Add regtest network support

Sanitize channel id search

.github/CODEOWNERS

@@ -0,0 +1 @@
+backend/src/api/database-migration.ts	@wiz @softsimon

.github/dependabot.yml

@@ -6,23 +6,47 @@ updates:
       interval: daily
     open-pull-requests-limit: 10
     ignore:
-      - update-types: ["version-update:semver-major"]
+      - dependency-name: "*"
+        update-types:
+          ["version-update:semver-major", "version-update:semver-patch"]
+    allow:
+      - dependency-type: "production"
+
   - package-ecosystem: npm
     directory: "/frontend"
     schedule:
       interval: daily
     open-pull-requests-limit: 10
     ignore:
-      - update-types: ["version-update:semver-major"]
+      - dependency-name: "*"
+        update-types:
+          ["version-update:semver-major", "version-update:semver-patch"]
+    allow:
+      - dependency-type: "production"
+
   - package-ecosystem: docker
     directory: "/docker/backend"
     schedule:
-      interval: daily
+      interval: weekly
     ignore:
-      - update-types: ["version-update:semver-major"]
+      - dependency-name: "*"
+        update-types:
+          ["version-update:semver-major", "version-update:semver-patch"]
+
+  - package-ecosystem: docker
+    directory: "/docker/frontend"
+    schedule:
+      interval: weekly
+    ignore:
+      - dependency-name: "*"
+        update-types:
+          ["version-update:semver-major", "version-update:semver-patch"]
+
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: daily
+      interval: weekly
     ignore:
-      - update-types: ["version-update:semver-major"]
+      - dependency-name: "*"
+        update-types:
+          ["version-update:semver-major", "version-update:semver-patch"]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
     strategy:
       matrix:
-        node: ["16.16.0", "18.5.0"]
+        node: ["16", "17", "18", "20"]
         flavor: ["dev", "prod"]
       fail-fast: false
     runs-on: "ubuntu-latest"
@@ -27,6 +27,9 @@ jobs:
           node-version: ${{ matrix.node }}
           registry-url: "https://registry.npmjs.org"
 
+      - name: Install 1.70.x Rust toolchain
+        uses: dtolnay/rust-toolchain@1.70
+
       - name: Install
         if: ${{ matrix.flavor == 'dev'}}
         run: npm ci
@@ -55,7 +58,7 @@ jobs:
     if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
     strategy:
       matrix:
-        node: ["16.15.0", "18.5.0"]
+        node: ["16", "17", "18", "20"]
         flavor: ["dev", "prod"]
       fail-fast: false
     runs-on: "ubuntu-latest"
@@ -94,3 +97,6 @@ jobs:
       - name: Build
         run: npm run build
         working-directory: ${{ matrix.node }}/${{ matrix.flavor }}/frontend
+        env: 
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+

.github/workflows/cypress.yml

@@ -1,8 +1,11 @@
 name: Cypress Tests
 
 on:
+  push:
+    branches: [master]
   pull_request:
-    types: [ opened, review_requested, synchronize ]
+    types: [opened, synchronize]
+
 jobs:
   cypress:
     if: "!contains(github.event.pull_request.labels.*.name, 'ops') && !contains(github.head_ref, 'ops/')"
@@ -24,36 +27,36 @@ jobs:
           - module: "bisq"
             spec: |
               cypress/e2e/bisq/bisq.spec.ts
-          
+
     name: E2E tests for ${{ matrix.module }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           path: ${{ matrix.module }}
-          
+
       - name: Setup node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: 16.15.0
-          cache: 'npm'
+          cache: "npm"
           cache-dependency-path: ${{ matrix.module }}/frontend/package-lock.json
 
       - name: Chrome browser tests (${{ matrix.module }})
-        uses: cypress-io/github-action@v4
+        uses: cypress-io/github-action@v5
         with:
           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: "http://localhost:4200"
           wait-on-timeout: 120
           record: true
           parallel: true
           spec: ${{ matrix.spec }}
           group: Tests on Chrome (${{ matrix.module }})
           browser: "chrome"
-          ci-build-id: '${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}'
+          ci-build-id: "${{ github.sha }}-${{ github.workflow }}-${{ github.event_name }}"
         env:
           COMMIT_INFO_MESSAGE: ${{ github.event.pull_request.title }}
           CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}

.github/workflows/get_image_digest.yml

@@ -0,0 +1,26 @@
+name: 'Print images digest'
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Image Version'
+        required: false
+        default: 'latest'
+        type: string 
+jobs:
+  print-images-sha:
+    runs-on: 'ubuntu-latest'
+    name: Print digest for images
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: digest
+
+      - name: Run script
+        working-directory: digest
+        run: |
+          sh ./docker/scripts/get_image_digest.sh $VERSION
+        env: 
+          VERSION: ${{ github.event.inputs.version }}

.github/workflows/on-tag.yml

@@ -31,7 +31,7 @@ jobs:
         run: |
           sudo swapoff /mnt/swapfile
           sudo rm -v /mnt/swapfile
-          sudo fallocate -l 10G /mnt/swapfile
+          sudo fallocate -l 13G /mnt/swapfile
           sudo chmod 600 /mnt/swapfile
           sudo mkswap /mnt/swapfile
           sudo swapon /mnt/swapfile
@@ -68,24 +68,24 @@ jobs:
         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
 
       - name: Checkout project
-        uses: actions/checkout@e2f20e631ae6d7dd3b768f56a5d2af784dd54791 # v2.5.0
+        uses: actions/checkout@v3
 
       - name: Init repo for Dockerization
         run: docker/init.sh "$TAG"
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # v2.1.0
+        uses: docker/setup-qemu-action@v2
         id: qemu
 
       - name: Setup Docker buildx action
-        uses: docker/setup-buildx-action@8c0edbc76e98fa90f69d9a2c020dcb50019dc325 # v2.2.1
+        uses: docker/setup-buildx-action@v2
         id: buildx
 
       - name: Available platforms
         run: echo ${{ steps.buildx.outputs.platforms }}
 
       - name: Cache Docker layers
-        uses: actions/cache@9b0c1fce7a93df8e3bb8926b0d6e9d89e92f20a7 # v3.0.11
+        uses: actions/cache@v3
         id: cache
         with:
           path: /tmp/.buildx-cache

.gitignore

@@ -5,3 +5,4 @@ backend/mempool-config.json
 *.swp
 frontend/src/resources/config.template.js
 frontend/src/resources/config.js
+target

.vscode/settings.json

@@ -1,4 +1,6 @@
 {
   "editor.tabSize": 2,
-  "typescript.tsdk": "./backend/node_modules/typescript/lib"
+  "typescript.preferences.importModuleSpecifier": "relative",
+  "typescript.tsdk": "./backend/node_modules/typescript/lib",
+  "rust-analyzer.procMacro.ignored": { "napi-derive": ["napi"] }
 }

Cargo.lock

@@ -0,0 +1,533 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67fc08ce920c31afb70f013dcce1bfc3a3195de6a228474e45e1f145b36f8d04"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dbe3c979c178231552ecba20214a8272df4e09f232a87aef4320cf06539aded"
+
+[[package]]
+name = "bytemuck"
+version = "1.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17febce684fd15d89027105661fec94afb475cb995fbc59d2865198446ba2eea"
+
+[[package]]
+name = "bytes"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
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+name = "convert_case"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec182b0ca2f35d8fc196cf3404988fd8b8c739a4d270ff118a398feb0cbec1ca"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "ctor"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1586fa608b1dab41f667475b4a41faec5ba680aee428bfa5de4ea520fdc6e901"
+dependencies = [
+ "quote",
+ "syn 2.0.20",
+]
+
+[[package]]
+name = "gbt"
+version = "0.1.0"
+dependencies = [
+ "bytemuck",
+ "bytes",
+ "napi",
+ "napi-build",
+ "napi-derive",
+ "priority-queue",
+ "tracing",
+ "tracing-log",
+ "tracing-subscriber",
+]
+
+[[package]]
+name = "hashbrown"
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+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
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+version = "0.2.6"
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+checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
+dependencies = [
+ "libc",
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+
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+name = "indexmap"
+version = "1.9.3"
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+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown",
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+
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+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
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+checksum = "f92be4933c13fd498862a9e02a3055f8a8d9c039ce33db97306fd5a6caa7f29b"
+
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+checksum = "b67380fd3b2fbe7527a606e18729d21c6f3951633d0500574c4dc22d2d638b9f"
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+]
+
+[[package]]
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+checksum = "b06a4cde4c0f271a446782e3eff8de789548ce57dbc8eca9292c27f4a42004b4"
+
+[[package]]
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+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata",
+]
+
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+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
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+checksum = "0955b8137a1df6f1a2e9a37d8a6656291ff0297c1a97c24e0d8425fe2312f79a"
+dependencies = [
+ "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ddad33d2d10b1ed7eb9d1f518a5674713876e97e5bb9b7345a7984fbb4f922"
+dependencies = [
+ "lazy_static",
+ "log",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30a651bc37f915e81f087d86e62a18eec5f79550c7faff886f7090b4ea757c77"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15811caf2415fb889178633e7724bad2509101cde276048e013b9def5e51fa0"
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
+
+[[package]]
+name = "valuable"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
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+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
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+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"

Cargo.toml

@@ -0,0 +1,8 @@
+[workspace]
+members = [
+	"./backend/rust-gbt",
+]
+
+[profile.release]
+lto = true
+codegen-units = 1

LICENSE

@@ -1,5 +1,5 @@
 The Mempool Open Source Project
-Copyright (c) 2019-2022 The Mempool Open Source Project Developers
+Copyright (c) 2019-2023 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

@@ -1,11 +1,13 @@
 # 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)
 
+https://user-images.githubusercontent.com/93150691/226236121-375ea64f-b4a1-4cc0-8fad-a6fb33226840.mp4
+
+<br>
+
 Mempool is the fully-featured mempool visualizer, explorer, and API service running at [mempool.space](https://mempool.space/). 
 
 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.
 
-![mempool](https://mempool.space/resources/screenshots/v2.4.0-dashboard.png)
-
 # Installation Methods
 
 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. 

backend/.dockerignore

@@ -0,0 +1 @@
+Dockerfile

backend/README.md

@@ -2,7 +2,7 @@
 
 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.
+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 only provides support for custom setups to [enterprise sponsors](https://mempool.space/enterprise).
 
 See other ways to set up Mempool on [the main README](/../../#installation-methods).
 
@@ -79,6 +79,8 @@ Query OK, 0 rows affected (0.00 sec)
 
 _Make sure to use Node.js 16.10 and npm 7._
 
+_The build process requires [Rust](https://www.rust-lang.org/tools/install) to be installed._
+
 Install dependencies with `npm` and build the backend:
 
 ```
@@ -160,7 +162,7 @@ npm install -g ts-node nodemon
 Then, run the watcher:
 
