fec9925725bb3ebe223a
+
+Run bitcoind on regtest:
+   ```
+   bitcoind -regtest -rpcport=8332
+   ```
+
+Create a new wallet, if needed:
+   ```
+   bitcoin-cli -regtest -rpcport=8332 createwallet test
+   ```
+
+Load wallet (this command may take a while if you have lot of UTXOs):
+   ```
+   bitcoin-cli -regtest -rpcport=8332 loadwallet test
+   ```
+
+Get a new address:
+   ```
+   address=$(./src/bitcoin-cli -regtest -rpcport=8332 getnewaddress)
+   ```
+
+Mine blocks to the previously generated address. You need at least 101 blocks before you can spend. This will take some time to execute (~1 min):
+   ```
+   bitcoin-cli -regtest -rpcport=8332 generatetoaddress 101 $address
+   ```
+
+Send 0.1 BTC at 5 sat/vB to another address:
+   ```
+   ./src/bitcoin-cli -named -regtest -rpcport=8332 sendtoaddress address=$(./src/bitcoin-cli -regtest -rpcport=8332 getnewaddress) amount=0.1 fee_rate=5
+   ```
+
+See more example of `sendtoaddress`:
+   ```
+   ./src/bitcoin-cli sendtoaddress # will print the help
+   ```
+
+Mini script to generate transactions with random TX fee-rate (between 1 to 100 sat/vB). It's slow so don't expect to use this to test mempool spam, except if you let it run for a long time, or maybe with multiple regtest nodes connected to each other.
+   ```
+   #!/bin/bash
+   address=$(./src/bitcoin-cli -regtest -rpcport=8332 getnewaddress)
+   for i in {1..1000000}
+   do
+     ./src/bitcoin-cli -regtest -rpcport=8332 -named sendtoaddress address=$address amount=0.01 fee_rate=$(jot -r 1  1 100)
+   done
+   ```
+
+Generate block at regular interval (every 10 seconds in this example):
+   ```
+   watch -n 10 "./src/bitcoin-cli -regtest -rpcport=8332 generatetoaddress 1 $address"
+   ```

backend/jest.config.ts

@@ -0,0 +1,20 @@
+import type { Config } from "@jest/types"
+
+const config: Config.InitialOptions = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  verbose: true,
+  automock: false,
+  collectCoverage: true,
+  collectCoverageFrom: ["./src/**/**.ts"],
+  coverageProvider: "babel",
+  coverageThreshold: {
+    global: {
+      lines: 1
+    }
+  },
+  setupFiles: [
+    "./testSetup.ts",
+  ],
+}
+export default config;

backend/mempool-config.sample.json

@@ -2,6 +2,7 @@
   "MEMPOOL": {
     "NETWORK": "mainnet",
     "BACKEND": "electrum",
+    "ENABLED": true,
     "HTTP_PORT": 8999,
     "SPAWN_CLUSTER_PROCS": 0,
     "API_URL_PREFIX": "/api/v1/",
@@ -12,9 +13,21 @@
     "BLOCK_WEIGHT_UNITS": 4000000,
     "INITIAL_BLOCKS_AMOUNT": 8,
     "MEMPOOL_BLOCKS_AMOUNT": 8,
-    "PRICE_FEED_UPDATE_INTERVAL": 3600,
+    "INDEXING_BLOCKS_AMOUNT": 11000,
+    "BLOCKS_SUMMARIES_INDEXING": false,
+    "PRICE_FEED_UPDATE_INTERVAL": 600,
     "USE_SECOND_NODE_FOR_MINFEE": false,
-    "EXTERNAL_ASSETS": []
+    "EXTERNAL_ASSETS": [],
+    "EXTERNAL_MAX_RETRY": 1,
+    "EXTERNAL_RETRY_INTERVAL": 0,
+    "USER_AGENT": "mempool",
+    "STDOUT_LOG_MIN_PRIORITY": "debug",
+    "AUTOMATIC_BLOCK_REINDEXING": false,
+    "POOLS_JSON_URL": "https://raw.githubusercontent.com/mempool/mining-pools/master/pools.json",
+    "POOLS_JSON_TREE_URL": "https://api.github.com/repos/mempool/mining-pools/git/trees/master",
+    "ADVANCED_GBT_AUDIT": false,
+    "ADVANCED_GBT_MEMPOOL": false,
+    "TRANSACTION_INDEXING": false
   },
   "CORE_RPC": {
     "HOST": "127.0.0.1",
@@ -40,6 +53,7 @@
     "ENABLED": true,
     "HOST": "127.0.0.1",
     "PORT": 3306,
+    "SOCKET": "/var/run/mysql/mysql.sock",
     "DATABASE": "mempool",
     "USERNAME": "mempool",
     "PASSWORD": "mempool"
@@ -55,8 +69,51 @@
     "ENABLED": true,
     "TX_PER_SECOND_SAMPLE_PERIOD": 150
   },
+  "MAXMIND": {
+    "ENABLED": false,
+    "GEOLITE2_CITY": "/usr/local/share/GeoIP/GeoLite2-City.mmdb",
+    "GEOLITE2_ASN": "/usr/local/share/GeoIP/GeoLite2-ASN.mmdb",
+    "GEOIP2_ISP": "/usr/local/share/GeoIP/GeoIP2-ISP.mmdb"
+  },
   "BISQ": {
     "ENABLED": false,
     "DATA_PATH": "/bisq/statsnode-data/btc_mainnet/db"
+  },
+  "LIGHTNING": {
+    "ENABLED": false,
+    "BACKEND": "lnd",
+    "STATS_REFRESH_INTERVAL": 600,
+    "GRAPH_REFRESH_INTERVAL": 600,
+    "LOGGER_UPDATE_INTERVAL": 30,
+    "FORENSICS_INTERVAL": 43200,
+    "FORENSICS_RATE_LIMIT": 20
+  },
+  "LND": {
+    "TLS_CERT_PATH": "tls.cert",
+    "MACAROON_PATH": "readonly.macaroon",
+    "REST_API_URL": "https://localhost:8080"
+  },
+  "CLIGHTNING": {
+    "SOCKET": "lightning-rpc"
+  },
+  "SOCKS5PROXY": {
+    "ENABLED": false,
+    "USE_ONION": true,
+    "HOST": "127.0.0.1",
+    "PORT": 9050,
+    "USERNAME": "",
+    "PASSWORD": ""
+  },
+  "PRICE_DATA_SERVER": {
+    "TOR_URL": "http://wizpriceje6q5tdrxkyiazsgu7irquiqjy2dptezqhrtu7l2qelqktid.onion/getAllMarketPrices",
+    "CLEARNET_URL": "https://price.bisq.wiz.biz/getAllMarketPrices"
+  },
+  "EXTERNAL_DATA_SERVER": {
+    "MEMPOOL_API": "https://mempool.space/api/v1",
+    "MEMPOOL_ONION": "http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/api/v1",
+    "LIQUID_API": "https://liquid.network/api/v1",
+    "LIQUID_ONION": "http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1",
+    "BISQ_URL": "https://bisq.markets/api",
+    "BISQ_ONION": "http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api"
   }
 }

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mempool-backend",
-  "version": "2.3.0-dev",
+  "version": "2.5.0-dev",
   "description": "Bitcoin mempool visualizer and blockchain explorer backend",
   "license": "GNU Affero General Public License v3.0",
   "homepage": "https://mempool.space",
@@ -16,35 +16,53 @@
     "mempool",
     "blockchain",
     "explorer",
-    "liquid"
+    "liquid",
+    "lightning"
   ],
   "main": "index.ts",
   "scripts": {
-    "ng": "./node_modules/@angular/cli/bin/ng",
-    "tsc": "./node_modules/typescript/bin/tsc",
-    "build": "npm run tsc",
+    "tsc": "./node_modules/typescript/bin/tsc -p tsconfig.build.json",
+    "build": "npm run tsc && npm run create-resources",
+    "create-resources": "cp ./src/tasks/price-feeds/mtgox-weekly.json ./dist/tasks && node dist/api/fetch-version.js",
+    "package": "npm run build && rm -rf package && mv dist package && mv node_modules package && npm run package-rm-build-deps",
+    "package-rm-build-deps": "(cd package/node_modules; rm -r typescript @typescript-eslint)",
     "start": "node --max-old-space-size=2048 dist/index.js",
     "start-production": "node --max-old-space-size=4096 dist/index.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "./node_modules/.bin/jest --coverage",
+    "lint": "./node_modules/.bin/eslint . --ext .ts",
+    "lint:fix": "./node_modules/.bin/eslint . --ext .ts --fix",
+    "prettier": "./node_modules/.bin/prettier --write \"src/**/*.{js,ts}\""
   },
   "dependencies": {
-    "@mempool/bitcoin": "^3.0.3",
+    "@babel/core": "^7.20.5",
     "@mempool/electrum-client": "^1.1.7",
-    "@types/ws": "8.2.2",
-    "axios": "0.24.0",
-    "bitcoinjs-lib": "6.0.1",
-    "crypto-js": "^4.0.0",
-    "express": "^4.17.1",
-    "locutus": "^2.0.12",
-    "mysql2": "2.3.3",
-    "node-worker-threads-pool": "^1.4.3",
-    "typescript": "4.4.4",
-    "ws": "8.3.0"
+    "@types/node": "^16.11.41",
+    "axios": "~0.27.2",
+    "bitcoinjs-lib": "~6.0.2",
+    "crypto-js": "~4.1.1",
+    "express": "~4.18.2",
+    "maxmind": "~4.3.8",
+    "mysql2": "~2.3.3",
+    "node-worker-threads-pool": "~1.5.1",
+    "socks-proxy-agent": "~7.0.0",
+    "typescript": "~4.7.4",
+    "ws": "~8.11.0"
   },
   "devDependencies": {
-    "@types/compression": "^1.0.1",
-    "@types/express": "^4.17.2",
-    "@types/locutus": "^0.0.6",
-    "tslint": "^6.1.0"
+    "@babel/core": "^7.20.5",
+    "@babel/code-frame": "^7.18.6",
+    "@types/compression": "^1.7.2",
+    "@types/crypto-js": "^4.1.1",
+    "@types/express": "^4.17.14",
+    "@types/jest": "^29.2.3",
+    "@types/ws": "~8.5.3",
+    "@typescript-eslint/eslint-plugin": "^5.45.0",
+    "@typescript-eslint/parser": "^5.45.0",
+    "eslint": "^8.28.0",
+    "eslint-config-prettier": "^8.5.0",
+    "jest": "^29.3.1",
+    "prettier": "^2.8.0",
+    "ts-jest": "^29.0.3",
+    "ts-node": "^10.9.1"
   }
 }

backend/src/__fixtures__/mempool-config.template.json

@@ -0,0 +1,115 @@
+{
+  "MEMPOOL": {
+    "ENABLED": true,
+    "NETWORK": "__MEMPOOL_NETWORK__",
+    "BACKEND": "__MEMPOOL_BACKEND__",
+    "ENABLED": true,
+    "BLOCKS_SUMMARIES_INDEXING": true,
+    "HTTP_PORT": 1,
+    "SPAWN_CLUSTER_PROCS": 2,
+    "API_URL_PREFIX": "__MEMPOOL_API_URL_PREFIX__",
+    "AUTOMATIC_BLOCK_REINDEXING": true,
+    "POLL_RATE_MS": 3,
+    "CACHE_DIR": "__MEMPOOL_CACHE_DIR__",
+    "CLEAR_PROTECTION_MINUTES": 4,
+    "RECOMMENDED_FEE_PERCENTILE": 5,
+    "BLOCK_WEIGHT_UNITS": 6,
+    "INITIAL_BLOCKS_AMOUNT": 7,
+    "MEMPOOL_BLOCKS_AMOUNT": 8,
+    "PRICE_FEED_UPDATE_INTERVAL": 9,
+    "USE_SECOND_NODE_FOR_MINFEE": 10,
+    "EXTERNAL_ASSETS": 11,
+    "EXTERNAL_MAX_RETRY": 12,
+    "EXTERNAL_RETRY_INTERVAL": 13,
+    "USER_AGENT": "__MEMPOOL_USER_AGENT__",
+    "STDOUT_LOG_MIN_PRIORITY": "__MEMPOOL_STDOUT_LOG_MIN_PRIORITY__",
+    "INDEXING_BLOCKS_AMOUNT": 14,
+    "POOLS_JSON_TREE_URL": "__POOLS_JSON_TREE_URL__",
+    "POOLS_JSON_URL": "__POOLS_JSON_URL__",
+    "ADVANCED_GBT_AUDIT": "__ADVANCED_GBT_AUDIT__",
+    "ADVANCED_GBT_MEMPOOL": "__ADVANCED_GBT_MEMPOOL__",
+    "TRANSACTION_INDEXING": "__TRANSACTION_INDEXING__"
+  },
+  "CORE_RPC": {
+    "HOST": "__CORE_RPC_HOST__",
+    "PORT": 15,
+    "USERNAME": "__CORE_RPC_USERNAME__",
+    "PASSWORD": "__CORE_RPC_PASSWORD__"
+  },
+  "ELECTRUM": {
+    "HOST": "__ELECTRUM_HOST__",
+    "PORT": 16,
+    "TLS_ENABLED": true
+  },
+  "ESPLORA": {
+    "REST_API_URL": "__ESPLORA_REST_API_URL__"
+  },
+  "SECOND_CORE_RPC": {
+    "HOST": "__SECOND_CORE_RPC_HOST__",
+    "PORT": 17,
+    "USERNAME": "__SECOND_CORE_RPC_USERNAME__",
+    "PASSWORD": "__SECOND_CORE_RPC_PASSWORD__"
+  },
+  "DATABASE": {
+    "ENABLED": false,
+    "HOST": "__DATABASE_HOST__",
+    "SOCKET": "__DATABASE_SOCKET__",
+    "PORT": 18,
+    "DATABASE": "__DATABASE_DATABASE__",
+    "USERNAME": "__DATABASE_USERNAME__",
+    "PASSWORD": "__DATABASE_PASSWORD__"
+  },
+  "SYSLOG": {
+    "ENABLED": false,
+    "HOST": "__SYSLOG_HOST__",
+    "PORT": 19,
+    "MIN_PRIORITY": "__SYSLOG_MIN_PRIORITY__",
+    "FACILITY": "__SYSLOG_FACILITY__"
+  },
+  "STATISTICS": {
+    "ENABLED": false,
+    "TX_PER_SECOND_SAMPLE_PERIOD": 20
+  },
+  "BISQ": {
+    "ENABLED": true,
+    "DATA_PATH": "__BISQ_DATA_PATH__"
+  },
+  "SOCKS5PROXY": {
+    "ENABLED": true,
+    "USE_ONION": true,
+    "HOST": "__SOCKS5PROXY_HOST__",
+    "PORT": "__SOCKS5PROXY_PORT__",
+    "USERNAME": "__SOCKS5PROXY_USERNAME__",
+    "PASSWORD": "__SOCKS5PROXY_PASSWORD__"
+  },
+  "PRICE_DATA_SERVER": {
+    "TOR_URL": "__PRICE_DATA_SERVER_TOR_URL__",
+    "CLEARNET_URL": "__PRICE_DATA_SERVER_CLEARNET_URL__"
+  },
+  "EXTERNAL_DATA_SERVER": {
+    "MEMPOOL_API": "__EXTERNAL_DATA_SERVER_MEMPOOL_API__",
+    "MEMPOOL_ONION": "__EXTERNAL_DATA_SERVER_MEMPOOL_ONION__",
+    "LIQUID_API": "__EXTERNAL_DATA_SERVER_LIQUID_API__",
+    "LIQUID_ONION": "__EXTERNAL_DATA_SERVER_LIQUID_ONION__",
+    "BISQ_URL": "__EXTERNAL_DATA_SERVER_BISQ_URL__",
+    "BISQ_ONION": "__EXTERNAL_DATA_SERVER_BISQ_ONION__"
+  },
+  "LIGHTNING": {
+    "ENABLED": "__LIGHTNING_ENABLED__",
+    "BACKEND": "__LIGHTNING_BACKEND__",
+    "TOPOLOGY_FOLDER": "__LIGHTNING_TOPOLOGY_FOLDER__",
+    "STATS_REFRESH_INTERVAL": 600,
+    "GRAPH_REFRESH_INTERVAL": 600,
+    "LOGGER_UPDATE_INTERVAL": 30,
+    "FORENSICS_INTERVAL": 43200,
+    "FORENSICS_RATE_LIMIT": "__FORENSICS_RATE_LIMIT__"
+  },
+  "LND": {
+    "TLS_CERT_PATH": "",
+    "MACAROON_PATH": "",
+    "REST_API_URL": "https://localhost:8080"
+  },
+  "CLIGHTNING": {
+    "SOCKET": "__CLIGHTNING_SOCKET__"
+  }
+}

backend/src/__tests__/api/difficulty-adjustment.test.ts

@@ -0,0 +1,62 @@
+import { calcDifficultyAdjustment, DifficultyAdjustment } from '../../api/difficulty-adjustment';
+
+describe('Mempool Difficulty Adjustment', () => {
+  test('should calculate Difficulty Adjustments properly', () => {
+    const dt = (dtString) => {
+      return Math.floor(new Date(dtString).getTime() / 1000);
+    };
+
+    const vectors = [
+      [ // Vector 1
+        [ // Inputs
+          dt('2022-08-18T11:07:00.000Z'), // Last DA time (in seconds)
+          dt('2022-08-19T14:03:53.000Z'), // Current time (now) (in seconds)
+          750134,                         // Current block height
+          0.6280047707459726,             // Previous retarget % (Passed through)
+          'mainnet',                      // Network (if testnet, next value is non-zero)
+          0,                              // If not testnet, not used
+        ],
+        { // Expected Result
+          progressPercent: 9.027777777777777,
+          difficultyChange: 12.562233927411782,
+          estimatedRetargetDate: 1661895424692,
+          remainingBlocks: 1834,
+          remainingTime: 977591692,
+          previousRetarget: 0.6280047707459726,
+          nextRetargetHeight: 751968,
+          timeAvg: 533038,
+          timeOffset: 0,
+        },
+      ],
+      [ // Vector 2 (testnet)
+        [ // Inputs
+          dt('2022-08-18T11:07:00.000Z'), // Last DA time (in seconds)
+          dt('2022-08-19T14:03:53.000Z'), // Current time (now) (in seconds)
+          750134,                         // Current block height
+          0.6280047707459726,             // Previous retarget % (Passed through)
+          'testnet',                      // Network
+          dt('2022-08-19T13:52:46.000Z'), // Latest block timestamp in seconds
+        ],
+        { // Expected Result is same other than timeOffset
+          progressPercent: 9.027777777777777,
+          difficultyChange: 12.562233927411782,
+          estimatedRetargetDate: 1661895424692,
+          remainingBlocks: 1834,
+          remainingTime: 977591692,
+          previousRetarget: 0.6280047707459726,
+          nextRetargetHeight: 751968,
+          timeAvg: 533038,
+          timeOffset: -667000, // 11 min 7 seconds since last block (testnet only)
+          // If we add time avg to abs(timeOffset) it makes exactly 1200000 ms, or 20 minutes
+        },
+      ],
+    ] as [[number, number, number, number, string, number], DifficultyAdjustment][];
+
+    for (const vector of vectors) {
+      const result = calcDifficultyAdjustment(...vector[0]);
+      // previousRetarget is passed through untouched
+      expect(result.previousRetarget).toStrictEqual(vector[0][3]);
+      expect(result).toStrictEqual(vector[1]);
+    }
+  });
+});

backend/src/__tests__/config.test.ts

@@ -0,0 +1,143 @@
+import * as fs from 'fs';
+
+describe('Mempool Backend Config', () => {
+  beforeEach(() => {
+    jest.resetAllMocks();
+    jest.resetModules();
+  });
+
+  test('should return defaults when no file is present', () => {
+    jest.isolateModules(() => {
+      jest.mock('../../mempool-config.json', () => ({}), { virtual: true });
+
+      const config = jest.requireActual('../config').default;
+
+      expect(config.MEMPOOL).toStrictEqual({
+        ENABLED: true,
+        NETWORK: 'mainnet',
+        BACKEND: 'none',
+        BLOCKS_SUMMARIES_INDEXING: false,
+        HTTP_PORT: 8999,
+        SPAWN_CLUSTER_PROCS: 0,
+        API_URL_PREFIX: '/api/v1/',
+        AUTOMATIC_BLOCK_REINDEXING: false,
+        POLL_RATE_MS: 2000,
+        CACHE_DIR: './cache',
+        CLEAR_PROTECTION_MINUTES: 20,
+        RECOMMENDED_FEE_PERCENTILE: 50,
+        BLOCK_WEIGHT_UNITS: 4000000,
+        INITIAL_BLOCKS_AMOUNT: 8,
+        MEMPOOL_BLOCKS_AMOUNT: 8,
+        INDEXING_BLOCKS_AMOUNT: 11000,
+        PRICE_FEED_UPDATE_INTERVAL: 600,
+        USE_SECOND_NODE_FOR_MINFEE: false,
+        EXTERNAL_ASSETS: [],
+        EXTERNAL_MAX_RETRY: 1,
+        EXTERNAL_RETRY_INTERVAL: 0,
+        USER_AGENT: 'mempool',
+        STDOUT_LOG_MIN_PRIORITY: 'debug',
+        POOLS_JSON_TREE_URL: 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
+        POOLS_JSON_URL: 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools.json',
+        ADVANCED_GBT_AUDIT: false,
+        ADVANCED_GBT_MEMPOOL: false,
+        TRANSACTION_INDEXING: false,
+      });
+
+      expect(config.ELECTRUM).toStrictEqual({ HOST: '127.0.0.1', PORT: 3306, TLS_ENABLED: true });
+
+      expect(config.ESPLORA).toStrictEqual({ REST_API_URL: 'http://127.0.0.1:3000' });
+
+      expect(config.CORE_RPC).toStrictEqual({
+        HOST: '127.0.0.1',
+        PORT: 8332,
+        USERNAME: 'mempool',
+        PASSWORD: 'mempool'
+      });
+
+      expect(config.SECOND_CORE_RPC).toStrictEqual({
+        HOST: '127.0.0.1',
+        PORT: 8332,
+        USERNAME: 'mempool',
+        PASSWORD: 'mempool'
+      });
+
+      expect(config.DATABASE).toStrictEqual({
+        ENABLED: true,
+        HOST: '127.0.0.1',
+        SOCKET: '',
+        PORT: 3306,
+        DATABASE: 'mempool',
+        USERNAME: 'mempool',
+        PASSWORD: 'mempool'
+      });
+
+      expect(config.SYSLOG).toStrictEqual({
+        ENABLED: true,
+        HOST: '127.0.0.1',
+        PORT: 514,
+        MIN_PRIORITY: 'info',
+        FACILITY: 'local7'
+      });
+
+      expect(config.STATISTICS).toStrictEqual({ ENABLED: true, TX_PER_SECOND_SAMPLE_PERIOD: 150 });
+
+      expect(config.BISQ).toStrictEqual({ ENABLED: false, DATA_PATH: '/bisq/statsnode-data/btc_mainnet/db' });
+
+      expect(config.SOCKS5PROXY).toStrictEqual({
+        ENABLED: false,
+        USE_ONION: true,
+        HOST: '127.0.0.1',
+        PORT: 9050,
+        USERNAME: '',
+        PASSWORD: ''
+      });
+
+      expect(config.PRICE_DATA_SERVER).toStrictEqual({
+        TOR_URL: 'http://wizpriceje6q5tdrxkyiazsgu7irquiqjy2dptezqhrtu7l2qelqktid.onion/getAllMarketPrices',
+        CLEARNET_URL: 'https://price.bisq.wiz.biz/getAllMarketPrices'
+      });
+
+      expect(config.EXTERNAL_DATA_SERVER).toStrictEqual({
+        MEMPOOL_API: 'https://mempool.space/api/v1',
+        MEMPOOL_ONION: 'http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/api/v1',
+        LIQUID_API: 'https://liquid.network/api/v1',
+        LIQUID_ONION: 'http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1',
+        BISQ_URL: 'https://bisq.markets/api',
+        BISQ_ONION: 'http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api'
+      });
+    });
+  });
+
+  test('should override the default values with the passed values', () => {
+    jest.isolateModules(() => {
+      const fixture = JSON.parse(fs.readFileSync(`${__dirname}/../__fixtures__/mempool-config.template.json`, 'utf8'));
+      jest.mock('../../mempool-config.json', () => (fixture), { virtual: true });
+
+      const config = jest.requireActual('../config').default;
+
+      expect(config.MEMPOOL).toStrictEqual(fixture.MEMPOOL);
+
+      expect(config.ELECTRUM).toStrictEqual(fixture.ELECTRUM);
+
+      expect(config.ESPLORA).toStrictEqual(fixture.ESPLORA);
+
+      expect(config.CORE_RPC).toStrictEqual(fixture.CORE_RPC);
+
+      expect(config.SECOND_CORE_RPC).toStrictEqual(fixture.SECOND_CORE_RPC);
+
+      expect(config.DATABASE).toStrictEqual(fixture.DATABASE);
+
+      expect(config.SYSLOG).toStrictEqual(fixture.SYSLOG);
+
+      expect(config.STATISTICS).toStrictEqual(fixture.STATISTICS);
+
+      expect(config.BISQ).toStrictEqual(fixture.BISQ);
+
+      expect(config.SOCKS5PROXY).toStrictEqual(fixture.SOCKS5PROXY);
+
+      expect(config.PRICE_DATA_SERVER).toStrictEqual(fixture.PRICE_DATA_SERVER);
+
+      expect(config.EXTERNAL_DATA_SERVER).toStrictEqual(fixture.EXTERNAL_DATA_SERVER);
+    });
+  });
+});

backend/src/api/audit.ts

@@ -0,0 +1,138 @@
+import config from '../config';
+import bitcoinApi from './bitcoin/bitcoin-api-factory';
+import { Common } from './common';
+import { TransactionExtended, MempoolBlockWithTransactions, AuditScore } from '../mempool.interfaces';
+import blocksRepository from '../repositories/BlocksRepository';
+import blocksAuditsRepository from '../repositories/BlocksAuditsRepository';
+import blocks from '../api/blocks';
+
+const PROPAGATION_MARGIN = 180; // in seconds, time since a transaction is first seen after which it is assumed to have propagated to all miners
+
+class Audit {
+  auditBlock(transactions: TransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: TransactionExtended })
+   : { censored: string[], added: string[], fresh: string[], score: number } {
+    if (!projectedBlocks?.[0]?.transactionIds || !mempool) {
+      return { censored: [], added: [], fresh: [], score: 0 };
+    }
+
+    const matches: string[] = []; // present in both mined block and template
+    const added: string[] = []; // present in mined block, not in template
+    const fresh: string[] = []; // missing, but firstSeen within PROPAGATION_MARGIN
+    const isCensored = {}; // missing, without excuse
+    const isDisplaced = {};
+    let displacedWeight = 0;
+
+    const inBlock = {};
+    const inTemplate = {};
+
+    const now = Math.round((Date.now() / 1000));
+    for (const tx of transactions) {
+      inBlock[tx.txid] = tx;
+    }
+    // coinbase is always expected
+    if (transactions[0]) {
+      inTemplate[transactions[0].txid] = true;
+    }
+    // look for transactions that were expected in the template, but missing from the mined block
+    for (const txid of projectedBlocks[0].transactionIds) {
+      if (!inBlock[txid]) {
+        // tx is recent, may have reached the miner too late for inclusion
+        if (mempool[txid]?.firstSeen != null && (now - (mempool[txid]?.firstSeen || 0)) <= PROPAGATION_MARGIN) {
+          fresh.push(txid);
+        } else {
+          isCensored[txid] = true;
+        }
+        displacedWeight += mempool[txid].weight;
+      }
+      inTemplate[txid] = true;
+    }
+
+    displacedWeight += (4000 - transactions[0].weight);
+
+    // we can expect an honest miner to include 'displaced' transactions in place of recent arrivals and censored txs
+    // these displaced transactions should occupy the first N weight units of the next projected block
+    let displacedWeightRemaining = displacedWeight;
+    let index = 0;
+    let lastFeeRate = Infinity;
+    let failures = 0;
+    while (projectedBlocks[1] && index < projectedBlocks[1].transactionIds.length && failures < 500) {
+      const txid = projectedBlocks[1].transactionIds[index];
+      const fits = (mempool[txid].weight - displacedWeightRemaining) < 4000;
+      const feeMatches = mempool[txid].effectiveFeePerVsize >= lastFeeRate;
+      if (fits || feeMatches) {
+        isDisplaced[txid] = true;
+        if (fits) {
+          lastFeeRate = Math.min(lastFeeRate, mempool[txid].effectiveFeePerVsize);
+        }
+        if (mempool[txid].firstSeen == null || (now - (mempool[txid]?.firstSeen || 0)) > PROPAGATION_MARGIN) {
+          displacedWeightRemaining -= mempool[txid].weight;
+        }
+        failures = 0;
+      } else {
+        failures++;
+      }
+      index++;
+    }
+
+    // mark unexpected transactions in the mined block as 'added'
+    let overflowWeight = 0;
+    let totalWeight = 0;
+    for (const tx of transactions) {
+      if (inTemplate[tx.txid]) {
+        matches.push(tx.txid);
+      } else {
+        if (!isDisplaced[tx.txid]) {
+          added.push(tx.txid);
+        } else {
+        }
+        let blockIndex = -1;
+        let index = -1;
+        projectedBlocks.forEach((block, bi) => {
+          const i = block.transactionIds.indexOf(tx.txid);
+          if (i >= 0) {
+            blockIndex = bi;
+            index = i;
+          }
+        });
+        overflowWeight += tx.weight;
+      }
+      totalWeight += tx.weight;
+    }
+
+    // transactions missing from near the end of our template are probably not being censored
+    let overflowWeightRemaining = overflowWeight - (config.MEMPOOL.BLOCK_WEIGHT_UNITS - totalWeight);
+    let maxOverflowRate = 0;
+    let rateThreshold = 0;
+    index = projectedBlocks[0].transactionIds.length - 1;
+    while (index >= 0) {
+      const txid = projectedBlocks[0].transactionIds[index];
+      if (overflowWeightRemaining > 0) {
+        if (isCensored[txid]) {
+          delete isCensored[txid];
+        }
+        if (mempool[txid].effectiveFeePerVsize > maxOverflowRate) {
+          maxOverflowRate = mempool[txid].effectiveFeePerVsize;
+          rateThreshold = (Math.ceil(maxOverflowRate * 100) / 100) + 0.005;
+        }
+      } else if (mempool[txid].effectiveFeePerVsize <= rateThreshold) { // tolerance of 0.01 sat/vb + rounding
+        if (isCensored[txid]) {
+          delete isCensored[txid];
+        }
+      }
+      overflowWeightRemaining -= (mempool[txid]?.weight || 0);
+      index--;
+    }
+
+    const numCensored = Object.keys(isCensored).length;
+    const score = matches.length > 0 ? (matches.length / (matches.length + numCensored)) : 0;
+
+    return {
+      censored: Object.keys(isCensored),
+      added,
+      fresh,
+      score
+    };
+  }
+}
+
+export default new Audit();

backend/src/api/backend-info.ts

@@ -1,46 +1,37 @@
-import * as fs from 'fs';
-import * as os from 'os';
-import logger from '../logger';
+import fs from 'fs';
+import path from 'path';
+import os from 'os';
 import { IBackendInfo } from '../mempool.interfaces';
 
 class BackendInfo {
-  private gitCommitHash = '';
-  private hostname = '';
-  private version = '';
+  private backendInfo: IBackendInfo;
 
   constructor() {
-    this.setLatestCommitHash();
-    this.setVersion();
-    this.hostname = os.hostname();
-  }
-
-  public getBackendInfo(): IBackendInfo {
-    return {
-      hostname: this.hostname,
-      gitCommit: this.gitCommitHash,
-      version: this.version,
+    // This file is created by ./fetch-version.ts during building
+    const versionFile = path.join(__dirname, 'version.json')
+    var versionInfo;
+    if (fs.existsSync(versionFile)) {
+      versionInfo = JSON.parse(fs.readFileSync(versionFile).toString());
+    } else {
+      // Use dummy values if `versionFile` doesn't exist (e.g., during testing)
+      versionInfo = {
+        version: '?',
+        gitCommit: '?'
+      };
+    }
+    this.backendInfo = {
+      hostname: os.hostname(),
+      version: versionInfo.version,
+      gitCommit: versionInfo.gitCommit
     };
   }
 
+  public getBackendInfo(): IBackendInfo {
+    return this.backendInfo;
+  }
+
   public getShortCommitHash() {
-    return this.gitCommitHash.slice(0, 7);
-  }
-
-  private setLatestCommitHash(): void {
-    try {
-      this.gitCommitHash = fs.readFileSync('../.git/refs/heads/master').toString().trim();
-    } catch (e) {
-      logger.err('Could not load git commit info: ' + (e instanceof Error ? e.message : e));
-    }
-  }
-
-  private setVersion(): void {
-    try {
-      const packageJson = fs.readFileSync('package.json').toString();
-      this.version = JSON.parse(packageJson).version;
-    } catch (e) {
-      throw new Error(e instanceof Error ? e.message : 'Error');
-    }
+    return this.backendInfo.gitCommit.slice(0, 7);
   }
 }
 

backend/src/api/bisq/bisq.routes.ts

@@ -0,0 +1,381 @@
+import { Application, Request, Response } from 'express';
+import config from '../../config';
+import { RequiredSpec } from '../../mempool.interfaces';
+import bisq from './bisq';
+import { MarketsApiError } from './interfaces';
+import marketsApi from './markets-api';
+
+class BisqRoutes {
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/stats', this.getBisqStats)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/tx/:txId', this.getBisqTransaction)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/block/:hash', this.getBisqBlock)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/blocks/tip/height', this.getBisqTip)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/blocks/:index/:length', this.getBisqBlocks)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/address/:address', this.getBisqAddress)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/txs/:index/:length', this.getBisqTransactions)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/currencies', this.getBisqMarketCurrencies.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/depth', this.getBisqMarketDepth.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/hloc', this.getBisqMarketHloc.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/markets', this.getBisqMarketMarkets.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/offers', this.getBisqMarketOffers.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/ticker', this.getBisqMarketTicker.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/trades', this.getBisqMarketTrades.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/volumes', this.getBisqMarketVolumes.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/volumes/7d', this.getBisqMarketVolumes7d.bind(this))
+    ;
+  }
+
+
+  private getBisqStats(req: Request, res: Response) {
+    const result = bisq.getStats();
+    res.json(result);
+  }
+
+  private getBisqTip(req: Request, res: Response) {
+    const result = bisq.getLatestBlockHeight();
+    res.type('text/plain');
+    res.send(result.toString());
+  }
+
+  private getBisqTransaction(req: Request, res: Response) {
+    const result = bisq.getTransaction(req.params.txId);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(404).send('Bisq transaction not found');
+    }
+  }
+
+  private getBisqTransactions(req: Request, res: Response) {
+    const types: string[] = [];
+    req.query.types = req.query.types || [];
+    if (!Array.isArray(req.query.types)) {
+      res.status(500).send('Types is not an array');
+      return;
+    }
+
+    for (const _type in req.query.types) {
+      if (typeof req.query.types[_type] === 'string') {
+        types.push(req.query.types[_type].toString());
+      }
+    }
+
+    const index = parseInt(req.params.index, 10) || 0;
+    const length = parseInt(req.params.length, 10) > 100 ? 100 : parseInt(req.params.length, 10) || 25;
+    const [transactions, count] = bisq.getTransactions(index, length, types);
+    res.header('X-Total-Count', count.toString());
+    res.json(transactions);
+  }
+
+  private getBisqBlock(req: Request, res: Response) {
+    const result = bisq.getBlock(req.params.hash);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(404).send('Bisq block not found');
+    }
+  }
+
+  private getBisqBlocks(req: Request, res: Response) {
+    const index = parseInt(req.params.index, 10) || 0;
+    const length = parseInt(req.params.length, 10) > 100 ? 100 : parseInt(req.params.length, 10) || 25;
+    const [transactions, count] = bisq.getBlocks(index, length);
+    res.header('X-Total-Count', count.toString());
+    res.json(transactions);
+  }
+
+  private getBisqAddress(req: Request, res: Response) {
+    const result = bisq.getAddress(req.params.address.substr(1));
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(404).send('Bisq address not found');
+    }
+  }
+
+  private getBisqMarketCurrencies(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'type': {
+        required: false,
+        types: ['crypto', 'fiat', 'all']
+      },
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getCurrencies(p.type);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketCurrencies error'));
+    }
+  }
+
+  private getBisqMarketDepth(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'market': {
+        required: true,
+        types: ['@string']
+      },
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getDepth(p.market);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketDepth error'));
+    }
+  }
+
+  private getBisqMarketMarkets(req: Request, res: Response) {
+    const result = marketsApi.getMarkets();
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketMarkets error'));
+    }
+  }
+
+  private getBisqMarketTrades(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'market': {
+        required: true,
+        types: ['@string']
+      },
+      'timestamp_from': {
+        required: false,
+        types: ['@number']
+      },
+      'timestamp_to': {
+        required: false,
+        types: ['@number']
+      },
+      'trade_id_to': {
+        required: false,
+        types: ['@string']
+      },
+      'trade_id_from': {
+        required: false,
+        types: ['@string']
+      },
+      'direction': {
+        required: false,
+        types: ['buy', 'sell']
+      },
+      'limit': {
+        required: false,
+        types: ['@number']
+      },
+      'sort': {
+        required: false,
+        types: ['asc', 'desc']
+      }
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getTrades(p.market, p.timestamp_from,
+      p.timestamp_to, p.trade_id_from, p.trade_id_to, p.direction, p.limit, p.sort);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketTrades error'));
+    }
+  }
+
+  private getBisqMarketOffers(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'market': {
+        required: true,
+        types: ['@string']
+      },
+      'direction': {
+        required: false,
+        types: ['buy', 'sell']
+      },
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getOffers(p.market, p.direction);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketOffers error'));
+    }
+  }
+
+  private getBisqMarketVolumes(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'market': {
+        required: false,
+        types: ['@string']
+      },
+      'interval': {
+        required: false,
+        types: ['minute', 'half_hour', 'hour', 'half_day', 'day', 'week', 'month', 'year', 'auto']
+      },
+      'timestamp_from': {
+        required: false,
+        types: ['@number']
+      },
+      'timestamp_to': {
+        required: false,
+        types: ['@number']
+      },
+      'milliseconds': {
+        required: false,
+        types: ['@boolean']
+      },
+      'timestamp': {
+        required: false,
+        types: ['no', 'yes']
+      },
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getVolumes(p.market, p.timestamp_from, p.timestamp_to, p.interval, p.milliseconds, p.timestamp);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketVolumes error'));
+    }
+  }
+
+  private getBisqMarketHloc(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'market': {
+        required: true,
+        types: ['@string']
+      },
+      'interval': {
+        required: false,
+        types: ['minute', 'half_hour', 'hour', 'half_day', 'day', 'week', 'month', 'year', 'auto']
+      },
+      'timestamp_from': {
+        required: false,
+        types: ['@number']
+      },
+      'timestamp_to': {
+        required: false,
+        types: ['@number']
+      },
+      'milliseconds': {
+        required: false,
+        types: ['@boolean']
+      },
+      'timestamp': {
+        required: false,
+        types: ['no', 'yes']
+      },
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getHloc(p.market, p.interval, p.timestamp_from, p.timestamp_to, p.milliseconds, p.timestamp);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketHloc error'));
+    }
+  }
+
+  private getBisqMarketTicker(req: Request, res: Response) {
+    const constraints: RequiredSpec = {
+      'market': {
+        required: false,
+        types: ['@string']
+      },
+    };
+
+    const p = this.parseRequestParameters(req.query, constraints);
+    if (p.error) {
+      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
+      return;
+    }
+
+    const result = marketsApi.getTicker(p.market);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketTicker error'));
+    }
+  }
+
+  private getBisqMarketVolumes7d(req: Request, res: Response) {
+    const result = marketsApi.getVolumesByTime(604800);
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketVolumes7d error'));
+    }
+  }
+
+  private parseRequestParameters(requestParams: object, params: RequiredSpec): { [name: string]: any; } {
+    const final = {};
+    for (const i in params) {
+      if (params.hasOwnProperty(i)) {
+        if (params[i].required && requestParams[i] === undefined) {
+          return { error: i + ' parameter missing'};
+        }
+        if (typeof requestParams[i] === 'string') {
+          const str = (requestParams[i] || '').toString().toLowerCase();
+          if (params[i].types.indexOf('@number') > -1) {
+            const number = parseInt((str).toString(), 10);
+            final[i] = number;
+          } else if (params[i].types.indexOf('@string') > -1) {
+            final[i] = str;
+          } else if (params[i].types.indexOf('@boolean') > -1) {
+            final[i] = str === 'true' || str === 'yes';
+          } else if (params[i].types.indexOf(str) > -1) {
+            final[i] = str;
+          } else {
+            return { error: i + ' parameter invalid'};
+          }
+        } else if (typeof requestParams[i] === 'number') {
+          final[i] = requestParams[i];
+        }
+      }
+    }
+    return final;
+  }
+
+  private getBisqMarketErrorResponse(message: string): MarketsApiError {
+    return {
+      'success': 0,
+      'error': message
+    };
+  }
+
+}
+
+export default new BisqRoutes;

backend/src/api/bisq/bisq.ts

@@ -1,10 +1,14 @@
 import config from '../../config';
 import * as fs from 'fs';
-import axios from 'axios';
+import axios, { AxiosResponse } from 'axios';
+import * as http from 'http';
+import * as https from 'https';
+import { SocksProxyAgent } from 'socks-proxy-agent';
 import { BisqBlocks, BisqBlock, BisqTransaction, BisqStats, BisqTrade } from './interfaces';
 import { Common } from '../common';
 import { BlockExtended } from '../../mempool.interfaces';
 import { StaticPool } from 'node-worker-threads-pool';
+import backendInfo from '../backend-info';
 import logger from '../../logger';
 
 class Bisq {
@@ -35,7 +39,13 @@ class Bisq {
   constructor() {}
 
   startBisqService(): void {
-    this.checkForBisqDataFolder();
+    try {
+      this.checkForBisqDataFolder();
+    } catch (e) {
+      logger.info('Retrying to start bisq service in 3 minutes');
+      setTimeout(this.startBisqService.bind(this), 180000);
+      return;
+    }
     this.loadBisqDumpFile();
     setInterval(this.updatePrice.bind(this), 1000 * 60 * 60);
     this.updatePrice();
@@ -90,7 +100,7 @@ class Bisq {
   private checkForBisqDataFolder() {
     if (!fs.existsSync(Bisq.BLOCKS_JSON_FILE_PATH)) {
       logger.warn(Bisq.BLOCKS_JSON_FILE_PATH + ` doesn't exist. Make sure Bisq is running and the config is correct before starting the server.`);
-      return process.exit(1);
+      throw new Error(`Cannot load BISQ ${Bisq.BLOCKS_JSON_FILE_PATH} file`);
     }
   }
 
@@ -137,12 +147,59 @@ class Bisq {
       }, 2000);
     });
   }
+  private async updatePrice() {
+    type axiosOptions = {
+      headers: {
+        'User-Agent': string
+      };
+      timeout: number;
+      httpAgent?: http.Agent;
+      httpsAgent?: https.Agent;
+    }
+    const setDelay = (secs: number = 1): Promise<void> => new Promise(resolve => setTimeout(() => resolve(), secs * 1000));
+    const BISQ_URL = (config.SOCKS5PROXY.ENABLED === true) && (config.SOCKS5PROXY.USE_ONION === true) ? config.EXTERNAL_DATA_SERVER.BISQ_ONION : config.EXTERNAL_DATA_SERVER.BISQ_URL;
+    const isHTTP = (new URL(BISQ_URL).protocol.split(':')[0] === 'http') ? true : false;
+    const axiosOptions: axiosOptions = {
+      headers: {
+        'User-Agent': (config.MEMPOOL.USER_AGENT === 'mempool') ? `mempool/v${backendInfo.getBackendInfo().version}` : `${config.MEMPOOL.USER_AGENT}`
+      },
+      timeout: config.SOCKS5PROXY.ENABLED ? 30000 : 10000
+    };
+    let retry = 0;
 
-  private updatePrice() {
-    axios.get<BisqTrade[]>('https://bisq.markets/api/trades/?market=bsq_btc', { timeout: 10000 })
-      .then((response) => {
+    while(retry < config.MEMPOOL.EXTERNAL_MAX_RETRY) {
+      try {
+        if (config.SOCKS5PROXY.ENABLED) {
+          const socksOptions: any = {
+            agentOptions: {
+              keepAlive: true,
+            },
+            hostname: config.SOCKS5PROXY.HOST,
+            port: config.SOCKS5PROXY.PORT
+          };
+
+          if (config.SOCKS5PROXY.USERNAME && config.SOCKS5PROXY.PASSWORD) {
+            socksOptions.username = config.SOCKS5PROXY.USERNAME;
+            socksOptions.password = config.SOCKS5PROXY.PASSWORD;
+          } else {
+            // Retry with different tor circuits https://stackoverflow.com/a/64960234
+            socksOptions.username = `circuit${retry}`;
+          }
+
+          // Handle proxy agent for onion addresses
+          if (isHTTP) {
+            axiosOptions.httpAgent = new SocksProxyAgent(socksOptions);
+          } else {
+            axiosOptions.httpsAgent = new SocksProxyAgent(socksOptions);
+          }
+        }
+        
+        const data: AxiosResponse = await axios.get(`${BISQ_URL}/trades/?market=bsq_btc`, axiosOptions);
+        if (data.statusText === 'error' || !data.data) {
+          throw new Error(`Could not fetch data from Bisq market, Error: ${data.status}`);
+        }
         const prices: number[] = [];
-        response.data.forEach((trade) => {
+        data.data.forEach((trade) => {
           prices.push(parseFloat(trade.price) * 100000000);
         });
         prices.sort((a, b) => a - b);
@@ -150,19 +207,24 @@ class Bisq {
         if (this.priceUpdateCallbackFunction) {
           this.priceUpdateCallbackFunction(this.price);
         }
-    }).catch((err) => {
-      logger.err('Error updating Bisq market price: ' + err);
-    });
+        logger.debug('Successfully updated Bisq market price');
+        break;
+      } catch (e) {
+        logger.err('Error updating Bisq market price: '  + (e instanceof Error ? e.message : e));
+        await setDelay(config.MEMPOOL.EXTERNAL_RETRY_INTERVAL);
+        retry++;
+      }
+    }
   }
 
   private async loadBisqDumpFile(): Promise<void> {
+    this.allBlocks = [];
     try {
-      const data = await this.loadData();
-      await this.loadBisqBlocksDump(data);
+      await this.loadData();
       this.buildIndex();
       this.calculateStats();
     } catch (e) {
-      logger.info('loadBisqDumpFile() error.' + (e instanceof Error ? e.message : e));
+      logger.info('Cannot load bisq dump file because: ' + (e instanceof Error ? e.message : e));
     }
   }
 
@@ -241,36 +303,61 @@ class Bisq {
     };
   }
 
-  private async loadBisqBlocksDump(cacheData: string): Promise<void> {
-    const start = new Date().getTime();
-    if (cacheData && cacheData.length !== 0) {
-      logger.debug('Processing Bisq data dump...');
-      const data: BisqBlocks = await this.jsonParsePool.exec(cacheData);
-      if (data.blocks && data.blocks.length !== this.allBlocks.length) {
-        this.allBlocks = data.blocks;
-        this.allBlocks.reverse();
-        this.blocks = this.allBlocks.filter((block) => block.txs.length > 0);
-        this.latestBlockHeight = data.chainHeight;
-        const time = new Date().getTime() - start;
-        logger.debug('Bisq dump processed in ' + time + ' ms (worker thread)');
-      } else {
-        throw new Error(`Bisq dump didn't contain any blocks`);
-      }
+  private async loadData(): Promise<any> {
+    if (!fs.existsSync(Bisq.BLOCKS_JSON_FILE_PATH)) {
+      throw new Error(Bisq.BLOCKS_JSON_FILE_PATH + ` doesn't exist`);
     }
-  }
 
-  private loadData(): Promise<string> {
-    return new Promise((resolve, reject) => {
-      if (!fs.existsSync(Bisq.BLOCKS_JSON_FILE_PATH)) {
-        return reject(Bisq.BLOCKS_JSON_FILE_PATH + ` doesn't exist`);
-      }
-      fs.readFile(Bisq.BLOCKS_JSON_FILE_PATH, 'utf8', (err, data) => {
-        if (err) {
-          reject(err);
-        }
-        resolve(data);
-      });
+    const readline = require('readline');
+    const events = require('events');
+
+    const rl = readline.createInterface({
+      input: fs.createReadStream(Bisq.BLOCKS_JSON_FILE_PATH),
+      crlfDelay: Infinity
     });
+
+    let blockBuffer = '';
+    let readingBlock = false;
+    let lineCount = 1;
+    const start = new Date().getTime();
+
+    logger.debug('Processing Bisq data dump...');
+
+    rl.on('line', (line) => {
+      if (lineCount === 2) {
+        line = line.replace('  "chainHeight": ', '');
+        this.latestBlockHeight = parseInt(line, 10);
+      }
+
+      if (line === '    {') {
+        readingBlock = true;
+      } else if (line === '    },') {
+        blockBuffer += '}';
+        try {
+          const block: BisqBlock =  JSON.parse(blockBuffer);
+          this.allBlocks.push(block);
+          readingBlock = false;
+          blockBuffer = '';
+        } catch (e) {
+          logger.debug(blockBuffer);
+          throw Error(`Unable to parse Bisq data dump at line ${lineCount}` + (e instanceof Error ? e.message : e));
+        }
+      }
+
+      if (readingBlock === true) {
+        blockBuffer += line;
+      }
+
+      ++lineCount;
+    });
+
+    await events.once(rl, 'close');
+
+    this.allBlocks.reverse();
+    this.blocks = this.allBlocks.filter((block) => block.txs.length > 0);
+
+    const time = new Date().getTime() - start;
+    logger.debug('Bisq dump processed in ' + time + ' ms');
   }
 }
 

backend/src/api/bisq/markets-api.ts

@@ -1,7 +1,7 @@
 import { Currencies, OffersData, TradesData, Depth, Currency, Interval, HighLowOpenClose,
   Markets, Offers, Offer, BisqTrade, MarketVolume, Tickers, Ticker, SummarizedIntervals, SummarizedInterval } from './interfaces';
 
-import * as datetime from 'locutus/php/datetime';
+const strtotime = require('./strtotime');
 
 class BisqMarketsApi {
   private cryptoCurrencyData: Currency[] = [];
@@ -312,7 +312,7 @@ class BisqMarketsApi {
 
   getTickerFromMarket(market: string): Ticker | null {
     let ticker: Ticker;
-    const timestamp_from = datetime.strtotime('-24 hour');
+    const timestamp_from = strtotime('-24 hour');
     const timestamp_to = new Date().getTime() / 1000;
     const trades = this.getTradesByCriteria(market, timestamp_to, timestamp_from,
       undefined, undefined, undefined, 'asc', Number.MAX_SAFE_INTEGER);
@@ -638,13 +638,13 @@ class BisqMarketsApi {
         case 'half_day':
             return (ts - (ts % (3600 * 12)));
         case 'day':
-            return datetime.strtotime('midnight today', ts);
+            return strtotime('midnight today', ts);
         case 'week':
-            return datetime.strtotime('midnight sunday last week', ts);
+            return strtotime('midnight sunday last week', ts);
         case 'month':
-            return datetime.strtotime('midnight first day of this month', ts);
+            return strtotime('midnight first day of this month', ts);
         case 'year':
-            return datetime.strtotime('midnight first day of january', ts);
+            return strtotime('midnight first day of january', ts);
         default:
             throw new Error('Unsupported interval: ' + interval);
     }

backend/src/api/bisq/markets.ts

@@ -26,7 +26,13 @@ class Bisq {
   constructor() {}
 
   startBisqService(): void {
-    this.checkForBisqDataFolder();
+    try {
+      this.checkForBisqDataFolder();
+    } catch (e) {
+      logger.info('Retrying to start bisq service (markets) in 3 minutes');
+      setTimeout(this.startBisqService.bind(this), 180000);
+      return;
+    }
     this.loadBisqDumpFile();
     this.startBisqDirectoryWatcher();
   }
@@ -34,7 +40,7 @@ class Bisq {
   private checkForBisqDataFolder() {
     if (!fs.existsSync(Bisq.MARKET_JSON_PATH + Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency)) {
       logger.err(Bisq.MARKET_JSON_PATH + Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency + ` doesn't exist. Make sure Bisq is running and the config is correct before starting the server.`);
-      return process.exit(1);
+      throw new Error(`Cannot load BISQ ${Bisq.MARKET_JSON_FILE_PATHS.cryptoCurrency} file`);
     }
   }
 

backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts

@@ -2,16 +2,22 @@ import { IEsploraApi } from './esplora-api.interface';
 
 export interface AbstractBitcoinApi {
   $getRawMempool(): Promise<IEsploraApi.Transaction['txid'][]>;
-  $getRawTransaction(txId: string, skipConversion?: boolean, addPrevout?: boolean): Promise<IEsploraApi.Transaction>;
+  $getRawTransaction(txId: string, skipConversion?: boolean, addPrevout?: boolean, lazyPrevouts?: boolean): Promise<IEsploraApi.Transaction>;
+  $getTransactionHex(txId: string): Promise<string>;
   $getBlockHeightTip(): Promise<number>;
+  $getBlockHashTip(): Promise<string>;
   $getTxIdsForBlock(hash: string): Promise<string[]>;
   $getBlockHash(height: number): Promise<string>;
   $getBlockHeader(hash: string): Promise<string>;
   $getBlock(hash: string): Promise<IEsploraApi.Block>;
+  $getRawBlock(hash: string): Promise<Buffer>;
   $getAddress(address: string): Promise<IEsploraApi.Address>;
   $getAddressTransactions(address: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]>;
   $getAddressPrefix(prefix: string): string[];
   $sendRawTransaction(rawTransaction: string): Promise<string>;
+  $getOutspend(txId: string, vout: number): Promise<IEsploraApi.Outspend>;
+  $getOutspends(txId: string): Promise<IEsploraApi.Outspend[]>;
+  $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]>;
 }
 export interface BitcoinRpcCredentials {
   host: string;

backend/src/api/bitcoin/bitcoin-api.interface.ts

@@ -4,6 +4,7 @@ export namespace IBitcoinApi {
     size: number;                    //  (numeric) Current tx count
     bytes: number;                   //  (numeric) Sum of all virtual transaction sizes as defined in BIP 141.
     usage: number;                   //  (numeric) Total memory usage for the mempool
+    total_fee: number;               //  (numeric) Total fees of transactions in the mempool
     maxmempool: number;              //  (numeric) Maximum memory usage for the mempool
     mempoolminfee: number;           //  (numeric) Minimum fee rate in BTC/kB for tx to be accepted.
     minrelaytxfee: number;           //  (numeric) Current minimum relay fee for transactions
@@ -72,6 +73,14 @@ export namespace IBitcoinApi {
     time: number;                    //  (numeric) Same as blocktime
   }
 
+  export interface VerboseBlock extends Block {
+    tx: VerboseTransaction[];        // The transactions in the format of the getrawtransaction RPC. Different from verbosity = 1 "tx" result
+  }
+
+  export interface VerboseTransaction extends Transaction {
+    fee?: number;                   //  (numeric) The transaction fee in BTC, omitted if block undo data is not available
+  }
+
   export interface Vin {
     txid?: string;                   //  (string) The transaction id
     vout?: number;                   //  (string)

backend/src/api/bitcoin/bitcoin-api.ts

@@ -14,33 +14,66 @@ class BitcoinApi implements AbstractBitcoinApi {
     this.bitcoindClient = bitcoinClient;
   }
 
-  $getRawTransaction(txId: string, skipConversion = false, addPrevout = false): Promise<IEsploraApi.Transaction> {
+  static convertBlock(block: IBitcoinApi.Block): IEsploraApi.Block {
+    return {
+      id: block.hash,
+      height: block.height,
+      version: block.version,
+      timestamp: block.time,
+      bits: parseInt(block.bits, 16),
+      nonce: block.nonce,
+      difficulty: block.difficulty,
+      merkle_root: block.merkleroot,
+      tx_count: block.nTx,
+      size: block.size,
+      weight: block.weight,
+      previousblockhash: block.previousblockhash,
+    };
+  }
+
+
+  $getRawTransaction(txId: string, skipConversion = false, addPrevout = false, lazyPrevouts = false): Promise<IEsploraApi.Transaction> {
     // If the transaction is in the mempool we already converted and fetched the fee. Only prevouts are missing
     const txInMempool = mempool.getMempool()[txId];
     if (txInMempool && addPrevout) {
       return this.$addPrevouts(txInMempool);
     }
 
-    // Special case to fetch the Coinbase transaction
-    if (txId === '4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b') {
-      return this.$returnCoinbaseTransaction();
-    }
-
     return this.bitcoindClient.getRawTransaction(txId, true)
       .then((transaction: IBitcoinApi.Transaction) => {
         if (skipConversion) {
           transaction.vout.forEach((vout) => {
-            vout.value = vout.value * 100000000;
+            vout.value = Math.round(vout.value * 100000000);
           });
           return transaction;
         }
-        return this.$convertTransaction(transaction, addPrevout);
+        return this.$convertTransaction(transaction, addPrevout, lazyPrevouts);
+      })
+      .catch((e: Error) => {
+        if (e.message.startsWith('The genesis block coinbase')) {
+          return this.$returnCoinbaseTransaction();
+        }
+        throw e;
       });
   }
 
+  $getTransactionHex(txId: string): Promise<string> {
+    return this.$getRawTransaction(txId, true)
+      .then((tx) => tx.hex || '');
+  }
+
   $getBlockHeightTip(): Promise<number> {
     return this.bitcoindClient.getChainTips()
-      .then((result: IBitcoinApi.ChainTips[]) => result[0].height);
+      .then((result: IBitcoinApi.ChainTips[]) => {
+        return result.find(tip => tip.status === 'active')!.height;
+      });
+  }
+
+  $getBlockHashTip(): Promise<string> {
+    return this.bitcoindClient.getChainTips()
+      .then((result: IBitcoinApi.ChainTips[]) => {
+        return result.find(tip => tip.status === 'active')!.hash;
+      });
   }
 
   $getTxIdsForBlock(hash: string): Promise<string[]> {
@@ -48,8 +81,9 @@ class BitcoinApi implements AbstractBitcoinApi {
       .then((rpcBlock: IBitcoinApi.Block) => rpcBlock.tx);
   }
 
-  $getRawBlock(hash: string): Promise<string> {
-    return this.bitcoindClient.getBlock(hash, 0);
+  $getRawBlock(hash: string): Promise<Buffer> {
+    return this.bitcoindClient.getBlock(hash, 0)
+      .then((raw: string) => Buffer.from(raw, "hex"));
   }
 
   $getBlockHash(height: number): Promise<string> {
@@ -67,7 +101,7 @@ class BitcoinApi implements AbstractBitcoinApi {
     }
 
     return this.bitcoindClient.getBlock(hash)
-      .then((block: IBitcoinApi.Block) => this.convertBlock(block));
+      .then((block: IBitcoinApi.Block) => BitcoinApi.convertBlock(block));
   }
 
   $getAddress(address: string): Promise<IEsploraApi.Address> {
@@ -83,26 +117,68 @@ class BitcoinApi implements AbstractBitcoinApi {
   }
 
   $getAddressPrefix(prefix: string): string[] {
-    const found: string[] = [];
+    const found: { [address: string]: string } = {};
     const mp = mempool.getMempool();
     for (const tx in mp) {
       for (const vout of mp[tx].vout) {
         if (vout.scriptpubkey_address.indexOf(prefix) === 0) {
-          found.push(vout.scriptpubkey_address);
-          if (found.length >= 10) {
-            return found;
+          found[vout.scriptpubkey_address] = '';
+          if (Object.keys(found).length >= 10) {
+            return Object.keys(found);
           }
         }
       }
     }
-    return found;
+    return Object.keys(found);
   }
 
   $sendRawTransaction(rawTransaction: string): Promise<string> {
     return this.bitcoindClient.sendRawTransaction(rawTransaction);
   }
 
-  protected async $convertTransaction(transaction: IBitcoinApi.Transaction, addPrevout: boolean): Promise<IEsploraApi.Transaction> {
+  async $getOutspend(txId: string, vout: number): Promise<IEsploraApi.Outspend> {
+    const txOut = await this.bitcoindClient.getTxOut(txId, vout, false);
+    return {
+      spent: txOut === null,
+      status: {
+        confirmed: true,
+      }
+    };
+  }
+
+  async $getOutspends(txId: string): Promise<IEsploraApi.Outspend[]> {
+    const outSpends: IEsploraApi.Outspend[] = [];
+    const tx = await this.$getRawTransaction(txId, true, false);
+    for (let i = 0; i < tx.vout.length; i++) {
+      if (tx.status && tx.status.block_height === 0) {
+        outSpends.push({
+          spent: false
+        });
+      } else {
+        const txOut = await this.bitcoindClient.getTxOut(txId, i);
+        outSpends.push({
+          spent: txOut === null,
+        });
+      }
+    }
+    return outSpends;
+  }
+
+  async $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]> {
+    const outspends: IEsploraApi.Outspend[][] = [];
+    for (const tx of txId) {
+      const outspend = await this.$getOutspends(tx);
+      outspends.push(outspend);
+    }
+    return outspends;
+  }
+
+  $getEstimatedHashrate(blockHeight: number): Promise<number> {
+    // 120 is the default block span in Core
+    return this.bitcoindClient.getNetworkHashPs(120, blockHeight);
+  }
+
+  protected async $convertTransaction(transaction: IBitcoinApi.Transaction, addPrevout: boolean, lazyPrevouts = false): Promise<IEsploraApi.Transaction> {
     let esploraTransaction: IEsploraApi.Transaction = {
       txid: transaction.txid,
       version: transaction.version,
@@ -117,11 +193,11 @@ class BitcoinApi implements AbstractBitcoinApi {
 
     esploraTransaction.vout = transaction.vout.map((vout) => {
       return {
-        value: vout.value * 100000000,
+        value: Math.round(vout.value * 100000000),
         scriptpubkey: vout.scriptPubKey.hex,
         scriptpubkey_address: vout.scriptPubKey && vout.scriptPubKey.address ? vout.scriptPubKey.address
           : vout.scriptPubKey.addresses ? vout.scriptPubKey.addresses[0] : '',
-        scriptpubkey_asm: vout.scriptPubKey.asm ? this.convertScriptSigAsm(vout.scriptPubKey.asm) : '',
+        scriptpubkey_asm: vout.scriptPubKey.asm ? this.convertScriptSigAsm(vout.scriptPubKey.hex) : '',
         scriptpubkey_type: this.translateScriptPubKeyType(vout.scriptPubKey.type),
       };
     });
@@ -131,11 +207,13 @@ class BitcoinApi implements AbstractBitcoinApi {
         is_coinbase: !!vin.coinbase,
         prevout: null,
         scriptsig: vin.scriptSig && vin.scriptSig.hex || vin.coinbase || '',
-        scriptsig_asm: vin.scriptSig && this.convertScriptSigAsm(vin.scriptSig.asm) || '',
+        scriptsig_asm: vin.scriptSig && this.convertScriptSigAsm(vin.scriptSig.hex) || '',
         sequence: vin.sequence,
         txid: vin.txid || '',
         vout: vin.vout || 0,
-        witness: vin.txinwitness,
+        witness: vin.txinwitness || [],
+        inner_redeemscript_asm: '',
+        inner_witnessscript_asm: '',
       };
     });
 
@@ -148,35 +226,15 @@ class BitcoinApi implements AbstractBitcoinApi {
       };
     }
 
-    if (transaction.confirmations) {
-      esploraTransaction = await this.$calculateFeeFromInputs(esploraTransaction, addPrevout);
-    } else {
+    if (addPrevout) {
+      esploraTransaction = await this.$calculateFeeFromInputs(esploraTransaction, false, lazyPrevouts);
+    } else if (!transaction.confirmations) {
       esploraTransaction = await this.$appendMempoolFeeData(esploraTransaction);
-      if (addPrevout) {
-        esploraTransaction = await this.$calculateFeeFromInputs(esploraTransaction, addPrevout);
-      }
     }
 
     return esploraTransaction;
   }
 
-  private convertBlock(block: IBitcoinApi.Block): IEsploraApi.Block {
-    return {
-      id: block.hash,
-      height: block.height,
-      version: block.version,
-      timestamp: block.time,
-      bits: parseInt(block.bits, 16),
-      nonce: block.nonce,
-      difficulty: block.difficulty,
-      merkle_root: block.merkleroot,
-      tx_count: block.nTx,
-      size: block.size,
-      weight: block.weight,
-      previousblockhash: block.previousblockhash,
-    };
-  }
-
   private translateScriptPubKeyType(outputType: string): string {
     const map = {
       'pubkey': 'p2pk',
@@ -186,13 +244,14 @@ class BitcoinApi implements AbstractBitcoinApi {
       'witness_v0_scripthash': 'v0_p2wsh',
       'witness_v1_taproot': 'v1_p2tr',
       'nonstandard': 'nonstandard',
+      'multisig': 'multisig',
       'nulldata': 'op_return'
     };
 
     if (map[outputType]) {
       return map[outputType];
     } else {
-      return '';
+      return 'unknown';
     }
   }
 
@@ -209,7 +268,7 @@ class BitcoinApi implements AbstractBitcoinApi {
     } else {
       mempoolEntry = await this.$getMempoolEntry(transaction.txid);
     }
-    transaction.fee = mempoolEntry.fees.base * 100000000;
+    transaction.fee = Math.round(mempoolEntry.fees.base * 100000000);
     return transaction;
   }
 
@@ -218,7 +277,7 @@ class BitcoinApi implements AbstractBitcoinApi {
       if (vin.prevout) {
         continue;
       }
-      const innerTx = await this.$getRawTransaction(vin.txid, false);
+      const innerTx = await this.$getRawTransaction(vin.txid, false, false);
       vin.prevout = innerTx.vout[vin.vout];
       this.addInnerScriptsToVin(vin);
     }
@@ -226,12 +285,14 @@ class BitcoinApi implements AbstractBitcoinApi {
   }
 
   protected $returnCoinbaseTransaction(): Promise<IEsploraApi.Transaction> {
-    return this.bitcoindClient.getBlock('000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f', 2)
-      .then((block: IBitcoinApi.Block) => {
-        return this.$convertTransaction(Object.assign(block.tx[0], {
-          confirmations: blocks.getCurrentBlockHeight() + 1,
-          blocktime: 1231006505 }), false);
-      });
+    return this.bitcoindClient.getBlockHash(0).then((hash: string) =>
+      this.bitcoindClient.getBlock(hash, 2)
+        .then((block: IBitcoinApi.Block) => {
+          return this.$convertTransaction(Object.assign(block.tx[0], {
+            confirmations: blocks.getCurrentBlockHeight() + 1,
+            blocktime: block.time }), false);
+        })
+    );
   }
 
   private $getMempoolEntry(txid: string): Promise<IBitcoinApi.MempoolEntry> {
@@ -242,42 +303,95 @@ class BitcoinApi implements AbstractBitcoinApi {
     return this.bitcoindClient.getRawMemPool(true);
   }
 
-  private async $calculateFeeFromInputs(transaction: IEsploraApi.Transaction, addPrevout: boolean): Promise<IEsploraApi.Transaction> {
+
+  private async $calculateFeeFromInputs(transaction: IEsploraApi.Transaction, addPrevout: boolean, lazyPrevouts: boolean): Promise<IEsploraApi.Transaction> {
     if (transaction.vin[0].is_coinbase) {
       transaction.fee = 0;
       return transaction;
     }
     let totalIn = 0;
-    for (const vin of transaction.vin) {
-      const innerTx = await this.$getRawTransaction(vin.txid, !addPrevout);
-      if (addPrevout) {
-        vin.prevout = innerTx.vout[vin.vout];
-        this.addInnerScriptsToVin(vin);
+
+    for (let i = 0; i < transaction.vin.length; i++) {
+      if (lazyPrevouts && i > 12) {
+        transaction.vin[i].lazy = true;
+        continue;
       }
-      totalIn += innerTx.vout[vin.vout].value;
+      const innerTx = await this.$getRawTransaction(transaction.vin[i].txid, false, false);
+      transaction.vin[i].prevout = innerTx.vout[transaction.vin[i].vout];
+      this.addInnerScriptsToVin(transaction.vin[i]);
+      totalIn += innerTx.vout[transaction.vin[i].vout].value;
+    }
+    if (lazyPrevouts && transaction.vin.length > 12) {
+      transaction.fee = -1;
+    } else {
+      const totalOut = transaction.vout.reduce((p, output) => p + output.value, 0);
+      transaction.fee = parseFloat((totalIn - totalOut).toFixed(8));
     }
-    const totalOut = transaction.vout.reduce((p, output) => p + output.value, 0);
-    transaction.fee = parseFloat((totalIn - totalOut).toFixed(8));
     return transaction;
   }
 
-  private convertScriptSigAsm(str: string): string {
-    const a = str.split(' ');
+  private convertScriptSigAsm(hex: string): string {
+    const buf = Buffer.from(hex, 'hex');
+
     const b: string[] = [];
-    a.forEach((chunk) => {
-      if (chunk.substr(0, 3) === 'OP_') {
-        chunk = chunk.replace(/^OP_(\d+)/, 'OP_PUSHNUM_$1');
-        chunk = chunk.replace('OP_CHECKSEQUENCEVERIFY', 'OP_CSV');
-        b.push(chunk);
-      } else {
-        chunk = chunk.replace('[ALL]', '01');
-        if (chunk === '0') {
-          b.push('OP_0');
+
+    let i = 0;
+    while (i < buf.length) {
+      const op = buf[i];
+      if (op >= 0x01 && op <= 0x4e) {
+        i++;
+        let push: number;
+        if (op === 0x4c) {
+          push = buf.readUInt8(i);
+          b.push('OP_PUSHDATA1');
+          i += 1;
+        } else if (op === 0x4d) {
+          push = buf.readUInt16LE(i);
+          b.push('OP_PUSHDATA2');
+          i += 2;
+        } else if (op === 0x4e) {
+          push = buf.readUInt32LE(i);
+          b.push('OP_PUSHDATA4');
+          i += 4;
         } else {
-          b.push('OP_PUSHBYTES_' + Math.round(chunk.length / 2) + ' ' + chunk);
+          push = op;
+          b.push('OP_PUSHBYTES_' + push);
         }
+
+        const data = buf.slice(i, i + push);
+        if (data.length !== push) {
+          break;
+        }
+
+        b.push(data.toString('hex'));
+        i += data.length;
+      } else {
+        if (op === 0x00) {
+          b.push('OP_0');
+        } else if (op === 0x4f) {
+          b.push('OP_PUSHNUM_NEG1');
+        } else if (op === 0xb1) {
+          b.push('OP_CLTV');
+        } else if (op === 0xb2) {
+          b.push('OP_CSV');
+        } else if (op === 0xba) {
+          b.push('OP_CHECKSIGADD');
+        } else {
+          const opcode = bitcoinjs.script.toASM([ op ]);
+          if (opcode && op < 0xfd) {
+            if (/^OP_(\d+)$/.test(opcode)) {
+              b.push(opcode.replace(/^OP_(\d+)$/, 'OP_PUSHNUM_$1'));
+            } else {
+              b.push(opcode);
+            }
+          } else {
+            b.push('OP_RETURN_' + op);
+          }
+        }
+        i += 1;
       }
-    });
+    }
+
     return b.join(' ');
   }
 
@@ -288,21 +402,21 @@ class BitcoinApi implements AbstractBitcoinApi {
 
     if (vin.prevout.scriptpubkey_type === 'p2sh') {
       const redeemScript = vin.scriptsig_asm.split(' ').reverse()[0];
-      vin.inner_redeemscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(redeemScript, 'hex')));
+      vin.inner_redeemscript_asm = this.convertScriptSigAsm(redeemScript);
       if (vin.witness && vin.witness.length > 2) {
         const witnessScript = vin.witness[vin.witness.length - 1];
-        vin.inner_witnessscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(witnessScript, 'hex')));
+        vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
       }
     }
 
     if (vin.prevout.scriptpubkey_type === 'v0_p2wsh' && vin.witness) {
       const witnessScript = vin.witness[vin.witness.length - 1];
-      vin.inner_witnessscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(witnessScript, 'hex')));
+      vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
     }
 
     if (vin.prevout.scriptpubkey_type === 'v1_p2tr' && vin.witness && vin.witness.length > 1) {
       const witnessScript = vin.witness[vin.witness.length - 2];
-      vin.inner_witnessscript_asm = this.convertScriptSigAsm(bitcoinjs.script.toASM(Buffer.from(witnessScript, 'hex')));
+      vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
     }
   }
 

backend/src/api/bitcoin/bitcoin-client.ts

@@ -1,5 +1,5 @@
 import config from '../../config';
-import * as bitcoin from '@mempool/bitcoin';
+const bitcoin = require('../../rpc-api/index');
 import { BitcoinRpcCredentials } from './bitcoin-api-abstract-factory';
 
 const nodeRpcCredentials: BitcoinRpcCredentials = {

backend/src/api/bitcoin/bitcoin-second-client.ts

@@ -1,5 +1,5 @@
 import config from '../../config';
-import * as bitcoin from '@mempool/bitcoin';
+const bitcoin = require('../../rpc-api/index');
 import { BitcoinRpcCredentials } from './bitcoin-api-abstract-factory';
 
 const nodeRpcCredentials: BitcoinRpcCredentials = {

backend/src/api/bitcoin/bitcoin.routes.ts

@@ -0,0 +1,648 @@
+import { Application, Request, Response } from 'express';
+import axios from 'axios';
+import * as bitcoinjs from 'bitcoinjs-lib';
+import config from '../../config';
+import websocketHandler from '../websocket-handler';
+import mempool from '../mempool';
+import feeApi from '../fee-api';
+import mempoolBlocks from '../mempool-blocks';
+import bitcoinApi from './bitcoin-api-factory';
+import { Common } from '../common';
+import backendInfo from '../backend-info';
+import transactionUtils from '../transaction-utils';
+import { IEsploraApi } from './esplora-api.interface';
+import loadingIndicators from '../loading-indicators';
+import { TransactionExtended } from '../../mempool.interfaces';
+import logger from '../../logger';
+import blocks from '../blocks';
+import bitcoinClient from './bitcoin-client';
+import difficultyAdjustment from '../difficulty-adjustment';
+import transactionRepository from '../../repositories/TransactionRepository';
+
+class BitcoinRoutes {
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'transaction-times', this.getTransactionTimes)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'outspends', this.$getBatchedOutspends)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'cpfp/:txId', this.$getCpfpInfo)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'difficulty-adjustment', this.getDifficultyChange)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'fees/recommended', this.getRecommendedFees)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'fees/mempool-blocks', this.getMempoolBlocks)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'backend-info', this.getBackendInfo)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'init-data', this.getInitData)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'validate-address/:address', this.validateAddress)
+      .post(config.MEMPOOL.API_URL_PREFIX + 'tx/push', this.$postTransactionForm)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'donations', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/donations`, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'donations/images/:id', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/donations/images/${req.params.id}`, {
+            responseType: 'stream', timeout: 10000
+          });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/contributors`, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors/images/:id', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/contributors/images/${req.params.id}`, {
+            responseType: 'stream', timeout: 10000
+          });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'translators', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/translators`, { responseType: 'stream', timeout: 10000 });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'translators/images/:id', async (req, res) => {
+        try {
+          const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.MEMPOOL_API}/translators/images/${req.params.id}`, {
+            responseType: 'stream', timeout: 10000
+          });
+          response.data.pipe(res);
+        } catch (e) {
+          res.status(500).end();
+        }
+      })
+      .get(config.MEMPOOL.API_URL_PREFIX + 'blocks', this.getBlocks.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/:height', this.getBlocks.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash', this.getBlock)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/summary', this.getStrippedBlockTransactions)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/audit-summary', this.getBlockAuditSummary)
+      .post(config.MEMPOOL.API_URL_PREFIX + 'psbt/addparents', this.postPsbtCompletion)
+      ;
+
+      if (config.MEMPOOL.BACKEND !== 'esplora') {
+        app
+          .get(config.MEMPOOL.API_URL_PREFIX + 'mempool', this.getMempool)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'mempool/txids', this.getMempoolTxIds)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'mempool/recent', this.getRecentMempoolTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId', this.getTransaction)
+          .post(config.MEMPOOL.API_URL_PREFIX + 'tx', this.$postTransaction)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/hex', this.getRawTransaction)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/status', this.getTransactionStatus)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/outspends', this.getTransactionOutspends)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/header', this.getBlockHeader)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/height', this.getBlockTipHeight)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/hash', this.getBlockTipHash)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/raw', this.getRawBlock)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/txids', this.getTxIdsForBlock)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/txs', this.getBlockTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/txs/:index', this.getBlockTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'block-height/:height', this.getBlockHeight)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address', this.getAddress)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address/txs', this.getAddressTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address/txs/chain/:txId', this.getAddressTransactions)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'address-prefix/:prefix', this.getAddressPrefix)
+          ;
+      }
+  }
+
+
+  private getInitData(req: Request, res: Response) {
+    try {
+      const result = websocketHandler.getInitData();
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private getRecommendedFees(req: Request, res: Response) {
+    if (!mempool.isInSync()) {
+      res.statusCode = 503;
+      res.send('Service Unavailable');
+      return;
+    }
+    const result = feeApi.getRecommendedFee();
+    res.json(result);
+  }
+
+  private getMempoolBlocks(req: Request, res: Response) {
+    try {
+      const result = mempoolBlocks.getMempoolBlocks();
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private getTransactionTimes(req: Request, res: Response) {
+    if (!Array.isArray(req.query.txId)) {
+      res.status(500).send('Not an array');
+      return;
+    }
+    const txIds: string[] = [];
+    for (const _txId in req.query.txId) {
+      if (typeof req.query.txId[_txId] === 'string') {
+        txIds.push(req.query.txId[_txId].toString());
+      }
+    }
+
+    const times = mempool.getFirstSeenForTransactions(txIds);
+    res.json(times);
+  }
+
+  private async $getBatchedOutspends(req: Request, res: Response) {
+    if (!Array.isArray(req.query.txId)) {
+      res.status(500).send('Not an array');
+      return;
+    }
+    if (req.query.txId.length > 50) {
+      res.status(400).send('Too many txids requested');
+      return;
+    }
+    const txIds: string[] = [];
+    for (const _txId in req.query.txId) {
+      if (typeof req.query.txId[_txId] === 'string') {
+        txIds.push(req.query.txId[_txId].toString());
+      }
+    }
+
+    try {
+      const batchedOutspends = await bitcoinApi.$getBatchedOutspends(txIds);
+      res.json(batchedOutspends);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getCpfpInfo(req: Request, res: Response) {
+    if (!/^[a-fA-F0-9]{64}$/.test(req.params.txId)) {
+      res.status(501).send(`Invalid transaction ID.`);
+      return;
+    }
+
+    const tx = mempool.getMempool()[req.params.txId];
+    if (tx) {
+      if (tx?.cpfpChecked) {
+        res.json({
+          ancestors: tx.ancestors,
+          bestDescendant: tx.bestDescendant || null,
+          descendants: tx.descendants || null,
+          effectiveFeePerVsize: tx.effectiveFeePerVsize || null,
+        });
+        return;
+      }
+
+      const cpfpInfo = Common.setRelativesAndGetCpfpInfo(tx, mempool.getMempool());
+
+      res.json(cpfpInfo);
+      return;
+    } else {
+      const cpfpInfo = await transactionRepository.$getCpfpInfo(req.params.txId);
+      if (cpfpInfo) {
+        res.json(cpfpInfo);
+        return;
+      }
+    }
+    res.status(404).send(`Transaction has no CPFP info available.`);
+  }
+
+  private getBackendInfo(req: Request, res: Response) {
+    res.json(backendInfo.getBackendInfo());
+  }
+
+  private async getTransaction(req: Request, res: Response) {
+    try {
+      const transaction = await transactionUtils.$getTransactionExtended(req.params.txId, true);
+      res.json(transaction);
+    } catch (e) {
+      let statusCode = 500;
+      if (e instanceof Error && e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
+        statusCode = 404;
+      }
+      res.status(statusCode).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getRawTransaction(req: Request, res: Response) {
+    try {
+      const transaction: IEsploraApi.Transaction = await bitcoinApi.$getRawTransaction(req.params.txId, true);
+      res.setHeader('content-type', 'text/plain');
+      res.send(transaction.hex);
+    } catch (e) {
+      let statusCode = 500;
+      if (e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
+        statusCode = 404;
+      }
+      res.status(statusCode).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  /**
+   * Takes the PSBT as text/plain body, parses it, and adds the full
+   * parent transaction to each input that doesn't already have it.
+   * This is used for BTCPayServer / Trezor users which need access to
+   * the full parent transaction even with segwit inputs.
+   * It will respond with a text/plain PSBT in the same format (hex|base64).
+   */
+  private async postPsbtCompletion(req: Request, res: Response): Promise<void> {
+    res.setHeader('content-type', 'text/plain');
+    const notFoundError = `Couldn't get transaction hex for parent of input`;
+    try {
+      let psbt: bitcoinjs.Psbt;
+      let format: 'hex' | 'base64';
+      let isModified = false;
+      try {
+        psbt = bitcoinjs.Psbt.fromBase64(req.body);
+        format = 'base64';
+      } catch (e1) {
+        try {
+          psbt = bitcoinjs.Psbt.fromHex(req.body);
+          format = 'hex';
+        } catch (e2) {
+          throw new Error(`Unable to parse PSBT`);
+        }
+      }
+      for (const [index, input] of psbt.data.inputs.entries()) {
+        if (!input.nonWitnessUtxo) {
+          // Buffer.from ensures it won't be modified in place by reverse()
+          const txid = Buffer.from(psbt.txInputs[index].hash)
+            .reverse()
+            .toString('hex');
+
+          let transactionHex: string;
+          // If missing transaction, return 404 status error
+          try {
+            transactionHex = await bitcoinApi.$getTransactionHex(txid);
+            if (!transactionHex) {
+              throw new Error('');
+            }
+          } catch (err) {
+            throw new Error(`${notFoundError} #${index} @ ${txid}`);
+          }
+
+          psbt.updateInput(index, {
+            nonWitnessUtxo: Buffer.from(transactionHex, 'hex'),
+          });
+          if (!isModified) {
+            isModified = true;
+          }
+        }
+      }
+      if (isModified) {
+        res.send(format === 'hex' ? psbt.toHex() : psbt.toBase64());
+      } else {
+        // Not modified
+        // 422 Unprocessable Entity
+        // https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/422
+        res.status(422).send(`Psbt had no missing nonWitnessUtxos.`);
+      }
+    } catch (e: any) {
+      if (e instanceof Error && new RegExp(notFoundError).test(e.message)) {
+        res.status(404).send(e.message);
+      } else {
+        res.status(500).send(e instanceof Error ? e.message : e);
+      }
+    }
+  }
+
+  private async getTransactionStatus(req: Request, res: Response) {
+    try {
+      const transaction = await transactionUtils.$getTransactionExtended(req.params.txId, true);
+      res.json(transaction.status);
+    } catch (e) {
+      let statusCode = 500;
+      if (e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
+        statusCode = 404;
+      }
+      res.status(statusCode).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getStrippedBlockTransactions(req: Request, res: Response) {
+    try {
+      const transactions = await blocks.$getStrippedBlockTransactions(req.params.hash);
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
+      res.json(transactions);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlock(req: Request, res: Response) {
+    try {
+      const block = await blocks.$getBlock(req.params.hash);
+
+      const blockAge = new Date().getTime() / 1000 - block.timestamp;
+      const day = 24 * 3600;
+      let cacheDuration;
+      if (blockAge > 365 * day) {
+        cacheDuration = 30 * day;
+      } else if (blockAge > 30 * day) {
+        cacheDuration = 10 * day;
+      } else {
+        cacheDuration = 600
+      }
+
+      res.setHeader('Expires', new Date(Date.now() + 1000 * cacheDuration).toUTCString());
+      res.json(block);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlockHeader(req: Request, res: Response) {
+    try {
+      const blockHeader = await bitcoinApi.$getBlockHeader(req.params.hash);
+      res.setHeader('content-type', 'text/plain');
+      res.send(blockHeader);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlockAuditSummary(req: Request, res: Response) {
+    try {
+      const transactions = await blocks.$getBlockAuditSummary(req.params.hash);
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
+      res.json(transactions);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlocks(req: Request, res: Response) {
+    try {
+      if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) { // Bitcoin
+        const height = req.params.height === undefined ? undefined : parseInt(req.params.height, 10);
+        res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+        res.json(await blocks.$getBlocks(height, 15));
+      } else { // Liquid, Bisq
+        return await this.getLegacyBlocks(req, res);
+      }
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getLegacyBlocks(req: Request, res: Response) {
+    try {
+      const returnBlocks: IEsploraApi.Block[] = [];
+      const fromHeight = parseInt(req.params.height, 10) || blocks.getCurrentBlockHeight();
+
+      // Check if block height exist in local cache to skip the hash lookup
+      const blockByHeight = blocks.getBlocks().find((b) => b.height === fromHeight);
+      let startFromHash: string | null = null;
+      if (blockByHeight) {
+        startFromHash = blockByHeight.id;
+      } else {
+        startFromHash = await bitcoinApi.$getBlockHash(fromHeight);
+      }
+
+      let nextHash = startFromHash;
+      for (let i = 0; i < 10 && nextHash; i++) {
+        const localBlock = blocks.getBlocks().find((b) => b.id === nextHash);
+        if (localBlock) {
+          returnBlocks.push(localBlock);
+          nextHash = localBlock.previousblockhash;
+        } else {
+          const block = await bitcoinApi.$getBlock(nextHash);
+          returnBlocks.push(block);
+          nextHash = block.previousblockhash;
+        }
+      }
+
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(returnBlocks);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+  
+  private async getBlockTransactions(req: Request, res: Response) {
+    try {
+      loadingIndicators.setProgress('blocktxs-' + req.params.hash, 0);
+
+      const txIds = await bitcoinApi.$getTxIdsForBlock(req.params.hash);
+      const transactions: TransactionExtended[] = [];
+      const startingIndex = Math.max(0, parseInt(req.params.index || '0', 10));
+
+      const endIndex = Math.min(startingIndex + 10, txIds.length);
+      for (let i = startingIndex; i < endIndex; i++) {
+        try {
+          const transaction = await transactionUtils.$getTransactionExtended(txIds[i], true, true);
+          transactions.push(transaction);
+          loadingIndicators.setProgress('blocktxs-' + req.params.hash, (i - startingIndex + 1) / (endIndex - startingIndex) * 100);
+        } catch (e) {
+          logger.debug('getBlockTransactions error: ' + (e instanceof Error ? e.message : e));
+        }
+      }
+      res.json(transactions);
+    } catch (e) {
+      loadingIndicators.setProgress('blocktxs-' + req.params.hash, 100);
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlockHeight(req: Request, res: Response) {
+    try {
+      const blockHash = await bitcoinApi.$getBlockHash(parseInt(req.params.height, 10));
+      res.send(blockHash);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getAddress(req: Request, res: Response) {
+    if (config.MEMPOOL.BACKEND === 'none') {
+      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
+      return;
+    }
+
+    try {
+      const addressData = await bitcoinApi.$getAddress(req.params.address);
+      res.json(addressData);
+    } catch (e) {
+      if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
+        return res.status(413).send(e instanceof Error ? e.message : e);
+      }
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getAddressTransactions(req: Request, res: Response) {
+    if (config.MEMPOOL.BACKEND === 'none') {
+      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
+      return;
+    }
+
+    try {
+      const transactions = await bitcoinApi.$getAddressTransactions(req.params.address, req.params.txId);
+      res.json(transactions);
+    } catch (e) {
+      if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
+        return res.status(413).send(e instanceof Error ? e.message : e);
+      }
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getAdressTxChain(req: Request, res: Response) {
+    res.status(501).send('Not implemented');
+  }
+
+  private async getAddressPrefix(req: Request, res: Response) {
+    try {
+      const blockHash = await bitcoinApi.$getAddressPrefix(req.params.prefix);
+      res.send(blockHash);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getRecentMempoolTransactions(req: Request, res: Response) {
+    const latestTransactions = Object.entries(mempool.getMempool())
+      .sort((a, b) => (b[1].firstSeen || 0) - (a[1].firstSeen || 0))
+      .slice(0, 10).map((tx) => Common.stripTransaction(tx[1]));
+
+    res.json(latestTransactions);
+  }
+
+  private async getMempool(req: Request, res: Response) {
+    const info = mempool.getMempoolInfo();
+    res.json({
+      count: info.size,
+      vsize: info.bytes,
+      total_fee: info.total_fee * 1e8,
+      fee_histogram: []
+    });
+  }
+
+  private async getMempoolTxIds(req: Request, res: Response) {
+    try {
+      const rawMempool = await bitcoinApi.$getRawMempool();
+      res.send(rawMempool);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlockTipHeight(req: Request, res: Response) {
+    try {
+      const result = await bitcoinApi.$getBlockHeightTip();
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getBlockTipHash(req: Request, res: Response) {
+    try {
+      const result = await bitcoinApi.$getBlockHashTip();
+      res.setHeader('content-type', 'text/plain');
+      res.send(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getRawBlock(req: Request, res: Response) {
+    try {
+      const result = await bitcoinApi.$getRawBlock(req.params.hash);
+      res.setHeader('content-type', 'application/octet-stream');
+      res.send(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getTxIdsForBlock(req: Request, res: Response) {
+    try {
+      const result = await bitcoinApi.$getTxIdsForBlock(req.params.hash);
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async validateAddress(req: Request, res: Response) {
+    try {
+      const result = await bitcoinClient.validateAddress(req.params.address);
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getTransactionOutspends(req: Request, res: Response) {
+    try {
+      const result = await bitcoinApi.$getOutspends(req.params.txId);
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private getDifficultyChange(req: Request, res: Response) {
+    try {
+      const da = difficultyAdjustment.getDifficultyAdjustment();
+      if (da) {
+        res.json(da);
+      } else {
+        res.status(503).send(`Service Temporarily Unavailable`);
+      }
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $postTransaction(req: Request, res: Response) {
+    res.setHeader('content-type', 'text/plain');
+    try {
+      let rawTx;
+      if (typeof req.body === 'object') {
+        rawTx = Object.keys(req.body)[0];
+      } else {
+        rawTx = req.body;
+      }
+      const txIdResult = await bitcoinApi.$sendRawTransaction(rawTx);
+      res.send(txIdResult);
+    } catch (e: any) {
+      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
+        : (e.message || 'Error'));
+    }
+  }
+
+  private async $postTransactionForm(req: Request, res: Response) {
+    res.setHeader('content-type', 'text/plain');
+    const matches = /tx=([a-z0-9]+)/.exec(req.body);
+    let txHex = '';
+    if (matches && matches[1]) {
+      txHex = matches[1];
+    }
+    try {
+      const txIdResult = await bitcoinClient.sendRawTransaction(txHex);
+      res.send(txIdResult);
+    } catch (e: any) {
+      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
+        : (e.message || 'Error'));
+    }
+  }
+
+}
+
+export default new BitcoinRoutes();

backend/src/api/bitcoin/electrum-api.ts

@@ -1,12 +1,11 @@
 import config from '../../config';
+import Client from '@mempool/electrum-client';
 import { AbstractBitcoinApi } from './bitcoin-api-abstract-factory';
 import { IEsploraApi } from './esplora-api.interface';
 import { IElectrumApi } from './electrum-api.interface';
 import BitcoinApi from './bitcoin-api';
 import logger from '../../logger';
-import * as ElectrumClient from '@mempool/electrum-client';
-import * as sha256 from 'crypto-js/sha256';
-import * as hexEnc from 'crypto-js/enc-hex';
+import crypto from "crypto-js";
 import loadingIndicators from '../loading-indicators';
 import memoryCache from '../memory-cache';
 
@@ -26,7 +25,7 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
       onLog: (str) => { logger.debug(str); },
     };
 
-    this.electrumClient = new ElectrumClient(
+    this.electrumClient = new Client(
       config.ELECTRUM.PORT,
       config.ELECTRUM.HOST,
       config.ELECTRUM.TLS_ENABLED ? 'tls' : 'tcp',
@@ -35,7 +34,7 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
     );
 
     this.electrumClient.initElectrum(electrumConfig, electrumPersistencePolicy)
-      .then(() => {})
+      .then(() => { })
       .catch((err) => {
         logger.err(`Error connecting to Electrum Server at ${config.ELECTRUM.HOST}:${config.ELECTRUM.PORT}`);
       });
@@ -95,7 +94,7 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
   async $getAddressTransactions(address: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]> {
     const addressInfo = await this.bitcoindClient.validateAddress(address);
     if (!addressInfo || !addressInfo.isvalid) {
-     return [];
+      return [];
     }
 
     try {
@@ -144,8 +143,8 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
   }
 
   private encodeScriptHash(scriptPubKey: string): string {
-    const addrScripthash = hexEnc.stringify(sha256(hexEnc.parse(scriptPubKey)));
-    return addrScripthash.match(/.{2}/g).reverse().join('');
+    const addrScripthash = crypto.enc.Hex.stringify(crypto.SHA256(crypto.enc.Hex.parse(scriptPubKey)));
+    return addrScripthash!.match(/.{2}/g)!.reverse().join('');
   }
 
 }

backend/src/api/bitcoin/esplora-api.interface.ts

@@ -25,14 +25,16 @@ export namespace IEsploraApi {
     is_coinbase: boolean;
     scriptsig: string;
     scriptsig_asm: string;
-    inner_redeemscript_asm?: string;
-    inner_witnessscript_asm?: string;
+    inner_redeemscript_asm: string;
+    inner_witnessscript_asm: string;
     sequence: any;
-    witness?: string[];
+    witness: string[];
     prevout: Vout | null;
     // Elements
     is_pegin?: boolean;
     issuance?: Issuance;
+    // Custom
+    lazy?: boolean;
   }
 
   interface Issuance {
@@ -113,9 +115,9 @@ export namespace IEsploraApi {
 
   export interface Outspend {
     spent: boolean;
-    txid: string;
-    vin: number;
-    status: Status;
+    txid?: string;
+    vin?: number;
+    status?: Status;
   }
 
   export interface Asset {

backend/src/api/bitcoin/esplora-api.ts

@@ -20,11 +20,21 @@ class ElectrsApi implements AbstractBitcoinApi {
       .then((response) => response.data);
   }
 
+  $getTransactionHex(txId: string): Promise<string> {
+    return axios.get<string>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/hex', this.axiosConfig)
+      .then((response) => response.data);
+  }
+
   $getBlockHeightTip(): Promise<number> {
     return axios.get<number>(config.ESPLORA.REST_API_URL + '/blocks/tip/height', this.axiosConfig)
       .then((response) => response.data);
   }
 
+  $getBlockHashTip(): Promise<string> {
+    return axios.get<string>(config.ESPLORA.REST_API_URL + '/blocks/tip/hash', this.axiosConfig)
+      .then((response) => response.data);
+  }
+
   $getTxIdsForBlock(hash: string): Promise<string[]> {
     return axios.get<string[]>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/txids', this.axiosConfig)
       .then((response) => response.data);
@@ -45,6 +55,11 @@ class ElectrsApi implements AbstractBitcoinApi {
       .then((response) => response.data);
   }
 
+  $getRawBlock(hash: string): Promise<Buffer> {
+    return axios.get<string>(config.ESPLORA.REST_API_URL + '/block/' + hash + "/raw", { ...this.axiosConfig, responseType: 'arraybuffer' })
+      .then((response) => { return Buffer.from(response.data); });
+  }
+
   $getAddress(address: string): Promise<IEsploraApi.Address> {
     throw new Error('Method getAddress not implemented.');
   }
@@ -60,6 +75,25 @@ class ElectrsApi implements AbstractBitcoinApi {
   $sendRawTransaction(rawTransaction: string): Promise<string> {
     throw new Error('Method not implemented.');
   }
+
+  $getOutspend(txId: string, vout: number): Promise<IEsploraApi.Outspend> {
+    return axios.get<IEsploraApi.Outspend>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/outspend/' + vout, this.axiosConfig)
+      .then((response) => response.data);
+  }
+
+  $getOutspends(txId: string): Promise<IEsploraApi.Outspend[]> {
+    return axios.get<IEsploraApi.Outspend[]>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/outspends', this.axiosConfig)
+      .then((response) => response.data);
+  }
+
+  async $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]> {
+    const outspends: IEsploraApi.Outspend[][] = [];
+    for (const tx of txId) {
+      const outspend = await this.$getOutspends(tx);
+      outspends.push(outspend);
+    }
+    return outspends;
+  }
 }
 
 export default ElectrsApi;

backend/src/api/blocks.ts

@@ -2,19 +2,42 @@ import config from '../config';
 import bitcoinApi from './bitcoin/bitcoin-api-factory';
 import logger from '../logger';
 import memPool from './mempool';
-import { BlockExtended, TransactionExtended } from '../mempool.interfaces';
+import { BlockExtended, BlockSummary, PoolTag, TransactionExtended, TransactionStripped, TransactionMinerInfo } from '../mempool.interfaces';
 import { Common } from './common';
 import diskCache from './disk-cache';
 import transactionUtils from './transaction-utils';
 import bitcoinClient from './bitcoin/bitcoin-client';
+import { IBitcoinApi } from './bitcoin/bitcoin-api.interface';
+import { IEsploraApi } from './bitcoin/esplora-api.interface';
+import poolsRepository from '../repositories/PoolsRepository';
+import blocksRepository from '../repositories/BlocksRepository';
+import loadingIndicators from './loading-indicators';
+import BitcoinApi from './bitcoin/bitcoin-api';
+import { prepareBlock } from '../utils/blocks-utils';
+import BlocksRepository from '../repositories/BlocksRepository';
+import HashratesRepository from '../repositories/HashratesRepository';
+import indexer from '../indexer';
+import fiatConversion from './fiat-conversion';
+import poolsParser from './pools-parser';
+import BlocksSummariesRepository from '../repositories/BlocksSummariesRepository';
+import BlocksAuditsRepository from '../repositories/BlocksAuditsRepository';
+import cpfpRepository from '../repositories/CpfpRepository';
+import transactionRepository from '../repositories/TransactionRepository';
+import mining from './mining/mining';
+import DifficultyAdjustmentsRepository from '../repositories/DifficultyAdjustmentsRepository';
+import PricesRepository from '../repositories/PricesRepository';
+import priceUpdater from '../tasks/price-updater';
+import { Block } from 'bitcoinjs-lib';
 
 class Blocks {
   private blocks: BlockExtended[] = [];
+  private blockSummaries: BlockSummary[] = [];
   private currentBlockHeight = 0;
   private currentDifficulty = 0;
   private lastDifficultyAdjustmentTime = 0;
   private previousDifficultyRetarget = 0;
   private newBlockCallbacks: ((block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) => void)[] = [];
+  private newAsyncBlockCallbacks: ((block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) => Promise<void>)[] = [];
 
   constructor() { }
 
@@ -26,15 +49,412 @@ class Blocks {
     this.blocks = blocks;
   }
 
+  public getBlockSummaries(): BlockSummary[] {
+    return this.blockSummaries;
+  }
+
+  public setBlockSummaries(blockSummaries: BlockSummary[]) {
+    this.blockSummaries = blockSummaries;
+  }
+
   public setNewBlockCallback(fn: (block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) => void) {
     this.newBlockCallbacks.push(fn);
   }
 
+  public setNewAsyncBlockCallback(fn: (block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) => Promise<void>) {
+    this.newAsyncBlockCallbacks.push(fn);
+  }
+
+  /**
+   * Return the list of transaction for a block
+   * @param blockHash
+   * @param blockHeight
+   * @param onlyCoinbase - Set to true if you only need the coinbase transaction
+   * @returns Promise<TransactionExtended[]>
+   */
+  private async $getTransactionsExtended(
+    blockHash: string,
+    blockHeight: number,
+    onlyCoinbase: boolean,
+    quiet: boolean = false,
+  ): Promise<TransactionExtended[]> {
+    const transactions: TransactionExtended[] = [];
+    const txIds: string[] = await bitcoinApi.$getTxIdsForBlock(blockHash);
+
+    const mempool = memPool.getMempool();
+    let transactionsFound = 0;
+    let transactionsFetched = 0;
+
+    for (let i = 0; i < txIds.length; i++) {
+      if (mempool[txIds[i]]) {
+        // We update blocks before the mempool (index.ts), therefore we can
+        // optimize here by directly fetching txs in the "outdated" mempool
+        transactions.push(mempool[txIds[i]]);
+        transactionsFound++;
+      } else if (config.MEMPOOL.BACKEND === 'esplora' || !memPool.hasPriority() || i === 0) {
+        // Otherwise we fetch the tx data through backend services (esplora, electrum, core rpc...)
+        if (!quiet && (i % (Math.round((txIds.length) / 10)) === 0 || i + 1 === txIds.length)) { // Avoid log spam
+          logger.debug(`Indexing tx ${i + 1} of ${txIds.length} in block #${blockHeight}`);
+        }
+        try {
+          const tx = await transactionUtils.$getTransactionExtended(txIds[i]);
+          transactions.push(tx);
+          transactionsFetched++;
+        } catch (e) {
+          if (i === 0) {
+            const msg = `Cannot fetch coinbase tx ${txIds[i]}. Reason: ` + (e instanceof Error ? e.message : e); 
+            logger.err(msg);
+            throw new Error(msg);
+          } else {
+            logger.err(`Cannot fetch tx ${txIds[i]}. Reason: ` + (e instanceof Error ? e.message : e));
+          }
+        }
+      }
+
+      if (onlyCoinbase === true) {
+        break; // Fetch the first transaction and exit
+      }
+    }
+
+    transactions.forEach((tx) => {
+      if (!tx.cpfpChecked) {
+        Common.setRelativesAndGetCpfpInfo(tx, mempool); // Child Pay For Parent
+      }
+    });
+
+    if (!quiet) {
+      logger.debug(`${transactionsFound} of ${txIds.length} found in mempool. ${transactionsFetched} fetched through backend service.`);
+    }
+
+    return transactions;
+  }
+
+  /**
+   * Return a block summary (list of stripped transactions)
+   * @param block
+   * @returns BlockSummary
+   */
+  private summarizeBlock(block: IBitcoinApi.VerboseBlock): BlockSummary {
+    const stripped = block.tx.map((tx) => {
+      return {
+        txid: tx.txid,
+        vsize: tx.weight / 4,
+        fee: tx.fee ? Math.round(tx.fee * 100000000) : 0,
+        value: Math.round(tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0) * 100000000)
+      };
+    });
+
+    return {
+      id: block.hash,
+      transactions: stripped
+    };
+  }
+
+  /**
+   * Return a block with additional data (reward, coinbase, fees...)
+   * @param block
+   * @param transactions
+   * @returns BlockExtended
+   */
+  private async $getBlockExtended(block: IEsploraApi.Block, transactions: TransactionExtended[]): Promise<BlockExtended> {
+    const blockExtended: BlockExtended = Object.assign({ extras: {} }, block);
+    blockExtended.extras.reward = transactions[0].vout.reduce((acc, curr) => acc + curr.value, 0);
+    blockExtended.extras.coinbaseTx = transactionUtils.stripCoinbaseTransaction(transactions[0]);
+    blockExtended.extras.coinbaseRaw = blockExtended.extras.coinbaseTx.vin[0].scriptsig;
+    blockExtended.extras.usd = fiatConversion.getConversionRates().USD;
+
+    if (block.height === 0) {
+      blockExtended.extras.medianFee = 0; // 50th percentiles
+      blockExtended.extras.feeRange = [0, 0, 0, 0, 0, 0, 0];
+      blockExtended.extras.totalFees = 0;
+      blockExtended.extras.avgFee = 0;
+      blockExtended.extras.avgFeeRate = 0;
+    } else {
+      const stats = await bitcoinClient.getBlockStats(block.id, [
+        'feerate_percentiles', 'minfeerate', 'maxfeerate', 'totalfee', 'avgfee', 'avgfeerate'
+      ]);
+      blockExtended.extras.medianFee = stats.feerate_percentiles[2]; // 50th percentiles
+      blockExtended.extras.feeRange = [stats.minfeerate, stats.feerate_percentiles, stats.maxfeerate].flat();
+      blockExtended.extras.totalFees = stats.totalfee;
+      blockExtended.extras.avgFee = stats.avgfee;
+      blockExtended.extras.avgFeeRate = stats.avgfeerate;
+    }
+
+    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
+      let pool: PoolTag;
+      if (blockExtended.extras?.coinbaseTx !== undefined) {
+        pool = await this.$findBlockMiner(blockExtended.extras?.coinbaseTx);
+      } else {
+        if (config.DATABASE.ENABLED === true) {
+          pool = await poolsRepository.$getUnknownPool();
+        } else {
+          pool = poolsParser.unknownPool;
+        }
+      }
+
+      if (!pool) { // We should never have this situation in practise
+        logger.warn(`Cannot assign pool to block ${blockExtended.height} and 'unknown' pool does not exist. ` +
+          `Check your "pools" table entries`);
+      } else {
+        blockExtended.extras.pool = {
+          id: pool.id,
+          name: pool.name,
+          slug: pool.slug,
+        };
+      }
+
+      const auditScore = await BlocksAuditsRepository.$getBlockAuditScore(block.id);
+      if (auditScore != null) {
+        blockExtended.extras.matchRate = auditScore.matchRate;
+      }
+    }
+
+    return blockExtended;
+  }
+
+  /**
+   * Try to find which miner found the block
+   * @param txMinerInfo
+   * @returns
+   */
+  private async $findBlockMiner(txMinerInfo: TransactionMinerInfo | undefined): Promise<PoolTag> {
+    if (txMinerInfo === undefined || txMinerInfo.vout.length < 1) {
+      if (config.DATABASE.ENABLED === true) {
+        return await poolsRepository.$getUnknownPool();
+      } else {
+        return poolsParser.unknownPool;
+      }
+    }
+
+    const asciiScriptSig = transactionUtils.hex2ascii(txMinerInfo.vin[0].scriptsig);
+    const address = txMinerInfo.vout[0].scriptpubkey_address;
+
+    let pools: PoolTag[] = [];
+    if (config.DATABASE.ENABLED === true) {
+      pools = await poolsRepository.$getPools();
+    } else {
+      pools = poolsParser.miningPools;
+    }
+    for (let i = 0; i < pools.length; ++i) {
+      if (address !== undefined) {
+        const addresses: string[] = JSON.parse(pools[i].addresses);
+        if (addresses.indexOf(address) !== -1) {
+          return pools[i];
+        }
+      }
+
+      const regexes: string[] = JSON.parse(pools[i].regexes);
+      for (let y = 0; y < regexes.length; ++y) {
+        const regex = new RegExp(regexes[y], 'i');
+        const match = asciiScriptSig.match(regex);
+        if (match !== null) {
+          return pools[i];
+        }
+      }
+    }
+
+    if (config.DATABASE.ENABLED === true) {
+      return await poolsRepository.$getUnknownPool();
+    } else {
+      return poolsParser.unknownPool;
+    }
+  }
+
+  /**
+   * [INDEXING] Index all blocks summaries for the block txs visualization
+   */
+  public async $generateBlocksSummariesDatabase(): Promise<void> {
+    if (Common.blocksSummariesIndexingEnabled() === false) {
+      return;
+    }
+
+    try {
+      // Get all indexed block hash
+      const indexedBlocks = await blocksRepository.$getIndexedBlocks();
+      const indexedBlockSummariesHashesArray = await BlocksSummariesRepository.$getIndexedSummariesId();
+
+      const indexedBlockSummariesHashes = {}; // Use a map for faster seek during the indexing loop
+      for (const hash of indexedBlockSummariesHashesArray) {
+        indexedBlockSummariesHashes[hash] = true;
+      }
+
+      // Logging
+      let newlyIndexed = 0;
+      let totalIndexed = indexedBlockSummariesHashesArray.length;
+      let indexedThisRun = 0;
+      let timer = new Date().getTime() / 1000;
+      const startedAt = new Date().getTime() / 1000;
+
+      for (const block of indexedBlocks) {
+        if (indexedBlockSummariesHashes[block.hash] === true) {
+          continue;
+        }
+
+        // Logging
+        const elapsedSeconds = Math.max(1, Math.round((new Date().getTime() / 1000) - timer));
+        if (elapsedSeconds > 5) {
+          const runningFor = Math.max(1, Math.round((new Date().getTime() / 1000) - startedAt));
+          const blockPerSeconds = Math.max(1, indexedThisRun / elapsedSeconds);
+          const progress = Math.round(totalIndexed / indexedBlocks.length * 10000) / 100;
+          logger.debug(`Indexing block summary for #${block.height} | ~${blockPerSeconds.toFixed(2)} blocks/sec | total: ${totalIndexed}/${indexedBlocks.length} (${progress}%) | elapsed: ${runningFor} seconds`);
+          timer = new Date().getTime() / 1000;
+          indexedThisRun = 0;
+        }
+
+        await this.$getStrippedBlockTransactions(block.hash, true, true); // This will index the block summary
+
+        // Logging
+        indexedThisRun++;
+        totalIndexed++;
+        newlyIndexed++;
+      }
+      if (newlyIndexed > 0) {
+        logger.notice(`Blocks summaries indexing completed: indexed ${newlyIndexed} blocks`);
+      } else {
+        logger.debug(`Blocks summaries indexing completed: indexed ${newlyIndexed} blocks`);
+      }
+    } catch (e) {
+      logger.err(`Blocks summaries indexing failed. Trying again in 10 seconds. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
+  /**
+   * [INDEXING] Index transaction CPFP data for all blocks
+   */
+   public async $generateCPFPDatabase(): Promise<void> {
+    if (Common.cpfpIndexingEnabled() === false) {
+      return;
+    }
+
+    try {
+      // Get all indexed block hash
+      const unindexedBlocks = await blocksRepository.$getCPFPUnindexedBlocks();
+
+      if (!unindexedBlocks?.length) {
+        return;
+      }
+
+      // Logging
+      let count = 0;
+      let countThisRun = 0;
+      let timer = new Date().getTime() / 1000;
+      const startedAt = new Date().getTime() / 1000;
+
+      for (const block of unindexedBlocks) {
+        // Logging
+        const elapsedSeconds = Math.max(1, new Date().getTime() / 1000 - timer);
+        if (elapsedSeconds > 5) {
+          const runningFor = Math.max(1, Math.round((new Date().getTime() / 1000) - startedAt));
+          const blockPerSeconds = Math.max(1, countThisRun / elapsedSeconds);
+          const progress = Math.round(count / unindexedBlocks.length * 10000) / 100;
+          logger.debug(`Indexing cpfp clusters for #${block.height} | ~${blockPerSeconds.toFixed(2)} blocks/sec | total: ${count}/${unindexedBlocks.length} (${progress}%) | elapsed: ${runningFor} seconds`);
+          timer = new Date().getTime() / 1000;
+          countThisRun = 0;
+        }
+
+        await this.$indexCPFP(block.hash, block.height); // Calculate and save CPFP data for transactions in this block
+
+        // Logging
+        count++;
+        countThisRun++;
+      }
+      if (count > 0) {
+        logger.notice(`CPFP indexing completed: indexed ${count} blocks`);
+      } else {
+        logger.debug(`CPFP indexing completed: indexed ${count} blocks`);
+      }
+    } catch (e) {
+      logger.err(`CPFP indexing failed. Trying again in 10 seconds. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
+  /**
+   * [INDEXING] Index all blocks metadata for the mining dashboard
+   */
+  public async $generateBlockDatabase(): Promise<boolean> {
+    try {
+      const blockchainInfo = await bitcoinClient.getBlockchainInfo();
+      let currentBlockHeight = blockchainInfo.blocks;
+
+      let indexingBlockAmount = Math.min(config.MEMPOOL.INDEXING_BLOCKS_AMOUNT, blockchainInfo.blocks);
+      if (indexingBlockAmount <= -1) {
+        indexingBlockAmount = currentBlockHeight + 1;
+      }
+
+      const lastBlockToIndex = Math.max(0, currentBlockHeight - indexingBlockAmount + 1);
+
+      logger.debug(`Indexing blocks from #${currentBlockHeight} to #${lastBlockToIndex}`);
+      loadingIndicators.setProgress('block-indexing', 0);
+
+      const chunkSize = 10000;
+      let totalIndexed = await blocksRepository.$blockCountBetweenHeight(currentBlockHeight, lastBlockToIndex);
+      let indexedThisRun = 0;
+      let newlyIndexed = 0;
+      const startedAt = new Date().getTime() / 1000;
+      let timer = new Date().getTime() / 1000;
+
+      while (currentBlockHeight >= lastBlockToIndex) {
+        const endBlock = Math.max(0, lastBlockToIndex, currentBlockHeight - chunkSize + 1);
+
+        const missingBlockHeights: number[] = await blocksRepository.$getMissingBlocksBetweenHeights(
+          currentBlockHeight, endBlock);
+        if (missingBlockHeights.length <= 0) {
+          currentBlockHeight -= chunkSize;
+          continue;
+        }
+
+        logger.info(`Indexing ${missingBlockHeights.length} blocks from #${currentBlockHeight} to #${endBlock}`);
+
+        for (const blockHeight of missingBlockHeights) {
+          if (blockHeight < lastBlockToIndex) {
+            break;
+          }
+          ++indexedThisRun;
+          ++totalIndexed;
+          const elapsedSeconds = Math.max(1, new Date().getTime() / 1000 - timer);
+          if (elapsedSeconds > 5 || blockHeight === lastBlockToIndex) {
+            const runningFor = Math.max(1, Math.round((new Date().getTime() / 1000) - startedAt));
+            const blockPerSeconds = Math.max(1, indexedThisRun / elapsedSeconds);
+            const progress = Math.round(totalIndexed / indexingBlockAmount * 10000) / 100;
+            logger.debug(`Indexing block #${blockHeight} | ~${blockPerSeconds.toFixed(2)} blocks/sec | total: ${totalIndexed}/${indexingBlockAmount} (${progress}%) | elapsed: ${runningFor} seconds`);
+            timer = new Date().getTime() / 1000;
+            indexedThisRun = 0;
+            loadingIndicators.setProgress('block-indexing', progress, false);
+          }
+          const blockHash = await bitcoinApi.$getBlockHash(blockHeight);
+          const block = BitcoinApi.convertBlock(await bitcoinClient.getBlock(blockHash));
+          const transactions = await this.$getTransactionsExtended(blockHash, block.height, true, true);
+          const blockExtended = await this.$getBlockExtended(block, transactions);
+
+          newlyIndexed++;
+          await blocksRepository.$saveBlockInDatabase(blockExtended);
+        }
+
+        currentBlockHeight -= chunkSize;
+      }
+      if (newlyIndexed > 0) {
+        logger.notice(`Block indexing completed: indexed ${newlyIndexed} blocks`);
+      } else {
+        logger.debug(`Block indexing completed: indexed ${newlyIndexed} blocks`);
+      }
+      loadingIndicators.setProgress('block-indexing', 100);
+    } catch (e) {
+      logger.err('Block indexing failed. Trying again in 10 seconds. Reason: ' + (e instanceof Error ? e.message : e));
+      loadingIndicators.setProgress('block-indexing', 100);
+      throw e;
+    }
+
+    return await BlocksRepository.$validateChain();
+  }
+
   public async $updateBlocks() {
+    let fastForwarded = false;
     const blockHeightTip = await bitcoinApi.$getBlockHeightTip();
 
     if (this.blocks.length === 0) {
-      this.currentBlockHeight = blockHeightTip - config.MEMPOOL.INITIAL_BLOCKS_AMOUNT;
+      this.currentBlockHeight = Math.max(blockHeightTip - config.MEMPOOL.INITIAL_BLOCKS_AMOUNT, -1);
     } else {
       this.currentBlockHeight = this.blocks[this.blocks.length - 1].height;
     }
@@ -42,6 +462,9 @@ class Blocks {
     if (blockHeightTip - this.currentBlockHeight > config.MEMPOOL.INITIAL_BLOCKS_AMOUNT * 2) {
       logger.info(`${blockHeightTip - this.currentBlockHeight} blocks since tip. Fast forwarding to the ${config.MEMPOOL.INITIAL_BLOCKS_AMOUNT} recent blocks`);
       this.currentBlockHeight = blockHeightTip - config.MEMPOOL.INITIAL_BLOCKS_AMOUNT;
+      fastForwarded = true;
+      logger.info(`Re-indexing skipped blocks and corresponding hashrates data`);
+      indexer.reindex(); // Make sure to index the skipped blocks #1619
     }
 
     if (!this.lastDifficultyAdjustmentTime) {
@@ -49,71 +472,97 @@ class Blocks {
       if (blockchainInfo.blocks === blockchainInfo.headers) {
         const heightDiff = blockHeightTip % 2016;
         const blockHash = await bitcoinApi.$getBlockHash(blockHeightTip - heightDiff);
-        const block = await bitcoinApi.$getBlock(blockHash);
+        const block = BitcoinApi.convertBlock(await bitcoinClient.getBlock(blockHash));
         this.lastDifficultyAdjustmentTime = block.timestamp;
         this.currentDifficulty = block.difficulty;
 
-        const previousPeriodBlockHash = await bitcoinApi.$getBlockHash(blockHeightTip - heightDiff - 2016);
-        const previousPeriodBlock = await bitcoinApi.$getBlock(previousPeriodBlockHash);
-        this.previousDifficultyRetarget = (block.difficulty - previousPeriodBlock.difficulty) / previousPeriodBlock.difficulty * 100;
-        logger.debug(`Initial difficulty adjustment data set.`);
+        if (blockHeightTip >= 2016) {
+          const previousPeriodBlockHash = await bitcoinApi.$getBlockHash(blockHeightTip - heightDiff - 2016);
+          const previousPeriodBlock = await bitcoinClient.getBlock(previousPeriodBlockHash)
+          this.previousDifficultyRetarget = (block.difficulty - previousPeriodBlock.difficulty) / previousPeriodBlock.difficulty * 100;
+          logger.debug(`Initial difficulty adjustment data set.`);
+        }
       } else {
         logger.debug(`Blockchain headers (${blockchainInfo.headers}) and blocks (${blockchainInfo.blocks}) not in sync. Waiting...`);
       }
     }
 
     while (this.currentBlockHeight < blockHeightTip) {
-      if (this.currentBlockHeight === 0) {
+      if (this.currentBlockHeight < blockHeightTip - config.MEMPOOL.INITIAL_BLOCKS_AMOUNT) {
         this.currentBlockHeight = blockHeightTip;
       } else {
         this.currentBlockHeight++;
         logger.debug(`New block found (#${this.currentBlockHeight})!`);
       }
 
-      const transactions: TransactionExtended[] = [];
-
       const blockHash = await bitcoinApi.$getBlockHash(this.currentBlockHeight);
-      const block = await bitcoinApi.$getBlock(blockHash);
+      const verboseBlock = await bitcoinClient.getBlock(blockHash, 2);
+      const block = BitcoinApi.convertBlock(verboseBlock);
       const txIds: string[] = await bitcoinApi.$getTxIdsForBlock(blockHash);
+      const transactions = await this.$getTransactionsExtended(blockHash, block.height, false);
+      const blockExtended: BlockExtended = await this.$getBlockExtended(block, transactions);
+      const blockSummary: BlockSummary = this.summarizeBlock(verboseBlock);
 
-      const mempool = memPool.getMempool();
-      let transactionsFound = 0;
+      // start async callbacks
+      const callbackPromises = this.newAsyncBlockCallbacks.map((cb) => cb(blockExtended, txIds, transactions));
 
-      for (let i = 0; i < txIds.length; i++) {
-        if (mempool[txIds[i]]) {
-          transactions.push(mempool[txIds[i]]);
-          transactionsFound++;
-        } else if (config.MEMPOOL.BACKEND === 'esplora' || memPool.isInSync() || i === 0) {
-          logger.debug(`Fetching block tx ${i} of ${txIds.length}`);
-          try {
-            const tx = await transactionUtils.$getTransactionExtended(txIds[i]);
-            transactions.push(tx);
-          } catch (e) {
-            logger.debug('Error fetching block tx: ' + (e instanceof Error ? e.message : e));
-            if (i === 0) {
-              throw new Error('Failed to fetch Coinbase transaction: ' + txIds[i]);
+      if (Common.indexingEnabled()) {
+        if (!fastForwarded) {
+          const lastBlock = await blocksRepository.$getBlockByHeight(blockExtended.height - 1);
+          if (lastBlock !== null && blockExtended.previousblockhash !== lastBlock['hash']) {
+            logger.warn(`Chain divergence detected at block ${lastBlock['height']}, re-indexing most recent data`);
+            // We assume there won't be a reorg with more than 10 block depth
+            await BlocksRepository.$deleteBlocksFrom(lastBlock['height'] - 10);
+            await HashratesRepository.$deleteLastEntries();
+            await BlocksSummariesRepository.$deleteBlocksFrom(lastBlock['height'] - 10);
+            await cpfpRepository.$deleteClustersFrom(lastBlock['height'] - 10);
+            for (let i = 10; i >= 0; --i) {
+              const newBlock = await this.$indexBlock(lastBlock['height'] - i);
+              await this.$getStrippedBlockTransactions(newBlock.id, true, true);
+              if (config.MEMPOOL.TRANSACTION_INDEXING) {
+                await this.$indexCPFP(newBlock.id, lastBlock['height'] - i);
+              }
             }
+            await mining.$indexDifficultyAdjustments();
+            await DifficultyAdjustmentsRepository.$deleteLastAdjustment();
+            logger.info(`Re-indexed 10 blocks and summaries. Also re-indexed the last difficulty adjustments. Will re-index latest hashrates in a few seconds.`);
+            indexer.reindex();
+          }
+          await blocksRepository.$saveBlockInDatabase(blockExtended);
+
+          const lastestPriceId = await PricesRepository.$getLatestPriceId();
+          if (priceUpdater.historyInserted === true && lastestPriceId !== null) {
+            await blocksRepository.$saveBlockPrices([{
+              height: blockExtended.height,
+              priceId: lastestPriceId,
+            }]);
+          } else {
+            logger.info(`Cannot save block price for ${blockExtended.height} because the price updater hasnt completed yet. Trying again in 10 seconds.`)
+            setTimeout(() => {
+              indexer.runSingleTask('blocksPrices');
+            }, 10000);
+          }
+
+          // Save blocks summary for visualization if it's enabled
+          if (Common.blocksSummariesIndexingEnabled() === true) {
+            await this.$getStrippedBlockTransactions(blockExtended.id, true);
+          }
+          if (config.MEMPOOL.TRANSACTION_INDEXING) {
+            this.$indexCPFP(blockExtended.id, this.currentBlockHeight);
           }
         }
       }
 
-      transactions.forEach((tx) => {
-        if (!tx.cpfpChecked) {
-          Common.setRelativesAndGetCpfpInfo(tx, mempool);
-        }
-      });
-
-      logger.debug(`${transactionsFound} of ${txIds.length} found in mempool. ${txIds.length - transactionsFound} not found.`);
-
-      const blockExtended: BlockExtended = Object.assign({}, block);
-      blockExtended.reward = transactions[0].vout.reduce((acc, curr) => acc + curr.value, 0);
-      blockExtended.coinbaseTx = transactionUtils.stripCoinbaseTransaction(transactions[0]);
-      transactions.shift();
-      transactions.sort((a, b) => b.effectiveFeePerVsize - a.effectiveFeePerVsize);
-      blockExtended.medianFee = transactions.length > 0 ? Common.median(transactions.map((tx) => tx.effectiveFeePerVsize)) : 0;
-      blockExtended.feeRange = transactions.length > 0 ? Common.getFeesInRange(transactions, 8) : [0, 0];
-
       if (block.height % 2016 === 0) {
+        if (Common.indexingEnabled()) {
+          await DifficultyAdjustmentsRepository.$saveAdjustments({
+            time: block.timestamp,
+            height: block.height,
+            difficulty: block.difficulty,
+            adjustment: Math.round((block.difficulty / this.currentDifficulty) * 1000000) / 1000000, // Remove float point noise
+          });
+        }
+
         this.previousDifficultyRetarget = (block.difficulty - this.currentDifficulty) / this.currentDifficulty * 100;
         this.lastDifficultyAdjustmentTime = block.timestamp;
         this.currentDifficulty = block.difficulty;
@@ -123,16 +572,162 @@ class Blocks {
       if (this.blocks.length > config.MEMPOOL.INITIAL_BLOCKS_AMOUNT * 4) {
         this.blocks = this.blocks.slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT * 4);
       }
+      this.blockSummaries.push(blockSummary);
+      if (this.blockSummaries.length > config.MEMPOOL.INITIAL_BLOCKS_AMOUNT * 4) {
+        this.blockSummaries = this.blockSummaries.slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT * 4);
+      }
 
       if (this.newBlockCallbacks.length) {
         this.newBlockCallbacks.forEach((cb) => cb(blockExtended, txIds, transactions));
       }
-      if (memPool.isInSync()) {
+      if (!memPool.hasPriority()) {
         diskCache.$saveCacheToDisk();
       }
+
+      // wait for pending async callbacks to finish
+      await Promise.all(callbackPromises);
     }
   }
 
+  /**
+   * Index a block if it's missing from the database. Returns the block after indexing
+   */
+  public async $indexBlock(height: number): Promise<BlockExtended> {
+    const dbBlock = await blocksRepository.$getBlockByHeight(height);
+    if (dbBlock != null) {
+      return prepareBlock(dbBlock);
+    }
+
+    const blockHash = await bitcoinApi.$getBlockHash(height);
+    const block = BitcoinApi.convertBlock(await bitcoinClient.getBlock(blockHash));
+    const transactions = await this.$getTransactionsExtended(blockHash, block.height, true);
+    const blockExtended = await this.$getBlockExtended(block, transactions);
+
+    await blocksRepository.$saveBlockInDatabase(blockExtended);
+
+    return prepareBlock(blockExtended);
+  }
+
+  /**
+   * Index a block by hash if it's missing from the database. Returns the block after indexing
+   */
+  public async $getBlock(hash: string): Promise<BlockExtended | IEsploraApi.Block> {
+    // Check the memory cache
+    const blockByHash = this.getBlocks().find((b) => b.id === hash);
+    if (blockByHash) {
+      return blockByHash;
+    }
+
+    // Block has already been indexed
+    if (Common.indexingEnabled()) {
+      const dbBlock = await blocksRepository.$getBlockByHash(hash);
+      if (dbBlock != null) {
+        return prepareBlock(dbBlock);
+      }
+    }
+
+    // Not Bitcoin network, return the block as it
+    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) === false) {
+      return await bitcoinApi.$getBlock(hash);
+    }
+
+    let block = await bitcoinClient.getBlock(hash);
+    block = prepareBlock(block);
+
+    // Bitcoin network, add our custom data on top
+    const transactions = await this.$getTransactionsExtended(hash, block.height, true);
+    const blockExtended = await this.$getBlockExtended(block, transactions);
+    if (Common.indexingEnabled()) {
+      delete(blockExtended['coinbaseTx']);
+      await blocksRepository.$saveBlockInDatabase(blockExtended);
+    }
+
+    return blockExtended;
+  }
+
+  public async $getStrippedBlockTransactions(hash: string, skipMemoryCache = false,
+    skipDBLookup = false): Promise<TransactionStripped[]>
+  {
+    if (skipMemoryCache === false) {
+      // Check the memory cache
+      const cachedSummary = this.getBlockSummaries().find((b) => b.id === hash);
+      if (cachedSummary?.transactions?.length) {
+        return cachedSummary.transactions;
+      }
+    }
+
+    // Check if it's indexed in db
+    if (skipDBLookup === false && Common.blocksSummariesIndexingEnabled() === true) {
+      const indexedSummary = await BlocksSummariesRepository.$getByBlockId(hash);
+      if (indexedSummary !== undefined && indexedSummary?.transactions?.length) {
+        return indexedSummary.transactions;
+      }
+    }
+
+    // Call Core RPC
+    const block = await bitcoinClient.getBlock(hash, 2);
+    const summary = this.summarizeBlock(block);
+
+    // Index the response if needed
+    if (Common.blocksSummariesIndexingEnabled() === true) {
+      await BlocksSummariesRepository.$saveSummary({height: block.height, mined: summary});
+    }
+
+    return summary.transactions;
+  }
+
+  public async $getBlocks(fromHeight?: number, limit: number = 15): Promise<BlockExtended[]> {
+    let currentHeight = fromHeight !== undefined ? fromHeight : await blocksRepository.$mostRecentBlockHeight();
+    const returnBlocks: BlockExtended[] = [];
+
+    if (currentHeight < 0) {
+      return returnBlocks;
+    }
+
+    // Check if block height exist in local cache to skip the hash lookup
+    const blockByHeight = this.getBlocks().find((b) => b.height === currentHeight);
+    let startFromHash: string | null = null;
+    if (blockByHeight) {
+      startFromHash = blockByHeight.id;
+    } else if (!Common.indexingEnabled()) {
+      startFromHash = await bitcoinApi.$getBlockHash(currentHeight);
+    }
+
+    let nextHash = startFromHash;
+    for (let i = 0; i < limit && currentHeight >= 0; i++) {
+      let block = this.getBlocks().find((b) => b.height === currentHeight);
+      if (block) {
+        returnBlocks.push(block);
+      } else if (Common.indexingEnabled()) {
+        block = await this.$indexBlock(currentHeight);
+        returnBlocks.push(block);
+      } else if (nextHash != null) {
+        block = prepareBlock(await bitcoinClient.getBlock(nextHash));
+        nextHash = block.previousblockhash;
+        returnBlocks.push(block);
+      }
+      currentHeight--;
+    }
+
+    return returnBlocks;
+  }
+
+  public async $getBlockAuditSummary(hash: string): Promise<any> {
+    let summary;
+    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
+      summary = await BlocksAuditsRepository.$getBlockAudit(hash);
+    }
+
+    // fallback to non-audited transaction summary
+    if (!summary?.transactions?.length) {
+      const strippedTransactions = await this.$getStrippedBlockTransactions(hash);
+      summary = {
+        transactions: strippedTransactions
+      };
+    }
+    return summary;
+  }
+
   public getLastDifficultyAdjustmentTime(): number {
     return this.lastDifficultyAdjustmentTime;
   }
@@ -144,6 +739,62 @@ class Blocks {
   public getCurrentBlockHeight(): number {
     return this.currentBlockHeight;
   }
+
+  public async $indexCPFP(hash: string, height: number): Promise<void> {
+    let transactions;
+    if (false/*Common.blocksSummariesIndexingEnabled()*/) {
+      transactions = await this.$getStrippedBlockTransactions(hash);
+      const rawBlock = await bitcoinApi.$getRawBlock(hash);
+      const block = Block.fromBuffer(rawBlock);
+      const txMap = {};
+      for (const tx of block.transactions || []) {
+        txMap[tx.getId()] = tx;
+      }
+      for (const tx of transactions) {
+        if (txMap[tx.txid]?.ins) {
+          tx.vin = txMap[tx.txid].ins.map(vin => {
+            return {
+              txid: vin.hash
+            };
+          });
+        }
+      }
+    } else {
+      const block = await bitcoinClient.getBlock(hash, 2);
+      transactions = block.tx.map(tx => {
+        tx.vsize = tx.weight / 4;
+        return tx;
+      });
+    }
+ 
+    let cluster: TransactionStripped[] = [];
+    let ancestors: { [txid: string]: boolean } = {};
+    for (let i = transactions.length - 1; i >= 0; i--) {
+      const tx = transactions[i];
+      if (!ancestors[tx.txid]) {
+        let totalFee = 0;
+        let totalVSize = 0;
+        cluster.forEach(tx => {
+          totalFee += tx?.fee || 0;
+          totalVSize += tx.vsize;
+        });
+        const effectiveFeePerVsize = (totalFee * 100_000_000) / totalVSize;
+        if (cluster.length > 1) {
+          await cpfpRepository.$saveCluster(height, cluster.map(tx => { return { txid: tx.txid, weight: tx.vsize * 4, fee: (tx.fee || 0) * 100_000_000 }; }), effectiveFeePerVsize);
+          for (const tx of cluster) {
+            await transactionRepository.$setCluster(tx.txid, cluster[0].txid);
+          }
+        }
+        cluster = [];
+        ancestors = {};
+      }
+      cluster.push(tx);
+      tx.vin.forEach(vin => {
+        ancestors[vin.txid] = true;
+      });
+    }
+    await blocksRepository.$setCPFPIndexed(hash);
+  }
 }
 
 export default new Blocks();

backend/src/api/common.ts

@@ -1,7 +1,16 @@
 import { CpfpInfo, TransactionExtended, TransactionStripped } from '../mempool.interfaces';
 import config from '../config';
+import { NodeSocket } from '../repositories/NodesSocketsRepository';
+import { isIP } from 'net';
 export class Common {
-  static nativeAssetId = '6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d';
+  static nativeAssetId = config.MEMPOOL.NETWORK === 'liquidtestnet' ?
+    '144c654344aa716d6f3abcc1ca90e5641e4e2a7f633bc09fe3baf64585819a49'
+  : '6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d';
+  static _isLiquid = config.MEMPOOL.NETWORK === 'liquid' || config.MEMPOOL.NETWORK === 'liquidtestnet';
+
+  static isLiquid(): boolean {
+    return this._isLiquid;
+  }
 
   static median(numbers: number[]) {
     let medianNr = 0;
@@ -70,7 +79,7 @@ export class Common {
     };
   }
 