 ```
-nodemon src/index.ts --ignore cache/ --ignore pools.json
+nodemon src/index.ts --ignore cache/
 ```
 
 `nodemon` should be in npm's global binary folder. If needed, you can determine where that is with `npm -g bin`.
@@ -171,50 +173,84 @@ Helpful link: https://gist.github.com/System-Glitch/cb4e87bf1ae3fec9925725bb3ebe
 
 Run bitcoind on regtest:
    ```
-   bitcoind -regtest -rpcport=8332
+   bitcoind -regtest
    ```
 
 Create a new wallet, if needed:
    ```
-   bitcoin-cli -regtest -rpcport=8332 createwallet test
+   bitcoin-cli -regtest createwallet test
    ```
 
 Load wallet (this command may take a while if you have lot of UTXOs):
    ```
-   bitcoin-cli -regtest -rpcport=8332 loadwallet test
+   bitcoin-cli -regtest loadwallet test
    ```
 
 Get a new address:
    ```
-   address=$(./src/bitcoin-cli -regtest -rpcport=8332 getnewaddress)
+   address=$(bitcoin-cli -regtest 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
+   bitcoin-cli -regtest generatetoaddress 101 $address
    ```
 
 Send 0.1 BTC at 5 sat/vB to another address:
    ```
-   ./src/bitcoin-cli -named -regtest -rpcport=8332 sendtoaddress address=$(./src/bitcoin-cli -regtest -rpcport=8332 getnewaddress) amount=0.1 fee_rate=5
+   bitcoin-cli -named -regtest sendtoaddress address=$(bitcoin-cli -regtest getnewaddress) amount=0.1 fee_rate=5
    ```
 
 See more example of `sendtoaddress`:
    ```
-   ./src/bitcoin-cli sendtoaddress # will print the help
+   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.
+Mini script to generate random network activity (random TX count with random tx fee-rate). 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=$(./src/bitcoin-cli -regtest -rpcport=8332 getnewaddress)
+   address=$(bitcoin-cli -regtest getnewaddress)
+   bitcoin-cli -regtest generatetoaddress 101 $address
    for i in {1..1000000}
    do
-     ./src/bitcoin-cli -regtest -rpcport=8332 -named sendtoaddress address=$address amount=0.01 fee_rate=$(jot -r 1  1 100)
+      for y in $(seq 1 "$(jot -r 1 1 1000)")
+      do
+         bitcoin-cli -regtest -named sendtoaddress address=$address amount=0.01 fee_rate=$(jot -r 1 1 100)
+      done
+      bitcoin-cli -regtest generatetoaddress 1 $address
+      sleep 5
    done
    ```
 
 Generate block at regular interval (every 10 seconds in this example):
    ```
-   watch -n 10 "./src/bitcoin-cli -regtest -rpcport=8332 generatetoaddress 1 $address"
+   watch -n 10 "bitcoin-cli -regtest generatetoaddress 1 $address"
    ```
+
+### Mining pools update
+
+By default, mining pools will be not automatically updated regularly (`config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING` is set to `false`). 
+
+To manually update your mining pools, you can use the `--update-pools` command line flag when you run the nodejs backend. For example `npm run start --update-pools`. This will trigger the mining pools update and automatically re-index appropriate blocks.
+
+You can enabled the automatic mining pools update by settings `config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING` to `true` in your `mempool-config.json`.
+
+When a `coinbase tag` or `coinbase address` change is detected, all blocks tagged to the `unknown` mining pools (starting from height 130635) will be deleted from the `blocks` table. Additionaly, all blocks which were tagged to the pool which has been updated will also be deleted from the `blocks` table. Of course, those blocks will be automatically reindexed.
+
+### Re-index tables
+
+You can manually force the nodejs backend to drop all data from a specified set of tables for future re-index. This is mostly useful for the mining dashboard and the lightning explorer.
+
+Use the `--reindex` command to specify a list of comma separated table which will be truncated at start. Note that a 5 seconds delay will be observed before truncating tables in order to give you a chance to cancel (CTRL+C) in case of misuse of the command.
+
+Usage:
+```
+npm run start --reindex=blocks,hashrates
+```
+Example output:
+```
+Feb 13 14:55:27 [63246] WARN: <lightning> Indexed data for "hashrates" tables will be erased in 5 seconds (using '--reindex')
+Feb 13 14:55:32 [63246] NOTICE: <lightning> Table hashrates has been truncated
+```
+
+Reference: https://github.com/mempool/mempool/pull/1269

backend/mempool-config.sample.json

@@ -15,7 +15,6 @@
     "MEMPOOL_BLOCKS_AMOUNT": 8,
     "INDEXING_BLOCKS_AMOUNT": 11000,
     "BLOCKS_SUMMARIES_INDEXING": false,
-    "PRICE_FEED_UPDATE_INTERVAL": 600,
     "USE_SECOND_NODE_FOR_MINFEE": false,
     "EXTERNAL_ASSETS": [],
     "EXTERNAL_MAX_RETRY": 1,
@@ -23,17 +22,23 @@
     "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_URL": "https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json",
     "POOLS_JSON_TREE_URL": "https://api.github.com/repos/mempool/mining-pools/git/trees/master",
+    "AUDIT": false,
     "ADVANCED_GBT_AUDIT": false,
     "ADVANCED_GBT_MEMPOOL": false,
-    "TRANSACTION_INDEXING": false
+    "RUST_GBT": false,
+    "CPFP_INDEXING": false,
+    "DISK_CACHE_BLOCK_INTERVAL": 6,
+    "MAX_PUSH_TX_SIZE_WEIGHT": 4000000,
+    "ALLOW_UNREACHABLE": true
   },
   "CORE_RPC": {
     "HOST": "127.0.0.1",
     "PORT": 8332,
     "USERNAME": "mempool",
-    "PASSWORD": "mempool"
+    "PASSWORD": "mempool",
+    "TIMEOUT": 60000
   },
   "ELECTRUM": {
     "HOST": "127.0.0.1",
@@ -41,13 +46,16 @@
     "TLS_ENABLED": true
   },
   "ESPLORA": {
-    "REST_API_URL": "http://127.0.0.1:3000"
+    "REST_API_URL": "http://127.0.0.1:3000",
+    "UNIX_SOCKET_PATH": "/tmp/esplora-bitcoin-mainnet",
+    "RETRY_UNIX_SOCKET_AFTER": 30000
   },
   "SECOND_CORE_RPC": {
     "HOST": "127.0.0.1",
     "PORT": 8332,
     "USERNAME": "mempool",
-    "PASSWORD": "mempool"
+    "PASSWORD": "mempool",
+    "TIMEOUT": 60000
   },
   "DATABASE": {
     "ENABLED": true,
@@ -56,7 +64,8 @@
     "SOCKET": "/var/run/mysql/mysql.sock",
     "DATABASE": "mempool",
     "USERNAME": "mempool",
-    "PASSWORD": "mempool"
+    "PASSWORD": "mempool",
+    "TIMEOUT": 180000
   },
   "SYSLOG": {
     "ENABLED": true,
@@ -91,7 +100,8 @@
   "LND": {
     "TLS_CERT_PATH": "tls.cert",
     "MACAROON_PATH": "readonly.macaroon",
-    "REST_API_URL": "https://localhost:8080"
+    "REST_API_URL": "https://localhost:8080",
+    "TIMEOUT": 10000
   },
   "CLIGHTNING": {
     "SOCKET": "lightning-rpc"
@@ -115,5 +125,16 @@
     "LIQUID_ONION": "http://liquidmom47f6s3m53ebfxn47p76a6tlnxib3wp6deux7wuzotdr6cyd.onion/api/v1",
     "BISQ_URL": "https://bisq.markets/api",
     "BISQ_ONION": "http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api"
+  },
+  "REPLICATION": {
+    "ENABLED": false,
+    "AUDIT": false,
+    "AUDIT_START_HEIGHT": 774000,
+    "SERVERS": [
+      "list",
+      "of",
+      "trusted",
+      "servers"
+    ]
   }
 }

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mempool-backend",
-  "version": "2.5.0-dev",
+  "version": "3.0.0-dev",
   "description": "Bitcoin mempool visualizer and blockchain explorer backend",
   "license": "GNU Affero General Public License v3.0",
   "homepage": "https://mempool.space",
@@ -22,47 +22,50 @@
   "main": "index.ts",
   "scripts": {
     "tsc": "./node_modules/typescript/bin/tsc -p tsconfig.build.json",
-    "build": "npm run tsc && npm run create-resources",
+    "build": "npm run build-rust && 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)",
+    "package": "npm run build && rm -rf package && mv dist package && mv node_modules package && mv rust-gbt package && npm run package-rm-build-deps",
+    "package-rm-build-deps": "(cd package/node_modules; rm -r typescript @typescript-eslint @napi-rs ../rust-gbt/target ../rust-gbt/node_modules ../rust-gbt/src)",
     "start": "node --max-old-space-size=2048 dist/index.js",
-    "start-production": "node --max-old-space-size=4096 dist/index.js",
+    "start-production": "node --max-old-space-size=16384 dist/index.js",
+    "reindex-updated-pools": "npm run start-production --update-pools",
+    "reindex-all-blocks": "npm run start-production --update-pools --reindex-blocks",
     "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}\""
+    "prettier": "./node_modules/.bin/prettier --write \"src/**/*.{js,ts}\"",
+    "build-rust": "cd rust-gbt && npm install"
   },
   "dependencies": {
-    "@babel/core": "^7.20.5",
-    "@mempool/electrum-client": "^1.1.7",
-    "@types/node": "^16.11.41",
-    "axios": "~0.27.2",
-    "bitcoinjs-lib": "~6.0.2",
+    "@babel/core": "^7.21.3",
+    "@mempool/electrum-client": "1.1.9",
+    "@types/node": "^18.15.3",
+    "axios": "~1.4.0",
+    "bitcoinjs-lib": "~6.1.3",
     "crypto-js": "~4.1.1",
     "express": "~4.18.2",
-    "maxmind": "~4.3.8",
-    "mysql2": "~2.3.3",
-    "node-worker-threads-pool": "~1.5.1",
+    "maxmind": "~4.3.11",
+    "mysql2": "~3.5.2",
+    "rust-gbt": "file:./rust-gbt",
     "socks-proxy-agent": "~7.0.0",
-    "typescript": "~4.7.4",
-    "ws": "~8.11.0"
+    "typescript": "~4.9.3",
+    "ws": "~8.13.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.20.5",
+    "@babel/core": "^7.21.3",
     "@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",
+    "@types/express": "^4.17.17",
+    "@types/jest": "^29.5.0",
+    "@types/ws": "~8.5.5",
+    "@typescript-eslint/eslint-plugin": "^5.55.0",
+    "@typescript-eslint/parser": "^5.55.0",
+    "eslint": "^8.36.0",
+    "eslint-config-prettier": "^8.8.0",
+    "jest": "^29.5.0",
+    "prettier": "^3.0.0",
+    "ts-jest": "^29.1.1",
     "ts-node": "^10.9.1"
   }
 }

backend/rust-gbt/.gitignore

@@ -0,0 +1,4 @@
+*.node
+**/node_modules
+**/.DS_Store
+npm-debug.log*

backend/rust-gbt/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "gbt"
+version = "0.1.0"
+description = "An inefficient re-implementation of the getBlockTemplate algorithm in Rust"
+authors = ["mononaut"]
+edition = "2021"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+priority-queue = "1.3.2"
+bytes = "1.4.0"
+napi = { version = "2.13.2", features = ["napi8", "tokio_rt"] }
+napi-derive = "2.13.0"
+bytemuck = "1.13.1"
+tracing = "0.1.36"
+tracing-log = "0.1.3"
+tracing-subscriber = { version = "0.3.15", features = ["env-filter"]}
+
+[build-dependencies]
+napi-build = "2.0.1"

backend/rust-gbt/README.md

@@ -0,0 +1,123 @@
+# gbt
+
+**gbt:** rust implementation of the getBlockTemplate algorithm
+
+This project was bootstrapped by [napi](https://www.npmjs.com/package/@napi-rs/cli).
+
+## Installing gbt
+
+Installing gbt requires a [supported version of Node and Rust](https://github.com/napi-rs/napi-rs#platform-support).
+
+The build process also requires [Rust](https://www.rust-lang.org/tools/install) to be installed.
+
+You can install the project with npm. In the project directory, run:
+
+```sh
+$ npm install
+```
+
+This fully installs the project, including installing any dependencies and running the build.
+
+## Building gbt
+
+If you have already installed the project and only want to run the build, run:
+
+```sh
+$ npm run build
+```
+
+This command uses the [napi build](https://www.npmjs.com/package/@napi-rs/cli) utility to run the Rust build and copy the built library into `./gbt.[TARGET_TRIPLE].node`.
+
+## Exploring gbt
+
+After building gbt, you can explore its exports at the Node REPL:
+
+```sh
+$ npm install
+$ node
+> require('.').hello()
+"hello node"
+```
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `npm install`
+
+Installs the project, including running `npm run build-release`.
+
+### `npm build`
+
+Builds the Node addon (`gbt.[TARGET_TRIPLE].node`) from source.
+
+Additional [`cargo build`](https://doc.rust-lang.org/cargo/commands/cargo-build.html) arguments may be passed to `npm build` and `npm build-*` commands. For example, to enable a [cargo feature](https://doc.rust-lang.org/cargo/reference/features.html):
+
+```
+npm run build -- --feature=beetle
+```
+
+#### `npm build-debug`
+
+Alias for `npm build`.
+
+#### `npm build-release`
+
+Same as [`npm build`](#npm-build) but, builds the module with the [`release`](https://doc.rust-lang.org/cargo/reference/profiles.html#release) profile. Release builds will compile slower, but run faster.
+
+### `npm test`
+
+Runs the unit tests by calling `cargo test`. You can learn more about [adding tests to your Rust code](https://doc.rust-lang.org/book/ch11-01-writing-tests.html) from the [Rust book](https://doc.rust-lang.org/book/).
+
+## Project Layout
+
+The directory structure of this project is:
+
+```
+gbt/
+├── Cargo.toml
+├── README.md
+├── gbt.[TARGET_TRIPLE].node
+├── package.json
+├── src/
+|   └── lib.rs
+└── target/
+```
+
+### Cargo.toml
+
+The Cargo [manifest file](https://doc.rust-lang.org/cargo/reference/manifest.html), which informs the `cargo` command.
+
+### README.md
+
+This file.
+
+### gbt.\[TARGET_TRIPLE\].node
+
+The Node addon—i.e., a binary Node module—generated by building the project. This is the main module for this package, as dictated by the `"main"` key in `package.json`.
+
+Under the hood, a [Node addon](https://nodejs.org/api/addons.html) is a [dynamically-linked shared object](https://en.wikipedia.org/wiki/Library_(computing)#Shared_libraries). The `"build"` script produces this file by copying it from within the `target/` directory, which is where the Rust build produces the shared object.
+
+### package.json
+
+The npm [manifest file](https://docs.npmjs.com/cli/v7/configuring-npm/package-json), which informs the `npm` command.
+
+### src/
+
+The directory tree containing the Rust source code for the project.
+
+### src/lib.rs
+
+The Rust library's main module.
+
+### target/
+
+Binary artifacts generated by the Rust build.
+
+## Learn More
+
+To learn more about Neon, see the [Napi-RS documentation](https://napi.rs/docs/introduction/getting-started).
+
+To learn more about Rust, see the [Rust documentation](https://www.rust-lang.org).
+
+To learn more about Node, see the [Node documentation](https://nodejs.org).

backend/rust-gbt/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    napi_build::setup();
+}

backend/rust-gbt/index.d.ts

@@ -0,0 +1,45 @@
+/* tslint:disable */
+/* eslint-disable */
+
+/* auto-generated by NAPI-RS */
+
+export interface ThreadTransaction {
+  uid: number
+  order: number
+  fee: number
+  weight: number
+  sigops: number
+  effectiveFeePerVsize: number
+  inputs: Array<number>
+}
+export class GbtGenerator {
+  constructor()
+  /**
+   * # Errors
+   *
+   * Rejects if the thread panics or if the Mutex is poisoned.
+   */
+  make(mempool: Array<ThreadTransaction>, maxUid: number): Promise<GbtResult>
+  /**
+   * # Errors
+   *
+   * Rejects if the thread panics or if the Mutex is poisoned.
+   */
+  update(newTxs: Array<ThreadTransaction>, removeTxs: Array<number>, maxUid: number): Promise<GbtResult>
+}
+/**
+ * The result from calling the gbt function.
+ *
+ * This tuple contains the following:
+ *        blocks: A 2D Vector of transaction IDs (u32), the inner Vecs each represent a block.
+ * block_weights: A Vector of total weights per block.
+ *      clusters: A 2D Vector of transaction IDs representing clusters of dependent mempool transactions
+ *         rates: A Vector of tuples containing transaction IDs (u32) and effective fee per vsize (f64)
+ */
+export class GbtResult {
+  blocks: Array<Array<number>>
+  blockWeights: Array<number>
+  clusters: Array<Array<number>>
+  rates: Array<Array<number>>
+  constructor(blocks: Array<Array<number>>, blockWeights: Array<number>, clusters: Array<Array<number>>, rates: Array<Array<number>>)
+}

backend/rust-gbt/index.js

@@ -0,0 +1,258 @@
+/* tslint:disable */
+/* eslint-disable */
+/* prettier-ignore */
+
+/* auto-generated by NAPI-RS */
+
+const { existsSync, readFileSync } = require('fs')
+const { join } = require('path')
+
+const { platform, arch } = process
+
+let nativeBinding = null
+let localFileExisted = false
+let loadError = null
+
+function isMusl() {
+  // For Node 10
+  if (!process.report || typeof process.report.getReport !== 'function') {
+    try {
+      const lddPath = require('child_process').execSync('which ldd').toString().trim()
+      return readFileSync(lddPath, 'utf8').includes('musl')
+    } catch (e) {
+      return true
+    }
+  } else {
+    const { glibcVersionRuntime } = process.report.getReport().header
+    return !glibcVersionRuntime
+  }
+}
+
+switch (platform) {
+  case 'android':
+    switch (arch) {
+      case 'arm64':
+        localFileExisted = existsSync(join(__dirname, 'gbt.android-arm64.node'))
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.android-arm64.node')
+          } else {
+            nativeBinding = require('gbt-android-arm64')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      case 'arm':
+        localFileExisted = existsSync(join(__dirname, 'gbt.android-arm-eabi.node'))
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.android-arm-eabi.node')
+          } else {
+            nativeBinding = require('gbt-android-arm-eabi')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      default:
+        throw new Error(`Unsupported architecture on Android ${arch}`)
+    }
+    break
+  case 'win32':
+    switch (arch) {
+      case 'x64':
+        localFileExisted = existsSync(
+          join(__dirname, 'gbt.win32-x64-msvc.node')
+        )
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.win32-x64-msvc.node')
+          } else {
+            nativeBinding = require('gbt-win32-x64-msvc')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      case 'ia32':
+        localFileExisted = existsSync(
+          join(__dirname, 'gbt.win32-ia32-msvc.node')
+        )
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.win32-ia32-msvc.node')
+          } else {
+            nativeBinding = require('gbt-win32-ia32-msvc')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      case 'arm64':
+        localFileExisted = existsSync(
+          join(__dirname, 'gbt.win32-arm64-msvc.node')
+        )
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.win32-arm64-msvc.node')
+          } else {
+            nativeBinding = require('gbt-win32-arm64-msvc')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      default:
+        throw new Error(`Unsupported architecture on Windows: ${arch}`)
+    }
+    break
+  case 'darwin':
+    localFileExisted = existsSync(join(__dirname, 'gbt.darwin-universal.node'))
+    try {
+      if (localFileExisted) {
+        nativeBinding = require('./gbt.darwin-universal.node')
+      } else {
+        nativeBinding = require('gbt-darwin-universal')
+      }
+      break
+    } catch {}
+    switch (arch) {
+      case 'x64':
+        localFileExisted = existsSync(join(__dirname, 'gbt.darwin-x64.node'))
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.darwin-x64.node')
+          } else {
+            nativeBinding = require('gbt-darwin-x64')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      case 'arm64':
+        localFileExisted = existsSync(
+          join(__dirname, 'gbt.darwin-arm64.node')
+        )
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.darwin-arm64.node')
+          } else {
+            nativeBinding = require('gbt-darwin-arm64')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      default:
+        throw new Error(`Unsupported architecture on macOS: ${arch}`)
+    }
+    break
+  case 'freebsd':
+    if (arch !== 'x64') {
+      throw new Error(`Unsupported architecture on FreeBSD: ${arch}`)
+    }
+    localFileExisted = existsSync(join(__dirname, 'gbt.freebsd-x64.node'))
+    try {
+      if (localFileExisted) {
+        nativeBinding = require('./gbt.freebsd-x64.node')
+      } else {
+        nativeBinding = require('gbt-freebsd-x64')
+      }
+    } catch (e) {
+      loadError = e
+    }
+    break
+  case 'linux':
+    switch (arch) {
+      case 'x64':
+        if (isMusl()) {
+          localFileExisted = existsSync(
+            join(__dirname, 'gbt.linux-x64-musl.node')
+          )
+          try {
+            if (localFileExisted) {
+              nativeBinding = require('./gbt.linux-x64-musl.node')
+            } else {
+              nativeBinding = require('gbt-linux-x64-musl')
+            }
+          } catch (e) {
+            loadError = e
+          }
+        } else {
+          localFileExisted = existsSync(
+            join(__dirname, 'gbt.linux-x64-gnu.node')
+          )
+          try {
+            if (localFileExisted) {
+              nativeBinding = require('./gbt.linux-x64-gnu.node')
+            } else {
+              nativeBinding = require('gbt-linux-x64-gnu')
+            }
+          } catch (e) {
+            loadError = e
+          }
+        }
+        break
+      case 'arm64':
+        if (isMusl()) {
+          localFileExisted = existsSync(
+            join(__dirname, 'gbt.linux-arm64-musl.node')
+          )
+          try {
+            if (localFileExisted) {
+              nativeBinding = require('./gbt.linux-arm64-musl.node')
+            } else {
+              nativeBinding = require('gbt-linux-arm64-musl')
+            }
+          } catch (e) {
+            loadError = e
+          }
+        } else {
+          localFileExisted = existsSync(
+            join(__dirname, 'gbt.linux-arm64-gnu.node')
+          )
+          try {
+            if (localFileExisted) {
+              nativeBinding = require('./gbt.linux-arm64-gnu.node')
+            } else {
+              nativeBinding = require('gbt-linux-arm64-gnu')
+            }
+          } catch (e) {
+            loadError = e
+          }
+        }
+        break
+      case 'arm':
+        localFileExisted = existsSync(
+          join(__dirname, 'gbt.linux-arm-gnueabihf.node')
+        )
+        try {
+          if (localFileExisted) {
+            nativeBinding = require('./gbt.linux-arm-gnueabihf.node')
+          } else {
+            nativeBinding = require('gbt-linux-arm-gnueabihf')
+          }
+        } catch (e) {
+          loadError = e
+        }
+        break
+      default:
+        throw new Error(`Unsupported architecture on Linux: ${arch}`)
+    }
+    break
+  default:
+    throw new Error(`Unsupported OS: ${platform}, architecture: ${arch}`)
+}
+
+if (!nativeBinding) {
+  if (loadError) {
+    throw loadError
+  }
+  throw new Error(`Failed to load native binding`)
+}
+
+const { GbtGenerator, GbtResult } = nativeBinding
+
+module.exports.GbtGenerator = GbtGenerator
+module.exports.GbtResult = GbtResult

backend/rust-gbt/package-lock.json

@@ -0,0 +1,34 @@
+{
+  "name": "gbt",
+  "version": "3.0.0-dev",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "gbt",
+      "version": "3.0.0-dev",
+      "hasInstallScript": true,
+      "dependencies": {
+        "@napi-rs/cli": "^2.16.1"
+      },
+      "engines": {
+        "node": ">= 12"
+      }
+    },
+    "node_modules/@napi-rs/cli": {
+      "version": "2.16.1",
+      "resolved": "https://registry.npmjs.org/@napi-rs/cli/-/cli-2.16.1.tgz",
+      "integrity": "sha512-L0Gr5iEQIDEbvWdDr1HUaBOxBSHL1VZhWSk1oryawoT8qJIY+KGfLFelU+Qma64ivCPbxYpkfPoKYVG3rcoGIA==",
+      "bin": {
+        "napi": "scripts/index.js"
+      },
+      "engines": {
+        "node": ">= 10"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/Brooooooklyn"
+      }
+    }
+  }
+}

backend/rust-gbt/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "gbt",
+  "version": "3.0.0-dev",
+  "description": "An inefficient re-implementation of the getBlockTemplate algorithm in Rust",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "scripts": {
+    "artifacts": "napi artifacts",
+    "build": "napi build --platform",
+    "build-debug": "npm run build",
+    "build-release": "npm run build -- --release --strip",
+    "install": "npm run build-release",
+    "prepublishOnly": "napi prepublish -t npm",
+    "test": "cargo test"
+  },
+  "author": "mononaut",
+  "napi": {
+    "name": "gbt",
+    "triples": {
+      "defaults": false,
+      "additional": [
+        "x86_64-unknown-linux-gnu",
+        "x86_64-unknown-freebsd"
+      ]
+    }
+  },
+  "dependencies": {
+    "@napi-rs/cli": "^2.16.1"
+  },
+  "engines": {
+    "node": ">= 12"
+  }
+}

backend/rust-gbt/src/audit_transaction.rs

@@ -0,0 +1,220 @@
+use crate::{
+    u32_hasher_types::{u32hashset_new, U32HasherState},
+    ThreadTransaction,
+};
+use std::{
+    cmp::Ordering,
+    collections::HashSet,
+    hash::{Hash, Hasher},
+};
+
+#[allow(clippy::struct_excessive_bools)]
+#[derive(Clone, Debug)]
+pub struct AuditTransaction {
+    pub uid: u32,
+    order: u32,
+    pub fee: u64,
+    pub weight: u32,
+    // exact sigop-adjusted weight
+    pub sigop_adjusted_weight: u32,
+    // sigop-adjusted vsize rounded up the the next integer
+    pub sigop_adjusted_vsize: u32,
+    pub sigops: u32,
+    adjusted_fee_per_vsize: f64,
+    pub effective_fee_per_vsize: f64,
+    pub dependency_rate: f64,
+    pub inputs: Vec<u32>,
+    pub relatives_set_flag: bool,
+    pub ancestors: HashSet<u32, U32HasherState>,
+    pub children: HashSet<u32, U32HasherState>,
+    ancestor_fee: u64,
+    ancestor_sigop_adjusted_weight: u32,
+    ancestor_sigop_adjusted_vsize: u32,
+    ancestor_sigops: u32,
+    // Safety: Must be private to prevent NaN breaking Ord impl.
+    score: f64,
+    pub used: bool,
+    /// whether this transaction has been moved to the "modified" priority queue
+    pub modified: bool,
+    pub dirty: bool,
+}
+
+impl Hash for AuditTransaction {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.uid.hash(state);
+    }
+}
+
+impl PartialEq for AuditTransaction {
+    fn eq(&self, other: &Self) -> bool {
+        self.uid == other.uid
+    }
+}
+
+impl Eq for AuditTransaction {}
+
+#[inline]
+pub fn partial_cmp_uid_score(a: (u32, u32, f64), b: (u32, u32, f64)) -> Option<Ordering> {
+    // If either score is NaN, this is false,
+    // and partial_cmp will return None
+    if a.2 != b.2 {
+        // compare by score (sorts by ascending score)
+        a.2.partial_cmp(&b.2)
+    } else if a.1 != b.1 {
+        // tie-break by comparing partial txids (sorts by descending txid)
+        Some(b.1.cmp(&a.1))
+    } else {
+        // tie-break partial txid collisions by comparing uids (sorts by descending uid)
+        Some(b.0.cmp(&a.0))
+    }
+}
+
+impl PartialOrd for AuditTransaction {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        partial_cmp_uid_score(
+            (self.uid, self.order, self.score),
+            (other.uid, other.order, other.score),
+        )
+    }
+}
+
+impl Ord for AuditTransaction {
+    fn cmp(&self, other: &Self) -> Ordering {
+        // Safety: The only possible values for score are f64
+        // that are not NaN. This is because outside code can not
+        // freely assign score. Also, calc_new_score guarantees no NaN.
+        self.partial_cmp(other).expect("score will never be NaN")
+    }
+}
+
+#[inline]
+fn calc_fee_rate(fee: f64, vsize: f64) -> f64 {
+    fee / (if vsize == 0.0 { 1.0 } else { vsize })
+}
+
+impl AuditTransaction {
+    pub fn from_thread_transaction(tx: &ThreadTransaction) -> Self {
+        // rounded up to the nearest integer
+        let is_adjusted = tx.weight < (tx.sigops * 20);
+        let sigop_adjusted_vsize = ((tx.weight + 3) / 4).max(tx.sigops * 5);
+        let sigop_adjusted_weight = tx.weight.max(tx.sigops * 20);
+        let effective_fee_per_vsize = if is_adjusted {
+            calc_fee_rate(tx.fee, f64::from(sigop_adjusted_weight) / 4.0)
+        } else {
+            tx.effective_fee_per_vsize
+        };
+        Self {
+            uid: tx.uid,
+            order: tx.order,
+            fee: tx.fee as u64,
+            weight: tx.weight,
+            sigop_adjusted_weight,
+            sigop_adjusted_vsize,
+            sigops: tx.sigops,
+            adjusted_fee_per_vsize: calc_fee_rate(tx.fee, f64::from(sigop_adjusted_vsize)),
+            effective_fee_per_vsize,
+            dependency_rate: f64::INFINITY,
+            inputs: tx.inputs.clone(),
+            relatives_set_flag: false,
+            ancestors: u32hashset_new(),
+            children: u32hashset_new(),
+            ancestor_fee: tx.fee as u64,
+            ancestor_sigop_adjusted_weight: sigop_adjusted_weight,
+            ancestor_sigop_adjusted_vsize: sigop_adjusted_vsize,
+            ancestor_sigops: tx.sigops,
+            score: 0.0,
+            used: false,
+            modified: false,
+            dirty: effective_fee_per_vsize != tx.effective_fee_per_vsize,
+        }
+    }
+
+    #[inline]
+    pub const fn score(&self) -> f64 {
+        self.score
+    }
+
+    #[inline]
+    pub const fn order(&self) -> u32 {
+        self.order
+    }
+
+    #[inline]
+    pub const fn ancestor_sigop_adjusted_vsize(&self) -> u32 {
+        self.ancestor_sigop_adjusted_vsize
+    }
+
+    #[inline]
+    pub const fn ancestor_sigops(&self) -> u32 {
+        self.ancestor_sigops
+    }
+
+    #[inline]
+    pub fn cluster_rate(&self) -> f64 {
+        // Safety: self.ancestor_weight can never be 0.
+        // Even if it could, as it approaches 0, the value inside the min() call
+        // grows, so if we think of 0 as "grew infinitely" then dependency_rate would be
+        // the smaller of the two. If either side is NaN, the other side is returned.
+        self.dependency_rate.min(calc_fee_rate(
+            self.ancestor_fee as f64,
+            f64::from(self.ancestor_sigop_adjusted_weight) / 4.0,
+        ))
+    }
+
+    pub fn set_dirty_if_different(&mut self, cluster_rate: f64) {
+        if self.effective_fee_per_vsize != cluster_rate {
+            self.effective_fee_per_vsize = cluster_rate;
+            self.dirty = true;
+        }
+    }
+
+    /// Safety: This function must NEVER set score to NaN.
+    #[inline]
+    fn calc_new_score(&mut self) {
+        self.score = self.adjusted_fee_per_vsize.min(calc_fee_rate(
+            self.ancestor_fee as f64,
+            f64::from(self.ancestor_sigop_adjusted_vsize),
+        ));
+    }
+
+    #[inline]
+    pub fn set_ancestors(
+        &mut self,
+        ancestors: HashSet<u32, U32HasherState>,
+        total_fee: u64,
+        total_sigop_adjusted_weight: u32,
+        total_sigop_adjusted_vsize: u32,
+        total_sigops: u32,
+    ) {
+        self.ancestors = ancestors;
+        self.ancestor_fee = self.fee + total_fee;
+        self.ancestor_sigop_adjusted_weight =
+            self.sigop_adjusted_weight + total_sigop_adjusted_weight;
+        self.ancestor_sigop_adjusted_vsize = self.sigop_adjusted_vsize + total_sigop_adjusted_vsize;
+        self.ancestor_sigops = self.sigops + total_sigops;
+        self.calc_new_score();
+        self.relatives_set_flag = true;
+    }
+
+    #[inline]
+    pub fn remove_root(
+        &mut self,
+        root_txid: u32,
+        root_fee: u64,
+        root_sigop_adjusted_weight: u32,
+        root_sigop_adjusted_vsize: u32,
+        root_sigops: u32,
+        cluster_rate: f64,
+    ) -> f64 {
+        let old_score = self.score();
+        self.dependency_rate = self.dependency_rate.min(cluster_rate);
+        if self.ancestors.remove(&root_txid) {
+            self.ancestor_fee -= root_fee;
+            self.ancestor_sigop_adjusted_weight -= root_sigop_adjusted_weight;
+            self.ancestor_sigop_adjusted_vsize -= root_sigop_adjusted_vsize;
+            self.ancestor_sigops -= root_sigops;
+            self.calc_new_score();
+        }
+        old_score
+    }
+}

backend/rust-gbt/src/gbt.rs

@@ -0,0 +1,421 @@
+use priority_queue::PriorityQueue;
+use std::{cmp::Ordering, collections::HashSet, mem::ManuallyDrop};
+use tracing::{info, trace};
+
+use crate::{
+    audit_transaction::{partial_cmp_uid_score, AuditTransaction},
+    u32_hasher_types::{u32hashset_new, u32priority_queue_with_capacity, U32HasherState},
+    GbtResult, ThreadTransactionsMap,
+};
+
+const MAX_BLOCK_WEIGHT_UNITS: u32 = 4_000_000 - 4_000;
+const BLOCK_SIGOPS: u32 = 80_000;
+const BLOCK_RESERVED_WEIGHT: u32 = 4_000;
+const BLOCK_RESERVED_SIGOPS: u32 = 400;
+const MAX_BLOCKS: usize = 8;
+
+type AuditPool = Vec<Option<ManuallyDrop<AuditTransaction>>>;
+type ModifiedQueue = PriorityQueue<u32, TxPriority, U32HasherState>;
+
+#[derive(Debug)]
+struct TxPriority {
+    uid: u32,
+    order: u32,
+    score: f64,
+}
+impl PartialEq for TxPriority {
+    fn eq(&self, other: &Self) -> bool {
+        self.uid == other.uid
+    }
+}
+impl Eq for TxPriority {}
+impl PartialOrd for TxPriority {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        partial_cmp_uid_score(
+            (self.uid, self.order, self.score),
+            (other.uid, other.order, other.score),
+        )
+    }
+}
+impl Ord for TxPriority {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.partial_cmp(other).expect("score will never be NaN")
+    }
+}
+
+/// Build projected mempool blocks using an approximation of the transaction selection algorithm from Bitcoin Core.
+///
+/// See `BlockAssembler` in Bitcoin Core's
+/// [miner.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/node/miner.cpp).
+/// Ported from mempool backend's
+/// [tx-selection-worker.ts](https://github.com/mempool/mempool/blob/master/backend/src/api/tx-selection-worker.ts).
+//
+// TODO: Make gbt smaller to fix these lints.
+#[allow(clippy::too_many_lines)]
+#[allow(clippy::cognitive_complexity)]
+pub fn gbt(mempool: &mut ThreadTransactionsMap, max_uid: usize) -> GbtResult {
+    let mempool_len = mempool.len();
+    let mut audit_pool: AuditPool = Vec::with_capacity(max_uid + 1);
+    audit_pool.resize(max_uid + 1, None);
+    let mut mempool_stack: Vec<u32> = Vec::with_capacity(mempool_len);
+    let mut clusters: Vec<Vec<u32>> = Vec::new();
+    let mut block_weights: Vec<u32> = Vec::new();
+
+    info!("Initializing working structs");
+    for (uid, tx) in &mut *mempool {
+        let audit_tx = AuditTransaction::from_thread_transaction(tx);
+        // Safety: audit_pool and mempool_stack must always contain the same transactions
+        audit_pool[*uid as usize] = Some(ManuallyDrop::new(audit_tx));
+        mempool_stack.push(*uid);
+    }
+
+    info!("Building relatives graph & calculate ancestor scores");
+    for txid in &mempool_stack {
+        set_relatives(*txid, &mut audit_pool);
+    }
+    trace!("Post relative graph Audit Pool: {:#?}", audit_pool);
+
+    info!("Sorting by descending ancestor score");
+    let mut mempool_stack: Vec<(u32, u32, f64)> = mempool_stack
+        .into_iter()
+        .map(|txid| {
+            let atx = audit_pool
+                .get(txid as usize)
+                .and_then(Option::as_ref)
+                .expect("All txids are from audit_pool");
+            (txid, atx.order(), atx.score())
+        })
+        .collect();
+    mempool_stack.sort_unstable_by(|a, b| partial_cmp_uid_score(*a, *b).expect("Not NaN"));
+    let mut mempool_stack: Vec<u32> = mempool_stack.into_iter().map(|(txid, _, _)| txid).collect();
+
+    info!("Building blocks by greedily choosing the highest feerate package");
+    info!("(i.e. the package rooted in the transaction with the best ancestor score)");
+    let mut blocks: Vec<Vec<u32>> = Vec::new();
+    let mut block_weight: u32 = BLOCK_RESERVED_WEIGHT;
+    let mut block_sigops: u32 = BLOCK_RESERVED_SIGOPS;
+    // No need to be bigger than 4096 transactions for the per-block transaction Vec.
+    let initial_txes_per_block: usize = 4096.min(mempool_len);
+    let mut transactions: Vec<u32> = Vec::with_capacity(initial_txes_per_block);
+    let mut modified: ModifiedQueue = u32priority_queue_with_capacity(mempool_len);
+    let mut overflow: Vec<u32> = Vec::new();
+    let mut failures = 0;
+    while !mempool_stack.is_empty() || !modified.is_empty() {
+        // This trace log storm is big, so to make scrolling through
+        // Each iteration easier, leaving a bunch of empty rows
+        // And a header of ======
+        trace!("\n\n\n\n\n\n\n\n\n\n==================================");
+        trace!("mempool_array: {:#?}", mempool_stack);
+        trace!("clusters: {:#?}", clusters);
+        trace!("modified: {:#?}", modified);
+        trace!("audit_pool: {:#?}", audit_pool);
+        trace!("blocks: {:#?}", blocks);
+        trace!("block_weight: {:#?}", block_weight);
+        trace!("block_sigops: {:#?}", block_sigops);
+        trace!("transactions: {:#?}", transactions);
+        trace!("overflow: {:#?}", overflow);
+        trace!("failures: {:#?}", failures);
+        trace!("\n==================================");
+
+        let next_from_stack = next_valid_from_stack(&mut mempool_stack, &audit_pool);
+        let next_from_queue = next_valid_from_queue(&mut modified, &audit_pool);
+        if next_from_stack.is_none() && next_from_queue.is_none() {
+            continue;
+        }
+        let (next_tx, from_stack) = match (next_from_stack, next_from_queue) {
+            (Some(stack_tx), Some(queue_tx)) => match queue_tx.cmp(stack_tx) {
+                std::cmp::Ordering::Less => (stack_tx, true),
+                _ => (queue_tx, false),
+            },
+            (Some(stack_tx), None) => (stack_tx, true),
+            (None, Some(queue_tx)) => (queue_tx, false),
+            (None, None) => unreachable!(),
+        };
+
+        if from_stack {
+            mempool_stack.pop();
+        } else {
+            modified.pop();
+        }
+
+        if blocks.len() < (MAX_BLOCKS - 1)
+            && ((block_weight + (4 * next_tx.ancestor_sigop_adjusted_vsize())
+                >= MAX_BLOCK_WEIGHT_UNITS)
+                || (block_sigops + next_tx.ancestor_sigops() > BLOCK_SIGOPS))
+        {
+            // hold this package in an overflow list while we check for smaller options
+            overflow.push(next_tx.uid);
+            failures += 1;
+        } else {
+            let mut package: Vec<(u32, u32, usize)> = Vec::new();
+            let mut cluster: Vec<u32> = Vec::new();
+            let is_cluster: bool = !next_tx.ancestors.is_empty();
+            for ancestor_id in &next_tx.ancestors {
+                if let Some(Some(ancestor)) = audit_pool.get(*ancestor_id as usize) {
+                    package.push((*ancestor_id, ancestor.order(), ancestor.ancestors.len()));
+                }
+            }
+            package.sort_unstable_by(|a, b| -> Ordering {
+                if a.2 != b.2 {
+                    // order by ascending ancestor count
+                    a.2.cmp(&b.2)
+                } else if a.1 != b.1 {
+                    // tie-break by ascending partial txid
+                    a.1.cmp(&b.1)
+                } else {
+                    // tie-break partial txid collisions by ascending uid
+                    a.0.cmp(&b.0)
+                }
+            });
+            package.push((next_tx.uid, next_tx.order(), next_tx.ancestors.len()));
+
+            let cluster_rate = next_tx.cluster_rate();
+
+            for (txid, _, _) in &package {
+                cluster.push(*txid);
+                if let Some(Some(tx)) = audit_pool.get_mut(*txid as usize) {
+                    tx.used = true;
+                    tx.set_dirty_if_different(cluster_rate);
+                    transactions.push(tx.uid);
+                    block_weight += tx.weight;
+                    block_sigops += tx.sigops;
+                }
+                update_descendants(*txid, &mut audit_pool, &mut modified, cluster_rate);
+            }
+
+            if is_cluster {
+                clusters.push(cluster);
+            }
+
+            failures = 0;
+        }
+
+        // this block is full
+        let exceeded_package_tries =
+            failures > 1000 && block_weight > (MAX_BLOCK_WEIGHT_UNITS - BLOCK_RESERVED_WEIGHT);
+        let queue_is_empty = mempool_stack.is_empty() && modified.is_empty();
+        if (exceeded_package_tries || queue_is_empty) && blocks.len() < (MAX_BLOCKS - 1) {
+            // finalize this block
+            if !transactions.is_empty() {
+                blocks.push(transactions);
+                block_weights.push(block_weight);
+            }
+            // reset for the next block
+            transactions = Vec::with_capacity(initial_txes_per_block);
+            block_weight = BLOCK_RESERVED_WEIGHT;
+            block_sigops = BLOCK_RESERVED_SIGOPS;
+            failures = 0;
+            // 'overflow' packages didn't fit in this block, but are valid candidates for the next
+            overflow.reverse();
+            for overflowed in &overflow {
+                if let Some(Some(overflowed_tx)) = audit_pool.get(*overflowed as usize) {
+                    if overflowed_tx.modified {
+                        modified.push(
+                            *overflowed,
+                            TxPriority {
+                                uid: *overflowed,
+                                order: overflowed_tx.order(),
+                                score: overflowed_tx.score(),
+                            },
+                        );
+                    } else {
+                        mempool_stack.push(*overflowed);
+                    }
+                }
+            }
+            overflow = Vec::new();
+        }
+    }
+    info!("add the final unbounded block if it contains any transactions");
+    if !transactions.is_empty() {
+        blocks.push(transactions);
+        block_weights.push(block_weight);
+    }
+
+    info!("make a list of dirty transactions and their new rates");
+    let mut rates: Vec<Vec<f64>> = Vec::new();
+    for (uid, thread_tx) in mempool {
+        // Takes ownership of the audit_tx and replaces with None
+        if let Some(Some(audit_tx)) = audit_pool.get_mut(*uid as usize).map(Option::take) {
+            trace!("txid: {}, is_dirty: {}", uid, audit_tx.dirty);
+            if audit_tx.dirty {
+                rates.push(vec![f64::from(*uid), audit_tx.effective_fee_per_vsize]);
+                thread_tx.effective_fee_per_vsize = audit_tx.effective_fee_per_vsize;
+            }
+            // Drops the AuditTransaction manually
+            // There are no audit_txs that are not in the mempool HashMap
+            // So there is guaranteed to be no memory leaks.
+            ManuallyDrop::into_inner(audit_tx);
+        }
+    }
+    trace!("\n\n\n\n\n====================");
+    trace!("blocks: {:#?}", blocks);
+    trace!("clusters: {:#?}", clusters);
+    trace!("rates: {:#?}\n====================\n\n\n\n\n", rates);
+
+    GbtResult {
+        blocks,
+        block_weights,
+        clusters,
+        rates,
+    }
+}
+
+fn next_valid_from_stack<'a>(
+    mempool_stack: &mut Vec<u32>,
+    audit_pool: &'a AuditPool,
+) -> Option<&'a AuditTransaction> {
+    while let Some(next_txid) = mempool_stack.last() {
+        match audit_pool.get(*next_txid as usize) {
+            Some(Some(tx)) if !tx.used && !tx.modified => {
+                return Some(tx);
+            }
+            _ => {
+                mempool_stack.pop();
+            }
+        }
+    }
+    None
+}
+
+fn next_valid_from_queue<'a>(
+    queue: &mut ModifiedQueue,
+    audit_pool: &'a AuditPool,
+) -> Option<&'a AuditTransaction> {
+    while let Some((next_txid, _)) = queue.peek() {
+        match audit_pool.get(*next_txid as usize) {
+            Some(Some(tx)) if !tx.used => {
+                return Some(tx);
+            }
+            _ => {
+                queue.pop();
+            }
+        }
+    }
+    None
+}
+
+fn set_relatives(txid: u32, audit_pool: &mut AuditPool) {
+    let mut parents: HashSet<u32, U32HasherState> = u32hashset_new();
+    if let Some(Some(tx)) = audit_pool.get(txid as usize) {
+        if tx.relatives_set_flag {
+            return;
+        }
+        for input in &tx.inputs {
+            parents.insert(*input);
+        }
+    } else {
+        return;
+    }
+
+    let mut ancestors: HashSet<u32, U32HasherState> = u32hashset_new();
+    for parent_id in &parents {
+        set_relatives(*parent_id, audit_pool);
+
+        if let Some(Some(parent)) = audit_pool.get_mut(*parent_id as usize) {
+            // Safety: ancestors must always contain only txes in audit_pool
+            ancestors.insert(*parent_id);
+            parent.children.insert(txid);
+            for ancestor in &parent.ancestors {
+                ancestors.insert(*ancestor);
+            }
+        }
+    }
+
+    let mut total_fee: u64 = 0;
+    let mut total_sigop_adjusted_weight: u32 = 0;
+    let mut total_sigop_adjusted_vsize: u32 = 0;
+    let mut total_sigops: u32 = 0;
+
+    for ancestor_id in &ancestors {
+        let Some(ancestor) = audit_pool
+            .get(*ancestor_id as usize)
+            .expect("audit_pool contains all ancestors") else { todo!() };
+        total_fee += ancestor.fee;
+        total_sigop_adjusted_weight += ancestor.sigop_adjusted_weight;
+        total_sigop_adjusted_vsize += ancestor.sigop_adjusted_vsize;
+        total_sigops += ancestor.sigops;
+    }
+
+    if let Some(Some(tx)) = audit_pool.get_mut(txid as usize) {
+        tx.set_ancestors(
+            ancestors,
+            total_fee,
+            total_sigop_adjusted_weight,
+            total_sigop_adjusted_vsize,
+            total_sigops,
+        );
+    }
+}
+
+// iterate over remaining descendants, removing the root as a valid ancestor & updating the ancestor score
+fn update_descendants(
+    root_txid: u32,
+    audit_pool: &mut AuditPool,
+    modified: &mut ModifiedQueue,
+    cluster_rate: f64,
+) {
+    let mut visited: HashSet<u32, U32HasherState> = u32hashset_new();
+    let mut descendant_stack: Vec<u32> = Vec::new();
+    let root_fee: u64;
+    let root_sigop_adjusted_weight: u32;
+    let root_sigop_adjusted_vsize: u32;
+    let root_sigops: u32;
+    if let Some(Some(root_tx)) = audit_pool.get(root_txid as usize) {
+        for descendant_id in &root_tx.children {
+            if !visited.contains(descendant_id) {
+                descendant_stack.push(*descendant_id);
+                visited.insert(*descendant_id);
+            }
+        }
+        root_fee = root_tx.fee;
+        root_sigop_adjusted_weight = root_tx.sigop_adjusted_weight;
+        root_sigop_adjusted_vsize = root_tx.sigop_adjusted_vsize;
+        root_sigops = root_tx.sigops;
+    } else {
+        return;
+    }
+    while let Some(next_txid) = descendant_stack.pop() {
+        if let Some(Some(descendant)) = audit_pool.get_mut(next_txid as usize) {
+            // remove root tx as ancestor
+            let old_score = descendant.remove_root(
+                root_txid,
+                root_fee,
+                root_sigop_adjusted_weight,
+                root_sigop_adjusted_vsize,
+                root_sigops,
+                cluster_rate,
+            );
+            // add to priority queue or update priority if score has changed
+            if descendant.score() < old_score {
+                descendant.modified = true;
+                modified.push_decrease(
+                    descendant.uid,
+                    TxPriority {
+                        uid: descendant.uid,
+                        order: descendant.order(),
+                        score: descendant.score(),
+                    },
+                );
+            } else if descendant.score() > old_score {
+                descendant.modified = true;
+                modified.push_increase(
+                    descendant.uid,
+                    TxPriority {
+                        uid: descendant.uid,
+                        order: descendant.order(),
+                        score: descendant.score(),
+                    },
+                );
+            }
+
+            // add this node's children to the stack
+            for child_id in &descendant.children {
+                if !visited.contains(child_id) {
+                    descendant_stack.push(*child_id);
+                    visited.insert(*child_id);
+                }
+            }
+        }
+    }
+}

backend/rust-gbt/src/lib.rs

@@ -0,0 +1,177 @@
+#![warn(clippy::all)]
+#![warn(clippy::pedantic)]
+#![warn(clippy::nursery)]
+#![allow(clippy::cast_precision_loss)]
+#![allow(clippy::cast_possible_truncation)]
+#![allow(clippy::cast_sign_loss)]
+#![allow(clippy::float_cmp)]
+
+use napi::bindgen_prelude::Result;
+use napi_derive::napi;
+use thread_transaction::ThreadTransaction;
+use tracing::{debug, info, trace};
+use tracing_log::LogTracer;
+use tracing_subscriber::{EnvFilter, FmtSubscriber};
+
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+
+mod audit_transaction;
+mod gbt;
+mod thread_transaction;
+mod u32_hasher_types;
+
+use u32_hasher_types::{u32hashmap_with_capacity, U32HasherState};
+
+/// This is the initial capacity of the `GbtGenerator` struct's inner `HashMap`.
+///
+/// Note: This doesn't *have* to be a power of 2. (uwu)
+const STARTING_CAPACITY: usize = 1_048_576;
+
+type ThreadTransactionsMap = HashMap<u32, ThreadTransaction, U32HasherState>;
+
+#[napi]
+pub struct GbtGenerator {
+    thread_transactions: Arc<Mutex<ThreadTransactionsMap>>,
+}
+
+#[napi::module_init]
+fn init() {
+    // Set all `tracing` logs to print to STDOUT
+    // Note: Passing RUST_LOG env variable to the node process
+    //       will change the log level for the rust module.
+    tracing::subscriber::set_global_default(
+        FmtSubscriber::builder()
+            .with_env_filter(EnvFilter::from_default_env())
+            .with_ansi(
+                // Default to no-color logs.
+                // Setting RUST_LOG_COLOR to 1 or true|TRUE|True etc.
+                // will enable color
+                std::env::var("RUST_LOG_COLOR")
+                    .map(|s| ["1", "true"].contains(&&*s.to_lowercase()))
+                    .unwrap_or(false),
+            )
+            .finish(),
+    )
+    .expect("Logging subscriber failed");
+    // Convert all `log` logs into `tracing` events
+    LogTracer::init().expect("Legacy log subscriber failed");
+}
+
+#[napi]
+impl GbtGenerator {
+    #[napi(constructor)]
+    #[allow(clippy::new_without_default)]
+    #[must_use]
+    pub fn new() -> Self {
+        debug!("Created new GbtGenerator");
+        Self {
+            thread_transactions: Arc::new(Mutex::new(u32hashmap_with_capacity(STARTING_CAPACITY))),
+        }
+    }
+
+    /// # Errors
+    ///
+    /// Rejects if the thread panics or if the Mutex is poisoned.
+    #[napi]
+    pub async fn make(&self, mempool: Vec<ThreadTransaction>, max_uid: u32) -> Result<GbtResult> {
+        trace!("make: Current State {:#?}", self.thread_transactions);
+        run_task(
+            Arc::clone(&self.thread_transactions),
+            max_uid as usize,
+            move |map| {
+                for tx in mempool {
+                    map.insert(tx.uid, tx);
+                }
+            },
+        )
+        .await
+    }
+
+    /// # Errors
+    ///
+    /// Rejects if the thread panics or if the Mutex is poisoned.
+    #[napi]
+    pub async fn update(
+        &self,
+        new_txs: Vec<ThreadTransaction>,
+        remove_txs: Vec<u32>,
+        max_uid: u32,
+    ) -> Result<GbtResult> {
+        trace!("update: Current State {:#?}", self.thread_transactions);
+        run_task(
+            Arc::clone(&self.thread_transactions),
+            max_uid as usize,
+            move |map| {
+                for tx in new_txs {
+                    map.insert(tx.uid, tx);
+                }
+                for txid in &remove_txs {
+                    map.remove(txid);
+                }
+            },
+        )
+        .await
+    }
+}
+
+/// The result from calling the gbt function.
+///
+/// This tuple contains the following:
+///        blocks: A 2D Vector of transaction IDs (u32), the inner Vecs each represent a block.
+/// block_weights: A Vector of total weights per block.
+///      clusters: A 2D Vector of transaction IDs representing clusters of dependent mempool transactions
+///         rates: A Vector of tuples containing transaction IDs (u32) and effective fee per vsize (f64)
+#[napi(constructor)]
+pub struct GbtResult {
+    pub blocks: Vec<Vec<u32>>,
+    pub block_weights: Vec<u32>,
+    pub clusters: Vec<Vec<u32>>,
+    pub rates: Vec<Vec<f64>>, // Tuples not supported. u32 fits inside f64
+}
+
+/// All on another thread, this runs an arbitrary task in between
+/// taking the lock and running gbt.
+///
+/// Rather than filling / updating the `HashMap` on the main thread,
+/// this allows for `HashMap` modifying tasks to be run before running and returning gbt results.
+///
+/// `thread_transactions` is a cloned `Arc` of the `Mutex` for the `HashMap` state.
+/// `callback` is a `'static + Send` `FnOnce` closure/function that takes a mutable reference
+/// to the `HashMap` as the only argument. (A move closure is recommended to meet the bounds)
+async fn run_task<F>(
+    thread_transactions: Arc<Mutex<ThreadTransactionsMap>>,
+    max_uid: usize,
+    callback: F,
+) -> Result<GbtResult>
+where
+    F: FnOnce(&mut ThreadTransactionsMap) + Send + 'static,
+{
+    debug!("Spawning thread...");
+    let handle = napi::tokio::task::spawn_blocking(move || {
+        debug!(
+            "Getting lock for thread_transactions from thread {:?}...",
+            std::thread::current().id()
+        );
+        let mut map = thread_transactions
+            .lock()
+            .map_err(|_| napi::Error::from_reason("THREAD_TRANSACTIONS Mutex poisoned"))?;
+        callback(&mut map);
+
+        info!("Starting gbt algorithm for {} elements...", map.len());
+        let result = gbt::gbt(&mut map, max_uid);
+        info!("Finished gbt algorithm for {} elements...", map.len());
+
+        debug!(
+            "Releasing lock for thread_transactions from thread {:?}...",
+            std::thread::current().id()
+        );
+        drop(map);
+
+        Ok(result)
+    });
+
+    handle
+        .await
+        .map_err(|_| napi::Error::from_reason("thread panicked"))?
+}

backend/rust-gbt/src/thread_transaction.rs

@@ -0,0 +1,13 @@
+use napi_derive::napi;
+
+#[derive(Debug)]
+#[napi(object)]
+pub struct ThreadTransaction {
+    pub uid: u32,
+    pub order: u32,
+    pub fee: f64,
+    pub weight: u32,
+    pub sigops: u32,
+    pub effective_fee_per_vsize: f64,
+    pub inputs: Vec<u32>,
+}

backend/rust-gbt/src/u32_hasher_types.rs

@@ -0,0 +1,132 @@
+use priority_queue::PriorityQueue;
+use std::{
+    collections::{HashMap, HashSet},
+    fmt::Debug,
+    hash::{BuildHasher, Hasher},
+};
+
+/// This is the only way to create a `HashMap` with the `U32HasherState` and capacity
+pub fn u32hashmap_with_capacity<V>(capacity: usize) -> HashMap<u32, V, U32HasherState> {
+    HashMap::with_capacity_and_hasher(capacity, U32HasherState(()))
+}
+
+/// This is the only way to create a `PriorityQueue` with the `U32HasherState` and capacity
+pub fn u32priority_queue_with_capacity<V: Ord>(
+    capacity: usize,
+) -> PriorityQueue<u32, V, U32HasherState> {
+    PriorityQueue::with_capacity_and_hasher(capacity, U32HasherState(()))
+}
+
+/// This is the only way to create a `HashSet` with the `U32HasherState`
+pub fn u32hashset_new() -> HashSet<u32, U32HasherState> {
+    HashSet::with_hasher(U32HasherState(()))
+}
+
+/// A private unit type is contained so no one can make an instance of it.
+#[derive(Clone)]
+pub struct U32HasherState(());
+
+impl Debug for U32HasherState {
+    fn fmt(&self, _: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        Ok(())
+    }
+}
+
+impl BuildHasher for U32HasherState {
+    type Hasher = U32Hasher;
+
+    fn build_hasher(&self) -> Self::Hasher {
+        U32Hasher(0)
+    }
+}
+
+/// This also can't be created outside this module due to private field.
+pub struct U32Hasher(u32);
+
+impl Hasher for U32Hasher {
+    fn finish(&self) -> u64 {
+        // Safety: Two u32s next to each other will make a u64
+        bytemuck::cast([self.0, 0])
+    }
+
+    fn write(&mut self, bytes: &[u8]) {
+        // Assert in debug builds (testing too) that only 4 byte keys (u32, i32, f32, etc.) run
+        debug_assert!(bytes.len() == 4);
+        // Safety: We know that the size of the key is 4 bytes
+        // We also know that the only way to get an instance of HashMap using this "hasher"
+        // is through the public functions in this module which set the key type to u32.
+        self.0 = *bytemuck::from_bytes(bytes);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::U32HasherState;
+    use priority_queue::PriorityQueue;
+    use std::collections::HashMap;
+
+    #[test]
+    fn test_hashmap() {
+        let mut hm: HashMap<u32, String, U32HasherState> = HashMap::with_hasher(U32HasherState(()));
+
+        // Testing basic operations with the custom hasher
+        hm.insert(0, String::from("0"));
+        hm.insert(42, String::from("42"));
+        hm.insert(256, String::from("256"));
+        hm.insert(u32::MAX, String::from("MAX"));
+        hm.insert(u32::MAX >> 2, String::from("MAX >> 2"));
+
+        assert_eq!(hm.get(&0), Some(&String::from("0")));
+        assert_eq!(hm.get(&42), Some(&String::from("42")));
+        assert_eq!(hm.get(&256), Some(&String::from("256")));
+        assert_eq!(hm.get(&u32::MAX), Some(&String::from("MAX")));
+        assert_eq!(hm.get(&(u32::MAX >> 2)), Some(&String::from("MAX >> 2")));
+        assert_eq!(hm.get(&(u32::MAX >> 4)), None);
+        assert_eq!(hm.get(&3), None);
+        assert_eq!(hm.get(&43), None);
+    }
+
+    #[test]
+    fn test_priority_queue() {
+        let mut pq: PriorityQueue<u32, i32, U32HasherState> =
+            PriorityQueue::with_hasher(U32HasherState(()));
+
+        // Testing basic operations with the custom hasher
+        assert_eq!(pq.push(1, 5), None);
+        assert_eq!(pq.push(2, -10), None);
+        assert_eq!(pq.push(3, 7), None);
+        assert_eq!(pq.push(4, 20), None);
+        assert_eq!(pq.push(u32::MAX, -42), None);
+
+        assert_eq!(pq.push_increase(1, 4), Some(4));
+        assert_eq!(pq.push_increase(2, -8), Some(-10));
+        assert_eq!(pq.push_increase(3, 5), Some(5));
+        assert_eq!(pq.push_increase(4, 21), Some(20));
+        assert_eq!(pq.push_increase(u32::MAX, -99), Some(-99));
+        assert_eq!(pq.push_increase(42, 1337), None);
+
+        assert_eq!(pq.push_decrease(1, 4), Some(5));
+        assert_eq!(pq.push_decrease(2, -10), Some(-8));
+        assert_eq!(pq.push_decrease(3, 5), Some(7));
+        assert_eq!(pq.push_decrease(4, 20), Some(21));
+        assert_eq!(pq.push_decrease(u32::MAX, 100), Some(100));
+        assert_eq!(pq.push_decrease(69, 420), None);
+
+        assert_eq!(pq.peek(), Some((&42, &1337)));
+        assert_eq!(pq.pop(), Some((42, 1337)));
+        assert_eq!(pq.peek(), Some((&69, &420)));
+        assert_eq!(pq.pop(), Some((69, 420)));
+        assert_eq!(pq.peek(), Some((&4, &20)));
+        assert_eq!(pq.pop(), Some((4, 20)));
+        assert_eq!(pq.peek(), Some((&3, &5)));
+        assert_eq!(pq.pop(), Some((3, 5)));
+        assert_eq!(pq.peek(), Some((&1, &4)));
+        assert_eq!(pq.pop(), Some((1, 4)));
+        assert_eq!(pq.peek(), Some((&2, &-10)));
+        assert_eq!(pq.pop(), Some((2, -10)));
+        assert_eq!(pq.peek(), Some((&u32::MAX, &-42)));
+        assert_eq!(pq.pop(), Some((u32::MAX, -42)));
+        assert_eq!(pq.peek(), None);
+        assert_eq!(pq.pop(), None);
+    }
+}

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

@@ -3,12 +3,11 @@
     "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,
+    "AUTOMATIC_BLOCK_REINDEXING": false,
     "POLL_RATE_MS": 3,
     "CACHE_DIR": "__MEMPOOL_CACHE_DIR__",
     "CLEAR_PROTECTION_MINUTES": 4,
@@ -16,9 +15,8 @@
     "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_ASSETS": [],
     "EXTERNAL_MAX_RETRY": 12,
     "EXTERNAL_RETRY_INTERVAL": 13,
     "USER_AGENT": "__MEMPOOL_USER_AGENT__",
@@ -26,15 +24,22 @@
     "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__"
+    "AUDIT": true,
+    "ADVANCED_GBT_AUDIT": true,
+    "ADVANCED_GBT_MEMPOOL": true,
+    "RUST_GBT": false,
+    "CPFP_INDEXING": true,
+    "MAX_BLOCKS_BULK_QUERY": 999,
+    "DISK_CACHE_BLOCK_INTERVAL": 999,
+    "MAX_PUSH_TX_SIZE_WEIGHT": 4000000,
+    "ALLOW_UNREACHABLE": true
   },
   "CORE_RPC": {
     "HOST": "__CORE_RPC_HOST__",
     "PORT": 15,
     "USERNAME": "__CORE_RPC_USERNAME__",
-    "PASSWORD": "__CORE_RPC_PASSWORD__"
+    "PASSWORD": "__CORE_RPC_PASSWORD__",
+    "TIMEOUT": 1000
   },
   "ELECTRUM": {
     "HOST": "__ELECTRUM_HOST__",
@@ -42,13 +47,16 @@
     "TLS_ENABLED": true
   },
   "ESPLORA": {
-    "REST_API_URL": "__ESPLORA_REST_API_URL__"
+    "REST_API_URL": "__ESPLORA_REST_API_URL__",
+    "UNIX_SOCKET_PATH": "__ESPLORA_UNIX_SOCKET_PATH__",
+    "RETRY_UNIX_SOCKET_AFTER": 888
   },
   "SECOND_CORE_RPC": {
     "HOST": "__SECOND_CORE_RPC_HOST__",
     "PORT": 17,
     "USERNAME": "__SECOND_CORE_RPC_USERNAME__",
-    "PASSWORD": "__SECOND_CORE_RPC_PASSWORD__"
+    "PASSWORD": "__SECOND_CORE_RPC_PASSWORD__",
+    "TIMEOUT": 2000
   },
   "DATABASE": {
     "ENABLED": false,
@@ -57,7 +65,8 @@
     "PORT": 18,
     "DATABASE": "__DATABASE_DATABASE__",
     "USERNAME": "__DATABASE_USERNAME__",
-    "PASSWORD": "__DATABASE_PASSWORD__"
+    "PASSWORD": "__DATABASE_PASSWORD__",
+    "TIMEOUT": 3000
   },
   "SYSLOG": {
     "ENABLED": false,
@@ -95,21 +104,28 @@
     "BISQ_ONION": "__EXTERNAL_DATA_SERVER_BISQ_ONION__"
   },
   "LIGHTNING": {
-    "ENABLED": "__LIGHTNING_ENABLED__",
+    "ENABLED": true,
     "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__"
+    "FORENSICS_RATE_LIMIT": 1234
   },
   "LND": {
     "TLS_CERT_PATH": "",
     "MACAROON_PATH": "",
-    "REST_API_URL": "https://localhost:8080"
+    "REST_API_URL": "https://localhost:8080",
+    "TIMEOUT": 10000
   },
   "CLIGHTNING": {
     "SOCKET": "__CLIGHTNING_SOCKET__"
+  },
+  "REPLICATION": {
+    "ENABLED": false,
+    "AUDIT": false,
+    "AUDIT_START_HEIGHT": 774000,
+    "SERVERS": []
   }
 }

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

@@ -14,18 +14,20 @@ describe('Mempool Difficulty Adjustment', () => {
           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
+          0,                              // Latest block timestamp in seconds (only used if difficulty already locked in)
         ],
         { // Expected Result
           progressPercent: 9.027777777777777,
-          difficultyChange: 12.562233927411782,
+          difficultyChange: 13.180707740199772,
           estimatedRetargetDate: 1661895424692,
           remainingBlocks: 1834,
           remainingTime: 977591692,
           previousRetarget: 0.6280047707459726,
+          previousTime: 1660820820,
           nextRetargetHeight: 751968,
           timeAvg: 533038,
           timeOffset: 0,
+          expectedBlocks: 161.68833333333333,
         },
       ],
       [ // Vector 2 (testnet)
@@ -39,15 +41,40 @@ describe('Mempool Difficulty Adjustment', () => {
         ],
         { // Expected Result is same other than timeOffset
           progressPercent: 9.027777777777777,
-          difficultyChange: 12.562233927411782,
+          difficultyChange: 13.180707740199772,
           estimatedRetargetDate: 1661895424692,
           remainingBlocks: 1834,
           remainingTime: 977591692,
+          previousTime: 1660820820,
           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
+          expectedBlocks: 161.68833333333333,
+        },
+      ],
+      [ // Vector 3 (mainnet lock-in (epoch ending 788255))
+        [ // Inputs
+          dt('2023-04-20T09:57:33.000Z'), // Last DA time (in seconds)
+          dt('2023-05-04T14:54:09.000Z'), // Current time (now) (in seconds)
+          788255,                         // Current block height
+          1.7220298879531821,             // Previous retarget % (Passed through)
+          'mainnet',                      // Network (if testnet, next value is non-zero)
+          dt('2023-05-04T14:54:26.000Z'), // Latest block timestamp in seconds
+        ],
+        { // Expected Result
+          progressPercent: 99.95039682539682,
+          difficultyChange: -1.4512637555574193,
+          estimatedRetargetDate: 1683212658129,
+          remainingBlocks: 1,
+          remainingTime: 609129,
+          previousRetarget: 1.7220298879531821,
+          previousTime: 1681984653,
+          nextRetargetHeight: 788256,
+          timeAvg: 609129,
+          timeOffset: 0,
+          expectedBlocks: 2045.66,
         },
       ],
     ] as [[number, number, number, number, string, number], DifficultyAdjustment][];

backend/src/__tests__/config.test.ts

@@ -29,7 +29,6 @@ describe('Mempool Backend Config', () => {
         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,
@@ -37,28 +36,36 @@ describe('Mempool Backend Config', () => {
         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',
+        POOLS_JSON_URL: 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json',
+        AUDIT: false,
         ADVANCED_GBT_AUDIT: false,
         ADVANCED_GBT_MEMPOOL: false,
-        TRANSACTION_INDEXING: false,
+        RUST_GBT: false,
+        CPFP_INDEXING: false,
+        MAX_BLOCKS_BULK_QUERY: 0,
+        DISK_CACHE_BLOCK_INTERVAL: 6,
+        MAX_PUSH_TX_SIZE_WEIGHT: 400000,
+        ALLOW_UNREACHABLE: true,
       });
 
       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.ESPLORA).toStrictEqual({ REST_API_URL: 'http://127.0.0.1:3000', UNIX_SOCKET_PATH: null, RETRY_UNIX_SOCKET_AFTER: 30000 });
 
       expect(config.CORE_RPC).toStrictEqual({
         HOST: '127.0.0.1',
         PORT: 8332,
         USERNAME: 'mempool',
-        PASSWORD: 'mempool'
+        PASSWORD: 'mempool',
+        TIMEOUT: 60000
       });
 
       expect(config.SECOND_CORE_RPC).toStrictEqual({
         HOST: '127.0.0.1',
         PORT: 8332,
         USERNAME: 'mempool',
-        PASSWORD: 'mempool'
+        PASSWORD: 'mempool',
+        TIMEOUT: 60000
       });
 
       expect(config.DATABASE).toStrictEqual({
@@ -68,7 +75,8 @@ describe('Mempool Backend Config', () => {
         PORT: 3306,
         DATABASE: 'mempool',
         USERNAME: 'mempool',
-        PASSWORD: 'mempool'
+        PASSWORD: 'mempool',
+        TIMEOUT: 180000,
       });
 
       expect(config.SYSLOG).toStrictEqual({
@@ -105,6 +113,20 @@ describe('Mempool Backend Config', () => {
         BISQ_URL: 'https://bisq.markets/api',
         BISQ_ONION: 'http://bisqmktse2cabavbr2xjq7xw3h6g5ottemo5rolfcwt6aly6tp5fdryd.onion/api'
       });
+
+      expect(config.MAXMIND).toStrictEqual({
+        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'
+      });
+
+      expect(config.REPLICATION).toStrictEqual({
+        ENABLED: false,
+        AUDIT: false,
+        AUDIT_START_HEIGHT: 774000,
+        SERVERS: []
+      });
     });
   });
 
@@ -140,4 +162,94 @@ describe('Mempool Backend Config', () => {
       expect(config.EXTERNAL_DATA_SERVER).toStrictEqual(fixture.EXTERNAL_DATA_SERVER);
     });
   });
+
+  test('should ensure the docker start.sh script has default values', () => {
+    jest.isolateModules(() => {
+      const startSh = fs.readFileSync(`${__dirname}/../../../docker/backend/start.sh`, 'utf-8');
+      const fixture = JSON.parse(fs.readFileSync(`${__dirname}/../__fixtures__/mempool-config.template.json`, 'utf8'));
+
+      function parseJson(jsonObj, root?) {
+        for (const [key, value] of Object.entries(jsonObj)) {
+          // We have a few cases where we can't follow the pattern
+          if (root === 'MEMPOOL' && key === 'HTTP_PORT') {
+            console.log('skipping check for MEMPOOL_HTTP_PORT');
+            return;
+          }
+          switch (typeof value) {
+            case 'object': {
+              if (Array.isArray(value)) {
+                return;
+              } else {
+                parseJson(value, key);
+              }
+              break;
+            }
+            default: {
+              //The flattened string, i.e, __MEMPOOL_ENABLED__
+              const replaceStr = `${root ? '__' + root + '_' : '__'}${key}__`;
+
+              //The string used as the environment variable, i.e, MEMPOOL_ENABLED
+              const envVarStr = `${root ? root : ''}_${key}`;
+
+              //The string used as the default value, to be checked as a regex, i.e, __MEMPOOL_ENABLED__=${MEMPOOL_ENABLED:=(.*)}
+              const defaultEntry = replaceStr + '=' + '\\${' + envVarStr + ':=(.*)' + '}';
+
+              console.log(`looking for ${defaultEntry} in the start.sh script`);
+              const re = new RegExp(defaultEntry);
+              expect(startSh).toMatch(re);
+
+              //The string that actually replaces the values in the config file
+              const sedStr = 'sed -i "s!' + replaceStr + '!${' + replaceStr + '}!g" mempool-config.json';
+              console.log(`looking for ${sedStr} in the start.sh script`);
+              expect(startSh).toContain(sedStr);
+              break;
+            }
+          }
+        }
+      }
+      parseJson(fixture);
+    });
+  });
+
+  test('should ensure that the mempool-config.json Docker template has all the keys', () => {
+    jest.isolateModules(() => {
+      const fixture = JSON.parse(fs.readFileSync(`${__dirname}/../__fixtures__/mempool-config.template.json`, 'utf8'));
+      const dockerJson = fs.readFileSync(`${__dirname}/../../../docker/backend/mempool-config.json`, 'utf-8');
+
+      function parseJson(jsonObj, root?) {
+        for (const [key, value] of Object.entries(jsonObj)) {
+          switch (typeof value) {
+            case 'object': {
+              if (Array.isArray(value)) {
+                // numbers, arrays and booleans won't be enclosed by quotes
+                const replaceStr = `${root ? '__' + root + '_' : '__'}${key}__`;
+                expect(dockerJson).toContain(`"${key}": ${replaceStr}`);
+                break;
+              } else {
+                //Check for top level config keys
+                expect(dockerJson).toContain(`"${key}"`);
+                parseJson(value, key);
+                break;
+              }
+            }
+            case 'string': {
+              // strings should be enclosed by quotes
+              const replaceStr = `${root ? '__' + root + '_' : '__'}${key}__`;
+              expect(dockerJson).toContain(`"${key}": "${replaceStr}"`);
+              break;
+            }
+            default: {
+              // numbers, arrays and booleans won't be enclosed by quotes
+              const replaceStr = `${root ? '__' + root + '_' : '__'}${key}__`;
+              expect(dockerJson).toContain(`"${key}": ${replaceStr}`);
+              break;
+            }
+          }
+        };
+      }
+      parseJson(fixture);
+    });
+  });
+
+
 });

backend/src/__tests__/gbt/gbt-tests.ts

@@ -0,0 +1,68 @@
+import fs from 'fs';
+import { GbtGenerator, ThreadTransaction } from '../../../rust-gbt';
+import path from 'path';
+
+const baseline = require('./test-data/target-template.json');
+const testVector = require('./test-data/test-data-ids.json');
+const vectorUidMap: Map<number, string> = new Map(testVector.map(x => [x[0], x[1]]));
+const vectorTxidMap: Map<string, number>  = new Map(testVector.map(x => [x[1], x[0]]));
+// Note that this test buffer is specially constructed
+// such that uids are assigned in numerical txid order
+// so that ties break the same way as in Core's implementation
+const vectorBuffer: Buffer = fs.readFileSync(path.join(__dirname, './', './test-data/test-buffer.bin'));
+
+describe('Rust GBT', () => {
+  test('should produce the same template as getBlockTemplate from Bitcoin Core', async () => {
+    const rustGbt = new GbtGenerator();
+    const { mempool, maxUid } = mempoolFromArrayBuffer(vectorBuffer.buffer);
+    const result = await rustGbt.make(mempool, maxUid);
+
+    const blocks: [string, number][][] = result.blocks.map(block => {
+      return block.map(uid => [vectorUidMap.get(uid) || 'missing', uid]);
+    });
+    const template = baseline.map(tx => [tx.txid, vectorTxidMap.get(tx.txid)]);
+
+    expect(blocks[0].length).toEqual(baseline.length);
+    expect(blocks[0]).toEqual(template);
+  });
+});
+
+function mempoolFromArrayBuffer(buf: ArrayBuffer): { mempool: ThreadTransaction[], maxUid: number } {
+  let maxUid = 0;
+  const view = new DataView(buf);
+  const count = view.getUint32(0, false);
+  const txs: ThreadTransaction[] = [];
+  let offset = 4;
+  for (let i = 0; i < count; i++) {
+    const uid = view.getUint32(offset, false);
+    maxUid = Math.max(maxUid, uid);
+    const tx: ThreadTransaction = {
+      uid,
+      order: txidToOrdering(vectorUidMap.get(uid) as string),
+      fee: view.getFloat64(offset + 4, false),
+      weight: view.getUint32(offset + 12, false),
+      sigops: view.getUint32(offset + 16, false),
+      // feePerVsize: view.getFloat64(offset + 20, false),
+      effectiveFeePerVsize: view.getFloat64(offset + 28, false),
+      inputs: [],
+    };
+    const numInputs = view.getUint32(offset + 36, false);
+    offset += 40;
+    for (let j = 0; j < numInputs; j++) {
+      tx.inputs.push(view.getUint32(offset, false));
+      offset += 4;
+    }
+    txs.push(tx);
+  }
+  return { mempool: txs, maxUid };
+}
+
+function txidToOrdering(txid: string): number {
+  return parseInt(
+    txid.substr(62, 2) +
+      txid.substr(60, 2) +
+      txid.substr(58, 2) +
+      txid.substr(56, 2),
+    16
+  );
+}

backend/src/api/audit.ts

@@ -1,26 +1,26 @@
 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';
+import logger from '../logger';
+import { MempoolTransactionExtended, MempoolBlockWithTransactions } from '../mempool.interfaces';
+import rbfCache from './rbf-cache';
 
 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 } {
+  auditBlock(transactions: MempoolTransactionExtended[], projectedBlocks: MempoolBlockWithTransactions[], mempool: { [txId: string]: MempoolTransactionExtended })
+   : { censored: string[], added: string[], fresh: string[], sigop: string[], fullrbf: string[], score: number, similarity: number } {
     if (!projectedBlocks?.[0]?.transactionIds || !mempool) {
-      return { censored: [], added: [], fresh: [], score: 0 };
+      return { censored: [], added: [], fresh: [], sigop: [], fullrbf: [], score: 0, similarity: 1 };
     }
 
     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 fresh: string[] = []; // missing, but firstSeen or lastBoosted within PROPAGATION_MARGIN
+    const fullrbf: string[] = []; // either missing or present, and part of a fullrbf replacement
     const isCensored = {}; // missing, without excuse
     const isDisplaced = {};
     let displacedWeight = 0;
+    let matchedWeight = 0;
+    let projectedWeight = 0;
 
     const inBlock = {};
     const inTemplate = {};
@@ -36,18 +36,30 @@ class Audit {
     // 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) {
+        if (rbfCache.isFullRbf(txid)) {
+          fullrbf.push(txid);
+        } else if (mempool[txid]?.firstSeen != null && (now - (mempool[txid]?.firstSeen || 0)) <= PROPAGATION_MARGIN) {
+          // tx is recent, may have reached the miner too late for inclusion
+          fresh.push(txid);
+        } else if (mempool[txid]?.lastBoosted != null && (now - (mempool[txid]?.lastBoosted || 0)) <= PROPAGATION_MARGIN) {
+          // tx was recently cpfp'd, miner may not have the latest effective rate
           fresh.push(txid);
         } else {
           isCensored[txid] = true;
         }
-        displacedWeight += mempool[txid].weight;
+        displacedWeight += mempool[txid]?.weight || 0;
+      } else {
+        matchedWeight += mempool[txid]?.weight || 0;
       }
+      projectedWeight += mempool[txid]?.weight || 0;
       inTemplate[txid] = true;
     }
 
-    displacedWeight += (4000 - transactions[0].weight);
+    if (transactions[0]) {
+      displacedWeight += (4000 - transactions[0].weight);
+      projectedWeight += transactions[0].weight;
+      matchedWeight += 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
@@ -57,19 +69,24 @@ class Audit {
     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);
+      const tx = mempool[txid];
+      if (tx) {
+        const fits = (tx.weight - displacedWeightRemaining) < 4000;
+        const feeMatches = tx.effectiveFeePerVsize >= lastFeeRate;
+        if (fits || feeMatches) {
+          isDisplaced[txid] = true;
+          if (fits) {
+            lastFeeRate = Math.min(lastFeeRate, tx.effectiveFeePerVsize);
+          }
+          if (tx.firstSeen == null || (now - (tx?.firstSeen || 0)) > PROPAGATION_MARGIN) {
+            displacedWeightRemaining -= tx.weight;
+          }
+          failures = 0;
+        } else {
+          failures++;
         }
-        if (mempool[txid].firstSeen == null || (now - (mempool[txid]?.firstSeen || 0)) > PROPAGATION_MARGIN) {
-          displacedWeightRemaining -= mempool[txid].weight;
-        }
-        failures = 0;
       } else {
-        failures++;
+        logger.warn('projected transaction missing from mempool cache');
       }
       index++;
     }
@@ -81,19 +98,11 @@ class Audit {
       if (inTemplate[tx.txid]) {
         matches.push(tx.txid);
       } else {
-        if (!isDisplaced[tx.txid]) {
+        if (rbfCache.isFullRbf(tx.txid)) {
+          fullrbf.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;
@@ -106,31 +115,41 @@ class Audit {
     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];
+      const tx = mempool[txid];
+      if (tx) {
+        if (overflowWeightRemaining > 0) {
+          if (isCensored[txid]) {
+            delete isCensored[txid];
+          }
+          if (tx.effectiveFeePerVsize > maxOverflowRate) {
+            maxOverflowRate = tx.effectiveFeePerVsize;
+            rateThreshold = (Math.ceil(maxOverflowRate * 100) / 100) + 0.005;
+          }
+        } else if (tx.effectiveFeePerVsize <= rateThreshold) { // tolerance of 0.01 sat/vb + rounding
+          if (isCensored[txid]) {
+            delete isCensored[txid];
+          }
         }
+        overflowWeightRemaining -= (mempool[txid]?.weight || 0);
+      } else {
+        logger.warn('projected transaction missing from mempool cache');
       }
-      overflowWeightRemaining -= (mempool[txid]?.weight || 0);
       index--;
     }
 
     const numCensored = Object.keys(isCensored).length;
-    const score = matches.length > 0 ? (matches.length / (matches.length + numCensored)) : 0;
+    const numMatches = matches.length - 1; // adjust for coinbase tx
+    const score = numMatches > 0 ? (numMatches / (numMatches + numCensored)) : 0;
+    const similarity = projectedWeight ? matchedWeight / projectedWeight : 1;
 
     return {
       censored: Object.keys(isCensored),
       added,
       fresh,
-      score
+      sigop: [],
+      fullrbf,
+      score,
+      similarity,
     };
   }
 }

backend/src/api/backend-info.ts

@@ -2,6 +2,7 @@ import fs from 'fs';
 import path from 'path';
 import os from 'os';
 import { IBackendInfo } from '../mempool.interfaces';
+import config from '../config';
 
 class BackendInfo {
   private backendInfo: IBackendInfo;
@@ -22,7 +23,8 @@ class BackendInfo {
     this.backendInfo = {
       hostname: os.hostname(),
       version: versionInfo.version,
-      gitCommit: versionInfo.gitCommit
+      gitCommit: versionInfo.gitCommit,
+      lightning: config.LIGHTNING.ENABLED
     };
   }
 

backend/src/api/bisq/bisq.ts

@@ -7,7 +7,6 @@ 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';
 
@@ -31,10 +30,6 @@ class Bisq {
   private priceUpdateCallbackFunction: ((price: number) => void) | undefined;
   private topDirectoryWatcher: fs.FSWatcher | undefined;
   private subdirectoryWatcher: fs.FSWatcher | undefined;
-  private jsonParsePool = new StaticPool({
-    size: 4,
-    task: (blob: string) => JSON.parse(blob),
-  });
 
   constructor() {}
 

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

@@ -14,6 +14,8 @@ export interface AbstractBitcoinApi {
   $getAddress(address: string): Promise<IEsploraApi.Address>;
   $getAddressTransactions(address: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]>;
   $getAddressPrefix(prefix: string): string[];
+  $getScriptHash(scripthash: string): Promise<IEsploraApi.ScriptHash>;
+  $getScriptHashTransactions(address: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]>;
   $sendRawTransaction(rawTransaction: string): Promise<string>;
   $getOutspend(txId: string, vout: number): Promise<IEsploraApi.Outspend>;
   $getOutspends(txId: string): Promise<IEsploraApi.Outspend[]>;

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

@@ -17,4 +17,6 @@ function bitcoinApiFactory(): AbstractBitcoinApi {
   }
 }
 
+export const bitcoinCoreApi = new BitcoinApi(bitcoinClient);
+
 export default bitcoinApiFactory();

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

@@ -172,4 +172,35 @@ export namespace IBitcoinApi {
     }
   }
 
+  export interface BlockStats {
+    "avgfee": number;
+    "avgfeerate": number;
+    "avgtxsize": number;
+    "blockhash": string;
+    "feerate_percentiles": [number, number, number, number, number];
+    "height": number;
+    "ins": number;
+    "maxfee": number;
+    "maxfeerate": number;
+    "maxtxsize": number;
+    "medianfee": number;
+    "mediantime": number;
+    "mediantxsize": number;
+    "minfee": number;
+    "minfeerate": number;
+    "mintxsize": number;
+    "outs": number;
+    "subsidy": number;
+    "swtotal_size": number;
+    "swtotal_weight": number;
+    "swtxs": number;
+    "time": number;
+    "total_out": number;
+    "total_size": number;
+    "total_weight": number;
+    "totalfee": number;
+    "txs": number;
+    "utxo_increase": number;
+    "utxo_size_inc": number;
+  }
 }

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

@@ -28,6 +28,8 @@ class BitcoinApi implements AbstractBitcoinApi {
       size: block.size,
       weight: block.weight,
       previousblockhash: block.previousblockhash,
+      mediantime: block.mediantime,
+      stale: block.confirmations === -1,
     };
   }
 
@@ -63,17 +65,11 @@ class BitcoinApi implements AbstractBitcoinApi {
   }
 
   $getBlockHeightTip(): Promise<number> {
-    return this.bitcoindClient.getChainTips()
-      .then((result: IBitcoinApi.ChainTips[]) => {
-        return result.find(tip => tip.status === 'active')!.height;
-      });
+    return this.bitcoindClient.getBlockCount();
   }
 
   $getBlockHashTip(): Promise<string> {
-    return this.bitcoindClient.getChainTips()
-      .then((result: IBitcoinApi.ChainTips[]) => {
-        return result.find(tip => tip.status === 'active')!.hash;
-      });
+    return this.bitcoindClient.getBestBlockHash();
   }
 
   $getTxIdsForBlock(hash: string): Promise<string[]> {
@@ -112,6 +108,14 @@ class BitcoinApi implements AbstractBitcoinApi {
     throw new Error('Method getAddressTransactions not supported by the Bitcoin RPC API.');
   }
 
+  $getScriptHash(scripthash: string): Promise<IEsploraApi.ScriptHash> {
+    throw new Error('Method getScriptHash not supported by the Bitcoin RPC API.');
+  }
+
+  $getScriptHashTransactions(scripthash: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]> {
+    throw new Error('Method getScriptHashTransactions not supported by the Bitcoin RPC API.');
+  }
+
   $getRawMempool(): Promise<IEsploraApi.Transaction['txid'][]> {
     return this.bitcoindClient.getRawMemPool();
   }
@@ -414,12 +418,38 @@ class BitcoinApi implements AbstractBitcoinApi {
       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(witnessScript);
+    if (vin.prevout.scriptpubkey_type === 'v1_p2tr' && vin.witness) {
+      const witnessScript = this.witnessToP2TRScript(vin.witness);
+      if (witnessScript !== null) {
+        vin.inner_witnessscript_asm = this.convertScriptSigAsm(witnessScript);
+      }
     }
   }
 
+  /**
+   * This function must only be called when we know the witness we are parsing
+   * is a taproot witness.
+   * @param witness An array of hex strings that represents the witness stack of
+   *                the input.
+   * @returns null if the witness is not a script spend, and the hex string of
+   *          the script item if it is a script spend.
+   */
+  private witnessToP2TRScript(witness: string[]): string | null {
+    if (witness.length < 2) return null;
+    // Note: see BIP341 for parsing details of witness stack
+
+    // If there are at least two witness elements, and the first byte of the
+    // last element is 0x50, this last element is called annex a and
+    // is removed from the witness stack.
+    const hasAnnex = witness[witness.length - 1].substring(0, 2) === '50';
+    // If there are at least two witness elements left, script path spending is used.
+    // Call the second-to-last stack element s, the script.
+    // (Note: this phrasing from BIP341 assumes we've *removed* the annex from the stack)
+    if (hasAnnex && witness.length < 3) return null;
+    const positionOfScript = hasAnnex ? witness.length - 3 : witness.length - 2;
+    return witness[positionOfScript];
+  }
+
 }
 
 export default BitcoinApi;

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

@@ -7,7 +7,7 @@ const nodeRpcCredentials: BitcoinRpcCredentials = {
   port: config.CORE_RPC.PORT,
   user: config.CORE_RPC.USERNAME,
   pass: config.CORE_RPC.PASSWORD,
-  timeout: 60000,
+  timeout: config.CORE_RPC.TIMEOUT,
 };
 
 export default new bitcoin.Client(nodeRpcCredentials);

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

@@ -7,7 +7,7 @@ const nodeRpcCredentials: BitcoinRpcCredentials = {
   port: config.SECOND_CORE_RPC.PORT,
   user: config.SECOND_CORE_RPC.USERNAME,
   pass: config.SECOND_CORE_RPC.PASSWORD,
-  timeout: 60000,
+  timeout: config.SECOND_CORE_RPC.TIMEOUT,
 };
 
 export default new bitcoin.Client(nodeRpcCredentials);

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

@@ -6,7 +6,7 @@ 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 bitcoinApi, { bitcoinCoreApi } from './bitcoin-api-factory';
 import { Common } from '../common';
 import backendInfo from '../backend-info';
 import transactionUtils from '../transaction-utils';
@@ -18,6 +18,7 @@ import blocks from '../blocks';
 import bitcoinClient from './bitcoin-client';
 import difficultyAdjustment from '../difficulty-adjustment';
 import transactionRepository from '../../repositories/TransactionRepository';
+import rbfCache from '../rbf-cache';
 
 class BitcoinRoutes {
   public initRoutes(app: Application) {
@@ -31,6 +32,10 @@ class BitcoinRoutes {
       .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)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/rbf', this.getRbfHistory)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/cached', this.getCachedTx)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'replacements', this.getRbfReplacements)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'fullrbf/replacements', this.getFullRbfReplacements)
       .post(config.MEMPOOL.API_URL_PREFIX + 'tx/push', this.$postTransactionForm)
       .get(config.MEMPOOL.API_URL_PREFIX + 'donations', async (req, res) => {
         try {
@@ -91,7 +96,10 @@ class BitcoinRoutes {
       .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)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/height', this.getBlockTipHeight)
       .post(config.MEMPOOL.API_URL_PREFIX + 'psbt/addparents', this.postPsbtCompletion)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'blocks-bulk/:from', this.getBlocksByBulk.bind(this))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'blocks-bulk/:from/:to', this.getBlocksByBulk.bind(this))
       ;
 
       if (config.MEMPOOL.BACKEND !== 'esplora') {
@@ -105,7 +113,6 @@ class BitcoinRoutes {
           .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)
@@ -114,7 +121,8 @@ class BitcoinRoutes {
           .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 + 'scripthash/:scripthash', this.getScriptHash)
+          .get(config.MEMPOOL.API_URL_PREFIX + 'scripthash/:scripthash/txs', this.getScriptHashTransactions)
           .get(config.MEMPOOL.API_URL_PREFIX + 'address-prefix/:prefix', this.getAddressPrefix)