-  static sleep(ms: number): Promise<void> {
+  static sleep$(ms: number): Promise<void> {
     return new Promise((resolve) => {
        setTimeout(() => {
          resolve();
@@ -107,7 +116,7 @@ export class Common {
       totalFees += tx.bestDescendant.fee;
     }
 
-    tx.effectiveFeePerVsize = Math.max(config.MEMPOOL.NETWORK === 'liquid' ? 0.1 : 1, totalFees / (totalWeight / 4));
+    tx.effectiveFeePerVsize = Math.max(0, totalFees / (totalWeight / 4));
     tx.cpfpChecked = true;
 
     return {
@@ -147,4 +156,154 @@ export class Common {
     });
     return parents;
   }
+
+  static getSqlInterval(interval: string | null): string | null {
+    switch (interval) {
+      case '24h': return '1 DAY';
+      case '3d': return '3 DAY';
+      case '1w': return '1 WEEK';
+      case '1m': return '1 MONTH';
+      case '3m': return '3 MONTH';
+      case '6m': return '6 MONTH';
+      case '1y': return '1 YEAR';
+      case '2y': return '2 YEAR';
+      case '3y': return '3 YEAR';
+      default: return null;
+    }
+  }
+
+  static indexingEnabled(): boolean {
+    return (
+      ['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) &&
+      config.DATABASE.ENABLED === true &&
+      config.MEMPOOL.INDEXING_BLOCKS_AMOUNT !== 0
+    );
+  }
+
+  static blocksSummariesIndexingEnabled(): boolean {
+    return (
+      Common.indexingEnabled() &&
+      config.MEMPOOL.BLOCKS_SUMMARIES_INDEXING === true
+    );
+  }
+
+  static cpfpIndexingEnabled(): boolean {
+    return (
+      Common.indexingEnabled() &&
+      config.MEMPOOL.TRANSACTION_INDEXING === true
+    );
+  }
+
+  static setDateMidnight(date: Date): void {
+    date.setUTCHours(0);
+    date.setUTCMinutes(0);
+    date.setUTCSeconds(0);
+    date.setUTCMilliseconds(0);
+  }
+
+  static channelShortIdToIntegerId(channelId: string): string {
+    if (channelId.indexOf('x') === -1) { // Already an integer id
+      return channelId;
+    }
+    if (channelId.indexOf('/') !== -1) { // Topology import
+      channelId = channelId.slice(0, -2);
+    }
+    const s = channelId.split('x').map(part => BigInt(part));
+    return ((s[0] << 40n) | (s[1] << 16n) | s[2]).toString();
+  }
+
+  /** Decodes a channel id returned by lnd as uint64 to a short channel id */
+  static channelIntegerIdToShortId(id: string): string {
+    if (id.indexOf('/') !== -1) {
+      id = id.slice(0, -2);
+    }
+    
+    if (id.indexOf('x') !== -1) { // Already a short id
+      return id;
+    }
+
+    const n = BigInt(id);
+    return [
+      n >> 40n, // nth block
+      (n >> 16n) & 0xffffffn, // nth tx of the block
+      n & 0xffffn // nth output of the tx
+    ].join('x');
+  }
+
+  static utcDateToMysql(date?: number): string {
+    const d = new Date((date || 0) * 1000);
+    return d.toISOString().split('T')[0] + ' ' + d.toTimeString().split(' ')[0];
+  }
+
+  static findSocketNetwork(addr: string): {network: string | null, url: string} {
+    let network: string | null = null;
+    let url = addr.split('://')[1];
+
+    if (!url) {
+      return {
+        network: null,
+        url: addr,
+      };
+    }
+
+    if (addr.indexOf('onion') !== -1) {
+      if (url.split('.')[0].length >= 56) {
+        network = 'torv3';
+      } else {
+        network = 'torv2';
+      }
+    } else if (addr.indexOf('i2p') !== -1) {
+      network = 'i2p';
+    } else if (addr.indexOf('ipv4') !== -1) {
+      const ipv = isIP(url.split(':')[0]);
+      if (ipv === 4) {
+        network = 'ipv4';
+      } else {
+        return {
+          network: null,
+          url: addr,
+        };
+      }
+    } else if (addr.indexOf('ipv6') !== -1) {
+      url = url.split('[')[1].split(']')[0];
+      const ipv = isIP(url);
+      if (ipv === 6) {
+        const parts = addr.split(':');
+        network = 'ipv6';
+        url = `[${url}]:${parts[parts.length - 1]}`;
+      } else {
+        return {
+          network: null,
+          url: addr,
+        };
+      }
+    } else {
+      return {
+        network: null,
+        url: addr,
+      };
+    }
+
+    return {
+      network: network,
+      url: url,
+    };
+  }
+
+  static formatSocket(publicKey: string, socket: {network: string, addr: string}): NodeSocket {
+    if (config.LIGHTNING.BACKEND === 'cln') {
+      return {
+        publicKey: publicKey,
+        network: socket.network,
+        addr: socket.addr,
+      };
+    } else /* if (config.LIGHTNING.BACKEND === 'lnd') */ {
+      const formatted = this.findSocketNetwork(socket.addr);
+      return {
+        publicKey: publicKey,
+        network: formatted.network,
+        addr: formatted.url,
+      };
+    }
+  }
 }

backend/src/api/database-migration.ts

@@ -1,75 +1,626 @@
 import config from '../config';
-import { DB } from '../database';
+import DB from '../database';
 import logger from '../logger';
+import { Common } from './common';
 
 class DatabaseMigration {
-  private static currentVersion = 1;
-  private queryTimeout = 120000;
+  private static currentVersion = 49;
+  private queryTimeout = 3600_000;
+  private statisticsAddedIndexed = false;
+  private uniqueLogs: string[] = [];
 
-  constructor() { }
+  private blocksTruncatedMessage = `'blocks' table has been truncated.`;
+  private hashratesTruncatedMessage = `'hashrates' table has been truncated.`;
 
+  /**
+   * Avoid printing multiple time the same message
+   */
+  private uniqueLog(loggerFunction: any, msg: string) {
+    if (this.uniqueLogs.includes(msg)) {
+      return;
+    }
+    this.uniqueLogs.push(msg);
+    loggerFunction(msg);
+  }
+
+  /**
+   * Entry point
+   */
   public async $initializeOrMigrateDatabase(): Promise<void> {
-    if (!await this.$checkIfTableExists('statistics')) {
-      await this.$initializeDatabaseTables();
-    }
+    logger.debug('MIGRATIONS: Running migrations');
 
-    if (await this.$checkIfTableExists('state')) {
-      const databaseSchemaVersion = await this.$getSchemaVersionFromDatabase();
-      if (DatabaseMigration.currentVersion > databaseSchemaVersion) {
-        await this.$migrateTableSchemaFromVersion(databaseSchemaVersion);
+    await this.$printDatabaseVersion();
+
+    // First of all, if the `state` database does not exist, create it so we can track migration version
+    if (!await this.$checkIfTableExists('state')) {
+      logger.debug('MIGRATIONS: `state` table does not exist. Creating it.');
+      try {
+        await this.$createMigrationStateTable();
+      } catch (e) {
+        logger.err('MIGRATIONS: Unable to create `state` table, aborting in 10 seconds. ' + e);
+        await Common.sleep$(10000);
+        process.exit(-1);
       }
-    } else {
-      await this.$migrateTableSchemaFromVersion(0);
+      logger.debug('MIGRATIONS: `state` table initialized.');
+    }
+
+    let databaseSchemaVersion = 0;
+    try {
+      databaseSchemaVersion = await this.$getSchemaVersionFromDatabase();
+    } catch (e) {
+      logger.err('MIGRATIONS: Unable to get current database migration version, aborting in 10 seconds. ' + e);
+      await Common.sleep$(10000);
+      process.exit(-1);
+    }
+
+    if (databaseSchemaVersion === 0) {
+      logger.info('Initializing database (first run, clean install)');
+    }
+
+    if (databaseSchemaVersion <= 2) {
+      // Disable some spam logs when they're not relevant
+      this.uniqueLogs.push(this.blocksTruncatedMessage);
+      this.uniqueLogs.push(this.hashratesTruncatedMessage);
+    }
+
+    logger.debug('MIGRATIONS: Current state.schema_version ' + databaseSchemaVersion);
+    logger.debug('MIGRATIONS: Latest DatabaseMigration.version is ' + DatabaseMigration.currentVersion);
+    if (databaseSchemaVersion >= DatabaseMigration.currentVersion) {
+      logger.debug('MIGRATIONS: Nothing to do.');
+      return;
+    }
+
+    // Now, create missing tables. Those queries cannot be wrapped into a transaction unfortunately
+    try {
+      await this.$createMissingTablesAndIndexes(databaseSchemaVersion);
+    } catch (e) {
+      logger.err('MIGRATIONS: Unable to create required tables, aborting in 10 seconds. ' + e);
+      await Common.sleep$(10000);
+      process.exit(-1);
+    }
+
+    if (DatabaseMigration.currentVersion > databaseSchemaVersion) {
+      try {
+        await this.$migrateTableSchemaFromVersion(databaseSchemaVersion);
+        if (databaseSchemaVersion === 0) {
+          logger.notice(`MIGRATIONS: OK. Database schema has been properly initialized to version ${DatabaseMigration.currentVersion} (latest version)`);          
+        } else {
+          logger.notice(`MIGRATIONS: OK. Database schema have been migrated from version ${databaseSchemaVersion} to ${DatabaseMigration.currentVersion} (latest version)`);
+        }
+      } catch (e) {
+        logger.err('MIGRATIONS: Unable to migrate database, aborting. ' + e);
+      }
+    }
+
+    return;
+  }
+
+  /**
+   * Create all missing tables
+   */
+  private async $createMissingTablesAndIndexes(databaseSchemaVersion: number) {
+    await this.$setStatisticsAddedIndexedFlag(databaseSchemaVersion);
+
+    const isBitcoin = ['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK);
+
+    await this.$executeQuery(this.getCreateElementsTableQuery(), await this.$checkIfTableExists('elements_pegs'));
+    await this.$executeQuery(this.getCreateStatisticsQuery(), await this.$checkIfTableExists('statistics'));
+    if (databaseSchemaVersion < 2 && this.statisticsAddedIndexed === false) {
+      await this.$executeQuery(`CREATE INDEX added ON statistics (added);`);
+      await this.updateToSchemaVersion(2);
+    }
+    if (databaseSchemaVersion < 3) {
+      await this.$executeQuery(this.getCreatePoolsTableQuery(), await this.$checkIfTableExists('pools'));
+      await this.updateToSchemaVersion(3);
+    }
+    if (databaseSchemaVersion < 4) {
+      await this.$executeQuery('DROP table IF EXISTS blocks;');
+      await this.$executeQuery(this.getCreateBlocksTableQuery(), await this.$checkIfTableExists('blocks'));
+      await this.updateToSchemaVersion(4);
+    }
+    if (databaseSchemaVersion < 5 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      await this.$executeQuery('TRUNCATE blocks;'); // Need to re-index
+      await this.$executeQuery('ALTER TABLE blocks ADD `reward` double unsigned NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(5);
+    }
+
+    if (databaseSchemaVersion < 6 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      await this.$executeQuery('TRUNCATE blocks;');  // Need to re-index
+      // Cleanup original blocks fields type
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `height` integer unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `tx_count` smallint unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `size` integer unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `weight` integer unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `difficulty` double NOT NULL DEFAULT "0"');
+      // We also fix the pools.id type so we need to drop/re-create the foreign key
+      await this.$executeQuery('ALTER TABLE blocks DROP FOREIGN KEY IF EXISTS `blocks_ibfk_1`');
+      await this.$executeQuery('ALTER TABLE pools MODIFY `id` smallint unsigned AUTO_INCREMENT');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `pool_id` smallint unsigned NULL');
+      await this.$executeQuery('ALTER TABLE blocks ADD FOREIGN KEY (`pool_id`) REFERENCES `pools` (`id`)');
+      // Add new block indexing fields
+      await this.$executeQuery('ALTER TABLE blocks ADD `version` integer unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks ADD `bits` integer unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks ADD `nonce` bigint unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks ADD `merkle_root` varchar(65) NOT NULL DEFAULT ""');
+      await this.$executeQuery('ALTER TABLE blocks ADD `previous_block_hash` varchar(65) NULL');
+      await this.updateToSchemaVersion(6);
+    }
+
+    if (databaseSchemaVersion < 7 && isBitcoin === true) {
+      await this.$executeQuery('DROP table IF EXISTS hashrates;');
+      await this.$executeQuery(this.getCreateDailyStatsTableQuery(), await this.$checkIfTableExists('hashrates'));
+      await this.updateToSchemaVersion(7);
+    }
+
+    if (databaseSchemaVersion < 8 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      await this.$executeQuery('TRUNCATE hashrates;'); // Need to re-index
+      await this.$executeQuery('ALTER TABLE `hashrates` DROP INDEX `PRIMARY`');
+      await this.$executeQuery('ALTER TABLE `hashrates` ADD `id` int NOT NULL AUTO_INCREMENT PRIMARY KEY FIRST');
+      await this.$executeQuery('ALTER TABLE `hashrates` ADD `share` float NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `hashrates` ADD `type` enum("daily", "weekly") DEFAULT "daily"');
+      await this.updateToSchemaVersion(8);
+    }
+
+    if (databaseSchemaVersion < 9 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.hashratesTruncatedMessage);
+      await this.$executeQuery('TRUNCATE hashrates;'); // Need to re-index
+      await this.$executeQuery('ALTER TABLE `state` CHANGE `name` `name` varchar(100)');
+      await this.$executeQuery('ALTER TABLE `hashrates` ADD UNIQUE `hashrate_timestamp_pool_id` (`hashrate_timestamp`, `pool_id`)');
+      await this.updateToSchemaVersion(9);
+    }
+
+    if (databaseSchemaVersion < 10 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks` ADD INDEX `blockTimestamp` (`blockTimestamp`)');
+      await this.updateToSchemaVersion(10);
+    }
+
+    if (databaseSchemaVersion < 11 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      await this.$executeQuery('TRUNCATE blocks;'); // Need to re-index
+      await this.$executeQuery(`ALTER TABLE blocks
+        ADD avg_fee INT UNSIGNED NULL,
+        ADD avg_fee_rate INT UNSIGNED NULL
+      `);
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `reward` BIGINT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `median_fee` INT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `fees` INT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(11);
+    }
+
+    if (databaseSchemaVersion < 12 && isBitcoin === true) {
+      // No need to re-index because the new data type can contain larger values
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `fees` BIGINT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(12);
+    }
+
+    if (databaseSchemaVersion < 13 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `difficulty` DOUBLE UNSIGNED NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `median_fee` BIGINT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `avg_fee` BIGINT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE blocks MODIFY `avg_fee_rate` BIGINT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(13);
+    }
+
+    if (databaseSchemaVersion < 14 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.hashratesTruncatedMessage);
+      await this.$executeQuery('TRUNCATE hashrates;'); // Need to re-index
+      await this.$executeQuery('ALTER TABLE `hashrates` DROP FOREIGN KEY `hashrates_ibfk_1`');
+      await this.$executeQuery('ALTER TABLE `hashrates` MODIFY `pool_id` SMALLINT UNSIGNED NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(14);
+    }
+
+    if (databaseSchemaVersion < 16 && isBitcoin === true) {
+      this.uniqueLog(logger.notice, this.hashratesTruncatedMessage);
+      await this.$executeQuery('TRUNCATE hashrates;'); // Need to re-index because we changed timestamps
+      await this.updateToSchemaVersion(16);
+    }
+
+    if (databaseSchemaVersion < 17 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `pools` ADD `slug` CHAR(50) NULL');
+      await this.updateToSchemaVersion(17);
+    }
+
+    if (databaseSchemaVersion < 18 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks` ADD INDEX `hash` (`hash`);');
+      await this.updateToSchemaVersion(18);
+    }
+
+    if (databaseSchemaVersion < 19) {
+      await this.$executeQuery(this.getCreateRatesTableQuery(), await this.$checkIfTableExists('rates'));
+      await this.updateToSchemaVersion(19);
+    }
+
+    if (databaseSchemaVersion < 20 && isBitcoin === true) {
+      await this.$executeQuery(this.getCreateBlocksSummariesTableQuery(), await this.$checkIfTableExists('blocks_summaries'));
+      await this.updateToSchemaVersion(20);
+    }
+
+    if (databaseSchemaVersion < 21) {
+      await this.$executeQuery('DROP TABLE IF EXISTS `rates`');
+      await this.$executeQuery(this.getCreatePricesTableQuery(), await this.$checkIfTableExists('prices'));
+      await this.updateToSchemaVersion(21);
+    }
+
+    if (databaseSchemaVersion < 22 && isBitcoin === true) {
+      await this.$executeQuery('DROP TABLE IF EXISTS `difficulty_adjustments`');
+      await this.$executeQuery(this.getCreateDifficultyAdjustmentsTableQuery(), await this.$checkIfTableExists('difficulty_adjustments'));
+      await this.updateToSchemaVersion(22);
+    }
+
+    if (databaseSchemaVersion < 23) {
+      await this.$executeQuery('TRUNCATE `prices`');
+      await this.$executeQuery('ALTER TABLE `prices` DROP `avg_prices`');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `USD` float DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `EUR` float DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `GBP` float DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `CAD` float DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `CHF` float DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `AUD` float DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `prices` ADD `JPY` float DEFAULT "0"');
+      await this.updateToSchemaVersion(23);
+    }
+
+    if (databaseSchemaVersion < 24 && isBitcoin == true) {
+      await this.$executeQuery('DROP TABLE IF EXISTS `blocks_audits`');
+      await this.$executeQuery(this.getCreateBlocksAuditsTableQuery(), await this.$checkIfTableExists('blocks_audits'));
+      await this.updateToSchemaVersion(24);
+    }
+
+    if (databaseSchemaVersion < 25 && isBitcoin === true) {
+      await this.$executeQuery(this.getCreateLightningStatisticsQuery(), await this.$checkIfTableExists('lightning_stats'));
+      await this.$executeQuery(this.getCreateNodesQuery(), await this.$checkIfTableExists('nodes'));
+      await this.$executeQuery(this.getCreateChannelsQuery(), await this.$checkIfTableExists('channels'));
+      await this.$executeQuery(this.getCreateNodesStatsQuery(), await this.$checkIfTableExists('node_stats'));
+      await this.updateToSchemaVersion(25);
+    }
+
+    if (databaseSchemaVersion < 26 && isBitcoin === true) {
+      if (config.LIGHTNING.ENABLED) {
+        this.uniqueLog(logger.notice, `'lightning_stats' table has been truncated.`);
+      }
+      await this.$executeQuery(`TRUNCATE lightning_stats`);
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD tor_nodes int(11) NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD clearnet_nodes int(11) NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD unannounced_nodes int(11) NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(26);
+    }
+
+    if (databaseSchemaVersion < 27 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD avg_capacity bigint(20) unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD avg_fee_rate int(11) unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD avg_base_fee_mtokens bigint(20) unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD med_capacity bigint(20) unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD med_fee_rate int(11) unsigned NOT NULL DEFAULT "0"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD med_base_fee_mtokens bigint(20) unsigned NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(27);
+    }
+    
+    if (databaseSchemaVersion < 28 && isBitcoin === true) {
+      if (config.LIGHTNING.ENABLED) {
+        this.uniqueLog(logger.notice, `'lightning_stats' and 'node_stats' tables have been truncated.`);
+      }
+      await this.$executeQuery(`TRUNCATE lightning_stats`);
+      await this.$executeQuery(`TRUNCATE node_stats`);
+      await this.$executeQuery(`ALTER TABLE lightning_stats MODIFY added DATE`);
+      await this.updateToSchemaVersion(28);
+    }
+
+    if (databaseSchemaVersion < 29 && isBitcoin === true) {
+      await this.$executeQuery(this.getCreateGeoNamesTableQuery(), await this.$checkIfTableExists('geo_names'));
+      await this.$executeQuery('ALTER TABLE `nodes` ADD as_number int(11) unsigned NULL DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD city_id int(11) unsigned NULL DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD country_id int(11) unsigned NULL DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD accuracy_radius int(11) unsigned NULL DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD subdivision_id int(11) unsigned NULL DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD longitude double NULL DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD latitude double NULL DEFAULT NULL');
+      await this.updateToSchemaVersion(29);
+    }
+
+    if (databaseSchemaVersion < 30 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `geo_names` CHANGE `type` `type` enum("city","country","division","continent","as_organization") NOT NULL');
+      await this.updateToSchemaVersion(30);
+    }
+
+    if (databaseSchemaVersion < 31 && isBitcoin == true) { // Link blocks to prices
+      await this.$executeQuery('ALTER TABLE `prices` ADD `id` int NULL AUTO_INCREMENT UNIQUE');
+      await this.$executeQuery('DROP TABLE IF EXISTS `blocks_prices`');
+      await this.$executeQuery(this.getCreateBlocksPricesTableQuery(), await this.$checkIfTableExists('blocks_prices'));
+      await this.updateToSchemaVersion(31);
+    }
+
+    if (databaseSchemaVersion < 32 && isBitcoin == true) {
+      await this.$executeQuery('ALTER TABLE `blocks_summaries` ADD `template` JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(32);
+    }
+
+    if (databaseSchemaVersion < 33 && isBitcoin == true) {
+      await this.$executeQuery('ALTER TABLE `geo_names` CHANGE `type` `type` enum("city","country","division","continent","as_organization", "country_iso_code") NOT NULL');
+      await this.updateToSchemaVersion(33);
+    }
+
+    if (databaseSchemaVersion < 34 && isBitcoin == true) {
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD clearnet_tor_nodes int(11) NOT NULL DEFAULT "0"');
+      await this.updateToSchemaVersion(34);
+    }
+
+    if (databaseSchemaVersion < 35 && isBitcoin == true) {
+      await this.$executeQuery('DELETE from `lightning_stats` WHERE added > "2021-09-19"');
+      await this.$executeQuery('ALTER TABLE `lightning_stats` ADD CONSTRAINT added_unique UNIQUE (added);');
+      await this.updateToSchemaVersion(35);
+    }
+
+    if (databaseSchemaVersion < 36 && isBitcoin == true) {
+      await this.$executeQuery('ALTER TABLE `nodes` ADD status TINYINT NOT NULL DEFAULT "1"');
+      await this.updateToSchemaVersion(36);
+    }
+
+    if (databaseSchemaVersion < 37 && isBitcoin == true) {
+      await this.$executeQuery(this.getCreateLNNodesSocketsTableQuery(), await this.$checkIfTableExists('nodes_sockets'));
+      await this.updateToSchemaVersion(37);
+    }
+
+    if (databaseSchemaVersion < 38 && isBitcoin == true) {
+      if (config.LIGHTNING.ENABLED) {
+        this.uniqueLog(logger.notice, `'lightning_stats' and 'node_stats' tables have been truncated.`);
+      }
+      await this.$executeQuery(`TRUNCATE lightning_stats`);
+      await this.$executeQuery(`TRUNCATE node_stats`);
+      await this.$executeQuery('ALTER TABLE `lightning_stats` CHANGE `added` `added` timestamp NULL');
+      await this.$executeQuery('ALTER TABLE `node_stats` CHANGE `added` `added` timestamp NULL');
+      await this.updateToSchemaVersion(38);
+    }
+
+    if (databaseSchemaVersion < 39 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `nodes` ADD alias_search TEXT NULL DEFAULT NULL AFTER `alias`');
+      await this.$executeQuery('ALTER TABLE nodes ADD FULLTEXT(alias_search)');
+      await this.updateToSchemaVersion(39);
+    }
+
+    if (databaseSchemaVersion < 40 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `nodes` ADD capacity bigint(20) unsigned DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD channels int(11) unsigned DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `nodes` ADD INDEX `capacity` (`capacity`);');
+      await this.updateToSchemaVersion(40);
+    }
+
+    if (databaseSchemaVersion < 41 && isBitcoin === true) {
+      await this.$executeQuery('UPDATE channels SET closing_reason = NULL WHERE closing_reason = 1');
+      await this.updateToSchemaVersion(41);
+    }
+
+    if (databaseSchemaVersion < 42 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `channels` ADD closing_resolved tinyint(1) DEFAULT 0');
+      await this.updateToSchemaVersion(42);
+    }
+
+    if (databaseSchemaVersion < 43 && isBitcoin === true) {
+      await this.$executeQuery(this.getCreateLNNodeRecordsTableQuery(), await this.$checkIfTableExists('nodes_records'));
+      await this.updateToSchemaVersion(43);
+    }
+
+    if (databaseSchemaVersion < 44 && isBitcoin === true) {
+      await this.$executeQuery('UPDATE blocks_summaries SET template = NULL');
+      await this.updateToSchemaVersion(44);
+    }
+
+    if (databaseSchemaVersion < 45 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD fresh_txs JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(45);
+    }
+
+    if (databaseSchemaVersion < 46) {
+      await this.$executeQuery(`ALTER TABLE blocks MODIFY blockTimestamp timestamp NOT NULL DEFAULT 0`);
+      await this.updateToSchemaVersion(46);
+    }
+
+    if (databaseSchemaVersion < 47) {
+      await this.$executeQuery('ALTER TABLE `blocks` ADD cpfp_indexed tinyint(1) DEFAULT 0');
+      await this.$executeQuery(this.getCreateCPFPTableQuery(), await this.$checkIfTableExists('cpfp_clusters'));
+      await this.$executeQuery(this.getCreateTransactionsTableQuery(), await this.$checkIfTableExists('transactions'));
+      await this.updateToSchemaVersion(47);
+    }
+
+    if (databaseSchemaVersion < 48 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `channels` ADD source_checked tinyint(1) DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD closing_fee bigint(20) unsigned DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD node1_funding_balance bigint(20) unsigned DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD node2_funding_balance bigint(20) unsigned DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD node1_closing_balance bigint(20) unsigned DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD node2_closing_balance bigint(20) unsigned DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD funding_ratio float unsigned DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `channels` ADD closed_by varchar(66) DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `channels` ADD single_funded tinyint(1) DEFAULT 0');
+      await this.$executeQuery('ALTER TABLE `channels` ADD outputs JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(48);
+    }
+
+    if (databaseSchemaVersion < 49 && isBitcoin === true) {
+      await this.$executeQuery('TRUNCATE TABLE `blocks_audits`');
+      await this.updateToSchemaVersion(49);
     }
   }
 
-  private async $initializeDatabaseTables(): Promise<void> {
-    const connection = await DB.pool.getConnection();
-    for (const query of this.getInitializeTableQueries()) {
-      await connection.query<any>({ sql: query, timeout: this.queryTimeout });
+  /**
+   * Special case here for the `statistics` table - It appeared that somehow some dbs already had the `added` field indexed
+   * while it does not appear in previous schemas. The mariadb command "CREATE INDEX IF NOT EXISTS" is not supported on
+   * older mariadb version. Therefore we set a flag here in order to know if the index needs to be created or not before
+   * running the migration process
+   */
+  private async $setStatisticsAddedIndexedFlag(databaseSchemaVersion: number) {
+    if (databaseSchemaVersion >= 2) {
+      this.statisticsAddedIndexed = true;
+      return;
     }
-    connection.release();
-    logger.info(`Initial database tables have been created`);
-  }
 
-  private async $migrateTableSchemaFromVersion(version: number): Promise<void> {
-    const connection = await DB.pool.getConnection();
-    for (const query of this.getMigrationQueriesFromVersion(version)) {
-      await connection.query<any>({ sql: query, timeout: this.queryTimeout });
+    try {
+      // We don't use "CREATE INDEX IF NOT EXISTS" because it is not supported on old mariadb version 5.X
+      const query = `SELECT COUNT(1) hasIndex FROM INFORMATION_SCHEMA.STATISTICS
+        WHERE table_schema=DATABASE() AND table_name='statistics' AND index_name='added';`;
+      const [rows] = await this.$executeQuery(query, true);
+      if (rows[0].hasIndex === 0) {
+        logger.debug('MIGRATIONS: `statistics.added` is not indexed');
+        this.statisticsAddedIndexed = false;
+      } else if (rows[0].hasIndex === 1) {
+        logger.debug('MIGRATIONS: `statistics.added` is already indexed');
+        this.statisticsAddedIndexed = true;
+      }
+    } catch (e) {
+      // Should really never happen but just in case it fails, we just don't execute
+      // any query related to this indexing so it won't fail if the index actually already exists
+      logger.err('MIGRATIONS: Unable to check if `statistics.added` INDEX exist or not.');
+      this.statisticsAddedIndexed = true;
     }
-    connection.release();
-    await this.$updateToLatestSchemaVersion();
-    logger.info(`Database schema have been migrated from version ${version} to ${DatabaseMigration.currentVersion} (latest version)`);
   }
 
-  private async $getSchemaVersionFromDatabase(): Promise<number> {
-    const connection = await DB.pool.getConnection();
-    const query = `SELECT number FROM state WHERE name = 'schema_version';`;
-    const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-    connection.release();
-    return rows[0]['number'];
-  }
-
-  private async $updateToLatestSchemaVersion(): Promise<void> {
-    const connection = await DB.pool.getConnection();
-    const query = `UPDATE state SET number = ${DatabaseMigration.currentVersion} WHERE name = 'schema_version'`;
-    const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-    connection.release();
+  /**
+   * Small query execution wrapper to log all executed queries
+   */
+  private async $executeQuery(query: string, silent = false): Promise<any> {
+    if (!silent) {
+      logger.debug('MIGRATIONS: Execute query:\n' + query);
+    }
+    return DB.query({ sql: query, timeout: this.queryTimeout });
   }
 
+  /**
+   * Check if 'table' exists in the database
+   */
   private async $checkIfTableExists(table: string): Promise<boolean> {
-    const connection = await DB.pool.getConnection();
     const query = `SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = '${config.DATABASE.DATABASE}' AND TABLE_NAME = '${table}'`;
-    const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-    connection.release();
+    const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
     return rows[0]['COUNT(*)'] === 1;
   }
 
-  private getInitializeTableQueries(): string[] {
-    const queries: string[] = [];
+  /**
+   * Get current database version
+   */
+  private async $getSchemaVersionFromDatabase(): Promise<number> {
+    const query = `SELECT number FROM state WHERE name = 'schema_version';`;
+    const [rows] = await this.$executeQuery(query, true);
+    return rows[0]['number'];
+  }
 
-    queries.push(`CREATE TABLE IF NOT EXISTS statistics (
-      id int(11) NOT NULL,
+  /**
+   * Create the `state` table
+   */
+  private async $createMigrationStateTable(): Promise<void> {
+    const query = `CREATE TABLE IF NOT EXISTS state (
+      name varchar(25) NOT NULL,
+      number int(11) NULL,
+      string varchar(100) NULL,
+      CONSTRAINT name_unique UNIQUE (name)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+    await this.$executeQuery(query);
+
+    // Set initial values
+    await this.$executeQuery(`INSERT INTO state VALUES('schema_version', 0, NULL);`);
+    await this.$executeQuery(`INSERT INTO state VALUES('last_elements_block', 0, NULL);`);
+  }
+
+  /**
+   * We actually execute the migrations queries here
+   */
+  private async $migrateTableSchemaFromVersion(version: number): Promise<void> {
+    const transactionQueries: string[] = [];
+    for (const query of this.getMigrationQueriesFromVersion(version)) {
+      transactionQueries.push(query);
+    }
+
+    logger.notice(`MIGRATIONS: ${version > 0 ? 'Upgrading' : 'Initializing'} database schema version number to ${DatabaseMigration.currentVersion}`);
+    transactionQueries.push(this.getUpdateToLatestSchemaVersionQuery());
+
+    try {
+      await this.$executeQuery('START TRANSACTION;');
+      for (const query of transactionQueries) {
+        await this.$executeQuery(query);
+      }
+      await this.$executeQuery('COMMIT;');
+    } catch (e) {
+      await this.$executeQuery('ROLLBACK;');
+      throw e;
+    }
+  }
+
+  /**
+   * Generate migration queries based on schema version
+   */
+  private getMigrationQueriesFromVersion(version: number): string[] {
+    const queries: string[] = [];
+    const isBitcoin = ['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK);
+
+    if (version < 1) {
+      if (config.MEMPOOL.NETWORK !== 'liquid' && config.MEMPOOL.NETWORK !== 'liquidtestnet') {
+        if (version > 0) {
+          logger.notice(`MIGRATIONS: Migrating (shifting) statistics table data`);
+        }
+        queries.push(this.getShiftStatisticsQuery());
+      }
+    }
+
+    if (version < 7 && isBitcoin === true) {
+      queries.push(`INSERT INTO state(name, number, string) VALUES ('last_hashrates_indexing', 0, NULL)`);
+    }
+
+    if (version < 9  && isBitcoin === true) {
+      queries.push(`INSERT INTO state(name, number, string) VALUES ('last_weekly_hashrates_indexing', 0, NULL)`);
+    }
+
+    return queries;
+  }
+
+  /**
+   * Save the schema version in the database
+   */
+  private getUpdateToLatestSchemaVersionQuery(): string {
+    return `UPDATE state SET number = ${DatabaseMigration.currentVersion} WHERE name = 'schema_version';`;
+  }
+
+  private async updateToSchemaVersion(version): Promise<void> {
+    await this.$executeQuery(`UPDATE state SET number = ${version} WHERE name = 'schema_version';`);
+  }
+
+  /**
+   * Print current database version
+   */
+  private async $printDatabaseVersion() {
+    try {
+      const [rows] = await this.$executeQuery('SELECT VERSION() as version;', true);
+      logger.debug(`MIGRATIONS: Database engine version '${rows[0].version}'`);
+    } catch (e) {
+      logger.debug(`MIGRATIONS: Could not fetch database engine version. ` + e);
+    }
+  }
+
+  // Couple of wrappers to clean the main logic
+  private getShiftStatisticsQuery(): string {
+    return `UPDATE statistics SET
+      vsize_1 = vsize_1 + vsize_2, vsize_2 = vsize_3,
+      vsize_3 = vsize_4, vsize_4 = vsize_5,
+      vsize_5 = vsize_6, vsize_6 = vsize_8,
+      vsize_8 = vsize_10, vsize_10 = vsize_12,
+      vsize_12 = vsize_15, vsize_15 = vsize_20,
+      vsize_20 = vsize_30, vsize_30 = vsize_40,
+      vsize_40 = vsize_50, vsize_50 = vsize_60,
+      vsize_60 = vsize_70, vsize_70 = vsize_80,
+      vsize_80 = vsize_90, vsize_90 = vsize_100,
+      vsize_100 = vsize_125, vsize_125 = vsize_150,
+      vsize_150 = vsize_175, vsize_175 = vsize_200,
+      vsize_200 = vsize_250, vsize_250 = vsize_300,
+      vsize_300 = vsize_350, vsize_350 = vsize_400,
+      vsize_400 = vsize_500, vsize_500 = vsize_600,
+      vsize_600 = vsize_700, vsize_700 = vsize_800,
+      vsize_800 = vsize_900, vsize_900 = vsize_1000,
+      vsize_1000 = vsize_1200, vsize_1200 = vsize_1400,
+      vsize_1400 = vsize_1800, vsize_1800 = vsize_2000, vsize_2000 = 0;`;
+  }
+
+  private getCreateStatisticsQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS statistics (
+      id int(11) NOT NULL AUTO_INCREMENT,
       added datetime NOT NULL,
       unconfirmed_transactions int(11) UNSIGNED NOT NULL,
       tx_per_second float UNSIGNED NOT NULL,
@@ -114,64 +665,273 @@ class DatabaseMigration {
       vsize_1400 int(11) NOT NULL,
       vsize_1600 int(11) NOT NULL,
       vsize_1800 int(11) NOT NULL,
-      vsize_2000 int(11) NOT NULL
-    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`);
-
-    queries.push(`ALTER TABLE statistics ADD PRIMARY KEY (id);`);
-    queries.push(`ALTER TABLE statistics MODIFY id int(11) NOT NULL AUTO_INCREMENT;`);
-
-    return queries;
+      vsize_2000 int(11) NOT NULL,
+      CONSTRAINT PRIMARY KEY (id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
   }
 
-  private getMigrationQueriesFromVersion(version: number): string[] {
-    const queries: string[] = [];
+  private getCreateElementsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS elements_pegs (
+      block int(11) NOT NULL,
+      datetime int(11) NOT NULL,
+      amount bigint(20) NOT NULL,
+      txid varchar(65) NOT NULL,
+      txindex int(11) NOT NULL,
+      bitcoinaddress varchar(100) NOT NULL,
+      bitcointxid varchar(65) NOT NULL,
+      bitcoinindex int(11) NOT NULL,
+      final_tx int(11) NOT NULL
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
 
-    if (version < 1) {
-      if (config.MEMPOOL.NETWORK !== 'liquid') {
-        queries.push(`UPDATE statistics SET
-          vsize_1 = vsize_1 + vsize_2, vsize_2 = vsize_3,
-          vsize_3 = vsize_4, vsize_4 = vsize_5,
-          vsize_5 = vsize_6, vsize_6 = vsize_8,
-          vsize_8 = vsize_10, vsize_10 = vsize_12,
-          vsize_12 = vsize_15, vsize_15 = vsize_20,
-          vsize_20 = vsize_30, vsize_30 = vsize_40,
-          vsize_40 = vsize_50, vsize_50 = vsize_60,
-          vsize_60 = vsize_70, vsize_70 = vsize_80,
-          vsize_80 = vsize_90, vsize_90 = vsize_100,
-          vsize_100 = vsize_125, vsize_125 = vsize_150,
-          vsize_150 = vsize_175, vsize_175 = vsize_200,
-          vsize_200 = vsize_250, vsize_250 = vsize_300,
-          vsize_300 = vsize_350, vsize_350 = vsize_400,
-          vsize_400 = vsize_500, vsize_500 = vsize_600,
-          vsize_600 = vsize_700, vsize_700 = vsize_800,
-          vsize_800 = vsize_900, vsize_900 = vsize_1000,
-          vsize_1000 = vsize_1200, vsize_1200 = vsize_1400,
-          vsize_1400 = vsize_1800, vsize_1800 = vsize_2000, vsize_2000 = 0`);
+  private getCreatePoolsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS pools (
+      id int(11) NOT NULL AUTO_INCREMENT,
+      name varchar(50) NOT NULL,
+      link varchar(255) NOT NULL,
+      addresses text NOT NULL,
+      regexes text NOT NULL,
+      PRIMARY KEY (id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;`;
+  }
+
+  private getCreateBlocksTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS blocks (
+      height int(11) unsigned NOT NULL,
+      hash varchar(65) NOT NULL,
+      blockTimestamp timestamp NOT NULL,
+      size int(11) unsigned NOT NULL,
+      weight int(11) unsigned NOT NULL,
+      tx_count int(11) unsigned NOT NULL,
+      coinbase_raw text,
+      difficulty bigint(20) unsigned NOT NULL,
+      pool_id int(11) DEFAULT -1,
+      fees double unsigned NOT NULL,
+      fee_span json NOT NULL,
+      median_fee double unsigned NOT NULL,
+      PRIMARY KEY (height),
+      INDEX (pool_id),
+      FOREIGN KEY (pool_id) REFERENCES pools (id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateDailyStatsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS hashrates (
+      hashrate_timestamp timestamp NOT NULL,
+      avg_hashrate double unsigned DEFAULT '0',
+      pool_id smallint unsigned NULL,
+      PRIMARY KEY (hashrate_timestamp),
+      INDEX (pool_id),
+      FOREIGN KEY (pool_id) REFERENCES pools (id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateRatesTableQuery(): string { // This table has been replaced by the prices table
+    return `CREATE TABLE IF NOT EXISTS rates (
+      height int(10) unsigned NOT NULL,
+      bisq_rates JSON NOT NULL,
+      PRIMARY KEY (height)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateBlocksSummariesTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS blocks_summaries (
+      height int(10) unsigned NOT NULL,
+      id varchar(65) NOT NULL,
+      transactions JSON NOT NULL,
+      PRIMARY KEY (id),
+      INDEX (height)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreatePricesTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS prices (
+      time timestamp NOT NULL,
+      avg_prices JSON NOT NULL,
+      PRIMARY KEY (time)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateDifficultyAdjustmentsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS difficulty_adjustments (
+      time timestamp NOT NULL,
+      height int(10) unsigned NOT NULL,
+      difficulty double unsigned NOT NULL,
+      adjustment float NOT NULL,
+      PRIMARY KEY (height),
+      INDEX (time)
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateLightningStatisticsQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS lightning_stats (
+      id int(11) NOT NULL AUTO_INCREMENT,
+      added datetime NOT NULL,
+      channel_count int(11) NOT NULL,
+      node_count int(11) NOT NULL,
+      total_capacity double unsigned NOT NULL,
+      PRIMARY KEY (id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateNodesQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS nodes (
+      public_key varchar(66) NOT NULL,
+      first_seen datetime NOT NULL,
+      updated_at datetime NOT NULL,
+      alias varchar(200) CHARACTER SET utf8mb4 NOT NULL,
+      color varchar(200) NOT NULL,
+      sockets text DEFAULT NULL,
+      PRIMARY KEY (public_key),
+      KEY alias (alias(10))
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateChannelsQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS channels (
+      id bigint(11) unsigned NOT NULL,
+      short_id varchar(15) NOT NULL DEFAULT '',
+      capacity bigint(20) unsigned NOT NULL,
+      transaction_id varchar(64) NOT NULL,
+      transaction_vout int(11) NOT NULL,
+      updated_at datetime DEFAULT NULL,
+      created datetime DEFAULT NULL,
+      status int(11) NOT NULL DEFAULT 0,
+      closing_transaction_id varchar(64) DEFAULT NULL,
+      closing_date datetime DEFAULT NULL,
+      closing_reason int(11) DEFAULT NULL,
+      node1_public_key varchar(66) NOT NULL,
+      node1_base_fee_mtokens bigint(20) unsigned DEFAULT NULL,
+      node1_cltv_delta int(11) DEFAULT NULL,
+      node1_fee_rate bigint(11) DEFAULT NULL,
+      node1_is_disabled tinyint(1) DEFAULT NULL,
+      node1_max_htlc_mtokens bigint(20) unsigned DEFAULT NULL,
+      node1_min_htlc_mtokens bigint(20) DEFAULT NULL,
+      node1_updated_at datetime DEFAULT NULL,
+      node2_public_key varchar(66) NOT NULL,
+      node2_base_fee_mtokens bigint(20) unsigned DEFAULT NULL,
+      node2_cltv_delta int(11) DEFAULT NULL,
+      node2_fee_rate bigint(11) DEFAULT NULL,
+      node2_is_disabled tinyint(1) DEFAULT NULL,
+      node2_max_htlc_mtokens bigint(20) unsigned DEFAULT NULL,
+      node2_min_htlc_mtokens bigint(20) unsigned DEFAULT NULL,
+      node2_updated_at datetime DEFAULT NULL,
+      PRIMARY KEY (id),
+      KEY node1_public_key (node1_public_key),
+      KEY node2_public_key (node2_public_key),
+      KEY status (status),
+      KEY short_id (short_id),
+      KEY transaction_id (transaction_id),
+      KEY closing_transaction_id (closing_transaction_id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateNodesStatsQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS node_stats (
+      id int(11) unsigned NOT NULL AUTO_INCREMENT,
+      public_key varchar(66) NOT NULL DEFAULT '',
+      added date NOT NULL,
+      capacity bigint(20) unsigned NOT NULL DEFAULT 0,
+      channels int(11) unsigned NOT NULL DEFAULT 0,
+      PRIMARY KEY (id),
+      UNIQUE KEY added (added,public_key),
+      KEY public_key (public_key)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateBlocksAuditsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS blocks_audits (
+      time timestamp NOT NULL,
+      hash varchar(65) NOT NULL,
+      height int(10) unsigned NOT NULL,
+      missing_txs JSON NOT NULL,
+      added_txs JSON NOT NULL,
+      match_rate float unsigned NOT NULL,
+      PRIMARY KEY (hash),
+      INDEX (height)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateGeoNamesTableQuery(): string {
+    return `CREATE TABLE geo_names (
+      id int(11) unsigned NOT NULL,
+      type enum('city','country','division','continent') NOT NULL,
+      names text DEFAULT NULL,
+      UNIQUE KEY id (id,type),
+      KEY id_2 (id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateBlocksPricesTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS blocks_prices (
+      height int(10) unsigned NOT NULL,
+      price_id int(10) unsigned NOT NULL,
+      PRIMARY KEY (height),
+      INDEX (price_id)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateLNNodesSocketsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS nodes_sockets (
+      public_key varchar(66) NOT NULL,
+      socket varchar(100) NOT NULL,
+      type enum('ipv4', 'ipv6', 'torv2', 'torv3', 'i2p', 'dns', 'websocket') NULL,
+      UNIQUE KEY public_key_socket (public_key, socket),
+      INDEX (public_key)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateLNNodeRecordsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS nodes_records (
+      public_key varchar(66) NOT NULL,
+      type int(10) unsigned NOT NULL,
+      payload blob NOT NULL,
+      UNIQUE KEY public_key_type (public_key, type),
+      INDEX (public_key),
+      FOREIGN KEY (public_key)
+        REFERENCES nodes (public_key)
+        ON DELETE CASCADE
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateCPFPTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS cpfp_clusters (
+      root varchar(65) NOT NULL,
+      height int(10) NOT NULL,
+      txs JSON DEFAULT NULL,
+      fee_rate double unsigned NOT NULL,
+      PRIMARY KEY (root)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  private getCreateTransactionsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS transactions (
+      txid varchar(65) NOT NULL,
+      cluster varchar(65) DEFAULT NULL,
+      PRIMARY KEY (txid),
+      FOREIGN KEY (cluster) REFERENCES cpfp_clusters (root) ON DELETE SET NULL
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  public async $truncateIndexedData(tables: string[]) {
+    const allowedTables = ['blocks', 'hashrates', 'prices'];
+
+    try {
+      for (const table of tables) {
+        if (!allowedTables.includes(table)) {
+          logger.debug(`Table ${table} cannot to be re-indexed (not allowed)`);
+          continue;
+        }
+
+        await this.$executeQuery(`TRUNCATE ${table}`, true);
+        if (table === 'hashrates') {
+          await this.$executeQuery('UPDATE state set number = 0 where name = "last_hashrates_indexing"', true);
+        }
+        logger.notice(`Table ${table} has been truncated`);
       }
-
-      queries.push(`CREATE TABLE IF NOT EXISTS elements_pegs (
-        block int(11) NOT NULL,
-        datetime int(11) NOT NULL,
-        amount bigint(20) NOT NULL,
-        txid varchar(65) NOT NULL,
-        txindex int(11) NOT NULL,
-        bitcoinaddress varchar(100) NOT NULL,
-        bitcointxid varchar(65) NOT NULL,
-        bitcoinindex int(11) NOT NULL,
-        final_tx int(11) NOT NULL
-      ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`);
-
-      queries.push(`CREATE TABLE IF NOT EXISTS state (
-        name varchar(25) NOT NULL,
-        number int(11) NULL,
-        string varchar(100) NULL
-      ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`);
-
-      queries.push(`INSERT INTO state VALUES('schema_version', 0, NULL);`);
-      queries.push(`INSERT INTO state VALUES('last_elements_block', 0, NULL);`);
+    } catch (e) {
+      logger.warn(`Unable to erase indexed data`);
     }
-
-    return queries;
   }
 }
 

backend/src/api/difficulty-adjustment.ts

@@ -0,0 +1,102 @@
+import config from '../config';
+import { IDifficultyAdjustment } from '../mempool.interfaces';
+import blocks from './blocks';
+
+export interface DifficultyAdjustment {
+  progressPercent: number;       // Percent: 0 to 100
+  difficultyChange: number;      // Percent: -75 to 300
+  estimatedRetargetDate: number; // Unix time in ms
+  remainingBlocks: number;       // Block count
+  remainingTime: number;         // Duration of time in ms
+  previousRetarget: number;      // Percent: -75 to 300
+  nextRetargetHeight: number;    // Block Height
+  timeAvg: number;               // Duration of time in ms
+  timeOffset: number;            // (Testnet) Time since last block (cap @ 20min) in ms
+}
+
+export function calcDifficultyAdjustment(
+  DATime: number,
+  nowSeconds: number,
+  blockHeight: number,
+  previousRetarget: number,
+  network: string,
+  latestBlockTimestamp: number,
+): DifficultyAdjustment {
+  const ESTIMATE_LAG_BLOCKS = 146; // For first 7.2% of epoch, don't estimate.
+  const EPOCH_BLOCK_LENGTH = 2016; // Bitcoin mainnet
+  const BLOCK_SECONDS_TARGET = 600; // Bitcoin mainnet
+  const TESTNET_MAX_BLOCK_SECONDS = 1200; // Bitcoin testnet
+
+  const diffSeconds = nowSeconds - DATime;
+  const blocksInEpoch = (blockHeight >= 0) ? blockHeight % EPOCH_BLOCK_LENGTH : 0;
+  const progressPercent = (blockHeight >= 0) ? blocksInEpoch / EPOCH_BLOCK_LENGTH * 100 : 100;
+  const remainingBlocks = EPOCH_BLOCK_LENGTH - blocksInEpoch;
+  const nextRetargetHeight = (blockHeight >= 0) ? blockHeight + remainingBlocks : 0;
+
+  let difficultyChange = 0;
+  let timeAvgSecs = BLOCK_SECONDS_TARGET;
+  // Only calculate the estimate once we have 7.2% of blocks in current epoch
+  if (blocksInEpoch >= ESTIMATE_LAG_BLOCKS) {
+    timeAvgSecs = diffSeconds / blocksInEpoch;
+    difficultyChange = (BLOCK_SECONDS_TARGET / timeAvgSecs - 1) * 100;
+    // Max increase is x4 (+300%)
+    if (difficultyChange > 300) {
+      difficultyChange = 300;
+    }
+    // Max decrease is /4 (-75%)
+    if (difficultyChange < -75) {
+      difficultyChange = -75;
+    }
+  }
+
+  // Testnet difficulty is set to 1 after 20 minutes of no blocks,
+  // therefore the time between blocks will always be below 20 minutes (1200s).
+  let timeOffset = 0;
+  if (network === 'testnet') {
+    if (timeAvgSecs > TESTNET_MAX_BLOCK_SECONDS) {
+      timeAvgSecs = TESTNET_MAX_BLOCK_SECONDS;
+    }
+
+    const secondsSinceLastBlock = nowSeconds - latestBlockTimestamp;
+    if (secondsSinceLastBlock + timeAvgSecs > TESTNET_MAX_BLOCK_SECONDS) {
+      timeOffset = -Math.min(secondsSinceLastBlock, TESTNET_MAX_BLOCK_SECONDS) * 1000;
+    }
+  }
+
+  const timeAvg = Math.floor(timeAvgSecs * 1000);
+  const remainingTime = remainingBlocks * timeAvg;
+  const estimatedRetargetDate = remainingTime + nowSeconds * 1000;
+
+  return {
+    progressPercent,
+    difficultyChange,
+    estimatedRetargetDate,
+    remainingBlocks,
+    remainingTime,
+    previousRetarget,
+    nextRetargetHeight,
+    timeAvg,
+    timeOffset,
+  };
+}
+
+class DifficultyAdjustmentApi {
+  public getDifficultyAdjustment(): IDifficultyAdjustment | null {
+    const DATime = blocks.getLastDifficultyAdjustmentTime();
+    const previousRetarget = blocks.getPreviousDifficultyRetarget();
+    const blockHeight = blocks.getCurrentBlockHeight();
+    const blocksCache = blocks.getBlocks();
+    const latestBlock = blocksCache[blocksCache.length - 1];
+    if (!latestBlock) {
+      return null;
+    }
+    const nowSeconds = Math.floor(new Date().getTime() / 1000);
+
+    return calcDifficultyAdjustment(
+      DATime, nowSeconds, blockHeight, previousRetarget,
+      config.MEMPOOL.NETWORK, latestBlock.timestamp
+    );
+  }
+}
+
+export default new DifficultyAdjustmentApi();

backend/src/api/disk-cache.ts

@@ -1,6 +1,6 @@
 import * as fs from 'fs';
 const fsPromises = fs.promises;
-import * as cluster from 'cluster';
+import cluster from 'cluster';
 import memPool from './mempool';
 import blocks from './blocks';
 import logger from '../logger';
@@ -9,6 +9,8 @@ import { TransactionExtended } from '../mempool.interfaces';
 import { Common } from './common';
 
 class DiskCache {
+  private cacheSchemaVersion = 1;
+
   private static FILE_NAME = config.MEMPOOL.CACHE_DIR + '/cache.json';
   private static FILE_NAMES = config.MEMPOOL.CACHE_DIR + '/cache{number}.json';
   private static CHUNK_FILES = 25;
@@ -17,7 +19,7 @@ class DiskCache {
   constructor() { }
 
   async $saveCacheToDisk(): Promise<void> {
-    if (!cluster.isMaster) {
+    if (!cluster.isPrimary) {
       return;
     }
     if (this.isWritingCache) {
@@ -39,15 +41,17 @@ class DiskCache {
       const chunkSize = Math.floor(mempoolArray.length / DiskCache.CHUNK_FILES);
 
       await fsPromises.writeFile(DiskCache.FILE_NAME, JSON.stringify({
+        cacheSchemaVersion: this.cacheSchemaVersion,
         blocks: blocks.getBlocks(),
+        blockSummaries: blocks.getBlockSummaries(),
         mempool: {},
         mempoolArray: mempoolArray.splice(0, chunkSize),
-      }), {flag: 'w'});
+      }), { flag: 'w' });
       for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
         await fsPromises.writeFile(DiskCache.FILE_NAMES.replace('{number}', i.toString()), JSON.stringify({
           mempool: {},
           mempoolArray: mempoolArray.splice(0, chunkSize),
-        }), {flag: 'w'});
+        }), { flag: 'w' });
       }
       logger.debug('Mempool and blocks data saved to disk cache');
       this.isWritingCache = false;
@@ -57,6 +61,13 @@ class DiskCache {
     }
   }
 
+  wipeCache() {
+    fs.unlinkSync(DiskCache.FILE_NAME);
+    for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
+      fs.unlinkSync(DiskCache.FILE_NAMES.replace('{number}', i.toString()));
+    }
+  }
+
   loadMempoolCache() {
     if (!fs.existsSync(DiskCache.FILE_NAME)) {
       return;
@@ -67,6 +78,11 @@ class DiskCache {
       if (cacheData) {
         logger.info('Restoring mempool and blocks data from disk cache');
         data = JSON.parse(cacheData);
+        if (data.cacheSchemaVersion === undefined || data.cacheSchemaVersion !== this.cacheSchemaVersion) {
+          logger.notice('Disk cache contains an outdated schema version. Clearing it and skipping the cache loading.');
+          return this.wipeCache();
+        }
+
         if (data.mempoolArray) {
           for (const tx of data.mempoolArray) {
             data.mempool[tx.txid] = tx;
@@ -88,14 +104,15 @@ class DiskCache {
             }
           }
         } catch (e) {
-          logger.debug('Error parsing ' + fileName + '. Skipping.');
+          logger.info('Error parsing ' + fileName + '. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
         }
       }
 
       memPool.setMempool(data.mempool);
       blocks.setBlocks(data.blocks);
+      blocks.setBlockSummaries(data.blockSummaries || []);
     } catch (e) {
-      logger.warn('Failed to parse mempoool and blocks cache. Skipping.');
+      logger.warn('Failed to parse mempoool and blocks cache. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
     }
   }
 }

backend/src/api/explorer/channels.api.ts

@@ -0,0 +1,700 @@
+import logger from '../../logger';
+import DB from '../../database';
+import nodesApi from './nodes.api';
+import { ResultSetHeader } from 'mysql2';
+import { ILightningApi } from '../lightning/lightning-api.interface';
+import { Common } from '../common';
+
+class ChannelsApi {
+  public async $getAllChannels(): Promise<any[]> {
+    try {
+      const query = `SELECT * FROM channels`;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getAllChannels error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getAllChannelsGeo(publicKey?: string, style?: string): Promise<any[]> {
+    try {
+      let select: string;
+      if (style === 'widget') {
+        select = `
+          nodes_1.latitude AS node1_latitude, nodes_1.longitude AS node1_longitude,
+          nodes_2.latitude AS node2_latitude, nodes_2.longitude AS node2_longitude
+        `;
+      } else {
+        select = `
+          nodes_1.public_key as node1_public_key, nodes_1.alias AS node1_alias,
+          nodes_1.latitude AS node1_latitude, nodes_1.longitude AS node1_longitude,
+          nodes_2.public_key as node2_public_key, nodes_2.alias AS node2_alias,
+          nodes_2.latitude AS node2_latitude, nodes_2.longitude AS node2_longitude
+        `;
+      }
+
+      const params: string[] = [];
+      let query = `SELECT ${select}
+        FROM channels
+        JOIN nodes AS nodes_1 on nodes_1.public_key = channels.node1_public_key
+        JOIN nodes AS nodes_2 on nodes_2.public_key = channels.node2_public_key
+        WHERE channels.status = 1
+          AND nodes_1.latitude IS NOT NULL AND nodes_1.longitude IS NOT NULL
+          AND nodes_2.latitude IS NOT NULL AND nodes_2.longitude IS NOT NULL
+      `;
+
+      if (publicKey !== undefined) {
+        query += ' AND (nodes_1.public_key = ? OR nodes_2.public_key = ?)';
+        params.push(publicKey);
+        params.push(publicKey);
+      } else {
+        query += ` AND channels.capacity > 1000000
+          GROUP BY nodes_1.public_key, nodes_2.public_key
+          ORDER BY channels.capacity DESC
+          LIMIT 10000
+        `;        
+      }
+
+      const [rows]: any = await DB.query(query, params);
+      return rows.map((row) => {
+        if (style === 'widget') {
+          return [
+            row.node1_longitude, row.node1_latitude,
+            row.node2_longitude, row.node2_latitude,
+          ];
+        } else {
+          return [
+            row.node1_public_key, row.node1_alias,
+            row.node1_longitude, row.node1_latitude,
+            row.node2_public_key, row.node2_alias,
+            row.node2_longitude, row.node2_latitude,
+          ];
+        }
+      });
+    } catch (e) {
+      logger.err('$getAllChannelsGeo error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $searchChannelsById(search: string): Promise<any[]> {
+    try {
+      const searchStripped = search.replace('%', '') + '%';
+      const query = `SELECT id, short_id, capacity, status FROM channels WHERE id LIKE ? OR short_id LIKE ? LIMIT 10`;
+      const [rows]: any = await DB.query(query, [searchStripped, searchStripped]);
+      return rows;
+    } catch (e) {
+      logger.err('$searchChannelsById error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannelsByStatus(status: number | number[]): Promise<any[]> {
+    try {
+      let query: string;
+      if (Array.isArray(status)) {
+        query = `SELECT * FROM channels WHERE status IN (${status.join(',')})`;
+      } else {
+        query = `SELECT * FROM channels WHERE status = ?`;
+      }
+      const [rows]: any = await DB.query(query, [status]);
+      return rows;
+    } catch (e) {
+      logger.err('$getChannelsByStatus error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getClosedChannelsWithoutReason(): Promise<any[]> {
+    try {
+      const query = `SELECT * FROM channels WHERE status = 2 AND closing_reason IS NULL AND closing_transaction_id != ''`;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getClosedChannelsWithoutReason error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getUnresolvedClosedChannels(): Promise<any[]> {
+    try {
+      const query = `SELECT * FROM channels WHERE status = 2 AND closing_reason = 2 AND closing_resolved = 0 AND closing_transaction_id != ''`;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getUnresolvedClosedChannels error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannelsWithoutSourceChecked(): Promise<any[]> {
+    try {
+      const query = `
+        SELECT channels.*
+        FROM channels
+        WHERE channels.source_checked != 1
+      `;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getUnresolvedClosedChannels error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannelsWithoutCreatedDate(): Promise<any[]> {
+    try {
+      const query = `SELECT * FROM channels WHERE created IS NULL`;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getChannelsWithoutCreatedDate error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannel(id: string): Promise<any> {
+    try {
+      const query = `
+        SELECT n1.alias AS alias_left, n1.longitude as node1_longitude, n1.latitude as node1_latitude,
+          n2.alias AS alias_right, n2.longitude as node2_longitude, n2.latitude as node2_latitude,
+          channels.*,
+          ns1.channels AS channels_left, ns1.capacity AS capacity_left, ns2.channels AS channels_right, ns2.capacity AS capacity_right
+        FROM channels
+        LEFT JOIN nodes AS n1 ON n1.public_key = channels.node1_public_key
+        LEFT JOIN nodes AS n2 ON n2.public_key = channels.node2_public_key
+        LEFT JOIN node_stats AS ns1 ON ns1.public_key = channels.node1_public_key
+        LEFT JOIN node_stats AS ns2 ON ns2.public_key = channels.node2_public_key
+        WHERE (
+          ns1.id = (
+            SELECT MAX(id)
+            FROM node_stats
+            WHERE public_key = channels.node1_public_key
+          )
+          AND ns2.id = (
+            SELECT MAX(id)
+            FROM node_stats
+            WHERE public_key = channels.node2_public_key
+          )
+        )
+        AND channels.id = ?
+      `;
+
+      const [rows]: any = await DB.query(query, [id]);
+      if (rows[0]) {
+        return this.convertChannel(rows[0]);
+      }
+    } catch (e) {
+      logger.err('$getChannel error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannelsStats(): Promise<any> {
+    try {
+      // Feedback from zerofeerouting:
+      // "I would argue > 5000ppm can be ignored. Channels charging more than .5% fee are ignored by CLN for example."
+      const ignoredFeeRateThreshold = 5000;
+      const ignoredBaseFeeThreshold = 5000;
+
+      // Capacity
+      let query = `SELECT AVG(capacity) AS avgCapacity FROM channels WHERE status = 1 ORDER BY capacity`;
+      const [avgCapacity]: any = await DB.query(query);
+
+      query = `SELECT capacity FROM channels WHERE status = 1 ORDER BY capacity`;
+      let [capacity]: any = await DB.query(query);
+      capacity = capacity.map(capacity => capacity.capacity);
+      const medianCapacity = capacity[Math.floor(capacity.length / 2)];
+
+      // Fee rates
+      query = `SELECT node1_fee_rate FROM channels WHERE node1_fee_rate < ${ignoredFeeRateThreshold} AND status = 1`;
+      let [feeRates1]: any = await DB.query(query);
+      feeRates1 = feeRates1.map(rate => rate.node1_fee_rate);
+      query = `SELECT node2_fee_rate FROM channels WHERE node2_fee_rate < ${ignoredFeeRateThreshold} AND status = 1`;
+      let [feeRates2]: any = await DB.query(query);
+      feeRates2 = feeRates2.map(rate => rate.node2_fee_rate);
+
+      let feeRates = (feeRates1.concat(feeRates2)).sort((a, b) => a - b);
+      let avgFeeRate = 0;
+      for (const rate of feeRates) {
+        avgFeeRate += rate; 
+      }
+      avgFeeRate /= feeRates.length;
+      const medianFeeRate = feeRates[Math.floor(feeRates.length / 2)];
+
+      // Base fees
+      query = `SELECT node1_base_fee_mtokens FROM channels WHERE node1_base_fee_mtokens < ${ignoredBaseFeeThreshold} AND status = 1`;
+      let [baseFees1]: any = await DB.query(query);
+      baseFees1 = baseFees1.map(rate => rate.node1_base_fee_mtokens);
+      query = `SELECT node2_base_fee_mtokens FROM channels WHERE node2_base_fee_mtokens < ${ignoredBaseFeeThreshold} AND status = 1`;
+      let [baseFees2]: any = await DB.query(query);
+      baseFees2 = baseFees2.map(rate => rate.node2_base_fee_mtokens);
+
+      let baseFees = (baseFees1.concat(baseFees2)).sort((a, b) => a - b);
+      let avgBaseFee = 0;
+      for (const fee of baseFees) {
+        avgBaseFee += fee; 
+      }
+      avgBaseFee /= baseFees.length;
+      const medianBaseFee = feeRates[Math.floor(baseFees.length / 2)];
+      
+      return {
+        avgCapacity: parseInt(avgCapacity[0].avgCapacity, 10),
+        avgFeeRate: avgFeeRate,
+        avgBaseFee: avgBaseFee,
+        medianCapacity: medianCapacity,
+        medianFeeRate: medianFeeRate,
+        medianBaseFee: medianBaseFee,
+      }
+
+    } catch (e) {
+      logger.err(`Cannot calculate channels statistics. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  public async $getChannelsByTransactionId(transactionIds: string[]): Promise<any[]> {
+    try {
+      const query = `
+        SELECT n1.alias AS alias_left, n2.alias AS alias_right, channels.*
+        FROM channels
+        LEFT JOIN nodes AS n1 ON n1.public_key = channels.node1_public_key
+        LEFT JOIN nodes AS n2 ON n2.public_key = channels.node2_public_key
+        WHERE channels.transaction_id IN ? OR channels.closing_transaction_id IN ?
+      `;
+      const [rows]: any = await DB.query(query, [[transactionIds], [transactionIds]]);
+      const channels = rows.map((row) => this.convertChannel(row));
+      return channels;
+    } catch (e) {
+      logger.err('$getChannelByTransactionId error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannelByClosingId(transactionId: string): Promise<any> {
+    try {
+      const query = `
+        SELECT
+          channels.*
+        FROM channels
+        WHERE channels.closing_transaction_id = ?
+      `;
+      const [rows]: any = await DB.query(query, [transactionId]);
+      if (rows.length > 0) {
+        rows[0].outputs = JSON.parse(rows[0].outputs);
+        return rows[0];
+      }
+    } catch (e) {
+      logger.err('$getChannelByClosingId error: ' + (e instanceof Error ? e.message : e));
+      // don't throw - this data isn't essential
+    }
+  }
+
+  public async $getChannelsByOpeningId(transactionId: string): Promise<any> {
+    try {
+      const query = `
+        SELECT
+          channels.*
+        FROM channels
+        WHERE channels.transaction_id = ?
+      `;
+      const [rows]: any = await DB.query(query, [transactionId]);
+      if (rows.length > 0) {
+        return rows.map(row => {
+          row.outputs = JSON.parse(row.outputs);
+          return row;
+        });
+      }
+    } catch (e) {
+      logger.err('$getChannelsByOpeningId error: ' + (e instanceof Error ? e.message : e));
+      // don't throw - this data isn't essential
+    }
+  }
+
+  public async $updateClosingInfo(channelInfo: { id: string, node1_closing_balance: number, node2_closing_balance: number, closed_by: string | null, closing_fee: number, outputs: ILightningApi.ForensicOutput[]}): Promise<void> {
+    try {
+      const query = `
+        UPDATE channels SET
+          node1_closing_balance = ?,
+          node2_closing_balance = ?,
+          closed_by = ?,
+          closing_fee = ?,
+          outputs = ?
+        WHERE channels.id = ?
+      `;
+      await DB.query<ResultSetHeader>(query, [
+        channelInfo.node1_closing_balance || 0,
+        channelInfo.node2_closing_balance || 0,
+        channelInfo.closed_by,
+        channelInfo.closing_fee || 0,
+        JSON.stringify(channelInfo.outputs),
+        channelInfo.id,
+      ]);
+    } catch (e) {
+      logger.err('$updateClosingInfo error: ' + (e instanceof Error ? e.message : e));
+      // don't throw - this data isn't essential
+    }
+  }
+
+  public async $updateOpeningInfo(channelInfo: { id: string, node1_funding_balance: number, node2_funding_balance: number, funding_ratio: number, single_funded: boolean | void }): Promise<void> {
+    try {
+      const query = `
+        UPDATE channels SET
+          node1_funding_balance = ?,
+          node2_funding_balance = ?,
+          funding_ratio = ?,
+          single_funded = ?
+        WHERE channels.id = ?
+      `;
+      await DB.query<ResultSetHeader>(query, [
+        channelInfo.node1_funding_balance || 0,
+        channelInfo.node2_funding_balance || 0,
+        channelInfo.funding_ratio,
+        channelInfo.single_funded ? 1 : 0,
+        channelInfo.id,
+      ]);
+    } catch (e) {
+      logger.err('$updateOpeningInfo error: ' + (e instanceof Error ? e.message : e));
+      // don't throw - this data isn't essential
+    }
+  }
+
+  public async $markChannelSourceChecked(id: string): Promise<void> {
+    try {
+      const query = `
+        UPDATE channels
+        SET source_checked = 1
+        WHERE id = ?
+      `;
+      await DB.query<ResultSetHeader>(query, [id]);
+    } catch (e) {
+      logger.err('$markChannelSourceChecked error: ' + (e instanceof Error ? e.message : e));
+      // don't throw - this data isn't essential
+    }
+  }
+
+  public async $getChannelsForNode(public_key: string, index: number, length: number, status: string): Promise<any[]> {
+    try {
+      let channelStatusFilter;
+      if (status === 'open') {
+        channelStatusFilter = '< 2';
+      } else if (status === 'active') {
+        channelStatusFilter = '= 1';
+      } else if (status === 'closed') {
+        channelStatusFilter = '= 2';
+      } else {
+        throw new Error('getChannelsForNode: Invalid status requested');
+      }
+
+      // Channels originating from node
+      let query = `
+        SELECT COALESCE(node2.alias, SUBSTRING(node2_public_key, 0, 20)) AS alias, COALESCE(node2.public_key, node2_public_key) AS public_key,
+          channels.status, channels.node1_fee_rate,
+          channels.capacity, channels.short_id, channels.id, channels.closing_reason,
+          UNIX_TIMESTAMP(closing_date) as closing_date, UNIX_TIMESTAMP(channels.updated_at) as updated_at
+        FROM channels
+        LEFT JOIN nodes AS node2 ON node2.public_key = channels.node2_public_key
+        WHERE node1_public_key = ? AND channels.status ${channelStatusFilter}
+      `;
+      const [channelsFromNode]: any = await DB.query(query, [public_key]);
+
+      // Channels incoming to node
+      query = `
+        SELECT COALESCE(node1.alias, SUBSTRING(node1_public_key, 0, 20)) AS alias, COALESCE(node1.public_key, node1_public_key) AS public_key,
+          channels.status, channels.node2_fee_rate,
+          channels.capacity, channels.short_id, channels.id, channels.closing_reason,
+          UNIX_TIMESTAMP(closing_date) as closing_date, UNIX_TIMESTAMP(channels.updated_at) as updated_at
+        FROM channels
+        LEFT JOIN nodes AS node1 ON node1.public_key = channels.node1_public_key
+        WHERE node2_public_key = ? AND channels.status ${channelStatusFilter}
+      `;
+      const [channelsToNode]: any = await DB.query(query, [public_key]);
+
+      let allChannels = channelsFromNode.concat(channelsToNode);
+      allChannels.sort((a, b) => {
+        if (status === 'closed') {
+          if (!b.closing_date && !a.closing_date) {
+            return (b.updated_at ?? 0) - (a.updated_at ?? 0);
+          } else {
+            return (b.closing_date ?? 0) - (a.closing_date ?? 0);
+          }
+        } else {
+          return b.capacity - a.capacity;
+        }
+      });
+
+      if (index >= 0) {
+        allChannels = allChannels.slice(index, index + length);
+      } else if (index === -1) { // Node channels tree chart
+        allChannels = allChannels.slice(0, 1000);
+      }
+
+      const channels: any[] = []
+      for (const row of allChannels) {
+        let channel;
+        if (index >= 0) {
+          const activeChannelsStats: any = await nodesApi.$getActiveChannelsStats(row.public_key);
+          channel = {
+            status: row.status,
+            closing_reason: row.closing_reason,
+            closing_date: row.closing_date,
+            capacity: row.capacity ?? 0,
+            short_id: row.short_id,
+            id: row.id,
+            fee_rate: row.node1_fee_rate ?? row.node2_fee_rate ?? 0,
+            node: {
+              alias: row.alias.length > 0 ? row.alias : row.public_key.slice(0, 20),
+              public_key: row.public_key,
+              channels: activeChannelsStats.active_channel_count ?? 0,
+              capacity: activeChannelsStats.capacity ?? 0,
+            }
+          };
+        } else if (index === -1) {
+          channel = {
+            capacity: row.capacity ?? 0,
+            short_id: row.short_id,
+            id: row.id,
+            node: {
+              alias: row.alias.length > 0 ? row.alias : row.public_key.slice(0, 20),
+              public_key: row.public_key,
+            }
+          };
+        }
+
+        channels.push(channel);
+      }
+
+      return channels;
+    } catch (e) {
+      logger.err('$getChannelsForNode error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getChannelsCountForNode(public_key: string, status: string): Promise<any> {
+    try {
+      // Default active and inactive channels
+      let statusQuery = '< 2';
+      // Closed channels only
+      if (status === 'closed') {
+        statusQuery = '= 2';
+      }
+      const query = `
+        SELECT COUNT(*) AS count
+        FROM channels
+        WHERE (node1_public_key = ? OR node2_public_key = ?)
+        AND status ${statusQuery}
+      `;
+      const [rows]: any = await DB.query(query, [public_key, public_key]);
+      return rows[0]['count'];
+    } catch (e) {
+      logger.err('$getChannelsForNode error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  private convertChannel(channel: any): any {
+    return {
+      'id': channel.id,
+      'short_id': channel.short_id,
+      'capacity': channel.capacity,
+      'transaction_id': channel.transaction_id,
+      'transaction_vout': channel.transaction_vout,
+      'closing_transaction_id': channel.closing_transaction_id,
+      'closing_fee': channel.closing_fee,
+      'closing_reason': channel.closing_reason,
+      'closing_date': channel.closing_date,
+      'updated_at': channel.updated_at,
+      'created': channel.created,
+      'status': channel.status,
+      'funding_ratio': channel.funding_ratio,
+      'closed_by': channel.closed_by,
+      'single_funded': !!channel.single_funded,
+      'node_left': {
+        'alias': channel.alias_left,
+        'public_key': channel.node1_public_key,
+        'channels': channel.channels_left,
+        'capacity': channel.capacity_left,
+        'base_fee_mtokens': channel.node1_base_fee_mtokens,
+        'cltv_delta': channel.node1_cltv_delta,
+        'fee_rate': channel.node1_fee_rate,
+        'is_disabled': channel.node1_is_disabled,
+        'max_htlc_mtokens': channel.node1_max_htlc_mtokens,
+        'min_htlc_mtokens': channel.node1_min_htlc_mtokens,
+        'updated_at': channel.node1_updated_at,
+        'longitude': channel.node1_longitude,
+        'latitude': channel.node1_latitude,
+        'funding_balance': channel.node1_funding_balance,
+        'closing_balance': channel.node1_closing_balance,
+        'initiated_close': channel.closed_by === channel.node1_public_key ? true : undefined,
+      },
+      'node_right': {
+        'alias': channel.alias_right,
+        'public_key': channel.node2_public_key,
+        'channels': channel.channels_right,
+        'capacity': channel.capacity_right,
+        'base_fee_mtokens': channel.node2_base_fee_mtokens,
+        'cltv_delta': channel.node2_cltv_delta,
+        'fee_rate': channel.node2_fee_rate,
+        'is_disabled': channel.node2_is_disabled,
+        'max_htlc_mtokens': channel.node2_max_htlc_mtokens,
+        'min_htlc_mtokens': channel.node2_min_htlc_mtokens,
+        'updated_at': channel.node2_updated_at,
+        'longitude': channel.node2_longitude,
+        'latitude': channel.node2_latitude,
+        'funding_balance': channel.node2_funding_balance,
+        'closing_balance': channel.node2_closing_balance,
+        'initiated_close': channel.closed_by === channel.node2_public_key ? true : undefined,
+      },
+    };
+  }
+
+  /**
+   * Save or update a channel present in the graph
+   */
+  public async $saveChannel(channel: ILightningApi.Channel, status = 1): Promise<void> {
+    const [ txid, vout ] = channel.chan_point.split(':');
+
+    const policy1: Partial<ILightningApi.RoutingPolicy> = channel.node1_policy || {};
+    const policy2: Partial<ILightningApi.RoutingPolicy> = channel.node2_policy || {};
+
+    const query = `INSERT INTO channels
+      (
+        id,
+        short_id,
+        capacity,
+        transaction_id,
+        transaction_vout,
+        updated_at,
+        status,
+        node1_public_key,
+        node1_base_fee_mtokens,
+        node1_cltv_delta,
+        node1_fee_rate,
+        node1_is_disabled,
+        node1_max_htlc_mtokens,
+        node1_min_htlc_mtokens,
+        node1_updated_at,
+        node2_public_key,
+        node2_base_fee_mtokens,
+        node2_cltv_delta,
+        node2_fee_rate,
+        node2_is_disabled,
+        node2_max_htlc_mtokens,
+        node2_min_htlc_mtokens,
+        node2_updated_at
+      )
+      VALUES (?, ?, ?, ?, ?, ?, ${status}, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+      ON DUPLICATE KEY UPDATE
+        capacity = ?,
+        updated_at = ?,
+        status = ${status},
+        node1_public_key = ?,
+        node1_base_fee_mtokens = ?,
+        node1_cltv_delta = ?,
+        node1_fee_rate = ?,
+        node1_is_disabled = ?,
+        node1_max_htlc_mtokens = ?,
+        node1_min_htlc_mtokens = ?,
+        node1_updated_at = ?,
+        node2_public_key = ?,
+        node2_base_fee_mtokens = ?,
+        node2_cltv_delta = ?,
+        node2_fee_rate = ?,
+        node2_is_disabled = ?,
+        node2_max_htlc_mtokens = ?,
+        node2_min_htlc_mtokens = ?,
+        node2_updated_at = ?
+      ;`;
+
+    await DB.query(query, [
+      Common.channelShortIdToIntegerId(channel.channel_id),
+      Common.channelIntegerIdToShortId(channel.channel_id),
+      channel.capacity,
+      txid,
+      vout,
+      Common.utcDateToMysql(channel.last_update),
+      channel.node1_pub,
+      policy1.fee_base_msat,
+      policy1.time_lock_delta,
+      policy1.fee_rate_milli_msat,
+      policy1.disabled,
+      policy1.max_htlc_msat,
+      policy1.min_htlc,
+      Common.utcDateToMysql(policy1.last_update),
+      channel.node2_pub,
+      policy2.fee_base_msat,
+      policy2.time_lock_delta,
+      policy2.fee_rate_milli_msat,
+      policy2.disabled,
+      policy2.max_htlc_msat,
+      policy2.min_htlc,
+      Common.utcDateToMysql(policy2.last_update),
+      channel.capacity,
+      Common.utcDateToMysql(channel.last_update),
+      channel.node1_pub,
+      policy1.fee_base_msat,
+      policy1.time_lock_delta,
+      policy1.fee_rate_milli_msat,
+      policy1.disabled,
+      policy1.max_htlc_msat,
+      policy1.min_htlc,
+      Common.utcDateToMysql(policy1.last_update),
+      channel.node2_pub,
+      policy2.fee_base_msat,
+      policy2.time_lock_delta,
+      policy2.fee_rate_milli_msat,
+      policy2.disabled,
+      policy2.max_htlc_msat,
+      policy2.min_htlc,
+      Common.utcDateToMysql(policy2.last_update)
+    ]);
+  }
+
+  /**
+   * Set all channels not in `graphChannelsIds` as inactive (status = 0)
+   */
+  public async $setChannelsInactive(graphChannelsIds: string[]): Promise<void> {
+    if (graphChannelsIds.length === 0) {
+      return;
+    }
+
+    try {
+      const result = await DB.query<ResultSetHeader>(`
+        UPDATE channels
+        SET status = 0
+        WHERE id NOT IN (
+          ${graphChannelsIds.map(id => `"${id}"`).join(',')}
+        )
+        AND status != 2
+      `);
+      if (result[0].changedRows ?? 0 > 0) {
+        logger.info(`Marked ${result[0].changedRows} channels as inactive because they are not in the graph`);
+      } else {
+        logger.debug(`Marked ${result[0].changedRows} channels as inactive because they are not in the graph`);
+      }
+    } catch (e) {
+      logger.err('$setChannelsInactive() error: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  public async $getLatestChannelUpdateForNode(publicKey: string): Promise<number> {
+    try {
+      const query = `
+        SELECT MAX(UNIX_TIMESTAMP(updated_at)) as updated_at
+        FROM channels
+        WHERE node1_public_key = ?
+      `;
+      const [rows]: any[] = await DB.query(query, [publicKey]);
+      if (rows.length > 0) {
+        return rows[0].updated_at;
+      }
+    } catch (e) {
+      logger.err(`Can't getLatestChannelUpdateForNode for ${publicKey}. Reason ${e instanceof Error ? e.message : e}`);
+    }
+    return 0;
+  }
+}
+
+export default new ChannelsApi();

backend/src/api/explorer/channels.routes.ts

@@ -0,0 +1,126 @@
+import config from '../../config';
+import { Application, Request, Response } from 'express';
+import channelsApi from './channels.api';
+
+class ChannelsRoutes {
+  constructor() { }
+
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels/txids', this.$getChannelsByTransactionIds)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels/search/:search', this.$searchChannelsById)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels/:short_id', this.$getChannel)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels', this.$getChannelsForNode)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels-geo', this.$getAllChannelsGeo)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels-geo/:publicKey', this.$getAllChannelsGeo)
+    ;
+  }
+
+  private async $searchChannelsById(req: Request, res: Response) {
+    try {
+      const channels = await channelsApi.$searchChannelsById(req.params.search);
+      res.json(channels);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getChannel(req: Request, res: Response) {
+    try {
+      const channel = await channelsApi.$getChannel(req.params.short_id);
+      if (!channel) {
+        res.status(404).send('Channel not found');
+        return;
+      }
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(channel);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getChannelsForNode(req: Request, res: Response) {
+    try {
+      if (typeof req.query.public_key !== 'string') {
+        res.status(400).send('Missing parameter: public_key');
+        return;
+      }
+
+      const index = parseInt(typeof req.query.index === 'string' ? req.query.index : '0', 10) || 0;
+      const status: string = typeof req.query.status === 'string' ? req.query.status : '';
+
+      if (index < -1) {
+        res.status(400).send('Invalid index');
+      }
+      if (['open', 'active', 'closed'].includes(status) === false) {
+        res.status(400).send('Invalid status');
+      }
+
+      const channels = await channelsApi.$getChannelsForNode(req.query.public_key, index, 10, status);
+      const channelsCount = await channelsApi.$getChannelsCountForNode(req.query.public_key, status);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.header('X-Total-Count', channelsCount.toString());
+      res.json(channels);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getChannelsByTransactionIds(req: Request, res: Response): Promise<void> {
+    try {
+      if (!Array.isArray(req.query.txId)) {
+        res.status(400).send('Not an array');
+        return;
+      }
+      const txIds: string[] = [];
+      for (const _txId in req.query.txId) {
+        if (typeof req.query.txId[_txId] === 'string') {
+          txIds.push(req.query.txId[_txId].toString());
+        }
+      }
+      const channels = await channelsApi.$getChannelsByTransactionId(txIds);
+      const result: any[] = [];
+      for (const txid of txIds) {
+        const inputs: any = {};
+        const outputs: any = {};
+        // Assuming that we only have one lightning close input in each transaction. This may not be true in the future
+        const foundChannelsFromInput = channels.find((channel) => channel.closing_transaction_id === txid);
+        if (foundChannelsFromInput) {
+          inputs[0] = foundChannelsFromInput;
+        }
+        const foundChannelsFromOutputs = channels.filter((channel) => channel.transaction_id === txid);
+        for (const output of foundChannelsFromOutputs) {
+          outputs[output.transaction_vout] = output;
+        }
+        result.push({
+          inputs,
+          outputs,
+        });
+      }
+
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getAllChannelsGeo(req: Request, res: Response) {
+    try {
+      const style: string = typeof req.query.style === 'string' ? req.query.style : '';
+      const channels = await channelsApi.$getAllChannelsGeo(req.params?.publicKey, style);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(channels);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+}
+
+export default new ChannelsRoutes();

backend/src/api/explorer/general.routes.ts

@@ -0,0 +1,58 @@
+import config from '../../config';
+import { Application, Request, Response } from 'express';
+import nodesApi from './nodes.api';
+import channelsApi from './channels.api';
+import statisticsApi from './statistics.api';
+class GeneralLightningRoutes {
+  constructor() { }
+
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/search', this.$searchNodesAndChannels)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/statistics/latest', this.$getGeneralStats)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/statistics/:interval', this.$getStatistics)
+    ;
+  }
+
+  private async $searchNodesAndChannels(req: Request, res: Response) {
+    if (typeof req.query.searchText !== 'string') {
+      res.status(400).send('Missing parameter: searchText');
+      return;
+    }
+    try {
+      const nodes = await nodesApi.$searchNodeByPublicKeyOrAlias(req.query.searchText);
+      const channels = await channelsApi.$searchChannelsById(req.query.searchText);
+      res.json({
+        nodes: nodes,
+        channels: channels,
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getStatistics(req: Request, res: Response) {
+    try {
+      const statistics = await statisticsApi.$getStatistics(req.params.interval);
+      const statisticsCount = await statisticsApi.$getStatisticsCount();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', statisticsCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(statistics);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getGeneralStats(req: Request, res: Response) {
+    try {
+      const statistics = await statisticsApi.$getLatestStatistics();
+      res.json(statistics);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+}
+
+export default new GeneralLightningRoutes();

backend/src/api/explorer/nodes.api.ts

@@ -0,0 +1,702 @@
+import logger from '../../logger';
+import DB from '../../database';
+import { ResultSetHeader } from 'mysql2';
+import { ILightningApi } from '../lightning/lightning-api.interface';
+import { ITopNodesPerCapacity, ITopNodesPerChannels } from '../../mempool.interfaces';
+
+class NodesApi {
+  public async $getWorldNodes(): Promise<any> {
+    try {
+      let query = `
+        SELECT nodes.public_key as publicKey, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+        CAST(COALESCE(nodes.capacity, 0) as INT) as capacity,
+        CAST(COALESCE(nodes.channels, 0) as INT) as channels,
+        nodes.longitude, nodes.latitude,
+        geo_names_country.names as country, geo_names_iso.names as isoCode
+        FROM nodes
+        JOIN geo_names geo_names_country ON geo_names_country.id = nodes.country_id AND geo_names_country.type = 'country'
+        JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+        WHERE status = 1 AND nodes.as_number IS NOT NULL
+        ORDER BY capacity
+      `;
+
+      const [nodes]: any[] = await DB.query(query);
+
+      for (let i = 0; i < nodes.length; ++i) {
+        nodes[i].country = JSON.parse(nodes[i].country);
+      }
+
+      query = `
+        SELECT MAX(nodes.capacity) as maxLiquidity, MAX(nodes.channels) as maxChannels
+        FROM nodes
+        WHERE status = 1 AND nodes.as_number IS NOT NULL
+      `;
+
+      const [maximums]: any[] = await DB.query(query);
+      
+      return {
+        maxLiquidity: maximums[0].maxLiquidity,
+        maxChannels: maximums[0].maxChannels,
+        nodes: nodes.map(node => [
+          node.longitude, node.latitude,
+          node.publicKey, node.alias, node.capacity, node.channels,
+          node.country, node.isoCode
+        ])
+      };
+    } catch (e) {
+      logger.err(`Can't get world nodes list. Reason: ${e instanceof Error ? e.message : e}`);
+    }
+  }
+
+  public async $getNode(public_key: string): Promise<any> {
+    try {
+      // General info
+      let query = `
+        SELECT public_key, alias, UNIX_TIMESTAMP(first_seen) AS first_seen,
+          UNIX_TIMESTAMP(updated_at) AS updated_at, color, sockets as sockets,
+          as_number, city_id, country_id, subdivision_id, longitude, latitude,
+          geo_names_iso.names as iso_code, geo_names_as.names as as_organization, geo_names_city.names as city,
+          geo_names_country.names as country, geo_names_subdivision.names as subdivision
+        FROM nodes
+        LEFT JOIN geo_names geo_names_as on geo_names_as.id = as_number
+        LEFT JOIN geo_names geo_names_city on geo_names_city.id = city_id
+        LEFT JOIN geo_names geo_names_subdivision on geo_names_subdivision.id = subdivision_id
+        LEFT JOIN geo_names geo_names_country on geo_names_country.id = country_id
+        LEFT JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+        WHERE public_key = ?
+      `;
+      let [rows]: any[] = await DB.query(query, [public_key]);
+      if (rows.length === 0) {
+        throw new Error(`This node does not exist, or our node is not seeing it yet`);
+      }
+
+      const node = rows[0];
+      node.as_organization = JSON.parse(node.as_organization);
+      node.subdivision = JSON.parse(node.subdivision);
+      node.city = JSON.parse(node.city);
+      node.country = JSON.parse(node.country);
+
+      // Active channels and capacity
+      const activeChannelsStats: any = await this.$getActiveChannelsStats(public_key);
+      node.active_channel_count = activeChannelsStats.active_channel_count ?? 0;
+      node.capacity = activeChannelsStats.capacity ?? 0;
+
+      // Opened channels count
+      query = `
+        SELECT count(short_id) as opened_channel_count
+        FROM channels
+        WHERE status != 2 AND (channels.node1_public_key = ? OR channels.node2_public_key = ?)
+      `;
+      [rows] = await DB.query(query, [public_key, public_key]);
+      node.opened_channel_count = 0;
+      if (rows.length > 0) {
+        node.opened_channel_count = rows[0].opened_channel_count;
+      }
+
+      // Closed channels count
+      query = `
+        SELECT count(short_id) as closed_channel_count
+        FROM channels
+        WHERE status = 2 AND (channels.node1_public_key = ? OR channels.node2_public_key = ?)
+      `;
+      [rows] = await DB.query(query, [public_key, public_key]);
+      node.closed_channel_count = 0;
+      if (rows.length > 0) {
+        node.closed_channel_count = rows[0].closed_channel_count;
+      }
+
+      // Custom records
+      query = `
+        SELECT type, payload
+        FROM nodes_records
+        WHERE public_key = ?
+      `;
+      [rows] = await DB.query(query, [public_key]);
+      node.custom_records = {};
+      for (const record of rows) {
+        node.custom_records[record.type] = Buffer.from(record.payload, 'binary').toString('hex');
+      }
+
+      return node;
+    } catch (e) {
+      logger.err(`Cannot get node information for ${public_key}. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
+  public async $getActiveChannelsStats(node_public_key: string): Promise<unknown> {
+    const query = `
+      SELECT count(short_id) as active_channel_count, sum(capacity) as capacity
+      FROM channels
+      WHERE status = 1 AND (channels.node1_public_key = ? OR channels.node2_public_key = ?)
+    `;
+    const [rows]: any[] = await DB.query(query, [node_public_key, node_public_key]);
+    if (rows.length > 0) {
+      return {
+        active_channel_count: rows[0].active_channel_count,
+        capacity: rows[0].capacity
+      };
+    } else {
+      return null;
+    }
+  }
+
+  public async $getFeeHistogram(node_public_key: string): Promise<unknown> {
+    try {
+      const inQuery = `
+        SELECT CASE WHEN fee_rate <= 10.0 THEN CEIL(fee_rate)
+                    WHEN (fee_rate > 10.0 and fee_rate <= 100.0) THEN CEIL(fee_rate / 10.0) * 10.0
+                    WHEN (fee_rate > 100.0 and fee_rate <= 1000.0) THEN CEIL(fee_rate / 100.0) * 100.0
+                    WHEN fee_rate > 1000.0 THEN CEIL(fee_rate / 1000.0) * 1000.0
+               END as bucket,
+               count(short_id) as count,
+               sum(capacity) as capacity
+        FROM (
+          SELECT CASE WHEN node1_public_key = ? THEN node2_fee_rate WHEN node2_public_key = ? THEN node1_fee_rate END as fee_rate,
+                 short_id as short_id,
+                 capacity as capacity
+          FROM channels
+          WHERE status = 1 AND (channels.node1_public_key = ? OR channels.node2_public_key = ?)
+        ) as fee_rate_table
+        GROUP BY bucket;
+      `;
+      const [inRows]: any[] = await DB.query(inQuery, [node_public_key, node_public_key, node_public_key, node_public_key]);
+
+      const outQuery = `
+        SELECT CASE WHEN fee_rate <= 10.0 THEN CEIL(fee_rate)
+                    WHEN (fee_rate > 10.0 and fee_rate <= 100.0) THEN CEIL(fee_rate / 10.0) * 10.0
+                    WHEN (fee_rate > 100.0 and fee_rate <= 1000.0) THEN CEIL(fee_rate / 100.0) * 100.0
+                    WHEN fee_rate > 1000.0 THEN CEIL(fee_rate / 1000.0) * 1000.0
+               END as bucket,
+               count(short_id) as count,
+               sum(capacity) as capacity
+        FROM (
+          SELECT CASE WHEN node1_public_key = ? THEN node1_fee_rate WHEN node2_public_key = ? THEN node2_fee_rate END as fee_rate,
+                 short_id as short_id,
+                 capacity as capacity
+          FROM channels
+          WHERE status = 1 AND (channels.node1_public_key = ? OR channels.node2_public_key = ?)
+        ) as fee_rate_table
+        GROUP BY bucket;
+      `;
+      const [outRows]: any[] = await DB.query(outQuery, [node_public_key, node_public_key, node_public_key, node_public_key]);
+
+      return {
+        incoming: inRows.length > 0 ? inRows : [],
+        outgoing: outRows.length > 0 ? outRows : [],
+      };
+    } catch (e) {
+      logger.err(`Cannot get node fee distribution for ${node_public_key}. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
+  public async $getAllNodes(): Promise<any> {
+    try {
+      const query = `SELECT * FROM nodes`;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getAllNodes error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getNodeStats(public_key: string): Promise<any> {
+    try {
+      const query = `
+        SELECT UNIX_TIMESTAMP(added) AS added, capacity, channels
+        FROM node_stats
+        WHERE public_key = ?
+        ORDER BY added DESC
+      `;
+      const [rows]: any = await DB.query(query, [public_key]);
+      return rows;
+    } catch (e) {
+      logger.err('$getNodeStats error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getTopCapacityNodes(full: boolean): Promise<ITopNodesPerCapacity[]> {
+    try {
+      let rows: any;
+      let query: string;
+      if (full === false) {
+        query = `
+          SELECT nodes.public_key AS publicKey, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+            nodes.capacity
+          FROM nodes
+          ORDER BY capacity DESC
+          LIMIT 100
+        `;
+
+        [rows] = await DB.query(query);
+      } else {
+        query = `
+          SELECT nodes.public_key AS publicKey, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+            CAST(COALESCE(nodes.capacity, 0) as INT) as capacity,
+            CAST(COALESCE(nodes.channels, 0) as INT) as channels,
+            UNIX_TIMESTAMP(nodes.first_seen) as firstSeen, UNIX_TIMESTAMP(nodes.updated_at) as updatedAt,
+            geo_names_city.names as city, geo_names_country.names as country,
+            geo_names_iso.names as iso_code, geo_names_subdivision.names as subdivision
+          FROM nodes
+          LEFT JOIN geo_names geo_names_country ON geo_names_country.id = nodes.country_id AND geo_names_country.type = 'country'
+          LEFT JOIN geo_names geo_names_city ON geo_names_city.id = nodes.city_id AND geo_names_city.type = 'city'
+          LEFT JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+          LEFT JOIN geo_names geo_names_subdivision on geo_names_subdivision.id = nodes.subdivision_id AND geo_names_subdivision.type = 'division'
+          ORDER BY capacity DESC
+          LIMIT 100
+        `;
+
+        [rows] = await DB.query(query);
+        for (let i = 0; i < rows.length; ++i) {
+          rows[i].country = JSON.parse(rows[i].country);
+          rows[i].city = JSON.parse(rows[i].city);
+        }
+      }
+
+      return rows;
+    } catch (e) {
+      logger.err('$getTopCapacityNodes error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getTopChannelsNodes(full: boolean): Promise<ITopNodesPerChannels[]> {
+    try {
+      let rows: any;
+      let query: string;
+      if (full === false) {
+        query = `
+          SELECT nodes.public_key as publicKey, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+            nodes.channels
+          FROM nodes
+          ORDER BY channels DESC
+          LIMIT 100;
+        `;
+
+        [rows] = await DB.query(query);
+      } else {
+        query = `
+          SELECT nodes.public_key AS publicKey, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+            CAST(COALESCE(nodes.channels, 0) as INT) as channels,
+            CAST(COALESCE(nodes.capacity, 0) as INT) as capacity,
+            UNIX_TIMESTAMP(nodes.first_seen) as firstSeen, UNIX_TIMESTAMP(nodes.updated_at) as updatedAt,
+            geo_names_city.names as city, geo_names_country.names as country,
+            geo_names_iso.names as iso_code, geo_names_subdivision.names as subdivision
+          FROM nodes
+          LEFT JOIN geo_names geo_names_country ON geo_names_country.id = nodes.country_id AND geo_names_country.type = 'country'
+          LEFT JOIN geo_names geo_names_city ON geo_names_city.id = nodes.city_id AND geo_names_city.type = 'city'
+          LEFT JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+          LEFT JOIN geo_names geo_names_subdivision on geo_names_subdivision.id = nodes.subdivision_id AND geo_names_subdivision.type = 'division'
+          ORDER BY channels DESC
+          LIMIT 100
+        `;
+
+        [rows] = await DB.query(query);
+        for (let i = 0; i < rows.length; ++i) {
+          rows[i].country = JSON.parse(rows[i].country);
+          rows[i].city = JSON.parse(rows[i].city);
+        }
+      }
+
+      return rows;
+    } catch (e) {
+      logger.err('$getTopChannelsNodes error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getOldestNodes(full: boolean): Promise<ITopNodesPerChannels[]> {
+    try {
+      let [rows]: any[] = await DB.query('SELECT UNIX_TIMESTAMP(MAX(added)) as maxAdded FROM node_stats');
+      const latestDate = rows[0].maxAdded;
+
+      let query: string;
+      if (full === false) {
+        query = `
+          SELECT nodes.public_key, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+            node_stats.channels
+          FROM node_stats
+          JOIN nodes ON nodes.public_key = node_stats.public_key
+          WHERE added = FROM_UNIXTIME(${latestDate})
+          ORDER BY first_seen
+          LIMIT 100;
+        `;
+
+        [rows] = await DB.query(query);
+      } else {
+        query = `
+          SELECT node_stats.public_key AS publicKey, IF(nodes.alias = '', SUBSTRING(node_stats.public_key, 1, 20), alias) as alias,
+            CAST(COALESCE(node_stats.channels, 0) as INT) as channels,
+            CAST(COALESCE(node_stats.capacity, 0) as INT) as capacity,
+            UNIX_TIMESTAMP(nodes.first_seen) as firstSeen, UNIX_TIMESTAMP(nodes.updated_at) as updatedAt,
+            geo_names_city.names as city, geo_names_country.names as country,
+            geo_names_iso.names as iso_code, geo_names_subdivision.names as subdivision
+          FROM node_stats
+          RIGHT JOIN nodes ON nodes.public_key = node_stats.public_key
+          LEFT JOIN geo_names geo_names_country ON geo_names_country.id = nodes.country_id AND geo_names_country.type = 'country'
+          LEFT JOIN geo_names geo_names_city ON geo_names_city.id = nodes.city_id AND geo_names_city.type = 'city'
+          LEFT JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+          LEFT JOIN geo_names geo_names_subdivision on geo_names_subdivision.id = nodes.subdivision_id AND geo_names_subdivision.type = 'division'
+          WHERE added = FROM_UNIXTIME(${latestDate})
+          ORDER BY first_seen
+          LIMIT 100
+        `;
+
+        [rows] = await DB.query(query);
+        for (let i = 0; i < rows.length; ++i) {
+          rows[i].country = JSON.parse(rows[i].country);
+          rows[i].city = JSON.parse(rows[i].city);
+        }
+      }
+
+      return rows;
+    } catch (e) {
+      logger.err('$getTopChannelsNodes error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $searchNodeByPublicKeyOrAlias(search: string) {
+    try {
+      const publicKeySearch = search.replace('%', '') + '%';
+      const aliasSearch = search.replace(/[-_.]/g, ' ').replace(/[^a-zA-Z0-9 ]/g, '').split(' ').map((search) => '+' + search + '*').join(' ');
+      const query = `SELECT public_key, alias, capacity, channels, status FROM nodes WHERE public_key LIKE ? OR MATCH alias_search AGAINST (? IN BOOLEAN MODE) ORDER BY capacity DESC LIMIT 10`;
+      const [rows]: any = await DB.query(query, [publicKeySearch, aliasSearch]);
+      return rows;
+    } catch (e) {
+      logger.err('$searchNodeByPublicKeyOrAlias error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getNodesISPRanking() {
+    try {
+      let query = '';
+
+      // List all channels and the two linked ISP
+      query = `
+        SELECT short_id, channels.capacity,
+          channels.node1_public_key AS node1PublicKey, isp1.names AS isp1, isp1.id as isp1ID,
+          channels.node2_public_key AS node2PublicKey, isp2.names AS isp2, isp2.id as isp2ID
+        FROM channels
+        JOIN nodes node1 ON node1.public_key = channels.node1_public_key
+        JOIN nodes node2 ON node2.public_key = channels.node2_public_key
+        JOIN geo_names isp1 ON isp1.id = node1.as_number
+        JOIN geo_names isp2 ON isp2.id = node2.as_number
+        WHERE channels.status = 1
+        ORDER BY short_id DESC
+      `;
+      const [channelsIsp]: any = await DB.query(query);
+
+      // Sum channels capacity and node count per ISP
+      const ispList = {};
+      for (const channel of channelsIsp) {
+        const isp1 = JSON.parse(channel.isp1);
+        const isp2 = JSON.parse(channel.isp2);
+
+        if (!ispList[isp1]) {
+          ispList[isp1] = {
+            id: channel.isp1ID.toString(),
+            capacity: 0,
+            channels: 0,
+            nodes: {},
+          };
+        } else if (ispList[isp1].id.indexOf(channel.isp1ID) === -1) {
+          ispList[isp1].id += ',' + channel.isp1ID.toString();
+        }
+
+        if (!ispList[isp2]) {
+          ispList[isp2] = {
+            id: channel.isp2ID.toString(),
+            capacity: 0,
+            channels: 0,
+            nodes: {},
+          };
+        } else if (ispList[isp2].id.indexOf(channel.isp2ID) === -1) {
+          ispList[isp2].id += ',' + channel.isp2ID.toString();
+        }
+        
+        ispList[isp1].capacity += channel.capacity;
+        ispList[isp1].channels += 1;
+        ispList[isp1].nodes[channel.node1PublicKey] = true;
+        ispList[isp2].capacity += channel.capacity;
+        ispList[isp2].channels += 1;
+        ispList[isp2].nodes[channel.node2PublicKey] = true;
+      }
+
+      const ispRanking: any[] = [];
+      for (const isp of Object.keys(ispList)) {
+        ispRanking.push([
+          ispList[isp].id,
+          isp,
+          ispList[isp].capacity,
+          ispList[isp].channels,
+          Object.keys(ispList[isp].nodes).length,
+        ]);
+      }
+
+      // Total active channels capacity
+      query = `SELECT SUM(capacity) AS capacity FROM channels WHERE status = 1`;
+      const [totalCapacity]: any = await DB.query(query);
+
+      // Get the total capacity of all channels which have at least one node on clearnet
+      query = `
+        SELECT SUM(capacity) as capacity
+        FROM (
+          SELECT capacity, GROUP_CONCAT(socket1.type, socket2.type) as networks
+          FROM channels
+          JOIN nodes_sockets socket1 ON node1_public_key = socket1.public_key
+          JOIN nodes_sockets socket2 ON node2_public_key = socket2.public_key
+          AND channels.status = 1
+          GROUP BY short_id
+        ) channels_tmp
+        WHERE channels_tmp.networks LIKE '%ipv%'
+      `;
+      const [clearnetCapacity]: any = await DB.query(query);
+
+      // Get the total capacity of all channels which have both nodes on Tor 
+      query = `
+        SELECT SUM(capacity) as capacity
+        FROM (
+          SELECT capacity, GROUP_CONCAT(socket1.type, socket2.type) as networks
+          FROM channels
+          JOIN nodes_sockets socket1 ON node1_public_key = socket1.public_key
+          JOIN nodes_sockets socket2 ON node2_public_key = socket2.public_key
+          AND channels.status = 1
+          GROUP BY short_id
+        ) channels_tmp
+        WHERE channels_tmp.networks NOT LIKE '%ipv%' AND
+          channels_tmp.networks NOT LIKE '%dns%' AND
+          channels_tmp.networks NOT LIKE '%websocket%'
+      `;
+      const [torCapacity]: any = await DB.query(query);
+
+      const clearnetCapacityValue = parseInt(clearnetCapacity[0].capacity, 10);
+      const torCapacityValue = parseInt(torCapacity[0].capacity, 10);
+      const unknownCapacityValue = parseInt(totalCapacity[0].capacity) - clearnetCapacityValue - torCapacityValue;
+
+      return {
+        clearnetCapacity: clearnetCapacityValue,
+        torCapacity: torCapacityValue,
+        unknownCapacity: unknownCapacityValue,
+        ispRanking: ispRanking,
+      };
+    } catch (e) {
+      logger.err(`Cannot get LN ISP ranking. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  public async $getNodesPerCountry(countryId: string) {
+    try {
+      const query = `
+        SELECT nodes.public_key, CAST(COALESCE(nodes.capacity, 0) as INT) as capacity, CAST(COALESCE(nodes.channels, 0) as INT) as channels,
+          nodes.alias, UNIX_TIMESTAMP(nodes.first_seen) as first_seen, UNIX_TIMESTAMP(nodes.updated_at) as updated_at,
+          geo_names_city.names as city, geo_names_country.names as country,
+          geo_names_iso.names as iso_code, geo_names_subdivision.names as subdivision,
+          nodes.longitude, nodes.latitude, nodes.as_number, geo_names_isp.names as isp
+        FROM nodes
+        LEFT JOIN geo_names geo_names_country ON geo_names_country.id = nodes.country_id AND geo_names_country.type = 'country'
+        LEFT JOIN geo_names geo_names_city ON geo_names_city.id = nodes.city_id AND geo_names_city.type = 'city'
+        LEFT JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+        LEFT JOIN geo_names geo_names_subdivision on geo_names_subdivision.id = nodes.subdivision_id AND geo_names_subdivision.type = 'division'
+        LEFT JOIN geo_names geo_names_isp on geo_names_isp.id = nodes.as_number AND geo_names_isp.type = 'as_organization'
+        WHERE geo_names_country.id = ?
+        ORDER BY capacity DESC
+      `;
+
+      const [rows]: any = await DB.query(query, [countryId]);
+      for (let i = 0; i < rows.length; ++i) {
+        rows[i].country = JSON.parse(rows[i].country);
+        rows[i].city = JSON.parse(rows[i].city);
+        rows[i].subdivision = JSON.parse(rows[i].subdivision);
+        rows[i].isp = JSON.parse(rows[i].isp);
+      }
+      return rows;
+    } catch (e) {
+      logger.err(`Cannot get nodes for country id ${countryId}. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  public async $getNodesPerISP(ISPId: string) {
+    try {
+      let query = `
+        SELECT channels.node1_public_key AS node1PublicKey, isp1.id as isp1ID,
+          channels.node2_public_key AS node2PublicKey, isp2.id as isp2ID
+        FROM channels
+        JOIN nodes node1 ON node1.public_key = channels.node1_public_key
+        JOIN nodes node2 ON node2.public_key = channels.node2_public_key
+        JOIN geo_names isp1 ON isp1.id = node1.as_number
+        JOIN geo_names isp2 ON isp2.id = node2.as_number
+        WHERE channels.status = 1 AND (node1.as_number IN (?) OR node2.as_number IN (?))
+        ORDER BY short_id DESC
+      `;
+
+      const IPSIds = ISPId.split(',');
+      const [rows]: any = await DB.query(query, [IPSIds, IPSIds]);
+      if (!rows || rows.length === 0) {
+        return [];
+      }
+
+      const nodes = {};
+
+      const intISPIds: number[] = [];
+      for (const ispId of IPSIds) {
+        intISPIds.push(parseInt(ispId, 10));
+      }
+
+      for (const channel of rows) {
+        if (intISPIds.includes(channel.isp1ID)) {
+          nodes[channel.node1PublicKey] = true;
+        }
+        if (intISPIds.includes(channel.isp2ID)) {
+          nodes[channel.node2PublicKey] = true;
+        }
+      }
+
+      query = `
+        SELECT nodes.public_key, CAST(COALESCE(nodes.capacity, 0) as INT) as capacity, CAST(COALESCE(nodes.channels, 0) as INT) as channels,
+          nodes.alias, UNIX_TIMESTAMP(nodes.first_seen) as first_seen, UNIX_TIMESTAMP(nodes.updated_at) as updated_at,
+          geo_names_city.names as city, geo_names_country.names as country,
+          geo_names_iso.names as iso_code, geo_names_subdivision.names as subdivision,
+          nodes.longitude, nodes.latitude
+        FROM nodes
+        LEFT JOIN geo_names geo_names_country ON geo_names_country.id = nodes.country_id AND geo_names_country.type = 'country'
+        LEFT JOIN geo_names geo_names_city ON geo_names_city.id = nodes.city_id AND geo_names_city.type = 'city'
+        LEFT JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+        LEFT JOIN geo_names geo_names_subdivision on geo_names_subdivision.id = nodes.subdivision_id AND geo_names_subdivision.type = 'division'
+        WHERE nodes.public_key IN (?)
+        ORDER BY capacity DESC
+      `;
+
+      const [rows2]: any = await DB.query(query, [Object.keys(nodes)]);
+      for (let i = 0; i < rows2.length; ++i) {
+        rows2[i].country = JSON.parse(rows2[i].country);
+        rows2[i].city = JSON.parse(rows2[i].city);
+        rows2[i].subdivision = JSON.parse(rows2[i].subdivision);
+      }
+      return rows2;
+
+    } catch (e) {
+      logger.err(`Cannot get nodes for ISP id ${ISPId}. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  public async $getNodesCountries() {
+    try {
+      let query = `SELECT geo_names.names as names, geo_names_iso.names as iso_code, COUNT(DISTINCT nodes.public_key) as nodesCount, SUM(capacity) as capacity
+        FROM nodes
+        JOIN geo_names ON geo_names.id = nodes.country_id AND geo_names.type = 'country'
+        JOIN geo_names geo_names_iso ON geo_names_iso.id = nodes.country_id AND geo_names_iso.type = 'country_iso_code'
+        GROUP BY country_id
+        ORDER BY COUNT(DISTINCT nodes.public_key) DESC
+      `;
+      const [nodesCountPerCountry]: any = await DB.query(query);
+
+      query = `SELECT COUNT(*) as total FROM nodes WHERE country_id IS NOT NULL`;
+      const [nodesWithAS]: any = await DB.query(query);
+
+      const nodesPerCountry: any[] = [];
+      for (const country of nodesCountPerCountry) {
+        nodesPerCountry.push({
+          name: JSON.parse(country.names),
+          iso: country.iso_code, 
+          count: country.nodesCount,
+          share: Math.floor(country.nodesCount / nodesWithAS[0].total * 10000) / 100,
+          capacity: country.capacity,
+        })
+      }
+
+      return nodesPerCountry;
+    } catch (e) {
+      logger.err(`Cannot get nodes grouped by AS. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  /**
+   * Save or update a node present in the graph
+   */
+  public async $saveNode(node: ILightningApi.Node): Promise<void> {
+    try {
+      const sockets = (node.addresses?.map(a => a.addr).join(',')) ?? '';
+      const query = `INSERT INTO nodes(
+          public_key,
+          first_seen,
+          updated_at,
+          alias,
+          alias_search,
+          color,
+          sockets,
+          status
+        )
+        VALUES (?, NOW(), FROM_UNIXTIME(?), ?, ?, ?, ?, 1)
+        ON DUPLICATE KEY UPDATE updated_at = FROM_UNIXTIME(?), alias = ?, alias_search = ?, color = ?, sockets = ?, status = 1`;
+
+      await DB.query(query, [
+        node.pub_key,
+        node.last_update,
+        node.alias,
+        this.aliasToSearchText(node.alias),
+        node.color,
+        sockets,
+        node.last_update,
+        node.alias,
+        this.aliasToSearchText(node.alias),
+        node.color,
+        sockets,
+      ]);
+    } catch (e) {
+      logger.err('$saveNode() error: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  /**
+   * Update node sockets
+   */
+  public async $updateNodeSockets(publicKey: string, sockets: {network: string; addr: string}[]): Promise<void> {
+    const formattedSockets = (sockets.map(a => a.addr).join(',')) ?? '';
+    try {
+      await DB.query(`UPDATE nodes SET sockets = ? WHERE public_key = ?`, [formattedSockets, publicKey]);
+    } catch (e) {
+      logger.err(`Cannot update node sockets for ${publicKey}. Reason: ${e instanceof Error ? e.message : e}`);
+    }
+  }
+
+  /**
+   * Set all nodes not in `nodesPubkeys` as inactive (status = 0)
+   */
+   public async $setNodesInactive(graphNodesPubkeys: string[]): Promise<void> {
+    if (graphNodesPubkeys.length === 0) {
+      return;
+    }
+
+    try {
+      const result = await DB.query<ResultSetHeader>(`
+        UPDATE nodes
+        SET status = 0
+        WHERE public_key NOT IN (
+          ${graphNodesPubkeys.map(pubkey => `"${pubkey}"`).join(',')}
+        )
+      `);
+      if (result[0].changedRows ?? 0 > 0) {
+        logger.info(`Marked ${result[0].changedRows} nodes as inactive because they are not in the graph`);
+      } else {
+        logger.debug(`Marked ${result[0].changedRows} nodes as inactive because they are not in the graph`);
+      }
+    } catch (e) {
+      logger.err('$setNodesInactive() error: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  private aliasToSearchText(str: string): string {
+    return str.replace(/[-_.]/g, ' ').replace(/[^a-zA-Z0-9 ]/g, '');
+  }
+}
+
+export default new NodesApi();

backend/src/api/explorer/nodes.routes.ts

@@ -0,0 +1,259 @@
+import config from '../../config';
+import { Application, Request, Response } from 'express';
+import nodesApi from './nodes.api';
+import DB from '../../database';
+import { INodesRanking } from '../../mempool.interfaces';
+
+class NodesRoutes {
+  constructor() { }
+
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/world', this.$getWorldNodes)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/country/:country', this.$getNodesPerCountry)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/search/:search', this.$searchNode)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/isp-ranking', this.$getISPRanking)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/isp/:isp', this.$getNodesPerISP)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/countries', this.$getNodesCountries)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/rankings', this.$getNodesRanking)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/rankings/liquidity', this.$getTopNodesByCapacity)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/rankings/connectivity', this.$getTopNodesByChannels)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/rankings/age', this.$getOldestNodes)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/:public_key/statistics', this.$getHistoricalNodeStats)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/:public_key/fees/histogram', this.$getFeeHistogram)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/:public_key', this.$getNode)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/nodes/group/:name', this.$getNodeGroup)
+    ;
+  }
+
+  private async $searchNode(req: Request, res: Response) {
+    try {
+      const nodes = await nodesApi.$searchNodeByPublicKeyOrAlias(req.params.search);
+      res.json(nodes);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getNodeGroup(req: Request, res: Response) {
+    try {
+      let nodesList;
+      let nodes: any[] = [];
+      switch (config.MEMPOOL.NETWORK) {
+        case 'testnet':
+          nodesList = ['032c7c7819276c4f706a04df1a0f1e10a5495994a7be4c1d3d28ca766e5a2b957b', '025a7e38c2834dd843591a4d23d5f09cdeb77ddca85f673c2d944a14220ff14cf7', '0395e2731a1673ef21d7a16a727c4fc4d4c35a861c428ce2c819c53d2b81c8bd55', '032ab2028c0b614c6d87824e2373529652fd7e4221b4c70cc4da7c7005c49afcf0', '029001b22fe70b48bee12d014df91982eb85ff1bd404ec772d5c83c4ee3e88d2c3', '0212e2848d79f928411da5f2ff0a8c95ec6ccb5a09d2031b6f71e91309dcde63af', '03e871a2229523d34f76e6311ff197cfe7f26c2fbec13554b93a46f4e710c47dab', '032202ec98d976b0e928bd1d91924e8bd3eab07231fc39feb3737b010071073df8', '02fa7c5a948d03d563a9f36940c2205a814e594d17c0042ced242c71a857d72605', '039c14fdec2d958e3d14cebf657451bbd9e039196615785e82c917f274e3fb2205', '033589bbcb233ffc416cefd5437c7f37e9d7cb7942d405e39e72c4c846d9b37f18', '029293110441c6e2eacb57e1255bf6ef05c41a6a676fe474922d33c19f98a7d584'];
+          break;
+        case 'signet':
+          nodesList = ['03ddab321b760433cbf561b615ef62ac7d318630c5f51d523aaf5395b90b751956', '033d92c7bfd213ef1b34c90e985fb5dc77f9ec2409d391492484e57a44c4aca1de', '02ad010dda54253c1eb9efe38b0760657a3b43ecad62198c359c051c9d99d45781', '025196512905b8a3f1597428b867bec63ec9a95e5089eb7dc7e63e2d2691669029', '027c625aa1fbe3768db68ebcb05b53b6dc0ce68b7b54b8900d326d167363e684fe', '03f1629af3101fcc56b7aac2667016be84e3defbf3d0c8719f836c9b41c9a57a43', '02dfb81e2f7a3c4c9e8a51b70ef82b4a24549cc2fab1f5b2fd636501774a918991', '02d01ccf832944c68f10d39006093769c5b8bda886d561b128534e313d729fdb34', '02499ed23027d4698a6904ff4ec1b6085a61f10b9a6937f90438f9947e38e8ea86', '038310e3a786340f2bd7770704c7ccfe560fd163d9a1c99d67894597419d12cbf7', '03e5e9d879b72c7d67ecd483bae023bd33e695bb32b981a4021260f7b9d62bc761', '028d16e1a0ace4c0c0a421536d8d32ce484dfe6e2f726b7b0e7c30f12a195f8cc7'];
+          break;
+        default:
+          nodesList = ['03fbc17549ec667bccf397ababbcb4cdc0e3394345e4773079ab2774612ec9be61', '03da9a8623241ccf95f19cd645c6cecd4019ac91570e976eb0a128bebbc4d8a437', '03ca5340cf85cb2e7cf076e489f785410838de174e40be62723e8a60972ad75144', '0238bd27f02d67d6c51e269692bc8c9a32357a00e7777cba7f4f1f18a2a700b108', '03f983dcabed6baa1eab5b56c8b2e8fdc846ab3fd931155377897335e85a9fa57c', '03e399589533581e48796e29a825839a010036a61b20744fda929d6709fcbffcc5', '021f5288b5f72c42cd0d8801086af7ce09a816d8ee9a4c47a4b436399b26cb601a', '032b01b7585f781420cd4148841a82831ba37fa952342052cec16750852d4f2dd9', '02848036488d4b8fb1f1c4064261ec36151f43b085f0b51bd239ade3ddfc940c34', '02b6b1640fe029e304c216951af9fbefdb23b0bdc9baaf327540d31b6107841fdf', '03694289827203a5b3156d753071ddd5bf92e371f5a462943f9555eef6d2d6606c', '0283d850db7c3e8ea7cc9c4abc7afaab12bbdf72b677dcba1d608350d2537d7d43'];
+      }
+
+      for (let pubKey of nodesList) {
+        try {
+          const node = await nodesApi.$getNode(pubKey);
+          if (node) {
+            nodes.push(node);
+          }
+        } catch (e) {}
+      }
+      
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(nodes);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getNode(req: Request, res: Response) {
+    try {
+      const node = await nodesApi.$getNode(req.params.public_key);
+      if (!node) {
+        res.status(404).send('Node not found');
+        return;
+      }
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(node);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getHistoricalNodeStats(req: Request, res: Response) {
+    try {
+      const statistics = await nodesApi.$getNodeStats(req.params.public_key);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(statistics);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getFeeHistogram(req: Request, res: Response) {
+    try {
+      const node = await nodesApi.$getFeeHistogram(req.params.public_key);
+      if (!node) {
+        res.status(404).send('Node not found');
+        return;
+      }
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(node);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getNodesRanking(req: Request, res: Response): Promise<void> {
+    try {
+      const topCapacityNodes = await nodesApi.$getTopCapacityNodes(false);
+      const topChannelsNodes = await nodesApi.$getTopChannelsNodes(false);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(<INodesRanking>{
+        topByCapacity: topCapacityNodes,
+        topByChannels: topChannelsNodes,
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getTopNodesByCapacity(req: Request, res: Response): Promise<void> {
+    try {
+      const topCapacityNodes = await nodesApi.$getTopCapacityNodes(true);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(topCapacityNodes);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getTopNodesByChannels(req: Request, res: Response): Promise<void> {
+    try {
+      const topCapacityNodes = await nodesApi.$getTopChannelsNodes(true);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(topCapacityNodes);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getOldestNodes(req: Request, res: Response): Promise<void> {
+    try {
+      const topCapacityNodes = await nodesApi.$getOldestNodes(true);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(topCapacityNodes);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getISPRanking(req: Request, res: Response): Promise<void> {
+    try {
+      const nodesPerAs = await nodesApi.$getNodesISPRanking();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 600).toUTCString());
+      res.json(nodesPerAs);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getWorldNodes(req: Request, res: Response) {
+    try {
+      const worldNodes = await nodesApi.$getWorldNodes();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 600).toUTCString());
+      res.json(worldNodes);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getNodesPerCountry(req: Request, res: Response) {
+    try {
+      const [country]: any[] = await DB.query(
+        `SELECT geo_names.id, geo_names_country.names as country_names
+        FROM geo_names
+        JOIN geo_names geo_names_country on geo_names.id = geo_names_country.id AND geo_names_country.type = 'country'
+        WHERE geo_names.type = 'country_iso_code' AND geo_names.names = ?`,
+        [req.params.country]
+      );
+
+      if (country.length === 0) {
+        res.status(404).send(`This country does not exist or does not host any lightning nodes on clearnet`);
+        return;
+      }
+
+      const nodes = await nodesApi.$getNodesPerCountry(country[0].id);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json({
+        country: JSON.parse(country[0].country_names),
+        nodes: nodes,
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getNodesPerISP(req: Request, res: Response) {
+    try {
+      const [isp]: any[] = await DB.query(
+        `SELECT geo_names.names as isp_name
+        FROM geo_names
+        WHERE geo_names.type = 'as_organization' AND geo_names.id = ?`,
+        [req.params.isp]
+      );
+
+      if (isp.length === 0) {
+        res.status(404).send(`This ISP does not exist or does not host any lightning nodes on clearnet`);
+        return;
+      }
+
+      const nodes = await nodesApi.$getNodesPerISP(req.params.isp);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json({
+        isp: JSON.parse(isp[0].isp_name),
+        nodes: nodes,
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getNodesCountries(req: Request, res: Response) {
+    try {
+      const nodesPerAs = await nodesApi.$getNodesCountries();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 600).toUTCString());
+      res.json(nodesPerAs);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+}
+
+export default new NodesRoutes();

backend/src/api/explorer/statistics.api.ts

@@ -0,0 +1,53 @@
+import logger from '../../logger';
+import DB from '../../database';
+import { Common } from '../common';
+
+class StatisticsApi {
+  public async $getStatistics(interval: string | null = null): Promise<any> {
+    interval = Common.getSqlInterval(interval);
+
+    let query = `SELECT UNIX_TIMESTAMP(added) AS added, channel_count, total_capacity,
+      tor_nodes, clearnet_nodes, unannounced_nodes, clearnet_tor_nodes
+      FROM lightning_stats`;
+
+    if (interval) {
+      query += ` WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    query += ` ORDER BY added DESC`;
+
+    try {
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getStatistics error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getLatestStatistics(): Promise<any> {
+    try {
+      const [rows]: any = await DB.query(`SELECT * FROM lightning_stats ORDER BY added DESC LIMIT 1`);
+      const [rows2]: any = await DB.query(`SELECT * FROM lightning_stats WHERE DATE(added) = DATE(NOW() - INTERVAL 7 DAY)`);
+      return {
+        latest: rows[0],
+        previous: rows2[0],
+      };
+    } catch (e) {
+      logger.err('$getLatestStatistics error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getStatisticsCount(): Promise<number> {
+    try {
+      const [rows]: any = await DB.query(`SELECT count(*) as count FROM lightning_stats`);
+      return rows[0].count;
+    } catch (e) {
+      logger.err('$getLatestStatistics error: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+}
+
+export default new StatisticsApi();

backend/src/api/fee-api.ts

@@ -1,12 +1,12 @@
-import config from '../config';
 import { MempoolBlock } from '../mempool.interfaces';
+import { Common } from './common';
 import mempool from './mempool';
 import projectedBlocks from './mempool-blocks';
 
 class FeeApi {
   constructor() { }
 
-  defaultFee = config.MEMPOOL.NETWORK === 'liquid' ? 0.1 : 1;
+  defaultFee = Common.isLiquid() ? 0.1 : 1;
 
   public getRecommendedFee() {
     const pBlocks = projectedBlocks.getMempoolBlocks();
@@ -18,6 +18,7 @@ class FeeApi {
         'fastestFee': this.defaultFee,
         'halfHourFee': this.defaultFee,
         'hourFee': this.defaultFee,
+        'economyFee': minimumFee,
         'minimumFee': minimumFee,
       };
     }
@@ -30,6 +31,7 @@ class FeeApi {
       'fastestFee': firstMedianFee,
       'halfHourFee': secondMedianFee,
       'hourFee': thirdMedianFee,
+      'economyFee': Math.min(2 * minimumFee, thirdMedianFee),
       'minimumFee': minimumFee,
     };
   }

backend/src/api/fetch-version.ts

@@ -0,0 +1,37 @@
+import fs from 'fs';
+import path from "path";
+const { spawnSync } = require('child_process');
+
+function getVersion(): string {
+  const packageJson = fs.readFileSync('package.json').toString();
+  return JSON.parse(packageJson).version;
+}
+
+function getGitCommit(): string {
+  if (process.env.MEMPOOL_COMMIT_HASH) {
+    return process.env.MEMPOOL_COMMIT_HASH;
+  } else {
+    const gitRevParse = spawnSync('git', ['rev-parse', '--short', 'HEAD']);
+    if (!gitRevParse.error) {
+      const output = gitRevParse.stdout.toString('utf-8').replace(/[\n\r\s]+$/, '');
+      if (output) {
+        return output;
+      } else {
+        console.log('Could not fetch git commit: No repo available');
+      }
+    } else if (gitRevParse.error.code === 'ENOENT') {
+      console.log('Could not fetch git commit: Command `git` is unavailable');
+    }
+  }
+  return '?';
+}
+
+const versionInfo = {
+  version: getVersion(),
+  gitCommit: getGitCommit()
+}
+
+fs.writeFileSync(
+  path.join(__dirname, 'version.json'),
+  JSON.stringify(versionInfo, null, 2) + "\n"
+);

backend/src/api/fiat-conversion.ts

@@ -1,22 +1,39 @@
 import logger from '../logger';
-import axios from 'axios';
+import * as http from 'http';
+import * as https from 'https';
+import axios, { AxiosResponse } from 'axios';
 import { IConversionRates } from '../mempool.interfaces';
 import config from '../config';
+import backendInfo from './backend-info';
+import { SocksProxyAgent } from 'socks-proxy-agent';
 
 class FiatConversion {
-  private conversionRates: IConversionRates = {
-    'USD': 0
-  };
+  private debasingFiatCurrencies = ['AED', 'AUD', 'BDT', 'BHD', 'BMD', 'BRL', 'CAD', 'CHF', 'CLP',
+    'CNY', 'CZK', 'DKK', 'EUR', 'GBP', 'HKD', 'HUF', 'IDR', 'ILS', 'INR', 'JPY', 'KRW', 'KWD',
+    'LKR', 'MMK', 'MXN', 'MYR', 'NGN', 'NOK', 'NZD', 'PHP', 'PKR', 'PLN', 'RUB', 'SAR', 'SEK',
+    'SGD', 'THB', 'TRY', 'TWD', 'UAH', 'USD', 'VND', 'ZAR'];
+  private conversionRates: IConversionRates = {};
   private ratesChangedCallback: ((rates: IConversionRates) => void) | undefined;
+  public ratesInitialized = false; // If true, it means rates are ready for use
 