           ;
       }
@@ -123,8 +131,9 @@ class BitcoinRoutes {
 
   private getInitData(req: Request, res: Response) {
     try {
-      const result = websocketHandler.getInitData();
-      res.json(result);
+      const result = websocketHandler.getSerializedInitData();
+      res.set('Content-Type', 'application/json');
+      res.send(result);
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
@@ -203,6 +212,8 @@ class BitcoinRoutes {
           bestDescendant: tx.bestDescendant || null,
           descendants: tx.descendants || null,
           effectiveFeePerVsize: tx.effectiveFeePerVsize || null,
+          sigops: tx.sigops,
+          adjustedVsize: tx.adjustedVsize,
         });
         return;
       }
@@ -212,13 +223,25 @@ class BitcoinRoutes {
       res.json(cpfpInfo);
       return;
     } else {
-      const cpfpInfo = await transactionRepository.$getCpfpInfo(req.params.txId);
+      let cpfpInfo;
+      if (config.DATABASE.ENABLED) {
+        try {
+          cpfpInfo = await transactionRepository.$getCpfpInfo(req.params.txId);
+        } catch (e) {
+          res.status(500).send('failed to get CPFP info');
+          return;
+        }
+      }
       if (cpfpInfo) {
         res.json(cpfpInfo);
         return;
+      } else {
+        res.json({
+          ancestors: []
+        });
+        return;
       }
     }
-    res.status(404).send(`Transaction has no CPFP info available.`);
   }
 
   private getBackendInfo(req: Request, res: Response) {
@@ -377,9 +400,13 @@ class BitcoinRoutes {
 
   private async getBlockAuditSummary(req: Request, res: Response) {
     try {
-      const transactions = await blocks.$getBlockAuditSummary(req.params.hash);
-      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
-      res.json(transactions);
+      const auditSummary = await blocks.$getBlockAuditSummary(req.params.hash);
+      if (auditSummary) {
+        res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
+        res.json(auditSummary);
+      } else {
+        return res.status(404).send(`audit not available`);
+      }
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
@@ -387,7 +414,7 @@ class BitcoinRoutes {
 
   private async getBlocks(req: Request, res: Response) {
     try {
-      if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) { // Bitcoin
+      if (['mainnet', 'testnet', 'signet', 'regtest'].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));
@@ -399,10 +426,46 @@ class BitcoinRoutes {
     }
   }
 
+  private async getBlocksByBulk(req: Request, res: Response) {
+    try {
+      if (['mainnet', 'testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK) === false) { // Liquid, Bisq - Not implemented
+        return res.status(404).send(`This API is only available for Bitcoin networks`);
+      }
+      if (config.MEMPOOL.MAX_BLOCKS_BULK_QUERY <= 0) {
+        return res.status(404).send(`This API is disabled. Set config.MEMPOOL.MAX_BLOCKS_BULK_QUERY to a positive number to enable it.`);
+      }
+      if (!Common.indexingEnabled()) {
+        return res.status(404).send(`Indexing is required for this API`);
+      }
+
+      const from = parseInt(req.params.from, 10);
+      if (!req.params.from || from < 0) {
+        return res.status(400).send(`Parameter 'from' must be a block height (integer)`);
+      }
+      const to = req.params.to === undefined ? await bitcoinApi.$getBlockHeightTip() : parseInt(req.params.to, 10);
+      if (to < 0) {
+        return res.status(400).send(`Parameter 'to' must be a block height (integer)`);
+      }
+      if (from > to) {
+        return res.status(400).send(`Parameter 'to' must be a higher block height than 'from'`);
+      }
+      if ((to - from + 1) > config.MEMPOOL.MAX_BLOCKS_BULK_QUERY) {
+        return res.status(400).send(`You can only query ${config.MEMPOOL.MAX_BLOCKS_BULK_QUERY} blocks at once.`);
+      }
+
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
+      res.json(await blocks.$getBlocksBetweenHeight(from, to));
+
+    } 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();
+      const tip = blocks.getCurrentBlockHeight();
+      const fromHeight = Math.min(parseInt(req.params.height, 10) || tip, tip);
 
       // Check if block height exist in local cache to skip the hash lookup
       const blockByHeight = blocks.getBlocks().find((b) => b.height === fromHeight);
@@ -420,7 +483,7 @@ class BitcoinRoutes {
           returnBlocks.push(localBlock);
           nextHash = localBlock.previousblockhash;
         } else {
-          const block = await bitcoinApi.$getBlock(nextHash);
+          const block = await bitcoinCoreApi.$getBlock(nextHash);
           returnBlocks.push(block);
           nextHash = block.previousblockhash;
         }
@@ -484,15 +547,37 @@ class BitcoinRoutes {
     }
   }
 
-  private async getAddressTransactions(req: Request, res: Response) {
+  private async getAddressTransactions(req: Request, res: Response): Promise<void> {
     if (config.MEMPOOL.BACKEND === 'none') {
       res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
       return;
     }
 
     try {
-      const transactions = await bitcoinApi.$getAddressTransactions(req.params.address, req.params.txId);
+      let lastTxId: string = '';
+      if (req.query.after_txid && typeof req.query.after_txid === 'string') {
+        lastTxId = req.query.after_txid;
+      }
+      const transactions = await bitcoinApi.$getAddressTransactions(req.params.address, lastTxId);
       res.json(transactions);
+    } catch (e) {
+      if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
+        res.status(413).send(e instanceof Error ? e.message : e);
+        return;
+      }
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getScriptHash(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.$getScriptHash(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);
@@ -501,8 +586,26 @@ class BitcoinRoutes {
     }
   }
 
-  private async getAdressTxChain(req: Request, res: Response) {
-    res.status(501).send('Not implemented');
+  private async getScriptHashTransactions(req: Request, res: Response): Promise<void> {
+    if (config.MEMPOOL.BACKEND === 'none') {
+      res.status(405).send('Address lookups cannot be used with bitcoind as backend.');
+      return;
+    }
+
+    try {
+      let lastTxId: string = '';
+      if (req.query.after_txid && typeof req.query.after_txid === 'string') {
+        lastTxId = req.query.after_txid;
+      }
+      const transactions = await bitcoinApi.$getScriptHashTransactions(req.params.address, lastTxId);
+      res.json(transactions);
+    } catch (e) {
+      if (e instanceof Error && e.message && (e.message.indexOf('too long') > 0 || e.message.indexOf('confirmed status') > 0)) {
+        res.status(413).send(e instanceof Error ? e.message : e);
+        return;
+      }
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
   }
 
   private async getAddressPrefix(req: Request, res: Response) {
@@ -541,10 +644,14 @@ class BitcoinRoutes {
     }
   }
 
-  private async getBlockTipHeight(req: Request, res: Response) {
+  private getBlockTipHeight(req: Request, res: Response) {
     try {
-      const result = await bitcoinApi.$getBlockHeightTip();
-      res.json(result);
+      const result = blocks.getCurrentBlockHeight();
+      if (!result) {
+        return res.status(503).send(`Service Temporarily Unavailable`);
+      }
+      res.setHeader('content-type', 'text/plain');
+      res.send(result.toString());
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
@@ -588,6 +695,50 @@ class BitcoinRoutes {
     }
   }
 
+  private async getRbfHistory(req: Request, res: Response) {
+    try {
+      const replacements = rbfCache.getRbfTree(req.params.txId) || null;
+      const replaces = rbfCache.getReplaces(req.params.txId) || null;
+      res.json({
+        replacements,
+        replaces
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getRbfReplacements(req: Request, res: Response) {
+    try {
+      const result = rbfCache.getRbfTrees(false);
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getFullRbfReplacements(req: Request, res: Response) {
+    try {
+      const result = rbfCache.getRbfTrees(true);
+      res.json(result);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
+  private async getCachedTx(req: Request, res: Response) {
+    try {
+      const result = rbfCache.getTx(req.params.txId);
+      if (result) {
+        res.json(result);
+      } else {
+        res.status(204).send();
+      }
+    } 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);
@@ -613,12 +764,7 @@ class BitcoinRoutes {
   private async $postTransaction(req: Request, res: Response) {
     res.setHeader('content-type', 'text/plain');
     try {
-      let rawTx;
-      if (typeof req.body === 'object') {
-        rawTx = Object.keys(req.body)[0];
-      } else {
-        rawTx = req.body;
-      }
+      const rawTx = Common.getTransactionFromRequest(req, false);
       const txIdResult = await bitcoinApi.$sendRawTransaction(rawTx);
       res.send(txIdResult);
     } catch (e: any) {
@@ -629,12 +775,8 @@ class BitcoinRoutes {
 
   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 txHex = Common.getTransactionFromRequest(req, true);
       const txIdResult = await bitcoinClient.sendRawTransaction(txHex);
       res.send(txIdResult);
     } catch (e: any) {

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

@@ -16,7 +16,7 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
     super(bitcoinClient);
 
     const electrumConfig = { client: 'mempool-v2', version: '1.4' };
-    const electrumPersistencePolicy = { retryPeriod: 10000, maxRetry: 1000, callback: null };
+    const electrumPersistencePolicy = { retryPeriod: 1000, maxRetry: Number.MAX_SAFE_INTEGER, callback: null };
 
     const electrumCallbacks = {
       onConnect: (client, versionInfo) => { logger.info(`Connected to Electrum Server at ${config.ELECTRUM.HOST}:${config.ELECTRUM.PORT} (${JSON.stringify(versionInfo)})`); },
@@ -126,6 +126,77 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
     }
   }
 
+  async $getScriptHash(scripthash: string): Promise<IEsploraApi.ScriptHash> {
+    try {
+      const balance = await this.electrumClient.blockchainScripthash_getBalance(scripthash);
+      let history = memoryCache.get<IElectrumApi.ScriptHashHistory[]>('Scripthash_getHistory', scripthash);
+      if (!history) {
+        history = await this.electrumClient.blockchainScripthash_getHistory(scripthash);
+        memoryCache.set('Scripthash_getHistory', scripthash, history, 2);
+      }
+
+      const unconfirmed = history ? history.filter((h) => h.fee).length : 0;
+
+      return {
+        'scripthash': scripthash,
+        'chain_stats': {
+          'funded_txo_count': 0,
+          'funded_txo_sum': balance.confirmed ? balance.confirmed : 0,
+          'spent_txo_count': 0,
+          'spent_txo_sum': balance.confirmed < 0 ? balance.confirmed : 0,
+          'tx_count': (history?.length || 0) - unconfirmed,
+        },
+        'mempool_stats': {
+          'funded_txo_count': 0,
+          'funded_txo_sum': balance.unconfirmed > 0 ? balance.unconfirmed : 0,
+          'spent_txo_count': 0,
+          'spent_txo_sum': balance.unconfirmed < 0 ? -balance.unconfirmed : 0,
+          'tx_count': unconfirmed,
+        },
+        'electrum': true,
+      };
+    } catch (e: any) {
+      throw new Error(typeof e === 'string' ? e : e && e.message || e);
+    }
+  }
+
+  async $getScriptHashTransactions(scripthash: string, lastSeenTxId?: string): Promise<IEsploraApi.Transaction[]> {
+    try {
+      loadingIndicators.setProgress('address-' + scripthash, 0);
+
+      const transactions: IEsploraApi.Transaction[] = [];
+      let history = memoryCache.get<IElectrumApi.ScriptHashHistory[]>('Scripthash_getHistory', scripthash);
+      if (!history) {
+        history = await this.electrumClient.blockchainScripthash_getHistory(scripthash);
+        memoryCache.set('Scripthash_getHistory', scripthash, history, 2);
+      }
+      if (!history) {
+        throw new Error('failed to get scripthash history');
+      }
+      history.sort((a, b) => (b.height || 9999999) - (a.height || 9999999));
+
+      let startingIndex = 0;
+      if (lastSeenTxId) {
+        const pos = history.findIndex((historicalTx) => historicalTx.tx_hash === lastSeenTxId);
+        if (pos) {
+          startingIndex = pos + 1;
+        }
+      }
+      const endIndex = Math.min(startingIndex + 10, history.length);
+
+      for (let i = startingIndex; i < endIndex; i++) {
+        const tx = await this.$getRawTransaction(history[i].tx_hash, false, true);
+        transactions.push(tx);
+        loadingIndicators.setProgress('address-' + scripthash, (i + 1) / endIndex * 100);
+      }
+
+      return transactions;
+    } catch (e: any) {
+      loadingIndicators.setProgress('address-' + scripthash, 100);
+      throw new Error(typeof e === 'string' ? e : e && e.message || e);
+    }
+  }
+
   private $getScriptHashBalance(scriptHash: string): Promise<IElectrumApi.ScriptHashBalance> {
     return this.electrumClient.blockchainScripthash_getBalance(this.encodeScriptHash(scriptHash));
   }

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

@@ -88,6 +88,8 @@ export namespace IEsploraApi {
     size: number;
     weight: number;
     previousblockhash: string;
+    mediantime: number;
+    stale: boolean;
   }
 
   export interface Address {
@@ -97,6 +99,13 @@ export namespace IEsploraApi {
     electrum?: boolean;
   }
 
+  export interface ScriptHash {
+    scripthash: string;
+    chain_stats: ChainStats;
+    mempool_stats: MempoolStats;
+    electrum?: boolean;
+  }
+
   export interface ChainStats {
     funded_txo_count: number;
     funded_txo_sum: number;

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

@@ -1,62 +1,104 @@
 import config from '../../config';
 import axios, { AxiosRequestConfig } from 'axios';
+import http from 'http';
 import { AbstractBitcoinApi } from './bitcoin-api-abstract-factory';
 import { IEsploraApi } from './esplora-api.interface';
+import logger from '../../logger';
+
+const axiosConnection = axios.create({
+  httpAgent: new http.Agent({ keepAlive: true, })
+});
 
 class ElectrsApi implements AbstractBitcoinApi {
-  axiosConfig: AxiosRequestConfig = {
+  private axiosConfigWithUnixSocket: AxiosRequestConfig = config.ESPLORA.UNIX_SOCKET_PATH ? {
+    socketPath: config.ESPLORA.UNIX_SOCKET_PATH,
+    timeout: 10000,
+  } : {
+    timeout: 10000,
+  };
+  private axiosConfigTcpSocketOnly: AxiosRequestConfig = {
     timeout: 10000,
   };
 
-  constructor() { }
+  unixSocketRetryTimeout;
+  activeAxiosConfig;
+
+  constructor() {
+    this.activeAxiosConfig = this.axiosConfigWithUnixSocket;
+  }
+
+  fallbackToTcpSocket() {
+    if (!this.unixSocketRetryTimeout) {
+      logger.err(`Unable to connect to esplora unix socket. Falling back to tcp socket. Retrying unix socket in ${config.ESPLORA.RETRY_UNIX_SOCKET_AFTER / 1000} seconds`);
+      // Retry the unix socket after a few seconds
+      this.unixSocketRetryTimeout = setTimeout(() => {
+        logger.info(`Retrying to use unix socket for esplora now (applied for the next query)`);
+        this.activeAxiosConfig = this.axiosConfigWithUnixSocket;
+        this.unixSocketRetryTimeout = undefined;
+      }, config.ESPLORA.RETRY_UNIX_SOCKET_AFTER);
+    }
+
+    // Use the TCP socket (reach a different esplora instance through nginx)
+    this.activeAxiosConfig = this.axiosConfigTcpSocketOnly;
+  }
+
+  $queryWrapper<T>(url, responseType = 'json'): Promise<T> {
+    return axiosConnection.get<T>(url, { ...this.activeAxiosConfig, responseType: responseType })
+      .then((response) => response.data)
+      .catch((e) => {
+        if (e?.code === 'ECONNREFUSED') {
+          this.fallbackToTcpSocket();
+          // Retry immediately
+          return axiosConnection.get<T>(url, this.activeAxiosConfig)
+            .then((response) => response.data)
+            .catch((e) => {
+              logger.warn(`Cannot query esplora through the unix socket nor the tcp socket. Exception ${e}`);
+              throw e;
+            });
+        } else {
+          throw e;
+        }
+      });
+  }
 
   $getRawMempool(): Promise<IEsploraApi.Transaction['txid'][]> {
-    return axios.get<IEsploraApi.Transaction['txid'][]>(config.ESPLORA.REST_API_URL + '/mempool/txids', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<IEsploraApi.Transaction['txid'][]>(config.ESPLORA.REST_API_URL + '/mempool/txids');
   }
 
   $getRawTransaction(txId: string): Promise<IEsploraApi.Transaction> {
-    return axios.get<IEsploraApi.Transaction>(config.ESPLORA.REST_API_URL + '/tx/' + txId, this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<IEsploraApi.Transaction>(config.ESPLORA.REST_API_URL + '/tx/' + txId);
   }
 
   $getTransactionHex(txId: string): Promise<string> {
-    return axios.get<string>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/hex', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<string>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/hex');
   }
 
   $getBlockHeightTip(): Promise<number> {
-    return axios.get<number>(config.ESPLORA.REST_API_URL + '/blocks/tip/height', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<number>(config.ESPLORA.REST_API_URL + '/blocks/tip/height');
   }
 
   $getBlockHashTip(): Promise<string> {
-    return axios.get<string>(config.ESPLORA.REST_API_URL + '/blocks/tip/hash', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<string>(config.ESPLORA.REST_API_URL + '/blocks/tip/hash');
   }
 
   $getTxIdsForBlock(hash: string): Promise<string[]> {
-    return axios.get<string[]>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/txids', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<string[]>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/txids');
   }
 
   $getBlockHash(height: number): Promise<string> {
-    return axios.get<string>(config.ESPLORA.REST_API_URL + '/block-height/' + height, this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<string>(config.ESPLORA.REST_API_URL + '/block-height/' + height);
   }
 
   $getBlockHeader(hash: string): Promise<string> {
-    return axios.get<string>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/header', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<string>(config.ESPLORA.REST_API_URL + '/block/' + hash + '/header');
   }
 
   $getBlock(hash: string): Promise<IEsploraApi.Block> {
-    return axios.get<IEsploraApi.Block>(config.ESPLORA.REST_API_URL + '/block/' + hash, this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<IEsploraApi.Block>(config.ESPLORA.REST_API_URL + '/block/' + hash);
   }
 
   $getRawBlock(hash: string): Promise<Buffer> {
-    return axios.get<string>(config.ESPLORA.REST_API_URL + '/block/' + hash + "/raw", { ...this.axiosConfig, responseType: 'arraybuffer' })
+    return this.$queryWrapper<any>(config.ESPLORA.REST_API_URL + '/block/' + hash + "/raw", 'arraybuffer')
       .then((response) => { return Buffer.from(response.data); });
   }
 
@@ -68,6 +110,14 @@ class ElectrsApi implements AbstractBitcoinApi {
     throw new Error('Method getAddressTransactions not implemented.');
   }
 
+  $getScriptHash(scripthash: string): Promise<IEsploraApi.ScriptHash> {
+    throw new Error('Method getScriptHash not implemented.');
+  }
+
+  $getScriptHashTransactions(scripthash: string, txId?: string): Promise<IEsploraApi.Transaction[]> {
+    throw new Error('Method getScriptHashTransactions not implemented.');
+  }
+
   $getAddressPrefix(prefix: string): string[] {
     throw new Error('Method not implemented.');
   }
@@ -77,13 +127,11 @@ class ElectrsApi implements AbstractBitcoinApi {
   }
 
   $getOutspend(txId: string, vout: number): Promise<IEsploraApi.Outspend> {
-    return axios.get<IEsploraApi.Outspend>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/outspend/' + vout, this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<IEsploraApi.Outspend>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/outspend/' + vout);
   }
 
   $getOutspends(txId: string): Promise<IEsploraApi.Outspend[]> {
-    return axios.get<IEsploraApi.Outspend[]>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/outspends', this.axiosConfig)
-      .then((response) => response.data);
+    return this.$queryWrapper<IEsploraApi.Outspend[]>(config.ESPLORA.REST_API_URL + '/tx/' + txId + '/outspends');
   }
 
   async $getBatchedOutspends(txId: string[]): Promise<IEsploraApi.Outspend[][]> {

backend/src/api/chain-tips.ts

@@ -0,0 +1,61 @@
+import logger from '../logger';
+import bitcoinClient from './bitcoin/bitcoin-client';
+
+export interface ChainTip {
+  height: number;
+  hash: string;
+  branchlen: number;
+  status: 'invalid' | 'active' | 'valid-fork' | 'valid-headers' | 'headers-only';
+};
+
+export interface OrphanedBlock {
+  height: number;
+  hash: string;
+  status: 'valid-fork' | 'valid-headers' | 'headers-only';
+}
+
+class ChainTips {
+  private chainTips: ChainTip[] = [];
+  private orphanedBlocks: OrphanedBlock[] = [];
+
+  public async updateOrphanedBlocks(): Promise<void> {
+    try {
+      this.chainTips = await bitcoinClient.getChainTips();
+      this.orphanedBlocks = [];
+
+      for (const chain of this.chainTips) {
+        if (chain.status === 'valid-fork' || chain.status === 'valid-headers') {
+          let block = await bitcoinClient.getBlock(chain.hash);
+          while (block && block.confirmations === -1) {
+            this.orphanedBlocks.push({
+              height: block.height,
+              hash: block.hash,
+              status: chain.status
+            });
+            block = await bitcoinClient.getBlock(block.previousblockhash);
+          }
+        }
+      }
+
+      logger.debug(`Updated orphaned blocks cache. Found ${this.orphanedBlocks.length} orphaned blocks`);
+    } catch (e) {
+      logger.err(`Cannot get fetch orphaned blocks. Reason: ${e instanceof Error ? e.message : e}`);
+    }
+  }
+
+  public getOrphanedBlocksAtHeight(height: number | undefined): OrphanedBlock[] {
+    if (height === undefined) {
+      return [];
+    }
+
+    const orphans: OrphanedBlock[] = [];
+    for (const block of this.orphanedBlocks) {
+      if (block.height === height) {
+        orphans.push(block);
+      }
+    }
+    return orphans;
+  }
+}
+
+export default new ChainTips();

backend/src/api/common.ts

@@ -1,4 +1,6 @@
-import { CpfpInfo, TransactionExtended, TransactionStripped } from '../mempool.interfaces';
+import * as bitcoinjs from 'bitcoinjs-lib';
+import { Request } from 'express';
+import { Ancestor, CpfpInfo, CpfpSummary, CpfpCluster, EffectiveFeeStats, MempoolBlockWithTransactions, TransactionExtended, MempoolTransactionExtended, TransactionStripped, WorkingEffectiveFeeStats } from '../mempool.interfaces';
 import config from '../config';
 import { NodeSocket } from '../repositories/NodesSocketsRepository';
 import { isIP } from 'net';
@@ -35,50 +37,88 @@ export class Common {
   }
 
   static getFeesInRange(transactions: TransactionExtended[], rangeLength: number) {
-    const arr = [transactions[transactions.length - 1].effectiveFeePerVsize];
+    const filtered: TransactionExtended[] = [];
+    let lastValidRate = Infinity;
+    // filter out anomalous fee rates to ensure monotonic range
+    for (const tx of transactions) {
+      if (tx.effectiveFeePerVsize <= lastValidRate) {
+        filtered.push(tx);
+        lastValidRate = tx.effectiveFeePerVsize;
+      }
+    }
+    const arr = [filtered[filtered.length - 1].effectiveFeePerVsize];
     const chunk = 1 / (rangeLength - 1);
     let itemsToAdd = rangeLength - 2;
 
     while (itemsToAdd > 0) {
-      arr.push(transactions[Math.floor(transactions.length * chunk * itemsToAdd)].effectiveFeePerVsize);
+      arr.push(filtered[Math.floor(filtered.length * chunk * itemsToAdd)].effectiveFeePerVsize);
       itemsToAdd--;
     }
 
-    arr.push(transactions[0].effectiveFeePerVsize);
+    arr.push(filtered[0].effectiveFeePerVsize);
     return arr;
   }
 
-  static findRbfTransactions(added: TransactionExtended[], deleted: TransactionExtended[]): { [txid: string]: TransactionExtended } {
-    const matches: { [txid: string]: TransactionExtended } = {};
-    deleted
-      // The replaced tx must have at least one input with nSequence < maxint-1 (That’s the opt-in)
-      .filter((tx) => tx.vin.some((vin) => vin.sequence < 0xfffffffe))
-      .forEach((deletedTx) => {
-        const foundMatches = added.find((addedTx) => {
+  static findRbfTransactions(added: MempoolTransactionExtended[], deleted: MempoolTransactionExtended[]): { [txid: string]: MempoolTransactionExtended[] } {
+    const matches: { [txid: string]: MempoolTransactionExtended[] } = {};
+    added
+      .forEach((addedTx) => {
+        const foundMatches = deleted.filter((deletedTx) => {
           // The new tx must, absolutely speaking, pay at least as much fee as the replaced tx.
           return addedTx.fee > deletedTx.fee
             // The new transaction must pay more fee per kB than the replaced tx.
-            && addedTx.feePerVsize > deletedTx.feePerVsize
+            && addedTx.adjustedFeePerVsize > deletedTx.adjustedFeePerVsize
             // Spends one or more of the same inputs
             && deletedTx.vin.some((deletedVin) =>
-              addedTx.vin.some((vin) => vin.txid === deletedVin.txid));
+              addedTx.vin.some((vin) => vin.txid === deletedVin.txid && vin.vout === deletedVin.vout));
             });
-        if (foundMatches) {
-          matches[deletedTx.txid] = foundMatches;
+        if (foundMatches?.length) {
+          matches[addedTx.txid] = foundMatches;
         }
       });
     return matches;
   }
 
+  static findMinedRbfTransactions(minedTransactions: TransactionExtended[], spendMap: Map<string, MempoolTransactionExtended>): { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }} {
+    const matches: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }} = {};
+    for (const tx of minedTransactions) {
+      const replaced: Set<MempoolTransactionExtended> = new Set();
+      for (let i = 0; i < tx.vin.length; i++) {
+        const vin = tx.vin[i];
+        const match = spendMap.get(`${vin.txid}:${vin.vout}`);
+        if (match && match.txid !== tx.txid) {
+          replaced.add(match);
+          // remove this tx from the spendMap
+          // prevents the same tx being replaced more than once
+          for (const replacedVin of match.vin) {
+            const key = `${replacedVin.txid}:${replacedVin.vout}`;
+            spendMap.delete(key);
+          }
+        }
+        const key = `${vin.txid}:${vin.vout}`;
+        spendMap.delete(key);
+      }
+      if (replaced.size) {
+        matches[tx.txid] = { replaced: Array.from(replaced), replacedBy: tx };
+      }
+    }
+    return matches;
+  }
+
   static stripTransaction(tx: TransactionExtended): TransactionStripped {
     return {
       txid: tx.txid,
       fee: tx.fee,
       vsize: tx.weight / 4,
       value: tx.vout.reduce((acc, vout) => acc + (vout.value ? vout.value : 0), 0),
+      rate: tx.effectiveFeePerVsize,
     };
   }
 
+  static stripTransactions(txs: TransactionExtended[]): TransactionStripped[] {
+    return txs.map(this.stripTransaction);
+  }
+
   static sleep$(ms: number): Promise<void> {
     return new Promise((resolve) => {
        setTimeout(() => {
@@ -94,18 +134,18 @@ export class Common {
     }
   }
 
-  static setRelativesAndGetCpfpInfo(tx: TransactionExtended, memPool: { [txid: string]: TransactionExtended }): CpfpInfo {
+  static setRelativesAndGetCpfpInfo(tx: MempoolTransactionExtended, memPool: { [txid: string]: MempoolTransactionExtended }): CpfpInfo {
     const parents = this.findAllParents(tx, memPool);
-    const lowerFeeParents = parents.filter((parent) => parent.feePerVsize < tx.effectiveFeePerVsize);
+    const lowerFeeParents = parents.filter((parent) => parent.adjustedFeePerVsize < tx.effectiveFeePerVsize);
 
-    let totalWeight = tx.weight + lowerFeeParents.reduce((prev, val) => prev + val.weight, 0);
+    let totalWeight = (tx.adjustedVsize * 4) + lowerFeeParents.reduce((prev, val) => prev + (val.adjustedVsize * 4), 0);
     let totalFees = tx.fee + lowerFeeParents.reduce((prev, val) => prev + val.fee, 0);
 
     tx.ancestors = parents
       .map((t) => {
         return {
           txid: t.txid,
-          weight: t.weight,
+          weight: (t.adjustedVsize * 4),
           fee: t.fee,
         };
       });
@@ -126,8 +166,8 @@ export class Common {
   }
 
 
-  private static findAllParents(tx: TransactionExtended, memPool: { [txid: string]: TransactionExtended }): TransactionExtended[] {
-    let parents: TransactionExtended[] = [];
+  private static findAllParents(tx: MempoolTransactionExtended, memPool: { [txid: string]: MempoolTransactionExtended }): MempoolTransactionExtended[] {
+    let parents: MempoolTransactionExtended[] = [];
     tx.vin.forEach((parent) => {
       if (parents.find((p) => p.txid === parent.txid)) {
         return;
@@ -135,17 +175,17 @@ export class Common {
 
       const parentTx = memPool[parent.txid];
       if (parentTx) {
-        if (tx.bestDescendant && tx.bestDescendant.fee / (tx.bestDescendant.weight / 4) > parentTx.feePerVsize) {
+        if (tx.bestDescendant && tx.bestDescendant.fee / (tx.bestDescendant.weight / 4) > parentTx.adjustedFeePerVsize) {
           if (parentTx.bestDescendant && parentTx.bestDescendant.fee < tx.fee + tx.bestDescendant.fee) {
             parentTx.bestDescendant = {
-              weight: tx.weight + tx.bestDescendant.weight,
+              weight: (tx.adjustedVsize * 4) + tx.bestDescendant.weight,
               fee: tx.fee + tx.bestDescendant.fee,
               txid: tx.txid,
             };
           }
-        } else if (tx.feePerVsize > parentTx.feePerVsize) {
+        } else if (tx.adjustedFeePerVsize > parentTx.adjustedFeePerVsize) {
           parentTx.bestDescendant = {
-            weight: tx.weight,
+            weight: (tx.adjustedVsize * 4),
             fee: tx.fee,
             txid: tx.txid
           };
@@ -157,6 +197,30 @@ export class Common {
     return parents;
   }
 
+  // calculates the ratio of matched transactions to projected transactions by weight
+  static getSimilarity(projectedBlock: MempoolBlockWithTransactions, transactions: TransactionExtended[]): number {
+    let matchedWeight = 0;
+    let projectedWeight = 0;
+    const inBlock = {};
+
+    for (const tx of transactions) {
+      inBlock[tx.txid] = tx;
+    }
+
+    // look for transactions that were expected in the template, but missing from the mined block
+    for (const tx of projectedBlock.transactions) {
+      if (inBlock[tx.txid]) {
+        matchedWeight += tx.vsize * 4;
+      }
+      projectedWeight += tx.vsize * 4;
+    }
+
+    projectedWeight += transactions[0].weight;
+    matchedWeight += transactions[0].weight;
+
+    return projectedWeight ? matchedWeight / projectedWeight : 1;
+  }
+
   static getSqlInterval(interval: string | null): string | null {
     switch (interval) {
       case '24h': return '1 DAY';
@@ -168,13 +232,14 @@ export class Common {
       case '1y': return '1 YEAR';
       case '2y': return '2 YEAR';
       case '3y': return '3 YEAR';
+      case '4y': return '4 YEAR';
       default: return null;
     }
   }
 
   static indexingEnabled(): boolean {
     return (
-      ['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) &&
+      ['mainnet', 'testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK) &&
       config.DATABASE.ENABLED === true &&
       config.MEMPOOL.INDEXING_BLOCKS_AMOUNT !== 0
     );
@@ -190,7 +255,7 @@ export class Common {
   static cpfpIndexingEnabled(): boolean {
     return (
       Common.indexingEnabled() &&
-      config.MEMPOOL.TRANSACTION_INDEXING === true
+      config.MEMPOOL.CPFP_INDEXING === true
     );
   }
 
@@ -230,14 +295,21 @@ export class Common {
     ].join('x');
   }
 
-  static utcDateToMysql(date?: number): string {
+  static utcDateToMysql(date?: number | null): string | null {
+    if (date === null) {
+      return null;
+    }
     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];
+    let url: string = addr;
+
+    if (config.LIGHTNING.BACKEND === 'cln') {
+      url = addr.split('://')[1];
+    }
 
     if (!url) {
       return {
@@ -254,7 +326,7 @@ export class Common {
       }
     } else if (addr.indexOf('i2p') !== -1) {
       network = 'i2p';
-    } else if (addr.indexOf('ipv4') !== -1) {
+    } else if (addr.indexOf('ipv4') !== -1 || (config.LIGHTNING.BACKEND === 'lnd' && isIP(url.split(':')[0]) === 4)) {
       const ipv = isIP(url.split(':')[0]);
       if (ipv === 4) {
         network = 'ipv4';
@@ -264,7 +336,7 @@ export class Common {
           url: addr,
         };
       }
-    } else if (addr.indexOf('ipv6') !== -1) {
+    } else if (addr.indexOf('ipv6') !== -1 || (config.LIGHTNING.BACKEND === 'lnd' && url.indexOf(']:'))) {
       url = url.split('[')[1].split(']')[0];
       const ipv = isIP(url);
       if (ipv === 6) {
@@ -306,4 +378,364 @@ export class Common {
       };
     }
   }
+
+  static calculateCpfp(height: number, transactions: TransactionExtended[]): CpfpSummary {
+    const clusters: CpfpCluster[] = []; // list of all cpfp clusters in this block
+    const clusterMap: { [txid: string]: CpfpCluster } = {}; // map transactions to their cpfp cluster
+    let clusterTxs: TransactionExtended[] = []; // working list of elements of the current cluster
+    let ancestors: { [txid: string]: boolean } = {}; // working set of ancestors of the current cluster root
+    const txMap = {};
+    // initialize the txMap
+    for (const tx of transactions) {
+      txMap[tx.txid] = tx;
+    }
+    // reverse pass to identify CPFP clusters
+    for (let i = transactions.length - 1; i >= 0; i--) {
+      const tx = transactions[i];
+      if (!ancestors[tx.txid]) {
+        let totalFee = 0;
+        let totalVSize = 0;
+        clusterTxs.forEach(tx => {
+          totalFee += tx?.fee || 0;
+          totalVSize += (tx.weight / 4);
+        });
+        const effectiveFeePerVsize = totalFee / totalVSize;
+        let cluster: CpfpCluster;
+        if (clusterTxs.length > 1) {
+          cluster = {
+            root: clusterTxs[0].txid,
+            height,
+            txs: clusterTxs.map(tx => { return { txid: tx.txid, weight: tx.weight, fee: tx.fee || 0 }; }),
+            effectiveFeePerVsize,
+          };
+          clusters.push(cluster);
+        }
+        clusterTxs.forEach(tx => {
+          txMap[tx.txid].effectiveFeePerVsize = effectiveFeePerVsize;
+          if (cluster) {
+            clusterMap[tx.txid] = cluster;
+          }
+        });
+        // reset working vars
+        clusterTxs = [];
+        ancestors = {};
+      }
+      clusterTxs.push(tx);
+      tx.vin.forEach(vin => {
+        ancestors[vin.txid] = true;
+      });
+    }
+    // forward pass to enforce ancestor rate caps
+    for (const tx of transactions) {
+      let minAncestorRate = tx.effectiveFeePerVsize;
+      for (const vin of tx.vin) {
+        if (txMap[vin.txid]?.effectiveFeePerVsize) {
+          minAncestorRate = Math.min(minAncestorRate, txMap[vin.txid].effectiveFeePerVsize);
+        }
+      }
+      // check rounded values to skip cases with almost identical fees
+      const roundedMinAncestorRate = Math.ceil(minAncestorRate);
+      const roundedEffectiveFeeRate = Math.floor(tx.effectiveFeePerVsize);
+      if (roundedMinAncestorRate < roundedEffectiveFeeRate) {
+        tx.effectiveFeePerVsize = minAncestorRate;
+        if (!clusterMap[tx.txid]) {
+          // add a single-tx cluster to record the dependent rate
+          const cluster = {
+            root: tx.txid,
+            height,
+            txs: [{ txid: tx.txid, weight: tx.weight, fee: tx.fee || 0 }],
+            effectiveFeePerVsize: minAncestorRate,
+          };
+          clusterMap[tx.txid] = cluster;
+          clusters.push(cluster);
+        } else {
+          // update the existing cluster with the dependent rate
+          clusterMap[tx.txid].effectiveFeePerVsize = minAncestorRate;
+        }
+      }
+    }
+    return {
+      transactions,
+      clusters,
+    };
+  }
+
+  static calcEffectiveFeeStatistics(transactions: { weight: number, fee: number, effectiveFeePerVsize?: number, txid: string }[]): EffectiveFeeStats {
+    const sortedTxs = transactions.map(tx => { return { txid: tx.txid, weight: tx.weight, rate: tx.effectiveFeePerVsize || ((tx.fee || 0) / (tx.weight / 4)) }; }).sort((a, b) => a.rate - b.rate);
+
+    let weightCount = 0;
+    let medianFee = 0;
+    let medianWeight = 0;
+
+    // calculate the "medianFee" as the average fee rate of the middle 10000 weight units of transactions
+    const leftBound = 1995000;
+    const rightBound = 2005000;
+    for (let i = 0; i < sortedTxs.length && weightCount < rightBound; i++) {
+      const left = weightCount;
+      const right = weightCount + sortedTxs[i].weight;
+      if (right > leftBound) {
+        const weight = Math.min(right, rightBound) - Math.max(left, leftBound);
+        medianFee += (sortedTxs[i].rate * (weight / 4) );
+        medianWeight += weight;
+      }
+      weightCount += sortedTxs[i].weight;
+    }
+    const medianFeeRate = medianWeight ? (medianFee / (medianWeight / 4)) : 0;
+
+    // minimum effective fee heuristic:
+    // lowest of
+    // a) the 1st percentile of effective fee rates
+    // b) the minimum effective fee rate in the last 2% of transactions (in block order)
+    const minFee = Math.min(
+      Common.getNthPercentile(1, sortedTxs).rate,
+      transactions.slice(-transactions.length / 50).reduce((min, tx) => { return Math.min(min, tx.effectiveFeePerVsize || ((tx.fee || 0) / (tx.weight / 4))); }, Infinity)
+    );
+
+    // maximum effective fee heuristic:
+    // highest of
+    // a) the 99th percentile of effective fee rates
+    // b) the maximum effective fee rate in the first 2% of transactions (in block order)
+    const maxFee = Math.max(
+      Common.getNthPercentile(99, sortedTxs).rate,
+      transactions.slice(0, transactions.length / 50).reduce((max, tx) => { return Math.max(max, tx.effectiveFeePerVsize || ((tx.fee || 0) / (tx.weight / 4))); }, 0)
+    );
+
+    return {
+      medianFee: medianFeeRate,
+      feeRange: [
+        minFee,
+        [10,25,50,75,90].map(n => Common.getNthPercentile(n, sortedTxs).rate),
+        maxFee,
+      ].flat(),
+    };
+  }
+
+  static getNthPercentile(n: number, sortedDistribution: any[]): any {
+    return sortedDistribution[Math.floor((sortedDistribution.length - 1) * (n / 100))];
+  }
+
+  static getTransactionFromRequest(req: Request, form: boolean): string {
+    let rawTx: any = typeof req.body === 'object' && form
+      ? Object.values(req.body)[0] as any
+      : req.body;
+    if (typeof rawTx !== 'string') {
+      throw Object.assign(new Error('Non-string request body'), { code: -1 });
+    }
+
+    // Support both upper and lower case hex
+    // Support both txHash= Form and direct API POST
+    const reg = form ? /^txHash=((?:[a-fA-F0-9]{2})+)$/ : /^((?:[a-fA-F0-9]{2})+)$/;
+    const matches = reg.exec(rawTx);
+    if (!matches || !matches[1]) {
+      throw Object.assign(new Error('Non-hex request body'), { code: -2 });
+    }
+
+    // Guaranteed to be a hex string of multiple of 2
+    // Guaranteed to be lower case
+    // Guaranteed to pass validation (see function below)
+    return this.validateTransactionHex(matches[1].toLowerCase());
+  }
+
+  private static validateTransactionHex(txhex: string): string {
+    // Do not mutate txhex
+
+    // We assume txhex to be valid hex (output of getTransactionFromRequest above)
+
+    // Check 1: Valid transaction parse
+    let tx: bitcoinjs.Transaction;
+    try {
+      tx = bitcoinjs.Transaction.fromHex(txhex);
+    } catch(e) {
+      throw Object.assign(new Error('Invalid transaction (could not parse)'), { code: -4 });
+    }
+
+    // Check 2: Simple size check
+    if (tx.weight() > config.MEMPOOL.MAX_PUSH_TX_SIZE_WEIGHT) {
+      throw Object.assign(new Error(`Transaction too large (max ${config.MEMPOOL.MAX_PUSH_TX_SIZE_WEIGHT} weight units)`), { code: -3 });
+    }
+
+    // Check 3: Check unreachable script in taproot (if not allowed)
+    if (!config.MEMPOOL.ALLOW_UNREACHABLE) {
+      tx.ins.forEach(input => {
+        const witness = input.witness;
+        // See BIP 341: Script validation rules
+        const hasAnnex = witness.length >= 2 &&
+          witness[witness.length - 1][0] === 0x50;
+        const scriptSpendMinLength = hasAnnex ? 3 : 2;
+        const maybeScriptSpend = witness.length >= scriptSpendMinLength;
+
+        if (maybeScriptSpend) {
+          const controlBlock = witness[witness.length - scriptSpendMinLength + 1];
+          if (controlBlock.length === 0 || !this.isValidLeafVersion(controlBlock[0])) {
+            // Skip this input, it's not taproot
+            return;
+          }
+          // Definitely taproot. Get script
+          const script = witness[witness.length - scriptSpendMinLength];
+          const decompiled = bitcoinjs.script.decompile(script);
+          if (!decompiled || decompiled.length < 2) {
+            // Skip this input
+            return;
+          }
+          // Iterate up to second last (will look ahead 1 item)
+          for (let i = 0; i < decompiled.length - 1; i++) {
+            const first = decompiled[i];
+            const second = decompiled[i + 1];
+            if (
+              first === bitcoinjs.opcodes.OP_FALSE &&
+              second === bitcoinjs.opcodes.OP_IF
+            ) {
+              throw Object.assign(new Error('Unreachable taproot scripts not allowed'), { code: -5 });
+            }
+          }
+        }
+      })
+    }
+
+    // Pass through the input string untouched
+    return txhex;
+  }
+
+  private static isValidLeafVersion(leafVersion: number): boolean {
+    // See Note 7 in BIP341
+    // https://github.com/bitcoin/bips/blob/66a1a8151021913047934ebab3f8883f2f8ca75b/bip-0341.mediawiki#cite_note-7
+    // "What constraints are there on the leaf version?"
+
+    // Must be an integer between 0 and 255
+    // Since we're parsing a byte
+    if (Math.floor(leafVersion) !== leafVersion || leafVersion < 0 || leafVersion > 255) {
+      return false;
+    }
+    // "the leaf version cannot be odd"
+    if ((leafVersion & 0x01) === 1) {
+      return false;
+    }
+    // "The values that comply to this rule are
+    // the 32 even values between 0xc0 and 0xfe
+    if (leafVersion >= 0xc0 && leafVersion <= 0xfe) {
+      return true;
+    }
+    // and also 0x66, 0x7e, 0x80, 0x84, 0x96, 0x98, 0xba, 0xbc, 0xbe."
+    if ([0x66, 0x7e, 0x80, 0x84, 0x96, 0x98, 0xba, 0xbc, 0xbe].includes(leafVersion)) {
+      return true;
+    }
+    // Otherwise, invalid
+    return false;
+  }
+}
+
+/**
+ * Class to calculate average fee rates of a list of transactions
+ * at certain weight percentiles, in a single pass
+ * 
+ * init with:
+ *   maxWeight - the total weight to measure percentiles relative to (e.g. 4MW for a single block)
+ *   percentileBandWidth - how many weight units to average over for each percentile (as a % of maxWeight)
+ *   percentiles - an array of weight percentiles to compute, in %
+ * 
+ * then call .processNext(tx) for each transaction, in descending order
+ * 
+ * retrieve the final results with .getFeeStats()
+ */
+export class OnlineFeeStatsCalculator {
+  private maxWeight: number;
+  private percentiles = [10,25,50,75,90];
+
+  private bandWidthPercent = 2;
+  private bandWidth: number = 0;
+  private bandIndex = 0;
+  private leftBound = 0;
+  private rightBound = 0;
+  private inBand = false;
+  private totalBandFee = 0;
+  private totalBandWeight = 0;
+  private minBandRate = Infinity;
+  private maxBandRate = 0;
+
+  private feeRange: { avg: number, min: number, max: number }[] = [];