-  constructor() { }
+  constructor() {
+    for (const fiat of this.debasingFiatCurrencies) {
+      this.conversionRates[fiat] = 0;
+    }
+  }
 
   public setProgressChangedCallback(fn: (rates: IConversionRates) => void) {
     this.ratesChangedCallback = fn;
   }
 
   public startService() {
+    const fiatConversionUrl = (config.SOCKS5PROXY.ENABLED === true) && (config.SOCKS5PROXY.USE_ONION === true) ? config.PRICE_DATA_SERVER.TOR_URL : config.PRICE_DATA_SERVER.CLEARNET_URL;
     logger.info('Starting currency rates service');
+    if (config.SOCKS5PROXY.ENABLED) {
+      logger.info(`Currency rates service will be queried over the Tor network using ${fiatConversionUrl}`);
+    } else {
+      logger.info(`Currency rates service will be queried over clearnet using ${config.PRICE_DATA_SERVER.CLEARNET_URL}`);
+    }
     setInterval(this.updateCurrency.bind(this), 1000 * config.MEMPOOL.PRICE_FEED_UPDATE_INTERVAL);
     this.updateCurrency();
   }
@@ -26,17 +43,79 @@ class FiatConversion {
   }
 
   private async updateCurrency(): Promise<void> {
-    try {
-      const response = await axios.get('https://price.bisq.wiz.biz/getAllMarketPrices', { timeout: 10000 });
-      const usd = response.data.data.find((item: any) => item.currencyCode === 'USD');
-      this.conversionRates = {
-        'USD': usd.price,
+    type axiosOptions = {
+      headers: {
+        'User-Agent': string
       };
-      if (this.ratesChangedCallback) {
-        this.ratesChangedCallback(this.conversionRates);
+      timeout: number;
+      httpAgent?: http.Agent;
+      httpsAgent?: https.Agent;
+    }
+    const setDelay = (secs: number = 1): Promise<void> => new Promise(resolve => setTimeout(() => resolve(), secs * 1000));
+    const fiatConversionUrl = (config.SOCKS5PROXY.ENABLED === true) && (config.SOCKS5PROXY.USE_ONION === true) ? config.PRICE_DATA_SERVER.TOR_URL : config.PRICE_DATA_SERVER.CLEARNET_URL;
+    const isHTTP = (new URL(fiatConversionUrl).protocol.split(':')[0] === 'http') ? true : false;
+    const axiosOptions: axiosOptions = {
+      headers: {
+        'User-Agent': (config.MEMPOOL.USER_AGENT === 'mempool') ? `mempool/v${backendInfo.getBackendInfo().version}` : `${config.MEMPOOL.USER_AGENT}`
+      },
+      timeout: config.SOCKS5PROXY.ENABLED ? 30000 : 10000
+    };
+
+    let retry = 0;
+
+    while(retry < config.MEMPOOL.EXTERNAL_MAX_RETRY) {
+      try {
+        if (config.SOCKS5PROXY.ENABLED) {
+          let socksOptions: any = {
+            agentOptions: {
+              keepAlive: true,
+            },
+            hostname: config.SOCKS5PROXY.HOST,
+            port: config.SOCKS5PROXY.PORT
+          };
+
+          if (config.SOCKS5PROXY.USERNAME && config.SOCKS5PROXY.PASSWORD) {
+            socksOptions.username = config.SOCKS5PROXY.USERNAME;
+            socksOptions.password = config.SOCKS5PROXY.PASSWORD;
+          } else {
+            // Retry with different tor circuits https://stackoverflow.com/a/64960234
+            socksOptions.username = `circuit${retry}`;
+          }
+
+          // Handle proxy agent for onion addresses
+          if (isHTTP) {
+            axiosOptions.httpAgent = new SocksProxyAgent(socksOptions);
+          } else {
+            axiosOptions.httpsAgent = new SocksProxyAgent(socksOptions);
+          }
+        }
+        
+        logger.debug('Querying currency rates service...');
+
+        const response: AxiosResponse = await axios.get(`${fiatConversionUrl}`, axiosOptions);
+
+        if (response.statusText === 'error' || !response.data) {
+          throw new Error(`Could not fetch data from ${fiatConversionUrl}, Error: ${response.status}`);
+        }
+
+        for (const rate of response.data.data) {
+          if (this.debasingFiatCurrencies.includes(rate.currencyCode) && rate.provider === 'Bisq-Aggregate') {
+            this.conversionRates[rate.currencyCode] = Math.round(100 * rate.price) / 100;
+          }
+        }
+
+        this.ratesInitialized = true;
+        logger.debug(`USD Conversion Rate: ${this.conversionRates.USD}`);
+
+        if (this.ratesChangedCallback) {
+          this.ratesChangedCallback(this.conversionRates);
+        }
+        break;
+      } catch (e) {
+        logger.err('Error updating fiat conversion rates: '  + (e instanceof Error ? e.message : e));
+        await setDelay(config.MEMPOOL.EXTERNAL_RETRY_INTERVAL);
+        retry++;
       }
-    } catch (e) {
-      logger.err('Error updating fiat conversion rates: ' + (e instanceof Error ? e.message : e));
     }
   }
 }

backend/src/api/lightning/clightning/clightning-client.ts

@@ -0,0 +1,272 @@
+// Imported from https://github.com/shesek/lightning-client-js
+
+'use strict';
+
+const methods = [
+  'addgossip',
+  'autocleaninvoice',
+  'check',
+  'checkmessage',
+  'close',
+  'connect',
+  'createinvoice',
+  'createinvoicerequest',
+  'createoffer',
+  'createonion',
+  'decode',
+  'decodepay',
+  'delexpiredinvoice',
+  'delinvoice',
+  'delpay',
+  'dev-listaddrs',
+  'dev-rescan-outputs',
+  'disableoffer',
+  'disconnect',
+  'estimatefees',
+  'feerates',
+  'fetchinvoice',
+  'fundchannel',
+  'fundchannel_cancel',
+  'fundchannel_complete',
+  'fundchannel_start',
+  'fundpsbt',
+  'getchaininfo',
+  'getinfo',
+  'getlog',
+  'getrawblockbyheight',
+  'getroute',
+  'getsharedsecret',
+  'getutxout',
+  'help',
+  'invoice',
+  'keysend',
+  'legacypay',
+  'listchannels',
+  'listconfigs',
+  'listforwards',
+  'listfunds',
+  'listinvoices',
+  'listnodes',
+  'listoffers',
+  'listpays',
+  'listpeers',
+  'listsendpays',
+  'listtransactions',
+  'multifundchannel',
+  'multiwithdraw',
+  'newaddr',
+  'notifications',
+  'offer',
+  'offerout',
+  'openchannel_abort',
+  'openchannel_bump',
+  'openchannel_init',
+  'openchannel_signed',
+  'openchannel_update',
+  'pay',
+  'payersign',
+  'paystatus',
+  'ping',
+  'plugin',
+  'reserveinputs',
+  'sendinvoice',
+  'sendonion',
+  'sendonionmessage',
+  'sendpay',
+  'sendpsbt',
+  'sendrawtransaction',
+  'setchannelfee',
+  'signmessage',
+  'signpsbt',
+  'stop',
+  'txdiscard',
+  'txprepare',
+  'txsend',
+  'unreserveinputs',
+  'utxopsbt',
+  'waitanyinvoice',
+  'waitblockheight',
+  'waitinvoice',
+  'waitsendpay',
+  'withdraw'
+];
+
+
+import EventEmitter from 'events';
+import { existsSync, statSync } from 'fs';
+import { createConnection, Socket } from 'net';
+import { homedir } from 'os';
+import path from 'path';
+import { createInterface, Interface } from 'readline';
+import logger from '../../../logger';
+import { AbstractLightningApi } from '../lightning-api-abstract-factory';
+import { ILightningApi } from '../lightning-api.interface';
+import { convertAndmergeBidirectionalChannels, convertNode } from './clightning-convert';
+
+class LightningError extends Error {
+  type: string = 'lightning';
+  message: string = 'lightning-client error';
+
+  constructor(error) {
+    super();
+    this.type = error.type;
+    this.message = error.message;
+  }
+}
+
+const defaultRpcPath = path.join(homedir(), '.lightning')
+  , fStat = (...p) => statSync(path.join(...p))
+  , fExists = (...p) => existsSync(path.join(...p))
+
+export default class CLightningClient extends EventEmitter implements AbstractLightningApi {
+  private rpcPath: string;
+  private reconnectWait: number;
+  private reconnectTimeout;
+  private reqcount: number;
+  private client: Socket;
+  private rl: Interface;
+  private clientConnectionPromise: Promise<unknown>;
+
+  constructor(rpcPath = defaultRpcPath) {
+    if (!path.isAbsolute(rpcPath)) {
+      throw new Error('The rpcPath must be an absolute path');
+    }
+
+    if (!fExists(rpcPath) || !fStat(rpcPath).isSocket()) {
+      // network directory provided, use the lightning-rpc within in
+      if (fExists(rpcPath, 'lightning-rpc')) {
+        rpcPath = path.join(rpcPath, 'lightning-rpc');
+      }
+
+      // main data directory provided, default to using the bitcoin mainnet subdirectory
+      // to be removed in v0.2.0
+      else if (fExists(rpcPath, 'bitcoin', 'lightning-rpc')) {
+        logger.warn(`[CLightningClient] ${rpcPath}/lightning-rpc is missing, using the bitcoin mainnet subdirectory at ${rpcPath}/bitcoin instead.`)
+        logger.warn(`[CLightningClient] specifying the main lightning data directory is deprecated, please specify the network directory explicitly.\n`)
+        rpcPath = path.join(rpcPath, 'bitcoin', 'lightning-rpc')
+      }
+    }
+
+    logger.debug(`[CLightningClient] Connecting to ${rpcPath}`);
+
+    super();
+    this.rpcPath = rpcPath;
+    this.reconnectWait = 0.5;
+    this.reconnectTimeout = null;
+    this.reqcount = 0;
+
+    const _self = this;
+
+    this.client = createConnection(rpcPath).on(
+      'error', () => {
+        _self.increaseWaitTime();
+        _self.reconnect();
+      }
+    );
+    this.rl = createInterface({ input: this.client }).on(
+      'error', () => {
+        _self.increaseWaitTime();
+        _self.reconnect();
+      }
+    );
+
+    this.clientConnectionPromise = new Promise<void>(resolve => {
+      _self.client.on('connect', () => {
+        logger.info(`[CLightningClient] Lightning client connected`);
+        _self.reconnectWait = 1;
+        resolve();
+      });
+
+      _self.client.on('end', () => {
+        logger.err('[CLightningClient] Lightning client connection closed, reconnecting');
+        _self.increaseWaitTime();
+        _self.reconnect();
+      });
+
+      _self.client.on('error', error => {
+        logger.err(`[CLightningClient] Lightning client connection error: ${error}`);
+        _self.increaseWaitTime();
+        _self.reconnect();
+      });
+    });
+
+    this.rl.on('line', line => {
+      line = line.trim();
+      if (!line) {
+        return;
+      }
+      const data = JSON.parse(line);
+      // logger.debug(`[CLightningClient] #${data.id} <-- ${JSON.stringify(data.error || data.result)}`);
+      _self.emit('res:' + data.id, data);
+    });
+  }
+
+  increaseWaitTime(): void {
+    if (this.reconnectWait >= 16) {
+      this.reconnectWait = 16;
+    } else {
+      this.reconnectWait *= 2;
+    }
+  }
+
+  reconnect(): void {
+    const _self = this;
+
+    if (this.reconnectTimeout) {
+      return;
+    }
+
+    this.reconnectTimeout = setTimeout(() => {
+      logger.debug('[CLightningClient] Trying to reconnect...');
+
+      _self.client.connect(_self.rpcPath);
+      _self.reconnectTimeout = null;
+    }, this.reconnectWait * 1000);
+  }
+
+  call(method, args = []): Promise<any> {
+    const _self = this;
+
+    const callInt = ++this.reqcount;
+    const sendObj = {
+      jsonrpc: '2.0',
+      method,
+      params: args,
+      id: '' + callInt
+    };
+
+    // logger.debug(`[CLightningClient] #${callInt} --> ${method} ${args}`);
+
+    // Wait for the client to connect
+    return this.clientConnectionPromise
+      .then(() => new Promise((resolve, reject) => {
+        // Wait for a response
+        this.once('res:' + callInt, res => res.error == null
+          ? resolve(res.result)
+          : reject(new LightningError(res.error))
+        );
+
+        // Send the command
+        _self.client.write(JSON.stringify(sendObj));
+      }));
+  }
+
+  async $getNetworkGraph(): Promise<ILightningApi.NetworkGraph> {
+    const listnodes: any[] = await this.call('listnodes');
+    const listchannels: any[] = await this.call('listchannels');
+    const channelsList = await convertAndmergeBidirectionalChannels(listchannels['channels']);
+
+    return {
+      nodes: listnodes['nodes'].map(node => convertNode(node)),
+      edges: channelsList,
+    };
+  }
+}
+
+const protify = s => s.replace(/-([a-z])/g, m => m[1].toUpperCase());
+
+methods.forEach(k => {
+  CLightningClient.prototype[protify(k)] = function (...args: any) {
+    return this.call(k, args);
+  };
+});

backend/src/api/lightning/clightning/clightning-convert.ts

@@ -0,0 +1,147 @@
+import { ILightningApi } from '../lightning-api.interface';
+import FundingTxFetcher from '../../../tasks/lightning/sync-tasks/funding-tx-fetcher';
+import logger from '../../../logger';
+import { Common } from '../../common';
+
+/**
+ * Convert a clightning "listnode" entry to a lnd node entry
+ */
+export function convertNode(clNode: any): ILightningApi.Node {
+  let custom_records: { [type: number]: string } | undefined = undefined;
+  if (clNode.option_will_fund) {
+    try {
+      custom_records = { '1': Buffer.from(clNode.option_will_fund.compact_lease || '', 'hex').toString('base64') };
+    } catch (e) {
+      logger.err(`Cannot decode option_will_fund compact_lease for ${clNode.nodeid}). Reason: ` + (e instanceof Error ? e.message : e));
+      custom_records = undefined;
+    }
+  }
+  return {
+    alias: clNode.alias ?? '',
+    color: `#${clNode.color ?? ''}`,
+    features: [], // TODO parse and return clNode.feature
+    pub_key: clNode.nodeid,
+    addresses: clNode.addresses?.map((addr) => {
+      let address = addr.address;
+      if (addr.type === 'ipv6') {
+        address = `[${address}]`;
+      }
+      return {
+        network: addr.type,
+        addr: `${address}:${addr.port}`
+      };
+    }) ?? [],
+    last_update: clNode?.last_timestamp ?? 0,
+    custom_records
+  };
+}
+
+/**
+ * Convert clightning "listchannels" response to lnd "describegraph.edges" format
+ */
+export async function convertAndmergeBidirectionalChannels(clChannels: any[]): Promise<ILightningApi.Channel[]> {
+  logger.info('Converting clightning nodes and channels to lnd graph format');
+
+  let loggerTimer = new Date().getTime() / 1000;
+  let channelProcessed = 0;
+
+  const consolidatedChannelList: ILightningApi.Channel[] = [];
+  const clChannelsDict = {};
+  const clChannelsDictCount = {};
+
+  for (const clChannel of clChannels) {
+    if (!clChannelsDict[clChannel.short_channel_id]) {
+      clChannelsDict[clChannel.short_channel_id] = clChannel;
+      clChannelsDictCount[clChannel.short_channel_id] = 1;
+    } else {
+      consolidatedChannelList.push(
+        await buildFullChannel(clChannel, clChannelsDict[clChannel.short_channel_id])
+      );
+      delete clChannelsDict[clChannel.short_channel_id];
+      clChannelsDictCount[clChannel.short_channel_id]++;
+    }
+
+    const elapsedSeconds = Math.round((new Date().getTime() / 1000) - loggerTimer);
+    if (elapsedSeconds > 10) {
+      logger.info(`Building complete channels from clightning output. Channels processed: ${channelProcessed + 1} of ${clChannels.length}`);
+      loggerTimer = new Date().getTime() / 1000;
+    }
+
+    ++channelProcessed;
+  }
+
+  channelProcessed = 0;
+  const keys = Object.keys(clChannelsDict);
+  for (const short_channel_id of keys) {
+    consolidatedChannelList.push(await buildIncompleteChannel(clChannelsDict[short_channel_id]));
+
+    const elapsedSeconds = Math.round((new Date().getTime() / 1000) - loggerTimer);
+    if (elapsedSeconds > 10) {
+      logger.info(`Building partial channels from clightning output. Channels processed: ${channelProcessed + 1} of ${keys.length}`);
+      loggerTimer = new Date().getTime() / 1000;
+    }
+
+    channelProcessed++;
+  }
+
+  return consolidatedChannelList;
+}
+
+/**
+ * Convert two clightning "getchannels" entries into a full a lnd "describegraph.edges" format
+ * In this case, clightning knows the channel policy for both nodes
+ */
+async function buildFullChannel(clChannelA: any, clChannelB: any): Promise<ILightningApi.Channel> {
+  const lastUpdate = Math.max(clChannelA.last_update ?? 0, clChannelB.last_update ?? 0);
+
+  const tx = await FundingTxFetcher.$fetchChannelOpenTx(clChannelA.short_channel_id);
+  const parts = clChannelA.short_channel_id.split('x');
+  const outputIdx = parts[2];
+
+  return {
+    channel_id: Common.channelShortIdToIntegerId(clChannelA.short_channel_id),
+    capacity: clChannelA.satoshis,
+    last_update: lastUpdate,
+    node1_policy: convertPolicy(clChannelA),
+    node2_policy: convertPolicy(clChannelB),
+    chan_point: `${tx.txid}:${outputIdx}`,
+    node1_pub: clChannelA.source,
+    node2_pub: clChannelB.source,
+  };
+}
+
+/**
+ * Convert one clightning "getchannels" entry into a full a lnd "describegraph.edges" format
+ * In this case, clightning knows the channel policy of only one node
+ */
+async function buildIncompleteChannel(clChannel: any): Promise<ILightningApi.Channel> {
+  const tx = await FundingTxFetcher.$fetchChannelOpenTx(clChannel.short_channel_id);
+  const parts = clChannel.short_channel_id.split('x');
+  const outputIdx = parts[2];
+
+  return {
+    channel_id: Common.channelShortIdToIntegerId(clChannel.short_channel_id),
+    capacity: clChannel.satoshis,
+    last_update: clChannel.last_update ?? 0,
+    node1_policy: convertPolicy(clChannel),
+    node2_policy: null,
+    chan_point: `${tx.txid}:${outputIdx}`,
+    node1_pub: clChannel.source,
+    node2_pub: clChannel.destination,
+  };
+}
+
+/**
+ * Convert a clightning "listnode" response to a lnd channel policy format
+ */
+function convertPolicy(clChannel: any): ILightningApi.RoutingPolicy {
+  return {
+    time_lock_delta: clChannel.delay,
+    min_htlc: clChannel.htlc_minimum_msat.slice(0, -4),
+    max_htlc_msat: clChannel.htlc_maximum_msat.slice(0, -4),
+    fee_base_msat: clChannel.base_fee_millisatoshi,
+    fee_rate_milli_msat: clChannel.fee_per_millionth,
+    disabled: !clChannel.active,
+    last_update: clChannel.last_update ?? 0,
+  };
+}

backend/src/api/lightning/lightning-api-abstract-factory.ts

@@ -0,0 +1,5 @@
+import { ILightningApi } from './lightning-api.interface';
+
+export interface AbstractLightningApi {
+  $getNetworkGraph(): Promise<ILightningApi.NetworkGraph>;
+}

backend/src/api/lightning/lightning-api-factory.ts

@@ -0,0 +1,16 @@
+import config from '../../config';
+import CLightningClient from './clightning/clightning-client';
+import { AbstractLightningApi } from './lightning-api-abstract-factory';
+import LndApi from './lnd/lnd-api';
+
+function lightningApiFactory(): AbstractLightningApi {
+  switch (config.LIGHTNING.ENABLED === true && config.LIGHTNING.BACKEND) {
+    case 'cln':
+      return new CLightningClient(config.CLIGHTNING.SOCKET);
+    case 'lnd':
+    default:
+      return new LndApi();
+  }
+}
+
+export default lightningApiFactory();

backend/src/api/lightning/lightning-api.interface.ts

@@ -0,0 +1,92 @@
+export namespace ILightningApi {
+  export interface NetworkInfo {
+    graph_diameter: number;
+    avg_out_degree: number;
+    max_out_degree: number;
+    num_nodes: number;
+    num_channels: number;
+    total_network_capacity: string;
+    avg_channel_size: number;
+    min_channel_size: string;
+    max_channel_size: string;
+    median_channel_size_sat: string;
+    num_zombie_chans: string;
+  }
+
+  export interface NetworkGraph {
+    nodes: Node[];
+    edges: Channel[];
+  }
+
+  export interface Channel {
+    channel_id: string;
+    chan_point: string;
+    last_update: number;
+    node1_pub: string;
+    node2_pub: string;
+    capacity: string;
+    node1_policy: RoutingPolicy | null;
+    node2_policy: RoutingPolicy | null;
+  }
+
+  export interface RoutingPolicy {
+    time_lock_delta: number;
+    min_htlc: string;
+    fee_base_msat: string;
+    fee_rate_milli_msat: string;
+    disabled: boolean;
+    max_htlc_msat: string;
+    last_update: number;
+  }
+
+  export interface Node {
+    last_update: number;
+    pub_key: string;
+    alias: string;
+    addresses: {
+      network: string;
+      addr: string;
+    }[];
+    color: string;
+    features: { [key: number]: Feature };
+    custom_records?: { [type: number]: string };
+  }
+
+  export interface Info {
+    identity_pubkey: string;
+    alias: string;
+    num_pending_channels: number;
+    num_active_channels: number;
+    num_peers: number;
+    block_height: number;
+    block_hash: string;
+    synced_to_chain: boolean;
+    testnet: boolean;
+    uris: string[];
+    best_header_timestamp: string;
+    version: string;
+    num_inactive_channels: number;
+    chains: {
+      chain: string;
+      network: string;
+    }[];
+    color: string;
+    synced_to_graph: boolean;
+    features: { [key: number]: Feature };
+    commit_hash: string;
+    /** Available on LND since v0.15.0-beta */
+    require_htlc_interceptor?: boolean;
+  }
+
+  export interface Feature {
+    name: string;
+    is_required: boolean;
+    is_known: boolean;
+  }
+
+  export interface ForensicOutput {
+    node?: 1 | 2;
+    type: number;
+    value: number;
+  }
+}

backend/src/api/lightning/lnd/lnd-api.ts

@@ -0,0 +1,41 @@
+import axios, { AxiosRequestConfig } from 'axios';
+import { Agent } from 'https';
+import * as fs from 'fs';
+import { AbstractLightningApi } from '../lightning-api-abstract-factory';
+import { ILightningApi } from '../lightning-api.interface';
+import config from '../../../config';
+
+class LndApi implements AbstractLightningApi {
+  axiosConfig: AxiosRequestConfig = {};
+
+  constructor() {
+    if (config.LIGHTNING.ENABLED) {
+      this.axiosConfig = {
+        headers: {
+          'Grpc-Metadata-macaroon': fs.readFileSync(config.LND.MACAROON_PATH).toString('hex')
+        },
+        httpsAgent: new Agent({
+          ca: fs.readFileSync(config.LND.TLS_CERT_PATH)
+        }),
+        timeout: 10000
+      };
+    }
+  }
+
+  async $getNetworkInfo(): Promise<ILightningApi.NetworkInfo> {
+    return axios.get<ILightningApi.NetworkInfo>(config.LND.REST_API_URL + '/v1/graph/info', this.axiosConfig)
+      .then((response) => response.data);
+  }
+
+  async $getInfo(): Promise<ILightningApi.Info> {
+    return axios.get<ILightningApi.Info>(config.LND.REST_API_URL + '/v1/getinfo', this.axiosConfig)
+      .then((response) => response.data);
+  }
+
+  async $getNetworkGraph(): Promise<ILightningApi.NetworkGraph> {
+    return axios.get<ILightningApi.NetworkGraph>(config.LND.REST_API_URL + '/v1/graph', this.axiosConfig)
+      .then((response) => response.data);
+  }
+}
+
+export default LndApi;

backend/src/api/liquid/elements-parser.ts

@@ -2,7 +2,7 @@ import { IBitcoinApi } from '../bitcoin/bitcoin-api.interface';
 import bitcoinClient from '../bitcoin/bitcoin-client';
 import bitcoinSecondClient from '../bitcoin/bitcoin-second-client';
 import { Common } from '../common';
-import { DB } from '../../database';
+import DB from '../../database';
 import logger from '../../logger';
 
 class ElementsParser {
@@ -33,10 +33,8 @@ class ElementsParser {
   }
 
   public async $getPegDataByMonth(): Promise<any> {
-    const connection = await DB.pool.getConnection();
     const query = `SELECT SUM(amount) AS amount, DATE_FORMAT(FROM_UNIXTIME(datetime), '%Y-%m-01') AS date FROM elements_pegs GROUP BY DATE_FORMAT(FROM_UNIXTIME(datetime), '%Y%m')`;
-    const [rows] = await connection.query<any>(query);
-    connection.release();
+    const [rows] = await DB.query(query);
     return rows;
   }
 
@@ -79,7 +77,6 @@ class ElementsParser {
 
   protected async $savePegToDatabase(height: number, blockTime: number, amount: number, txid: string,
     txindex: number, bitcoinaddress: string, bitcointxid: string, bitcoinindex: number, final_tx: number): Promise<void> {
-    const connection = await DB.pool.getConnection();
     const query = `INSERT INTO elements_pegs(
         block, datetime, amount, txid, txindex, bitcoinaddress, bitcointxid, bitcoinindex, final_tx
       ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`;
@@ -87,24 +84,19 @@ class ElementsParser {
     const params: (string | number)[] = [
       height, blockTime, amount, txid, txindex, bitcoinaddress, bitcointxid, bitcoinindex, final_tx
     ];
-    await connection.query(query, params);
-    connection.release();
+    await DB.query(query, params);
     logger.debug(`Saved L-BTC peg from block height #${height} with TXID ${txid}.`);
   }
 
   protected async $getLatestBlockHeightFromDatabase(): Promise<number> {
-    const connection = await DB.pool.getConnection();
     const query = `SELECT number FROM state WHERE name = 'last_elements_block'`;
-    const [rows] = await connection.query<any>(query);
-    connection.release();
+    const [rows] = await DB.query(query);
     return rows[0]['number'];
   }
 
   protected async $saveLatestBlockToDatabase(blockHeight: number) {
-    const connection = await DB.pool.getConnection();
     const query = `UPDATE state SET number = ? WHERE name = 'last_elements_block'`;
-    await connection.query<any>(query, [blockHeight]);
-    connection.release();
+    await DB.query(query, [blockHeight]);
   }
 }
 

backend/src/api/liquid/icons.ts

@@ -1,5 +1,4 @@
 import * as fs from 'fs';
-import config from '../../config';
 import logger from '../../logger';
 
 class Icons {

backend/src/api/liquid/liquid.routes.ts

@@ -0,0 +1,73 @@
+import axios from 'axios';
+import { Application, Request, Response } from 'express';
+import config from '../../config';
+import elementsParser from './elements-parser';
+import icons from './icons';
+
+class LiquidRoutes {
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'assets/icons', this.getAllLiquidIcon)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'assets/featured', this.$getAllFeaturedLiquidAssets)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'asset/:assetId/icon', this.getLiquidIcon)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'assets/group/:id', this.$getAssetGroup)
+      ;
+    
+    if (config.DATABASE.ENABLED) {
+      app
+        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs/month', this.$getElementsPegsByMonth)
+        ;
+    }
+  }
+
+
+  private getLiquidIcon(req: Request, res: Response) {
+    const result = icons.getIconByAssetId(req.params.assetId);
+    if (result) {
+      res.setHeader('content-type', 'image/png');
+      res.setHeader('content-length', result.length);
+      res.send(result);
+    } else {
+      res.status(404).send('Asset icon not found');
+    }
+  }
+
+  private getAllLiquidIcon(req: Request, res: Response) {
+    const result = icons.getAllIconIds();
+    if (result) {
+      res.json(result);
+    } else {
+      res.status(404).send('Asset icons not found');
+    }
+  }
+
+  private async $getAllFeaturedLiquidAssets(req: Request, res: Response) {
+    try {
+      const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.LIQUID_API}/assets/featured`, { responseType: 'stream', timeout: 10000 });
+      response.data.pipe(res);
+    } catch (e) {
+      res.status(500).end();
+    }
+  }
+
+  private async $getAssetGroup(req: Request, res: Response) {
+    try {
+      const response = await axios.get(`${config.EXTERNAL_DATA_SERVER.LIQUID_API}/assets/group/${parseInt(req.params.id, 10)}`,
+        { responseType: 'stream', timeout: 10000 });
+      response.data.pipe(res);
+    } catch (e) {
+      res.status(500).end();
+    }
+  }
+
+  private async $getElementsPegsByMonth(req: Request, res: Response) {
+    try {
+      const pegs = await elementsParser.$getPegDataByMonth();
+      res.json(pegs);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+}
+
+export default new LiquidRoutes();

backend/src/api/loading-indicators.ts

@@ -12,8 +12,8 @@ class LoadingIndicators {
     this.progressChangedCallback = fn;
   }
 
-  public setProgress(name: string, progressPercent: number) {
-    const newProgress = Math.round(progressPercent);
+  public setProgress(name: string, progressPercent: number, rounded: boolean = true) {
+    const newProgress = rounded === true ? Math.round(progressPercent) : progressPercent;
     if (newProgress >= 100) {
       delete this.loadingIndicators[name];
     } else {

backend/src/api/mempool-blocks.ts

@@ -1,10 +1,17 @@
 import logger from '../logger';
-import { MempoolBlock, TransactionExtended, MempoolBlockWithTransactions } from '../mempool.interfaces';
+import { MempoolBlock, TransactionExtended, TransactionStripped, MempoolBlockWithTransactions, MempoolBlockDelta } from '../mempool.interfaces';
 import { Common } from './common';
 import config from '../config';
+import { StaticPool } from 'node-worker-threads-pool';
+import path from 'path';
 
 class MempoolBlocks {
   private mempoolBlocks: MempoolBlockWithTransactions[] = [];
+  private mempoolBlockDeltas: MempoolBlockDelta[] = [];
+  private makeTemplatesPool = new StaticPool({
+    size: 1,
+    task: path.resolve(__dirname, './tx-selection-worker.js'),
+  });
 
   constructor() {}
 
@@ -25,6 +32,10 @@ class MempoolBlocks {
     return this.mempoolBlocks;
   }
 
+  public getMempoolBlockDeltas(): MempoolBlockDelta[] {
+    return this.mempoolBlockDeltas;
+  }
+
   public updateMempoolBlocks(memPool: { [txid: string]: TransactionExtended }): void {
     const latestMempool = memPool;
     const memPoolArray: TransactionExtended[] = [];
@@ -66,10 +77,14 @@ class MempoolBlocks {
     const time = end - start;
     logger.debug('Mempool blocks calculated in ' + time / 1000 + ' seconds');
 
-    this.mempoolBlocks = this.calculateMempoolBlocks(memPoolArray);
+    const blocks = this.calculateMempoolBlocks(memPoolArray, this.mempoolBlocks);
+    const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, blocks);
+
+    this.mempoolBlocks = blocks;
+    this.mempoolBlockDeltas = deltas;
   }
 
-  private calculateMempoolBlocks(transactionsSorted: TransactionExtended[]): MempoolBlockWithTransactions[] {
+  private calculateMempoolBlocks(transactionsSorted: TransactionExtended[], prevBlocks: MempoolBlockWithTransactions[]): MempoolBlockWithTransactions[] {
     const mempoolBlocks: MempoolBlockWithTransactions[] = [];
     let blockWeight = 0;
     let blockSize = 0;
@@ -90,9 +105,66 @@ class MempoolBlocks {
     if (transactions.length) {
       mempoolBlocks.push(this.dataToMempoolBlocks(transactions, blockSize, blockWeight, mempoolBlocks.length));
     }
+
     return mempoolBlocks;
   }
 
+  private calculateMempoolDeltas(prevBlocks: MempoolBlockWithTransactions[], mempoolBlocks: MempoolBlockWithTransactions[]): MempoolBlockDelta[] {
+    const mempoolBlockDeltas: MempoolBlockDelta[] = [];
+    for (let i = 0; i < Math.max(mempoolBlocks.length, prevBlocks.length); i++) {
+      let added: TransactionStripped[] = [];
+      let removed: string[] = [];
+      if (mempoolBlocks[i] && !prevBlocks[i]) {
+        added = mempoolBlocks[i].transactions;
+      } else if (!mempoolBlocks[i] && prevBlocks[i]) {
+        removed = prevBlocks[i].transactions.map(tx => tx.txid);
+      } else if (mempoolBlocks[i] && prevBlocks[i]) {
+        const prevIds = {};
+        const newIds = {};
+        prevBlocks[i].transactions.forEach(tx => {
+          prevIds[tx.txid] = true;
+        });
+        mempoolBlocks[i].transactions.forEach(tx => {
+          newIds[tx.txid] = true;
+        });
+        prevBlocks[i].transactions.forEach(tx => {
+          if (!newIds[tx.txid]) {
+            removed.push(tx.txid);
+          }
+        });
+        mempoolBlocks[i].transactions.forEach(tx => {
+          if (!prevIds[tx.txid]) {
+            added.push(tx);
+          }
+        });
+      }
+      mempoolBlockDeltas.push({
+        added,
+        removed
+      });
+    }
+    return mempoolBlockDeltas;
+  }
+
+  public async makeBlockTemplates(newMempool: { [txid: string]: TransactionExtended }, blockLimit: number, weightLimit: number | null = null, condenseRest = false): Promise<void> {
+    const { mempool, blocks } = await this.makeTemplatesPool.exec({ mempool: newMempool, blockLimit, weightLimit, condenseRest });
+    const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, blocks);
+
+    // copy CPFP info across to main thread's mempool
+    Object.keys(newMempool).forEach((txid) => {
+      if (newMempool[txid] && mempool[txid]) {
+        newMempool[txid].effectiveFeePerVsize = mempool[txid].effectiveFeePerVsize;
+        newMempool[txid].ancestors = mempool[txid].ancestors;
+        newMempool[txid].descendants = mempool[txid].descendants;
+        newMempool[txid].bestDescendant = mempool[txid].bestDescendant;
+        newMempool[txid].cpfpChecked = mempool[txid].cpfpChecked;
+      }
+    });
+
+    this.mempoolBlocks = blocks;
+    this.mempoolBlockDeltas = deltas;
+  }
+
   private dataToMempoolBlocks(transactions: TransactionExtended[],
     blockSize: number, blockWeight: number, blocksIndex: number): MempoolBlockWithTransactions {
     let rangeLength = 4;
@@ -112,6 +184,7 @@ class MempoolBlocks {
       medianFee: Common.percentile(transactions.map((tx) => tx.effectiveFeePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
       feeRange: Common.getFeesInRange(transactions, rangeLength),
       transactionIds: transactions.map((tx) => tx.txid),
+      transactions: transactions.map((tx) => Common.stripTransaction(tx)),
     };
   }
 }

backend/src/api/mempool.ts

@@ -8,16 +8,20 @@ import { IBitcoinApi } from './bitcoin/bitcoin-api.interface';
 import loadingIndicators from './loading-indicators';
 import bitcoinClient from './bitcoin/bitcoin-client';
 import bitcoinSecondClient from './bitcoin/bitcoin-second-client';
+import rbfCache from './rbf-cache';
 
 class Mempool {
   private static WEBSOCKET_REFRESH_RATE_MS = 10000;
   private static LAZY_DELETE_AFTER_SECONDS = 30;
   private inSync: boolean = false;
+  private mempoolCacheDelta: number = -1;
   private mempoolCache: { [txId: string]: TransactionExtended } = {};
-  private mempoolInfo: IBitcoinApi.MempoolInfo = { loaded: false, size: 0, bytes: 0, usage: 0,
+  private mempoolInfo: IBitcoinApi.MempoolInfo = { loaded: false, size: 0, bytes: 0, usage: 0, total_fee: 0,
                                                     maxmempool: 300000000, mempoolminfee: 0.00001000, minrelaytxfee: 0.00001000 };
   private mempoolChangedCallback: ((newMempool: {[txId: string]: TransactionExtended; }, newTransactions: TransactionExtended[],
     deletedTransactions: TransactionExtended[]) => void) | undefined;
+  private asyncMempoolChangedCallback: ((newMempool: {[txId: string]: TransactionExtended; }, newTransactions: TransactionExtended[],
+    deletedTransactions: TransactionExtended[]) => void) | undefined;
 
   private txPerSecondArray: number[] = [];
   private txPerSecond: number = 0;
@@ -32,6 +36,17 @@ class Mempool {
     setInterval(this.deleteExpiredTransactions.bind(this), 20000);
   }
 
+  /**
+   * Return true if we should leave resources available for mempool tx caching
+   */
+  public hasPriority(): boolean {
+    if (this.inSync) {
+      return false;
+    } else {
+      return this.mempoolCacheDelta == -1 || this.mempoolCacheDelta > 25;
+    }
+  }
+
   public isInSync(): boolean {
     return this.inSync;
   }
@@ -50,6 +65,11 @@ class Mempool {
     this.mempoolChangedCallback = fn;
   }
 
+  public setAsyncMempoolChangedCallback(fn: (newMempool: { [txId: string]: TransactionExtended; },
+    newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]) => Promise<void>) {
+    this.asyncMempoolChangedCallback = fn;
+  }
+
   public getMempool(): { [txid: string]: TransactionExtended } {
     return this.mempoolCache;
   }
@@ -59,6 +79,9 @@ class Mempool {
     if (this.mempoolChangedCallback) {
       this.mempoolChangedCallback(this.mempoolCache, [], []);
     }
+    if (this.asyncMempoolChangedCallback) {
+      this.asyncMempoolChangedCallback(this.mempoolCache, [], []);
+    }
   }
 
   public async $updateMemPoolInfo() {
@@ -90,16 +113,17 @@ class Mempool {
     return txTimes;
   }
 
-  public async $updateMempool() {
-    logger.debug('Updating mempool');
+  public async $updateMempool(): Promise<void> {
+    logger.debug(`Updating mempool...`);
     const start = new Date().getTime();
     let hasChange: boolean = false;
     const currentMempoolSize = Object.keys(this.mempoolCache).length;
-    let txCount = 0;
     const transactions = await bitcoinApi.$getRawMempool();
     const diff = transactions.length - currentMempoolSize;
     const newTransactions: TransactionExtended[] = [];
 
+    this.mempoolCacheDelta = Math.abs(diff);
+
     if (!this.inSync) {
       loadingIndicators.setProgress('mempool', Object.keys(this.mempoolCache).length / transactions.length * 100);
     }
@@ -109,7 +133,6 @@ class Mempool {
         try {
           const transaction = await transactionUtils.$getTransactionExtended(txid);
           this.mempoolCache[txid] = transaction;
-          txCount++;
           if (this.inSync) {
             this.txPerSecondArray.push(new Date().getTime());
             this.vBytesPerSecondArray.push({
@@ -118,14 +141,9 @@ class Mempool {
             });
           }
           hasChange = true;
-          if (diff > 0) {
-            logger.debug('Fetched transaction ' + txCount + ' / ' + diff);
-          } else {
-            logger.debug('Fetched transaction ' + txCount);
-          }
           newTransactions.push(transaction);
         } catch (e) {
-          logger.debug('Error finding transaction in mempool: ' + (e instanceof Error ? e.message : e));
+          logger.debug(`Error finding transaction '${txid}' in the mempool: ` + (e instanceof Error ? e.message : e));
         }
       }
 
@@ -174,14 +192,29 @@ class Mempool {
       loadingIndicators.setProgress('mempool', 100);
     }
 
+    this.mempoolCacheDelta = Math.abs(transactions.length - Object.keys(this.mempoolCache).length);
+
     if (this.mempoolChangedCallback && (hasChange || deletedTransactions.length)) {
       this.mempoolChangedCallback(this.mempoolCache, newTransactions, deletedTransactions);
     }
+    if (this.asyncMempoolChangedCallback && (hasChange || deletedTransactions.length)) {
+      await this.asyncMempoolChangedCallback(this.mempoolCache, newTransactions, deletedTransactions);
+    }
 
     const end = new Date().getTime();
     const time = end - start;
-    logger.debug(`New mempool size: ${Object.keys(this.mempoolCache).length} Change: ${diff}`);
-    logger.debug('Mempool updated in ' + time / 1000 + ' seconds');
+    logger.debug(`Mempool updated in ${time / 1000} seconds. New size: ${Object.keys(this.mempoolCache).length} (${diff > 0 ? '+' + diff : diff})`);
+  }
+
+  public handleRbfTransactions(rbfTransactions: { [txid: string]: TransactionExtended; }) {
+    for (const rbfTransaction in rbfTransactions) {
+      if (this.mempoolCache[rbfTransaction]) {
+        // Store replaced transactions
+        rbfCache.add(rbfTransaction, rbfTransactions[rbfTransaction].txid);
+        // Erase the replaced transactions from the local mempool
+        delete this.mempoolCache[rbfTransaction];
+      }
+    }
   }
 
   private updateTxPerSecond() {

backend/src/api/mining/mining-routes.ts

@@ -0,0 +1,311 @@
+import { Application, Request, Response } from 'express';
+import config from "../../config";
+import logger from '../../logger';
+import audits from '../audit';
+import BlocksAuditsRepository from '../../repositories/BlocksAuditsRepository';
+import BlocksRepository from '../../repositories/BlocksRepository';
+import DifficultyAdjustmentsRepository from '../../repositories/DifficultyAdjustmentsRepository';
+import HashratesRepository from '../../repositories/HashratesRepository';
+import bitcoinClient from '../bitcoin/bitcoin-client';
+import mining from "./mining";
+
+class MiningRoutes {
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/pools/:interval', this.$getPools)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/pool/:slug/hashrate', this.$getPoolHistoricalHashrate)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/pool/:slug/blocks', this.$getPoolBlocks)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/pool/:slug/blocks/:height', this.$getPoolBlocks)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/pool/:slug', this.$getPool)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/hashrate/pools/:interval', this.$getPoolsHistoricalHashrate)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/hashrate/:interval', this.$getHistoricalHashrate)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/difficulty-adjustments', this.$getDifficultyAdjustments)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/reward-stats/:blockCount', this.$getRewardStats)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/fees/:interval', this.$getHistoricalBlockFees)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/rewards/:interval', this.$getHistoricalBlockRewards)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/fee-rates/:interval', this.$getHistoricalBlockFeeRates)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/sizes-weights/:interval', this.$getHistoricalBlockSizeAndWeight)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/difficulty-adjustments/:interval', this.$getDifficultyAdjustments)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/predictions/:interval', this.$getHistoricalBlockPrediction)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/audit/scores', this.$getBlockAuditScores)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/audit/scores/:height', this.$getBlockAuditScores)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/audit/score/:hash', this.$getBlockAuditScore)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/audit/:hash', this.$getBlockAudit)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/timestamp/:timestamp', this.$getHeightFromTimestamp)
+    ;
+  }
+
+  private async $getPool(req: Request, res: Response): Promise<void> {
+    try {
+      const stats = await mining.$getPoolStat(req.params.slug);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(stats);
+    } catch (e) {
+      if (e instanceof Error && e.message.indexOf('This mining pool does not exist') > -1) {
+        res.status(404).send(e.message);
+      } else {
+        res.status(500).send(e instanceof Error ? e.message : e);
+      }
+    }
+  }
+
+  private async $getPoolBlocks(req: Request, res: Response) {
+    try {
+      const poolBlocks = await BlocksRepository.$getBlocksByPool(
+        req.params.slug,
+        req.params.height === undefined ? undefined : parseInt(req.params.height, 10),
+      );
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(poolBlocks);
+    } catch (e) {
+      if (e instanceof Error && e.message.indexOf('This mining pool does not exist') > -1) {
+        res.status(404).send(e.message);
+      } else {
+        res.status(500).send(e instanceof Error ? e.message : e);
+      }
+    }
+  }
+
+  private async $getPools(req: Request, res: Response) {
+    try {
+      const stats = await mining.$getPoolsStats(req.params.interval);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(stats);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getPoolsHistoricalHashrate(req: Request, res: Response) {
+    try {
+      const hashrates = await HashratesRepository.$getPoolsWeeklyHashrate(req.params.interval);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      res.json(hashrates);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getPoolHistoricalHashrate(req: Request, res: Response) {
+    try {
+      const hashrates = await HashratesRepository.$getPoolWeeklyHashrate(req.params.slug);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      res.json(hashrates);
+    } catch (e) {
+      if (e instanceof Error && e.message.indexOf('This mining pool does not exist') > -1) {
+        res.status(404).send(e.message);
+      } else {
+        res.status(500).send(e instanceof Error ? e.message : e);
+      }
+    }
+  }
+
+  private async $getHistoricalHashrate(req: Request, res: Response) {
+    let currentHashrate = 0, currentDifficulty = 0;
+    try {
+      currentHashrate = await bitcoinClient.getNetworkHashPs();
+      currentDifficulty = await bitcoinClient.getDifficulty();
+    } catch (e) {
+      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate and difficulty');
+    }
+
+    try {
+      const hashrates = await HashratesRepository.$getNetworkDailyHashrate(req.params.interval);
+      const difficulty = await DifficultyAdjustmentsRepository.$getAdjustments(req.params.interval, false);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      res.json({
+        hashrates: hashrates,
+        difficulty: difficulty,
+        currentHashrate: currentHashrate,
+        currentDifficulty: currentDifficulty,
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getHistoricalBlockFees(req: Request, res: Response) {
+    try {
+      const blockFees = await mining.$getHistoricalBlockFees(req.params.interval);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(blockFees);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getHistoricalBlockRewards(req: Request, res: Response) {
+    try {
+      const blockRewards = await mining.$getHistoricalBlockRewards(req.params.interval);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(blockRewards);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getHistoricalBlockFeeRates(req: Request, res: Response) {
+    try {
+      const blockFeeRates = await mining.$getHistoricalBlockFeeRates(req.params.interval);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(blockFeeRates);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getHistoricalBlockSizeAndWeight(req: Request, res: Response) {
+    try {
+      const blockSizes = await mining.$getHistoricalBlockSizes(req.params.interval);
+      const blockWeights = await mining.$getHistoricalBlockWeights(req.params.interval);
+      const blockCount = await BlocksRepository.$blockCount(null, null);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json({
+        sizes: blockSizes,
+        weights: blockWeights
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getDifficultyAdjustments(req: Request, res: Response) {
+    try {
+      const difficulty = await DifficultyAdjustmentsRepository.$getRawAdjustments(req.params.interval, true);
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      res.json(difficulty.map(adj => [adj.time, adj.height, adj.difficulty, adj.adjustment]));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getRewardStats(req: Request, res: Response) {
+    try {
+      const response = await mining.$getRewardStats(parseInt(req.params.blockCount, 10));
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(response);
+    } catch (e) {
+      res.status(500).end();
+    }
+  }
+
+  private async $getHistoricalBlockPrediction(req: Request, res: Response) {
+    try {
+      const blockPredictions = await mining.$getBlockPredictionsHistory(req.params.interval);
+      const blockCount = await BlocksAuditsRepository.$getPredictionsCount();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.header('X-total-count', blockCount.toString());
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(blockPredictions.map(prediction => [prediction.time, prediction.height, prediction.match_rate]));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  public async $getBlockAudit(req: Request, res: Response) {
+    try {
+      const audit = await BlocksAuditsRepository.$getBlockAudit(req.params.hash);
+
+      if (!audit) {
+        res.status(404).send(`This block has not been audited.`);
+        return;
+      }
+
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24).toUTCString());
+      res.json(audit);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getHeightFromTimestamp(req: Request, res: Response) {
+    try {
+      const timestamp = parseInt(req.params.timestamp, 10);
+      // This will prevent people from entering milliseconds etc.
+      // Block timestamps are allowed to be up to 2 hours off, so 24 hours
+      // will never put the maximum value before the most recent block
+      const nowPlus1day = Math.floor(Date.now() / 1000) + 60 * 60 * 24;
+      // Prevent non-integers that are not seconds
+      if (!/^[1-9][0-9]*$/.test(req.params.timestamp) || timestamp > nowPlus1day) {
+        throw new Error(`Invalid timestamp, value must be Unix seconds`);
+      }
+      const result = await BlocksRepository.$getBlockHeightFromTimestamp(
+        timestamp,
+      );
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async $getBlockAuditScores(req: Request, res: Response) {
+    try {
+      let height = req.params.height === undefined ? undefined : parseInt(req.params.height, 10);
+      if (height == null) {
+        height = await BlocksRepository.$mostRecentBlockHeight();
+      }
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(await BlocksAuditsRepository.$getBlockAuditScores(height, height - 15));
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  public async $getBlockAuditScore(req: Request, res: Response) {
+    try {
+      const audit = await BlocksAuditsRepository.$getBlockAuditScore(req.params.hash);
+
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24).toUTCString());
+      res.json(audit || 'null');
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+}
+
+export default new MiningRoutes();

backend/src/api/mining/mining.ts

@@ -0,0 +1,547 @@
+import { BlockPrice, PoolInfo, PoolStats, RewardStats } from '../../mempool.interfaces';
+import BlocksRepository from '../../repositories/BlocksRepository';
+import PoolsRepository from '../../repositories/PoolsRepository';
+import HashratesRepository from '../../repositories/HashratesRepository';
+import bitcoinClient from '../bitcoin/bitcoin-client';
+import logger from '../../logger';
+import { Common } from '../common';
+import loadingIndicators from '../loading-indicators';
+import { escape } from 'mysql2';
+import DifficultyAdjustmentsRepository from '../../repositories/DifficultyAdjustmentsRepository';
+import config from '../../config';
+import BlocksAuditsRepository from '../../repositories/BlocksAuditsRepository';
+import PricesRepository from '../../repositories/PricesRepository';
+
+class Mining {
+  blocksPriceIndexingRunning = false;
+
+  constructor() {
+  }
+
+  /**
+   * Get historical block predictions match rate
+   */
+   public async $getBlockPredictionsHistory(interval: string | null = null): Promise<any> {
+    return await BlocksAuditsRepository.$getBlockPredictionsHistory(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Get historical block total fee
+   */
+  public async $getHistoricalBlockFees(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockFees(
+      this.getTimeRange(interval, 5),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Get historical block rewards
+   */
+  public async $getHistoricalBlockRewards(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockRewards(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Get historical block fee rates percentiles
+   */
+   public async $getHistoricalBlockFeeRates(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockFeeRates(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Get historical block sizes
+   */
+   public async $getHistoricalBlockSizes(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockSizes(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Get historical block weights
+   */
+   public async $getHistoricalBlockWeights(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockWeights(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Generate high level overview of the pool ranks and general stats
+   */
+  public async $getPoolsStats(interval: string | null): Promise<object> {
+    const poolsStatistics = {};
+
+    const poolsInfo: PoolInfo[] = await PoolsRepository.$getPoolsInfo(interval);
+    const emptyBlocks: any[] = await BlocksRepository.$countEmptyBlocks(null, interval);
+
+    const poolsStats: PoolStats[] = [];
+    let rank = 1;
+
+    poolsInfo.forEach((poolInfo: PoolInfo) => {
+      const emptyBlocksCount = emptyBlocks.filter((emptyCount) => emptyCount.poolId === poolInfo.poolId);
+      const poolStat: PoolStats = {
+        poolId: poolInfo.poolId, // mysql row id
+        name: poolInfo.name,
+        link: poolInfo.link,
+        blockCount: poolInfo.blockCount,
+        rank: rank++,
+        emptyBlocks: emptyBlocksCount.length > 0 ? emptyBlocksCount[0]['count'] : 0,
+        slug: poolInfo.slug,
+      };
+      poolsStats.push(poolStat);
+    });
+
+    poolsStatistics['pools'] = poolsStats;
+
+    const blockCount: number = await BlocksRepository.$blockCount(null, interval);
+    poolsStatistics['blockCount'] = blockCount;
+
+    const totalBlock24h: number = await BlocksRepository.$blockCount(null, '24h');
+
+    try {
+      poolsStatistics['lastEstimatedHashrate'] = await bitcoinClient.getNetworkHashPs(totalBlock24h);
+    } catch (e) {
+      poolsStatistics['lastEstimatedHashrate'] = 0;
+      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate');
+    }
+
+    return poolsStatistics;
+  }
+
+  /**
+   * Get all mining pool stats for a pool
+   */
+  public async $getPoolStat(slug: string): Promise<object> {
+    const pool = await PoolsRepository.$getPool(slug);
+    if (!pool) {
+      throw new Error('This mining pool does not exist ' + escape(slug));
+    }
+
+    const blockCount: number = await BlocksRepository.$blockCount(pool.id);
+    const totalBlock: number = await BlocksRepository.$blockCount(null, null);
+
+    const blockCount24h: number = await BlocksRepository.$blockCount(pool.id, '24h');
+    const totalBlock24h: number = await BlocksRepository.$blockCount(null, '24h');
+
+    const blockCount1w: number = await BlocksRepository.$blockCount(pool.id, '1w');
+    const totalBlock1w: number = await BlocksRepository.$blockCount(null, '1w');
+
+    let currentEstimatedHashrate = 0;
+    try {
+      currentEstimatedHashrate = await bitcoinClient.getNetworkHashPs(totalBlock24h);
+    } catch (e) {
+      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate');
+    }
+
+    return {
+      pool: pool,
+      blockCount: {
+        'all': blockCount,
+        '24h': blockCount24h,
+        '1w': blockCount1w,
+      },
+      blockShare: {
+        'all': blockCount / totalBlock,
+        '24h': blockCount24h / totalBlock24h,
+        '1w': blockCount1w / totalBlock1w,
+      },
+      estimatedHashrate: currentEstimatedHashrate * (blockCount24h / totalBlock24h),
+      reportedHashrate: null,
+    };
+  }
+
+  /**
+   * Get miner reward stats
+   */
+  public async $getRewardStats(blockCount: number): Promise<RewardStats> {
+    return await BlocksRepository.$getBlockStats(blockCount);
+  }
+
+  /**
+   * [INDEXING] Generate weekly mining pool hashrate history
+   */
+  public async $generatePoolHashrateHistory(): Promise<void> {
+    const now = new Date();
+    const lastestRunDate = await HashratesRepository.$getLatestRun('last_weekly_hashrates_indexing');
+
+    // Run only if:
+    // * lastestRunDate is set to 0 (node backend restart, reorg)
+    // * we started a new week (around Monday midnight)
+    const runIndexing = lastestRunDate === 0 || now.getUTCDay() === 1 && lastestRunDate !== now.getUTCDate();
+    if (!runIndexing) {
+      return;
+    }
+
+    try {
+      const oldestConsecutiveBlockTimestamp = 1000 * (await BlocksRepository.$getOldestConsecutiveBlock()).timestamp;
+
+      const genesisBlock = await bitcoinClient.getBlock(await bitcoinClient.getBlockHash(0));
+      const genesisTimestamp = genesisBlock.time * 1000;
+
+      const indexedTimestamp = await HashratesRepository.$getWeeklyHashrateTimestamps();
+      const hashrates: any[] = [];
+ 
+      const lastMonday = new Date(now.setDate(now.getDate() - (now.getDay() + 6) % 7));
+      const lastMondayMidnight = this.getDateMidnight(lastMonday);
+      let toTimestamp = lastMondayMidnight.getTime();
+
+      const totalWeekIndexed = (await BlocksRepository.$blockCount(null, null)) / 1008;
+      let indexedThisRun = 0;
+      let totalIndexed = 0;
+      let newlyIndexed = 0;
+      const startedAt = new Date().getTime() / 1000;
+      let timer = new Date().getTime() / 1000;
+
+      logger.debug(`Indexing weekly mining pool hashrate`);
+      loadingIndicators.setProgress('weekly-hashrate-indexing', 0);
+
+      while (toTimestamp > genesisTimestamp && toTimestamp > oldestConsecutiveBlockTimestamp) {
+        const fromTimestamp = toTimestamp - 604800000;
+
+        // Skip already indexed weeks
+        if (indexedTimestamp.includes(toTimestamp / 1000)) {
+          toTimestamp -= 604800000;
+          ++totalIndexed;
+          continue;
+        }
+
+        const blockStats: any = await BlocksRepository.$blockCountBetweenTimestamp(
+          null, fromTimestamp / 1000, toTimestamp / 1000);
+        const lastBlockHashrate = await bitcoinClient.getNetworkHashPs(blockStats.blockCount,
+          blockStats.lastBlockHeight);
+
+        let pools = await PoolsRepository.$getPoolsInfoBetween(fromTimestamp / 1000, toTimestamp / 1000);
+        const totalBlocks = pools.reduce((acc, pool) => acc + pool.blockCount, 0);
+        if (totalBlocks > 0) {
+          pools = pools.map((pool: any) => {
+            pool.hashrate = (pool.blockCount / totalBlocks) * lastBlockHashrate;
+            pool.share = (pool.blockCount / totalBlocks);
+            return pool;
+          });
+
+          for (const pool of pools) {
+            hashrates.push({
+              hashrateTimestamp: toTimestamp / 1000,
+              avgHashrate: pool['hashrate'] ,
+              poolId: pool.poolId,
+              share: pool['share'],
+              type: 'weekly',
+            });
+          }
+
+          newlyIndexed += hashrates.length;
+          await HashratesRepository.$saveHashrates(hashrates);
+          hashrates.length = 0;
+        }
+
+        const elapsedSeconds = Math.max(1, Math.round((new Date().getTime() / 1000) - timer));
+        if (elapsedSeconds > 1) {
+          const runningFor = Math.max(1, Math.round((new Date().getTime() / 1000) - startedAt));
+          const weeksPerSeconds = Math.max(1, Math.round(indexedThisRun / elapsedSeconds));
+          const progress = Math.round(totalIndexed / totalWeekIndexed * 10000) / 100;
+          const formattedDate = new Date(fromTimestamp).toUTCString();
+          logger.debug(`Getting weekly pool hashrate for ${formattedDate} | ~${weeksPerSeconds.toFixed(2)} weeks/sec | total: ~${totalIndexed}/${Math.round(totalWeekIndexed)} (${progress}%) | elapsed: ${runningFor} seconds`);
+          timer = new Date().getTime() / 1000;
+          indexedThisRun = 0;
+          loadingIndicators.setProgress('weekly-hashrate-indexing', progress, false);
+        }
+
+        toTimestamp -= 604800000;
+        ++indexedThisRun;
+        ++totalIndexed;
+      }
+      await HashratesRepository.$setLatestRun('last_weekly_hashrates_indexing', new Date().getUTCDate());
+      if (newlyIndexed > 0) {
+        logger.notice(`Weekly mining pools hashrates indexing completed: indexed ${newlyIndexed}`);
+      } else {
+        logger.debug(`Weekly mining pools hashrates indexing completed: indexed ${newlyIndexed}`);
+      }
+      loadingIndicators.setProgress('weekly-hashrate-indexing', 100);
+    } catch (e) {
+      loadingIndicators.setProgress('weekly-hashrate-indexing', 100);
+      logger.err(`Weekly mining pools hashrates indexing failed. Trying again in 10 seconds. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
+  /**
+   * [INDEXING] Generate daily hashrate data
+   */
+  public async $generateNetworkHashrateHistory(): Promise<void> {
+    // We only run this once a day around midnight
+    const latestRunDate = await HashratesRepository.$getLatestRun('last_hashrates_indexing');
+    const now = new Date().getUTCDate();
+    if (now === latestRunDate) {
+      return;
+    }
+
+    const oldestConsecutiveBlockTimestamp = 1000 * (await BlocksRepository.$getOldestConsecutiveBlock()).timestamp;
+
+    try {
+      const genesisBlock = await bitcoinClient.getBlock(await bitcoinClient.getBlockHash(0));
+      const genesisTimestamp = genesisBlock.time * 1000;
+      const indexedTimestamp = (await HashratesRepository.$getRawNetworkDailyHashrate(null)).map(hashrate => hashrate.timestamp);
+      const lastMidnight = this.getDateMidnight(new Date());
+      let toTimestamp = Math.round(lastMidnight.getTime());
+      const hashrates: any[] = [];
+
+      const totalDayIndexed = (await BlocksRepository.$blockCount(null, null)) / 144;
+      let indexedThisRun = 0;
+      let totalIndexed = 0;
+      let newlyIndexed = 0;
+      const startedAt = new Date().getTime() / 1000;
+      let timer = new Date().getTime() / 1000;
+
+      logger.debug(`Indexing daily network hashrate`);
+      loadingIndicators.setProgress('daily-hashrate-indexing', 0);
+
+      while (toTimestamp > genesisTimestamp && toTimestamp > oldestConsecutiveBlockTimestamp) {
+        const fromTimestamp = toTimestamp - 86400000;
+
+        // Skip already indexed days
+        if (indexedTimestamp.includes(toTimestamp / 1000)) {
+          toTimestamp -= 86400000;
+          ++totalIndexed;
+          continue;
+        }
+
+        const blockStats: any = await BlocksRepository.$blockCountBetweenTimestamp(
+          null, fromTimestamp / 1000, toTimestamp / 1000);
+        const lastBlockHashrate = blockStats.blockCount === 0 ? 0 : await bitcoinClient.getNetworkHashPs(blockStats.blockCount,
+          blockStats.lastBlockHeight);
+
+        hashrates.push({
+          hashrateTimestamp: toTimestamp / 1000,
+          avgHashrate: lastBlockHashrate,
+          poolId: 0,
+          share: 1,
+          type: 'daily',
+        });
+
+        if (hashrates.length > 10) {
+          newlyIndexed += hashrates.length;
+          await HashratesRepository.$saveHashrates(hashrates);
+          hashrates.length = 0;
+        }
+
+        const elapsedSeconds = Math.max(1, Math.round((new Date().getTime() / 1000) - timer));
+        if (elapsedSeconds > 1) {
+          const runningFor = Math.max(1, Math.round((new Date().getTime() / 1000) - startedAt));
+          const daysPerSeconds = Math.max(1, Math.round(indexedThisRun / elapsedSeconds));
+          const progress = Math.round(totalIndexed / totalDayIndexed * 10000) / 100;
+          const formattedDate = new Date(fromTimestamp).toUTCString();
+          logger.debug(`Getting network daily hashrate for ${formattedDate} | ~${daysPerSeconds.toFixed(2)} days/sec | total: ~${totalIndexed}/${Math.round(totalDayIndexed)} (${progress}%) | elapsed: ${runningFor} seconds`);
+          timer = new Date().getTime() / 1000;
+          indexedThisRun = 0;
+          loadingIndicators.setProgress('daily-hashrate-indexing', progress);
+        }
+
+        toTimestamp -= 86400000;
+        ++indexedThisRun;
+        ++totalIndexed;
+      }
+
+      // Add genesis block manually
+      if (config.MEMPOOL.INDEXING_BLOCKS_AMOUNT === -1 && !indexedTimestamp.includes(genesisTimestamp / 1000)) {
+        hashrates.push({
+          hashrateTimestamp: genesisTimestamp / 1000,
+          avgHashrate: await bitcoinClient.getNetworkHashPs(1, 1),
+          poolId: 0,
+          share: 1,
+          type: 'daily',
+        });
+      }
+
+      newlyIndexed += hashrates.length;
+      await HashratesRepository.$saveHashrates(hashrates);
+
+      await HashratesRepository.$setLatestRun('last_hashrates_indexing', new Date().getUTCDate());
+      if (newlyIndexed > 0) {
+        logger.notice(`Daily network hashrate indexing completed: indexed ${newlyIndexed} days`);
+      } else {
+        logger.debug(`Daily network hashrate indexing completed: indexed ${newlyIndexed} days`);
+      }
+      loadingIndicators.setProgress('daily-hashrate-indexing', 100);
+    } catch (e) {
+      loadingIndicators.setProgress('daily-hashrate-indexing', 100);
+      logger.err(`Daily network hashrate indexing failed. Trying again in 10 seconds. Reason: ${(e instanceof Error ? e.message : e)}`);
+      throw e;
+    }
+  }
+
+  /**
+   * Index difficulty adjustments
+   */
+  public async $indexDifficultyAdjustments(): Promise<void> {
+    const indexedHeightsArray = await DifficultyAdjustmentsRepository.$getAdjustmentsHeights();
+    const indexedHeights = {};
+    for (const height of indexedHeightsArray) {
+      indexedHeights[height] = true;
+    }
+
+    const blocks: any = await BlocksRepository.$getBlocksDifficulty();
+    const genesisBlock = await bitcoinClient.getBlock(await bitcoinClient.getBlockHash(0));
+    let currentDifficulty = genesisBlock.difficulty;
+    let totalIndexed = 0;
+
+    if (config.MEMPOOL.INDEXING_BLOCKS_AMOUNT === -1 && indexedHeights[0] !== true) {
+      await DifficultyAdjustmentsRepository.$saveAdjustments({
+        time: genesisBlock.time,
+        height: 0,
+        difficulty: currentDifficulty,
+        adjustment: 0.0,
+      });
+    }
+
+    const oldestConsecutiveBlock = await BlocksRepository.$getOldestConsecutiveBlock();
+    if (config.MEMPOOL.INDEXING_BLOCKS_AMOUNT !== -1) {
+      currentDifficulty = oldestConsecutiveBlock.difficulty;
+    }
+
+    let totalBlockChecked = 0;
+    let timer = new Date().getTime() / 1000;
+
+    for (const block of blocks) {
+      if (block.difficulty !== currentDifficulty) {
+        if (indexedHeights[block.height] === true) { // Already indexed
+          if (block.height >= oldestConsecutiveBlock.height) {
+            currentDifficulty = block.difficulty;
+          }
+          continue;          
+        }
+
+        let adjustment = block.difficulty / currentDifficulty;
+        adjustment = Math.round(adjustment * 1000000) / 1000000; // Remove float point noise
+
+        await DifficultyAdjustmentsRepository.$saveAdjustments({
+          time: block.time,
+          height: block.height,
+          difficulty: block.difficulty,
+          adjustment: adjustment,
+        });
+
+        totalIndexed++;
+        if (block.height >= oldestConsecutiveBlock.height) {
+          currentDifficulty = block.difficulty;
+        }
+    }
+
+      totalBlockChecked++;
+      const elapsedSeconds = Math.max(1, Math.round((new Date().getTime() / 1000) - timer));
+      if (elapsedSeconds > 5) {
+        const progress = Math.round(totalBlockChecked / blocks.length * 100);
+        logger.info(`Indexing difficulty adjustment at block #${block.height} | Progress: ${progress}%`);
+        timer = new Date().getTime() / 1000;
+      }
+    }
+
+    if (totalIndexed > 0) {
+      logger.notice(`Indexed ${totalIndexed} difficulty adjustments`);
+    } else {
+      logger.debug(`Indexed ${totalIndexed} difficulty adjustments`);
+    }
+  }
+
+  /**
+   * Create a link between blocks and the latest price at when they were mined
+   */
+  public async $indexBlockPrices() {
+    if (this.blocksPriceIndexingRunning === true) {
+      return;
+    }
+    this.blocksPriceIndexingRunning = true;
+
+    try {
+      const prices: any[] = await PricesRepository.$getPricesTimesAndId();    
+      const blocksWithoutPrices: any[] = await BlocksRepository.$getBlocksWithoutPrice();
+
+      let totalInserted = 0;
+      const blocksPrices: BlockPrice[] = [];
+
+      for (const block of blocksWithoutPrices) {
+        // Quick optimisation, out mtgox feed only goes back to 2010-07-19 02:00:00, so skip the first 68951 blocks
+        if (['mainnet', 'testnet'].includes(config.MEMPOOL.NETWORK) && block.height < 68951) {
+          blocksPrices.push({
+            height: block.height,
+            priceId: prices[0].id,
+          });
+          continue;
+        }
+        for (const price of prices) {
+          if (block.timestamp < price.time) {
+            blocksPrices.push({
+              height: block.height,
+              priceId: price.id,
+            });
+            break;
+          };
+        }
+
+        if (blocksPrices.length >= 100000) {
+          totalInserted += blocksPrices.length;
+          let logStr = `Linking ${blocksPrices.length} blocks to their closest price`;
+          if (blocksWithoutPrices.length > 200000) {
+            logStr += ` | Progress ${Math.round(totalInserted / blocksWithoutPrices.length * 100)}%`;
+          }
+          logger.debug(logStr);
+          await BlocksRepository.$saveBlockPrices(blocksPrices);
+          blocksPrices.length = 0;
+        }
+      }
+
+      if (blocksPrices.length > 0) {
+        totalInserted += blocksPrices.length;
+        let logStr = `Linking ${blocksPrices.length} blocks to their closest price`;
+        if (blocksWithoutPrices.length > 200000) {
+          logStr += ` | Progress ${Math.round(totalInserted / blocksWithoutPrices.length * 100)}%`;
+        }
+        logger.debug(logStr);
+        await BlocksRepository.$saveBlockPrices(blocksPrices);
+      }
+    } catch (e) {
+      this.blocksPriceIndexingRunning = false;
+      throw e;
+    }
+
+    this.blocksPriceIndexingRunning = false;
+  }
+
+  private getDateMidnight(date: Date): Date {
+    date.setUTCHours(0);
+    date.setUTCMinutes(0);
+    date.setUTCSeconds(0);
+    date.setUTCMilliseconds(0);
+
+    return date;
+  }
+
+  private getTimeRange(interval: string | null, scale = 1): number {
+    switch (interval) {
+      case '3y': return 43200 * scale; // 12h
+      case '2y': return 28800 * scale; // 8h
+      case '1y': return 28800 * scale; // 8h
+      case '6m': return 10800 * scale; // 3h
+      case '3m': return 7200 * scale; // 2h
+      case '1m': return 1800 * scale; // 30min
+      case '1w': return 300 * scale; // 5min
+      case '3d': return 1 * scale;
+      case '24h': return 1 * scale;
+      default: return 86400 * scale;
+    }
+  }
+}
+
+export default new Mining();

backend/src/api/pools-parser.ts

@@ -0,0 +1,290 @@
+import DB from '../database';
+import logger from '../logger';
+import config from '../config';
+import BlocksRepository from '../repositories/BlocksRepository';
+
+interface Pool {
+  name: string;
+  link: string;
+  regexes: string[];
+  addresses: string[];
+  slug: string;
+}
+
+class PoolsParser {
+  miningPools: any[] = [];
+  unknownPool: any = {
+    'name': 'Unknown',
+    'link': 'https://learnmeabitcoin.com/technical/coinbase-transaction',
+    'regexes': '[]',
+    'addresses': '[]',
+    'slug': 'unknown'
+  };
+  slugWarnFlag = false;
+
+  /**
+   * Parse the pools.json file, consolidate the data and dump it into the database
+   */
+  public async migratePoolsJson(poolsJson: object): Promise<void> {
+    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) === false) {
+      return;
+    }
+
+    // First we save every entries without paying attention to pool duplication
+    const poolsDuplicated: Pool[] = [];
+
+    const coinbaseTags = Object.entries(poolsJson['coinbase_tags']);
+    for (let i = 0; i < coinbaseTags.length; ++i) {
+      poolsDuplicated.push({
+        'name': (<Pool>coinbaseTags[i][1]).name,
+        'link': (<Pool>coinbaseTags[i][1]).link,
+        'regexes': [coinbaseTags[i][0]],
+        'addresses': [],
+        'slug': ''
+      });
+    }
+    const addressesTags = Object.entries(poolsJson['payout_addresses']);
+    for (let i = 0; i < addressesTags.length; ++i) {
+      poolsDuplicated.push({
+        'name': (<Pool>addressesTags[i][1]).name,
+        'link': (<Pool>addressesTags[i][1]).link,
+        'regexes': [],
+        'addresses': [addressesTags[i][0]],
+        'slug': ''
+      });
+    }
+
+    // Then, we find unique mining pool names
+    const poolNames: string[] = [];
+    for (let i = 0; i < poolsDuplicated.length; ++i) {
+      if (poolNames.indexOf(poolsDuplicated[i].name) === -1) {
+        poolNames.push(poolsDuplicated[i].name);
+      }
+    }
+    logger.debug(`Found ${poolNames.length} unique mining pools`);
+
+    // Get existing pools from the db
+    let existingPools;
+    try {
+      if (config.DATABASE.ENABLED === true) {
+        [existingPools] = await DB.query({ sql: 'SELECT * FROM pools;', timeout: 120000 });
+      } else {
+        existingPools = [];
+      }
+    } catch (e) {
+      logger.err('Cannot get existing pools from the database, skipping pools.json import');
+      return;
+    }
+
+    this.miningPools = [];
+
+    // Finally, we generate the final consolidated pools data
+    const finalPoolDataAdd: Pool[] = [];
+    const finalPoolDataUpdate: Pool[] = [];
+    const finalPoolDataRename: Pool[] = [];
+    for (let i = 0; i < poolNames.length; ++i) {
+      let allAddresses: string[] = [];
+      let allRegexes: string[] = [];
+      const match = poolsDuplicated.filter((pool: Pool) => pool.name === poolNames[i]);
+
+      for (let y = 0; y < match.length; ++y) {
+        allAddresses = allAddresses.concat(match[y].addresses);
+        allRegexes = allRegexes.concat(match[y].regexes);
+      }
+
+      const finalPoolName = poolNames[i].replace(`'`, `''`); // To support single quote in names when doing db queries
+
+      let slug: string | undefined;
+      try {
+        slug = poolsJson['slugs'][poolNames[i]];
+      } catch (e) {
+        if (this.slugWarnFlag === false) {
+          logger.warn(`pools.json does not seem to contain the 'slugs' object`);
+          this.slugWarnFlag = true;
+        }
+      }
+
+      if (slug === undefined) {
+        // Only keep alphanumerical
+        slug = poolNames[i].replace(/[^a-z0-9]/gi, '').toLowerCase();
+        logger.warn(`No slug found for '${poolNames[i]}', generating it => '${slug}'`);
+      }
+
+      const poolObj = {
+        'name': finalPoolName,
+        'link': match[0].link,
+        'regexes': allRegexes,
+        'addresses': allAddresses,
+        'slug': slug
+      };
+
+      const existingPool = existingPools.find((pool) => pool.name === poolNames[i]);
+      if (existingPool !== undefined) {
+        // Check if any data was actually updated
+        const equals = (a, b) =>
+          a.length === b.length &&
+          a.every((v, i) => v === b[i]);
+        if (!equals(JSON.parse(existingPool.addresses), poolObj.addresses) || !equals(JSON.parse(existingPool.regexes), poolObj.regexes)) {
+          finalPoolDataUpdate.push(poolObj);
+        }
+      } else {
+        // Double check that if we're not just renaming a pool (same address same regex)
+        const [poolToRename]: any[] = await DB.query(`
+          SELECT * FROM pools
+          WHERE addresses = ? OR regexes = ?`,
+          [JSON.stringify(poolObj.addresses), JSON.stringify(poolObj.regexes)]
+        );
+        if (poolToRename && poolToRename.length > 0) {
+          // We're actually renaming an existing pool
+          finalPoolDataRename.push({
+            'name': poolObj.name,
+            'link': poolObj.link,
+            'regexes': allRegexes,
+            'addresses': allAddresses,
+            'slug': slug
+          });
+          logger.debug(`Rename '${poolToRename[0].name}' mining pool to ${poolObj.name}`);
+        } else {
+          logger.debug(`Add '${finalPoolName}' mining pool`);
+          finalPoolDataAdd.push(poolObj);
+        }
+      }
+
+      this.miningPools.push({
+        'name': finalPoolName,
+        'link': match[0].link,
+        'regexes': JSON.stringify(allRegexes),
+        'addresses': JSON.stringify(allAddresses),
+        'slug': slug
+      });
+    }
+
+    if (config.DATABASE.ENABLED === false) { // Don't run db operations
+      logger.info('Mining pools.json import completed (no database)');
+      return;
+    }
+
+    if (finalPoolDataAdd.length > 0 || finalPoolDataUpdate.length > 0 ||
+      finalPoolDataRename.length > 0
+    ) {    
+      logger.debug(`Update pools table now`);
+
+      // Add new mining pools into the database
+      let queryAdd: string = 'INSERT INTO pools(name, link, regexes, addresses, slug) VALUES ';
+      for (let i = 0; i < finalPoolDataAdd.length; ++i) {
+        queryAdd += `('${finalPoolDataAdd[i].name}', '${finalPoolDataAdd[i].link}',
+        '${JSON.stringify(finalPoolDataAdd[i].regexes)}', '${JSON.stringify(finalPoolDataAdd[i].addresses)}',
+        ${JSON.stringify(finalPoolDataAdd[i].slug)}),`;
+      }
+      queryAdd = queryAdd.slice(0, -1) + ';';
+
+      // Updated existing mining pools in the database
+      const updateQueries: string[] = [];
+      for (let i = 0; i < finalPoolDataUpdate.length; ++i) {
+        updateQueries.push(`
+          UPDATE pools
+          SET name='${finalPoolDataUpdate[i].name}', link='${finalPoolDataUpdate[i].link}',
+          regexes='${JSON.stringify(finalPoolDataUpdate[i].regexes)}', addresses='${JSON.stringify(finalPoolDataUpdate[i].addresses)}',
+          slug='${finalPoolDataUpdate[i].slug}'
+          WHERE name='${finalPoolDataUpdate[i].name}'
+        ;`);
+      }
+
+      // Rename mining pools
+      const renameQueries: string[] = [];
+      for (let i = 0; i < finalPoolDataRename.length; ++i) {
+        renameQueries.push(`
+          UPDATE pools
+          SET name='${finalPoolDataRename[i].name}', link='${finalPoolDataRename[i].link}',
+            slug='${finalPoolDataRename[i].slug}'
+          WHERE regexes='${JSON.stringify(finalPoolDataRename[i].regexes)}'
+            AND addresses='${JSON.stringify(finalPoolDataRename[i].addresses)}'
+        ;`);
+      }
+
+      try {
+        if (finalPoolDataAdd.length > 0 || updateQueries.length > 0) {
+          await this.$deleteBlocskToReindex(finalPoolDataUpdate);
+        }
+
+        if (finalPoolDataAdd.length > 0) {
+          await DB.query({ sql: queryAdd, timeout: 120000 });
+        }
+        for (const query of updateQueries) {
+          await DB.query({ sql: query, timeout: 120000 });
+        }
+        for (const query of renameQueries) {
+          await DB.query({ sql: query, timeout: 120000 });
+        }
+        await this.insertUnknownPool();
+        logger.info('Mining pools.json import completed');
+      } catch (e) {
+        logger.err(`Cannot import pools in the database`);
+        throw e;
+      }
+    }
+
+    try {
+      await this.insertUnknownPool();
+    } catch (e) {
+      logger.err(`Cannot insert unknown pool in the database`);
+      throw e;
+    }
+  }
+
+  /**
+   * Manually add the 'unknown pool'
+   */
+  private async insertUnknownPool() {
+    try {
+      const [rows]: any[] = await DB.query({ sql: 'SELECT name from pools where name="Unknown"', timeout: 120000 });
+      if (rows.length === 0) {
+        await DB.query({
+          sql: `INSERT INTO pools(name, link, regexes, addresses, slug)
+          VALUES("Unknown", "https://learnmeabitcoin.com/technical/coinbase-transaction", "[]", "[]", "unknown");
+        `});
+      } else {
+        await DB.query(`UPDATE pools
+          SET name='Unknown', link='https://learnmeabitcoin.com/technical/coinbase-transaction',
+          regexes='[]', addresses='[]',
+          slug='unknown'
+          WHERE name='Unknown'
+        `);
+      }
+    } catch (e) {
+      logger.err('Unable to insert "Unknown" mining pool');
+    }
+  }
+
+  /**
+   * Delete blocks which needs to be reindexed
+   */
+   private async $deleteBlocskToReindex(finalPoolDataUpdate: any[]) {
+    if (config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING === false) {
+      return;
+    }
+
+    const blockCount = await BlocksRepository.$blockCount(null, null);
+    if (blockCount === 0) {
+      return;
+    }
+
+    for (const updatedPool of finalPoolDataUpdate) {
+      const [pool]: any[] = await DB.query(`SELECT id, name from pools where slug = "${updatedPool.slug}"`);
+      if (pool.length > 0) {
+        logger.notice(`Deleting blocks from ${pool[0].name} mining pool for future re-indexing`);
+        await DB.query(`DELETE FROM blocks WHERE pool_id = ${pool[0].id}`);
+      }
+    }
+
+    // Ignore early days of Bitcoin as there were not mining pool yet
+    logger.notice('Deleting blocks with unknown mining pool from height 130635 for future re-indexing');
+    const [unknownPool] = await DB.query(`SELECT id from pools where slug = "unknown"`);
+    await DB.query(`DELETE FROM blocks WHERE pool_id = ${unknownPool[0].id} AND height > 130635`);
+
+    logger.notice('Truncating hashrates for future re-indexing');
+    await DB.query(`DELETE FROM hashrates`);
+  }
+}
+
+export default new PoolsParser();

backend/src/api/rbf-cache.ts

@@ -0,0 +1,34 @@
+export interface CachedRbf {
+  txid: string;
+  expires: Date;
+}
+
+class RbfCache {
+  private cache: { [txid: string]: CachedRbf; } = {};
+
+  constructor() {
+    setInterval(this.cleanup.bind(this), 1000 * 60 * 60);
+  }
+
+  public add(replacedTxId: string, newTxId: string): void {
+    this.cache[replacedTxId] = {
+      expires: new Date(Date.now() + 1000 * 604800), // 1 week
+      txid: newTxId,
+    };
+  }
+
+  public get(txId: string): CachedRbf | undefined {
+    return this.cache[txId];
+  }
+
+  private cleanup(): void {
+    const currentDate = new Date();
+    for (const c in this.cache) {
+      if (this.cache[c].expires < currentDate) {
+        delete this.cache[c];
+      }
+    }
+  }
+}
+
+export default new RbfCache();

backend/src/api/statistics.ts

@@ -1,554 +0,0 @@
-import memPool from './mempool';
-import { DB } from '../database';
-import logger from '../logger';
-
-import { Statistic, TransactionExtended, OptimizedStatistic } from '../mempool.interfaces';
-import config from '../config';
-
-class Statistics {
-  protected intervalTimer: NodeJS.Timer | undefined;
-  protected newStatisticsEntryCallback: ((stats: OptimizedStatistic) => void) | undefined;
-  protected queryTimeout = 120000;
-  protected cache: { [date: string]: OptimizedStatistic[] } = {
-    '24h': [], '1w': [], '1m': [], '3m': [], '6m': [], '1y': [], '2y': [], '3y': []
-  };
-
-  public setNewStatisticsEntryCallback(fn: (stats: OptimizedStatistic) => void) {
-    this.newStatisticsEntryCallback = fn;
-  }
-
-  constructor() { }
-
-  public startStatistics(): void {
-    logger.info('Starting statistics service');
-
-    const now = new Date();
-    const nextInterval = new Date(now.getFullYear(), now.getMonth(), now.getDate(), now.getHours(),
-      Math.floor(now.getMinutes() / 1) * 1 + 1, 0, 0);
-    const difference = nextInterval.getTime() - now.getTime();
-
-    setTimeout(() => {
-      this.runStatistics();
-      this.intervalTimer = setInterval(() => {
-        this.runStatistics();
-      }, 1 * 60 * 1000);
-    }, difference);
-
-    this.createCache();
-    setInterval(this.createCache.bind(this), 600000);
-  }
-
-  public getCache() {
-    return this.cache;
-  }
-
-  private async createCache() {
-    this.cache['24h'] = await this.$list24H();
-    this.cache['1w'] = await this.$list1W();
-    this.cache['1m'] = await this.$list1M();
-    this.cache['3m'] = await this.$list3M();
-    this.cache['6m'] = await this.$list6M();
-    this.cache['1y'] = await this.$list1Y();
-    this.cache['2y'] = await this.$list2Y();
-    this.cache['3y'] = await this.$list3Y();
-    logger.debug('Statistics cache created');
-  }
-
-  private async runStatistics(): Promise<void> {
-    if (!memPool.isInSync()) {
-      return;
-    }
-    const currentMempool = memPool.getMempool();
-    const txPerSecond = memPool.getTxPerSecond();
-    const vBytesPerSecond = memPool.getVBytesPerSecond();
-
-    logger.debug('Running statistics');
-
-    let memPoolArray: TransactionExtended[] = [];
-    for (const i in currentMempool) {
-      if (currentMempool.hasOwnProperty(i)) {
-        memPoolArray.push(currentMempool[i]);
-      }
-    }
-    // Remove 0 and undefined
-    memPoolArray = memPoolArray.filter((tx) => tx.effectiveFeePerVsize);
-
-    if (!memPoolArray.length) {
-      return;
-    }
-
-    memPoolArray.sort((a, b) => a.effectiveFeePerVsize - b.effectiveFeePerVsize);
-    const totalWeight = memPoolArray.map((tx) => tx.vsize).reduce((acc, curr) => acc + curr) * 4;
-    const totalFee = memPoolArray.map((tx) => tx.fee).reduce((acc, curr) => acc + curr);
-
-    const logFees = [1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 30, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200,
-      250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000];
-
-    const weightVsizeFees: { [feePerWU: number]: number } = {};
-    const lastItem = logFees.length - 1;
-
-    memPoolArray.forEach((transaction) => {
-      for (let i = 0; i < logFees.length; i++) {
-        if (
-          (config.MEMPOOL.NETWORK === 'liquid' && (i === lastItem || transaction.effectiveFeePerVsize * 10 < logFees[i + 1]))
-          ||
-          (config.MEMPOOL.NETWORK !== 'liquid' && (i === lastItem || transaction.effectiveFeePerVsize < logFees[i + 1]))
-        ) {
-          if (weightVsizeFees[logFees[i]]) {
-            weightVsizeFees[logFees[i]] += transaction.vsize;
-          } else {
-            weightVsizeFees[logFees[i]] = transaction.vsize;
-          }
-          break;
-        }
-      }
-    });
-
-    const insertId = await this.$create({
-      added: 'NOW()',
-      unconfirmed_transactions: memPoolArray.length,
-      tx_per_second: txPerSecond,
-      vbytes_per_second: Math.round(vBytesPerSecond),
-      mempool_byte_weight: totalWeight,
-      total_fee: totalFee,
-      fee_data: '',
-      vsize_1: weightVsizeFees['1'] || 0,
-      vsize_2: weightVsizeFees['2'] || 0,
-      vsize_3: weightVsizeFees['3'] || 0,
-      vsize_4: weightVsizeFees['4'] || 0,
-      vsize_5: weightVsizeFees['5'] || 0,
-      vsize_6: weightVsizeFees['6'] || 0,
-      vsize_8: weightVsizeFees['8'] || 0,
-      vsize_10: weightVsizeFees['10'] || 0,
-      vsize_12: weightVsizeFees['12'] || 0,
-      vsize_15: weightVsizeFees['15'] || 0,
-      vsize_20: weightVsizeFees['20'] || 0,
-      vsize_30: weightVsizeFees['30'] || 0,
-      vsize_40: weightVsizeFees['40'] || 0,
-      vsize_50: weightVsizeFees['50'] || 0,
-      vsize_60: weightVsizeFees['60'] || 0,
-      vsize_70: weightVsizeFees['70'] || 0,
-      vsize_80: weightVsizeFees['80'] || 0,
-      vsize_90: weightVsizeFees['90'] || 0,
-      vsize_100: weightVsizeFees['100'] || 0,
-      vsize_125: weightVsizeFees['125'] || 0,
-      vsize_150: weightVsizeFees['150'] || 0,
-      vsize_175: weightVsizeFees['175'] || 0,
-      vsize_200: weightVsizeFees['200'] || 0,
-      vsize_250: weightVsizeFees['250'] || 0,
-      vsize_300: weightVsizeFees['300'] || 0,
-      vsize_350: weightVsizeFees['350'] || 0,
-      vsize_400: weightVsizeFees['400'] || 0,
-      vsize_500: weightVsizeFees['500'] || 0,
-      vsize_600: weightVsizeFees['600'] || 0,
-      vsize_700: weightVsizeFees['700'] || 0,
-      vsize_800: weightVsizeFees['800'] || 0,
-      vsize_900: weightVsizeFees['900'] || 0,
-      vsize_1000: weightVsizeFees['1000'] || 0,
-      vsize_1200: weightVsizeFees['1200'] || 0,
-      vsize_1400: weightVsizeFees['1400'] || 0,
-      vsize_1600: weightVsizeFees['1600'] || 0,
-      vsize_1800: weightVsizeFees['1800'] || 0,
-      vsize_2000: weightVsizeFees['2000'] || 0,
-    });
-
-    if (this.newStatisticsEntryCallback && insertId) {
-      const newStats = await this.$get(insertId);
-      if (newStats) {
-        this.newStatisticsEntryCallback(newStats);
-      }
-    }
-  }
-
-  private async $create(statistics: Statistic): Promise<number | undefined> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = `INSERT INTO statistics(
-              added,
-              unconfirmed_transactions,
-              tx_per_second,
-              vbytes_per_second,
-              mempool_byte_weight,
-              fee_data,
-              total_fee,
-              vsize_1,
-              vsize_2,
-              vsize_3,
-              vsize_4,
-              vsize_5,
-              vsize_6,
-              vsize_8,
-              vsize_10,
-              vsize_12,
-              vsize_15,
-              vsize_20,
-              vsize_30,
-              vsize_40,
-              vsize_50,
-              vsize_60,
-              vsize_70,
-              vsize_80,
-              vsize_90,
-              vsize_100,
-              vsize_125,
-              vsize_150,
-              vsize_175,
-              vsize_200,
-              vsize_250,
-              vsize_300,
-              vsize_350,
-              vsize_400,
-              vsize_500,
-              vsize_600,
-              vsize_700,
-              vsize_800,
-              vsize_900,
-              vsize_1000,
-              vsize_1200,
-              vsize_1400,
-              vsize_1600,
-              vsize_1800,
-              vsize_2000
-            )
-            VALUES (${statistics.added}, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
-               ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
-
-      const params: (string | number)[] = [
-        statistics.unconfirmed_transactions,
-        statistics.tx_per_second,
-        statistics.vbytes_per_second,
-        statistics.mempool_byte_weight,
-        statistics.fee_data,
-        statistics.total_fee,
-        statistics.vsize_1,
-        statistics.vsize_2,
-        statistics.vsize_3,
-        statistics.vsize_4,
-        statistics.vsize_5,
-        statistics.vsize_6,
-        statistics.vsize_8,
-        statistics.vsize_10,
-        statistics.vsize_12,
-        statistics.vsize_15,
-        statistics.vsize_20,
-        statistics.vsize_30,
-        statistics.vsize_40,
-        statistics.vsize_50,
-        statistics.vsize_60,
-        statistics.vsize_70,
-        statistics.vsize_80,
-        statistics.vsize_90,
-        statistics.vsize_100,
-        statistics.vsize_125,
-        statistics.vsize_150,
-        statistics.vsize_175,
-        statistics.vsize_200,
-        statistics.vsize_250,
-        statistics.vsize_300,
-        statistics.vsize_350,
-        statistics.vsize_400,
-        statistics.vsize_500,
-        statistics.vsize_600,
-        statistics.vsize_700,
-        statistics.vsize_800,
-        statistics.vsize_900,
-        statistics.vsize_1000,
-        statistics.vsize_1200,
-        statistics.vsize_1400,
-        statistics.vsize_1600,
-        statistics.vsize_1800,
-        statistics.vsize_2000,
-      ];
-      const [result]: any = await connection.query(query, params);
-      connection.release();
-      return result.insertId;
-    } catch (e) {
-      logger.err('$create() error' + (e instanceof Error ? e.message : e));
-    }
-  }
-
-  private getQueryForDaysAvg(div: number, interval: string) {
-    return `SELECT id, UNIX_TIMESTAMP(added) as added,
-      CAST(avg(unconfirmed_transactions) as FLOAT) as unconfirmed_transactions,
-      CAST(avg(tx_per_second) as FLOAT) as tx_per_second,
-      CAST(avg(vbytes_per_second) as FLOAT) as vbytes_per_second,
-      CAST(avg(vsize_1) as FLOAT) as vsize_1,
-      CAST(avg(vsize_2) as FLOAT) as vsize_2,
-      CAST(avg(vsize_3) as FLOAT) as vsize_3,
-      CAST(avg(vsize_4) as FLOAT) as vsize_4,
-      CAST(avg(vsize_5) as FLOAT) as vsize_5,
-      CAST(avg(vsize_6) as FLOAT) as vsize_6,
-      CAST(avg(vsize_8) as FLOAT) as vsize_8,
-      CAST(avg(vsize_10) as FLOAT) as vsize_10,
-      CAST(avg(vsize_12) as FLOAT) as vsize_12,
-      CAST(avg(vsize_15) as FLOAT) as vsize_15,
-      CAST(avg(vsize_20) as FLOAT) as vsize_20,
-      CAST(avg(vsize_30) as FLOAT) as vsize_30,
-      CAST(avg(vsize_40) as FLOAT) as vsize_40,
-      CAST(avg(vsize_50) as FLOAT) as vsize_50,
-      CAST(avg(vsize_60) as FLOAT) as vsize_60,
-      CAST(avg(vsize_70) as FLOAT) as vsize_70,
-      CAST(avg(vsize_80) as FLOAT) as vsize_80,
-      CAST(avg(vsize_90) as FLOAT) as vsize_90,
-      CAST(avg(vsize_100) as FLOAT) as vsize_100,
-      CAST(avg(vsize_125) as FLOAT) as vsize_125,
-      CAST(avg(vsize_150) as FLOAT) as vsize_150,
-      CAST(avg(vsize_175) as FLOAT) as vsize_175,
-      CAST(avg(vsize_200) as FLOAT) as vsize_200,
-      CAST(avg(vsize_250) as FLOAT) as vsize_250,
-      CAST(avg(vsize_300) as FLOAT) as vsize_300,
-      CAST(avg(vsize_350) as FLOAT) as vsize_350,
-      CAST(avg(vsize_400) as FLOAT) as vsize_400,
-      CAST(avg(vsize_500) as FLOAT) as vsize_500,
-      CAST(avg(vsize_600) as FLOAT) as vsize_600,
-      CAST(avg(vsize_700) as FLOAT) as vsize_700,
-      CAST(avg(vsize_800) as FLOAT) as vsize_800,
-      CAST(avg(vsize_900) as FLOAT) as vsize_900,
-      CAST(avg(vsize_1000) as FLOAT) as vsize_1000,
-      CAST(avg(vsize_1200) as FLOAT) as vsize_1200,
-      CAST(avg(vsize_1400) as FLOAT) as vsize_1400,
-      CAST(avg(vsize_1600) as FLOAT) as vsize_1600,
-      CAST(avg(vsize_1800) as FLOAT) as vsize_1800,
-      CAST(avg(vsize_2000) as FLOAT) as vsize_2000 \
-      FROM statistics \
-      WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() \
-      GROUP BY UNIX_TIMESTAMP(added) DIV ${div} \
-      ORDER BY id DESC;`;
-  }
-
-  private getQueryForDays(div: number, interval: string) {
-    return `SELECT id, UNIX_TIMESTAMP(added) as added, unconfirmed_transactions,
-      tx_per_second,
-      vbytes_per_second,
-      vsize_1,
-      vsize_2,
-      vsize_3,
-      vsize_4,
-      vsize_5,
-      vsize_6,
-      vsize_8,
-      vsize_10,
-      vsize_12,
-      vsize_15,
-      vsize_20,
-      vsize_30,
-      vsize_40,
-      vsize_50,
-      vsize_60,
-      vsize_70,
-      vsize_80,
-      vsize_90,
-      vsize_100,
-      vsize_125,
-      vsize_150,
-      vsize_175,
-      vsize_200,
-      vsize_250,
-      vsize_300,
-      vsize_350,
-      vsize_400,
-      vsize_500,
-      vsize_600,
-      vsize_700,
-      vsize_800,
-      vsize_900,
-      vsize_1000,
-      vsize_1200,
-      vsize_1400,
-      vsize_1600,
-      vsize_1800,
-      vsize_2000 \
-      FROM statistics \
-      WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() \
-      GROUP BY UNIX_TIMESTAMP(added) DIV ${div} \
-      ORDER BY id DESC;`;
-  }
-
-  public async $get(id: number): Promise<OptimizedStatistic | undefined> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics WHERE id = ?`;
-      const [rows] = await connection.query<any>(query, [id]);
-      connection.release();
-      if (rows[0]) {
-        return this.mapStatisticToOptimizedStatistic([rows[0]])[0];
-      }
-    } catch (e) {
-      logger.err('$list2H() error' + (e instanceof Error ? e.message : e));
-    }
-  }
-
-  public async $list2H(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics ORDER BY id DESC LIMIT 120`;
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list2H() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list24H(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics ORDER BY id DESC LIMIT 1440`;
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list24h() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list1W(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDaysAvg(600, '1 WEEK'); // 10m interval
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list1W() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list1M(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDaysAvg(3600, '1 MONTH'); // 1h interval
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list1M() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list3M(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDaysAvg(14400, '3 MONTH'); // 4h interval
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list3M() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list6M(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDaysAvg(21600, '6 MONTH'); // 6h interval 
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list6M() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list1Y(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDays(43200, '1 YEAR'); // 12h interval
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list1Y() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list2Y(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDays(86400, "2 YEAR"); // 1d interval
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list2Y() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  public async $list3Y(): Promise<OptimizedStatistic[]> {
-    try {
-      const connection = await DB.pool.getConnection();
-      const query = this.getQueryForDays(86400, "3 YEAR"); // 1d interval
-      const [rows] = await connection.query<any>({ sql: query, timeout: this.queryTimeout });
-      connection.release();
-      return this.mapStatisticToOptimizedStatistic(rows);
-    } catch (e) {
-      logger.err('$list3Y() error' + (e instanceof Error ? e.message : e));
-      return [];
-    }
-  }
-
-  private mapStatisticToOptimizedStatistic(statistic: Statistic[]): OptimizedStatistic[] {
-    return statistic.map((s) => {
-      return {
-        id: s.id || 0,
-        added: s.added,
-        unconfirmed_transactions: s.unconfirmed_transactions,
-        tx_per_second: s.tx_per_second,
-        vbytes_per_second: s.vbytes_per_second,
-        mempool_byte_weight: s.mempool_byte_weight,
-        total_fee: s.total_fee,
-        vsizes: [
-          s.vsize_1,
-          s.vsize_2,
-          s.vsize_3,
-          s.vsize_4,
-          s.vsize_5,
-          s.vsize_6,
-          s.vsize_8,
-          s.vsize_10,
-          s.vsize_12,
-          s.vsize_15,
-          s.vsize_20,
-          s.vsize_30,
-          s.vsize_40,
-          s.vsize_50,
-          s.vsize_60,
-          s.vsize_70,
-          s.vsize_80,
-          s.vsize_90,
-          s.vsize_100,
-          s.vsize_125,
-          s.vsize_150,
-          s.vsize_175,
-          s.vsize_200,
-          s.vsize_250,
-          s.vsize_300,
-          s.vsize_350,
-          s.vsize_400,
-          s.vsize_500,
-          s.vsize_600,
-          s.vsize_700,
-          s.vsize_800,
-          s.vsize_900,
-          s.vsize_1000,
-          s.vsize_1200,
-          s.vsize_1400,
-          s.vsize_1600,
-          s.vsize_1800,
-          s.vsize_2000,
-        ]
-      };
-    });
-  }
-
-}
-
-export default new Statistics();

backend/src/api/statistics/statistics-api.ts

@@ -0,0 +1,430 @@
+import DB from '../../database';
+import logger from '../../logger';
+import { Statistic, OptimizedStatistic } from '../../mempool.interfaces';
+
+class StatisticsApi {
+  protected queryTimeout = 120000;
+
+  public async $createZeroedStatistic(): Promise<number | undefined> {
+    try {
+      const query = `INSERT INTO statistics(
+              added,
+              unconfirmed_transactions,
+              tx_per_second,
+              vbytes_per_second,
+              mempool_byte_weight,
+              fee_data,
+              total_fee,
+              vsize_1,
+              vsize_2,
+              vsize_3,
+              vsize_4,
+              vsize_5,
+              vsize_6,
+              vsize_8,
+              vsize_10,
+              vsize_12,
+              vsize_15,
+              vsize_20,
+              vsize_30,
+              vsize_40,
+              vsize_50,
+              vsize_60,
+              vsize_70,
+              vsize_80,
+              vsize_90,
+              vsize_100,
+              vsize_125,
+              vsize_150,
+              vsize_175,
+              vsize_200,
+              vsize_250,
+              vsize_300,
+              vsize_350,
+              vsize_400,
+              vsize_500,
+              vsize_600,
+              vsize_700,
+              vsize_800,
+              vsize_900,
+              vsize_1000,
+              vsize_1200,
+              vsize_1400,
+              vsize_1600,
+              vsize_1800,
+              vsize_2000
+            )
+            VALUES (NOW(), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+               0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)`;
+      const [result]: any = await DB.query(query);
+      return result.insertId;
+    } catch (e) {
+      logger.err('$create() error' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  public async $create(statistics: Statistic): Promise<number | undefined> {
+    try {
+      const query = `INSERT INTO statistics(
+              added,
+              unconfirmed_transactions,
+              tx_per_second,
+              vbytes_per_second,
+              mempool_byte_weight,
+              fee_data,
+              total_fee,
+              vsize_1,
+              vsize_2,
+              vsize_3,
+              vsize_4,
+              vsize_5,
+              vsize_6,
+              vsize_8,
+              vsize_10,
+              vsize_12,
+              vsize_15,
+              vsize_20,
+              vsize_30,
+              vsize_40,
+              vsize_50,
+              vsize_60,
+              vsize_70,
+              vsize_80,
+              vsize_90,
+              vsize_100,
+              vsize_125,
+              vsize_150,
+              vsize_175,
+              vsize_200,
+              vsize_250,
+              vsize_300,
+              vsize_350,
+              vsize_400,
+              vsize_500,
+              vsize_600,
+              vsize_700,
+              vsize_800,
+              vsize_900,
+              vsize_1000,
+              vsize_1200,
+              vsize_1400,
+              vsize_1600,
+              vsize_1800,
+              vsize_2000
+            )
+            VALUES (${statistics.added}, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
+               ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
+
+      const params: (string | number)[] = [
+        statistics.unconfirmed_transactions,
+        statistics.tx_per_second,
+        statistics.vbytes_per_second,
+        statistics.mempool_byte_weight,
+        statistics.fee_data,
+        statistics.total_fee,
+        statistics.vsize_1,
+        statistics.vsize_2,
+        statistics.vsize_3,
+        statistics.vsize_4,
+        statistics.vsize_5,
+        statistics.vsize_6,
+        statistics.vsize_8,
+        statistics.vsize_10,
+        statistics.vsize_12,
+        statistics.vsize_15,
+        statistics.vsize_20,
+        statistics.vsize_30,
+        statistics.vsize_40,
+        statistics.vsize_50,
+        statistics.vsize_60,
+        statistics.vsize_70,
+        statistics.vsize_80,
+        statistics.vsize_90,
+        statistics.vsize_100,
+        statistics.vsize_125,
+        statistics.vsize_150,
+        statistics.vsize_175,
+        statistics.vsize_200,
+        statistics.vsize_250,
+        statistics.vsize_300,
+        statistics.vsize_350,
+        statistics.vsize_400,
+        statistics.vsize_500,
+        statistics.vsize_600,
+        statistics.vsize_700,
+        statistics.vsize_800,
+        statistics.vsize_900,
+        statistics.vsize_1000,
+        statistics.vsize_1200,
+        statistics.vsize_1400,
+        statistics.vsize_1600,
+        statistics.vsize_1800,
+        statistics.vsize_2000,
+      ];
+      const [result]: any = await DB.query(query, params);
+      return result.insertId;
+    } catch (e) {
+      logger.err('$create() error' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  private getQueryForDaysAvg(div: number, interval: string) {
+    return `SELECT
+      UNIX_TIMESTAMP(added) as added,
+      CAST(avg(vbytes_per_second) as DOUBLE) as vbytes_per_second,
+      CAST(avg(vsize_1) as DOUBLE) as vsize_1,
+      CAST(avg(vsize_2) as DOUBLE) as vsize_2,
+      CAST(avg(vsize_3) as DOUBLE) as vsize_3,
+      CAST(avg(vsize_4) as DOUBLE) as vsize_4,
+      CAST(avg(vsize_5) as DOUBLE) as vsize_5,
+      CAST(avg(vsize_6) as DOUBLE) as vsize_6,
+      CAST(avg(vsize_8) as DOUBLE) as vsize_8,
+      CAST(avg(vsize_10) as DOUBLE) as vsize_10,
+      CAST(avg(vsize_12) as DOUBLE) as vsize_12,
+      CAST(avg(vsize_15) as DOUBLE) as vsize_15,
+      CAST(avg(vsize_20) as DOUBLE) as vsize_20,
+      CAST(avg(vsize_30) as DOUBLE) as vsize_30,
+      CAST(avg(vsize_40) as DOUBLE) as vsize_40,
+      CAST(avg(vsize_50) as DOUBLE) as vsize_50,
+      CAST(avg(vsize_60) as DOUBLE) as vsize_60,
+      CAST(avg(vsize_70) as DOUBLE) as vsize_70,
+      CAST(avg(vsize_80) as DOUBLE) as vsize_80,
+      CAST(avg(vsize_90) as DOUBLE) as vsize_90,
+      CAST(avg(vsize_100) as DOUBLE) as vsize_100,
+      CAST(avg(vsize_125) as DOUBLE) as vsize_125,
+      CAST(avg(vsize_150) as DOUBLE) as vsize_150,
+      CAST(avg(vsize_175) as DOUBLE) as vsize_175,
+      CAST(avg(vsize_200) as DOUBLE) as vsize_200,
+      CAST(avg(vsize_250) as DOUBLE) as vsize_250,
+      CAST(avg(vsize_300) as DOUBLE) as vsize_300,
+      CAST(avg(vsize_350) as DOUBLE) as vsize_350,
+      CAST(avg(vsize_400) as DOUBLE) as vsize_400,
+      CAST(avg(vsize_500) as DOUBLE) as vsize_500,
+      CAST(avg(vsize_600) as DOUBLE) as vsize_600,
+      CAST(avg(vsize_700) as DOUBLE) as vsize_700,
+      CAST(avg(vsize_800) as DOUBLE) as vsize_800,
+      CAST(avg(vsize_900) as DOUBLE) as vsize_900,
+      CAST(avg(vsize_1000) as DOUBLE) as vsize_1000,
+      CAST(avg(vsize_1200) as DOUBLE) as vsize_1200,
+      CAST(avg(vsize_1400) as DOUBLE) as vsize_1400,
+      CAST(avg(vsize_1600) as DOUBLE) as vsize_1600,
+      CAST(avg(vsize_1800) as DOUBLE) as vsize_1800,
+      CAST(avg(vsize_2000) as DOUBLE) as vsize_2000 \
+      FROM statistics \
+      WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() \
+      GROUP BY UNIX_TIMESTAMP(added) DIV ${div} \
+      ORDER BY statistics.added DESC;`;
+  }
+
+  private getQueryForDays(div: number, interval: string) {
+    return `SELECT
+      UNIX_TIMESTAMP(added) as added,
+      CAST(avg(vbytes_per_second) as DOUBLE) as vbytes_per_second,
+      vsize_1,
+      vsize_2,
+      vsize_3,
+      vsize_4,
+      vsize_5,
+      vsize_6,
+      vsize_8,
+      vsize_10,
+      vsize_12,
+      vsize_15,
+      vsize_20,
+      vsize_30,
+      vsize_40,
+      vsize_50,
+      vsize_60,
+      vsize_70,
+      vsize_80,
+      vsize_90,
+      vsize_100,
+      vsize_125,
+      vsize_150,
+      vsize_175,
+      vsize_200,
+      vsize_250,
+      vsize_300,
+      vsize_350,
+      vsize_400,
+      vsize_500,
+      vsize_600,
+      vsize_700,
+      vsize_800,
+      vsize_900,
+      vsize_1000,
+      vsize_1200,
+      vsize_1400,
+      vsize_1600,
+      vsize_1800,
+      vsize_2000 \
+      FROM statistics \
+      WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() \
+      GROUP BY UNIX_TIMESTAMP(added) DIV ${div} \
+      ORDER BY statistics.added DESC;`;
+  }
+
+  public async $get(id: number): Promise<OptimizedStatistic | undefined> {
+    try {
+      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics WHERE id = ?`;
+      const [rows] = await DB.query(query, [id]);
+      if (rows[0]) {
+        return this.mapStatisticToOptimizedStatistic([rows[0]])[0];
+      }
+    } catch (e) {
+      logger.err('$list2H() error' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  public async $list2H(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics ORDER BY statistics.added DESC LIMIT 120`;
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list2H() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list24H(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = `SELECT *, UNIX_TIMESTAMP(added) as added FROM statistics ORDER BY statistics.added DESC LIMIT 1440`;
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list24h() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list1W(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDaysAvg(300, '1 WEEK'); // 5m interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list1W() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list1M(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDaysAvg(1800, '1 MONTH'); // 30m interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list1M() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list3M(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDaysAvg(7200, '3 MONTH'); // 2h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list3M() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list6M(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDaysAvg(10800, '6 MONTH'); // 3h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list6M() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list1Y(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDays(28800, '1 YEAR'); // 8h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list1Y() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list2Y(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDays(28800, '2 YEAR'); // 8h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list2Y() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $list3Y(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDays(43200, '3 YEAR'); // 12h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list3Y() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  private mapStatisticToOptimizedStatistic(statistic: Statistic[]): OptimizedStatistic[] {
+    return statistic.map((s) => {
+      return {
+        added: s.added,
+        vbytes_per_second: s.vbytes_per_second,
+        mempool_byte_weight: s.mempool_byte_weight,
+        total_fee: s.total_fee,
+        vsizes: [
+          s.vsize_1,
+          s.vsize_2,
+          s.vsize_3,
+          s.vsize_4,
+          s.vsize_5,
+          s.vsize_6,
+          s.vsize_8,
+          s.vsize_10,
+          s.vsize_12,
+          s.vsize_15,
+          s.vsize_20,
+          s.vsize_30,
+          s.vsize_40,
+          s.vsize_50,
+          s.vsize_60,
+          s.vsize_70,
+          s.vsize_80,
+          s.vsize_90,
+          s.vsize_100,
+          s.vsize_125,
+          s.vsize_150,
+          s.vsize_175,
+          s.vsize_200,
+          s.vsize_250,
+          s.vsize_300,
+          s.vsize_350,
+          s.vsize_400,
+          s.vsize_500,
+          s.vsize_600,
+          s.vsize_700,
+          s.vsize_800,
+          s.vsize_900,
+          s.vsize_1000,
+          s.vsize_1200,
+          s.vsize_1400,
+          s.vsize_1600,
+          s.vsize_1800,
+          s.vsize_2000,
+        ]
+      };
+    });
+  }
+}
+
+export default new StatisticsApi();

backend/src/api/statistics/statistics.routes.ts

@@ -0,0 +1,67 @@
+import { Application, Request, Response } from 'express';
+import config from '../../config';
+import statisticsApi from './statistics-api';
+
+class StatisticsRoutes {
+  public initRoutes(app: Application) {
+    app
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/2h', this.$getStatisticsByTime.bind(this, '2h'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/24h', this.$getStatisticsByTime.bind(this, '24h'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/1w', this.$getStatisticsByTime.bind(this, '1w'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/1m', this.$getStatisticsByTime.bind(this, '1m'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/3m', this.$getStatisticsByTime.bind(this, '3m'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/6m', this.$getStatisticsByTime.bind(this, '6m'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/1y', this.$getStatisticsByTime.bind(this, '1y'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/2y', this.$getStatisticsByTime.bind(this, '2y'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/3y', this.$getStatisticsByTime.bind(this, '3y'))
+    ;
+  }
+
+  private async $getStatisticsByTime(time: '2h' | '24h' | '1w' | '1m' | '3m' | '6m' | '1y' | '2y' | '3y', req: Request, res: Response) {
+    res.header('Pragma', 'public');
+    res.header('Cache-control', 'public');
+    res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+
+    try {
+      let result;
+      switch (time as string) {
+        case '2h':
+          result = await statisticsApi.$list2H();
+          res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+          break;
+        case '24h':
+          result = await statisticsApi.$list24H();
+          res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+          break;
+        case '1w':
+          result = await statisticsApi.$list1W();
+          break;
+        case '1m':
+          result = await statisticsApi.$list1M();
+          break;
+        case '3m':
+          result = await statisticsApi.$list3M();
+          break;
+        case '6m':
+          result = await statisticsApi.$list6M();
+          break;
+        case '1y':
+          result = await statisticsApi.$list1Y();
+          break;
+        case '2y':
+          result = await statisticsApi.$list2Y();
+          break;
+        case '3y':
+          result = await statisticsApi.$list3Y();
+          break;
+        default:
+          result = await statisticsApi.$list2H();
+      }
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+}
+
+export default new StatisticsRoutes();

backend/src/api/statistics/statistics.ts

@@ -0,0 +1,153 @@
+import memPool from '../mempool';
+import logger from '../../logger';
+import { TransactionExtended, OptimizedStatistic } from '../../mempool.interfaces';
+import { Common } from '../common';
+import statisticsApi from './statistics-api';
+
+class Statistics {
+  protected intervalTimer: NodeJS.Timer | undefined;
+  protected newStatisticsEntryCallback: ((stats: OptimizedStatistic) => void) | undefined;
+
+  public setNewStatisticsEntryCallback(fn: (stats: OptimizedStatistic) => void) {
+    this.newStatisticsEntryCallback = fn;
+  }
+
+  public startStatistics(): void {
+    logger.info('Starting statistics service');
+
+    const now = new Date();
+    const nextInterval = new Date(now.getFullYear(), now.getMonth(), now.getDate(), now.getHours(),
+      Math.floor(now.getMinutes() / 1) * 1 + 1, 0, 0);
+    const difference = nextInterval.getTime() - now.getTime();
+
+    setTimeout(() => {
+      this.runStatistics();
+      this.intervalTimer = setInterval(() => {
+        this.runStatistics();
+      }, 1 * 60 * 1000);
+    }, difference);
+  }
+
+  private async runStatistics(): Promise<void> {
+    if (!memPool.isInSync()) {
+      return;
+    }
+    const currentMempool = memPool.getMempool();
+    const txPerSecond = memPool.getTxPerSecond();
+    const vBytesPerSecond = memPool.getVBytesPerSecond();
+
+    logger.debug('Running statistics');
+
+    let memPoolArray: TransactionExtended[] = [];
+    for (const i in currentMempool) {
+      if (currentMempool.hasOwnProperty(i)) {
+        memPoolArray.push(currentMempool[i]);
+      }
+    }
+    // Remove 0 and undefined
+    memPoolArray = memPoolArray.filter((tx) => tx.effectiveFeePerVsize);
+
+    if (!memPoolArray.length) {
+      try {
+        const insertIdZeroed = await statisticsApi.$createZeroedStatistic();
+        if (this.newStatisticsEntryCallback && insertIdZeroed) {
+          const newStats = await statisticsApi.$get(insertIdZeroed);
+          if (newStats) {
+            this.newStatisticsEntryCallback(newStats);
+          }
+        }
+      } catch (e) {
+        logger.err('Unable to insert zeroed statistics. ' + e);
+      }
+      return;
+    }
+
+    memPoolArray.sort((a, b) => a.effectiveFeePerVsize - b.effectiveFeePerVsize);
+    const totalWeight = memPoolArray.map((tx) => tx.vsize).reduce((acc, curr) => acc + curr) * 4;
+    const totalFee = memPoolArray.map((tx) => tx.fee).reduce((acc, curr) => acc + curr);
+
+    const logFees = [1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 30, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200,
+      250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000];
+
+    const weightVsizeFees: { [feePerWU: number]: number } = {};
+    const lastItem = logFees.length - 1;
+
+    memPoolArray.forEach((transaction) => {
+      for (let i = 0; i < logFees.length; i++) {
+        if (
+          (Common.isLiquid() && (i === lastItem || transaction.effectiveFeePerVsize * 10 < logFees[i + 1]))
+          ||
+          (!Common.isLiquid() && (i === lastItem || transaction.effectiveFeePerVsize < logFees[i + 1]))
+        ) {
+          if (weightVsizeFees[logFees[i]]) {
+            weightVsizeFees[logFees[i]] += transaction.vsize;
+          } else {
+            weightVsizeFees[logFees[i]] = transaction.vsize;
+          }
+          break;
+        }
+      }
+    });
+
+    try {
+      const insertId = await statisticsApi.$create({
+        added: 'NOW()',
+        unconfirmed_transactions: memPoolArray.length,
+        tx_per_second: txPerSecond,
+        vbytes_per_second: Math.round(vBytesPerSecond),
+        mempool_byte_weight: totalWeight,
+        total_fee: totalFee,
+        fee_data: '',
+        vsize_1: weightVsizeFees['1'] || 0,
+        vsize_2: weightVsizeFees['2'] || 0,
+        vsize_3: weightVsizeFees['3'] || 0,
+        vsize_4: weightVsizeFees['4'] || 0,
+        vsize_5: weightVsizeFees['5'] || 0,
+        vsize_6: weightVsizeFees['6'] || 0,
+        vsize_8: weightVsizeFees['8'] || 0,
+        vsize_10: weightVsizeFees['10'] || 0,
+        vsize_12: weightVsizeFees['12'] || 0,
+        vsize_15: weightVsizeFees['15'] || 0,
+        vsize_20: weightVsizeFees['20'] || 0,
+        vsize_30: weightVsizeFees['30'] || 0,
+        vsize_40: weightVsizeFees['40'] || 0,
+        vsize_50: weightVsizeFees['50'] || 0,
+        vsize_60: weightVsizeFees['60'] || 0,
+        vsize_70: weightVsizeFees['70'] || 0,
+        vsize_80: weightVsizeFees['80'] || 0,
+        vsize_90: weightVsizeFees['90'] || 0,
+        vsize_100: weightVsizeFees['100'] || 0,
+        vsize_125: weightVsizeFees['125'] || 0,
+        vsize_150: weightVsizeFees['150'] || 0,
+        vsize_175: weightVsizeFees['175'] || 0,
+        vsize_200: weightVsizeFees['200'] || 0,
+        vsize_250: weightVsizeFees['250'] || 0,
+        vsize_300: weightVsizeFees['300'] || 0,
+        vsize_350: weightVsizeFees['350'] || 0,
+        vsize_400: weightVsizeFees['400'] || 0,
+        vsize_500: weightVsizeFees['500'] || 0,
+        vsize_600: weightVsizeFees['600'] || 0,
+        vsize_700: weightVsizeFees['700'] || 0,
+        vsize_800: weightVsizeFees['800'] || 0,
+        vsize_900: weightVsizeFees['900'] || 0,
+        vsize_1000: weightVsizeFees['1000'] || 0,
+        vsize_1200: weightVsizeFees['1200'] || 0,
+        vsize_1400: weightVsizeFees['1400'] || 0,
+        vsize_1600: weightVsizeFees['1600'] || 0,
+        vsize_1800: weightVsizeFees['1800'] || 0,
+        vsize_2000: weightVsizeFees['2000'] || 0,
+      });
+
+      if (this.newStatisticsEntryCallback && insertId) {
+        const newStats = await statisticsApi.$get(insertId);
+        if (newStats) {
+          this.newStatisticsEntryCallback(newStats);
+        }
+      }
+    } catch (e) {
+      logger.err('Unable to insert statistics. ' + e);
+    }
+  }
+}
+
+export default new Statistics();

backend/src/api/transaction-utils.ts

@@ -2,6 +2,7 @@ import bitcoinApi from './bitcoin/bitcoin-api-factory';
 import { TransactionExtended, TransactionMinerInfo } from '../mempool.interfaces';
 import { IEsploraApi } from './bitcoin/esplora-api.interface';
 import config from '../config';
+import { Common } from './common';
 
 class TransactionUtils {
   constructor() { }
@@ -20,8 +21,8 @@ class TransactionUtils {
     };
   }
 
-  public async $getTransactionExtended(txId: string, addPrevouts = false): Promise<TransactionExtended> {
-    const transaction: IEsploraApi.Transaction = await bitcoinApi.$getRawTransaction(txId, false, addPrevouts);
+  public async $getTransactionExtended(txId: string, addPrevouts = false, lazyPrevouts = false): Promise<TransactionExtended> {
+    const transaction: IEsploraApi.Transaction = await bitcoinApi.$getRawTransaction(txId, false, addPrevouts, lazyPrevouts);
     return this.extendTransaction(transaction);
   }
 