+  private totalWeight: number = 0;
+
+  constructor (maxWeight: number, percentileBandWidth?: number, percentiles?: number[]) {
+    this.maxWeight = maxWeight;
+    if (percentiles && percentiles.length) {
+      this.percentiles = percentiles;
+    }
+    if (percentileBandWidth != null) {
+      this.bandWidthPercent = percentileBandWidth;
+    }
+    this.bandWidth = this.maxWeight * (this.bandWidthPercent / 100);
+    // add min/max percentiles aligned to the ends of the range
+    this.percentiles.unshift(this.bandWidthPercent / 2);
+    this.percentiles.push(100 - (this.bandWidthPercent / 2));
+    this.setNextBounds();
+  }
+
+  processNext(tx: { weight: number, fee: number, effectiveFeePerVsize?: number, feePerVsize?: number, rate?: number, txid: string }): void {
+    let left = this.totalWeight;
+    const right = this.totalWeight + tx.weight;
+    if (!this.inBand && right <= this.leftBound) {
+      this.totalWeight += tx.weight;
+      return;
+    }
+
+    while (left < right) {
+      if (right > this.leftBound) {
+        this.inBand = true;
+        const txRate = (tx.rate || tx.effectiveFeePerVsize || tx.feePerVsize || 0);
+        const weight = Math.min(right, this.rightBound) - Math.max(left, this.leftBound);
+        this.totalBandFee += (txRate * weight);
+        this.totalBandWeight += weight;
+        this.maxBandRate = Math.max(this.maxBandRate, txRate);
+        this.minBandRate = Math.min(this.minBandRate, txRate);
+      }
+      left = Math.min(right, this.rightBound);
+
+      if (left >= this.rightBound) {
+        this.inBand = false;
+        const avgBandFeeRate = this.totalBandWeight ? (this.totalBandFee / this.totalBandWeight) : 0;
+        this.feeRange.unshift({ avg: avgBandFeeRate, min: this.minBandRate, max: this.maxBandRate });
+        this.bandIndex++;
+        this.setNextBounds();
+        this.totalBandFee = 0;
+        this.totalBandWeight = 0;
+        this.minBandRate = Infinity;
+        this.maxBandRate = 0;
+      }
+    }
+    this.totalWeight += tx.weight;
+  }
+
+  private setNextBounds(): void {
+    const nextPercentile = this.percentiles[this.bandIndex];
+    if (nextPercentile != null) {
+      this.leftBound = ((nextPercentile / 100) * this.maxWeight) - (this.bandWidth / 2);
+      this.rightBound = this.leftBound + this.bandWidth;
+    } else {
+      this.leftBound = Infinity;
+      this.rightBound = Infinity;
+    }
+  }
+
+  getRawFeeStats(): WorkingEffectiveFeeStats {
+    if (this.totalBandWeight > 0) {
+      const avgBandFeeRate = this.totalBandWeight ? (this.totalBandFee / this.totalBandWeight) : 0;
+      this.feeRange.unshift({ avg: avgBandFeeRate, min: this.minBandRate, max: this.maxBandRate });
+    }
+    while (this.feeRange.length < this.percentiles.length) {
+      this.feeRange.unshift({ avg: 0, min: 0, max: 0 });
+    }
+    return {
+      minFee: this.feeRange[0].min,
+      medianFee: this.feeRange[Math.floor(this.feeRange.length / 2)].avg,
+      maxFee: this.feeRange[this.feeRange.length - 1].max,
+      feeRange: this.feeRange.map(f => f.avg),
+    };
+  }
+
+  getFeeStats(): EffectiveFeeStats {
+    const stats = this.getRawFeeStats();
+    stats.feeRange[0] = stats.minFee;
+    stats.feeRange[stats.feeRange.length - 1] = stats.maxFee;
+    return stats;
+  }
 }

backend/src/api/database-migration.ts

@@ -2,9 +2,12 @@ import config from '../config';
 import DB from '../database';
 import logger from '../logger';
 import { Common } from './common';
+import blocksRepository from '../repositories/BlocksRepository';
+import cpfpRepository from '../repositories/CpfpRepository';
+import { RowDataPacket } from 'mysql2';
 
 class DatabaseMigration {
-  private static currentVersion = 49;
+  private static currentVersion = 64;
   private queryTimeout = 3600_000;
   private statisticsAddedIndexed = false;
   private uniqueLogs: string[] = [];
@@ -59,8 +62,8 @@ class DatabaseMigration {
 
     if (databaseSchemaVersion <= 2) {
       // Disable some spam logs when they're not relevant
-      this.uniqueLogs.push(this.blocksTruncatedMessage);
-      this.uniqueLogs.push(this.hashratesTruncatedMessage);
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      this.uniqueLog(logger.notice, this.hashratesTruncatedMessage);
     }
 
     logger.debug('MIGRATIONS: Current state.schema_version ' + databaseSchemaVersion);
@@ -83,7 +86,7 @@ class DatabaseMigration {
       try {
         await this.$migrateTableSchemaFromVersion(databaseSchemaVersion);
         if (databaseSchemaVersion === 0) {
-          logger.notice(`MIGRATIONS: OK. Database schema has been properly initialized to version ${DatabaseMigration.currentVersion} (latest version)`);          
+          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)`);
         }
@@ -101,7 +104,7 @@ class DatabaseMigration {
   private async $createMissingTablesAndIndexes(databaseSchemaVersion: number) {
     await this.$setStatisticsAddedIndexedFlag(databaseSchemaVersion);
 
-    const isBitcoin = ['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK);
+    const isBitcoin = ['mainnet', 'testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK);
 
     await this.$executeQuery(this.getCreateElementsTableQuery(), await this.$checkIfTableExists('elements_pegs'));
     await this.$executeQuery(this.getCreateStatisticsQuery(), await this.$checkIfTableExists('statistics'));
@@ -297,7 +300,7 @@ class DatabaseMigration {
       await this.$executeQuery('ALTER TABLE `lightning_stats` ADD med_base_fee_mtokens bigint(20) unsigned NOT NULL DEFAULT "0"');
       await this.updateToSchemaVersion(27);
     }
-    
+
     if (databaseSchemaVersion < 28 && isBitcoin === true) {
       if (config.LIGHTNING.ENABLED) {
         this.uniqueLog(logger.notice, `'lightning_stats' and 'node_stats' tables have been truncated.`);
@@ -442,6 +445,109 @@ class DatabaseMigration {
       await this.$executeQuery('TRUNCATE TABLE `blocks_audits`');
       await this.updateToSchemaVersion(49);
     }
+
+    if (databaseSchemaVersion < 50) {
+      await this.$executeQuery('ALTER TABLE `blocks` DROP COLUMN `cpfp_indexed`');
+      await this.updateToSchemaVersion(50);
+    }
+
+    if (databaseSchemaVersion < 51) {
+      await this.$executeQuery('ALTER TABLE `cpfp_clusters` ADD INDEX `height` (`height`)');
+      await this.updateToSchemaVersion(51);
+    }
+
+    if (databaseSchemaVersion < 52) {
+      await this.$executeQuery(this.getCreateCompactCPFPTableQuery(), await this.$checkIfTableExists('compact_cpfp_clusters'));
+      await this.$executeQuery(this.getCreateCompactTransactionsTableQuery(), await this.$checkIfTableExists('compact_transactions'));
+      try {
+        await this.$convertCompactCpfpTables();
+        await this.$executeQuery('DROP TABLE IF EXISTS `transactions`');
+        await this.$executeQuery('DROP TABLE IF EXISTS `cpfp_clusters`');
+        await this.updateToSchemaVersion(52);
+      } catch (e) {
+        logger.warn('' + (e instanceof Error ? e.message : e));
+      }
+    }
+
+    if (databaseSchemaVersion < 53) {
+      await this.$executeQuery('ALTER TABLE statistics MODIFY mempool_byte_weight bigint(20) UNSIGNED NOT NULL');
+      await this.updateToSchemaVersion(53);
+    }
+
+    if (databaseSchemaVersion < 54) {
+      this.uniqueLog(logger.notice, `'prices' table has been truncated`);
+      await this.$executeQuery(`TRUNCATE prices`);
+      if (isBitcoin === true) {
+        this.uniqueLog(logger.notice, `'blocks_prices' table has been truncated`);
+        await this.$executeQuery(`TRUNCATE blocks_prices`);
+      }
+      await this.updateToSchemaVersion(54);
+    }
+
+    if (databaseSchemaVersion < 55) {
+      await this.$executeQuery(this.getAdditionalBlocksDataQuery());
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      await this.$executeQuery('TRUNCATE blocks;'); // Need to re-index
+      await this.updateToSchemaVersion(55);
+    }
+
+    if (databaseSchemaVersion < 56) {
+      await this.$executeQuery('ALTER TABLE pools ADD unique_id int NOT NULL DEFAULT -1');
+      await this.$executeQuery('TRUNCATE TABLE `blocks`');
+      this.uniqueLog(logger.notice, this.blocksTruncatedMessage);
+      await this.$executeQuery('DELETE FROM `pools`');
+      await this.$executeQuery('ALTER TABLE pools AUTO_INCREMENT = 1');
+      await this.$executeQuery(`UPDATE state SET string = NULL WHERE name = 'pools_json_sha'`);
+      this.uniqueLog(logger.notice, '`pools` table has been truncated`');
+      await this.updateToSchemaVersion(56);
+    }
+
+    if (databaseSchemaVersion < 57 && isBitcoin === true) {
+      await this.$executeQuery(`ALTER TABLE nodes MODIFY updated_at datetime NULL`);
+      await this.updateToSchemaVersion(57);
+    }
+
+    if (databaseSchemaVersion < 58) {
+      // We only run some migration queries for this version
+      await this.updateToSchemaVersion(58);
+    }
+
+    if (databaseSchemaVersion < 59 && ['testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK)) {
+      // https://github.com/mempool/mempool/issues/3360
+      await this.$executeQuery(`TRUNCATE prices`);
+    }
+
+    if (databaseSchemaVersion < 60 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD sigop_txs JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(60);
+    }
+
+    if (databaseSchemaVersion < 61 && isBitcoin === true) {
+      // Break block templates into their own table
+      if (! await this.$checkIfTableExists('blocks_templates')) {
+        await this.$executeQuery('CREATE TABLE blocks_templates AS SELECT id, template FROM blocks_summaries WHERE template != "[]"');
+      }
+      await this.$executeQuery('ALTER TABLE blocks_templates MODIFY template JSON DEFAULT "[]"');
+      await this.$executeQuery('ALTER TABLE blocks_templates ADD PRIMARY KEY (id)');
+      await this.$executeQuery('ALTER TABLE blocks_summaries DROP COLUMN template');
+      await this.updateToSchemaVersion(61);
+    }
+
+    if (databaseSchemaVersion < 62 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD expected_fees BIGINT UNSIGNED DEFAULT NULL');
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD expected_weight BIGINT UNSIGNED DEFAULT NULL');
+      await this.updateToSchemaVersion(62);
+    }
+
+    if (databaseSchemaVersion < 63 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `blocks_audits` ADD fullrbf_txs JSON DEFAULT "[]"');
+      await this.updateToSchemaVersion(63);
+    }
+
+    if (databaseSchemaVersion < 64 && isBitcoin === true) {
+      await this.$executeQuery('ALTER TABLE `nodes` ADD features text NULL');
+      await this.updateToSchemaVersion(64);
+    }
   }
 
   /**
@@ -550,7 +656,7 @@ class DatabaseMigration {
    */
   private getMigrationQueriesFromVersion(version: number): string[] {
     const queries: string[] = [];
-    const isBitcoin = ['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK);
+    const isBitcoin = ['mainnet', 'testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK);
 
     if (version < 1) {
       if (config.MEMPOOL.NETWORK !== 'liquid' && config.MEMPOOL.NETWORK !== 'liquidtestnet') {
@@ -565,10 +671,15 @@ class DatabaseMigration {
       queries.push(`INSERT INTO state(name, number, string) VALUES ('last_hashrates_indexing', 0, NULL)`);
     }
 
-    if (version < 9  && isBitcoin === true) {
+    if (version < 9 && isBitcoin === true) {
       queries.push(`INSERT INTO state(name, number, string) VALUES ('last_weekly_hashrates_indexing', 0, NULL)`);
     }
 
+    if (version < 58) {
+      queries.push(`DELETE FROM state WHERE name = 'last_hashrates_indexing'`);
+      queries.push(`DELETE FROM state WHERE name = 'last_weekly_hashrates_indexing'`);
+    }
+
     return queries;
   }
 
@@ -715,6 +826,28 @@ class DatabaseMigration {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
   }
 
+  private getAdditionalBlocksDataQuery(): string {
+    return `ALTER TABLE blocks
+      ADD median_timestamp timestamp NOT NULL,
+      ADD coinbase_address varchar(100) NULL,
+      ADD coinbase_signature varchar(500) NULL,
+      ADD coinbase_signature_ascii varchar(500) NULL,
+      ADD avg_tx_size double unsigned NOT NULL,
+      ADD total_inputs int unsigned NOT NULL,
+      ADD total_outputs int unsigned NOT NULL,
+      ADD total_output_amt bigint unsigned NOT NULL,
+      ADD fee_percentiles longtext NULL,
+      ADD median_fee_amt int unsigned NULL,
+      ADD segwit_total_txs int unsigned NOT NULL,
+      ADD segwit_total_size int unsigned NOT NULL,
+      ADD segwit_total_weight int unsigned NOT NULL,
+      ADD header varchar(160) NOT NULL,
+      ADD utxoset_change int NOT NULL,
+      ADD utxoset_size int unsigned NULL,
+      ADD total_input_amt bigint unsigned NULL
+    `;
+  }
+
   private getCreateDailyStatsTableQuery(): string {
     return `CREATE TABLE IF NOT EXISTS hashrates (
       hashrate_timestamp timestamp NOT NULL,
@@ -913,24 +1046,77 @@ class DatabaseMigration {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
   }
 
-  public async $truncateIndexedData(tables: string[]) {
-    const allowedTables = ['blocks', 'hashrates', 'prices'];
+  private getCreateCompactCPFPTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS compact_cpfp_clusters (
+      root binary(32) NOT NULL,
+      height int(10) NOT NULL,
+      txs BLOB DEFAULT NULL,
+      fee_rate float unsigned,
+      PRIMARY KEY (root),
+      INDEX (height)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
 
+  private getCreateCompactTransactionsTableQuery(): string {
+    return `CREATE TABLE IF NOT EXISTS compact_transactions (
+      txid binary(32) NOT NULL,
+      cluster binary(32) DEFAULT NULL,
+      PRIMARY KEY (txid)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;`;
+  }
+
+  public async $blocksReindexingTruncate(): Promise<void> {
+    logger.warn(`Truncating pools, blocks, hashrates and difficulty_adjustments tables for re-indexing (using '--reindex-blocks'). You can cancel this command within 5 seconds`);
+    await Common.sleep$(5000);
+
+    await this.$executeQuery(`TRUNCATE blocks`);
+    await this.$executeQuery(`TRUNCATE hashrates`);
+    await this.$executeQuery(`TRUNCATE difficulty_adjustments`);
+    await this.$executeQuery('DELETE FROM `pools`');
+    await this.$executeQuery('ALTER TABLE pools AUTO_INCREMENT = 1');
+    await this.$executeQuery(`UPDATE state SET string = NULL WHERE name = 'pools_json_sha'`);
+  }
+
+  private async $convertCompactCpfpTables(): Promise<void> {
     try {
-      for (const table of tables) {
-        if (!allowedTables.includes(table)) {
-          logger.debug(`Table ${table} cannot to be re-indexed (not allowed)`);
-          continue;
+      const batchSize = 250;
+      const maxHeight = await blocksRepository.$mostRecentBlockHeight() || 0;
+      const [minHeightRows]: any = await DB.query(`SELECT MIN(height) AS minHeight from cpfp_clusters`);
+      const minHeight = (minHeightRows.length && minHeightRows[0].minHeight != null) ? minHeightRows[0].minHeight : maxHeight;
+      let height = maxHeight;
+
+      // Logging
+      let timer = new Date().getTime() / 1000;
+      const startedAt = new Date().getTime() / 1000;
+
+      while (height > minHeight) {
+        const [rows] = await DB.query(
+          `
+            SELECT * from cpfp_clusters
+            WHERE height <= ? AND height > ?
+            ORDER BY height
+          `,
+          [height, height - batchSize]
+        ) as RowDataPacket[][];
+        if (rows?.length) {
+          await cpfpRepository.$batchSaveClusters(rows.map(row => {
+            return {
+              root: row.root,
+              height: row.height,
+              txs: JSON.parse(row.txs),
+              effectiveFeePerVsize: row.fee_rate,
+            };
+          }));
         }
 
-        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`);
+        const elapsed = new Date().getTime() / 1000 - timer;
+        const runningFor = new Date().getTime() / 1000 - startedAt;
+        logger.debug(`Migrated cpfp data from block ${height} to ${height - batchSize} in ${elapsed.toFixed(2)} seconds | total elapsed: ${runningFor.toFixed(2)} seconds`);
+        timer = new Date().getTime() / 1000;
+        height -= batchSize;
       }
     } catch (e) {
-      logger.warn(`Unable to erase indexed data`);
+      logger.warn(`Failed to migrate cpfp transaction data`);
     }
   }
 }

backend/src/api/difficulty-adjustment.ts

@@ -9,9 +9,11 @@ export interface DifficultyAdjustment {
   remainingBlocks: number;       // Block count
   remainingTime: number;         // Duration of time in ms
   previousRetarget: number;      // Percent: -75 to 300
+  previousTime: number;          // Unix time in ms
   nextRetargetHeight: number;    // Block Height
   timeAvg: number;               // Duration of time in ms
   timeOffset: number;            // (Testnet) Time since last block (cap @ 20min) in ms
+  expectedBlocks: number;         // Block count
 }
 
 export function calcDifficultyAdjustment(
@@ -22,31 +24,29 @@ export function calcDifficultyAdjustment(
   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 diffSeconds = Math.max(0, 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;
+  const expectedBlocks = diffSeconds / BLOCK_SECONDS_TARGET;
+  const actualTimespan = (blocksInEpoch === 2015 ? latestBlockTimestamp : nowSeconds) - DATime;
 
   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;
-    }
+  let timeAvgSecs = blocksInEpoch ? diffSeconds / blocksInEpoch : BLOCK_SECONDS_TARGET;
+
+  difficultyChange = (BLOCK_SECONDS_TARGET / (actualTimespan / (blocksInEpoch + 1)) - 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,
@@ -74,9 +74,11 @@ export function calcDifficultyAdjustment(
     remainingBlocks,
     remainingTime,
     previousRetarget,
+    previousTime: DATime,
     nextRetargetHeight,
     timeAvg,
     timeOffset,
+    expectedBlocks,
   };
 }
 

backend/src/api/disk-cache.ts

@@ -7,68 +7,174 @@ import logger from '../logger';
 import config from '../config';
 import { TransactionExtended } from '../mempool.interfaces';
 import { Common } from './common';
+import rbfCache from './rbf-cache';
 
 class DiskCache {
-  private cacheSchemaVersion = 1;
+  private cacheSchemaVersion = 3;
+  private rbfCacheSchemaVersion = 1;
 
+  private static TMP_FILE_NAME = config.MEMPOOL.CACHE_DIR + '/tmp-cache.json';
+  private static TMP_FILE_NAMES = config.MEMPOOL.CACHE_DIR + '/tmp-cache{number}.json';
   private static FILE_NAME = config.MEMPOOL.CACHE_DIR + '/cache.json';
   private static FILE_NAMES = config.MEMPOOL.CACHE_DIR + '/cache{number}.json';
+  private static TMP_RBF_FILE_NAME = config.MEMPOOL.CACHE_DIR + '/tmp-rbfcache.json';
+  private static RBF_FILE_NAME = config.MEMPOOL.CACHE_DIR + '/rbfcache.json';
   private static CHUNK_FILES = 25;
   private isWritingCache = false;
+  private ignoreBlocksCache = false;
 
-  constructor() { }
+  private semaphore: { resume: (() => void)[], locks: number } = {
+    resume: [],
+    locks: 0,
+  };
 
-  async $saveCacheToDisk(): Promise<void> {
+  constructor() {
+    if (!cluster.isPrimary) {
+      return;
+    }
+    process.on('SIGINT', (e) => {
+      this.$saveCacheToDisk(true);
+      process.exit(0);
+    });
+  }
+
+  async $saveCacheToDisk(sync: boolean = false): Promise<void> {
     if (!cluster.isPrimary) {
       return;
     }
     if (this.isWritingCache) {
-      logger.debug('Saving cache already in progress. Skipping.')
+      logger.debug('Saving cache already in progress. Skipping.');
       return;
     }
     try {
-      logger.debug('Writing mempool and blocks data to disk cache (async)...');
+      logger.debug(`Writing mempool and blocks data to disk cache (${ sync ? 'sync' : 'async' })...`);
       this.isWritingCache = true;
 
       const mempool = memPool.getMempool();
       const mempoolArray: TransactionExtended[] = [];
       for (const tx in mempool) {
-        mempoolArray.push(mempool[tx]);
+        if (mempool[tx]) {
+          mempoolArray.push(mempool[tx]);
+        }
       }
 
       Common.shuffleArray(mempoolArray);
 
       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' });
-      for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
-        await fsPromises.writeFile(DiskCache.FILE_NAMES.replace('{number}', i.toString()), JSON.stringify({
+      if (sync) {
+        fs.writeFileSync(DiskCache.TMP_FILE_NAME, JSON.stringify({
+          network: config.MEMPOOL.NETWORK,
+          cacheSchemaVersion: this.cacheSchemaVersion,
+          blocks: blocks.getBlocks(),
+          blockSummaries: blocks.getBlockSummaries(),
           mempool: {},
           mempoolArray: mempoolArray.splice(0, chunkSize),
         }), { flag: 'w' });
+        for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
+          fs.writeFileSync(DiskCache.TMP_FILE_NAMES.replace('{number}', i.toString()), JSON.stringify({
+            mempool: {},
+            mempoolArray: mempoolArray.splice(0, chunkSize),
+          }), { flag: 'w' });
+        }
+
+        fs.renameSync(DiskCache.TMP_FILE_NAME, DiskCache.FILE_NAME);
+        for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
+          fs.renameSync(DiskCache.TMP_FILE_NAMES.replace('{number}', i.toString()), DiskCache.FILE_NAMES.replace('{number}', i.toString()));
+        }
+      } else {
+        await this.$yield();
+        await fsPromises.writeFile(DiskCache.TMP_FILE_NAME, JSON.stringify({
+          network: config.MEMPOOL.NETWORK,
+          cacheSchemaVersion: this.cacheSchemaVersion,
+          blocks: blocks.getBlocks(),
+          blockSummaries: blocks.getBlockSummaries(),
+          mempool: {},
+          mempoolArray: mempoolArray.splice(0, chunkSize),
+        }), { flag: 'w' });
+        for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
+          await this.$yield();
+          await fsPromises.writeFile(DiskCache.TMP_FILE_NAMES.replace('{number}', i.toString()), JSON.stringify({
+            mempool: {},
+            mempoolArray: mempoolArray.splice(0, chunkSize),
+          }), { flag: 'w' });
+        }
+
+        await fsPromises.rename(DiskCache.TMP_FILE_NAME, DiskCache.FILE_NAME);
+        for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
+          await fsPromises.rename(DiskCache.TMP_FILE_NAMES.replace('{number}', i.toString()), DiskCache.FILE_NAMES.replace('{number}', i.toString()));
+        }
       }
+
       logger.debug('Mempool and blocks data saved to disk cache');
       this.isWritingCache = false;
     } catch (e) {
       logger.warn('Error writing to cache file: ' + (e instanceof Error ? e.message : e));
       this.isWritingCache = false;
     }
-  }
 
-  wipeCache() {
-    fs.unlinkSync(DiskCache.FILE_NAME);
-    for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
-      fs.unlinkSync(DiskCache.FILE_NAMES.replace('{number}', i.toString()));
+    try {
+      logger.debug('Writing rbf data to disk cache (async)...');
+      this.isWritingCache = true;
+      const rbfData = rbfCache.dump();
+      if (sync) {
+        fs.writeFileSync(DiskCache.TMP_RBF_FILE_NAME, JSON.stringify({
+          network: config.MEMPOOL.NETWORK,
+          rbfCacheSchemaVersion: this.rbfCacheSchemaVersion,
+          rbf: rbfData,
+        }), { flag: 'w' });
+        fs.renameSync(DiskCache.TMP_RBF_FILE_NAME, DiskCache.RBF_FILE_NAME);
+      } else {
+        await fsPromises.writeFile(DiskCache.TMP_RBF_FILE_NAME, JSON.stringify({
+          network: config.MEMPOOL.NETWORK,
+          rbfCacheSchemaVersion: this.rbfCacheSchemaVersion,
+          rbf: rbfData,
+        }), { flag: 'w' });
+        await fsPromises.rename(DiskCache.TMP_RBF_FILE_NAME, DiskCache.RBF_FILE_NAME);
+      }
+      logger.debug('Rbf data saved to disk cache');
+      this.isWritingCache = false;
+    } catch (e) {
+      logger.warn('Error writing rbf data to cache file: ' + (e instanceof Error ? e.message : e));
+      this.isWritingCache = false;
     }
   }
 
-  loadMempoolCache() {
+  wipeCache(): void {
+    logger.notice(`Wiping nodejs backend cache/cache*.json files`);
+    try {
+      fs.unlinkSync(DiskCache.FILE_NAME);
+    } catch (e: any) {
+      if (e?.code !== 'ENOENT') {
+        logger.err(`Cannot wipe cache file ${DiskCache.FILE_NAME}. Exception ${JSON.stringify(e)}`);
+      }
+    }
+
+    for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
+      const filename = DiskCache.FILE_NAMES.replace('{number}', i.toString());
+      try {
+        fs.unlinkSync(filename);
+      } catch (e: any) {
+        if (e?.code !== 'ENOENT') {
+          logger.err(`Cannot wipe cache file ${filename}. Exception ${JSON.stringify(e)}`);
+        }
+      }
+    }
+  }
+
+  wipeRbfCache() {
+    logger.notice(`Wipping nodejs backend cache/rbfcache.json file`);
+
+    try {
+      fs.unlinkSync(DiskCache.RBF_FILE_NAME);
+    } catch (e: any) {
+      if (e?.code !== 'ENOENT') {
+        logger.err(`Cannot wipe cache file ${DiskCache.RBF_FILE_NAME}. Exception ${JSON.stringify(e)}`);
+      }
+    }
+  }
+
+  async $loadMempoolCache(): Promise<void> {
     if (!fs.existsSync(DiskCache.FILE_NAME)) {
       return;
     }
@@ -82,9 +188,14 @@ class DiskCache {
           logger.notice('Disk cache contains an outdated schema version. Clearing it and skipping the cache loading.');
           return this.wipeCache();
         }
+        if (data.network && data.network !== config.MEMPOOL.NETWORK) {
+          logger.notice('Disk cache contains data from a different network. Clearing it and skipping the cache loading.');
+          return this.wipeCache();
+        }
 
         if (data.mempoolArray) {
           for (const tx of data.mempoolArray) {
+            delete tx.uid;
             data.mempool[tx.txid] = tx;
           }
         }
@@ -97,6 +208,7 @@ class DiskCache {
             const cacheData2 = JSON.parse(fs.readFileSync(fileName, 'utf8'));
             if (cacheData2.mempoolArray) {
               for (const tx of cacheData2.mempoolArray) {
+                delete tx.uid;
                 data.mempool[tx.txid] = tx;
               }
             } else {
@@ -104,16 +216,74 @@ class DiskCache {
             }
           }
         } catch (e) {
-          logger.info('Error parsing ' + fileName + '. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
+          logger.err('Error parsing ' + fileName + '. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
         }
       }
 
-      memPool.setMempool(data.mempool);
-      blocks.setBlocks(data.blocks);
-      blocks.setBlockSummaries(data.blockSummaries || []);
+      await memPool.$setMempool(data.mempool);
+      if (!this.ignoreBlocksCache) {
+        blocks.setBlocks(data.blocks);
+        blocks.setBlockSummaries(data.blockSummaries || []);
+      } else {
+        logger.info('Re-saving cache with empty recent blocks data');
+        await this.$saveCacheToDisk(true);
+      }
     } catch (e) {
       logger.warn('Failed to parse mempoool and blocks cache. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
     }
+
+    try {
+      let rbfData: any = {};
+      const rbfCacheData = fs.readFileSync(DiskCache.RBF_FILE_NAME, 'utf8');
+      if (rbfCacheData) {
+        logger.info('Restoring rbf data from disk cache');
+        rbfData = JSON.parse(rbfCacheData);
+        if (rbfData.rbfCacheSchemaVersion === undefined || rbfData.rbfCacheSchemaVersion !== this.rbfCacheSchemaVersion) {
+          logger.notice('Rbf disk cache contains an outdated schema version. Clearing it and skipping the cache loading.');
+          return this.wipeRbfCache();
+        }
+        if (rbfData.network && rbfData.network !== config.MEMPOOL.NETWORK) {
+          logger.notice('Rbf disk cache contains data from a different network. Clearing it and skipping the cache loading.');
+          return this.wipeRbfCache();
+        }
+      }
+
+      if (rbfData?.rbf) {
+        rbfCache.load(rbfData.rbf);
+      }
+    } catch (e) {
+      logger.warn('Failed to parse rbf cache. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  private $yield(): Promise<void> {
+    if (this.semaphore.locks) {
+      logger.debug('Pause writing mempool and blocks data to disk cache (async)');
+      return new Promise((resolve) => {
+        this.semaphore.resume.push(resolve);
+      });
+    } else {
+      return Promise.resolve();
+    }
+  }
+
+  public lock(): void {
+    this.semaphore.locks++;
+  }
+
+  public unlock(): void {
+    this.semaphore.locks = Math.max(0, this.semaphore.locks - 1);
+    if (!this.semaphore.locks && this.semaphore.resume.length) {
+      const nextResume = this.semaphore.resume.shift();
+      if (nextResume) {
+        logger.debug('Resume writing mempool and blocks data to disk cache (async)');
+        nextResume();
+      }
+    }
+  }
+
+  public setIgnoreBlocksCache(): void {
+    this.ignoreBlocksCache = true;
   }
 }
 

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

@@ -80,7 +80,7 @@ class ChannelsApi {
 
   public async $searchChannelsById(search: string): Promise<any[]> {
     try {
-      const searchStripped = search.replace('%', '') + '%';
+      const searchStripped = search.replace(/[^0-9x]/g, '') + '%';
       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;
@@ -117,6 +117,26 @@ class ChannelsApi {
     }
   }
 
+  public async $getPenaltyClosedChannels(): Promise<any[]> {
+    try {
+      const query = `
+        SELECT n1.alias AS alias_left,
+          n2.alias AS alias_right,
+          channels.*
+        FROM channels
+        LEFT JOIN nodes AS n1 ON n1.public_key = channels.node1_public_key
+        LEFT JOIN nodes AS n2 ON n2.public_key = channels.node2_public_key
+        WHERE channels.status = 2 AND channels.closing_reason = 3
+        ORDER BY closing_date DESC
+      `;
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('$getPenaltyClosedChannels 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 != ''`;
@@ -559,6 +579,17 @@ class ChannelsApi {
     const policy1: Partial<ILightningApi.RoutingPolicy> = channel.node1_policy || {};
     const policy2: Partial<ILightningApi.RoutingPolicy> = channel.node2_policy || {};
 
+    // https://github.com/mempool/mempool/issues/3006
+    if ((channel.last_update ?? 0) < 1514736061) { // January 1st 2018
+      channel.last_update = null;
+    }
+    if ((policy1.last_update ?? 0) < 1514736061) { // January 1st 2018
+      policy1.last_update = null;
+    }
+    if ((policy2.last_update ?? 0) < 1514736061) { // January 1st 2018
+      policy2.last_update = null;
+    }
+
     const query = `INSERT INTO channels
       (
         id,
@@ -670,9 +701,7 @@ class ChannelsApi {
         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`);
+        logger.debug(`Marked ${result[0].changedRows} channels as inactive because they are not in the graph`, logger.tags.ln);
       }
     } catch (e) {
       logger.err('$setChannelsInactive() error: ' + (e instanceof Error ? e.message : e));

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

@@ -11,6 +11,7 @@ class ChannelsRoutes {
       .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.$getChannelsForNode)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/penalties', this.$getPenaltyClosedChannels)
       .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels-geo', this.$getAllChannelsGeo)
       .get(config.MEMPOOL.API_URL_PREFIX + 'lightning/channels-geo/:publicKey', this.$getAllChannelsGeo)
     ;
@@ -108,6 +109,18 @@ class ChannelsRoutes {
     }
   }
 
+  private async $getPenaltyClosedChannels(req: Request, res: Response): Promise<void> {
+    try {
+      const channels = await channelsApi.$getPenaltyClosedChannels();
+      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);
+    }
+  }
+
   private async $getAllChannelsGeo(req: Request, res: Response) {
     try {
       const style: string = typeof req.query.style === 'string' ? req.query.style : '';

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

@@ -3,6 +3,7 @@ import DB from '../../database';
 import { ResultSetHeader } from 'mysql2';
 import { ILightningApi } from '../lightning/lightning-api.interface';
 import { ITopNodesPerCapacity, ITopNodesPerChannels } from '../../mempool.interfaces';
+import { bin2hex } from '../../utils/format';
 
 class NodesApi {
   public async $getWorldNodes(): Promise<any> {
@@ -56,7 +57,8 @@ class NodesApi {
           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
+          geo_names_country.names as country, geo_names_subdivision.names as subdivision,
+          features
         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
@@ -76,6 +78,23 @@ class NodesApi {
       node.city = JSON.parse(node.city);
       node.country = JSON.parse(node.country);
 
+      // Features      
+      node.features = JSON.parse(node.features);
+      node.featuresBits = null;
+      if (node.features) {
+        let maxBit = 0;
+        for (const feature of node.features) {
+          maxBit = Math.max(maxBit, feature.bit);
+        }
+        maxBit = Math.ceil(maxBit / 4) * 4 - 1;
+        
+        node.featuresBits = new Array(maxBit + 1).fill(0);
+        for (const feature of node.features) {
+          node.featuresBits[feature.bit] = 1;
+        }
+        node.featuresBits = bin2hex(node.featuresBits.reverse().join(''));
+      }
+
       // Active channels and capacity
       const activeChannelsStats: any = await this.$getActiveChannelsStats(public_key);
       node.active_channel_count = activeChannelsStats.active_channel_count ?? 0;
@@ -228,7 +247,7 @@ class NodesApi {
             nodes.capacity
           FROM nodes
           ORDER BY capacity DESC
-          LIMIT 100
+          LIMIT 6
         `;
 
         [rows] = await DB.query(query);
@@ -269,14 +288,26 @@ class NodesApi {
       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
+          SELECT
+            nodes.public_key as publicKey,
+            IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
+            nodes.channels,
+            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;
+          LIMIT 6;
         `;
 
         [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);
+        }
       } else {
         query = `
           SELECT nodes.public_key AS publicKey, IF(nodes.alias = '', SUBSTRING(nodes.public_key, 1, 20), alias) as alias,
@@ -361,8 +392,14 @@ class NodesApi {
 
   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 publicKeySearch = search.replace(/[^a-zA-Z0-9]/g, '') + '%';
+      const aliasSearch = search
+        .replace(/[-_.]/g, ' ') // Replace all -_. characters with empty space. Eg: "ln.nicehash" becomes "ln nicehash".  
+        .replace(/[^a-zA-Z0-9 ]/g, '') // Remove all special characters and keep just A to Z, 0 to 9.
+        .split(' ')
+        .filter(key => key.length)
+        .map((search) => '+' + search + '*').join(' ');
+      // %keyword% is wildcard search and can't be indexed so it's slower as the node database grow. keyword% can be indexed but then you can't search for "Nicehash" and get result for ln.nicehash.com. So we use fulltext index for words "ln, nicehash, com" and nicehash* will find it instantly.
       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;
@@ -399,24 +436,24 @@ class NodesApi {
 
         if (!ispList[isp1]) {
           ispList[isp1] = {
-            id: channel.isp1ID.toString(),
+            ids: [channel.isp1ID],
             capacity: 0,
             channels: 0,
             nodes: {},
           };
-        } else if (ispList[isp1].id.indexOf(channel.isp1ID) === -1) {
-          ispList[isp1].id += ',' + channel.isp1ID.toString();
+        } else if (ispList[isp1].ids.includes(channel.isp1ID) === false) {
+          ispList[isp1].ids.push(channel.isp1ID);
         }
 
         if (!ispList[isp2]) {
           ispList[isp2] = {
-            id: channel.isp2ID.toString(),
+            ids: [channel.isp2ID],
             capacity: 0,
             channels: 0,
             nodes: {},
           };
-        } else if (ispList[isp2].id.indexOf(channel.isp2ID) === -1) {
-          ispList[isp2].id += ',' + channel.isp2ID.toString();
+        } else if (ispList[isp2].ids.includes(channel.isp2ID) === false) {
+          ispList[isp2].ids.push(channel.isp2ID);
         }
         
         ispList[isp1].capacity += channel.capacity;
@@ -426,11 +463,11 @@ class NodesApi {
         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,
+          ispList[isp].ids.sort((a, b) => a - b).join(','),
           isp,
           ispList[isp].capacity,
           ispList[isp].channels,
@@ -624,6 +661,11 @@ class NodesApi {
    */
   public async $saveNode(node: ILightningApi.Node): Promise<void> {
     try {
+      // https://github.com/mempool/mempool/issues/3006
+      if ((node.last_update ?? 0) < 1514736061) { // January 1st 2018
+        node.last_update = null;
+      }
+  
       const sockets = (node.addresses?.map(a => a.addr).join(',')) ?? '';
       const query = `INSERT INTO nodes(
           public_key,
@@ -633,10 +675,19 @@ class NodesApi {
           alias_search,
           color,
           sockets,
-          status
+          status,
+          features
         )
-        VALUES (?, NOW(), FROM_UNIXTIME(?), ?, ?, ?, ?, 1)
-        ON DUPLICATE KEY UPDATE updated_at = FROM_UNIXTIME(?), alias = ?, alias_search = ?, color = ?, sockets = ?, status = 1`;
+        VALUES (?, NOW(), FROM_UNIXTIME(?), ?, ?, ?, ?, 1, ?)
+        ON DUPLICATE KEY UPDATE
+          updated_at = FROM_UNIXTIME(?),
+          alias = ?,
+          alias_search = ?,
+          color = ?,
+          sockets = ?,
+          status = 1,
+          features = ?
+      `;
 
       await DB.query(query, [
         node.pub_key,
@@ -645,11 +696,13 @@ class NodesApi {
         this.aliasToSearchText(node.alias),
         node.color,
         sockets,
+        JSON.stringify(node.features),
         node.last_update,
         node.alias,
         this.aliasToSearchText(node.alias),
         node.color,
         sockets,
+        JSON.stringify(node.features),
       ]);
     } catch (e) {
       logger.err('$saveNode() error: ' + (e instanceof Error ? e.message : e));
@@ -685,9 +738,7 @@ class NodesApi {
         )
       `);
       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`);
+        logger.debug(`Marked ${result[0].changedRows} nodes as inactive because they are not in the graph`, logger.tags.ln);
       }
     } catch (e) {
       logger.err('$setNodesInactive() error: ' + (e instanceof Error ? e.message : e));

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

@@ -41,13 +41,70 @@ class NodesRoutes {
       let nodes: any[] = [];
       switch (config.MEMPOOL.NETWORK) {
         case 'testnet':
-          nodesList = ['032c7c7819276c4f706a04df1a0f1e10a5495994a7be4c1d3d28ca766e5a2b957b', '025a7e38c2834dd843591a4d23d5f09cdeb77ddca85f673c2d944a14220ff14cf7', '0395e2731a1673ef21d7a16a727c4fc4d4c35a861c428ce2c819c53d2b81c8bd55', '032ab2028c0b614c6d87824e2373529652fd7e4221b4c70cc4da7c7005c49afcf0', '029001b22fe70b48bee12d014df91982eb85ff1bd404ec772d5c83c4ee3e88d2c3', '0212e2848d79f928411da5f2ff0a8c95ec6ccb5a09d2031b6f71e91309dcde63af', '03e871a2229523d34f76e6311ff197cfe7f26c2fbec13554b93a46f4e710c47dab', '032202ec98d976b0e928bd1d91924e8bd3eab07231fc39feb3737b010071073df8', '02fa7c5a948d03d563a9f36940c2205a814e594d17c0042ced242c71a857d72605', '039c14fdec2d958e3d14cebf657451bbd9e039196615785e82c917f274e3fb2205', '033589bbcb233ffc416cefd5437c7f37e9d7cb7942d405e39e72c4c846d9b37f18', '029293110441c6e2eacb57e1255bf6ef05c41a6a676fe474922d33c19f98a7d584'];
+          nodesList = [
+            '032c7c7819276c4f706a04df1a0f1e10a5495994a7be4c1d3d28ca766e5a2b957b',
+            '025a7e38c2834dd843591a4d23d5f09cdeb77ddca85f673c2d944a14220ff14cf7',
+            '0395e2731a1673ef21d7a16a727c4fc4d4c35a861c428ce2c819c53d2b81c8bd55',
+            '032ab2028c0b614c6d87824e2373529652fd7e4221b4c70cc4da7c7005c49afcf0',
+            '029001b22fe70b48bee12d014df91982eb85ff1bd404ec772d5c83c4ee3e88d2c3',
+            '0212e2848d79f928411da5f2ff0a8c95ec6ccb5a09d2031b6f71e91309dcde63af',
+            '03e871a2229523d34f76e6311ff197cfe7f26c2fbec13554b93a46f4e710c47dab',
+            '032202ec98d976b0e928bd1d91924e8bd3eab07231fc39feb3737b010071073df8',
+            '02fa7c5a948d03d563a9f36940c2205a814e594d17c0042ced242c71a857d72605',
+            '039c14fdec2d958e3d14cebf657451bbd9e039196615785e82c917f274e3fb2205',
+            '033589bbcb233ffc416cefd5437c7f37e9d7cb7942d405e39e72c4c846d9b37f18',
+            '029293110441c6e2eacb57e1255bf6ef05c41a6a676fe474922d33c19f98a7d584',
+            '0235ad0b56ed8c42c4354444c24e971c05e769ec0b5fb0ccea42880095dc02ea2c',
+            '029700819a37afea630f80e6cc461f3fd3c4ace2598a21cfbbe64d1c78d0ee69a5',
+            '02c2d8b2dbf87c7894af2f1d321290e2fe6db5446cd35323987cee98f06e2e0075',
+            '030b0ca1ea7b1075716d2a555630e6fd47ef11bc7391fe68963ec06cf370a5e382',
+            '031adb9eb2d66693f85fa31a4adca0319ba68219f3ad5f9a2ef9b34a6b40755fa1',
+            '02ccd07faa47eda810ecf5591ccf5ca50f6c1034d0d175052898d32a00b9bae24f',
+          ];
           break;
         case 'signet':
-          nodesList = ['03ddab321b760433cbf561b615ef62ac7d318630c5f51d523aaf5395b90b751956', '033d92c7bfd213ef1b34c90e985fb5dc77f9ec2409d391492484e57a44c4aca1de', '02ad010dda54253c1eb9efe38b0760657a3b43ecad62198c359c051c9d99d45781', '025196512905b8a3f1597428b867bec63ec9a95e5089eb7dc7e63e2d2691669029', '027c625aa1fbe3768db68ebcb05b53b6dc0ce68b7b54b8900d326d167363e684fe', '03f1629af3101fcc56b7aac2667016be84e3defbf3d0c8719f836c9b41c9a57a43', '02dfb81e2f7a3c4c9e8a51b70ef82b4a24549cc2fab1f5b2fd636501774a918991', '02d01ccf832944c68f10d39006093769c5b8bda886d561b128534e313d729fdb34', '02499ed23027d4698a6904ff4ec1b6085a61f10b9a6937f90438f9947e38e8ea86', '038310e3a786340f2bd7770704c7ccfe560fd163d9a1c99d67894597419d12cbf7', '03e5e9d879b72c7d67ecd483bae023bd33e695bb32b981a4021260f7b9d62bc761', '028d16e1a0ace4c0c0a421536d8d32ce484dfe6e2f726b7b0e7c30f12a195f8cc7'];
+          nodesList = [
+            '03ddab321b760433cbf561b615ef62ac7d318630c5f51d523aaf5395b90b751956',
+            '033d92c7bfd213ef1b34c90e985fb5dc77f9ec2409d391492484e57a44c4aca1de',
+            '02ad010dda54253c1eb9efe38b0760657a3b43ecad62198c359c051c9d99d45781',
+            '025196512905b8a3f1597428b867bec63ec9a95e5089eb7dc7e63e2d2691669029',
+            '027c625aa1fbe3768db68ebcb05b53b6dc0ce68b7b54b8900d326d167363e684fe',
+            '03f1629af3101fcc56b7aac2667016be84e3defbf3d0c8719f836c9b41c9a57a43',
+            '02dfb81e2f7a3c4c9e8a51b70ef82b4a24549cc2fab1f5b2fd636501774a918991',
+            '02d01ccf832944c68f10d39006093769c5b8bda886d561b128534e313d729fdb34',
+            '02499ed23027d4698a6904ff4ec1b6085a61f10b9a6937f90438f9947e38e8ea86',
+            '038310e3a786340f2bd7770704c7ccfe560fd163d9a1c99d67894597419d12cbf7',
+            '03e5e9d879b72c7d67ecd483bae023bd33e695bb32b981a4021260f7b9d62bc761',
+            '028d16e1a0ace4c0c0a421536d8d32ce484dfe6e2f726b7b0e7c30f12a195f8cc7',
+            '02ff690d06c187ab994bf83c5a2114fe5bf50112c2c817af0f788f736be9fa2070',
+            '02a9f570c51a2526a5ee85802e88f9281bed771eb66a0c8a7d898430dd5d0eae45',
+            '038c3de773255d3bd7a50e31e58d423baac5c90826a74d75e64b74c95475de1097',
+            '0242c7f7d315095f37ad1421ae0a2fc967d4cbe65b61b079c5395a769436959853',
+            '02a909e70eb03742f12666ebb1f56ac42a5fbaab0c0e8b5b1df4aa9f10f8a09240',
+            '03a26efa12489803c07f3ac2f1dba63812e38f0f6e866ce3ebb34df7de1f458cd2',
+          ];
           break;
         default:
-          nodesList = ['03fbc17549ec667bccf397ababbcb4cdc0e3394345e4773079ab2774612ec9be61', '03da9a8623241ccf95f19cd645c6cecd4019ac91570e976eb0a128bebbc4d8a437', '03ca5340cf85cb2e7cf076e489f785410838de174e40be62723e8a60972ad75144', '0238bd27f02d67d6c51e269692bc8c9a32357a00e7777cba7f4f1f18a2a700b108', '03f983dcabed6baa1eab5b56c8b2e8fdc846ab3fd931155377897335e85a9fa57c', '03e399589533581e48796e29a825839a010036a61b20744fda929d6709fcbffcc5', '021f5288b5f72c42cd0d8801086af7ce09a816d8ee9a4c47a4b436399b26cb601a', '032b01b7585f781420cd4148841a82831ba37fa952342052cec16750852d4f2dd9', '02848036488d4b8fb1f1c4064261ec36151f43b085f0b51bd239ade3ddfc940c34', '02b6b1640fe029e304c216951af9fbefdb23b0bdc9baaf327540d31b6107841fdf', '03694289827203a5b3156d753071ddd5bf92e371f5a462943f9555eef6d2d6606c', '0283d850db7c3e8ea7cc9c4abc7afaab12bbdf72b677dcba1d608350d2537d7d43'];
+          nodesList = [
+            '03fbc17549ec667bccf397ababbcb4cdc0e3394345e4773079ab2774612ec9be61',
+            '03da9a8623241ccf95f19cd645c6cecd4019ac91570e976eb0a128bebbc4d8a437',
+            '03ca5340cf85cb2e7cf076e489f785410838de174e40be62723e8a60972ad75144',
+            '0238bd27f02d67d6c51e269692bc8c9a32357a00e7777cba7f4f1f18a2a700b108',
+            '03f983dcabed6baa1eab5b56c8b2e8fdc846ab3fd931155377897335e85a9fa57c',
+            '03e399589533581e48796e29a825839a010036a61b20744fda929d6709fcbffcc5',
+            '021f5288b5f72c42cd0d8801086af7ce09a816d8ee9a4c47a4b436399b26cb601a',
+            '032b01b7585f781420cd4148841a82831ba37fa952342052cec16750852d4f2dd9',
+            '02848036488d4b8fb1f1c4064261ec36151f43b085f0b51bd239ade3ddfc940c34',
+            '02b6b1640fe029e304c216951af9fbefdb23b0bdc9baaf327540d31b6107841fdf',
+            '03694289827203a5b3156d753071ddd5bf92e371f5a462943f9555eef6d2d6606c',
+            '0283d850db7c3e8ea7cc9c4abc7afaab12bbdf72b677dcba1d608350d2537d7d43',
+            '02521287789f851268a39c9eccc9d6180d2c614315b583c9e6ae0addbd6d79df06',
+            '0258c2a7b7f8af2585b4411b1ec945f70988f30412bb1df179de941f14d0b1bc3e',
+            '03c3389ff1a896f84d921ed01a19fc99c6724ce8dc4b960cd3b7b2362b62cd60d7',
+            '038d118996b3eaa15dcd317b32a539c9ecfdd7698f204acf8a087336af655a9192',
+            '02a928903d93d78877dacc3642b696128a3636e9566dd42d2d132325b2c8891c09',
+            '0328cd17f3a9d3d90b532ade0d1a67e05eb8a51835b3dce0a2e38eac04b5a62a57',
+          ];
       }
 
       for (let pubKey of nodesList) {

backend/src/api/fiat-conversion.ts

@@ -1,123 +0,0 @@
-import logger from '../logger';
-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 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() {
-    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 ${config.PRICE_DATA_SERVER.CLEARNET_URL}`);
-    }
-    setInterval(this.updateCurrency.bind(this), 1000 * config.MEMPOOL.PRICE_FEED_UPDATE_INTERVAL);
-    this.updateCurrency();
-  }
-
-  public getConversionRates() {
-    return this.conversionRates;
-  }
-
-  private async updateCurrency(): Promise<void> {
-    type axiosOptions = {
-      headers: {
-        'User-Agent': string
-      };
-      timeout: number;
-      httpAgent?: http.Agent;
-      httpsAgent?: https.Agent;
-    }
-    const setDelay = (secs: number = 1): Promise<void> => new Promise(resolve => setTimeout(() => resolve(), secs * 1000));
-    const fiatConversionUrl = (config.SOCKS5PROXY.ENABLED === true) && (config.SOCKS5PROXY.USE_ONION === true) ? config.PRICE_DATA_SERVER.TOR_URL : config.PRICE_DATA_SERVER.CLEARNET_URL;
-    const isHTTP = (new URL(fiatConversionUrl).protocol.split(':')[0] === 'http') ? true : false;
-    const axiosOptions: axiosOptions = {
-      headers: {
-        'User-Agent': (config.MEMPOOL.USER_AGENT === 'mempool') ? `mempool/v${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++;
-      }
-    }
-  }
-}
-
-export default new FiatConversion();

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

@@ -141,13 +141,13 @@ export default class CLightningClient extends EventEmitter implements AbstractLi
       // 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 ${rpcPath}/bitcoin instead.`)
-        logger.warn(`[CLightningClient] specifying the main lightning data directory is deprecated, please specify the network directory explicitly.\n`)
+        logger.warn(`${rpcPath}/lightning-rpc is missing, using the bitcoin mainnet subdirectory at ${rpcPath}/bitcoin instead.`, logger.tags.ln)
+        logger.warn(`specifying the main lightning data directory is deprecated, please specify the network directory explicitly.\n`, logger.tags.ln)
         rpcPath = path.join(rpcPath, 'bitcoin', 'lightning-rpc')
       }
     }
 
-    logger.debug(`[CLightningClient] Connecting to ${rpcPath}`);
+    logger.debug(`Connecting to ${rpcPath}`, logger.tags.ln);
 
     super();
     this.rpcPath = rpcPath;
@@ -172,19 +172,19 @@ export default class CLightningClient extends EventEmitter implements AbstractLi
 
     this.clientConnectionPromise = new Promise<void>(resolve => {
       _self.client.on('connect', () => {
-        logger.info(`[CLightningClient] Lightning client connected`);
+        logger.info(`CLightning client connected`, logger.tags.ln);
         _self.reconnectWait = 1;
         resolve();
       });
 
       _self.client.on('end', () => {
-        logger.err('[CLightningClient] Lightning client connection closed, reconnecting');
+        logger.err(`CLightning client connection closed, reconnecting`, logger.tags.ln);
         _self.increaseWaitTime();
         _self.reconnect();
       });
 
       _self.client.on('error', error => {
-        logger.err(`[CLightningClient] Lightning client connection error: ${error}`);
+        logger.err(`CLightning client connection error: ${error}`, logger.tags.ln);
         _self.increaseWaitTime();
         _self.reconnect();
       });
@@ -196,7 +196,6 @@ export default class CLightningClient extends EventEmitter implements AbstractLi
         return;
       }
       const data = JSON.parse(line);
-      // logger.debug(`[CLightningClient] #${data.id} <-- ${JSON.stringify(data.error || data.result)}`);
       _self.emit('res:' + data.id, data);
     });
   }
@@ -217,7 +216,7 @@ export default class CLightningClient extends EventEmitter implements AbstractLi
     }
 
     this.reconnectTimeout = setTimeout(() => {
-      logger.debug('[CLightningClient] Trying to reconnect...');
+      logger.debug(`Trying to reconnect...`, logger.tags.ln);
 
       _self.client.connect(_self.rpcPath);
       _self.reconnectTimeout = null;
@@ -235,7 +234,6 @@ export default class CLightningClient extends EventEmitter implements AbstractLi
       id: '' + callInt
     };
 
-    // logger.debug(`[CLightningClient] #${callInt} --> ${method} ${args}`);
 
     // Wait for the client to connect
     return this.clientConnectionPromise

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

@@ -2,6 +2,90 @@ import { ILightningApi } from '../lightning-api.interface';
 import FundingTxFetcher from '../../../tasks/lightning/sync-tasks/funding-tx-fetcher';
 import logger from '../../../logger';
 import { Common } from '../../common';
+import { hex2bin } from '../../../utils/format';
+import config from '../../../config';
+
+// https://github.com/lightningnetwork/lnd/blob/master/lnwire/features.go
+export enum FeatureBits {
+	DataLossProtectRequired = 0,
+	DataLossProtectOptional = 1,
+	InitialRoutingSync = 3,
+	UpfrontShutdownScriptRequired = 4,
+	UpfrontShutdownScriptOptional = 5,
+	GossipQueriesRequired = 6,
+	GossipQueriesOptional = 7,
+	TLVOnionPayloadRequired = 8,
+	TLVOnionPayloadOptional = 9,
+	StaticRemoteKeyRequired = 12,
+	StaticRemoteKeyOptional = 13,
+	PaymentAddrRequired = 14,
+	PaymentAddrOptional = 15,
+	MPPRequired = 16,
+	MPPOptional = 17,
+	WumboChannelsRequired = 18,
+	WumboChannelsOptional = 19,
+	AnchorsRequired = 20,
+	AnchorsOptional = 21,
+	AnchorsZeroFeeHtlcTxRequired = 22,
+	AnchorsZeroFeeHtlcTxOptional = 23,
+	ShutdownAnySegwitRequired = 26,
+	ShutdownAnySegwitOptional = 27,
+	AMPRequired = 30,
+	AMPOptional = 31,
+	ExplicitChannelTypeRequired = 44,
+	ExplicitChannelTypeOptional = 45,
+	ScidAliasRequired = 46,
+	ScidAliasOptional = 47,
+	PaymentMetadataRequired = 48,
+	PaymentMetadataOptional = 49,
+	ZeroConfRequired = 50,
+	ZeroConfOptional = 51,
+	KeysendRequired = 54,
+	KeysendOptional = 55,
+	ScriptEnforcedLeaseRequired = 2022,
+	ScriptEnforcedLeaseOptional = 2023,
+	MaxBolt11Feature = 5114,
+};
+  
+export const FeaturesMap = new Map<FeatureBits, string>([
+	[FeatureBits.DataLossProtectRequired, 'data-loss-protect'],
+	[FeatureBits.DataLossProtectOptional, 'data-loss-protect'],
+	[FeatureBits.InitialRoutingSync, 'initial-routing-sync'],
+	[FeatureBits.UpfrontShutdownScriptRequired, 'upfront-shutdown-script'],
+	[FeatureBits.UpfrontShutdownScriptOptional, 'upfront-shutdown-script'],
+	[FeatureBits.GossipQueriesRequired, 'gossip-queries'],
+	[FeatureBits.GossipQueriesOptional, 'gossip-queries'],
+	[FeatureBits.TLVOnionPayloadRequired, 'tlv-onion'],
+	[FeatureBits.TLVOnionPayloadOptional, 'tlv-onion'],
+	[FeatureBits.StaticRemoteKeyOptional, 'static-remote-key'],
+	[FeatureBits.StaticRemoteKeyRequired, 'static-remote-key'],
+	[FeatureBits.PaymentAddrOptional, 'payment-addr'],
+	[FeatureBits.PaymentAddrRequired, 'payment-addr'],
+	[FeatureBits.MPPOptional, 'multi-path-payments'],
+	[FeatureBits.MPPRequired, 'multi-path-payments'],
+	[FeatureBits.AnchorsRequired, 'anchor-commitments'],
+	[FeatureBits.AnchorsOptional, 'anchor-commitments'],
+	[FeatureBits.AnchorsZeroFeeHtlcTxRequired, 'anchors-zero-fee-htlc-tx'],
+	[FeatureBits.AnchorsZeroFeeHtlcTxOptional, 'anchors-zero-fee-htlc-tx'],
+	[FeatureBits.WumboChannelsRequired, 'wumbo-channels'],
+	[FeatureBits.WumboChannelsOptional, 'wumbo-channels'],
+	[FeatureBits.AMPRequired, 'amp'],
+	[FeatureBits.AMPOptional, 'amp'],
+	[FeatureBits.PaymentMetadataOptional, 'payment-metadata'],
+	[FeatureBits.PaymentMetadataRequired, 'payment-metadata'],
+	[FeatureBits.ExplicitChannelTypeOptional, 'explicit-commitment-type'],
+	[FeatureBits.ExplicitChannelTypeRequired, 'explicit-commitment-type'],
+	[FeatureBits.KeysendOptional, 'keysend'],
+	[FeatureBits.KeysendRequired, 'keysend'],
+	[FeatureBits.ScriptEnforcedLeaseRequired, 'script-enforced-lease'],
+	[FeatureBits.ScriptEnforcedLeaseOptional, 'script-enforced-lease'],
+	[FeatureBits.ScidAliasRequired, 'scid-alias'],
+	[FeatureBits.ScidAliasOptional, 'scid-alias'],
+	[FeatureBits.ZeroConfRequired, 'zero-conf'],
+	[FeatureBits.ZeroConfOptional, 'zero-conf'],
+	[FeatureBits.ShutdownAnySegwitRequired, 'shutdown-any-segwit'],
+	[FeatureBits.ShutdownAnySegwitOptional, 'shutdown-any-segwit'],
+]);
 
 /**
  * Convert a clightning "listnode" entry to a lnd node entry
@@ -16,10 +100,36 @@ export function convertNode(clNode: any): ILightningApi.Node {
       custom_records = undefined;
     }
   }
+
+  const nodeFeatures: ILightningApi.Feature[] = [];
+  const nodeFeaturesBinary = hex2bin(clNode.features).split('').reverse().join('');
+
+  for (let i = 0; i < nodeFeaturesBinary.length; i++) {
+    if (nodeFeaturesBinary[i] === '0') {
+      continue;
+    }
+    const feature = FeaturesMap.get(i);
+    if (!feature) {
+      nodeFeatures.push({
+        bit: i,
+        name: 'unknown',
+        is_required: i % 2 === 0,
+        is_known: false
+      });
+    } else {
+      nodeFeatures.push({
+        bit: i,
+        name: feature,
+        is_required: i % 2 === 0,
+        is_known: true
+      });
+    }
+  }
+
   return {
     alias: clNode.alias ?? '',
     color: `#${clNode.color ?? ''}`,
-    features: [], // TODO parse and return clNode.feature
+    features: nodeFeatures,
     pub_key: clNode.nodeid,
     addresses: clNode.addresses?.map((addr) => {
       let address = addr.address;
@@ -40,7 +150,7 @@ export function convertNode(clNode: any): ILightningApi.Node {
  * 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');
+  logger.debug(`Converting clightning nodes and channels to lnd graph format`, logger.tags.ln);
 
   let loggerTimer = new Date().getTime() / 1000;
   let channelProcessed = 0;
@@ -54,16 +164,17 @@ export async function convertAndmergeBidirectionalChannels(clChannels: any[]): P
       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 fullChannel = await buildFullChannel(clChannel, clChannelsDict[clChannel.short_channel_id]);
+      if (fullChannel !== null) {
+        consolidatedChannelList.push(fullChannel);
+        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}`);
+    if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+      logger.info(`Building complete channels from clightning output. Channels processed: ${channelProcessed + 1} of ${clChannels.length}`, logger.tags.ln);
       loggerTimer = new Date().getTime() / 1000;
     }
 
@@ -73,10 +184,13 @@ export async function convertAndmergeBidirectionalChannels(clChannels: any[]): P
   channelProcessed = 0;
   const keys = Object.keys(clChannelsDict);
   for (const short_channel_id of keys) {
-    consolidatedChannelList.push(await buildIncompleteChannel(clChannelsDict[short_channel_id]));
+    const incompleteChannel = await buildIncompleteChannel(clChannelsDict[short_channel_id]);
+    if (incompleteChannel !== null) {
+      consolidatedChannelList.push(incompleteChannel);
+    }
 
     const elapsedSeconds = Math.round((new Date().getTime() / 1000) - loggerTimer);
-    if (elapsedSeconds > 10) {
+    if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
       logger.info(`Building partial channels from clightning output. Channels processed: ${channelProcessed + 1} of ${keys.length}`);
       loggerTimer = new Date().getTime() / 1000;
     }
@@ -91,16 +205,19 @@ export async function convertAndmergeBidirectionalChannels(clChannels: any[]): P
  * 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> {
+async function buildFullChannel(clChannelA: any, clChannelB: any): Promise<ILightningApi.Channel | null> {
   const lastUpdate = Math.max(clChannelA.last_update ?? 0, clChannelB.last_update ?? 0);
 
   const tx = await FundingTxFetcher.$fetchChannelOpenTx(clChannelA.short_channel_id);
+  if (!tx) {
+    return null;
+  }
   const parts = clChannelA.short_channel_id.split('x');
   const outputIdx = parts[2];
 
   return {
     channel_id: Common.channelShortIdToIntegerId(clChannelA.short_channel_id),
-    capacity: clChannelA.satoshis,
+    capacity: (clChannelA.amount_msat / 1000).toString(),
     last_update: lastUpdate,
     node1_policy: convertPolicy(clChannelA),
     node2_policy: convertPolicy(clChannelB),
@@ -114,14 +231,17 @@ async function buildFullChannel(clChannelA: any, clChannelB: any): Promise<ILigh
  * 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> {
+async function buildIncompleteChannel(clChannel: any): Promise<ILightningApi.Channel | null> {
   const tx = await FundingTxFetcher.$fetchChannelOpenTx(clChannel.short_channel_id);
+  if (!tx) {
+    return null;
+  }
   const parts = clChannel.short_channel_id.split('x');
   const outputIdx = parts[2];
 
   return {
     channel_id: Common.channelShortIdToIntegerId(clChannel.short_channel_id),
-    capacity: clChannel.satoshis,
+    capacity: (clChannel.amount_msat / 1000).toString(),
     last_update: clChannel.last_update ?? 0,
     node1_policy: convertPolicy(clChannel),
     node2_policy: null,
@@ -137,8 +257,8 @@ async function buildIncompleteChannel(clChannel: any): Promise<ILightningApi.Cha
 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),
+    min_htlc: clChannel.htlc_minimum_msat.toString(),
+    max_htlc_msat: clChannel.htlc_maximum_msat.toString(),
     fee_base_msat: clChannel.base_fee_millisatoshi,
     fee_rate_milli_msat: clChannel.fee_per_millionth,
     disabled: !clChannel.active,

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

@@ -21,7 +21,7 @@ export namespace ILightningApi {
   export interface Channel {
     channel_id: string;
     chan_point: string;
-    last_update: number;
+    last_update: number | null;
     node1_pub: string;
     node2_pub: string;
     capacity: string;
@@ -36,11 +36,11 @@ export namespace ILightningApi {
     fee_rate_milli_msat: string;
     disabled: boolean;
     max_htlc_msat: string;
-    last_update: number;
+    last_update: number | null;
   }
 
   export interface Node {
-    last_update: number;
+    last_update: number | null;
     pub_key: string;
     alias: string;
     addresses: {
@@ -79,6 +79,7 @@ export namespace ILightningApi {
   }
 
   export interface Feature {
+    bit: number;
     name: string;
     is_required: boolean;
     is_known: boolean;

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

@@ -4,21 +4,29 @@ import * as fs from 'fs';
 import { AbstractLightningApi } from '../lightning-api-abstract-factory';
 import { ILightningApi } from '../lightning-api.interface';
 import config from '../../../config';
+import logger from '../../../logger';
 
 class LndApi implements AbstractLightningApi {
   axiosConfig: AxiosRequestConfig = {};
 
   constructor() {
-    if (config.LIGHTNING.ENABLED) {
+    if (!config.LIGHTNING.ENABLED) {
+      return;
+    }
+    try {
       this.axiosConfig = {
         headers: {
-          'Grpc-Metadata-macaroon': fs.readFileSync(config.LND.MACAROON_PATH).toString('hex')
+          'Grpc-Metadata-macaroon': fs.readFileSync(config.LND.MACAROON_PATH).toString('hex'),
         },
         httpsAgent: new Agent({
           ca: fs.readFileSync(config.LND.TLS_CERT_PATH)
         }),
-        timeout: 10000
+        timeout: config.LND.TIMEOUT
       };
+    } catch (e) {
+      config.LIGHTNING.ENABLED = false;
+      logger.updateNetwork();
+      logger.err(`Could not initialize LND Macaroon/TLS Cert. Disabling LIGHTNING. ` + (e instanceof Error ? e.message : e));
     }
   }
 
@@ -33,8 +41,23 @@ class LndApi implements AbstractLightningApi {
   }
 
   async $getNetworkGraph(): Promise<ILightningApi.NetworkGraph> {
-    return axios.get<ILightningApi.NetworkGraph>(config.LND.REST_API_URL + '/v1/graph', this.axiosConfig)
+    const graph = await axios.get<ILightningApi.NetworkGraph>(config.LND.REST_API_URL + '/v1/graph', this.axiosConfig)
       .then((response) => response.data);
+
+    for (const node of graph.nodes) {
+      const nodeFeatures: ILightningApi.Feature[] = [];
+      for (const bit in node.features) {        
+        nodeFeatures.push({
+          bit: parseInt(bit, 10),
+          name: node.features[bit].name,  
+          is_required: node.features[bit].is_required,
+          is_known: node.features[bit].is_known,
+        });
+      }
+      node.features = nodeFeatures;
+    }
+
+    return graph;
   }
 }
 

backend/src/api/liquid/icons.ts

@@ -2,7 +2,7 @@ import * as fs from 'fs';
 import logger from '../../logger';
 
 class Icons {
-  private static FILE_NAME = './icons.json';
+  private static FILE_NAME = '/elements/asset_registry_db/icons.json';
   private iconIds: string[] = [];
   private icons: { [assetId: string]: string; } = {};
 

backend/src/api/mempool-blocks.ts

@@ -1,19 +1,22 @@
+import { GbtGenerator, GbtResult, ThreadTransaction as RustThreadTransaction } from '../../rust-gbt';
 import logger from '../logger';
-import { MempoolBlock, TransactionExtended, TransactionStripped, MempoolBlockWithTransactions, MempoolBlockDelta } from '../mempool.interfaces';
-import { Common } from './common';
+import { MempoolBlock, MempoolTransactionExtended, TransactionStripped, MempoolBlockWithTransactions, MempoolBlockDelta, Ancestor, CompactThreadTransaction, EffectiveFeeStats } from '../mempool.interfaces';
+import { Common, OnlineFeeStatsCalculator } from './common';
 import config from '../config';
-import { StaticPool } from 'node-worker-threads-pool';
+import { Worker } from 'worker_threads';
 import path from 'path';
 
+const MAX_UINT32 = Math.pow(2, 32) - 1;
+
 class MempoolBlocks {
   private mempoolBlocks: MempoolBlockWithTransactions[] = [];
   private mempoolBlockDeltas: MempoolBlockDelta[] = [];
-  private makeTemplatesPool = new StaticPool({
-    size: 1,
-    task: path.resolve(__dirname, './tx-selection-worker.js'),
-  });
+  private txSelectionWorker: Worker | null = null;
+  private rustInitialized: boolean = false;
+  private rustGbtGenerator: GbtGenerator = new GbtGenerator();
 
-  constructor() {}
+  private nextUid: number = 1;
+  private uidMap: Map<number, string> = new Map(); // map short numerical uids to full txids
 
   public getMempoolBlocks(): MempoolBlock[] {
     return this.mempoolBlocks.map((block) => {
@@ -36,13 +39,11 @@ class MempoolBlocks {
     return this.mempoolBlockDeltas;
   }
 
-  public updateMempoolBlocks(memPool: { [txid: string]: TransactionExtended }): void {
+  public updateMempoolBlocks(memPool: { [txid: string]: MempoolTransactionExtended }, saveResults: boolean = false): MempoolBlockWithTransactions[] {
     const latestMempool = memPool;
-    const memPoolArray: TransactionExtended[] = [];
+    const memPoolArray: MempoolTransactionExtended[] = [];
     for (const i in latestMempool) {
-      if (latestMempool.hasOwnProperty(i)) {
-        memPoolArray.push(latestMempool[i]);
-      }
+      memPoolArray.push(latestMempool[i]);
     }
     const start = new Date().getTime();
 
@@ -52,17 +53,24 @@ class MempoolBlocks {
       tx.ancestors = [];
       tx.cpfpChecked = false;
       if (!tx.effectiveFeePerVsize) {
-        tx.effectiveFeePerVsize = tx.feePerVsize;
+        tx.effectiveFeePerVsize = tx.adjustedFeePerVsize;
       }
     });
 
     // First sort
-    memPoolArray.sort((a, b) => b.feePerVsize - a.feePerVsize);
+    memPoolArray.sort((a, b) => {
+      if (a.adjustedFeePerVsize === b.adjustedFeePerVsize) {
+        // tie-break by lexicographic txid order for stability
+        return a.txid < b.txid ? -1 : 1;
+      } else {
+        return b.adjustedFeePerVsize - a.adjustedFeePerVsize;
+      }
+    });
 
     // Loop through and traverse all ancestors and sum up all the sizes + fees
     // Pass down size + fee to all unconfirmed children
     let sizes = 0;
-    memPoolArray.forEach((tx, i) => {
+    memPoolArray.forEach((tx) => {
       sizes += tx.weight;
       if (sizes > 4000000 * 8) {
         return;
@@ -71,39 +79,87 @@ class MempoolBlocks {
     });
 
     // Final sort, by effective fee
-    memPoolArray.sort((a, b) => b.effectiveFeePerVsize - a.effectiveFeePerVsize);
+    memPoolArray.sort((a, b) => {
+      if (a.effectiveFeePerVsize === b.effectiveFeePerVsize) {
+        // tie-break by lexicographic txid order for stability
+        return a.txid < b.txid ? -1 : 1;
+      } else {
+        return b.effectiveFeePerVsize - a.effectiveFeePerVsize;
+      }
+    });
 
     const end = new Date().getTime();
     const time = end - start;
     logger.debug('Mempool blocks calculated in ' + time / 1000 + ' seconds');
 
-    const blocks = this.calculateMempoolBlocks(memPoolArray, this.mempoolBlocks);
-    const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, blocks);
+    const blocks = this.calculateMempoolBlocks(memPoolArray);
 
-    this.mempoolBlocks = blocks;
-    this.mempoolBlockDeltas = deltas;
+    if (saveResults) {
+      const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, blocks);
+      this.mempoolBlocks = blocks;
+      this.mempoolBlockDeltas = deltas;
+    }
+
+    return blocks;
   }
 
-  private calculateMempoolBlocks(transactionsSorted: TransactionExtended[], prevBlocks: MempoolBlockWithTransactions[]): MempoolBlockWithTransactions[] {
+  private calculateMempoolBlocks(transactionsSorted: MempoolTransactionExtended[]): MempoolBlockWithTransactions[] {
     const mempoolBlocks: MempoolBlockWithTransactions[] = [];
-    let blockWeight = 0;
+    let feeStatsCalculator: OnlineFeeStatsCalculator = new OnlineFeeStatsCalculator(config.MEMPOOL.BLOCK_WEIGHT_UNITS);
+    let onlineStats = false;
     let blockSize = 0;
-    let transactions: TransactionExtended[] = [];
-    transactionsSorted.forEach((tx) => {
+    let blockWeight = 0;
+    let blockVsize = 0;
+    let blockFees = 0;
+    const sizeLimit = (config.MEMPOOL.BLOCK_WEIGHT_UNITS / 4) * 1.2;
+    let transactionIds: string[] = [];
+    let transactions: MempoolTransactionExtended[] = [];
+    transactionsSorted.forEach((tx, index) => {
       if (blockWeight + tx.weight <= config.MEMPOOL.BLOCK_WEIGHT_UNITS
         || mempoolBlocks.length === config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT - 1) {
+        tx.position = {
+          block: mempoolBlocks.length,
+          vsize: blockVsize + (tx.vsize / 2),
+        };
         blockWeight += tx.weight;
+        blockVsize += tx.vsize;
         blockSize += tx.size;
-        transactions.push(tx);
+        blockFees += tx.fee;
+        if (blockVsize <= sizeLimit) {
+          transactions.push(tx);
+        }
+        transactionIds.push(tx.txid);
+        if (onlineStats) {
+          feeStatsCalculator.processNext(tx);
+        }
       } else {
-        mempoolBlocks.push(this.dataToMempoolBlocks(transactions, blockSize, blockWeight, mempoolBlocks.length));
+        mempoolBlocks.push(this.dataToMempoolBlocks(transactionIds, transactions, blockSize, blockWeight, blockFees));
+        blockVsize = 0;
+        tx.position = {
+          block: mempoolBlocks.length,
+          vsize: blockVsize + (tx.vsize / 2),
+        };
+
+        if (mempoolBlocks.length === config.MEMPOOL.MEMPOOL_BLOCKS_AMOUNT - 1) {
+          const stackWeight = transactionsSorted.slice(index).reduce((total, tx) => total + (tx.weight || 0), 0);
+          if (stackWeight > config.MEMPOOL.BLOCK_WEIGHT_UNITS) {
+            onlineStats = true;
+            feeStatsCalculator = new OnlineFeeStatsCalculator(stackWeight, 0.5, [10, 20, 30, 40, 50, 60, 70, 80, 90]);
+            feeStatsCalculator.processNext(tx);
+          }
+        }
+
+        blockVsize += tx.vsize;
         blockWeight = tx.weight;
         blockSize = tx.size;
+        blockFees = tx.fee;
+        transactionIds = [tx.txid];
         transactions = [tx];
       }
     });
     if (transactions.length) {
-      mempoolBlocks.push(this.dataToMempoolBlocks(transactions, blockSize, blockWeight, mempoolBlocks.length));
+      const feeStats = onlineStats ? feeStatsCalculator.getRawFeeStats() : undefined;
+      mempoolBlocks.push(this.dataToMempoolBlocks(transactionIds, transactions, blockSize, blockWeight, blockFees, feeStats));
     }
 
     return mempoolBlocks;
@@ -114,6 +170,7 @@ class MempoolBlocks {
     for (let i = 0; i < Math.max(mempoolBlocks.length, prevBlocks.length); i++) {
       let added: TransactionStripped[] = [];
       let removed: string[] = [];
+      const changed: { txid: string, rate: number | undefined }[] = [];
       if (mempoolBlocks[i] && !prevBlocks[i]) {
         added = mempoolBlocks[i].transactions;
       } else if (!mempoolBlocks[i] && prevBlocks[i]) {
@@ -122,7 +179,7 @@ class MempoolBlocks {
         const prevIds = {};
         const newIds = {};
         prevBlocks[i].transactions.forEach(tx => {
-          prevIds[tx.txid] = true;
+          prevIds[tx.txid] = tx;
         });
         mempoolBlocks[i].transactions.forEach(tx => {
           newIds[tx.txid] = true;
@@ -135,58 +192,435 @@ class MempoolBlocks {
         mempoolBlocks[i].transactions.forEach(tx => {
           if (!prevIds[tx.txid]) {
             added.push(tx);
+          } else if (tx.rate !== prevIds[tx.txid].rate) {
+            changed.push({ txid: tx.txid, rate: tx.rate });
           }
         });
       }
       mempoolBlockDeltas.push({
         added,
-        removed
+        removed,
+        changed,
       });
     }
     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);
+  public async $makeBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, saveResults: boolean = false): Promise<MempoolBlockWithTransactions[]> {
+    const start = Date.now();
 
-    // 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;
+    // reset mempool short ids
+    this.resetUids();
+    for (const tx of Object.values(newMempool)) {
+      this.setUid(tx);
+    }
+
+    // prepare a stripped down version of the mempool with only the minimum necessary data
+    // to reduce the overhead of passing this data to the worker thread
+    const strippedMempool: Map<number, CompactThreadTransaction> = new Map();
+    Object.values(newMempool).forEach(entry => {
+      if (entry.uid !== null && entry.uid !== undefined) {
+        const stripped = {
+          uid: entry.uid,
+          fee: entry.fee,
+          weight: (entry.adjustedVsize * 4),
+          sigops: entry.sigops,
+          feePerVsize: entry.adjustedFeePerVsize || entry.feePerVsize,
+          effectiveFeePerVsize: entry.effectiveFeePerVsize || entry.adjustedFeePerVsize || entry.feePerVsize,
+          inputs: entry.vin.map(v => this.getUid(newMempool[v.txid])).filter(uid => (uid !== null && uid !== undefined)) as number[],
+        };
+        strippedMempool.set(entry.uid, stripped);
       }
     });
 
-    this.mempoolBlocks = blocks;
-    this.mempoolBlockDeltas = deltas;
+    // (re)initialize tx selection worker thread
+    if (!this.txSelectionWorker) {
+      this.txSelectionWorker = new Worker(path.resolve(__dirname, './tx-selection-worker.js'));
+      // if the thread throws an unexpected error, or exits for any other reason,
+      // reset worker state so that it will be re-initialized on the next run
+      this.txSelectionWorker.once('error', () => {
+        this.txSelectionWorker = null;
+      });
+      this.txSelectionWorker.once('exit', () => {
+        this.txSelectionWorker = null;
+      });
+    }
+
+    // run the block construction algorithm in a separate thread, and wait for a result
+    let threadErrorListener;
+    try {
+      const workerResultPromise = new Promise<{ blocks: number[][], rates: Map<number, number>, clusters: Map<number, number[]> }>((resolve, reject) => {
+        threadErrorListener = reject;
+        this.txSelectionWorker?.once('message', (result): void => {
+          resolve(result);
+        });
+        this.txSelectionWorker?.once('error', reject);
+      });
+      this.txSelectionWorker.postMessage({ type: 'set', mempool: strippedMempool });
+      const { blocks, rates, clusters } = this.convertResultTxids(await workerResultPromise);
+
+      // clean up thread error listener
+      this.txSelectionWorker?.removeListener('error', threadErrorListener);
+
+      const processed = this.processBlockTemplates(newMempool, blocks, null, Object.entries(rates), Object.values(clusters), saveResults);
+
+      logger.debug(`makeBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
+
+      return processed;
+    } catch (e) {
+      logger.err('makeBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
+    }
+    return this.mempoolBlocks;
   }
 
-  private dataToMempoolBlocks(transactions: TransactionExtended[],
-    blockSize: number, blockWeight: number, blocksIndex: number): MempoolBlockWithTransactions {
-    let rangeLength = 4;
-    if (blocksIndex === 0) {
-      rangeLength = 8;
+  public async $updateBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[], saveResults: boolean = false): Promise<void> {
+    if (!this.txSelectionWorker) {
+      // need to reset the worker
+      await this.$makeBlockTemplates(newMempool, saveResults);
+      return;
     }
-    if (transactions.length > 4000) {
-      rangeLength = 6;
-    } else if (transactions.length > 10000) {
-      rangeLength = 8;
+
+    const start = Date.now();
+
+    for (const tx of Object.values(added)) {
+      this.setUid(tx, true);
+    }
+    const removedUids = removed.map(tx => this.getUid(tx)).filter(uid => (uid !== null && uid !== undefined)) as number[];
+    // prepare a stripped down version of the mempool with only the minimum necessary data
+    // to reduce the overhead of passing this data to the worker thread
+    const addedStripped: CompactThreadTransaction[] = added.filter(entry => (entry.uid !== null && entry.uid !== undefined)).map(entry => {
+      return {
+        uid: entry.uid || 0,
+        fee: entry.fee,
+        weight: (entry.adjustedVsize * 4),
+        sigops: entry.sigops,
+        feePerVsize: entry.adjustedFeePerVsize || entry.feePerVsize,
+        effectiveFeePerVsize: entry.effectiveFeePerVsize || entry.adjustedFeePerVsize || entry.feePerVsize,
+        inputs: entry.vin.map(v => this.getUid(newMempool[v.txid])).filter(uid => (uid !== null && uid !== undefined)) as number[],
+      };
+    });
+
+    // run the block construction algorithm in a separate thread, and wait for a result
+    let threadErrorListener;
+    try {
+      const workerResultPromise = new Promise<{ blocks: number[][], rates: Map<number, number>, clusters: Map<number, number[]> }>((resolve, reject) => {
+        threadErrorListener = reject;
+        this.txSelectionWorker?.once('message', (result): void => {
+          resolve(result);
+        });
+        this.txSelectionWorker?.once('error', reject);
+      });
+      this.txSelectionWorker.postMessage({ type: 'update', added: addedStripped, removed: removedUids });
+      const { blocks, rates, clusters } = this.convertResultTxids(await workerResultPromise);
+
+      this.removeUids(removedUids);
+
+      // clean up thread error listener
+      this.txSelectionWorker?.removeListener('error', threadErrorListener);
+
+      this.processBlockTemplates(newMempool, blocks, null, Object.entries(rates), Object.values(clusters), saveResults);
+      logger.debug(`updateBlockTemplates completed in ${(Date.now() - start) / 1000} seconds`);
+    } catch (e) {
+      logger.err('updateBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  private resetRustGbt(): void {
+    this.rustInitialized = false;
+    this.rustGbtGenerator = new GbtGenerator();
+  }
+
+  private async $rustMakeBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, saveResults: boolean = false): Promise<MempoolBlockWithTransactions[]> {
+    const start = Date.now();
+
+    // reset mempool short ids
+    if (saveResults) {
+      this.resetUids();
+    }
+    // set missing short ids
+    for (const tx of Object.values(newMempool)) {
+      this.setUid(tx, !saveResults);
+    }
+    // set short ids for transaction inputs
+    for (const tx of Object.values(newMempool)) {
+      tx.inputs = tx.vin.map(v => this.getUid(newMempool[v.txid])).filter(uid => (uid !== null && uid !== undefined)) as number[];
+    }
+
+    // run the block construction algorithm in a separate thread, and wait for a result
+    const rustGbt = saveResults ? this.rustGbtGenerator : new GbtGenerator();
+    try {
+      const { blocks, blockWeights, rates, clusters } = this.convertNapiResultTxids(
+        await rustGbt.make(Object.values(newMempool) as RustThreadTransaction[], this.nextUid),
+      );
+      if (saveResults) {
+        this.rustInitialized = true;
+      }
+      const processed = this.processBlockTemplates(newMempool, blocks, blockWeights, rates, clusters, saveResults);
+      logger.debug(`RUST makeBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
+      return processed;
+    } catch (e) {
+      logger.err('RUST makeBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
+      if (saveResults) {
+        this.resetRustGbt();
+      }
+    }
+    return this.mempoolBlocks;
+  }
+
+  public async $oneOffRustBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }): Promise<MempoolBlockWithTransactions[]> {
+    return this.$rustMakeBlockTemplates(newMempool, false);
+  }
+
+  public async $rustUpdateBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, mempoolSize: number, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[]): Promise<void> {
+    // GBT optimization requires that uids never get too sparse
+    // as a sanity check, we should also explicitly prevent uint32 uid overflow
+    if (this.nextUid + added.length >= Math.min(Math.max(262144, 2 * mempoolSize), MAX_UINT32)) {
+      this.resetRustGbt();
+    }
+    if (!this.rustInitialized) {
+      // need to reset the worker
+      await this.$rustMakeBlockTemplates(newMempool, true);
+      return;
+    }
+
+    const start = Date.now();
+    // set missing short ids
+    for (const tx of added) {
+      this.setUid(tx, true);
+    }
+    // set short ids for transaction inputs
+    for (const tx of added) {
+      tx.inputs = tx.vin.map(v => this.getUid(newMempool[v.txid])).filter(uid => (uid !== null && uid !== undefined)) as number[];
+    }
+    const removedUids = removed.map(tx => this.getUid(tx)).filter(uid => (uid !== null && uid !== undefined)) as number[];
+
+    // run the block construction algorithm in a separate thread, and wait for a result
+    try {
+      const { blocks, blockWeights, rates, clusters } = this.convertNapiResultTxids(
+        await this.rustGbtGenerator.update(
+          added as RustThreadTransaction[],
+          removedUids,
+          this.nextUid,
+        ),
+      );
+      const resultMempoolSize = blocks.reduce((total, block) => total + block.length, 0);
+      if (mempoolSize !== resultMempoolSize) {
+        throw new Error('GBT returned wrong number of transactions, cache is probably out of sync');
+      } else {
+        this.processBlockTemplates(newMempool, blocks, blockWeights, rates, clusters, true);
+      }
+      this.removeUids(removedUids);
+      logger.debug(`RUST updateBlockTemplates completed in ${(Date.now() - start)/1000} seconds`);
+    } catch (e) {
+      logger.err('RUST updateBlockTemplates failed. ' + (e instanceof Error ? e.message : e));
+      this.resetRustGbt();
+    }
+  }
+
+  private processBlockTemplates(mempool: { [txid: string]: MempoolTransactionExtended }, blocks: string[][], blockWeights: number[] | null, rates: [string, number][], clusters: string[][], saveResults): MempoolBlockWithTransactions[] {
+    for (const [txid, rate] of rates) {
+      if (txid in mempool) {
+        mempool[txid].effectiveFeePerVsize = rate;
+        mempool[txid].cpfpChecked = false;
+      }
+    }
+
+    const lastBlockIndex = blocks.length - 1;
+    let hasBlockStack = blocks.length >= 8;
+    let stackWeight;
+    let feeStatsCalculator: OnlineFeeStatsCalculator | void;
+    if (hasBlockStack) {
+      if (blockWeights && blockWeights[7] !== null) {
+        stackWeight = blockWeights[7];
+      } else {
+        stackWeight = blocks[lastBlockIndex].reduce((total, tx) => total + (mempool[tx]?.weight || 0), 0);
+      }
+      hasBlockStack = stackWeight > config.MEMPOOL.BLOCK_WEIGHT_UNITS;
+      feeStatsCalculator = new OnlineFeeStatsCalculator(stackWeight, 0.5, [10, 20, 30, 40, 50, 60, 70, 80, 90]);
+    }
+
+    for (const cluster of clusters) {
+      for (const memberTxid of cluster) {
+        const mempoolTx = mempool[memberTxid];
+        if (mempoolTx) {
+          const ancestors: Ancestor[] = [];
+          const descendants: Ancestor[] = [];
+          let matched = false;
+          cluster.forEach(txid => {
+            if (txid === memberTxid) {
+              matched = true;
+            } else {
+              const relative = {
+                txid: txid,
+                fee: mempool[txid].fee,
+                weight: (mempool[txid].adjustedVsize * 4),
+              };
+              if (matched) {
+                descendants.push(relative);
+                mempoolTx.lastBoosted = Math.max(mempoolTx.lastBoosted || 0, mempool[txid].firstSeen || 0);
+              } else {
+                ancestors.push(relative);
+              }
+            }
+          });
+          Object.assign(mempoolTx, {ancestors, descendants, bestDescendant: null, cpfpChecked: true});
+        }
+      }
+    }
+
+    const sizeLimit = (config.MEMPOOL.BLOCK_WEIGHT_UNITS / 4) * 1.2;
+    // update this thread's mempool with the results
+    let mempoolTx: MempoolTransactionExtended;
+    const mempoolBlocks: MempoolBlockWithTransactions[] = blocks.map((block, blockIndex) => {
+      let totalSize = 0;
+      let totalVsize = 0;
+      let totalWeight = 0;
+      let totalFees = 0;
+      const transactions: MempoolTransactionExtended[] = [];
+      for (const txid of block) {
+        if (txid) {
+          mempoolTx = mempool[txid];
+          // save position in projected blocks
+          mempoolTx.position = {
+            block: blockIndex,
+            vsize: totalVsize + (mempoolTx.vsize / 2),
+          };
+          if (!mempoolTx.cpfpChecked) {
+            if (mempoolTx.ancestors?.length) {
+              mempoolTx.ancestors = [];
+            }
+            if (mempoolTx.descendants?.length) {
+              mempoolTx.descendants = [];
+            }
+            mempoolTx.bestDescendant = null;
+            mempoolTx.cpfpChecked = true;
+          }
+
+          // online calculation of stack-of-blocks fee stats
+          if (hasBlockStack && blockIndex === lastBlockIndex && feeStatsCalculator) {
+            feeStatsCalculator.processNext(mempoolTx);
+          }
+
+          totalSize += mempoolTx.size;
+          totalVsize += mempoolTx.vsize;
+          totalWeight += mempoolTx.weight;
+          totalFees += mempoolTx.fee;
+
+          if (totalVsize <= sizeLimit) {
+            transactions.push(mempoolTx);
+          }
+        }
+      }
+      return this.dataToMempoolBlocks(
+        block,
+        transactions,
+        totalSize,
+        totalWeight,
+        totalFees,
+        (hasBlockStack && blockIndex === lastBlockIndex && feeStatsCalculator) ? feeStatsCalculator.getRawFeeStats() : undefined,
+      );
+    });
+
+    if (saveResults) {
+      const deltas = this.calculateMempoolDeltas(this.mempoolBlocks, mempoolBlocks);
+      this.mempoolBlocks = mempoolBlocks;
+      this.mempoolBlockDeltas = deltas;
+    }
+
+    return mempoolBlocks;
+  }
+
+  private dataToMempoolBlocks(transactionIds: string[], transactions: MempoolTransactionExtended[], totalSize: number, totalWeight: number, totalFees: number, feeStats?: EffectiveFeeStats ): MempoolBlockWithTransactions {
+    if (!feeStats) {
+      feeStats = Common.calcEffectiveFeeStatistics(transactions);
     }
     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),
+      blockSize: totalSize,
+      blockVSize: (totalWeight / 4), // fractional vsize to avoid rounding errors
+      nTx: transactionIds.length,
+      totalFees: totalFees,
+      medianFee: feeStats.medianFee, // Common.percentile(transactions.map((tx) => tx.effectiveFeePerVsize), config.MEMPOOL.RECOMMENDED_FEE_PERCENTILE),
+      feeRange: feeStats.feeRange, //Common.getFeesInRange(transactions, rangeLength),
+      transactionIds: transactionIds,
       transactions: transactions.map((tx) => Common.stripTransaction(tx)),
     };
   }
+
+  private resetUids(): void {
+    this.uidMap.clear();
+    this.nextUid = 1;
+  }
+
+  private setUid(tx: MempoolTransactionExtended, skipSet = false): number {
+    if (tx.uid === null || tx.uid === undefined || !skipSet) {
+      const uid = this.nextUid;
+      this.nextUid++;
+      this.uidMap.set(uid, tx.txid);
+      tx.uid = uid;
+      return uid;
+    } else {
+      return tx.uid;
+    }
+  }
+
+  private getUid(tx: MempoolTransactionExtended): number | void {
+    if (tx?.uid !== null && tx?.uid !== undefined && this.uidMap.has(tx.uid)) {
+      return tx.uid;
+    }
+  }
+
+  private removeUids(uids: number[]): void {
+    for (const uid of uids) {
+      this.uidMap.delete(uid);
+    }
+  }
+
+  private convertResultTxids({ blocks, rates, clusters }: { blocks: number[][], rates: Map<number, number>, clusters: Map<number, number[]>})
+    : { blocks: string[][], rates: { [root: string]: number }, clusters: { [root: string]: string[] }} {
+    const convertedBlocks: string[][] = blocks.map(block => block.map(uid => {
+      return this.uidMap.get(uid) || '';
+    }));
+    const convertedRates = {};
+    for (const rateUid of rates.keys()) {
+      const rateTxid = this.uidMap.get(rateUid);
+      if (rateTxid) {
+        convertedRates[rateTxid] = rates.get(rateUid);
+      }
+    }
+    const convertedClusters = {};
+    for (const rootUid of clusters.keys()) {
+      const rootTxid = this.uidMap.get(rootUid);
+      if (rootTxid) {
+        const members = clusters.get(rootUid)?.map(uid => {
+          return this.uidMap.get(uid);
+        });
+        convertedClusters[rootTxid] = members;
+      }
+    }