@@ -31,7 +32,8 @@ class TransactionUtils {
       // @ts-ignore
       return transaction;
     }
-    const feePerVbytes = Math.max(config.MEMPOOL.NETWORK === 'liquid' ? 0.1 : 1, (transaction.fee || 0) / (transaction.weight / 4));
+    const feePerVbytes = Math.max(Common.isLiquid() ? 0.1 : 1,
+      (transaction.fee || 0) / (transaction.weight / 4));
     const transactionExtended: TransactionExtended = Object.assign({
       vsize: Math.round(transaction.weight / 4),
       feePerVsize: feePerVbytes,
@@ -42,6 +44,14 @@ class TransactionUtils {
     }
     return transactionExtended;
   }
+
+  public hex2ascii(hex: string) {
+    let str = '';
+    for (let i = 0; i < hex.length; i += 2) {
+      str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
+    }
+    return str;
+  }
 }
 
 export default new TransactionUtils();

backend/src/api/tx-selection-worker.ts

@@ -0,0 +1,338 @@
+import config from '../config';
+import logger from '../logger';
+import { TransactionExtended, MempoolBlockWithTransactions, AuditTransaction } from '../mempool.interfaces';
+import { PairingHeap } from '../utils/pairing-heap';
+import { Common } from './common';
+import { parentPort } from 'worker_threads';
+
+if (parentPort) {
+  parentPort.on('message', (params: { mempool: { [txid: string]: TransactionExtended }, blockLimit: number, weightLimit: number | null, condenseRest: boolean}) => {
+    const { mempool, blocks } = makeBlockTemplates(params);
+
+    // return the result to main thread.
+    if (parentPort) {
+     parentPort.postMessage({ mempool, blocks });
+    }
+  });
+}
+
+/*
+* Build projected mempool blocks using an approximation of the transaction selection algorithm from Bitcoin Core
+* (see BlockAssembler in https://github.com/bitcoin/bitcoin/blob/master/src/node/miner.cpp)
+*
+* blockLimit: number of blocks to build in total.
+* weightLimit: maximum weight of transactions to consider using the selection algorithm.
+*              if weightLimit is significantly lower than the mempool size, results may start to diverge from getBlockTemplate 
+* condenseRest: whether to ignore excess transactions or append them to the final block.
+*/
+function makeBlockTemplates({ mempool, blockLimit, weightLimit, condenseRest }: { mempool: { [txid: string]: TransactionExtended }, blockLimit: number, weightLimit?: number | null, condenseRest?: boolean | null })
+  : { mempool: { [txid: string]: TransactionExtended }, blocks: MempoolBlockWithTransactions[] } {
+  const start = Date.now();
+  const auditPool: { [txid: string]: AuditTransaction } = {};
+  const mempoolArray: AuditTransaction[] = [];
+  const restOfArray: TransactionExtended[] = [];
+  
+  let weight = 0;
+  const maxWeight = weightLimit ? Math.max(4_000_000 * blockLimit, weightLimit) : Infinity;
+  // grab the top feerate txs up to maxWeight
+  Object.values(mempool).sort((a, b) => b.feePerVsize - a.feePerVsize).forEach(tx => {
+    weight += tx.weight;
+    if (weight >= maxWeight) {
+      restOfArray.push(tx);
+      return;
+    }
+    // initializing everything up front helps V8 optimize property access later
+    auditPool[tx.txid] = {
+      txid: tx.txid,
+      fee: tx.fee,
+      size: tx.size,
+      weight: tx.weight,
+      feePerVsize: tx.feePerVsize,
+      vin: tx.vin,
+      relativesSet: false,
+      ancestorMap: new Map<string, AuditTransaction>(),
+      children: new Set<AuditTransaction>(),
+      ancestorFee: 0,
+      ancestorWeight: 0,
+      score: 0,
+      used: false,
+      modified: false,
+      modifiedNode: null,
+    };
+    mempoolArray.push(auditPool[tx.txid]);
+  });
+
+  // Build relatives graph & calculate ancestor scores
+  for (const tx of mempoolArray) {
+    if (!tx.relativesSet) {
+      setRelatives(tx, auditPool);
+    }
+  }
+
+  // Sort by descending ancestor score
+  mempoolArray.sort((a, b) => (b.score || 0) - (a.score || 0));
+
+  // Build blocks by greedily choosing the highest feerate package
+  // (i.e. the package rooted in the transaction with the best ancestor score)
+  const blocks: MempoolBlockWithTransactions[] = [];
+  let blockWeight = 4000;
+  let blockSize = 0;
+  let transactions: AuditTransaction[] = [];
+  const modified: PairingHeap<AuditTransaction> = new PairingHeap((a, b): boolean => (a.score || 0) > (b.score || 0));
+  let overflow: AuditTransaction[] = [];
+  let failures = 0;
+  let top = 0;
+  while ((top < mempoolArray.length || !modified.isEmpty()) && (condenseRest || blocks.length < blockLimit)) {
+    // skip invalid transactions
+    while (top < mempoolArray.length && (mempoolArray[top].used || mempoolArray[top].modified)) {
+      top++;
+    }
+
+    // Select best next package
+    let nextTx;
+    const nextPoolTx = mempoolArray[top];
+    const nextModifiedTx = modified.peek();
+    if (nextPoolTx && (!nextModifiedTx || (nextPoolTx.score || 0) > (nextModifiedTx.score || 0))) {
+      nextTx = nextPoolTx;
+      top++;
+    } else {
+      modified.pop();
+      if (nextModifiedTx) {
+        nextTx = nextModifiedTx;
+        nextTx.modifiedNode = undefined;
+      }
+    }
+
+    if (nextTx && !nextTx?.used) {
+      // Check if the package fits into this block
+      if (blockWeight + nextTx.ancestorWeight < config.MEMPOOL.BLOCK_WEIGHT_UNITS) {
+        const ancestors: AuditTransaction[] = Array.from(nextTx.ancestorMap.values());
+        const descendants: AuditTransaction[] = [];
+        // sort ancestors by dependency graph (equivalent to sorting by ascending ancestor count)
+        const sortedTxSet = [...ancestors.sort((a, b) => { return (a.ancestorMap.size || 0) - (b.ancestorMap.size || 0); }), nextTx];
+        const effectiveFeeRate = nextTx.ancestorFee / (nextTx.ancestorWeight / 4);
+        const used: AuditTransaction[] = [];
+        while (sortedTxSet.length) {
+          const ancestor = sortedTxSet.pop();
+          const mempoolTx = mempool[ancestor.txid];
+          ancestor.used = true;
+          ancestor.usedBy = nextTx.txid;
+          // update original copy of this tx with effective fee rate & relatives data
+          mempoolTx.effectiveFeePerVsize = effectiveFeeRate;
+          mempoolTx.ancestors = sortedTxSet.map((a) => {
+            return {
+              txid: a.txid,
+              fee: a.fee,
+              weight: a.weight,
+            };
+          }).reverse();
+          mempoolTx.descendants = descendants.map((a) => {
+            return {
+              txid: a.txid,
+              fee: a.fee,
+              weight: a.weight,
+            };
+          });
+          descendants.push(ancestor);
+          mempoolTx.cpfpChecked = true;
+          transactions.push(ancestor);
+          blockSize += ancestor.size;
+          blockWeight += ancestor.weight;
+          used.push(ancestor);
+        }
+
+        // remove these as valid package ancestors for any descendants remaining in the mempool
+        if (used.length) {
+          used.forEach(tx => {
+            updateDescendants(tx, auditPool, modified);
+          });
+        }
+
+        failures = 0;
+      } else {
+        // hold this package in an overflow list while we check for smaller options
+        overflow.push(nextTx);
+        failures++;
+      }
+    }
+
+    // this block is full
+    const exceededPackageTries = failures > 1000 && blockWeight > (config.MEMPOOL.BLOCK_WEIGHT_UNITS - 4000);
+    const queueEmpty = top >= mempoolArray.length && modified.isEmpty();
+    if ((exceededPackageTries || queueEmpty) && (!condenseRest || blocks.length < blockLimit - 1)) {
+      // construct this block
+      if (transactions.length) {
+        blocks.push(dataToMempoolBlocks(transactions.map(t => mempool[t.txid]), blockSize, blockWeight, blocks.length));
+      }
+      // reset for the next block
+      transactions = [];
+      blockSize = 0;
+      blockWeight = 4000;
+
+      // 'overflow' packages didn't fit in this block, but are valid candidates for the next
+      for (const overflowTx of overflow.reverse()) {
+        if (overflowTx.modified) {
+          overflowTx.modifiedNode = modified.add(overflowTx);
+        } else {
+          top--;
+          mempoolArray[top] = overflowTx;
+        }
+      }
+      overflow = [];
+    }
+  }
+  if (condenseRest) {
+    // pack any leftover transactions into the last block
+    for (const tx of overflow) {
+      if (!tx || tx?.used) {
+        continue;
+      }
+      blockWeight += tx.weight;
+      blockSize += tx.size;
+      const mempoolTx = mempool[tx.txid];
+      // update original copy of this tx with effective fee rate & relatives data
+      mempoolTx.effectiveFeePerVsize = tx.score;
+      mempoolTx.ancestors = (Array.from(tx.ancestorMap?.values()) as AuditTransaction[]).map((a) => {
+        return {
+          txid: a.txid,
+          fee: a.fee,
+          weight: a.weight,
+        };
+      });
+      mempoolTx.bestDescendant = null;
+      mempoolTx.cpfpChecked = true;
+      transactions.push(tx);
+      tx.used = true;
+    }
+    const blockTransactions = transactions.map(t => mempool[t.txid]);
+    restOfArray.forEach(tx => {
+      blockWeight += tx.weight;
+      blockSize += tx.size;
+      tx.effectiveFeePerVsize = tx.feePerVsize;
+      tx.cpfpChecked = false;
+      tx.ancestors = [];
+      tx.bestDescendant = null;
+      blockTransactions.push(tx);
+    });
+    if (blockTransactions.length) {
+      blocks.push(dataToMempoolBlocks(blockTransactions, blockSize, blockWeight, blocks.length));
+    }
+    transactions = [];
+  } else if (transactions.length) {
+    blocks.push(dataToMempoolBlocks(transactions.map(t => mempool[t.txid]), blockSize, blockWeight, blocks.length));
+  }
+
+  const end = Date.now();
+  const time = end - start;
+  logger.debug('Mempool templates calculated in ' + time / 1000 + ' seconds');
+
+  return {
+    mempool,
+    blocks
+  };
+}
+
+// traverse in-mempool ancestors
+// recursion unavoidable, but should be limited to depth < 25 by mempool policy
+function setRelatives(
+  tx: AuditTransaction,
+  mempool: { [txid: string]: AuditTransaction },
+): void {
+  for (const parent of tx.vin) {
+    const parentTx = mempool[parent.txid];
+    if (parentTx && !tx.ancestorMap?.has(parent.txid)) {
+      tx.ancestorMap.set(parent.txid, parentTx);
+      parentTx.children.add(tx);
+      // visit each node only once
+      if (!parentTx.relativesSet) {
+        setRelatives(parentTx, mempool);
+      }
+      parentTx.ancestorMap.forEach((ancestor) => {
+        tx.ancestorMap.set(ancestor.txid, ancestor);
+      });
+    }
+  };
+  tx.ancestorFee = tx.fee || 0;
+  tx.ancestorWeight = tx.weight || 0;
+  tx.ancestorMap.forEach((ancestor) => {
+    tx.ancestorFee += ancestor.fee;
+    tx.ancestorWeight += ancestor.weight;
+  });
+  tx.score = tx.ancestorFee / ((tx.ancestorWeight / 4) || 1);
+  tx.relativesSet = true;
+}
+
+// iterate over remaining descendants, removing the root as a valid ancestor & updating the ancestor score
+// avoids recursion to limit call stack depth
+function updateDescendants(
+  rootTx: AuditTransaction,
+  mempool: { [txid: string]: AuditTransaction },
+  modified: PairingHeap<AuditTransaction>,
+): void {
+  const descendantSet: Set<AuditTransaction> = new Set();
+  // stack of nodes left to visit
+  const descendants: AuditTransaction[] = [];
+  let descendantTx;
+  let tmpScore;
+  rootTx.children.forEach(childTx => {
+    if (!descendantSet.has(childTx)) {
+      descendants.push(childTx);
+      descendantSet.add(childTx);
+    }
+  });
+  while (descendants.length) {
+    descendantTx = descendants.pop();
+    if (descendantTx && descendantTx.ancestorMap && descendantTx.ancestorMap.has(rootTx.txid)) {
+      // remove tx as ancestor
+      descendantTx.ancestorMap.delete(rootTx.txid);
+      descendantTx.ancestorFee -= rootTx.fee;
+      descendantTx.ancestorWeight -= rootTx.weight;
+      tmpScore = descendantTx.score;
+      descendantTx.score = descendantTx.ancestorFee / (descendantTx.ancestorWeight / 4);
+
+      if (!descendantTx.modifiedNode) {
+        descendantTx.modified = true;
+        descendantTx.modifiedNode = modified.add(descendantTx);
+      } else {
+        // rebalance modified heap if score has changed
+        if (descendantTx.score < tmpScore) {
+          modified.decreasePriority(descendantTx.modifiedNode);
+        } else if (descendantTx.score > tmpScore) {
+          modified.increasePriority(descendantTx.modifiedNode);
+        }
+      }
+
+      // add this node's children to the stack
+      descendantTx.children.forEach(childTx => {
+        // visit each node only once
+        if (!descendantSet.has(childTx)) {
+          descendants.push(childTx);
+          descendantSet.add(childTx);
+        }
+      });
+    }
+  }
+}
+
+function dataToMempoolBlocks(transactions: TransactionExtended[],
+  blockSize: number, blockWeight: number, blocksIndex: number): MempoolBlockWithTransactions {
+  let rangeLength = 4;
+  if (blocksIndex === 0) {
+    rangeLength = 8;
+  }
+  if (transactions.length > 4000) {
+    rangeLength = 6;
+  } else if (transactions.length > 10000) {
+    rangeLength = 8;
+  }
+  return {
+    blockSize: blockSize,
+    blockVSize: blockWeight / 4,
+    nTx: transactions.length,
+    totalFees: transactions.reduce((acc, cur) => acc + cur.fee, 0),
+    medianFee: Common.percentile(transactions.map((tx) => tx.effectiveFeePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
+    feeRange: Common.getFeesInRange(transactions, rangeLength),
+    transactionIds: transactions.map((tx) => tx.txid),
+    transactions: transactions.map((tx) => Common.stripTransaction(tx)),
+  };
+}

backend/src/api/websocket-handler.ts

@@ -1,7 +1,9 @@
 import logger from '../logger';
 import * as WebSocket from 'ws';
-import { BlockExtended, TransactionExtended, WebsocketResponse, MempoolBlock,
-  OptimizedStatistic, ILoadingIndicators, IConversionRates } from '../mempool.interfaces';
+import {
+  BlockExtended, TransactionExtended, WebsocketResponse, MempoolBlock, MempoolBlockDelta,
+  OptimizedStatistic, ILoadingIndicators, IConversionRates
+} from '../mempool.interfaces';
 import blocks from './blocks';
 import memPool from './mempool';
 import backendInfo from './backend-info';
@@ -11,6 +13,12 @@ import { Common } from './common';
 import loadingIndicators from './loading-indicators';
 import config from '../config';
 import transactionUtils from './transaction-utils';
+import rbfCache from './rbf-cache';
+import difficultyAdjustment from './difficulty-adjustment';
+import feeApi from './fee-api';
+import BlocksAuditsRepository from '../repositories/BlocksAuditsRepository';
+import BlocksSummariesRepository from '../repositories/BlocksSummariesRepository';
+import Audit from './audit';
 
 class WebsocketHandler {
   private wss: WebSocket.Server | undefined;
@@ -48,29 +56,38 @@ class WebsocketHandler {
           if (parsedMessage && parsedMessage['track-tx']) {
             if (/^[a-fA-F0-9]{64}$/.test(parsedMessage['track-tx'])) {
               client['track-tx'] = parsedMessage['track-tx'];
-              // Client is telling the transaction wasn't found but it might have appeared before we had the time to start watching for it
+              // Client is telling the transaction wasn't found
               if (parsedMessage['watch-mempool']) {
-                const tx = memPool.getMempool()[client['track-tx']];
-                if (tx) {
-                  if (config.MEMPOOL.BACKEND === 'esplora') {
-                    response['tx'] = tx;
+                const rbfCacheTx = rbfCache.get(client['track-tx']);
+                if (rbfCacheTx) {
+                  response['txReplaced'] = {
+                    txid: rbfCacheTx.txid,
+                  };
+                  client['track-tx'] = null;
+                } else {
+                  // It might have appeared before we had the time to start watching for it
+                  const tx = memPool.getMempool()[client['track-tx']];
+                  if (tx) {
+                    if (config.MEMPOOL.BACKEND === 'esplora') {
+                      response['tx'] = tx;
+                    } else {
+                      // tx.prevout is missing from transactions when in bitcoind mode
+                      try {
+                        const fullTx = await transactionUtils.$getTransactionExtended(tx.txid, true);
+                        response['tx'] = fullTx;
+                      } catch (e) {
+                        logger.debug('Error finding transaction: ' + (e instanceof Error ? e.message : e));
+                      }
+                    }
                   } else {
-                    // tx.prevouts is missing from transactions when in bitcoind mode
                     try {
-                      const fullTx = await transactionUtils.$getTransactionExtended(tx.txid, true);
+                      const fullTx = await transactionUtils.$getTransactionExtended(client['track-tx'], true);
                       response['tx'] = fullTx;
                     } catch (e) {
-                      logger.debug('Error finding transaction: ' + (e instanceof Error ? e.message : e));
+                      logger.debug('Error finding transaction. ' + (e instanceof Error ? e.message : e));
+                      client['track-mempool-tx'] = parsedMessage['track-tx'];
                     }
                   }
-                } else {
-                  try {
-                    const fullTx = await transactionUtils.$getTransactionExtended(client['track-tx'], true);
-                    response['tx'] = fullTx;
-                  } catch (e) {
-                    logger.debug('Error finding transaction. ' + (e instanceof Error ? e.message : e));
-                    client['track-mempool-tx'] = parsedMessage['track-tx'];
-                  }
                 }
               }
             } else {
@@ -99,6 +116,20 @@ class WebsocketHandler {
             }
           }
 
+          if (parsedMessage && parsedMessage['track-mempool-block'] !== undefined) {
+            if (Number.isInteger(parsedMessage['track-mempool-block']) && parsedMessage['track-mempool-block'] >= 0) {
+              const index = parsedMessage['track-mempool-block'];
+              client['track-mempool-block'] = index;
+              const mBlocksWithTransactions = mempoolBlocks.getMempoolBlocksWithTransactions();
+              response['projected-block-transactions'] = {
+                index: index,
+                blockTransactions: mBlocksWithTransactions[index]?.transactions || [],
+              };
+            } else {
+              client['track-mempool-block'] = null;
+            }
+          }
+
           if (parsedMessage.action === 'init') {
             const _blocks = blocks.getBlocks().slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT);
             if (!_blocks) {
@@ -138,7 +169,7 @@ class WebsocketHandler {
       throw new Error('WebSocket.Server is not set');
     }
 
-    this.wss.clients.forEach((client: WebSocket) => {
+    this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
@@ -153,7 +184,7 @@ class WebsocketHandler {
       throw new Error('WebSocket.Server is not set');
     }
 
-    this.wss.clients.forEach((client: WebSocket) => {
+    this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
@@ -166,7 +197,7 @@ class WebsocketHandler {
       throw new Error('WebSocket.Server is not set');
     }
 
-    this.wss.clients.forEach((client: WebSocket) => {
+    this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
@@ -181,14 +212,14 @@ class WebsocketHandler {
     return {
       'mempoolInfo': memPool.getMempoolInfo(),
       'vBytesPerSecond': memPool.getVBytesPerSecond(),
-      'lastDifficultyAdjustment': blocks.getLastDifficultyAdjustmentTime(),
-      'previousRetarget': blocks.getPreviousDifficultyRetarget(),
       'blocks': _blocks,
       'conversions': fiatConversion.getConversionRates(),
       'mempool-blocks': mempoolBlocks.getMempoolBlocks(),
       'transactions': memPool.getLatestTransactions(),
       'backendInfo': backendInfo.getBackendInfo(),
       'loadingIndicators': loadingIndicators.getLoadingIndicators(),
+      'da': difficultyAdjustment.getDifficultyAdjustment(),
+      'fees': feeApi.getRecommendedFee(),
       ...this.extraInitProperties
     };
   }
@@ -198,7 +229,7 @@ class WebsocketHandler {
       throw new Error('WebSocket.Server is not set');
     }
 
-    this.wss.clients.forEach((client: WebSocket) => {
+    this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
@@ -213,24 +244,28 @@ class WebsocketHandler {
     });
   }
 
-  handleMempoolChange(newMempool: { [txid: string]: TransactionExtended },
-    newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]) {
+  async handleMempoolChange(newMempool: { [txid: string]: TransactionExtended },
+    newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]): Promise<void> {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
-    mempoolBlocks.updateMempoolBlocks(newMempool);
+    if (config.MEMPOOL.ADVANCED_GBT_MEMPOOL) {
+      await mempoolBlocks.makeBlockTemplates(newMempool, 8, null, true);
+    } else {
+      mempoolBlocks.updateMempoolBlocks(newMempool);
+    }
+
     const mBlocks = mempoolBlocks.getMempoolBlocks();
-    const mempool = memPool.getMempool();
+    const mBlockDeltas = mempoolBlocks.getMempoolBlockDeltas();
     const mempoolInfo = memPool.getMempoolInfo();
     const vBytesPerSecond = memPool.getVBytesPerSecond();
     const rbfTransactions = Common.findRbfTransactions(newTransactions, deletedTransactions);
+    const da = difficultyAdjustment.getDifficultyAdjustment();
+    memPool.handleRbfTransactions(rbfTransactions);
+    const recommendedFees = feeApi.getRecommendedFee();
 
-    for (const rbfTransaction in rbfTransactions) {
-      delete mempool[rbfTransaction];
-    }
-
-    this.wss.clients.forEach(async (client: WebSocket) => {
+    this.wss.clients.forEach(async (client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
@@ -241,6 +276,8 @@ class WebsocketHandler {
         response['mempoolInfo'] = mempoolInfo;
         response['vBytesPerSecond'] = vBytesPerSecond;
         response['transactions'] = newTransactions.slice(0, 6).map((tx) => Common.stripTransaction(tx));
+        response['da'] = da;
+        response['fees'] = recommendedFees;
       }
 
       if (client['want-mempool-blocks']) {
@@ -331,22 +368,40 @@ class WebsocketHandler {
         }
       }
 
-      if (client['track-tx'] && rbfTransactions[client['track-tx']]) {
-        for (const rbfTransaction in rbfTransactions) {
-          if (client['track-tx'] === rbfTransaction) {
-            const rbfTx = rbfTransactions[rbfTransaction];
-            if (config.MEMPOOL.BACKEND !== 'esplora') {
-              try {
-                const fullTx = await transactionUtils.$getTransactionExtended(rbfTransaction, true);
-                response['rbfTransaction'] = fullTx;
-              } catch (e) {
-                logger.debug('Error finding transaction in mempool: ' + (e instanceof Error ? e.message : e));
-              }
-            } else {
-              response['rbfTransaction'] = rbfTx;
-            }
-            break;
+      if (client['track-tx']) {
+        const outspends: object = {};
+        newTransactions.forEach((tx) => tx.vin.forEach((vin, i) => {
+          if (vin.txid === client['track-tx']) {
+            outspends[vin.vout] = {
+              vin: i,
+              txid: tx.txid,
+            };
           }
+        }));
+
+        if (Object.keys(outspends).length) {
+          response['utxoSpent'] = outspends;
+        }
+
+        if (rbfTransactions[client['track-tx']]) {
+          for (const rbfTransaction in rbfTransactions) {
+            if (client['track-tx'] === rbfTransaction) {
+              response['rbfTransaction'] = {
+                txid: rbfTransactions[rbfTransaction].txid,
+              };
+              break;
+            }
+          }
+        }
+      }
+
+      if (client['track-mempool-block'] >= 0) {
+        const index = client['track-mempool-block'];
+        if (mBlockDeltas[index]) {
+          response['projected-block-transactions'] = {
+            index: index,
+            delta: mBlockDeltas[index],
+          };
         }
       }
 
@@ -355,32 +410,73 @@ class WebsocketHandler {
       }
     });
   }
-
-  handleNewBlock(block: BlockExtended, txIds: string[], transactions: TransactionExtended[]) {
+ 
+  async handleNewBlock(block: BlockExtended, txIds: string[], transactions: TransactionExtended[]): Promise<void> {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
-    let mBlocks: undefined | MempoolBlock[];
-    let matchRate = 0;
     const _memPool = memPool.getMempool();
-    const _mempoolBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
 
-    if (_mempoolBlocks[0]) {
-      const matches: string[] = [];
-      for (const txId of txIds) {
-        if (_mempoolBlocks[0].transactionIds.indexOf(txId) > -1) {
-          matches.push(txId);
-        }
-        delete _memPool[txId];
-      }
-
-      matchRate = Math.round((matches.length / (txIds.length - 1)) * 100);
+    if (config.MEMPOOL.ADVANCED_GBT_AUDIT) {
+      await mempoolBlocks.makeBlockTemplates(_memPool, 2);
+    } else {
       mempoolBlocks.updateMempoolBlocks(_memPool);
-      mBlocks = mempoolBlocks.getMempoolBlocks();
     }
 
-    block.matchRate = matchRate;
+    if (Common.indexingEnabled() && memPool.isInSync()) {
+      const projectedBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
+
+      const { censored, added, fresh, score } = Audit.auditBlock(transactions, projectedBlocks, _memPool);
+      const matchRate = Math.round(score * 100 * 100) / 100;
+
+      const stripped = projectedBlocks[0]?.transactions ? projectedBlocks[0].transactions.map((tx) => {
+        return {
+          txid: tx.txid,
+          vsize: tx.vsize,
+          fee: tx.fee ? Math.round(tx.fee) : 0,
+          value: tx.value,
+        };
+      }) : [];
+
+      BlocksSummariesRepository.$saveTemplate({
+        height: block.height,
+        template: {
+          id: block.id,
+          transactions: stripped
+        }
+      });
+
+      BlocksAuditsRepository.$saveAudit({
+        time: block.timestamp,
+        height: block.height,
+        hash: block.id,
+        addedTxs: added,
+        missingTxs: censored,
+        freshTxs: fresh,
+        matchRate: matchRate,
+      });
+
+      if (block.extras) {
+        block.extras.matchRate = matchRate;
+      }
+    }
+
+    // Update mempool to remove transactions included in the new block
+    for (const txId of txIds) {
+      delete _memPool[txId];
+    }
+
+    if (config.MEMPOOL.ADVANCED_GBT_MEMPOOL) {
+      await mempoolBlocks.makeBlockTemplates(_memPool, 8, null, true);
+    } else {
+      mempoolBlocks.updateMempoolBlocks(_memPool);
+    }
+    const mBlocks = mempoolBlocks.getMempoolBlocks();
+    const mBlockDeltas = mempoolBlocks.getMempoolBlockDeltas();
+
+    const da = difficultyAdjustment.getDifficultyAdjustment();
+    const fees = feeApi.getRecommendedFee();
 
     this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
@@ -394,8 +490,8 @@ class WebsocketHandler {
       const response = {
         'block': block,
         'mempoolInfo': memPool.getMempoolInfo(),
-        'lastDifficultyAdjustment': blocks.getLastDifficultyAdjustmentTime(),
-        'previousRetarget': blocks.getPreviousDifficultyRetarget(),
+        'da': da,
+        'fees': fees,
       };
 
       if (mBlocks && client['want-mempool-blocks']) {
@@ -403,7 +499,6 @@ class WebsocketHandler {
       }
 
       if (client['track-tx'] && txIds.indexOf(client['track-tx']) > -1) {
-        client['track-tx'] = null;
         response['txConfirmed'] = true;
       }
 
@@ -471,6 +566,16 @@ class WebsocketHandler {
         }
       }
 
+      if (client['track-mempool-block'] >= 0) {
+        const index = client['track-mempool-block'];
+        if (mBlockDeltas && mBlockDeltas[index]) {
+          response['projected-block-transactions'] = {
+            index: index,
+            delta: mBlockDeltas[index],
+          };
+        }
+      }
+
       client.send(JSON.stringify(response));
     });
   }

backend/src/config.ts

@@ -1,8 +1,11 @@
-const configFile = require('../mempool-config.json');
+const configFromFile = require(
+    process.env.MEMPOOL_CONFIG_FILE ? process.env.MEMPOOL_CONFIG_FILE : '../mempool-config.json'
+);
 
 interface IConfig {
   MEMPOOL: {
-    NETWORK: 'mainnet' | 'testnet' | 'signet' | 'liquid';
+    ENABLED: boolean;
+    NETWORK: 'mainnet' | 'testnet' | 'signet' | 'liquid' | 'liquidtestnet';
     BACKEND: 'esplora' | 'electrum' | 'none';
     HTTP_PORT: number;
     SPAWN_CLUSTER_PROCS: number;
@@ -14,13 +17,43 @@ interface IConfig {
     BLOCK_WEIGHT_UNITS: number;
     INITIAL_BLOCKS_AMOUNT: number;
     MEMPOOL_BLOCKS_AMOUNT: number;
+    INDEXING_BLOCKS_AMOUNT: number;
+    BLOCKS_SUMMARIES_INDEXING: boolean;
     PRICE_FEED_UPDATE_INTERVAL: number;
     USE_SECOND_NODE_FOR_MINFEE: boolean;
     EXTERNAL_ASSETS: string[];
+    EXTERNAL_MAX_RETRY: number;
+    EXTERNAL_RETRY_INTERVAL: number;
+    USER_AGENT: string;
+    STDOUT_LOG_MIN_PRIORITY: 'emerg' | 'alert' | 'crit' | 'err' | 'warn' | 'notice' | 'info' | 'debug';
+    AUTOMATIC_BLOCK_REINDEXING: boolean;
+    POOLS_JSON_URL: string,
+    POOLS_JSON_TREE_URL: string,
+    ADVANCED_GBT_AUDIT: boolean;
+    ADVANCED_GBT_MEMPOOL: boolean;
+    TRANSACTION_INDEXING: boolean;
   };
   ESPLORA: {
     REST_API_URL: string;
   };
+  LIGHTNING: {
+    ENABLED: boolean;
+    BACKEND: 'lnd' | 'cln' | 'ldk';
+    TOPOLOGY_FOLDER: string;
+    STATS_REFRESH_INTERVAL: number;
+    GRAPH_REFRESH_INTERVAL: number;
+    LOGGER_UPDATE_INTERVAL: number;
+    FORENSICS_INTERVAL: number;
+    FORENSICS_RATE_LIMIT: number;
+  };
+  LND: {
+    TLS_CERT_PATH: string;
+    MACAROON_PATH: string;
+    REST_API_URL: string;
+  };
+  CLIGHTNING: {
+    SOCKET: string;
+  };
   ELECTRUM: {
     HOST: string;
     PORT: number;
@@ -41,6 +74,7 @@ interface IConfig {
   DATABASE: {
     ENABLED: boolean;
     HOST: string,
+    SOCKET: string,
     PORT: number;
     DATABASE: string;
     USERNAME: string;
@@ -50,7 +84,7 @@ interface IConfig {
     ENABLED: boolean;
     HOST: string;
     PORT: number;
-    MIN_PRIORITY: 'emerg' | 'alert' | 'crit' | 'err' |'warn' | 'notice' | 'info' | 'debug';
+    MIN_PRIORITY: 'emerg' | 'alert' | 'crit' | 'err' | 'warn' | 'notice' | 'info' | 'debug';
     FACILITY: string;
   };
   STATISTICS: {
@@ -61,10 +95,37 @@ interface IConfig {
     ENABLED: boolean;
     DATA_PATH: string;
   };
+  SOCKS5PROXY: {
+    ENABLED: boolean;
+    USE_ONION: boolean;
+    HOST: string;
+    PORT: number;
+    USERNAME: string;
+    PASSWORD: string;
+  };
+  PRICE_DATA_SERVER: {
+    TOR_URL: string;
+    CLEARNET_URL: string;
+  };
+  EXTERNAL_DATA_SERVER: {
+    MEMPOOL_API: string;
+    MEMPOOL_ONION: string;
+    LIQUID_API: string;
+    LIQUID_ONION: string;
+    BISQ_URL: string;
+    BISQ_ONION: string;
+  };
+  MAXMIND: {
+    ENABLED: boolean;
+    GEOLITE2_CITY: string;
+    GEOLITE2_ASN: string;
+    GEOIP2_ISP: string;
+  },
 }
 
 const defaults: IConfig = {
   'MEMPOOL': {
+    'ENABLED': true,
     'NETWORK': 'mainnet',
     'BACKEND': 'none',
     'HTTP_PORT': 8999,
@@ -77,9 +138,21 @@ const defaults: IConfig = {
     'BLOCK_WEIGHT_UNITS': 4000000,
     'INITIAL_BLOCKS_AMOUNT': 8,
     'MEMPOOL_BLOCKS_AMOUNT': 8,
-    'PRICE_FEED_UPDATE_INTERVAL': 3600,
+    'INDEXING_BLOCKS_AMOUNT': 11000, // 0 = disable indexing, -1 = index all blocks
+    'BLOCKS_SUMMARIES_INDEXING': false,
+    'PRICE_FEED_UPDATE_INTERVAL': 600,
     'USE_SECOND_NODE_FOR_MINFEE': false,
     'EXTERNAL_ASSETS': [],
+    'EXTERNAL_MAX_RETRY': 1,
+    'EXTERNAL_RETRY_INTERVAL': 0,
+    'USER_AGENT': 'mempool',
+    'STDOUT_LOG_MIN_PRIORITY': 'debug',
+    'AUTOMATIC_BLOCK_REINDEXING': false,
+    'POOLS_JSON_URL': 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools.json',
+    'POOLS_JSON_TREE_URL': 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
+    'ADVANCED_GBT_AUDIT': false,
+    'ADVANCED_GBT_MEMPOOL': false,
+    'TRANSACTION_INDEXING': false,
   },
   'ESPLORA': {
     'REST_API_URL': 'http://127.0.0.1:3000',
@@ -104,6 +177,7 @@ const defaults: IConfig = {
   'DATABASE': {
     'ENABLED': true,
     'HOST': '127.0.0.1',
+    'SOCKET': '',
     'PORT': 3306,
     'DATABASE': 'mempool',
     'USERNAME': 'mempool',
@@ -124,6 +198,50 @@ const defaults: IConfig = {
     'ENABLED': false,
     'DATA_PATH': '/bisq/statsnode-data/btc_mainnet/db'
   },
+  'LIGHTNING': {
+    'ENABLED': false,
+    'BACKEND': 'lnd',
+    'TOPOLOGY_FOLDER': '',
+    'STATS_REFRESH_INTERVAL': 600,
+    'GRAPH_REFRESH_INTERVAL': 600,
+    'LOGGER_UPDATE_INTERVAL': 30,
+    'FORENSICS_INTERVAL': 43200,
+    'FORENSICS_RATE_LIMIT': 20,
+  },
+  'LND': {
+    'TLS_CERT_PATH': '',
+    'MACAROON_PATH': '',
+    'REST_API_URL': 'https://localhost:8080',
+  },
+  'CLIGHTNING': {
+    'SOCKET': '',
+  },
+  'SOCKS5PROXY': {
+    'ENABLED': false,
+    'USE_ONION': true,
+    'HOST': '127.0.0.1',
+    'PORT': 9050,
+    'USERNAME': '',
+    'PASSWORD': ''
+  },
+  'PRICE_DATA_SERVER': {
+    'TOR_URL': 'http://wizpriceje6q5tdrxkyiazsgu7irquiqjy2dptezqhrtu7l2qelqktid.onion/getAllMarketPrices',
+    'CLEARNET_URL': 'https://price.bisq.wiz.biz/getAllMarketPrices'
+  },
+  'EXTERNAL_DATA_SERVER': {
+    'MEMPOOL_API': 'https://mempool.space/api/v1',
+    'MEMPOOL_ONION': 'http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/api/v1',
+    'LIQUID_API': 'https://liquid.network/api/v1',
+    'LIQUID_ONION': 'http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1',
+    'BISQ_URL': 'https://bisq.markets/api',
+    'BISQ_ONION': 'http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api'
+  },
+  'MAXMIND': {
+    'ENABLED': false,
+    'GEOLITE2_CITY': '/usr/local/share/GeoIP/GeoLite2-City.mmdb',
+    'GEOLITE2_ASN': '/usr/local/share/GeoIP/GeoLite2-ASN.mmdb',
+    'GEOIP2_ISP': '/usr/local/share/GeoIP/GeoIP2-ISP.mmdb'
+  },
 };
 
 class Config implements IConfig {
@@ -136,9 +254,16 @@ class Config implements IConfig {
   SYSLOG: IConfig['SYSLOG'];
   STATISTICS: IConfig['STATISTICS'];
   BISQ: IConfig['BISQ'];
+  LIGHTNING: IConfig['LIGHTNING'];
+  LND: IConfig['LND'];
+  CLIGHTNING: IConfig['CLIGHTNING'];
+  SOCKS5PROXY: IConfig['SOCKS5PROXY'];
+  PRICE_DATA_SERVER: IConfig['PRICE_DATA_SERVER'];
+  EXTERNAL_DATA_SERVER: IConfig['EXTERNAL_DATA_SERVER'];
+  MAXMIND: IConfig['MAXMIND'];
 
   constructor() {
-    const configs = this.merge(configFile, defaults);
+    const configs = this.merge(configFromFile, defaults);
     this.MEMPOOL = configs.MEMPOOL;
     this.ESPLORA = configs.ESPLORA;
     this.ELECTRUM = configs.ELECTRUM;
@@ -148,6 +273,13 @@ class Config implements IConfig {
     this.SYSLOG = configs.SYSLOG;
     this.STATISTICS = configs.STATISTICS;
     this.BISQ = configs.BISQ;
+    this.LIGHTNING = configs.LIGHTNING;
+    this.LND = configs.LND;
+    this.CLIGHTNING = configs.CLIGHTNING;
+    this.SOCKS5PROXY = configs.SOCKS5PROXY;
+    this.PRICE_DATA_SERVER = configs.PRICE_DATA_SERVER;
+    this.EXTERNAL_DATA_SERVER = configs.EXTERNAL_DATA_SERVER;
+    this.MAXMIND = configs.MAXMIND;
   }
 
   merge = (...objects: object[]): IConfig => {

backend/src/database.ts

@@ -1,26 +1,61 @@
 import config from './config';
-import { createPool } from 'mysql2/promise';
+import { createPool, Pool, PoolConnection } from 'mysql2/promise';
 import logger from './logger';
+import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } from 'mysql2/typings/mysql';
 
-export class DB {
-  static pool = createPool({
-    host: config.DATABASE.HOST,
+ class DB {
+  constructor() {
+    if (config.DATABASE.SOCKET !== '') {
+      this.poolConfig.socketPath = config.DATABASE.SOCKET;
+    } else {
+      this.poolConfig.host = config.DATABASE.HOST;
+    }
+  }
+  private pool: Pool | null = null;
+  private poolConfig: PoolOptions = {
     port: config.DATABASE.PORT,
     database: config.DATABASE.DATABASE,
     user: config.DATABASE.USERNAME,
     password: config.DATABASE.PASSWORD,
     connectionLimit: 10,
     supportBigNumbers: true,
-  });
-}
+    timezone: '+00:00',
+  };
 
-export async function checkDbConnection() {
-  try {
-    const connection = await DB.pool.getConnection();
-    logger.info('Database connection established.');
-    connection.release();
-  } catch (e) {
-    logger.err('Could not connect to database: ' + (e instanceof Error ? e.message : e));
-    process.exit(1);
+  private checkDBFlag() {
+    if (config.DATABASE.ENABLED === false) {
+      logger.err('Trying to use DB feature but config.DATABASE.ENABLED is set to false, please open an issue');
+    }
+  }
+
+  public async query<T extends RowDataPacket[][] | RowDataPacket[] | OkPacket |
+    OkPacket[] | ResultSetHeader>(query, params?): Promise<[T, FieldPacket[]]>
+  {
+    this.checkDBFlag();
+    const pool = await this.getPool();
+    return pool.query(query, params);
+  }
+
+  public async checkDbConnection() {
+    this.checkDBFlag();
+    try {
+      await this.query('SELECT ?', [1]);
+      logger.info('Database connection established.');
+    } catch (e) {
+      logger.err('Could not connect to database: ' + (e instanceof Error ? e.message : e));
+      process.exit(1);
+    }
+  }
+
+  private async getPool(): Promise<Pool> {
+    if (this.pool === null) {
+      this.pool = createPool(this.poolConfig);
+      this.pool.on('connection', function (newConnection: PoolConnection) {
+        newConnection.query(`SET time_zone='+00:00'`);
+      });
+    }
+    return this.pool;
   }
 }
+
+export default new DB();

backend/src/index.ts

@@ -1,17 +1,14 @@
-import { Express, Request, Response, NextFunction } from 'express';
-import * as express from 'express';
+import express from 'express';
+import { Application, Request, Response, NextFunction } from 'express';
 import * as http from 'http';
 import * as WebSocket from 'ws';
-import * as cluster from 'cluster';
-import axios from 'axios';
-
-import { checkDbConnection } from './database';
+import cluster from 'cluster';
+import DB from './database';
 import config from './config';
-import routes from './routes';
 import blocks from './api/blocks';
 import memPool from './api/mempool';
 import diskCache from './api/disk-cache';
-import statistics from './api/statistics';
+import statistics from './api/statistics/statistics';
 import websocketHandler from './api/websocket-handler';
 import fiatConversion from './api/fiat-conversion';
 import bisq from './api/bisq/bisq';
@@ -24,11 +21,26 @@ import elementsParser from './api/liquid/elements-parser';
 import databaseMigration from './api/database-migration';
 import syncAssets from './sync-assets';
 import icons from './api/liquid/icons';
+import { Common } from './api/common';
+import poolsUpdater from './tasks/pools-updater';
+import indexer from './indexer';
+import nodesRoutes from './api/explorer/nodes.routes';
+import channelsRoutes from './api/explorer/channels.routes';
+import generalLightningRoutes from './api/explorer/general.routes';
+import lightningStatsUpdater from './tasks/lightning/stats-updater.service';
+import networkSyncService from './tasks/lightning/network-sync.service';
+import statisticsRoutes from './api/statistics/statistics.routes';
+import miningRoutes from './api/mining/mining-routes';
+import bisqRoutes from './api/bisq/bisq.routes';
+import liquidRoutes from './api/liquid/liquid.routes';
+import bitcoinRoutes from './api/bitcoin/bitcoin.routes';
+import fundingTxFetcher from './tasks/lightning/sync-tasks/funding-tx-fetcher';
+import forensicsService from './tasks/lightning/forensics.service';
 
 class Server {
   private wss: WebSocket.Server | undefined;
   private server: http.Server | undefined;
-  private app: Express;
+  private app: Application;
   private currentBackendRetryInterval = 5;
 
   constructor() {
@@ -39,7 +51,7 @@ class Server {
       return;
     }
 
-    if (cluster.isMaster) {
+    if (cluster.isPrimary) {
       logger.notice(`Mempool Server (Master) is running on port ${config.MEMPOOL.HTTP_PORT} (${backendInfo.getShortCommitHash()})`);
 
       const numCPUs = config.MEMPOOL.SPAWN_CLUSTER_PROCS;
@@ -63,8 +75,8 @@ class Server {
     }
   }
 
-  async startServer(worker = false) {
-    logger.debug(`Starting Mempool Server${worker ? ' (worker)' : ''}... (${backendInfo.getShortCommitHash()})`);
+  async startServer(worker = false): Promise<void> {
+    logger.notice(`Starting Mempool Server${worker ? ' (worker)' : ''}... (${backendInfo.getShortCommitHash()})`);
 
     this.app
       .use((req: Request, res: Response, next: NextFunction) => {
@@ -72,38 +84,56 @@ class Server {
         next();
       })
       .use(express.urlencoded({ extended: true }))
-      .use(express.text())
-    ;
+      .use(express.text({ type: ['text/plain', 'application/base64'] }))
+      ;
 
     this.server = http.createServer(this.app);
     this.wss = new WebSocket.Server({ server: this.server });
 
     this.setUpWebsocketHandling();
 
-    await syncAssets.syncAssets();
-    diskCache.loadMempoolCache();
+    await syncAssets.syncAssets$();
+    if (config.MEMPOOL.ENABLED) {
+      diskCache.loadMempoolCache();
+    }
 
     if (config.DATABASE.ENABLED) {
-      await checkDbConnection();
+      await DB.checkDbConnection();
       try {
+        if (process.env.npm_config_reindex !== undefined) { // Re-index requests
+          const tables = process.env.npm_config_reindex.split(',');
+          logger.warn(`Indexed data for "${process.env.npm_config_reindex}" tables will be erased in 5 seconds (using '--reindex')`);
+          await Common.sleep$(5000);
+          await databaseMigration.$truncateIndexedData(tables);
+        }
         await databaseMigration.$initializeOrMigrateDatabase();
+        if (Common.indexingEnabled()) {
+          await indexer.$resetHashratesIndexingState();
+        }
       } catch (e) {
         throw new Error(e instanceof Error ? e.message : 'Error');
       }
     }
 
-    if (config.STATISTICS.ENABLED && config.DATABASE.ENABLED && cluster.isMaster) {
+    if (config.STATISTICS.ENABLED && config.DATABASE.ENABLED && cluster.isPrimary) {
       statistics.startStatistics();
     }
 
-    if (config.MEMPOOL.NETWORK === 'liquid') {
-      icons.loadIcons();
+    if (Common.isLiquid()) {
+      try {
+        icons.loadIcons();
+      } catch (e) {
+        logger.err('Cannot load liquid icons. Ignoring. Reason: ' + (e instanceof Error ? e.message : e));
+      }
     }
 
     fiatConversion.startService();
 
     this.setUpHttpApiRoutes();
-    this.runMainUpdateLoop();
+
+    if (config.MEMPOOL.ENABLED) {
+      this.runMainUpdateLoop();
+    }
 
     if (config.BISQ.ENABLED) {
       bisq.startBisqService();
@@ -112,6 +142,10 @@ class Server {
       bisqMarkets.startBisqService();
     }
 
+    if (config.LIGHTNING.ENABLED) {
+      this.$runLightningBackend();
+    }
+
     this.server.listen(config.MEMPOOL.HTTP_PORT, () => {
       if (worker) {
         logger.info(`Mempool Server worker #${process.pid} started`);
@@ -121,7 +155,7 @@ class Server {
     });
   }
 
-  async runMainUpdateLoop() {
+  async runMainUpdateLoop(): Promise<void> {
     try {
       try {
         await memPool.$updateMemPoolInfo();
@@ -133,8 +167,11 @@ class Server {
           logger.debug(msg);
         }
       }
+      await poolsUpdater.updatePoolsJson();
       await blocks.$updateBlocks();
       await memPool.$updateMempool();
+      indexer.$run();
+
       setTimeout(this.runMainUpdateLoop.bind(this), config.MEMPOOL.POLL_RATE_MS);
       this.currentBackendRetryInterval = 5;
     } catch (e) {
@@ -152,11 +189,24 @@ class Server {
     }
   }
 
-  setUpWebsocketHandling() {
+  async $runLightningBackend(): Promise<void> {
+    try {
+      await fundingTxFetcher.$init();
+      await networkSyncService.$startService();
+      await forensicsService.$startService();
+      await lightningStatsUpdater.$startService();
+    } catch(e) {
+      logger.err(`Nodejs lightning backend crashed. Restarting in 1 minute. Reason: ${(e instanceof Error ? e.message : e)}`);
+      await Common.sleep$(1000 * 60);
+      this.$runLightningBackend();
+    };
+}
+
+  setUpWebsocketHandling(): void {
     if (this.wss) {
       websocketHandler.setWebsocketServer(this.wss);
     }
-    if (config.MEMPOOL.NETWORK === 'liquid' && config.DATABASE.ENABLED) {
+    if (Common.isLiquid() && config.DATABASE.ENABLED) {
       blocks.setNewBlockCallback(async () => {
         try {
           await elementsParser.$parse();
@@ -166,136 +216,35 @@ class Server {
       });
     }
     websocketHandler.setupConnectionHandling();
-    statistics.setNewStatisticsEntryCallback(websocketHandler.handleNewStatistic.bind(websocketHandler));
-    blocks.setNewBlockCallback(websocketHandler.handleNewBlock.bind(websocketHandler));
-    memPool.setMempoolChangedCallback(websocketHandler.handleMempoolChange.bind(websocketHandler));
+    if (config.MEMPOOL.ENABLED) {
+      statistics.setNewStatisticsEntryCallback(websocketHandler.handleNewStatistic.bind(websocketHandler));
+      memPool.setAsyncMempoolChangedCallback(websocketHandler.handleMempoolChange.bind(websocketHandler));
+      blocks.setNewAsyncBlockCallback(websocketHandler.handleNewBlock.bind(websocketHandler));
+    }
     fiatConversion.setProgressChangedCallback(websocketHandler.handleNewConversionRates.bind(websocketHandler));
     loadingIndicators.setProgressChangedCallback(websocketHandler.handleLoadingChanged.bind(websocketHandler));
   }
-
-  setUpHttpApiRoutes() {
-    this.app
-      .get(config.MEMPOOL.API_URL_PREFIX + 'transaction-times', routes.getTransactionTimes)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'cpfp/:txId', routes.getCpfpInfo)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'difficulty-adjustment', routes.getDifficultyChange)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'fees/recommended', routes.getRecommendedFees)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'fees/mempool-blocks', routes.getMempoolBlocks)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'backend-info', routes.getBackendInfo)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'init-data', routes.getInitData)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'validate-address/:address', routes.validateAddress)
-      .post(config.MEMPOOL.API_URL_PREFIX + 'tx/push', routes.$postTransactionForm)
-      .get(config.MEMPOOL.API_URL_PREFIX + 'donations', async (req, res) => {
-        try {
-          const response = await axios.get('https://mempool.space/api/v1/donations', { responseType: 'stream', timeout: 10000 });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'donations/images/:id', async (req, res) => {
-        try {
-          const response = await axios.get('https://mempool.space/api/v1/donations/images/' + req.params.id, {
-            responseType: 'stream', timeout: 10000
-          });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors', async (req, res) => {
-        try {
-          const response = await axios.get('https://mempool.space/api/v1/contributors', { responseType: 'stream', timeout: 10000 });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-      .get(config.MEMPOOL.API_URL_PREFIX + 'contributors/images/:id', async (req, res) => {
-        try {
-          const response = await axios.get('https://mempool.space/api/v1/contributors/images/' + req.params.id, {
-            responseType: 'stream', timeout: 10000
-          });
-          response.data.pipe(res);
-        } catch (e) {
-          res.status(500).end();
-        }
-      })
-    ;
-
-    if (config.STATISTICS.ENABLED && config.DATABASE.ENABLED) {
-      this.app
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/2h', routes.get2HStatistics)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/24h', routes.get24HStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/1w', routes.get1WHStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/1m', routes.get1MStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/3m', routes.get3MStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/6m', routes.get6MStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/1y', routes.get1YStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/2y', routes.get2YStatistics.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/3y', routes.get3YStatistics.bind(routes))
-        ;
+  
+  setUpHttpApiRoutes(): void {
+    bitcoinRoutes.initRoutes(this.app);
+    if (config.STATISTICS.ENABLED && config.DATABASE.ENABLED && config.MEMPOOL.ENABLED) {
+      statisticsRoutes.initRoutes(this.app);
+    }
+    if (Common.indexingEnabled() && config.MEMPOOL.ENABLED) {
+      miningRoutes.initRoutes(this.app);
     }
-
     if (config.BISQ.ENABLED) {
-      this.app
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/stats', routes.getBisqStats)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/tx/:txId', routes.getBisqTransaction)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/block/:hash', routes.getBisqBlock)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/blocks/tip/height', routes.getBisqTip)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/blocks/:index/:length', routes.getBisqBlocks)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/address/:address', routes.getBisqAddress)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/txs/:index/:length', routes.getBisqTransactions)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/currencies', routes.getBisqMarketCurrencies.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/depth', routes.getBisqMarketDepth.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/hloc', routes.getBisqMarketHloc.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/markets', routes.getBisqMarketMarkets.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/offers', routes.getBisqMarketOffers.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/ticker', routes.getBisqMarketTicker.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/trades', routes.getBisqMarketTrades.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/volumes', routes.getBisqMarketVolumes.bind(routes))
-        .get(config.MEMPOOL.API_URL_PREFIX + 'bisq/markets/volumes/7d', routes.getBisqMarketVolumes7d.bind(routes))
-        ;
+      bisqRoutes.initRoutes(this.app);
     }
-
-    if (config.MEMPOOL.BACKEND !== 'esplora') {
-      this.app
-        .get(config.MEMPOOL.API_URL_PREFIX + 'mempool', routes.getMempool)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'mempool/txids', routes.getMempoolTxIds)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'mempool/recent', routes.getRecentMempoolTransactions)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId', routes.getTransaction)
-        .post(config.MEMPOOL.API_URL_PREFIX + 'tx', routes.$postTransaction)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/hex', routes.getRawTransaction)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/status', routes.getTransactionStatus)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/outspends', routes.getTransactionOutspends)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash', routes.getBlock)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/header', routes.getBlockHeader)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'blocks', routes.getBlocks)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/:height', routes.getBlocks)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/height', routes.getBlockTipHeight)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/txs', routes.getBlockTransactions)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/txs/:index', routes.getBlockTransactions)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/txids', routes.getTxIdsForBlock)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'block-height/:height', routes.getBlockHeight)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address', routes.getAddress)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address/txs', routes.getAddressTransactions)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'address/:address/txs/chain/:txId', routes.getAddressTransactions)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'address-prefix/:prefix', routes.getAddressPrefix)
-      ;
+    if (Common.isLiquid()) {
+      liquidRoutes.initRoutes(this.app);
     }
-
-    if (config.MEMPOOL.NETWORK === 'liquid') {
-      this.app
-        .get(config.MEMPOOL.API_URL_PREFIX + 'assets/icons', routes.getAllLiquidIcon)
-        .get(config.MEMPOOL.API_URL_PREFIX + 'asset/:assetId/icon', routes.getLiquidIcon)
-      ;
-    }
-
-    if (config.MEMPOOL.NETWORK === 'liquid' && config.DATABASE.ENABLED) {
-      this.app
-        .get(config.MEMPOOL.API_URL_PREFIX + 'liquid/pegs/month', routes.$getElementsPegsByMonth)
-      ;
+    if (config.LIGHTNING.ENABLED) {
+      generalLightningRoutes.initRoutes(this.app);
+      nodesRoutes.initRoutes(this.app);
+      channelsRoutes.initRoutes(this.app);
     }
   }
 }
 
-const server = new Server();
+((): Server => new Server())();

backend/src/indexer.ts

@@ -0,0 +1,107 @@
+import { Common } from './api/common';
+import blocks from './api/blocks';
+import mempool from './api/mempool';
+import mining from './api/mining/mining';
+import logger from './logger';
+import HashratesRepository from './repositories/HashratesRepository';
+import bitcoinClient from './api/bitcoin/bitcoin-client';
+import priceUpdater from './tasks/price-updater';
+import PricesRepository from './repositories/PricesRepository';
+
+class Indexer {
+  runIndexer = true;
+  indexerRunning = false;
+  tasksRunning: string[] = [];
+
+  public reindex() {
+    if (Common.indexingEnabled()) {
+      this.runIndexer = true;
+    }
+  }
+
+  public async runSingleTask(task: 'blocksPrices') {
+    if (!Common.indexingEnabled()) {
+      return;
+    }
+
+    if (task === 'blocksPrices' && !this.tasksRunning.includes(task)) {
+      this.tasksRunning.push(task);
+      const lastestPriceId = await PricesRepository.$getLatestPriceId();
+      if (priceUpdater.historyInserted === false || lastestPriceId === null) {
+        logger.debug(`Blocks prices indexer is waiting for the price updater to complete`)
+        setTimeout(() => {
+          this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask != task)
+          this.runSingleTask('blocksPrices');
+        }, 10000);
+      } else {
+        logger.debug(`Blocks prices indexer will run now`)
+        await mining.$indexBlockPrices();
+        this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask != task)
+      }
+    }
+  }
+
+  public async $run() {
+    if (!Common.indexingEnabled() || this.runIndexer === false ||
+      this.indexerRunning === true || mempool.hasPriority()
+    ) {
+      return;
+    }
+
+    // Do not attempt to index anything unless Bitcoin Core is fully synced
+    const blockchainInfo = await bitcoinClient.getBlockchainInfo();
+    if (blockchainInfo.blocks !== blockchainInfo.headers) {
+      return;
+    }
+
+    this.runIndexer = false;
+    this.indexerRunning = true;
+
+    logger.debug(`Running mining indexer`);
+
+    try {
+      await priceUpdater.$run();
+
+      const chainValid = await blocks.$generateBlockDatabase();
+      if (chainValid === false) {
+        // Chain of block hash was invalid, so we need to reindex. Stop here and continue at the next iteration
+        logger.warn(`The chain of block hash is invalid, re-indexing invalid data in 10 seconds.`);
+        setTimeout(() => this.reindex(), 10000);
+        this.indexerRunning = false;
+        return;
+      }
+
+      this.runSingleTask('blocksPrices');
+      await mining.$indexDifficultyAdjustments();
+      await this.$resetHashratesIndexingState(); // TODO - Remove this as it's not efficient
+      await mining.$generateNetworkHashrateHistory();
+      await mining.$generatePoolHashrateHistory();
+      await blocks.$generateBlocksSummariesDatabase();
+      await blocks.$generateCPFPDatabase();
+    } catch (e) {
+      this.indexerRunning = false;
+      logger.err(`Indexer failed, trying again in 10 seconds. Reason: ` + (e instanceof Error ? e.message : e));
+      setTimeout(() => this.reindex(), 10000);
+      this.indexerRunning = false;
+      return;
+    }
+
+    this.indexerRunning = false;
+
+    const runEvery = 1000 * 3600; // 1 hour
+    logger.debug(`Indexing completed. Next run planned at ${new Date(new Date().getTime() + runEvery).toUTCString()}`);
+    setTimeout(() => this.reindex(), runEvery);
+  }
+
+  async $resetHashratesIndexingState() {
+    try {
+      await HashratesRepository.$setLatestRun('last_hashrates_indexing', 0);
+      await HashratesRepository.$setLatestRun('last_weekly_hashrates_indexing', 0);
+    } catch (e) {
+      logger.err(`Cannot reset hashrate indexing timestamps. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+}
+
+export default new Indexer();

backend/src/logger.ts

@@ -73,6 +73,9 @@ class Logger {
   }
 
   private getNetwork(): string {
+    if (config.LIGHTNING.ENABLED) {
+      return config.MEMPOOL.NETWORK === 'mainnet' ? 'lightning' : `${config.MEMPOOL.NETWORK}-lightning`; 
+    }
     if (config.BISQ.ENABLED) {
       return 'bisq';
     }
@@ -97,6 +100,9 @@ class Logger {
       syslogmsg = `<${(Logger.facilities[config.SYSLOG.FACILITY] * 8 + prionum)}> ${this.name}[${process.pid}]: ${priority.toUpperCase()}${network} ${msg}`;
       this.syslog(syslogmsg);
     }
+    if (Logger.priorities[priority] > Logger.priorities[config.MEMPOOL.STDOUT_LOG_MIN_PRIORITY]) {
+      return;
+    }
     if (priority === 'warning') {
       priority = 'warn';
     }

backend/src/mempool.interfaces.ts

@@ -1,4 +1,42 @@
 import { IEsploraApi } from './api/bitcoin/esplora-api.interface';
+import { HeapNode } from "./utils/pairing-heap";
+
+export interface PoolTag {
+  id: number; // mysql row id
+  name: string;
+  link: string;
+  regexes: string; // JSON array
+  addresses: string; // JSON array
+  slug: string;
+}
+
+export interface PoolInfo {
+  poolId: number; // mysql row id
+  name: string;
+  link: string;
+  blockCount: number;
+  slug: string;
+}
+
+export interface PoolStats extends PoolInfo {
+  rank: number;
+  emptyBlocks: number;
+}
+
+export interface BlockAudit {
+  time: number,
+  height: number,
+  hash: string,
+  missingTxs: string[],
+  freshTxs: string[],
+  addedTxs: string[],
+  matchRate: number,
+}
+
+export interface AuditScore {
+  hash: string,
+  matchRate?: number,
+}
 
 export interface MempoolBlock {
   blockSize: number;
@@ -11,6 +49,12 @@ export interface MempoolBlock {
 
 export interface MempoolBlockWithTransactions extends MempoolBlock {
   transactionIds: string[];
+  transactions: TransactionStripped[];
+}
+
+export interface MempoolBlockDelta {
+  added: TransactionStripped[];
+  removed: string[];
 }
 
 interface VinStrippedToScriptsig {
@@ -28,17 +72,46 @@ export interface TransactionExtended extends IEsploraApi.Transaction {
   firstSeen?: number;
   effectiveFeePerVsize: number;
   ancestors?: Ancestor[];
+  descendants?: Ancestor[];
   bestDescendant?: BestDescendant | null;
   cpfpChecked?: boolean;
   deleteAfter?: number;
 }
 
-interface Ancestor {
+export interface AuditTransaction {
+  txid: string;
+  fee: number;
+  size: number;
+  weight: number;
+  feePerVsize: number;
+  vin: IEsploraApi.Vin[];
+  relativesSet: boolean;
+  ancestorMap: Map<string, AuditTransaction>;
+  children: Set<AuditTransaction>;
+  ancestorFee: number;
+  ancestorWeight: number;
+  score: number;
+  used: boolean;
+  modified: boolean;
+  modifiedNode: HeapNode<AuditTransaction>;
+}
+
+export interface Ancestor {
   txid: string;
   weight: number;
   fee: number;
 }
 