+    return { blocks: convertedBlocks, rates: convertedRates, clusters: convertedClusters } as { blocks: string[][], rates: { [root: string]: number }, clusters: { [root: string]: string[] }};
+  }
+
+  private convertNapiResultTxids({ blocks, blockWeights, rates, clusters }: GbtResult)
+    : { blocks: string[][], blockWeights: number[], rates: [string, number][], clusters: string[][] } {
+    const convertedBlocks: string[][] = blocks.map(block => block.map(uid => {
+      const txid = this.uidMap.get(uid);
+      if (txid !== undefined) {
+        return txid;
+      } else {
+        throw new Error('GBT returned a block containing a transaction with unknown uid');
+      }
+    }));
+    const convertedRates: [string, number][] = [];
+    for (const [rateUid, rate] of rates) {
+      const rateTxid = this.uidMap.get(rateUid) as string;
+      convertedRates.push([rateTxid, rate]);
+    }
+    const convertedClusters: string[][] = [];
+    for (const cluster of clusters) {
+      convertedClusters.push(cluster.map(uid => this.uidMap.get(uid)) as string[]);
+    }
+    return { blocks: convertedBlocks, blockWeights, rates: convertedRates, clusters: convertedClusters };
+  }
 }
 
 export default new MempoolBlocks();

backend/src/api/mempool.ts

@@ -1,6 +1,6 @@
 import config from '../config';
 import bitcoinApi from './bitcoin/bitcoin-api-factory';
-import { TransactionExtended, VbytesPerSecond } from '../mempool.interfaces';
+import { MempoolTransactionExtended, TransactionExtended, VbytesPerSecond } from '../mempool.interfaces';
 import logger from '../logger';
 import { Common } from './common';
 import transactionUtils from './transaction-utils';
@@ -11,17 +11,16 @@ 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 mempoolCache: { [txId: string]: MempoolTransactionExtended } = {};
+  private spendMap = new Map<string, MempoolTransactionExtended>();
   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 mempoolChangedCallback: ((newMempool: {[txId: string]: MempoolTransactionExtended; }, newTransactions: MempoolTransactionExtended[],
+    deletedTransactions: MempoolTransactionExtended[]) => void) | undefined;
+  private $asyncMempoolChangedCallback: ((newMempool: {[txId: string]: MempoolTransactionExtended; }, mempoolSize: number, newTransactions: MempoolTransactionExtended[],
+    deletedTransactions: MempoolTransactionExtended[]) => Promise<void>) | undefined;
 
   private txPerSecondArray: number[] = [];
   private txPerSecond: number = 0;
@@ -31,9 +30,14 @@ class Mempool {
   private mempoolProtection = 0;
   private latestTransactions: any[] = [];
 
+  private ESPLORA_MISSING_TX_WARNING_THRESHOLD = 100; 
+  private SAMPLE_TIME = 10000; // In ms
+  private timer = new Date().getTime();
+  private missingTxCount = 0;
+  private mainLoopTimeout: number = 120000;
+
   constructor() {
     setInterval(this.updateTxPerSecond.bind(this), 1000);
-    setInterval(this.deleteExpiredTransactions.bind(this), 20000);
   }
 
   /**
@@ -60,28 +64,43 @@ class Mempool {
     return this.latestTransactions;
   }
 
-  public setMempoolChangedCallback(fn: (newMempool: { [txId: string]: TransactionExtended; },
-    newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]) => void) {
+  public setMempoolChangedCallback(fn: (newMempool: { [txId: string]: MempoolTransactionExtended; },
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[]) => void): void {
     this.mempoolChangedCallback = fn;
   }
 
-  public setAsyncMempoolChangedCallback(fn: (newMempool: { [txId: string]: TransactionExtended; },
-    newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]) => Promise<void>) {
-    this.asyncMempoolChangedCallback = fn;
+  public setAsyncMempoolChangedCallback(fn: (newMempool: { [txId: string]: MempoolTransactionExtended; }, mempoolSize: number,
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[]) => Promise<void>): void {
+    this.$asyncMempoolChangedCallback = fn;
   }
 
-  public getMempool(): { [txid: string]: TransactionExtended } {
+  public getMempool(): { [txid: string]: MempoolTransactionExtended } {
     return this.mempoolCache;
   }
 
-  public setMempool(mempoolData: { [txId: string]: TransactionExtended }) {
+  public getSpendMap(): Map<string, MempoolTransactionExtended> {
+    return this.spendMap;
+  }
+
+  public async $setMempool(mempoolData: { [txId: string]: MempoolTransactionExtended }) {
     this.mempoolCache = mempoolData;
+    let count = 0;
+    for (const txid of Object.keys(this.mempoolCache)) {
+      if (!this.mempoolCache[txid].sigops || this.mempoolCache[txid].effectiveFeePerVsize == null) {
+        this.mempoolCache[txid] = transactionUtils.extendMempoolTransaction(this.mempoolCache[txid]);
+      }
+      if (this.mempoolCache[txid].order == null) {
+        this.mempoolCache[txid].order = transactionUtils.txidToOrdering(txid);
+      }
+      count++;
+    }
     if (this.mempoolChangedCallback) {
       this.mempoolChangedCallback(this.mempoolCache, [], []);
     }
-    if (this.asyncMempoolChangedCallback) {
-      this.asyncMempoolChangedCallback(this.mempoolCache, [], []);
+    if (this.$asyncMempoolChangedCallback) {
+      await this.$asyncMempoolChangedCallback(this.mempoolCache, count, [], []);
     }
+    this.addToSpendMap(Object.values(this.mempoolCache));
   }
 
   public async $updateMemPoolInfo() {
@@ -113,25 +132,41 @@ class Mempool {
     return txTimes;
   }
 
-  public async $updateMempool(): Promise<void> {
+  public async $updateMempool(transactions: string[]): Promise<void> {
     logger.debug(`Updating mempool...`);
+
+    // warn if this run stalls the main loop for more than 2 minutes
+    const timer = this.startTimer();
+
     const start = new Date().getTime();
     let hasChange: boolean = false;
     const currentMempoolSize = Object.keys(this.mempoolCache).length;
-    const transactions = await bitcoinApi.$getRawMempool();
+    this.updateTimerProgress(timer, 'got raw mempool');
     const diff = transactions.length - currentMempoolSize;
-    const newTransactions: TransactionExtended[] = [];
+    const newTransactions: MempoolTransactionExtended[] = [];
 
     this.mempoolCacheDelta = Math.abs(diff);
 
     if (!this.inSync) {
-      loadingIndicators.setProgress('mempool', Object.keys(this.mempoolCache).length / transactions.length * 100);
+      loadingIndicators.setProgress('mempool', currentMempoolSize / transactions.length * 100);
     }
 
+    // https://github.com/mempool/mempool/issues/3283
+    const logEsplora404 = (missingTxCount, threshold, time) => {
+      const log = `In the past ${time / 1000} seconds, esplora tx API replied ${missingTxCount} times with a 404 error code while updating nodejs backend mempool`;
+      if (missingTxCount >= threshold) {
+        logger.warn(log);
+      } else if (missingTxCount > 0) {
+        logger.debug(log);
+      }
+    };
+
+    let intervalTimer = Date.now();
     for (const txid of transactions) {
       if (!this.mempoolCache[txid]) {
         try {
-          const transaction = await transactionUtils.$getTransactionExtended(txid);
+          const transaction = await transactionUtils.$getMempoolTransactionExtended(txid, false, false, false);
+          this.updateTimerProgress(timer, 'fetched new transaction');
           this.mempoolCache[txid] = transaction;
           if (this.inSync) {
             this.txPerSecondArray.push(new Date().getTime());
@@ -142,16 +177,38 @@ class Mempool {
           }
           hasChange = true;
           newTransactions.push(transaction);
-        } catch (e) {
+        } catch (e: any) {
+          if (config.MEMPOOL.BACKEND === 'esplora' && e.response?.status === 404) {
+            this.missingTxCount++;
+          }
           logger.debug(`Error finding transaction '${txid}' in the mempool: ` + (e instanceof Error ? e.message : e));
         }
       }
 
-      if ((new Date().getTime()) - start > Mempool.WEBSOCKET_REFRESH_RATE_MS) {
-        break;
+      if (Date.now() - intervalTimer > 5_000) {
+        
+        if (this.inSync) {
+          // Break and restart mempool loop if we spend too much time processing
+          // new transactions that may lead to falling behind on block height
+          logger.debug('Breaking mempool loop because the 5s time limit exceeded.');
+          break;
+        } else {
+          const progress = (currentMempoolSize + newTransactions.length) / transactions.length * 100;
+          logger.debug(`Mempool is synchronizing. Processed ${newTransactions.length}/${diff} txs (${Math.round(progress)}%)`);
+          loadingIndicators.setProgress('mempool', progress);
+          intervalTimer = Date.now()
+        }
       }
     }
 
+    // Reset esplora 404 counter and log a warning if needed
+    const elapsedTime = new Date().getTime() - this.timer;
+    if (elapsedTime > this.SAMPLE_TIME) {
+      logEsplora404(this.missingTxCount, this.ESPLORA_MISSING_TX_WARNING_THRESHOLD, elapsedTime);
+      this.timer = new Date().getTime();
+      this.missingTxCount = 0;
+    }
+
     // Prevent mempool from clear on bitcoind restart by delaying the deletion
     if (this.mempoolProtection === 0
       && currentMempoolSize > 20000
@@ -166,7 +223,7 @@ class Mempool {
       }, 1000 * 60 * config.MEMPOOL.CLEAR_PROTECTION_MINUTES);
     }
 
-    const deletedTransactions: TransactionExtended[] = [];
+    const deletedTransactions: MempoolTransactionExtended[] = [];
 
     if (this.mempoolProtection !== 1) {
       this.mempoolProtection = 0;
@@ -174,45 +231,100 @@ class Mempool {
       const transactionsObject = {};
       transactions.forEach((txId) => transactionsObject[txId] = true);
 
-      // Flag transactions for lazy deletion
+      // Delete evicted transactions from mempool
       for (const tx in this.mempoolCache) {
-        if (!transactionsObject[tx] && !this.mempoolCache[tx].deleteAfter) {
+        if (!transactionsObject[tx]) {
           deletedTransactions.push(this.mempoolCache[tx]);
-          this.mempoolCache[tx].deleteAfter = new Date().getTime() + Mempool.LAZY_DELETE_AFTER_SECONDS * 1000;
         }
       }
+      for (const tx of deletedTransactions) {
+        delete this.mempoolCache[tx.txid];
+      }
     }
 
+    const newMempoolSize = currentMempoolSize + newTransactions.length - deletedTransactions.length;
     const newTransactionsStripped = newTransactions.map((tx) => Common.stripTransaction(tx));
     this.latestTransactions = newTransactionsStripped.concat(this.latestTransactions).slice(0, 6);
 
-    if (!this.inSync && transactions.length === Object.keys(this.mempoolCache).length) {
+    if (!this.inSync && transactions.length === newMempoolSize) {
       this.inSync = true;
       logger.notice('The mempool is now in sync!');
       loadingIndicators.setProgress('mempool', 100);
     }
 
-    this.mempoolCacheDelta = Math.abs(transactions.length - Object.keys(this.mempoolCache).length);
+    this.mempoolCacheDelta = Math.abs(transactions.length - newMempoolSize);
 
     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);
+    if (this.$asyncMempoolChangedCallback && (hasChange || deletedTransactions.length)) {
+      this.updateTimerProgress(timer, 'running async mempool callback');
+      await this.$asyncMempoolChangedCallback(this.mempoolCache, newMempoolSize, newTransactions, deletedTransactions);
+      this.updateTimerProgress(timer, 'completed async mempool callback');
     }
 
     const end = new Date().getTime();
     const time = end - start;
     logger.debug(`Mempool updated in ${time / 1000} seconds. New size: ${Object.keys(this.mempoolCache).length} (${diff > 0 ? '+' + diff : diff})`);
+
+    this.clearTimer(timer);
   }
 
-  public handleRbfTransactions(rbfTransactions: { [txid: string]: TransactionExtended; }) {
+  private startTimer() {
+    const state: any = {
+      start: Date.now(),
+      progress: 'begin $updateMempool',
+      timer: null,
+    };
+    state.timer = setTimeout(() => {
+      logger.err(`$updateMempool stalled at "${state.progress}"`);
+    }, this.mainLoopTimeout);
+    return state;
+  }
+
+  private updateTimerProgress(state, msg) {
+    state.progress = msg;
+  }
+
+  private clearTimer(state) {
+    if (state.timer) {
+      clearTimeout(state.timer);
+    }
+  }
+
+  public handleRbfTransactions(rbfTransactions: { [txid: string]: MempoolTransactionExtended[]; }): void {
     for (const rbfTransaction in rbfTransactions) {
-      if (this.mempoolCache[rbfTransaction]) {
+      if (this.mempoolCache[rbfTransaction] && rbfTransactions[rbfTransaction]?.length) {
         // Store replaced transactions
-        rbfCache.add(rbfTransaction, rbfTransactions[rbfTransaction].txid);
-        // Erase the replaced transactions from the local mempool
-        delete this.mempoolCache[rbfTransaction];
+        rbfCache.add(rbfTransactions[rbfTransaction], this.mempoolCache[rbfTransaction]);
+      }
+    }
+  }
+
+  public handleMinedRbfTransactions(rbfTransactions: { [txid: string]: { replaced: MempoolTransactionExtended[], replacedBy: TransactionExtended }}): void {
+    for (const rbfTransaction in rbfTransactions) {
+      if (rbfTransactions[rbfTransaction].replacedBy && rbfTransactions[rbfTransaction]?.replaced?.length) {
+        // Store replaced transactions
+        rbfCache.add(rbfTransactions[rbfTransaction].replaced, transactionUtils.extendMempoolTransaction(rbfTransactions[rbfTransaction].replacedBy));
+      }
+    }
+  }
+
+  public addToSpendMap(transactions: MempoolTransactionExtended[]): void {
+    for (const tx of transactions) {
+      for (const vin of tx.vin) {
+        this.spendMap.set(`${vin.txid}:${vin.vout}`, tx);
+      }
+    }
+  }
+
+  public removeFromSpendMap(transactions: TransactionExtended[]): void {
+    for (const tx of transactions) {
+      for (const vin of tx.vin) {
+        const key = `${vin.txid}:${vin.vout}`;
+        if (this.spendMap.get(key)?.txid === tx.txid) {
+          this.spendMap.delete(key);
+        }
       }
     }
   }
@@ -230,16 +342,6 @@ class Mempool {
     }
   }
 
-  private deleteExpiredTransactions() {
-    const now = new Date().getTime();
-    for (const tx in this.mempoolCache) {
-      const lazyDeleteAt = this.mempoolCache[tx].deleteAfter;
-      if (lazyDeleteAt && lazyDeleteAt < now) {
-        delete this.mempoolCache[tx];
-      }
-    }
-  }
-
   private $getMempoolInfo() {
     if (config.MEMPOOL.USE_SECOND_NODE_FOR_MINFEE) {
       return Promise.all([

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

@@ -1,13 +1,13 @@
 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";
+import PricesRepository from '../../repositories/PricesRepository';
 
 class MiningRoutes {
   public initRoutes(app: Application) {
@@ -26,15 +26,33 @@ class MiningRoutes {
       .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/predictions/:interval', this.$getHistoricalBlocksHealth)
       .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/audit/scores', this.$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)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'historical-price', this.$getHistoricalPrice)
     ;
   }
 
+  private async $getHistoricalPrice(req: Request, res: Response): Promise<void> {
+    try {
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      if (req.query.timestamp) {
+        res.status(200).send(await PricesRepository.$getNearestHistoricalPrice(
+          parseInt(<string>req.query.timestamp ?? 0, 10)
+        ));
+      } else {
+        res.status(200).send(await PricesRepository.$getHistoricalPrices());
+      }
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
   private async $getPool(req: Request, res: Response): Promise<void> {
     try {
       const stats = await mining.$getPoolStat(req.params.slug);
@@ -226,15 +244,15 @@ class MiningRoutes {
     }
   }
 
-  private async $getHistoricalBlockPrediction(req: Request, res: Response) {
+  private async $getHistoricalBlocksHealth(req: Request, res: Response) {
     try {
-      const blockPredictions = await mining.$getBlockPredictionsHistory(req.params.interval);
-      const blockCount = await BlocksAuditsRepository.$getPredictionsCount();
+      const blocksHealth = await mining.$getBlocksHealthHistory(req.params.interval);
+      const blockCount = await BlocksAuditsRepository.$getBlocksHealthCount();
       res.header('Pragma', 'public');
       res.header('Cache-control', 'public');
       res.header('X-total-count', blockCount.toString());
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
-      res.json(blockPredictions.map(prediction => [prediction.time, prediction.height, prediction.match_rate]));
+      res.json(blocksHealth.map(health => [health.time, health.height, health.match_rate]));
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
@@ -245,7 +263,7 @@ class MiningRoutes {
       const audit = await BlocksAuditsRepository.$getBlockAudit(req.params.hash);
 
       if (!audit) {
-        res.status(404).send(`This block has not been audited.`);
+        res.status(204).send(`This block has not been audited.`);
         return;
       }
 

backend/src/api/mining/mining.ts

@@ -11,18 +11,23 @@ import DifficultyAdjustmentsRepository from '../../repositories/DifficultyAdjust
 import config from '../../config';
 import BlocksAuditsRepository from '../../repositories/BlocksAuditsRepository';
 import PricesRepository from '../../repositories/PricesRepository';
+import { bitcoinCoreApi } from '../bitcoin/bitcoin-api-factory';
+import { IEsploraApi } from '../bitcoin/esplora-api.interface';
+import database from '../../database';
 
 class Mining {
-  blocksPriceIndexingRunning = false;
-
-  constructor() {
-  }
+  private blocksPriceIndexingRunning = false;
+  public lastHashrateIndexingDate: number | null = null;
+  public lastWeeklyHashrateIndexingDate: number | null = null;
+  
+  public reindexHashrateRequested = false;
+  public reindexDifficultyAdjustmentRequested = false;
 
   /**
-   * Get historical block predictions match rate
+   * Get historical blocks health
    */
-   public async $getBlockPredictionsHistory(interval: string | null = null): Promise<any> {
-    return await BlocksAuditsRepository.$getBlockPredictionsHistory(
+   public async $getBlocksHealthHistory(interval: string | null = null): Promise<any> {
+    return await BlocksAuditsRepository.$getBlocksHealthHistory(
       this.getTimeRange(interval),
       Common.getSqlInterval(interval)
     );
@@ -100,6 +105,8 @@ class Mining {
         rank: rank++,
         emptyBlocks: emptyBlocksCount.length > 0 ? emptyBlocksCount[0]['count'] : 0,
         slug: poolInfo.slug,
+        avgMatchRate: poolInfo.avgMatchRate !== null ? Math.round(100 * poolInfo.avgMatchRate) / 100 : null,
+        avgFeeDelta: poolInfo.avgFeeDelta,
       };
       poolsStats.push(poolStat);
     });
@@ -115,7 +122,7 @@ class Mining {
       poolsStatistics['lastEstimatedHashrate'] = await bitcoinClient.getNetworkHashPs(totalBlock24h);
     } catch (e) {
       poolsStatistics['lastEstimatedHashrate'] = 0;
-      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate');
+      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate', logger.tags.mining);
     }
 
     return poolsStatistics;
@@ -139,11 +146,14 @@ class Mining {
     const blockCount1w: number = await BlocksRepository.$blockCount(pool.id, '1w');
     const totalBlock1w: number = await BlocksRepository.$blockCount(null, '1w');
 
+    const avgHealth = await BlocksRepository.$getAvgBlockHealthPerPoolId(pool.id);    
+    const totalReward = await BlocksRepository.$getTotalRewardForPoolId(pool.id);    
+
     let currentEstimatedHashrate = 0;
     try {
       currentEstimatedHashrate = await bitcoinClient.getNetworkHashPs(totalBlock24h);
     } catch (e) {
-      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate');
+      logger.debug('Bitcoin Core is not available, using zeroed value for current hashrate', logger.tags.mining);
     }
 
     return {
@@ -160,6 +170,8 @@ class Mining {
       },
       estimatedHashrate: currentEstimatedHashrate * (blockCount24h / totalBlock24h),
       reportedHashrate: null,
+      avgBlockHealth: avgHealth,
+      totalReward: totalReward,
     };
   }
 
@@ -171,25 +183,26 @@ class Mining {
   }
 
   /**
-   * [INDEXING] Generate weekly mining pool hashrate history
+   * 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)
+    // * this.lastWeeklyHashrateIndexingDate is set to null (node backend restart, reorg)
     // * we started a new week (around Monday midnight)
-    const runIndexing = lastestRunDate === 0 || now.getUTCDay() === 1 && lastestRunDate !== now.getUTCDate();
+    const runIndexing = this.lastWeeklyHashrateIndexingDate === null ||
+      now.getUTCDay() === 1 && this.lastWeeklyHashrateIndexingDate !== now.getUTCDate();
     if (!runIndexing) {
+      logger.debug(`Pool hashrate history indexing is up to date, nothing to do`, logger.tags.mining);
       return;
     }
 
     try {
       const oldestConsecutiveBlockTimestamp = 1000 * (await BlocksRepository.$getOldestConsecutiveBlock()).timestamp;
 
-      const genesisBlock = await bitcoinClient.getBlock(await bitcoinClient.getBlockHash(0));
-      const genesisTimestamp = genesisBlock.time * 1000;
+      const genesisBlock: IEsploraApi.Block = await bitcoinCoreApi.$getBlock(await bitcoinClient.getBlockHash(0));
+      const genesisTimestamp = genesisBlock.timestamp * 1000;
 
       const indexedTimestamp = await HashratesRepository.$getWeeklyHashrateTimestamps();
       const hashrates: any[] = [];
@@ -205,7 +218,7 @@ class Mining {
       const startedAt = new Date().getTime() / 1000;
       let timer = new Date().getTime() / 1000;
 
-      logger.debug(`Indexing weekly mining pool hashrate`);
+      logger.debug(`Indexing weekly mining pool hashrate`, logger.tags.mining);
       loadingIndicators.setProgress('weekly-hashrate-indexing', 0);
 
       while (toTimestamp > genesisTimestamp && toTimestamp > oldestConsecutiveBlockTimestamp) {
@@ -242,7 +255,7 @@ class Mining {
             });
           }
 
-          newlyIndexed += hashrates.length;
+          newlyIndexed += hashrates.length / Math.max(1, pools.length);
           await HashratesRepository.$saveHashrates(hashrates);
           hashrates.length = 0;
         }
@@ -253,7 +266,7 @@ class Mining {
           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`);
+          logger.debug(`Getting weekly pool hashrate for ${formattedDate} | ~${weeksPerSeconds.toFixed(2)} weeks/sec | total: ~${totalIndexed}/${Math.round(totalWeekIndexed)} (${progress}%) | elapsed: ${runningFor} seconds`, logger.tags.mining);
           timer = new Date().getTime() / 1000;
           indexedThisRun = 0;
           loadingIndicators.setProgress('weekly-hashrate-indexing', progress, false);
@@ -263,36 +276,44 @@ class Mining {
         ++indexedThisRun;
         ++totalIndexed;
       }
-      await HashratesRepository.$setLatestRun('last_weekly_hashrates_indexing', new Date().getUTCDate());
+      this.lastWeeklyHashrateIndexingDate = new Date().getUTCDate();
       if (newlyIndexed > 0) {
-        logger.notice(`Weekly mining pools hashrates indexing completed: indexed ${newlyIndexed}`);
+        logger.info(`Weekly mining pools hashrates indexing completed: indexed ${newlyIndexed} weeks`, logger.tags.mining);
       } else {
-        logger.debug(`Weekly mining pools hashrates indexing completed: indexed ${newlyIndexed}`);
+        logger.debug(`Weekly mining pools hashrates indexing completed: indexed ${newlyIndexed} weeks`, logger.tags.mining);
       }
       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)}`);
+      logger.err(`Weekly mining pools hashrates indexing failed. Trying again in 10 seconds. Reason: ${(e instanceof Error ? e.message : e)}`, logger.tags.mining);
       throw e;
     }
   }
 
   /**
-   * [INDEXING] Generate daily hashrate data
+   * Generate daily hashrate data
    */
   public async $generateNetworkHashrateHistory(): Promise<void> {
+    // If a re-index was requested, truncate first
+    if (this.reindexHashrateRequested === true) {
+      logger.notice(`hashrates will now be re-indexed`);
+      await database.query(`TRUNCATE hashrates`);
+      this.lastHashrateIndexingDate = 0;
+      this.reindexHashrateRequested = false;
+    }
+
     // We only run this once a day around midnight
-    const latestRunDate = await HashratesRepository.$getLatestRun('last_hashrates_indexing');
-    const now = new Date().getUTCDate();
-    if (now === latestRunDate) {
+    const today = new Date().getUTCDate();
+    if (today === this.lastHashrateIndexingDate) {
+      logger.debug(`Network hashrate history indexing is up to date, nothing to do`, logger.tags.mining);
       return;
     }
 
     const oldestConsecutiveBlockTimestamp = 1000 * (await BlocksRepository.$getOldestConsecutiveBlock()).timestamp;
 
     try {
-      const genesisBlock = await bitcoinClient.getBlock(await bitcoinClient.getBlockHash(0));
-      const genesisTimestamp = genesisBlock.time * 1000;
+      const genesisBlock: IEsploraApi.Block = await bitcoinCoreApi.$getBlock(await bitcoinClient.getBlockHash(0));
+      const genesisTimestamp = genesisBlock.timestamp * 1000;
       const indexedTimestamp = (await HashratesRepository.$getRawNetworkDailyHashrate(null)).map(hashrate => hashrate.timestamp);
       const lastMidnight = this.getDateMidnight(new Date());
       let toTimestamp = Math.round(lastMidnight.getTime());
@@ -305,7 +326,7 @@ class Mining {
       const startedAt = new Date().getTime() / 1000;
       let timer = new Date().getTime() / 1000;
 
-      logger.debug(`Indexing daily network hashrate`);
+      logger.debug(`Indexing daily network hashrate`, logger.tags.mining);
       loadingIndicators.setProgress('daily-hashrate-indexing', 0);
 
       while (toTimestamp > genesisTimestamp && toTimestamp > oldestConsecutiveBlockTimestamp) {
@@ -343,7 +364,7 @@ class Mining {
           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`);
+          logger.debug(`Getting network daily hashrate for ${formattedDate} | ~${daysPerSeconds.toFixed(2)} days/sec | total: ~${totalIndexed}/${Math.round(totalDayIndexed)} (${progress}%) | elapsed: ${runningFor} seconds`, logger.tags.mining);
           timer = new Date().getTime() / 1000;
           indexedThisRun = 0;
           loadingIndicators.setProgress('daily-hashrate-indexing', progress);
@@ -368,16 +389,16 @@ class Mining {
       newlyIndexed += hashrates.length;
       await HashratesRepository.$saveHashrates(hashrates);
 
-      await HashratesRepository.$setLatestRun('last_hashrates_indexing', new Date().getUTCDate());
+      this.lastHashrateIndexingDate = new Date().getUTCDate();
       if (newlyIndexed > 0) {
-        logger.notice(`Daily network hashrate indexing completed: indexed ${newlyIndexed} days`);
+        logger.info(`Daily network hashrate indexing completed: indexed ${newlyIndexed} days`, logger.tags.mining);
       } else {
-        logger.debug(`Daily network hashrate indexing completed: indexed ${newlyIndexed} days`);
+        logger.debug(`Daily network hashrate indexing completed: indexed ${newlyIndexed} days`, logger.tags.mining);
       }
       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)}`);
+      logger.err(`Daily network hashrate indexing failed. Trying again later. Reason: ${(e instanceof Error ? e.message : e)}`, logger.tags.mining);
       throw e;
     }
   }
@@ -386,6 +407,13 @@ class Mining {
    * Index difficulty adjustments
    */
   public async $indexDifficultyAdjustments(): Promise<void> {
+    // If a re-index was requested, truncate first
+    if (this.reindexDifficultyAdjustmentRequested === true) {
+      logger.notice(`difficulty_adjustments will now be re-indexed`);
+      await database.query(`TRUNCATE difficulty_adjustments`);
+      this.reindexDifficultyAdjustmentRequested = false;
+    }
+
     const indexedHeightsArray = await DifficultyAdjustmentsRepository.$getAdjustmentsHeights();
     const indexedHeights = {};
     for (const height of indexedHeightsArray) {
@@ -393,13 +421,13 @@ class Mining {
     }
 
     const blocks: any = await BlocksRepository.$getBlocksDifficulty();
-    const genesisBlock = await bitcoinClient.getBlock(await bitcoinClient.getBlockHash(0));
+    const genesisBlock: IEsploraApi.Block = await bitcoinCoreApi.$getBlock(await bitcoinClient.getBlockHash(0));
     let currentDifficulty = genesisBlock.difficulty;
     let totalIndexed = 0;
 
     if (config.MEMPOOL.INDEXING_BLOCKS_AMOUNT === -1 && indexedHeights[0] !== true) {
       await DifficultyAdjustmentsRepository.$saveAdjustments({
-        time: genesisBlock.time,
+        time: genesisBlock.timestamp,
         height: 0,
         difficulty: currentDifficulty,
         adjustment: 0.0,
@@ -443,32 +471,32 @@ class Mining {
       const elapsedSeconds = Math.max(1, Math.round((new Date().getTime() / 1000) - timer));
       if (elapsedSeconds > 5) {
         const progress = Math.round(totalBlockChecked / blocks.length * 100);
-        logger.info(`Indexing difficulty adjustment at block #${block.height} | Progress: ${progress}%`);
+        logger.debug(`Indexing difficulty adjustment at block #${block.height} | Progress: ${progress}%`, logger.tags.mining);
         timer = new Date().getTime() / 1000;
       }
     }
 
     if (totalIndexed > 0) {
-      logger.notice(`Indexed ${totalIndexed} difficulty adjustments`);
+      logger.info(`Indexed ${totalIndexed} difficulty adjustments`, logger.tags.mining);
     } else {
-      logger.debug(`Indexed ${totalIndexed} difficulty adjustments`);
+      logger.debug(`Indexed ${totalIndexed} difficulty adjustments`, logger.tags.mining);
     }
   }
 
   /**
    * Create a link between blocks and the latest price at when they were mined
    */
-  public async $indexBlockPrices() {
+  public async $indexBlockPrices(): Promise<void> {
     if (this.blocksPriceIndexingRunning === true) {
       return;
     }
     this.blocksPriceIndexingRunning = true;
 
+    let totalInserted = 0;
     try {
       const prices: any[] = await PricesRepository.$getPricesTimesAndId();    
       const blocksWithoutPrices: any[] = await BlocksRepository.$getBlocksWithoutPrice();
 
-      let totalInserted = 0;
       const blocksPrices: BlockPrice[] = [];
 
       for (const block of blocksWithoutPrices) {
@@ -496,7 +524,7 @@ class Mining {
           if (blocksWithoutPrices.length > 200000) {
             logStr += ` | Progress ${Math.round(totalInserted / blocksWithoutPrices.length * 100)}%`;
           }
-          logger.debug(logStr);
+          logger.debug(logStr, logger.tags.mining);
           await BlocksRepository.$saveBlockPrices(blocksPrices);
           blocksPrices.length = 0;
         }
@@ -508,17 +536,60 @@ class Mining {
         if (blocksWithoutPrices.length > 200000) {
           logStr += ` | Progress ${Math.round(totalInserted / blocksWithoutPrices.length * 100)}%`;
         }
-        logger.debug(logStr);
+        logger.debug(logStr, logger.tags.mining);
         await BlocksRepository.$saveBlockPrices(blocksPrices);
       }
     } catch (e) {
       this.blocksPriceIndexingRunning = false;
-      throw e;
+      logger.err(`Cannot index block prices. ${e}`);
+    }
+
+    if (totalInserted > 0) {
+      logger.info(`Indexing blocks prices completed. Indexed ${totalInserted}`, logger.tags.mining);
+    } else {
+      logger.debug(`Indexing blocks prices completed. Indexed 0.`, logger.tags.mining);
     }
 
     this.blocksPriceIndexingRunning = false;
   }
 
+  /**
+   * Index core coinstatsindex
+   */
+  public async $indexCoinStatsIndex(): Promise<void> {
+    let timer = new Date().getTime() / 1000;
+    let totalIndexed = 0;
+
+    const blockchainInfo = await bitcoinClient.getBlockchainInfo();
+    let currentBlockHeight = blockchainInfo.blocks;
+
+    while (currentBlockHeight > 0) {
+      const indexedBlocks = await BlocksRepository.$getBlocksMissingCoinStatsIndex(
+        currentBlockHeight, currentBlockHeight - 10000);
+        
+      for (const block of indexedBlocks) {
+        const txoutset = await bitcoinClient.getTxoutSetinfo('none', block.height);
+        await BlocksRepository.$updateCoinStatsIndexData(block.hash, txoutset.txouts,
+          Math.round(txoutset.block_info.prevout_spent * 100000000));        
+        ++totalIndexed;
+
+        const elapsedSeconds = Math.max(1, new Date().getTime() / 1000 - timer);
+        if (elapsedSeconds > 5) {
+          logger.info(`Indexing coinstatsindex data for block #${block.height}. Indexed ${totalIndexed} blocks.`, logger.tags.mining);
+          timer = new Date().getTime() / 1000;
+        }
+      }
+
+      currentBlockHeight -= 10000;
+    }
+
+    if (totalIndexed > 0) {
+      logger.info(`Indexing missing coinstatsindex data completed. Indexed ${totalIndexed}`, logger.tags.mining);
+    } else {
+      logger.debug(`Indexing missing coinstatsindex data completed. Indexed 0.`, logger.tags.mining);
+    }
+  }
+
   private getDateMidnight(date: Date): Date {
     date.setUTCHours(0);
     date.setUTCMinutes(0);
@@ -530,6 +601,7 @@ class Mining {
 
   private getTimeRange(interval: string | null, scale = 1): number {
     switch (interval) {
+      case '4y': return 43200 * scale; // 12h
       case '3y': return 43200 * scale; // 12h
       case '2y': return 28800 * scale; // 8h
       case '1y': return 28800 * scale; // 8h

backend/src/api/pools-parser.ts

@@ -1,289 +1,179 @@
 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;
-}
+import PoolsRepository from '../repositories/PoolsRepository';
+import { PoolTag } from '../mempool.interfaces';
+import diskCache from './disk-cache';
+import mining from './mining/mining';
 
 class PoolsParser {
   miningPools: any[] = [];
   unknownPool: any = {
+    'id': 0,
     'name': 'Unknown',
     'link': 'https://learnmeabitcoin.com/technical/coinbase-transaction',
     'regexes': '[]',
     'addresses': '[]',
     'slug': 'unknown'
   };
-  slugWarnFlag = false;
+  private uniqueLogs: string[] = [];
+
+  private uniqueLog(loggerFunction: any, msg: string): void {
+    if (this.uniqueLogs.includes(msg)) {
+      return;
+    }
+    this.uniqueLogs.push(msg);
+    loggerFunction(msg);
+  }
+
+  public setMiningPools(pools): void {
+    for (const pool of pools) {
+      pool.regexes = pool.tags;
+      pool.slug = pool.name.replace(/[^a-z0-9]/gi, '').toLowerCase();
+      delete(pool.tags);
+    }
+    this.miningPools = pools;
+  }
 
   /**
-   * Parse the pools.json file, consolidate the data and dump it into the database
+   * Populate our db with updated mining pool definition
+   * @param pools 
    */
-  public async migratePoolsJson(poolsJson: object): Promise<void> {
-    if (['mainnet', 'testnet', 'signet'].includes(config.MEMPOOL.NETWORK) === false) {
-      return;
-    }
+  public async migratePoolsJson(): Promise<void> {
+    // We also need to wipe the backend cache to make sure we don't serve blocks with
+    // the wrong mining pool (usually happen with unknown blocks)
+    diskCache.setIgnoreBlocksCache();
 
-    // First we save every entries without paying attention to pool duplication
-    const poolsDuplicated: Pool[] = [];
+    await this.$insertUnknownPool();
 
-    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);
+    for (const pool of this.miningPools) {
+      if (!pool.id) {
+        logger.info(`Mining pool ${pool.name} has no unique 'id' defined. Skipping.`);
+        continue;
       }
-    }
-    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 });
+      const poolDB = await PoolsRepository.$getPoolByUniqueId(pool.id, false);
+      if (!poolDB) {
+        // New mining pool
+        const slug = pool.name.replace(/[^a-z0-9]/gi, '').toLowerCase();
+        logger.debug(`Inserting new mining pool ${pool.name}`);
+        await PoolsRepository.$insertNewMiningPool(pool, slug);
+        await this.$deleteUnknownBlocks();
       } 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 (poolDB.name !== pool.name) {
+          // Pool has been renamed
+          const newSlug = pool.name.replace(/[^a-z0-9]/gi, '').toLowerCase();
+          logger.warn(`Renaming ${poolDB.name} mining pool to ${pool.name}. Slug has been updated. Maybe you want to make a redirection from 'https://mempool.space/mining/pool/${poolDB.slug}' to 'https://mempool.space/mining/pool/${newSlug}`);
+          await PoolsRepository.$renameMiningPool(poolDB.id, newSlug, pool.name);
+        }
+        if (poolDB.link !== pool.link) {
+          // Pool link has changed
+          logger.debug(`Updating link for ${pool.name} mining pool`);
+          await PoolsRepository.$updateMiningPoolLink(poolDB.id, pool.link);
+        }
+        if (JSON.stringify(pool.addresses) !== poolDB.addresses ||
+          JSON.stringify(pool.regexes) !== poolDB.regexes) {
+          // Pool addresses changed or coinbase tags changed
+          logger.notice(`Updating addresses and/or coinbase tags for ${pool.name} mining pool.`);
+          await PoolsRepository.$updateMiningPoolTags(poolDB.id, pool.addresses, pool.regexes);
+          await this.$deleteBlocksForPool(poolDB);
         }
       }
-
-      if (slug === undefined) {
-        // Only keep alphanumerical
-        slug = poolNames[i].replace(/[^a-z0-9]/gi, '').toLowerCase();
-        logger.warn(`No slug found for '${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() {
+  public async $insertUnknownPool(): Promise<void> {
+    if (!config.DATABASE.ENABLED) {
+      return;
+    }
+
     try {
       const [rows]: any[] = await DB.query({ sql: 'SELECT name from pools where name="Unknown"', timeout: 120000 });
       if (rows.length === 0) {
         await DB.query({
-          sql: `INSERT INTO pools(name, link, regexes, addresses, slug)
-          VALUES("Unknown", "https://learnmeabitcoin.com/technical/coinbase-transaction", "[]", "[]", "unknown");
+          sql: `INSERT INTO pools(name, link, regexes, addresses, slug, unique_id)
+          VALUES("${this.unknownPool.name}", "${this.unknownPool.link}", "[]", "[]", "${this.unknownPool.slug}", 0);
         `});
       } else {
         await DB.query(`UPDATE pools
-          SET name='Unknown', link='https://learnmeabitcoin.com/technical/coinbase-transaction',
+          SET name='${this.unknownPool.name}', link='${this.unknownPool.link}',
           regexes='[]', addresses='[]',
-          slug='unknown'
-          WHERE name='Unknown'
+          slug='${this.unknownPool.slug}',
+          unique_id=0
+          WHERE slug='${this.unknownPool.slug}'
         `);
       }
     } catch (e) {
-      logger.err('Unable to insert "Unknown" mining pool');
+      logger.err(`Unable to insert or update "Unknown" mining pool. Reason: ${e instanceof Error ? e.message : e}`);
     }
   }
 
   /**
-   * Delete blocks which needs to be reindexed
+   * Delete indexed blocks for an updated mining pool
+   * 
+   * @param pool 
    */
-   private async $deleteBlocskToReindex(finalPoolDataUpdate: any[]) {
-    if (config.MEMPOOL.AUTOMATIC_BLOCK_REINDEXING === false) {
-      return;
+  private async $deleteBlocksForPool(pool: PoolTag): Promise<void> {
+    // Get oldest blocks mined by the pool and assume pools-v2.json updates only concern most recent years
+    // Ignore early days of Bitcoin as there were no mining pool yet
+    const [oldestPoolBlock]: any[] = await DB.query(`
+      SELECT height
+      FROM blocks
+      WHERE pool_id = ?
+      ORDER BY height
+      LIMIT 1`,
+      [pool.id]
+    );
+
+    let firstKnownBlockPool = 130635; // https://mempool.space/block/0000000000000a067d94ff753eec72830f1205ad3a4c216a08a80c832e551a52
+    if (config.MEMPOOL.NETWORK === 'testnet') {
+      firstKnownBlockPool = 21106; // https://mempool.space/testnet/block/0000000070b701a5b6a1b965f6a38e0472e70b2bb31b973e4638dec400877581
+    } else if (config.MEMPOOL.NETWORK === 'signet' || config.MEMPOOL.NETWORK === 'regtest') {
+      firstKnownBlockPool = 0;
     }
 
-    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 oldestBlockHeight = oldestPoolBlock.length ?? 0 > 0 ? oldestPoolBlock[0].height : firstKnownBlockPool;
     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`);
+    this.uniqueLog(logger.notice, `Deleting blocks with unknown mining pool from height ${oldestBlockHeight} for re-indexing`);
+    await DB.query(`
+      DELETE FROM blocks
+      WHERE pool_id = ? AND height >= ${oldestBlockHeight}`,
+      [unknownPool[0].id]
+    );
+    logger.notice(`Deleting blocks from ${pool.name} mining pool for re-indexing`);
+    await DB.query(`
+      DELETE FROM blocks
+      WHERE pool_id = ?`,
+      [pool.id]
+    );
 
-    logger.notice('Truncating hashrates for future re-indexing');
-    await DB.query(`DELETE FROM hashrates`);
+    // Re-index hashrates and difficulty adjustments later
+    mining.reindexHashrateRequested = true;
+    mining.reindexDifficultyAdjustmentRequested = true;
+  }
+
+  private async $deleteUnknownBlocks(): Promise<void> {
+    let firstKnownBlockPool = 130635; // https://mempool.space/block/0000000000000a067d94ff753eec72830f1205ad3a4c216a08a80c832e551a52
+    if (config.MEMPOOL.NETWORK === 'testnet') {
+      firstKnownBlockPool = 21106; // https://mempool.space/testnet/block/0000000070b701a5b6a1b965f6a38e0472e70b2bb31b973e4638dec400877581
+    } else if (config.MEMPOOL.NETWORK === 'signet' || config.MEMPOOL.NETWORK === 'regtest') {
+      firstKnownBlockPool = 0;
+    }
+
+    const [unknownPool] = await DB.query(`SELECT id from pools where slug = "unknown"`);
+    this.uniqueLog(logger.notice, `Deleting blocks with unknown mining pool from height ${firstKnownBlockPool} for re-indexing`);
+    await DB.query(`
+      DELETE FROM blocks
+      WHERE pool_id = ? AND height >= ${firstKnownBlockPool}`,
+      [unknownPool[0].id]
+    );
+
+    // Re-index hashrates and difficulty adjustments later
+    mining.reindexHashrateRequested = true;
+    mining.reindexDifficultyAdjustmentRequested = true;
   }
 }
 

backend/src/api/rbf-cache.ts

@@ -1,33 +1,390 @@
-export interface CachedRbf {
+import logger from "../logger";
+import { MempoolTransactionExtended, TransactionStripped } from "../mempool.interfaces";
+import bitcoinApi from './bitcoin/bitcoin-api-factory';
+import { Common } from "./common";
+
+interface RbfTransaction extends TransactionStripped {
+  rbf?: boolean;
+  mined?: boolean;
+  fullRbf?: boolean;
+}
+
+interface RbfTree {
+  tx: RbfTransaction;
+  time: number;
+  interval?: number;
+  mined?: boolean;
+  fullRbf: boolean;
+  replaces: RbfTree[];
+}
+
+export interface ReplacementInfo {
+  mined: boolean;
+  fullRbf: boolean;
   txid: string;
-  expires: Date;
+  oldFee: number;
+  oldVsize: number;
+  newFee: number;
+  newVsize: number;
 }
 
 class RbfCache {
-  private cache: { [txid: string]: CachedRbf; } = {};
+  private replacedBy: Map<string, string> = new Map();
+  private replaces: Map<string, string[]> = new Map();
+  private rbfTrees: Map<string, RbfTree> = new Map(); // sequences of consecutive replacements
+  private dirtyTrees: Set<string> = new Set();
+  private treeMap: Map<string, string> = new Map(); // map of txids to sequence ids
+  private txs: Map<string, MempoolTransactionExtended> = new Map();
+  private expiring: Map<string, number> = new Map();
 
   constructor() {
-    setInterval(this.cleanup.bind(this), 1000 * 60 * 60);
+    setInterval(this.cleanup.bind(this), 1000 * 60 * 10);
   }
 
-  public add(replacedTxId: string, newTxId: string): void {
-    this.cache[replacedTxId] = {
-      expires: new Date(Date.now() + 1000 * 604800), // 1 week
-      txid: newTxId,
+  public add(replaced: MempoolTransactionExtended[], newTxExtended: MempoolTransactionExtended): void {
+    if (!newTxExtended || !replaced?.length || this.txs.has(newTxExtended.txid)) {
+      return;
+    }
+
+    const newTx = Common.stripTransaction(newTxExtended) as RbfTransaction;
+    const newTime = newTxExtended.firstSeen || (Date.now() / 1000);