+export interface TransactionSet {
+  fee: number;
+  weight: number;
+  score: number;
+  children?: Set<string>;
+  available?: boolean;
+  modified?: boolean;
+  modifiedNode?: HeapNode<string>;
+}
+
 interface BestDescendant {
   txid: string;
   weight: number;
@@ -47,7 +120,9 @@ interface BestDescendant {
 
 export interface CpfpInfo {
   ancestors: Ancestor[];
-  bestDescendant: BestDescendant | null;
+  bestDescendant?: BestDescendant | null;
+  descendants?: Ancestor[];
+  effectiveFeePerVsize?: number;
 }
 
 export interface TransactionStripped {
@@ -56,12 +131,37 @@ export interface TransactionStripped {
   vsize: number;
   value: number;
 }
-export interface BlockExtended extends IEsploraApi.Block {
+
+export interface BlockExtension {
+  totalFees?: number;
   medianFee?: number;
   feeRange?: number[];
   reward?: number;
   coinbaseTx?: TransactionMinerInfo;
   matchRate?: number;
+  pool?: {
+    id: number;
+    name: string;
+    slug: string;
+  };
+  avgFee?: number;
+  avgFeeRate?: number;
+  coinbaseRaw?: string;
+  usd?: number | null;
+}
+
+export interface BlockExtended extends IEsploraApi.Block {
+  extras: BlockExtension;
+}
+
+export interface BlockSummary {
+  id: string;
+  transactions: TransactionStripped[];
+}
+
+export interface BlockPrice {
+  height: number;
+  priceId: number;
 }
 
 export interface TransactionMinerInfo {
@@ -128,10 +228,7 @@ export interface Statistic {
 }
 
 export interface OptimizedStatistic {
-  id: number;
   added: string;
-  unconfirmed_transactions: number;
-  tx_per_second: number;
   vbytes_per_second: number;
   total_fee: number;
   mempool_byte_weight: number;
@@ -167,3 +264,66 @@ export interface IBackendInfo {
   gitCommit: string;
   version: string;
 }
+
+export interface IDifficultyAdjustment {
+  progressPercent: number;
+  difficultyChange: number;
+  estimatedRetargetDate: number;
+  remainingBlocks: number;
+  remainingTime: number;
+  previousRetarget: number;
+  nextRetargetHeight: number;
+  timeAvg: number;
+  timeOffset: number;
+}
+
+export interface IndexedDifficultyAdjustment {
+  time: number; // UNIX timestamp
+  height: number; // Block height
+  difficulty: number;
+  adjustment: number;
+}
+
+export interface RewardStats {
+  totalReward: number;
+  totalFee: number;
+  totalTx: number;
+}
+
+export interface ITopNodesPerChannels {
+  publicKey: string,
+  alias: string,
+  channels?: number,
+  capacity: number,
+  firstSeen?: number,
+  updatedAt?: number,
+  city?: any,
+  country?: any,
+}
+
+export interface ITopNodesPerCapacity {
+  publicKey: string,
+  alias: string,
+  capacity: number,
+  channels?: number,
+  firstSeen?: number,
+  updatedAt?: number,
+  city?: any,
+  country?: any,
+}
+
+export interface INodesRanking {
+  topByCapacity: ITopNodesPerCapacity[];
+  topByChannels: ITopNodesPerChannels[];
+}
+
+export interface IOldestNodes {
+  publicKey: string,
+  alias: string,
+  firstSeen: number,
+  channels?: number,
+  capacity: number,
+  updatedAt?: number,
+  city?: any,
+  country?: any,
+}

backend/src/repositories/BlocksAuditsRepository.ts

@@ -0,0 +1,110 @@
+import blocks from '../api/blocks';
+import DB from '../database';
+import logger from '../logger';
+import { BlockAudit, AuditScore } from '../mempool.interfaces';
+
+class BlocksAuditRepositories {
+  public async $saveAudit(audit: BlockAudit): Promise<void> {
+    try {
+      await DB.query(`INSERT INTO blocks_audits(time, height, hash, missing_txs, added_txs, fresh_txs, match_rate)
+        VALUE (FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?)`, [audit.time, audit.height, audit.hash, JSON.stringify(audit.missingTxs),
+          JSON.stringify(audit.addedTxs), JSON.stringify(audit.freshTxs), audit.matchRate]);
+    } catch (e: any) {
+      if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
+        logger.debug(`Cannot save block audit for block ${audit.hash} because it has already been indexed, ignoring`);
+      } else {
+        logger.err(`Cannot save block audit into db. Reason: ` + (e instanceof Error ? e.message : e));
+        throw e;
+      }
+    }
+  }
+
+  public async $getBlockPredictionsHistory(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT UNIX_TIMESTAMP(time) as time, height, match_rate FROM blocks_audits`;
+
+      if (interval !== null) {
+        query += ` WHERE time BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(time) DIV ${div} ORDER BY height`;
+
+      const [rows] = await DB.query(query);
+      return rows;
+    } catch (e: any) {
+      logger.err(`Cannot fetch block prediction history. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getPredictionsCount(): Promise<number> {
+    try {
+      const [rows] = await DB.query(`SELECT count(hash) as count FROM blocks_audits`);
+      return rows[0].count;
+    } catch (e: any) {
+      logger.err(`Cannot fetch block prediction history. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getBlockAudit(hash: string): Promise<any> {
+    try {
+      const [rows]: any[] = await DB.query(
+        `SELECT blocks.height, blocks.hash as id, UNIX_TIMESTAMP(blocks.blockTimestamp) as timestamp, blocks.size,
+        blocks.weight, blocks.tx_count,
+        transactions, template, missing_txs as missingTxs, added_txs as addedTxs, fresh_txs as freshTxs, match_rate as matchRate
+        FROM blocks_audits
+        JOIN blocks ON blocks.hash = blocks_audits.hash
+        JOIN blocks_summaries ON blocks_summaries.id = blocks_audits.hash
+        WHERE blocks_audits.hash = "${hash}"
+      `);
+      
+      if (rows.length) {
+        rows[0].missingTxs = JSON.parse(rows[0].missingTxs);
+        rows[0].addedTxs = JSON.parse(rows[0].addedTxs);
+        rows[0].freshTxs = JSON.parse(rows[0].freshTxs);
+        rows[0].transactions = JSON.parse(rows[0].transactions);
+        rows[0].template = JSON.parse(rows[0].template);
+
+        if (rows[0].transactions.length) {
+          return rows[0];
+        }
+      }
+      return null;
+    } catch (e: any) {
+      logger.err(`Cannot fetch block audit from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getBlockAuditScore(hash: string): Promise<AuditScore> {
+    try {
+      const [rows]: any[] = await DB.query(
+        `SELECT hash, match_rate as matchRate
+        FROM blocks_audits
+        WHERE blocks_audits.hash = "${hash}"
+      `);
+      return rows[0];
+    } catch (e: any) {
+      logger.err(`Cannot fetch block audit from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getBlockAuditScores(maxHeight: number, minHeight: number): Promise<AuditScore[]> {
+    try {
+      const [rows]: any[] = await DB.query(
+        `SELECT hash, match_rate as matchRate
+        FROM blocks_audits
+        WHERE blocks_audits.height BETWEEN ? AND ?
+      `, [minHeight, maxHeight]);
+      return rows;
+    } catch (e: any) {
+      logger.err(`Cannot fetch block audit from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+}
+
+export default new BlocksAuditRepositories();
+

backend/src/repositories/BlocksRepository.ts

@@ -0,0 +1,741 @@
+import { BlockExtended, BlockPrice } from '../mempool.interfaces';
+import DB from '../database';
+import logger from '../logger';
+import { Common } from '../api/common';
+import { prepareBlock } from '../utils/blocks-utils';
+import PoolsRepository from './PoolsRepository';
+import HashratesRepository from './HashratesRepository';
+import { escape } from 'mysql2';
+import BlocksSummariesRepository from './BlocksSummariesRepository';
+import DifficultyAdjustmentsRepository from './DifficultyAdjustmentsRepository';
+
+class BlocksRepository {
+  /**
+   * Save indexed block data in the database
+   */
+  public async $saveBlockInDatabase(block: BlockExtended) {
+    try {
+      const query = `INSERT INTO blocks(
+        height,           hash,                blockTimestamp, size,
+        weight,           tx_count,            coinbase_raw,   difficulty,
+        pool_id,          fees,                fee_span,       median_fee,
+        reward,           version,             bits,           nonce,
+        merkle_root,      previous_block_hash, avg_fee,        avg_fee_rate
+      ) VALUE (
+        ?, ?, FROM_UNIXTIME(?), ?,
+        ?, ?, ?, ?,
+        ?, ?, ?, ?,
+        ?, ?, ?, ?,
+        ?, ?, ?, ?
+      )`;
+
+      const params: any[] = [
+        block.height,
+        block.id,
+        block.timestamp,
+        block.size,
+        block.weight,
+        block.tx_count,
+        block.extras.coinbaseRaw,
+        block.difficulty,
+        block.extras.pool?.id, // Should always be set to something
+        block.extras.totalFees,
+        JSON.stringify(block.extras.feeRange),
+        block.extras.medianFee,
+        block.extras.reward,
+        block.version,
+        block.bits,
+        block.nonce,
+        block.merkle_root,
+        block.previousblockhash,
+        block.extras.avgFee,
+        block.extras.avgFeeRate,
+      ];
+
+      await DB.query(query, params);
+    } catch (e: any) {
+      if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
+        logger.debug(`$saveBlockInDatabase() - Block ${block.height} has already been indexed, ignoring`);
+      } else {
+        logger.err('Cannot save indexed block into db. Reason: ' + (e instanceof Error ? e.message : e));
+        throw e;
+      }
+    }
+  }
+
+  /**
+   * Get all block height that have not been indexed between [startHeight, endHeight]
+   */
+  public async $getMissingBlocksBetweenHeights(startHeight: number, endHeight: number): Promise<number[]> {
+    if (startHeight < endHeight) {
+      return [];
+    }
+
+    try {
+      const [rows]: any[] = await DB.query(`
+        SELECT height
+        FROM blocks
+        WHERE height <= ? AND height >= ?
+        ORDER BY height DESC;
+      `, [startHeight, endHeight]);
+
+      const indexedBlockHeights: number[] = [];
+      rows.forEach((row: any) => { indexedBlockHeights.push(row.height); });
+      const seekedBlocks: number[] = Array.from(Array(startHeight - endHeight + 1).keys(), n => n + endHeight).reverse();
+      const missingBlocksHeights = seekedBlocks.filter(x => indexedBlockHeights.indexOf(x) === -1);
+
+      return missingBlocksHeights;
+    } catch (e) {
+      logger.err('Cannot retrieve blocks list to index. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get empty blocks for one or all pools
+   */
+  public async $countEmptyBlocks(poolId: number | null, interval: string | null = null): Promise<any> {
+    interval = Common.getSqlInterval(interval);
+
+    const params: any[] = [];
+    let query = `SELECT count(height) as count, pools.id as poolId
+      FROM blocks
+      JOIN pools on pools.id = blocks.pool_id
+      WHERE tx_count = 1`;
+
+    if (poolId) {
+      query += ` AND pool_id = ?`;
+      params.push(poolId);
+    }
+
+    if (interval) {
+      query += ` AND blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    query += ` GROUP by pools.id`;
+
+    try {
+      const [rows] = await DB.query(query, params);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot count empty blocks. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Return most recent block height
+   */
+  public async $mostRecentBlockHeight(): Promise<number> {
+    try {
+      const [row] = await DB.query('SELECT MAX(height) as maxHeight from blocks');
+      return row[0]['maxHeight'];
+    } catch (e) {
+      logger.err(`Cannot count blocks for this pool (using offset). Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get blocks count for a period
+   */
+  public async $blockCount(poolId: number | null, interval: string | null = null): Promise<number> {
+    interval = Common.getSqlInterval(interval);
+
+    const params: any[] = [];
+    let query = `SELECT count(height) as blockCount
+      FROM blocks`;
+
+    if (poolId) {
+      query += ` WHERE pool_id = ?`;
+      params.push(poolId);
+    }
+
+    if (interval) {
+      if (poolId) {
+        query += ` AND`;
+      } else {
+        query += ` WHERE`;
+      }
+      query += ` blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    try {
+      const [rows] = await DB.query(query, params);
+      return <number>rows[0].blockCount;
+    } catch (e) {
+      logger.err(`Cannot count blocks for this pool (using offset). Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get blocks count between two dates
+   * @param poolId
+   * @param from - The oldest timestamp
+   * @param to - The newest timestamp
+   * @returns
+   */
+  public async $blockCountBetweenTimestamp(poolId: number | null, from: number, to: number): Promise<number> {
+    const params: any[] = [];
+    let query = `SELECT
+      count(height) as blockCount,
+      max(height) as lastBlockHeight
+      FROM blocks`;
+
+    if (poolId) {
+      query += ` WHERE pool_id = ?`;
+      params.push(poolId);
+    }
+
+    if (poolId) {
+      query += ` AND`;
+    } else {
+      query += ` WHERE`;
+    }
+    query += ` blockTimestamp BETWEEN FROM_UNIXTIME('${from}') AND FROM_UNIXTIME('${to}')`;
+
+    try {
+      const [rows] = await DB.query(query, params);
+      return <number>rows[0];
+    } catch (e) {
+      logger.err(`Cannot count blocks for this pool (using timestamps). Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get blocks count for a period
+   */
+   public async $blockCountBetweenHeight(startHeight: number, endHeight: number): Promise<number> {
+    const params: any[] = [];
+    let query = `SELECT count(height) as blockCount
+      FROM blocks
+      WHERE height <= ${startHeight} AND height >= ${endHeight}`;
+
+    try {
+      const [rows] = await DB.query(query, params);
+      return <number>rows[0].blockCount;
+    } catch (e) {
+      logger.err(`Cannot count blocks for this pool (using offset). Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the oldest indexed block
+   */
+  public async $oldestBlockTimestamp(): Promise<number> {
+    const query = `SELECT UNIX_TIMESTAMP(blockTimestamp) as blockTimestamp
+      FROM blocks
+      ORDER BY height
+      LIMIT 1;`;
+
+    try {
+      const [rows]: any[] = await DB.query(query);
+
+      if (rows.length <= 0) {
+        return -1;
+      }
+
+      return <number>rows[0].blockTimestamp;
+    } catch (e) {
+      logger.err('Cannot get oldest indexed block timestamp. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get blocks mined by a specific mining pool
+   */
+  public async $getBlocksByPool(slug: string, startHeight?: number): Promise<object[]> {
+    const pool = await PoolsRepository.$getPool(slug);
+    if (!pool) {
+      throw new Error('This mining pool does not exist ' + escape(slug));
+    }
+
+    const params: any[] = [];
+    let query = ` SELECT
+      blocks.height,
+      hash as id,
+      UNIX_TIMESTAMP(blocks.blockTimestamp) as blockTimestamp,
+      size,
+      weight,
+      tx_count,
+      coinbase_raw,
+      difficulty,
+      fees,
+      fee_span,
+      median_fee,
+      reward,
+      version,
+      bits,
+      nonce,
+      merkle_root,
+      previous_block_hash as previousblockhash,
+      avg_fee,
+      avg_fee_rate
+      FROM blocks
+      WHERE pool_id = ?`;
+    params.push(pool.id);
+
+    if (startHeight !== undefined) {
+      query += ` AND height < ?`;
+      params.push(startHeight);
+    }
+
+    query += ` ORDER BY height DESC
+      LIMIT 10`;
+
+    try {
+      const [rows] = await DB.query(query, params);
+
+      const blocks: BlockExtended[] = [];
+      for (const block of <object[]>rows) {
+        blocks.push(prepareBlock(block));
+      }
+
+      return blocks;
+    } catch (e) {
+      logger.err('Cannot get blocks for this pool. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get one block by height
+   */
+  public async $getBlockByHeight(height: number): Promise<object | null> {
+    try {
+      const [rows]: any[] = await DB.query(`SELECT
+        blocks.height,
+        hash,
+        hash as id,
+        UNIX_TIMESTAMP(blocks.blockTimestamp) as blockTimestamp,
+        size,
+        weight,
+        tx_count,
+        coinbase_raw,
+        difficulty,
+        pools.id as pool_id,
+        pools.name as pool_name,
+        pools.link as pool_link,
+        pools.slug as pool_slug,
+        pools.addresses as pool_addresses,
+        pools.regexes as pool_regexes,
+        fees,
+        fee_span,
+        median_fee,
+        reward,
+        version,
+        bits,
+        nonce,
+        merkle_root,
+        previous_block_hash as previousblockhash,
+        avg_fee,
+        avg_fee_rate
+        FROM blocks
+        JOIN pools ON blocks.pool_id = pools.id
+        WHERE blocks.height = ${height}
+      `);
+
+      if (rows.length <= 0) {
+        return null;
+      }
+
+      rows[0].fee_span = JSON.parse(rows[0].fee_span);
+      return rows[0];
+    } catch (e) {
+      logger.err(`Cannot get indexed block ${height}. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get one block by hash
+   */
+  public async $getBlockByHash(hash: string): Promise<object | null> {
+    try {
+      const query = `
+        SELECT *, blocks.height, UNIX_TIMESTAMP(blocks.blockTimestamp) as blockTimestamp, hash as id,
+        pools.id as pool_id, pools.name as pool_name, pools.link as pool_link, pools.slug as pool_slug,
+        pools.addresses as pool_addresses, pools.regexes as pool_regexes,
+        previous_block_hash as previousblockhash
+        FROM blocks
+        JOIN pools ON blocks.pool_id = pools.id
+        WHERE hash = ?;
+      `;
+      const [rows]: any[] = await DB.query(query, [hash]);
+
+      if (rows.length <= 0) {
+        return null;
+      }
+
+      rows[0].fee_span = JSON.parse(rows[0].fee_span);
+      return rows[0];
+    } catch (e) {
+      logger.err(`Cannot get indexed block ${hash}. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Return blocks difficulty
+   */
+  public async $getBlocksDifficulty(): Promise<object[]> {
+    try {
+      const [rows]: any[] = await DB.query(`SELECT UNIX_TIMESTAMP(blockTimestamp) as time, height, difficulty FROM blocks`);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot get blocks difficulty list from the db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the first block at or directly after a given timestamp
+   * @param timestamp number unix time in seconds
+   * @returns The height and timestamp of a block (timestamp might vary from given timestamp)
+   */
+  public async $getBlockHeightFromTimestamp(
+    timestamp: number,
+  ): Promise<{ height: number; hash: string; timestamp: number }> {
+    try {
+      // Get first block at or after the given timestamp
+      const query = `SELECT height, hash, blockTimestamp as timestamp FROM blocks
+        WHERE blockTimestamp <= FROM_UNIXTIME(?)
+        ORDER BY blockTimestamp DESC
+        LIMIT 1`;
+      const params = [timestamp];
+      const [rows]: any[][] = await DB.query(query, params);
+      if (rows.length === 0) {
+        throw new Error(`No block was found before timestamp ${timestamp}`);
+      }
+
+      return rows[0];
+    } catch (e) {
+      logger.err(
+        'Cannot get block height from timestamp from the db. Reason: ' +
+          (e instanceof Error ? e.message : e),
+      );
+      throw e;
+    }
+  }
+
+  /**
+   * Return blocks height
+   */
+   public async $getBlocksHeightsAndTimestamp(): Promise<object[]> {
+    try {
+      const [rows]: any[] = await DB.query(`SELECT height, blockTimestamp as timestamp FROM blocks`);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot get blocks height and timestamp from the db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get general block stats
+   */
+  public async $getBlockStats(blockCount: number): Promise<any> {
+    try {
+      // We need to use a subquery
+      const query = `
+        SELECT MIN(height) as startBlock, MAX(height) as endBlock, SUM(reward) as totalReward, SUM(fees) as totalFee, SUM(tx_count) as totalTx
+        FROM
+          (SELECT height, reward, fees, tx_count FROM blocks
+          ORDER by height DESC
+          LIMIT ?) as sub`;
+
+      const [rows]: any = await DB.query(query, [blockCount]);
+
+      return rows[0];
+    } catch (e) {
+      logger.err('Cannot generate reward stats. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Check if the chain of block hash is valid and delete data from the stale branch if needed
+   */
+  public async $validateChain(): Promise<boolean> {
+    try {
+      const start = new Date().getTime();
+      const [blocks]: any[] = await DB.query(`SELECT height, hash, previous_block_hash,
+        UNIX_TIMESTAMP(blockTimestamp) as timestamp FROM blocks ORDER BY height`);
+
+      let partialMsg = false;
+      let idx = 1;
+      while (idx < blocks.length) {
+        if (blocks[idx].height - 1 !== blocks[idx - 1].height) {
+          if (partialMsg === false) {
+            logger.info('Some blocks are not indexed, skipping missing blocks during chain validation');
+            partialMsg = true;
+          }
+          ++idx;
+          continue;
+        }
+
+        if (blocks[idx].previous_block_hash !== blocks[idx - 1].hash) {
+          logger.warn(`Chain divergence detected at block ${blocks[idx - 1].height}`);
+          await this.$deleteBlocksFrom(blocks[idx - 1].height);
+          await BlocksSummariesRepository.$deleteBlocksFrom(blocks[idx - 1].height);
+          await HashratesRepository.$deleteHashratesFromTimestamp(blocks[idx - 1].timestamp - 604800);
+          await DifficultyAdjustmentsRepository.$deleteAdjustementsFromHeight(blocks[idx - 1].height);
+          return false;
+        }
+        ++idx;
+      }
+
+      logger.debug(`${idx} blocks hash validated in ${new Date().getTime() - start} ms`);
+      return true;
+    } catch (e) {
+      logger.err('Cannot validate chain of block hash. Reason: ' + (e instanceof Error ? e.message : e));
+      return true; // Don't do anything if there is a db error
+    }
+  }
+
+  /**
+   * Delete blocks from the database from blockHeight
+   */
+  public async $deleteBlocksFrom(blockHeight: number) {
+    logger.info(`Delete newer blocks from height ${blockHeight} from the database`);
+
+    try {
+      await DB.query(`DELETE FROM blocks where height >= ${blockHeight}`);
+    } catch (e) {
+      logger.err('Cannot delete indexed blocks. Reason: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  /**
+   * Get the historical averaged block fees
+   */
+  public async $getHistoricalBlockFees(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(blocks.height) as INT) as avgHeight,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(fees) as INT) as avgFees,
+        prices.USD
+        FROM blocks
+        JOIN blocks_prices on blocks_prices.height = blocks.height
+        JOIN prices on prices.id = blocks_prices.price_id
+      `;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block fees history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the historical averaged block rewards
+   */
+  public async $getHistoricalBlockRewards(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(blocks.height) as INT) as avgHeight,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(reward) as INT) as avgRewards,
+        prices.USD
+        FROM blocks
+        JOIN blocks_prices on blocks_prices.height = blocks.height
+        JOIN prices on prices.id = blocks_prices.price_id
+      `;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block rewards history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the historical averaged block fee rate percentiles
+   */
+   public async $getHistoricalBlockFeeRates(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(height) as INT) as avgHeight,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[0]')) as INT) as avgFee_0,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[1]')) as INT) as avgFee_10,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[2]')) as INT) as avgFee_25,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[3]')) as INT) as avgFee_50,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[4]')) as INT) as avgFee_75,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[5]')) as INT) as avgFee_90,
+        CAST(AVG(JSON_EXTRACT(fee_span, '$[6]')) as INT) as avgFee_100
+      FROM blocks`;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block fee rates history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the historical averaged block sizes
+   */
+   public async $getHistoricalBlockSizes(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(height) as INT) as avgHeight,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(size) as INT) as avgSize
+      FROM blocks`;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the historical averaged block weights
+   */
+   public async $getHistoricalBlockWeights(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(height) as INT) as avgHeight,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(weight) as INT) as avgWeight
+      FROM blocks`;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get a list of blocks that have been indexed
+   */
+  public async $getIndexedBlocks(): Promise<any[]> {
+    try {
+      const [rows]: any = await DB.query(`SELECT height, hash FROM blocks ORDER BY height DESC`);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get a list of blocks that have not had CPFP data indexed
+   */
+   public async $getCPFPUnindexedBlocks(): Promise<any[]> {
+    try {
+      const [rows]: any = await DB.query(`SELECT height, hash FROM blocks WHERE cpfp_indexed = 0 ORDER BY height DESC`);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot fetch CPFP unindexed blocks. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $setCPFPIndexed(hash: string): Promise<void> {
+    await DB.query(`UPDATE blocks SET cpfp_indexed = 1 WHERE hash = ?`, [hash]);
+  }
+
+  /**
+   * Return the oldest block  from a consecutive chain of block from the most recent one
+   */
+  public async $getOldestConsecutiveBlock(): Promise<any> {
+    try {
+      const [rows]: any = await DB.query(`SELECT height, UNIX_TIMESTAMP(blockTimestamp) as timestamp, difficulty FROM blocks ORDER BY height DESC`);
+      for (let i = 0; i < rows.length - 1; ++i) {
+        if (rows[i].height - rows[i + 1].height > 1) {
+          return rows[i];
+        }
+      }
+      return rows[rows.length - 1];
+    } catch (e) {
+      logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get all blocks which have not be linked to a price yet
+   */
+   public async $getBlocksWithoutPrice(): Promise<object[]> {
+    try {
+      const [rows]: any[] = await DB.query(`
+        SELECT UNIX_TIMESTAMP(blocks.blockTimestamp) as timestamp, blocks.height
+        FROM blocks
+        LEFT JOIN blocks_prices ON blocks.height = blocks_prices.height
+        WHERE blocks_prices.height IS NULL
+        ORDER BY blocks.height
+      `);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot get blocks height and timestamp from the db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Save block price by batch
+   */
+   public async $saveBlockPrices(blockPrices: BlockPrice[]): Promise<void> {
+    try {
+      let query = `INSERT INTO blocks_prices(height, price_id) VALUES`;
+      for (const price of blockPrices) {
+        query += ` (${price.height}, ${price.priceId}),`
+      }
+      query = query.slice(0, -1);
+      await DB.query(query);
+    } catch (e: any) {
+      if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
+        logger.debug(`Cannot save blocks prices for blocks [${blockPrices[0].height} to ${blockPrices[blockPrices.length - 1].height}] because it has already been indexed, ignoring`);
+      } else {
+        logger.err(`Cannot save blocks prices for blocks [${blockPrices[0].height} to ${blockPrices[blockPrices.length - 1].height}] into db. Reason: ` + (e instanceof Error ? e.message : e));
+        throw e;
+      }
+    }
+  }
+}
+
+export default new BlocksRepository();

backend/src/repositories/BlocksSummariesRepository.ts

@@ -0,0 +1,86 @@
+import DB from '../database';
+import logger from '../logger';
+import { BlockSummary } from '../mempool.interfaces';
+
+class BlocksSummariesRepository {
+  public async $getByBlockId(id: string): Promise<BlockSummary | undefined> {
+    try {
+      const [summary]: any[] = await DB.query(`SELECT * from blocks_summaries WHERE id = ?`, [id]);
+      if (summary.length > 0) {
+        summary[0].transactions = JSON.parse(summary[0].transactions);
+        return summary[0];
+      }
+    } catch (e) {
+      logger.err(`Cannot get block summary for block id ${id}. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    return undefined;
+  }
+
+  public async $saveSummary(params: { height: number, mined?: BlockSummary}) {
+    const blockId = params.mined?.id;
+    try {
+      const transactions = JSON.stringify(params.mined?.transactions || []);
+      await DB.query(`
+        INSERT INTO blocks_summaries (height, id, transactions, template)
+        VALUE (?, ?, ?, ?)
+        ON DUPLICATE KEY UPDATE
+          transactions = ?
+      `, [params.height, blockId, transactions, '[]', transactions]);
+    } catch (e: any) {
+      if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
+        logger.debug(`Cannot save block summary for ${blockId} because it has already been indexed, ignoring`);
+      } else {
+        logger.debug(`Cannot save block summary for ${blockId}. Reason: ${e instanceof Error ? e.message : e}`);
+        throw e;
+      }
+    }
+  }
+
+  public async $saveTemplate(params: { height: number, template: BlockSummary}) {
+    const blockId = params.template?.id;
+    try {
+      const transactions = JSON.stringify(params.template?.transactions || []);
+      await DB.query(`
+        INSERT INTO blocks_summaries (height, id, transactions, template)
+        VALUE (?, ?, ?, ?)
+        ON DUPLICATE KEY UPDATE
+          template = ?
+      `, [params.height, blockId, '[]', transactions, transactions]);
+    } catch (e: any) {
+      if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
+        logger.debug(`Cannot save block template for ${blockId} because it has already been indexed, ignoring`);
+      } else {
+        logger.debug(`Cannot save block template for ${blockId}. Reason: ${e instanceof Error ? e.message : e}`);
+        throw e;
+      }
+    }
+  }
+
+  public async $getIndexedSummariesId(): Promise<string[]> {
+    try {
+      const [rows]: any[] = await DB.query(`SELECT id from blocks_summaries`);
+      return rows.map(row => row.id);
+    } catch (e) {
+      logger.err(`Cannot get block summaries id list. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+    return [];
+  }
+
+  /**
+   * Delete blocks from the database from blockHeight
+   */
+  public async $deleteBlocksFrom(blockHeight: number) {
+    logger.info(`Delete newer blocks summary from height ${blockHeight} from the database`);
+
+    try {
+      await DB.query(`DELETE FROM blocks_summaries where height >= ${blockHeight}`);
+    } catch (e) {
+      logger.err('Cannot delete indexed blocks summaries. Reason: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+}
+
+export default new BlocksSummariesRepository();
+

backend/src/repositories/CpfpRepository.ts

@@ -0,0 +1,43 @@
+import DB from '../database';
+import logger from '../logger';
+import { Ancestor } from '../mempool.interfaces';
+
+class CpfpRepository {
+  public async $saveCluster(height: number, txs: Ancestor[], effectiveFeePerVsize: number): Promise<void> {
+    try {
+      const txsJson = JSON.stringify(txs);
+      await DB.query(
+        `
+          INSERT INTO cpfp_clusters(root, height, txs, fee_rate)
+          VALUE (?, ?, ?, ?)
+          ON DUPLICATE KEY UPDATE
+            height = ?,
+            txs = ?,
+            fee_rate = ?
+        `,
+        [txs[0].txid, height, txsJson, effectiveFeePerVsize, height, txsJson, effectiveFeePerVsize, height]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot save cpfp cluster into db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $deleteClustersFrom(height: number): Promise<void> {
+    logger.info(`Delete newer cpfp clusters from height ${height} from the database`);
+    try {
+      await DB.query(
+        `
+          DELETE from cpfp_clusters
+          WHERE height >= ?
+        `,
+        [height]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot delete cpfp clusters from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+}
+
+export default new CpfpRepository();

backend/src/repositories/DifficultyAdjustmentsRepository.ts

@@ -0,0 +1,124 @@
+import { Common } from '../api/common';
+import config from '../config';
+import DB from '../database';
+import logger from '../logger';
+import { IndexedDifficultyAdjustment } from '../mempool.interfaces';
+
+class DifficultyAdjustmentsRepository {
+  public async $saveAdjustments(adjustment: IndexedDifficultyAdjustment): Promise<void> {
+    if (adjustment.height === 1) {
+      return;
+    }
+
+    try {
+      const query = `INSERT INTO difficulty_adjustments(time, height, difficulty, adjustment) VALUE (FROM_UNIXTIME(?), ?, ?, ?)`;
+      const params: any[] = [
+        adjustment.time,
+        adjustment.height,
+        adjustment.difficulty,
+        adjustment.adjustment,
+      ];
+      await DB.query(query, params);
+    } catch (e: any) {
+      if (e.errno === 1062) { // ER_DUP_ENTRY - This scenario is possible upon node backend restart
+        logger.debug(`Cannot save difficulty adjustment at block ${adjustment.height}, already indexed, ignoring`);
+      } else {
+        logger.err(`Cannot save difficulty adjustment at block ${adjustment.height}. Reason: ${e instanceof Error ? e.message : e}`);
+        throw e;
+      }
+    }
+  }
+
+  public async $getAdjustments(interval: string | null, descOrder: boolean = false): Promise<IndexedDifficultyAdjustment[]> {
+    interval = Common.getSqlInterval(interval);
+
+    let query = `SELECT 
+      CAST(AVG(UNIX_TIMESTAMP(time)) as INT) as time,
+      CAST(AVG(height) AS INT) as height,
+      CAST(AVG(difficulty) as DOUBLE) as difficulty,
+      CAST(AVG(adjustment) as DOUBLE) as adjustment
+      FROM difficulty_adjustments`;
+
+    if (interval) {
+      query += ` WHERE time BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    query += ` GROUP BY UNIX_TIMESTAMP(time) DIV ${86400}`;
+
+    if (descOrder === true) {
+      query += ` ORDER BY height DESC`;
+    } else {
+      query += ` ORDER BY height`;
+    }
+
+    try {
+      const [rows] = await DB.query(query);
+      return rows as IndexedDifficultyAdjustment[];
+    } catch (e) {
+      logger.err(`Cannot get difficulty adjustments from the database. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getRawAdjustments(interval: string | null, descOrder: boolean = false): Promise<IndexedDifficultyAdjustment[]> {
+    interval = Common.getSqlInterval(interval);
+
+    let query = `SELECT 
+      UNIX_TIMESTAMP(time) as time,
+      height as height,
+      difficulty as difficulty,
+      adjustment as adjustment
+      FROM difficulty_adjustments`;
+
+    if (interval) {
+      query += ` WHERE time BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    if (descOrder === true) {
+      query += ` ORDER BY height DESC`;
+    } else {
+      query += ` ORDER BY height`;
+    }
+
+    try {
+      const [rows] = await DB.query(query);
+      return rows as IndexedDifficultyAdjustment[];
+    } catch (e) {
+      logger.err(`Cannot get difficulty adjustments from the database. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getAdjustmentsHeights(): Promise<number[]> {
+    try {
+      const [rows]: any[] = await DB.query(`SELECT height FROM difficulty_adjustments`);
+      return rows.map(block => block.height);
+    } catch (e: any) {
+      logger.err(`Cannot get difficulty adjustment block heights. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  public async $deleteAdjustementsFromHeight(height: number): Promise<void> {
+    try {
+      logger.info(`Delete newer difficulty adjustments from height ${height} from the database`);
+      await DB.query(`DELETE FROM difficulty_adjustments WHERE height >= ?`, [height]);
+    } catch (e: any) {
+      logger.err(`Cannot delete difficulty adjustments from the database. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
+  public async $deleteLastAdjustment(): Promise<void> {
+    try {
+      logger.info(`Delete last difficulty adjustment from the database`);
+      await DB.query(`DELETE FROM difficulty_adjustments ORDER BY time LIMIT 1`);
+    } catch (e: any) {
+      logger.err(`Cannot delete last difficulty adjustment from the database. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+}
+
+export default new DifficultyAdjustmentsRepository();
+

backend/src/repositories/HashratesRepository.ts

@@ -0,0 +1,249 @@
+import { escape } from 'mysql2';
+import { Common } from '../api/common';
+import DB from '../database';
+import logger from '../logger';
+import PoolsRepository from './PoolsRepository';
+
+class HashratesRepository {
+  /**
+   * Save indexed block data in the database
+   */
+  public async $saveHashrates(hashrates: any) {
+    if (hashrates.length === 0) {
+      return;
+    }
+
+    let query = `INSERT INTO
+      hashrates(hashrate_timestamp, avg_hashrate, pool_id, share, type) VALUES`;
+
+    for (const hashrate of hashrates) {
+      query += ` (FROM_UNIXTIME(${hashrate.hashrateTimestamp}), ${hashrate.avgHashrate}, ${hashrate.poolId}, ${hashrate.share}, "${hashrate.type}"),`;
+    }
+    query = query.slice(0, -1);
+
+    try {
+      await DB.query(query);
+    } catch (e: any) {
+      logger.err('Cannot save indexed hashrate into db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getRawNetworkDailyHashrate(interval: string | null): Promise<any[]> {
+    interval = Common.getSqlInterval(interval);
+
+    let query = `SELECT
+      UNIX_TIMESTAMP(hashrate_timestamp) as timestamp,
+      avg_hashrate as avgHashrate
+      FROM hashrates`;
+
+    if (interval) {
+      query += ` WHERE hashrate_timestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()
+        AND hashrates.type = 'daily'`;
+    } else {
+      query += ` WHERE hashrates.type = 'daily'`;
+    }
+
+    query += ` ORDER by hashrate_timestamp`;
+
+    try {
+      const [rows]: any[] = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot fetch network hashrate history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getNetworkDailyHashrate(interval: string | null): Promise<any[]> {
+    interval = Common.getSqlInterval(interval);
+
+    let query = `SELECT
+      CAST(AVG(UNIX_TIMESTAMP(hashrate_timestamp)) as INT) as timestamp,
+      CAST(AVG(avg_hashrate) as DOUBLE) as avgHashrate
+      FROM hashrates`;
+
+    if (interval) {
+      query += ` WHERE hashrate_timestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()
+        AND hashrates.type = 'daily'`;
+    } else {
+      query += ` WHERE hashrates.type = 'daily'`;
+    }
+
+    query += ` GROUP BY UNIX_TIMESTAMP(hashrate_timestamp) DIV ${86400}`;
+    query += ` ORDER by hashrate_timestamp`;
+
+    try {
+      const [rows]: any[] = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot fetch network hashrate history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getWeeklyHashrateTimestamps(): Promise<number[]> {
+    const query = `SELECT UNIX_TIMESTAMP(hashrate_timestamp) as timestamp
+      FROM hashrates
+      WHERE type = 'weekly'
+      GROUP BY hashrate_timestamp`;
+
+    try {
+      const [rows]: any[] = await DB.query(query);
+      return rows.map(row => row.timestamp);
+    } catch (e) {
+      logger.err('Cannot retreive indexed weekly hashrate timestamps. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Returns the current biggest pool hashrate history
+   */
+  public async $getPoolsWeeklyHashrate(interval: string | null): Promise<any[]> {
+    interval = Common.getSqlInterval(interval);
+
+    const topPoolsId = (await PoolsRepository.$getPoolsInfo('1w')).map((pool) => pool.poolId);
+    if (topPoolsId.length === 0) {
+      return [];
+    }
+
+    let query = `SELECT UNIX_TIMESTAMP(hashrate_timestamp) as timestamp, avg_hashrate as avgHashrate, share, pools.name as poolName
+      FROM hashrates
+      JOIN pools on pools.id = pool_id`;
+
+    if (interval) {
+      query += ` WHERE hashrate_timestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()
+        AND hashrates.type = 'weekly'
+        AND pool_id IN (${topPoolsId})`;
+    } else {
+      query += ` WHERE hashrates.type = 'weekly'
+        AND pool_id IN (${topPoolsId})`;
+    }
+
+    query += ` ORDER by hashrate_timestamp, FIELD(pool_id, ${topPoolsId})`;
+
+    try {
+      const [rows]: any[] = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot fetch weekly pools hashrate history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Returns a pool hashrate history
+   */
+  public async $getPoolWeeklyHashrate(slug: string): Promise<any[]> {
+    const pool = await PoolsRepository.$getPool(slug);
+    if (!pool) {
+      throw new Error('This mining pool does not exist ' + escape(slug));
+    }
+
+    // Find hashrate boundaries
+    let query = `SELECT MIN(hashrate_timestamp) as firstTimestamp, MAX(hashrate_timestamp) as lastTimestamp
+      FROM hashrates
+      JOIN pools on pools.id = pool_id
+      WHERE hashrates.type = 'weekly' AND pool_id = ? AND avg_hashrate != 0
+      ORDER by hashrate_timestamp LIMIT 1`;
+
+    let boundaries = {
+      firstTimestamp: '1970-01-01',
+      lastTimestamp: '9999-01-01'
+    };
+
+    try {
+      const [rows]: any[] = await DB.query(query, [pool.id]);
+      boundaries = rows[0];
+    } catch (e) {
+      logger.err('Cannot fetch hashrate start/end timestamps for this pool. Reason: ' + (e instanceof Error ? e.message : e));
+    }
+
+    // Get hashrates entries between boundaries
+    query = `SELECT UNIX_TIMESTAMP(hashrate_timestamp) as timestamp, avg_hashrate as avgHashrate, share, pools.name as poolName
+      FROM hashrates
+      JOIN pools on pools.id = pool_id
+      WHERE hashrates.type = 'weekly' AND hashrate_timestamp BETWEEN ? AND ?
+      AND pool_id = ?
+      ORDER by hashrate_timestamp`;
+
+    try {
+      const [rows]: any[] = await DB.query(query, [boundaries.firstTimestamp, boundaries.lastTimestamp, pool.id]);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot fetch pool hashrate history for this pool. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Set latest run timestamp
+   */
+  public async $setLatestRun(key: string, val: number) {
+    const query = `UPDATE state SET number = ? WHERE name = ?`;
+
+    try {
+      await DB.query(query, [val, key]);
+    } catch (e) {
+      logger.err(`Cannot set last indexing run for ${key}. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get latest run timestamp
+   */
+  public async $getLatestRun(key: string): Promise<number> {
+    const query = `SELECT number FROM state WHERE name = ?`;
+
+    try {
+      const [rows]: any[] = await DB.query(query, [key]);
+
+      if (rows.length === 0) {
+        return 0;
+      }
+      return rows[0]['number'];
+    } catch (e) {
+      logger.err(`Cannot retrieve last indexing run for ${key}. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Delete most recent data points for re-indexing
+   */
+  public async $deleteLastEntries() {
+    logger.info(`Delete latest hashrates data points from the database`);
+
+    try {
+      const [rows]: any[] = await DB.query(`SELECT MAX(hashrate_timestamp) as timestamp FROM hashrates GROUP BY type`);
+      for (const row of rows) {
+        await DB.query(`DELETE FROM hashrates WHERE hashrate_timestamp = ?`, [row.timestamp]);
+      }
+      // Re-run the hashrate indexing to fill up missing data
+      await this.$setLatestRun('last_hashrates_indexing', 0);
+      await this.$setLatestRun('last_weekly_hashrates_indexing', 0);
+    } catch (e) {
+      logger.err('Cannot delete latest hashrates data points. Reason: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+  
+  /**
+   * Delete hashrates from the database from timestamp
+   */
+  public async $deleteHashratesFromTimestamp(timestamp: number) {
+    logger.info(`Delete newer hashrates from timestamp ${new Date(timestamp * 1000).toUTCString()} from the database`);
+
+    try {
+      await DB.query(`DELETE FROM hashrates WHERE hashrate_timestamp >= FROM_UNIXTIME(?)`, [timestamp]);
+      // Re-run the hashrate indexing to fill up missing data
+      await this.$setLatestRun('last_hashrates_indexing', 0);
+      await this.$setLatestRun('last_weekly_hashrates_indexing', 0);
+    } catch (e) {
+      logger.err('Cannot delete latest hashrates data points. Reason: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+}
+
+export default new HashratesRepository();

backend/src/repositories/NodeRecordsRepository.ts

@@ -0,0 +1,67 @@
+import { ResultSetHeader, RowDataPacket } from 'mysql2';
+import DB from '../database';
+import logger from '../logger';
+
+export interface NodeRecord {
+  publicKey: string; // node public key
+  type: number; // TLV extension record type
+  payload: string; // base64 record payload
+}
+
+class NodesRecordsRepository {
+  public async $saveRecord(record: NodeRecord): Promise<void> {
+    try {
+      const payloadBytes = Buffer.from(record.payload, 'base64');
+      await DB.query(`
+        INSERT INTO nodes_records(public_key, type, payload)
+        VALUE (?, ?, ?)
+        ON DUPLICATE KEY UPDATE
+          payload = ?
+      `, [record.publicKey, record.type, payloadBytes, payloadBytes]);
+    } catch (e: any) {
+      if (e.errno !== 1062) { // ER_DUP_ENTRY - Not an issue, just ignore this
+        logger.err(`Cannot save node record (${[record.publicKey, record.type, record.payload]}) into db. Reason: ` + (e instanceof Error ? e.message : e));
+        // We don't throw, not a critical issue if we miss some nodes records
+      }
+    }
+   }
+
+  public async $getRecordTypes(publicKey: string): Promise<any> {
+    try {
+      const query = `
+        SELECT type FROM nodes_records
+        WHERE public_key = ?
+      `;
+      const [rows] = await DB.query<RowDataPacket[][]>(query, [publicKey]);
+      return rows.map(row => row['type']);
+    } catch (e) {
+      logger.err(`Cannot retrieve custom records for ${publicKey} from db. Reason: ` + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $deleteUnusedRecords(publicKey: string, recordTypes: number[]): Promise<number> {
+    try {
+      let query;
+      if (recordTypes.length) {
+        query = `
+          DELETE FROM nodes_records
+          WHERE public_key = ?
+          AND type NOT IN (${recordTypes.map(type => `${type}`).join(',')})
+        `;
+      } else {
+        query = `
+          DELETE FROM nodes_records
+          WHERE public_key = ?
+        `;
+      }
+      const [result] = await DB.query<ResultSetHeader>(query, [publicKey]);
+      return result.affectedRows;
+    } catch (e) {
+      logger.err(`Cannot delete unused custom records for ${publicKey} from db. Reason: ` + (e instanceof Error ? e.message : e));
+      return 0;
+    }
+  }
+}
+
+export default new NodesRecordsRepository();

backend/src/repositories/NodesSocketsRepository.ts

@@ -0,0 +1,45 @@
+import { ResultSetHeader } from 'mysql2';
+import DB from '../database';
+import logger from '../logger';
+
+export interface NodeSocket {
+  publicKey: string;
+  network: string | null;
+  addr: string;
+}
+
+class NodesSocketsRepository {
+  public async $saveSocket(socket: NodeSocket): Promise<void> {
+    try {
+      await DB.query(`
+        INSERT INTO nodes_sockets(public_key, socket, type)
+        VALUE (?, ?, ?)
+      `, [socket.publicKey, socket.addr, socket.network]);
+    } catch (e: any) {
+      if (e.errno !== 1062) { // ER_DUP_ENTRY - Not an issue, just ignore this
+        logger.err(`Cannot save node socket (${[socket.publicKey, socket.addr, socket.network]}) into db. Reason: ` + (e instanceof Error ? e.message : e));
+        // We don't throw, not a critical issue if we miss some nodes sockets
+      }
+    }
+   }
+
+   public async $deleteUnusedSockets(publicKey: string, addresses: string[]): Promise<number> {
+    if (addresses.length === 0) {
+      return 0;
+    }
+    try {
+      const query = `
+        DELETE FROM nodes_sockets
+        WHERE public_key = ?
+        AND socket NOT IN (${addresses.map(id => `"${id}"`).join(',')})
+      `;
+      const [result] = await DB.query<ResultSetHeader>(query, [publicKey]);
+      return result.affectedRows;
+    } catch (e) {
+      logger.err(`Cannot delete unused sockets for ${publicKey} from db. Reason: ` + (e instanceof Error ? e.message : e));
+      return 0;
+    }
+   }
+}
+
+export default new NodesSocketsRepository();

backend/src/repositories/PoolsRepository.ts

@@ -0,0 +1,99 @@
+import { Common } from '../api/common';
+import config from '../config';
+import DB from '../database';
+import logger from '../logger';
+import { PoolInfo, PoolTag } from '../mempool.interfaces';
+
+class PoolsRepository {
+  /**
+   * Get all pools tagging info
+   */
+  public async $getPools(): Promise<PoolTag[]> {
+    const [rows] = await DB.query('SELECT id, name, addresses, regexes, slug FROM pools;');
+    return <PoolTag[]>rows;
+  }
+
+  /**
+   * Get unknown pool tagging info
+   */
+  public async $getUnknownPool(): Promise<PoolTag> {
+    const [rows] = await DB.query('SELECT id, name, slug FROM pools where name = "Unknown"');
+    return <PoolTag>rows[0];
+  }
+
+  /**
+   * Get basic pool info and block count
+   */
+  public async $getPoolsInfo(interval: string | null = null): Promise<PoolInfo[]> {
+    interval = Common.getSqlInterval(interval);
+
+    let query = `SELECT COUNT(height) as blockCount, pool_id as poolId, pools.name as name, pools.link as link, slug
+      FROM blocks
+      JOIN pools on pools.id = pool_id`;
+
+    if (interval) {
+      query += ` WHERE blocks.blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+    }
+
+    query += ` GROUP BY pool_id
+      ORDER BY COUNT(height) DESC`;
+
+    try {
+      const [rows] = await DB.query(query);
+      return <PoolInfo[]>rows;
+    } catch (e) {
+      logger.err(`Cannot generate pools stats. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get basic pool info and block count between two timestamp
+   */
+   public async $getPoolsInfoBetween(from: number, to: number): Promise<PoolInfo[]> {
+    const query = `SELECT COUNT(height) as blockCount, pools.id as poolId, pools.name as poolName
+      FROM pools
+      LEFT JOIN blocks on pools.id = blocks.pool_id AND blocks.blockTimestamp BETWEEN FROM_UNIXTIME(?) AND FROM_UNIXTIME(?)
+      GROUP BY pools.id`;
+
+    try {
+      const [rows] = await DB.query(query, [from, to]);
+      return <PoolInfo[]>rows;
+    } catch (e) {
+      logger.err('Cannot generate pools blocks count. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get mining pool statistics for one pool
+   */
+   public async $getPool(slug: string): Promise<PoolTag | null> {
+    const query = `
+      SELECT *
+      FROM pools
+      WHERE pools.slug = ?`;
+
+    try {
+      const [rows]: any[] = await DB.query(query, [slug]);
+
+      if (rows.length < 1) {
+        return null;
+      }
+
+      rows[0].regexes = JSON.parse(rows[0].regexes);
+      if (['testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
+        rows[0].addresses = []; // pools.json only contains mainnet addresses
+      } else {
+        rows[0].addresses = JSON.parse(rows[0].addresses);
+      }
+
+      return rows[0];
+    } catch (e) {
+      logger.err('Cannot get pool from db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+}
+
+export default new PoolsRepository();

backend/src/repositories/PricesRepository.ts

@@ -0,0 +1,52 @@
+import DB from '../database';
+import logger from '../logger';
+import { Prices } from '../tasks/price-updater';
+
+class PricesRepository {
+  public async $savePrices(time: number, prices: Prices): Promise<void> {
+    if (prices.USD === -1) {
+      // Some historical price entries have not USD prices, so we just ignore them to avoid future UX issues
+      // As of today there are only 4 (on 2013-09-05, 2013-09-19, 2013-09-12 and 2013-09-26) so that's fine
+      return;
+    }
+
+    try {
+      await DB.query(`
+        INSERT INTO prices(time,             USD, EUR, GBP, CAD, CHF, AUD, JPY)
+        VALUE             (FROM_UNIXTIME(?), ?,   ?,   ?,   ?,   ?,   ?,   ?  )`,
+        [time, prices.USD, prices.EUR, prices.GBP, prices.CAD, prices.CHF, prices.AUD, prices.JPY]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot save exchange rate into db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getOldestPriceTime(): Promise<number> {
+    const [oldestRow] = await DB.query(`SELECT UNIX_TIMESTAMP(time) as time from prices WHERE USD != -1 ORDER BY time LIMIT 1`);
+    return oldestRow[0] ? oldestRow[0].time : 0;
+  }
+
+  public async $getLatestPriceId(): Promise<number | null> {
+    const [oldestRow] = await DB.query(`SELECT id from prices WHERE USD != -1 ORDER BY time DESC LIMIT 1`);
+    return oldestRow[0] ? oldestRow[0].id : null;
+  }
+
+  public async $getLatestPriceTime(): Promise<number> {
+    const [oldestRow] = await DB.query(`SELECT UNIX_TIMESTAMP(time) as time from prices WHERE USD != -1 ORDER BY time DESC LIMIT 1`);
+    return oldestRow[0] ? oldestRow[0].time : 0;
+  }
+
+  public async $getPricesTimes(): Promise<number[]> {
+    const [times]: any[] = await DB.query(`SELECT UNIX_TIMESTAMP(time) as time from prices WHERE USD != -1 ORDER BY time`);
+    return times.map(time => time.time);
+  }
+
+  public async $getPricesTimesAndId(): Promise<number[]> {
+    const [times]: any[] = await DB.query(`SELECT UNIX_TIMESTAMP(time) as time, id, USD from prices ORDER BY time`);
+    return times;
+  }
+}
+
+export default new PricesRepository();
+

backend/src/repositories/TransactionRepository.ts

@@ -0,0 +1,77 @@
+import DB from '../database';
+import logger from '../logger';
+import { Ancestor, CpfpInfo } from '../mempool.interfaces';
+
+interface CpfpSummary {
+  txid: string;
+  cluster: string;
+  root: string;
+  txs: Ancestor[];
+  height: number;
+  fee_rate: number;
+}
+
+class TransactionRepository {
+  public async $setCluster(txid: string, cluster: string): Promise<void> {
+    try {
+      await DB.query(
+        `
+          INSERT INTO transactions
+          (
+            txid,
+            cluster
+          )
+          VALUE (?, ?)
+          ON DUPLICATE KEY UPDATE
+            cluster = ?
+        ;`,
+        [txid, cluster, cluster]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot save transaction cpfp cluster into db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public async $getCpfpInfo(txid: string): Promise<CpfpInfo | void> {
+    try {
+      let query = `
+        SELECT *
+        FROM transactions
+        LEFT JOIN cpfp_clusters AS cluster ON cluster.root = transactions.cluster
+        WHERE transactions.txid = ?
+      `;
+      const [rows]: any = await DB.query(query, [txid]);
+      if (rows.length) {
+        rows[0].txs = JSON.parse(rows[0].txs) as Ancestor[];
+        return this.convertCpfp(rows[0]);
+      }
+    } catch (e) {
+      logger.err('Cannot get transaction cpfp info from db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  private convertCpfp(cpfp: CpfpSummary): CpfpInfo {
+    const descendants: Ancestor[] = [];
+    const ancestors: Ancestor[] = [];
+    let matched = false;
+    for (const tx of cpfp.txs) {
+      if (tx.txid === cpfp.txid) {
+        matched = true;
+      } else if (!matched) {
+        descendants.push(tx);
+      } else {
+        ancestors.push(tx);
+      }
+    }
+    return {
+      descendants,
+      ancestors,
+      effectiveFeePerVsize: cpfp.fee_rate
+    };
+  }
+}
+
+export default new TransactionRepository();
+

backend/src/routes.ts

@@ -1,833 +0,0 @@
-import config from './config';
-import { Request, Response } from 'express';
-import statistics from './api/statistics';
-import feeApi from './api/fee-api';
-import backendInfo from './api/backend-info';
-import mempoolBlocks from './api/mempool-blocks';
-import mempool from './api/mempool';
-import bisq from './api/bisq/bisq';
-import websocketHandler from './api/websocket-handler';
-import bisqMarket from './api/bisq/markets-api';
-import { RequiredSpec, TransactionExtended } from './mempool.interfaces';
-import { MarketsApiError } from './api/bisq/interfaces';
-import { IEsploraApi } from './api/bitcoin/esplora-api.interface';
-import logger from './logger';
-import bitcoinApi from './api/bitcoin/bitcoin-api-factory';
-import transactionUtils from './api/transaction-utils';
-import blocks from './api/blocks';
-import loadingIndicators from './api/loading-indicators';
-import { Common } from './api/common';
-import bitcoinClient from './api/bitcoin/bitcoin-client';
-import elementsParser from './api/liquid/elements-parser';
-import icons from './api/liquid/icons';
-
-class Routes {
-  constructor() {}
-
-  public async get2HStatistics(req: Request, res: Response) {
-    const result = await statistics.$list2H();
-    res.json(result);
-  }
-
-  public get24HStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['24h']);
-  }
-
-  public get1WHStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['1w']);
-  }
-
-  public get1MStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['1m']);
-  }
-
-  public get3MStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['3m']);
-  }
-
-  public get6MStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['6m']);
-  }
-
-  public get1YStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['1y']);
-  }
-
-  public get2YStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['2y']);
-  }
-  
-  public get3YStatistics(req: Request, res: Response) {
-    res.json(statistics.getCache()['3y']);
-  }
-
-  public getInitData(req: Request, res: Response) {
-    try {
-      const result = websocketHandler.getInitData();
-      res.json(result);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getRecommendedFees(req: Request, res: Response) {
-    if (!mempool.isInSync()) {
-      res.statusCode = 503;
-      res.send('Service Unavailable');
-      return;
-    }
-    const result = feeApi.getRecommendedFee();
-    res.json(result);
-  }
-
-  public getMempoolBlocks(req: Request, res: Response) {
-    try {
-      const result = mempoolBlocks.getMempoolBlocks();
-      res.json(result);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public getTransactionTimes(req: Request, res: Response) {
-    if (!Array.isArray(req.query.txId)) {
-      res.status(500).send('Not an array');
-      return;
-    }
-    const txIds: string[] = [];
-    for (const _txId in req.query.txId) {
-      if (typeof req.query.txId[_txId] === 'string') {
-        txIds.push(req.query.txId[_txId].toString());
-      }
-    }
-
-    const times = mempool.getFirstSeenForTransactions(txIds);
-    res.json(times);
-  }
-
-  public getCpfpInfo(req: Request, res: Response) {
-    if (!/^[a-fA-F0-9]{64}$/.test(req.params.txId)) {
-      res.status(501).send(`Invalid transaction ID.`);
-      return;
-    }
-
-    const tx = mempool.getMempool()[req.params.txId];
-    if (!tx) {
-      res.status(404).send(`Transaction doesn't exist in the mempool.`);
-      return;
-    }
-
-    if (tx.cpfpChecked) {
-      res.json({
-        ancestors: tx.ancestors,
-        bestDescendant: tx.bestDescendant || null,
-      });
-      return;
-    }
-
-    const cpfpInfo = Common.setRelativesAndGetCpfpInfo(tx, mempool.getMempool());
-
-    res.json(cpfpInfo);
-  }
-
-  public getBackendInfo(req: Request, res: Response) {
-    res.json(backendInfo.getBackendInfo());
-  }
-
-  public getBisqStats(req: Request, res: Response) {
-    const result = bisq.getStats();
-    res.json(result);
-  }
-
-  public getBisqTip(req: Request, res: Response) {
-    const result = bisq.getLatestBlockHeight();
-    res.type('text/plain');
-    res.send(result.toString());
-  }
-
-  public getBisqTransaction(req: Request, res: Response) {
-    const result = bisq.getTransaction(req.params.txId);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Bisq transaction not found');
-    }
-  }
-
-  public getBisqTransactions(req: Request, res: Response) {
-    const types: string[] = [];
-    req.query.types = req.query.types || [];
-    if (!Array.isArray(req.query.types)) {
-      res.status(500).send('Types is not an array');
-      return;
-    }
-
-    for (const _type in req.query.types) {
-      if (typeof req.query.types[_type] === 'string') {
-        types.push(req.query.types[_type].toString());
-      }
-    }
-
-    const index = parseInt(req.params.index, 10) || 0;
-    const length = parseInt(req.params.length, 10) > 100 ? 100 : parseInt(req.params.length, 10) || 25;
-    const [transactions, count] = bisq.getTransactions(index, length, types);
-    res.header('X-Total-Count', count.toString());
-    res.json(transactions);
-  }
-
-  public getBisqBlock(req: Request, res: Response) {
-    const result = bisq.getBlock(req.params.hash);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Bisq block not found');
-    }
-  }
-
-  public getBisqBlocks(req: Request, res: Response) {
-    const index = parseInt(req.params.index, 10) || 0;
-    const length = parseInt(req.params.length, 10) > 100 ? 100 : parseInt(req.params.length, 10) || 25;
-    const [transactions, count] = bisq.getBlocks(index, length);
-    res.header('X-Total-Count', count.toString());
-    res.json(transactions);
-  }
-
-  public getBisqAddress(req: Request, res: Response) {
-    const result = bisq.getAddress(req.params.address.substr(1));
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Bisq address not found');
-    }
-  }
-
-  public getBisqMarketCurrencies(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'type': {
-        required: false,
-        types: ['crypto', 'fiat', 'all']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getCurrencies(p.type);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketCurrencies error'));
-    }
-  }
-
-  public getBisqMarketDepth(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getDepth(p.market);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketDepth error'));
-    }
-  }
-
-  public getBisqMarketMarkets(req: Request, res: Response) {
-    const result = bisqMarket.getMarkets();
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketMarkets error'));
-    }
-  }
-
-  public getBisqMarketTrades(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-      'timestamp_from': {
-        required: false,
-        types: ['@number']
-      },
-      'timestamp_to': {
-        required: false,
-        types: ['@number']
-      },
-      'trade_id_to': {
-        required: false,
-        types: ['@string']
-      },
-      'trade_id_from': {
-        required: false,
-        types: ['@string']
-      },
-      'direction': {
-        required: false,
-        types: ['buy', 'sell']
-      },
-      'limit': {
-        required: false,
-        types: ['@number']
-      },
-      'sort': {
-        required: false,
-        types: ['asc', 'desc']
-      }
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getTrades(p.market, p.timestamp_from,
-      p.timestamp_to, p.trade_id_from, p.trade_id_to, p.direction, p.limit, p.sort);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketTrades error'));
-    }
-  }
-
-  public getBisqMarketOffers(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-      'direction': {
-        required: false,
-        types: ['buy', 'sell']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getOffers(p.market, p.direction);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketOffers error'));
-    }
-  }
-
-  public getBisqMarketVolumes(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: false,
-        types: ['@string']
-      },
-      'interval': {
-        required: false,
-        types: ['minute', 'half_hour', 'hour', 'half_day', 'day', 'week', 'month', 'year', 'auto']
-      },
-      'timestamp_from': {
-        required: false,
-        types: ['@number']
-      },
-      'timestamp_to': {
-        required: false,
-        types: ['@number']
-      },
-      'milliseconds': {
-        required: false,
-        types: ['@boolean']
-      },
-      'timestamp': {
-        required: false,
-        types: ['no', 'yes']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getVolumes(p.market, p.timestamp_from, p.timestamp_to, p.interval, p.milliseconds, p.timestamp);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketVolumes error'));
-    }
-  }
-
-  public getBisqMarketHloc(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: true,
-        types: ['@string']
-      },
-      'interval': {
-        required: false,
-        types: ['minute', 'half_hour', 'hour', 'half_day', 'day', 'week', 'month', 'year', 'auto']
-      },
-      'timestamp_from': {
-        required: false,
-        types: ['@number']
-      },
-      'timestamp_to': {
-        required: false,
-        types: ['@number']
-      },
-      'milliseconds': {
-        required: false,
-        types: ['@boolean']
-      },
-      'timestamp': {
-        required: false,
-        types: ['no', 'yes']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getHloc(p.market, p.interval, p.timestamp_from, p.timestamp_to, p.milliseconds, p.timestamp);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketHloc error'));
-    }
-  }
-
-  public getBisqMarketTicker(req: Request, res: Response) {
-    const constraints: RequiredSpec = {
-      'market': {
-        required: false,
-        types: ['@string']
-      },
-    };
-
-    const p = this.parseRequestParameters(req.query, constraints);
-    if (p.error) {
-      res.status(400).json(this.getBisqMarketErrorResponse(p.error));
-      return;
-    }
-
-    const result = bisqMarket.getTicker(p.market);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketTicker error'));
-    }
-  }
-
-  public getBisqMarketVolumes7d(req: Request, res: Response) {
-    const result = bisqMarket.getVolumesByTime(604800);
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(500).json(this.getBisqMarketErrorResponse('getBisqMarketVolumes7d error'));
-    }
-  }
-
-  private parseRequestParameters(requestParams: object, params: RequiredSpec): { [name: string]: any; } {
-    const final = {};
-    for (const i in params) {
-      if (params.hasOwnProperty(i)) {
-        if (params[i].required && requestParams[i] === undefined) {
-          return { error: i + ' parameter missing'};
-        }
-        if (typeof requestParams[i] === 'string') {
-          const str = (requestParams[i] || '').toString().toLowerCase();
-          if (params[i].types.indexOf('@number') > -1) {
-            const number = parseInt((str).toString(), 10);
-            final[i] = number;
-          } else if (params[i].types.indexOf('@string') > -1) {
-            final[i] = str;
-          } else if (params[i].types.indexOf('@boolean') > -1) {
-            final[i] = str === 'true' || str === 'yes';
-          } else if (params[i].types.indexOf(str) > -1) {
-            final[i] = str;
-          } else {
-            return { error: i + ' parameter invalid'};
-          }
-        } else if (typeof requestParams[i] === 'number') {
-          final[i] = requestParams[i];
-        }
-      }
-    }
-    return final;
-  }
-
-  private getBisqMarketErrorResponse(message: string): MarketsApiError {
-    return {
-      'success': 0,
-      'error': message
-    };
-  }
-
-  public async getTransaction(req: Request, res: Response) {
-    try {
-      const transaction = await transactionUtils.$getTransactionExtended(req.params.txId, true);
-      res.json(transaction);
-    } catch (e) {
-      let statusCode = 500;
-      if (e instanceof Error && e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
-        statusCode = 404;
-      }
-      res.status(statusCode).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getRawTransaction(req: Request, res: Response) {
-    try {
-      const transaction: IEsploraApi.Transaction = await bitcoinApi.$getRawTransaction(req.params.txId, true);
-      res.setHeader('content-type', 'text/plain');
-      res.send(transaction.hex);
-    } catch (e) {
-      let statusCode = 500;
-      if (e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
-        statusCode = 404;
-      }
-      res.status(statusCode).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getTransactionStatus(req: Request, res: Response) {
-    try {
-      const transaction = await transactionUtils.$getTransactionExtended(req.params.txId, true);
-      res.json(transaction.status);
-    } catch (e) {
-      let statusCode = 500;
-      if (e instanceof Error && e.message && e.message.indexOf('No such mempool or blockchain transaction') > -1) {
-        statusCode = 404;
-      }
-      res.status(statusCode).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getBlock(req: Request, res: Response) {
-    try {
-      const result = await bitcoinApi.$getBlock(req.params.hash);
-      res.json(result);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getBlockHeader(req: Request, res: Response) {
-    try {
-      const blockHeader = await bitcoinApi.$getBlockHeader(req.params.hash);
-      res.setHeader('content-type', 'text/plain');
-      res.send(blockHeader);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getBlocks(req: Request, res: Response) {
-    try {
-      loadingIndicators.setProgress('blocks', 0);
-
-      const returnBlocks: IEsploraApi.Block[] = [];
-      const fromHeight = parseInt(req.params.height, 10) || blocks.getCurrentBlockHeight();
-
-      // Check if block height exist in local cache to skip the hash lookup
-      const blockByHeight = blocks.getBlocks().find((b) => b.height === fromHeight);
-      let startFromHash: string | null = null;
-      if (blockByHeight) {
-        startFromHash = blockByHeight.id;
-      } else {
-        startFromHash = await bitcoinApi.$getBlockHash(fromHeight);
-      }
-
-      let nextHash = startFromHash;
-      for (let i = 0; i < 10; i++) {
-        const localBlock = blocks.getBlocks().find((b) => b.id === nextHash);
-        if (localBlock) {
-          returnBlocks.push(localBlock);
-          nextHash = localBlock.previousblockhash;
-        } else {
-          const block = await bitcoinApi.$getBlock(nextHash);
-          returnBlocks.push(block);
-          nextHash = block.previousblockhash;
-        }
-        loadingIndicators.setProgress('blocks', i / 10 * 100);
-      }
-
-      res.json(returnBlocks);
-    } catch (e) {
-      loadingIndicators.setProgress('blocks', 100);
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getBlockTransactions(req: Request, res: Response) {
-    try {
-      loadingIndicators.setProgress('blocktxs-' + req.params.hash, 0);
-
-      const txIds = await bitcoinApi.$getTxIdsForBlock(req.params.hash);
-      const transactions: TransactionExtended[] = [];
-      const startingIndex = Math.max(0, parseInt(req.params.index || '0', 10));
-
-      const endIndex = Math.min(startingIndex + 10, txIds.length);
-      for (let i = startingIndex; i < endIndex; i++) {
-        try {
-          const transaction = await transactionUtils.$getTransactionExtended(txIds[i], true);
-          transactions.push(transaction);
-          loadingIndicators.setProgress('blocktxs-' + req.params.hash, (i + 1) / endIndex * 100);
-        } catch (e) {
-          logger.debug('getBlockTransactions error: ' + (e instanceof Error ? e.message : e));
-        }
-      }
-      res.json(transactions);
-    } catch (e) {
-      loadingIndicators.setProgress('blocktxs-' + req.params.hash, 100);
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getBlockHeight(req: Request, res: Response) {
-    try {
-      const blockHash = await bitcoinApi.$getBlockHash(parseInt(req.params.height, 10));
-      res.send(blockHash);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getAddress(req: Request, res: Response) {
-    if (config.MEMPOOL.BACKEND === 'none') {
-      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
-      return;
-    }
-
-    try {
-      const addressData = await bitcoinApi.$getAddress(req.params.address);
-      res.json(addressData);
-    } catch (e) {
-      if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
-        return res.status(413).send(e instanceof Error ? e.message : e);
-      }
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getAddressTransactions(req: Request, res: Response) {
-    if (config.MEMPOOL.BACKEND === 'none') {
-      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
-      return;
-    }
-
-    try {
-      const transactions = await bitcoinApi.$getAddressTransactions(req.params.address, req.params.txId);
-      res.json(transactions);
-    } catch (e) {
-      if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
-        return res.status(413).send(e instanceof Error ? e.message : e);
-      }
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getAdressTxChain(req: Request, res: Response) {
-    res.status(501).send('Not implemented');
-  }
-
-  public async getAddressPrefix(req: Request, res: Response) {
-    try {
-      const blockHash = await bitcoinApi.$getAddressPrefix(req.params.prefix);
-      res.send(blockHash);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getRecentMempoolTransactions(req: Request, res: Response) {
-    const latestTransactions = Object.entries(mempool.getMempool())
-      .sort((a, b) => (b[1].firstSeen || 0) - (a[1].firstSeen || 0))
-      .slice(0, 10).map((tx) => Common.stripTransaction(tx[1]));
-
-    res.json(latestTransactions);
-  }
-
-  public async getMempool(req: Request, res: Response) {
-    res.status(501).send('Not implemented');
-  }
-
-  public async getMempoolTxIds(req: Request, res: Response) {
-    try {
-      const rawMempool = await bitcoinApi.$getRawMempool();
-      res.send(rawMempool);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getBlockTipHeight(req: Request, res: Response) {
-    try {
-      const result = await bitcoinApi.$getBlockHeightTip();
-      res.json(result);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async getTxIdsForBlock(req: Request, res: Response) {
-    try {
-      const result = await bitcoinApi.$getTxIdsForBlock(req.params.hash);
-      res.json(result);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async validateAddress(req: Request, res: Response) {
-    try {
-      const result = await bitcoinClient.validateAddress(req.params.address);
-      res.json(result);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public getTransactionOutspends(req: Request, res: Response) {
-    res.status(501).send('Not implemented');
-  }
-
-  public getDifficultyChange(req: Request, res: Response) {
-    try {
-      const DATime = blocks.getLastDifficultyAdjustmentTime();
-      const previousRetarget = blocks.getPreviousDifficultyRetarget();
-      const blockHeight = blocks.getCurrentBlockHeight();
-
-      const now = new Date().getTime() / 1000;
-      const diff = now - DATime;
-      const blocksInEpoch = blockHeight % 2016;
-      const progressPercent = (blocksInEpoch >= 0) ? blocksInEpoch / 2016 * 100 : 100;
-      const remainingBlocks = 2016 - blocksInEpoch;
-      const nextRetargetHeight = blockHeight + remainingBlocks;
-
-      let difficultyChange = 0;
-      if (remainingBlocks < 1870) {
-        if (blocksInEpoch > 0) {
-          difficultyChange = (600 / (diff / blocksInEpoch ) - 1) * 100;
-        }
-        if (difficultyChange > 300) {
-          difficultyChange = 300;
-        }
-        if (difficultyChange < -75) {
-          difficultyChange = -75;
-        }
-      }
-
-      const timeAvgDiff = difficultyChange * 0.1;
-
-      let timeAvgMins = 10;
-      if (timeAvgDiff > 0) {
-        timeAvgMins -= Math.abs(timeAvgDiff);
-      } else {
-        timeAvgMins += Math.abs(timeAvgDiff);
-      }
-
-      const timeAvg = timeAvgMins * 60;
-      const remainingTime =  remainingBlocks * timeAvg;
-      const estimatedRetargetDate = remainingTime + now;
-
-      const result = {
-        progressPercent,
-        difficultyChange,
-        estimatedRetargetDate,
-        remainingBlocks,
-        remainingTime,
-        previousRetarget,
-        nextRetargetHeight,
-        timeAvg,
-      };
-      res.json(result);
-
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async $getElementsPegsByMonth(req: Request, res: Response) {
-    try {
-      const pegs = await elementsParser.$getPegDataByMonth();
-      res.json(pegs);
-    } catch (e) {
-      res.status(500).send(e instanceof Error ? e.message : e);
-    }
-  }
-
-  public async $postTransaction(req: Request, res: Response) {
-    res.setHeader('content-type', 'text/plain');
-    try {
-      let rawTx;
-      if (typeof req.body === 'object') {
-        rawTx = Object.keys(req.body)[0];
-      } else {
-        rawTx = req.body;
-      }
-      const txIdResult = await bitcoinApi.$sendRawTransaction(rawTx);
-      res.send(txIdResult);
-    } catch (e: any) {
-      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
-        : (e.message || 'Error'));
-    }
-  }
-
-  public async $postTransactionForm(req: Request, res: Response) {
-    res.setHeader('content-type', 'text/plain');
-    const matches = /tx=([a-z0-9]+)/.exec(req.body);
-    let txHex = '';
-    if (matches && matches[1]) {
-      txHex = matches[1];
-    }
-    try {
-      const txIdResult = await bitcoinClient.sendRawTransaction(txHex);
-      res.send(txIdResult);
-    } catch (e: any) {
-      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
-        : (e.message || 'Error'));
-    }
-  }
-
-  public getLiquidIcon(req: Request, res: Response) {
-    const result = icons.getIconByAssetId(req.params.assetId);
-    if (result) {
-      res.setHeader('content-type', 'image/png');
-      res.setHeader('content-length', result.length);
-      res.send(result);
-    } else {
-      res.status(404).send('Asset icon not found');
-    }
-  }
-
-  public getAllLiquidIcon(req: Request, res: Response) {
-    const result = icons.getAllIconIds();
-    if (result) {
-      res.json(result);
-    } else {
-      res.status(404).send('Asset icons not found');
-    }
-  }
-}
-
-export default new Routes();