+    newTx.rbf = newTxExtended.vin.some((v) => v.sequence < 0xfffffffe);
+    this.txs.set(newTx.txid, newTxExtended);
+
+    // maintain rbf trees
+    let txFullRbf = false;
+    let treeFullRbf = false;
+    const replacedTrees: RbfTree[] = [];
+    for (const replacedTxExtended of replaced) {
+      const replacedTx = Common.stripTransaction(replacedTxExtended) as RbfTransaction;
+      replacedTx.rbf = replacedTxExtended.vin.some((v) => v.sequence < 0xfffffffe);
+      if (!replacedTx.rbf) {
+        txFullRbf = true;
+      }
+      this.replacedBy.set(replacedTx.txid, newTx.txid);
+      if (this.treeMap.has(replacedTx.txid)) {
+        const treeId = this.treeMap.get(replacedTx.txid);
+        if (treeId) {
+          const tree = this.rbfTrees.get(treeId);
+          this.rbfTrees.delete(treeId);
+          if (tree) {
+            tree.interval = newTime - tree?.time;
+            replacedTrees.push(tree);
+            treeFullRbf = treeFullRbf || tree.fullRbf || !tree.tx.rbf;
+          }
+        }
+      } else {
+        const replacedTime = replacedTxExtended.firstSeen || (Date.now() / 1000);
+        replacedTrees.push({
+          tx: replacedTx,
+          time: replacedTime,
+          interval: newTime - replacedTime,
+          fullRbf: !replacedTx.rbf,
+          replaces: [],
+        });
+        treeFullRbf = treeFullRbf || !replacedTx.rbf;
+        this.txs.set(replacedTx.txid, replacedTxExtended);
+      }
+    }
+    newTx.fullRbf = txFullRbf;
+    const treeId = replacedTrees[0].tx.txid;
+    const newTree = {
+      tx: newTx,
+      time: newTime,
+      fullRbf: treeFullRbf,
+      replaces: replacedTrees
     };
+    this.rbfTrees.set(treeId, newTree);
+    this.updateTreeMap(treeId, newTree);
+    this.replaces.set(newTx.txid, replacedTrees.map(tree => tree.tx.txid));
+    this.dirtyTrees.add(treeId);
   }
 
-  public get(txId: string): CachedRbf | undefined {
-    return this.cache[txId];
+  public getReplacedBy(txId: string): string | undefined {
+    return this.replacedBy.get(txId);
+  }
+
+  public getReplaces(txId: string): string[] | undefined {
+    return this.replaces.get(txId);
+  }
+
+  public getTx(txId: string): MempoolTransactionExtended | undefined {
+    return this.txs.get(txId);
+  }
+
+  public getRbfTree(txId: string): RbfTree | void {
+    return this.rbfTrees.get(this.treeMap.get(txId) || '');
+  }
+
+  // get a paginated list of RbfTrees
+  // ordered by most recent replacement time
+  public getRbfTrees(onlyFullRbf: boolean, after?: string): RbfTree[] {
+    const limit = 25;
+    const trees: RbfTree[] = [];
+    const used = new Set<string>();
+    const replacements: string[][] = Array.from(this.replacedBy).reverse();
+    const afterTree = after ? this.treeMap.get(after) : null;
+    let ready = !afterTree;
+    for (let i = 0; i < replacements.length && trees.length <= limit - 1; i++) {
+      const txid = replacements[i][1];
+      const treeId = this.treeMap.get(txid) || '';
+      if (treeId === afterTree) {
+        ready = true;
+      } else if (ready) {
+        if (!used.has(treeId)) {
+          const tree = this.rbfTrees.get(treeId);
+          used.add(treeId);
+          if (tree && (!onlyFullRbf || tree.fullRbf)) {
+            trees.push(tree);
+          }
+        }
+      }
+    }
+    return trees;
+  }
+
+  // get map of rbf trees that have been updated since the last call
+  public getRbfChanges(): { trees: {[id: string]: RbfTree }, map: { [txid: string]: string }} {
+    const changes: { trees: {[id: string]: RbfTree }, map: { [txid: string]: string }} = {
+      trees: {},
+      map: {},
+    };
+    this.dirtyTrees.forEach(id => {
+      const tree = this.rbfTrees.get(id);
+      if (tree) {
+        changes.trees[id] = tree;
+        this.getTransactionsInTree(tree).forEach(tx => {
+          changes.map[tx.txid] = id;
+        });
+      }
+    });
+    this.dirtyTrees = new Set();
+    return changes;
+  }
+
+  public mined(txid): void {
+    if (!this.txs.has(txid)) {
+      return;
+    }
+    const treeId = this.treeMap.get(txid);
+    if (treeId && this.rbfTrees.has(treeId)) {
+      const tree = this.rbfTrees.get(treeId);
+      if (tree) {
+        this.setTreeMined(tree, txid);
+        tree.mined = true;
+        this.dirtyTrees.add(treeId);
+      }
+    }
+    this.evict(txid);
+  }
+
+  // flag a transaction as removed from the mempool
+  public evict(txid: string, fast: boolean = false): void {
+    if (this.txs.has(txid) && (fast || !this.expiring.has(txid))) {
+      this.expiring.set(txid, fast ? Date.now() + (1000 * 60 * 10) : Date.now() + (1000 * 86400)); // 24 hours
+    }
+  }
+
+  // is the transaction involved in a full rbf replacement?
+  public isFullRbf(txid: string): boolean {
+    const treeId = this.treeMap.get(txid);
+    if (!treeId) {
+      return false;
+    }
+    const tree = this.rbfTrees.get(treeId);
+    if (!tree) {
+      return false;
+    }
+    return tree?.fullRbf;
   }
 
   private cleanup(): void {
-    const currentDate = new Date();
-    for (const c in this.cache) {
-      if (this.cache[c].expires < currentDate) {
-        delete this.cache[c];
+    const now = Date.now();
+    for (const txid of this.expiring.keys()) {
+      if ((this.expiring.get(txid) || 0) < now) {
+        this.expiring.delete(txid);
+        this.remove(txid);
       }
     }
+    logger.debug(`rbf cache contains ${this.txs.size} txs, ${this.expiring.size} due to expire`);
+  }
+
+  // remove a transaction & all previous versions from the cache
+  private remove(txid): void {
+    // don't remove a transaction if a newer version remains in the mempool
+    if (!this.replacedBy.has(txid)) {
+      const replaces = this.replaces.get(txid);
+      this.replaces.delete(txid);
+      this.treeMap.delete(txid);
+      this.txs.delete(txid);
+      this.expiring.delete(txid);
+      for (const tx of (replaces || [])) {
+        // recursively remove prior versions from the cache
+        this.replacedBy.delete(tx);
+        // if this is the id of a tree, remove that too
+        if (this.treeMap.get(tx) === tx) {
+          this.rbfTrees.delete(tx);
+        }
+        this.remove(tx);
+      }
+    }
+  }
+
+  private updateTreeMap(newId: string, tree: RbfTree): void {
+    this.treeMap.set(tree.tx.txid, newId);
+    tree.replaces.forEach(subtree => {
+      this.updateTreeMap(newId, subtree);
+    });
+  }
+
+  private getTransactionsInTree(tree: RbfTree, txs: RbfTransaction[] = []): RbfTransaction[] {
+    txs.push(tree.tx);
+    tree.replaces.forEach(subtree => {
+      this.getTransactionsInTree(subtree, txs);
+    });
+    return txs;
+  }
+
+  private setTreeMined(tree: RbfTree, txid: string): void {
+    if (tree.tx.txid === txid) {
+      tree.tx.mined = true;
+    } else {
+      tree.replaces.forEach(subtree => {
+        this.setTreeMined(subtree, txid);
+      });
+    }
+  }
+
+  public dump(): any {
+    const trees = Array.from(this.rbfTrees.values()).map((tree: RbfTree) => { return this.exportTree(tree); });
+
+    return {
+      txs: Array.from(this.txs.entries()),
+      trees,
+      expiring: Array.from(this.expiring.entries()),
+    };
+  }
+
+  public async load({ txs, trees, expiring }): Promise<void> {
+    txs.forEach(txEntry => {
+      this.txs.set(txEntry[0], txEntry[1]);
+    });
+    for (const deflatedTree of trees) {
+      await this.importTree(deflatedTree.root, deflatedTree.root, deflatedTree, this.txs);
+    }
+    expiring.forEach(expiringEntry => {
+      if (this.txs.has(expiringEntry[0])) {
+        this.expiring.set(expiringEntry[0], new Date(expiringEntry[1]).getTime());
+      }
+    });
+    this.cleanup();
+  }
+
+  exportTree(tree: RbfTree, deflated: any = null) {
+    if (!deflated) {
+      deflated = {
+        root: tree.tx.txid,
+      };
+    }
+    deflated[tree.tx.txid] = {
+      tx: tree.tx.txid,
+      txMined: tree.tx.mined,
+      time: tree.time,
+      interval: tree.interval,
+      mined: tree.mined,
+      fullRbf: tree.fullRbf,
+      replaces: tree.replaces.map(child => child.tx.txid),
+    };
+    tree.replaces.forEach(child => {
+      this.exportTree(child, deflated);
+    });
+    return deflated;
+  }
+
+  async importTree(root, txid, deflated, txs: Map<string, MempoolTransactionExtended>, mined: boolean = false): Promise<RbfTree | void> {
+    const treeInfo = deflated[txid];
+    const replaces: RbfTree[] = [];
+
+    // check if any transactions in this tree have already been confirmed
+    mined = mined || treeInfo.mined;
+    let exists = mined;
+    if (!mined) {
+      try {
+        const apiTx = await bitcoinApi.$getRawTransaction(txid);
+        if (apiTx) {
+          exists = true;
+        }
+        if (apiTx?.status?.confirmed) {
+          mined = true;
+          treeInfo.txMined = true;
+          this.evict(txid, true);
+        }
+      } catch (e) {
+        // most transactions do not exist
+      }
+    }
+
+    // if the root tx is not in the mempool or the blockchain
+    // evict this tree as soon as possible
+    if (root === txid && !exists) {
+      this.evict(txid, true);
+    }
+
+    // recursively reconstruct child trees
+    for (const childId of treeInfo.replaces) {
+      const replaced = await this.importTree(root, childId, deflated, txs, mined);
+      if (replaced) {
+        this.replacedBy.set(replaced.tx.txid, txid);
+        replaces.push(replaced);
+        if (replaced.mined) {
+          mined = true;
+        }
+      }
+    }
+    this.replaces.set(txid, replaces.map(t => t.tx.txid));
+
+    const tx = txs.get(txid);
+    if (!tx) {
+      return;
+    }
+    const strippedTx = Common.stripTransaction(tx) as RbfTransaction;
+    strippedTx.rbf = tx.vin.some((v) => v.sequence < 0xfffffffe);
+    strippedTx.mined = treeInfo.txMined;
+    const tree = {
+      tx: strippedTx,
+      time: treeInfo.time,
+      interval: treeInfo.interval,
+      mined: mined,
+      fullRbf: treeInfo.fullRbf,
+      replaces,
+    };
+    this.treeMap.set(txid, root);
+    if (root === txid) {
+      this.rbfTrees.set(root, tree);
+      this.dirtyTrees.add(root);
+    }
+    return tree;
+  }
+
+  public getLatestRbfSummary(): ReplacementInfo[] {
+    const rbfList = this.getRbfTrees(false);
+    return rbfList.slice(0, 6).map(rbfTree => {
+      let oldFee = 0;
+      let oldVsize = 0;
+      for (const replaced of rbfTree.replaces) {
+        oldFee += replaced.tx.fee;
+        oldVsize += replaced.tx.vsize;
+      }
+      return {
+        txid: rbfTree.tx.txid,
+        mined: !!rbfTree.tx.mined,
+        fullRbf: !!rbfTree.tx.fullRbf,
+        oldFee,
+        oldVsize,
+        newFee: rbfTree.tx.fee,
+        newVsize: rbfTree.tx.vsize,
+      };
+    });
   }
 }
 

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

@@ -211,7 +211,7 @@ class StatisticsApi {
       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() \
+      ${interval === 'all' ? '' : `WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`} \
       GROUP BY UNIX_TIMESTAMP(added) DIV ${div} \
       ORDER BY statistics.added DESC;`;
   }
@@ -259,7 +259,7 @@ class StatisticsApi {
       vsize_1800,
       vsize_2000 \
       FROM statistics \
-      WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW() \
+      ${interval === 'all' ? '' : `WHERE added BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`} \
       GROUP BY UNIX_TIMESTAMP(added) DIV ${div} \
       ORDER BY statistics.added DESC;`;
   }
@@ -375,6 +375,28 @@ class StatisticsApi {
     }
   }
 
+  public async $list4Y(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDays(43200, '4 YEAR'); // 12h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$list4Y() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  public async $listAll(): Promise<OptimizedStatistic[]> {
+    try {
+      const query = this.getQueryForDays(43200, 'all'); // 12h interval
+      const [rows] = await DB.query({ sql: query, timeout: this.queryTimeout });
+      return this.mapStatisticToOptimizedStatistic(rows as Statistic[]);
+    } catch (e) {
+      logger.err('$listAll() error' + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
   private mapStatisticToOptimizedStatistic(statistic: Statistic[]): OptimizedStatistic[] {
     return statistic.map((s) => {
       return {

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

@@ -14,10 +14,12 @@ class StatisticsRoutes {
       .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.$getStatisticsByTime.bind(this, '3y'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/4y', this.$getStatisticsByTime.bind(this, '4y'))
+      .get(config.MEMPOOL.API_URL_PREFIX + 'statistics/all', this.$getStatisticsByTime.bind(this, 'all'))
     ;
   }
 
-  private async $getStatisticsByTime(time: '2h' | '24h' | '1w' | '1m' | '3m' | '6m' | '1y' | '2y' | '3y', req: Request, res: Response) {
+  private async $getStatisticsByTime(time: '2h' | '24h' | '1w' | '1m' | '3m' | '6m' | '1y' | '2y' | '3y' | '4y' | 'all', req: Request, res: Response) {
     res.header('Pragma', 'public');
     res.header('Cache-control', 'public');
     res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
@@ -25,10 +27,6 @@ class StatisticsRoutes {
     try {
       let result;
       switch (time as string) {
-        case '2h':
-          result = await statisticsApi.$list2H();
-          res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
-          break;
         case '24h':
           result = await statisticsApi.$list24H();
           res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
@@ -54,8 +52,16 @@ class StatisticsRoutes {
         case '3y':
           result = await statisticsApi.$list3Y();
           break;
+        case '4y':
+          result = await statisticsApi.$list4Y();
+          break;
+        case 'all':
+          result = await statisticsApi.$listAll();
+          break;
         default:
           result = await statisticsApi.$list2H();
+          res.setHeader('Expires', new Date(Date.now() + 1000 * 30).toUTCString());
+          break;
       }
       res.json(result);
     } catch (e) {

backend/src/api/transaction-utils.ts

@@ -1,8 +1,8 @@
-import bitcoinApi from './bitcoin/bitcoin-api-factory';
-import { TransactionExtended, TransactionMinerInfo } from '../mempool.interfaces';
+import { TransactionExtended, MempoolTransactionExtended, TransactionMinerInfo } from '../mempool.interfaces';
 import { IEsploraApi } from './bitcoin/esplora-api.interface';
-import config from '../config';
 import { Common } from './common';
+import bitcoinApi, { bitcoinCoreApi } from './bitcoin/bitcoin-api-factory';
+import * as bitcoinjs from 'bitcoinjs-lib';
 
 class TransactionUtils {
   constructor() { }
@@ -15,15 +15,42 @@ class TransactionUtils {
       vout: tx.vout
         .map((vout) => ({
           scriptpubkey_address: vout.scriptpubkey_address,
+          scriptpubkey_asm: vout.scriptpubkey_asm,
           value: vout.value
         }))
         .filter((vout) => vout.value)
     };
   }
 
-  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);
+  /**
+   * @param txId
+   * @param addPrevouts
+   * @param lazyPrevouts
+   * @param forceCore - See https://github.com/mempool/mempool/issues/2904
+   */
+  public async $getTransactionExtended(txId: string, addPrevouts = false, lazyPrevouts = false, forceCore = false, addMempoolData = false): Promise<TransactionExtended> {
+    let transaction: IEsploraApi.Transaction;
+    if (forceCore === true) {
+      transaction  = await bitcoinCoreApi.$getRawTransaction(txId, true);
+    } else {
+      transaction  = await bitcoinApi.$getRawTransaction(txId, false, addPrevouts, lazyPrevouts);
+    }
+
+    if (Common.isLiquid()) {
+      if (!isFinite(Number(transaction.fee))) {
+        transaction.fee = Object.values(transaction.fee || {}).reduce((total, output) => total + output, 0);
+      }
+    }
+
+    if (addMempoolData || !transaction?.status?.confirmed) {
+      return this.extendMempoolTransaction(transaction);
+    } else {
+      return this.extendTransaction(transaction);
+    }
+  }
+
+  public async $getMempoolTransactionExtended(txId: string, addPrevouts = false, lazyPrevouts = false, forceCore = false): Promise<MempoolTransactionExtended> {
+    return (await this.$getTransactionExtended(txId, addPrevouts, lazyPrevouts, forceCore, true)) as MempoolTransactionExtended;
   }
 
   private extendTransaction(transaction: IEsploraApi.Transaction): TransactionExtended {
@@ -32,15 +59,37 @@ class TransactionUtils {
       // @ts-ignore
       return transaction;
     }
-    const feePerVbytes = Math.max(Common.isLiquid() ? 0.1 : 1,
-      (transaction.fee || 0) / (transaction.weight / 4));
+    const feePerVbytes = (transaction.fee || 0) / (transaction.weight / 4);
     const transactionExtended: TransactionExtended = Object.assign({
       vsize: Math.round(transaction.weight / 4),
       feePerVsize: feePerVbytes,
       effectiveFeePerVsize: feePerVbytes,
     }, transaction);
-    if (!transaction.status.confirmed) {
-      transactionExtended.firstSeen = Math.round((new Date().getTime() / 1000));
+    if (!transaction?.status?.confirmed && !transactionExtended.firstSeen) {
+      transactionExtended.firstSeen = Math.round((Date.now() / 1000));
+    }
+    return transactionExtended;
+  }
+
+  public extendMempoolTransaction(transaction: IEsploraApi.Transaction): MempoolTransactionExtended {
+    const vsize = Math.ceil(transaction.weight / 4);
+    const fractionalVsize = (transaction.weight / 4);
+    const sigops = !Common.isLiquid() ? this.countSigops(transaction) : 0;
+    // https://github.com/bitcoin/bitcoin/blob/e9262ea32a6e1d364fb7974844fadc36f931f8c6/src/policy/policy.cpp#L295-L298
+    const adjustedVsize = Math.max(fractionalVsize, sigops *  5); // adjusted vsize = Max(weight, sigops * bytes_per_sigop) / witness_scale_factor
+    const feePerVbytes = (transaction.fee || 0) / fractionalVsize;
+    const adjustedFeePerVsize = (transaction.fee || 0) / adjustedVsize;
+    const transactionExtended: MempoolTransactionExtended = Object.assign(transaction, {
+      order: this.txidToOrdering(transaction.txid),
+      vsize: Math.round(transaction.weight / 4),
+      adjustedVsize,
+      sigops,
+      feePerVsize: feePerVbytes,
+      adjustedFeePerVsize: adjustedFeePerVsize,
+      effectiveFeePerVsize: adjustedFeePerVsize,
+    });
+    if (!transactionExtended?.status?.confirmed && !transactionExtended.firstSeen) {
+      transactionExtended.firstSeen = Math.round((Date.now() / 1000));
     }
     return transactionExtended;
   }
@@ -52,6 +101,75 @@ class TransactionUtils {
     }
     return str;
   }
+
+  public countScriptSigops(script: string, isRawScript: boolean = false, witness: boolean = false): number {
+    let sigops = 0;
+    // count OP_CHECKSIG and OP_CHECKSIGVERIFY
+    sigops += (script.match(/OP_CHECKSIG/g)?.length || 0);
+
+    // count OP_CHECKMULTISIG and OP_CHECKMULTISIGVERIFY
+    if (isRawScript) {
+      // in scriptPubKey or scriptSig, always worth 20
+      sigops += 20 * (script.match(/OP_CHECKMULTISIG/g)?.length || 0);
+    } else {
+      // in redeem scripts and witnesses, worth N if preceded by OP_N, 20 otherwise
+      const matches = script.matchAll(/(?:OP_(\d+))? OP_CHECKMULTISIG/g);
+      for (const match of matches) {
+        const n = parseInt(match[1]);
+        if (Number.isInteger(n)) {
+          sigops += n;
+        } else {
+          sigops += 20;
+        }
+      }
+    }
+
+    return witness ? sigops : (sigops * 4);
+  }
+
+  public countSigops(transaction: IEsploraApi.Transaction): number {
+    let sigops = 0;
+
+    for (const input of transaction.vin) {
+      if (input.scriptsig_asm) {
+        sigops += this.countScriptSigops(input.scriptsig_asm, true);
+      }
+      if (input.prevout) {
+        switch (true) {
+          case input.prevout.scriptpubkey_type === 'p2sh' && input.witness?.length === 2 && input.scriptsig && input.scriptsig.startsWith('160014'):
+          case input.prevout.scriptpubkey_type === 'v0_p2wpkh':
+            sigops += 1;
+            break;
+
+          case input.prevout?.scriptpubkey_type === 'p2sh' && input.witness?.length && input.scriptsig && input.scriptsig.startsWith('220020'):
+          case input.prevout.scriptpubkey_type === 'v0_p2wsh':
+            if (input.witness?.length) {
+              sigops += this.countScriptSigops(bitcoinjs.script.toASM(Buffer.from(input.witness[input.witness.length - 1], 'hex')), false, true);
+            }
+            break;
+        }
+      }
+    }
+
+    for (const output of transaction.vout) {
+      if (output.scriptpubkey_asm) {
+        sigops += this.countScriptSigops(output.scriptpubkey_asm, true);
+      }
+    }
+
+    return sigops;
+  }
+
+  // returns the most significant 4 bytes of the txid as an integer
+  public txidToOrdering(txid: string): number {
+    return parseInt(
+      txid.substr(62, 2) +
+        txid.substr(60, 2) +
+        txid.substr(58, 2) +
+        txid.substr(56, 2),
+      16
+    );
+  }
 }
 
 export default new TransactionUtils();

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

@@ -1,17 +1,29 @@
 import config from '../config';
 import logger from '../logger';
-import { TransactionExtended, MempoolBlockWithTransactions, AuditTransaction } from '../mempool.interfaces';
+import { CompactThreadTransaction, AuditTransaction } from '../mempool.interfaces';
 import { PairingHeap } from '../utils/pairing-heap';
-import { Common } from './common';
 import { parentPort } from 'worker_threads';
 
+let mempool: Map<number, CompactThreadTransaction> = new Map();
+
 if (parentPort) {
-  parentPort.on('message', (params: { mempool: { [txid: string]: TransactionExtended }, blockLimit: number, weightLimit: number | null, condenseRest: boolean}) => {
-    const { mempool, blocks } = makeBlockTemplates(params);
+  parentPort.on('message', (params) => {
+    if (params.type === 'set') {
+      mempool = params.mempool;
+    } else if (params.type === 'update') {
+      params.added.forEach(tx => {
+        mempool.set(tx.uid, tx);
+      });
+      params.removed.forEach(uid => {
+        mempool.delete(uid);
+      });
+    }
+    
+    const { blocks, rates, clusters } = makeBlockTemplates(mempool);
 
     // return the result to main thread.
     if (parentPort) {
-     parentPort.postMessage({ mempool, blocks });
+      parentPort.postMessage({ blocks, rates, clusters });
     }
   });
 }
@@ -19,47 +31,37 @@ if (parentPort) {
 /*
 * 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[] } {
+function makeBlockTemplates(mempool: Map<number, CompactThreadTransaction>)
+  : { blocks: number[][], rates: Map<number, number>, clusters: Map<number, number[]> } {
   const start = Date.now();
-  const auditPool: { [txid: string]: AuditTransaction } = {};
+  const auditPool: Map<number, AuditTransaction> = new Map();
   const mempoolArray: AuditTransaction[] = [];
-  const restOfArray: TransactionExtended[] = [];
+  const cpfpClusters: Map<number, number[]> = new Map();
   
-  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;
-    }
+  mempool.forEach(tx => {
+    tx.dirty = false;
     // initializing everything up front helps V8 optimize property access later
-    auditPool[tx.txid] = {
-      txid: tx.txid,
+    auditPool.set(tx.uid, {
+      uid: tx.uid,
       fee: tx.fee,
-      size: tx.size,
       weight: tx.weight,
       feePerVsize: tx.feePerVsize,
-      vin: tx.vin,
+      effectiveFeePerVsize: tx.feePerVsize,
+      sigops: tx.sigops,
+      inputs: tx.inputs || [],
       relativesSet: false,
-      ancestorMap: new Map<string, AuditTransaction>(),
+      ancestorMap: new Map<number, AuditTransaction>(),
       children: new Set<AuditTransaction>(),
       ancestorFee: 0,
       ancestorWeight: 0,
+      ancestorSigops: 0,
       score: 0,
       used: false,
       modified: false,
       modifiedNode: null,
-    };
-    mempoolArray.push(auditPool[tx.txid]);
+    });
+    mempoolArray.push(auditPool.get(tx.uid) as AuditTransaction);
   });
 
   // Build relatives graph & calculate ancestor scores
@@ -70,19 +72,33 @@ function makeBlockTemplates({ mempool, blockLimit, weightLimit, condenseRest }:
   }
 
   // Sort by descending ancestor score
-  mempoolArray.sort((a, b) => (b.score || 0) - (a.score || 0));
+  mempoolArray.sort((a, b) => {
+    if (b.score === a.score) {
+      // tie-break by uid for stability
+      return a.uid < b.uid ? -1 : 1;
+    } else {
+      return (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[] = [];
+  const blocks: number[][] = [];
   let blockWeight = 4000;
-  let blockSize = 0;
+  let blockSigops = 0;
   let transactions: AuditTransaction[] = [];
-  const modified: PairingHeap<AuditTransaction> = new PairingHeap((a, b): boolean => (a.score || 0) > (b.score || 0));
+  const modified: PairingHeap<AuditTransaction> = new PairingHeap((a, b): boolean => {
+    if (a.score === b.score) {
+      // tie-break by uid for stability
+      return a.uid > b.uid;
+    } else {
+      return (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)) {
+  while ((top < mempoolArray.length || !modified.isEmpty())) {
     // skip invalid transactions
     while (top < mempoolArray.length && (mempoolArray[top].used || mempoolArray[top].modified)) {
       top++;
@@ -105,38 +121,36 @@ function makeBlockTemplates({ mempool, blockLimit, weightLimit, condenseRest }:
 
     if (nextTx && !nextTx?.used) {
       // Check if the package fits into this block
-      if (blockWeight + nextTx.ancestorWeight < config.MEMPOOL.BLOCK_WEIGHT_UNITS) {
+      if (blocks.length >= 7 || ((blockWeight + nextTx.ancestorWeight < config.MEMPOOL.BLOCK_WEIGHT_UNITS) && (blockSigops + nextTx.ancestorSigops <= 80000))) {
         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);
+        let isCluster = false;
+        if (sortedTxSet.length > 1) {
+          cpfpClusters.set(nextTx.uid, sortedTxSet.map(tx => tx.uid));
+          isCluster = true;
+        }
+        const effectiveFeeRate = Math.min(nextTx.dependencyRate || Infinity, nextTx.ancestorFee / (nextTx.ancestorWeight / 4));
         const used: AuditTransaction[] = [];
         while (sortedTxSet.length) {
           const ancestor = sortedTxSet.pop();
-          const mempoolTx = mempool[ancestor.txid];
+          const mempoolTx = mempool.get(ancestor.uid);
+          if (!mempoolTx) {
+            continue;
+          }
           ancestor.used = true;
-          ancestor.usedBy = nextTx.txid;
+          ancestor.usedBy = nextTx.uid;
           // 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);
+          if (mempoolTx.effectiveFeePerVsize !== effectiveFeeRate) {
+            mempoolTx.effectiveFeePerVsize = effectiveFeeRate;
+            mempoolTx.dirty = true;
+          }
+          if (mempoolTx.cpfpRoot !== nextTx.uid) {
+            mempoolTx.cpfpRoot = isCluster ? nextTx.uid : null;
+            mempoolTx.dirty;
+          }
           mempoolTx.cpfpChecked = true;
           transactions.push(ancestor);
-          blockSize += ancestor.size;
           blockWeight += ancestor.weight;
           used.push(ancestor);
         }
@@ -144,7 +158,7 @@ function makeBlockTemplates({ mempool, blockLimit, weightLimit, condenseRest }:
         // remove these as valid package ancestors for any descendants remaining in the mempool
         if (used.length) {
           used.forEach(tx => {
-            updateDescendants(tx, auditPool, modified);
+            updateDescendants(tx, auditPool, modified, effectiveFeeRate);
           });
         }
 
@@ -159,14 +173,13 @@ function makeBlockTemplates({ mempool, blockLimit, weightLimit, condenseRest }:
     // 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)) {
+    if ((exceededPackageTries || queueEmpty) && blocks.length < 7) {
       // construct this block
       if (transactions.length) {
-        blocks.push(dataToMempoolBlocks(transactions.map(t => mempool[t.txid]), blockSize, blockWeight, blocks.length));
+        blocks.push(transactions.map(t => t.uid));
       }
       // 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
@@ -181,82 +194,57 @@ function makeBlockTemplates({ mempool, blockLimit, weightLimit, condenseRest }:
       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;
+
+  if (overflow.length > 0) {
+    logger.warn('GBT overflow list unexpectedly non-empty after final block constructed');
+  }
+  // add the final unbounded block if it contains any transactions
+  if (transactions.length > 0) {
+    blocks.push(transactions.map(t => t.uid));
+  }
+
+  // get map of dirty transactions
+  const rates = new Map<number, number>();
+  for (const tx of mempool.values()) {
+    if (tx?.dirty) {
+      rates.set(tx.uid, tx.effectiveFeePerVsize || tx.feePerVsize);
     }
-    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
-  };
+  return { blocks, rates, clusters: cpfpClusters };
 }
 
 // traverse in-mempool ancestors
 // recursion unavoidable, but should be limited to depth < 25 by mempool policy
 function setRelatives(
   tx: AuditTransaction,
-  mempool: { [txid: string]: AuditTransaction },
+  mempool: Map<number, 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);
+  for (const parent of tx.inputs) {
+    const parentTx = mempool.get(parent);
+    if (parentTx && !tx.ancestorMap?.has(parent)) {
+      tx.ancestorMap.set(parent, 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.ancestorMap.set(ancestor.uid, ancestor);
       });
     }
   };
   tx.ancestorFee = tx.fee || 0;
   tx.ancestorWeight = tx.weight || 0;
+  tx.ancestorSigops = tx.sigops || 0;
   tx.ancestorMap.forEach((ancestor) => {
     tx.ancestorFee += ancestor.fee;
     tx.ancestorWeight += ancestor.weight;
+    tx.ancestorSigops += ancestor.sigops;
   });
   tx.score = tx.ancestorFee / ((tx.ancestorWeight / 4) || 1);
   tx.relativesSet = true;
@@ -266,8 +254,9 @@ function setRelatives(
 // avoids recursion to limit call stack depth
 function updateDescendants(
   rootTx: AuditTransaction,
-  mempool: { [txid: string]: AuditTransaction },
+  mempool: Map<number, AuditTransaction>,
   modified: PairingHeap<AuditTransaction>,
+  clusterRate: number,
 ): void {
   const descendantSet: Set<AuditTransaction> = new Set();
   // stack of nodes left to visit
@@ -282,13 +271,15 @@ function updateDescendants(
   });
   while (descendants.length) {
     descendantTx = descendants.pop();
-    if (descendantTx && descendantTx.ancestorMap && descendantTx.ancestorMap.has(rootTx.txid)) {
+    if (descendantTx && descendantTx.ancestorMap && descendantTx.ancestorMap.has(rootTx.uid)) {
       // remove tx as ancestor
-      descendantTx.ancestorMap.delete(rootTx.txid);
+      descendantTx.ancestorMap.delete(rootTx.uid);
       descendantTx.ancestorFee -= rootTx.fee;
       descendantTx.ancestorWeight -= rootTx.weight;
+      descendantTx.ancestorSigops -= rootTx.sigops;
       tmpScore = descendantTx.score;
       descendantTx.score = descendantTx.ancestorFee / (descendantTx.ancestorWeight / 4);
+      descendantTx.dependencyRate = descendantTx.dependencyRate ? Math.min(descendantTx.dependencyRate, clusterRate) : clusterRate;
 
       if (!descendantTx.modifiedNode) {
         descendantTx.modified = true;
@@ -312,27 +303,4 @@ function updateDescendants(
       });
     }
   }
-}
-
-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

@@ -1,37 +1,90 @@
 import logger from '../logger';
 import * as WebSocket from 'ws';
 import {
-  BlockExtended, TransactionExtended, WebsocketResponse, MempoolBlock, MempoolBlockDelta,
-  OptimizedStatistic, ILoadingIndicators, IConversionRates
+  BlockExtended, TransactionExtended, MempoolTransactionExtended, WebsocketResponse,
+  OptimizedStatistic, ILoadingIndicators
 } from '../mempool.interfaces';
 import blocks from './blocks';
 import memPool from './mempool';
 import backendInfo from './backend-info';
 import mempoolBlocks from './mempool-blocks';
-import fiatConversion from './fiat-conversion';
 import { Common } from './common';
 import loadingIndicators from './loading-indicators';
 import config from '../config';
 import transactionUtils from './transaction-utils';
-import rbfCache from './rbf-cache';
+import rbfCache, { ReplacementInfo } 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';
+import { deepClone } from '../utils/clone';
+import priceUpdater from '../tasks/price-updater';
+import { ApiPrice } from '../repositories/PricesRepository';
+
+// valid 'want' subscriptions
+const wantable = [
+  'blocks',
+  'mempool-blocks',
+  'live-2h-chart',
+  'stats',
+];
 
 class WebsocketHandler {
   private wss: WebSocket.Server | undefined;
   private extraInitProperties = {};
 
+  private numClients = 0;
+  private numConnected = 0;
+  private numDisconnected = 0;
+
+  private socketData: { [key: string]: string } = {};
+  private serializedInitData: string = '{}';
+  private lastRbfSummary: ReplacementInfo | null = null;
+
   constructor() { }
 
   setWebsocketServer(wss: WebSocket.Server) {
     this.wss = wss;
   }
 
-  setExtraInitProperties(property: string, value: any) {
+  setExtraInitData(property: string, value: any) {
     this.extraInitProperties[property] = value;
+    this.updateSocketDataFields(this.extraInitProperties);
+  }
+
+  private updateSocketDataFields(data: { [property: string]: any }): void {
+    for (const property of Object.keys(data)) {
+      if (data[property] != null) {
+        this.socketData[property] = JSON.stringify(data[property]);
+      } else {
+        delete this.socketData[property];
+      }
+    }
+    this.serializedInitData = '{'
+    + Object.keys(this.socketData).map(key => `"${key}": ${this.socketData[key]}`).join(', ')
+    + '}';
+  }
+
+  private updateSocketData(): void {
+    const _blocks = blocks.getBlocks().slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT);
+    const da = difficultyAdjustment.getDifficultyAdjustment();
+    this.updateSocketDataFields({
+      'mempoolInfo': memPool.getMempoolInfo(),
+      'vBytesPerSecond': memPool.getVBytesPerSecond(),
+      'blocks': _blocks,
+      'conversions': priceUpdater.getLatestPrices(),
+      'mempool-blocks': mempoolBlocks.getMempoolBlocks(),
+      'transactions': memPool.getLatestTransactions(),
+      'backendInfo': backendInfo.getBackendInfo(),
+      'loadingIndicators': loadingIndicators.getLoadingIndicators(),
+      'da': da?.previousTime ? da : undefined,
+      'fees': feeApi.getRecommendedFee(),
+    });
+  }
+
+  public getSerializedInitData(): string {
+    return this.serializedInitData;
   }
 
   setupConnectionHandling() {
@@ -40,49 +93,76 @@ class WebsocketHandler {
     }
 
     this.wss.on('connection', (client: WebSocket) => {
+      this.numConnected++;
       client.on('error', logger.info);
+      client.on('close', () => {
+        this.numDisconnected++;
+      });
       client.on('message', async (message: string) => {
         try {
           const parsedMessage: WebsocketResponse = JSON.parse(message);
           const response = {};
 
-          if (parsedMessage.action === 'want') {
-            client['want-blocks'] = parsedMessage.data.indexOf('blocks') > -1;
-            client['want-mempool-blocks'] = parsedMessage.data.indexOf('mempool-blocks') > -1;
-            client['want-live-2h-chart'] = parsedMessage.data.indexOf('live-2h-chart') > -1;
-            client['want-stats'] = parsedMessage.data.indexOf('stats') > -1;
+          const wantNow = {};
+          if (parsedMessage && parsedMessage.action === 'want' && Array.isArray(parsedMessage.data)) {
+            for (const sub of wantable) {
+              const key = `want-${sub}`;
+              const wants = parsedMessage.data.includes(sub);
+              if (wants && client['wants'] && !client[key]) {
+                wantNow[key] = true;
+              }
+              client[key] = wants;
+            }
+            client['wants'] = true;
+          }
+
+          // send initial data when a client first starts a subscription
+          if (wantNow['want-blocks'] || (parsedMessage && parsedMessage['refresh-blocks'])) {
+            response['blocks'] = this.socketData['blocks'];
+          }
+
+          if (wantNow['want-mempool-blocks']) {
+            response['mempool-blocks'] = this.socketData['mempool-blocks'];
+          }
+
+          if (wantNow['want-stats']) {
+            response['mempoolInfo'] = this.socketData['mempoolInfo'];
+            response['vBytesPerSecond'] = this.socketData['vBytesPerSecond'];
+            response['fees'] = this.socketData['fees'];
+            response['da'] = this.socketData['da'];
           }
 
           if (parsedMessage && parsedMessage['track-tx']) {
             if (/^[a-fA-F0-9]{64}$/.test(parsedMessage['track-tx'])) {
               client['track-tx'] = parsedMessage['track-tx'];
+              const trackTxid = client['track-tx'];
               // Client is telling the transaction wasn't found
               if (parsedMessage['watch-mempool']) {
-                const rbfCacheTx = rbfCache.get(client['track-tx']);
-                if (rbfCacheTx) {
-                  response['txReplaced'] = {
-                    txid: rbfCacheTx.txid,
-                  };
+                const rbfCacheTxid = rbfCache.getReplacedBy(trackTxid);
+                if (rbfCacheTxid) {
+                  response['txReplaced'] = JSON.stringify({
+                    txid: rbfCacheTxid,
+                  });
                   client['track-tx'] = null;
                 } else {
                   // It might have appeared before we had the time to start watching for it
-                  const tx = memPool.getMempool()[client['track-tx']];
+                  const tx = memPool.getMempool()[trackTxid];
                   if (tx) {
                     if (config.MEMPOOL.BACKEND === 'esplora') {
-                      response['tx'] = tx;
+                      response['tx'] = JSON.stringify(tx);
                     } else {
                       // tx.prevout is missing from transactions when in bitcoind mode
                       try {
-                        const fullTx = await transactionUtils.$getTransactionExtended(tx.txid, true);
-                        response['tx'] = fullTx;
+                        const fullTx = await transactionUtils.$getMempoolTransactionExtended(tx.txid, true);
+                        response['tx'] = JSON.stringify(fullTx);
                       } catch (e) {
                         logger.debug('Error finding transaction: ' + (e instanceof Error ? e.message : e));
                       }
                     }
                   } else {
                     try {
-                      const fullTx = await transactionUtils.$getTransactionExtended(client['track-tx'], true);
-                      response['tx'] = fullTx;
+                      const fullTx = await transactionUtils.$getMempoolTransactionExtended(client['track-tx'], true);
+                      response['tx'] = JSON.stringify(fullTx);
                     } catch (e) {
                       logger.debug('Error finding transaction. ' + (e instanceof Error ? e.message : e));
                       client['track-mempool-tx'] = parsedMessage['track-tx'];
@@ -90,6 +170,13 @@ class WebsocketHandler {
                   }
                 }
               }
+              const tx = memPool.getMempool()[trackTxid];
+              if (tx && tx.position) {
+                response['txPosition'] = JSON.stringify({
+                  txid: trackTxid,
+                  position: tx.position,
+                });
+              }
             } else {
               client['track-tx'] = null;
             }
@@ -121,25 +208,47 @@ class WebsocketHandler {
               const index = parsedMessage['track-mempool-block'];
               client['track-mempool-block'] = index;
               const mBlocksWithTransactions = mempoolBlocks.getMempoolBlocksWithTransactions();
-              response['projected-block-transactions'] = {
+              response['projected-block-transactions'] = JSON.stringify({
                 index: index,
                 blockTransactions: mBlocksWithTransactions[index]?.transactions || [],
-              };
+              });
             } else {
               client['track-mempool-block'] = null;
             }
           }
 
+          if (parsedMessage && parsedMessage['track-rbf'] !== undefined) {
+            if (['all', 'fullRbf'].includes(parsedMessage['track-rbf'])) {
+              client['track-rbf'] = parsedMessage['track-rbf'];
+              response['rbfLatest'] = JSON.stringify(rbfCache.getRbfTrees(parsedMessage['track-rbf'] === 'fullRbf'));
+            } else {
+              client['track-rbf'] = false;
+            }
+          }
+
+          if (parsedMessage && parsedMessage['track-rbf-summary'] != null) {
+            if (parsedMessage['track-rbf-summary']) {
+              client['track-rbf-summary'] = true;
+              if (this.socketData['rbfSummary'] != null) {
+                response['rbfLatestSummary'] = this.socketData['rbfSummary'];
+              }
+            } else {
+              client['track-rbf-summary'] = false;
+            }
+          }
+
           if (parsedMessage.action === 'init') {
-            const _blocks = blocks.getBlocks().slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT);
-            if (!_blocks) {
+            if (!this.socketData['blocks']?.length || !this.socketData['da'] || !this.socketData['backendInfo'] || !this.socketData['conversions']) {
+              this.updateSocketData();
+            }
+            if (!this.socketData['blocks']?.length) {
               return;
             }
-            client.send(JSON.stringify(this.getInitData(_blocks)));
+            client.send(this.serializedInitData);
           }
 
           if (parsedMessage.action === 'ping') {
-            response['pong'] = true;
+            response['pong'] = JSON.stringify(true);
           }
 
           if (parsedMessage['track-donation'] && parsedMessage['track-donation'].length === 22) {
@@ -155,7 +264,8 @@ class WebsocketHandler {
           }
 
           if (Object.keys(response).length) {
-            client.send(JSON.stringify(response));
+            const serializedResponse = this.serializeResponse(response);
+            client.send(serializedResponse);
           }
         } catch (e) {
           logger.debug('Error parsing websocket message: ' + (e instanceof Error ? e.message : e));
@@ -184,51 +294,44 @@ class WebsocketHandler {
       throw new Error('WebSocket.Server is not set');
     }
 
+    this.updateSocketDataFields({ 'loadingIndicators': indicators });
+
+    const response = JSON.stringify({ loadingIndicators: indicators });
     this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
-      client.send(JSON.stringify({ loadingIndicators: indicators }));
+      client.send(response);
     });
   }
 
-  handleNewConversionRates(conversionRates: IConversionRates) {
+  handleNewConversionRates(conversionRates: ApiPrice) {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
+    this.updateSocketDataFields({ 'conversions': conversionRates });
+
+    const response = JSON.stringify({ conversions: conversionRates });
     this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
-      client.send(JSON.stringify({ conversions: conversionRates }));
+      client.send(response);
     });
   }
 
-  getInitData(_blocks?: BlockExtended[]) {
-    if (!_blocks) {
-      _blocks = blocks.getBlocks().slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT);
-    }
-    return {
-      'mempoolInfo': memPool.getMempoolInfo(),
-      'vBytesPerSecond': memPool.getVBytesPerSecond(),
-      '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
-    };
-  }
-
   handleNewStatistic(stats: OptimizedStatistic) {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
+    this.printLogs();
+
+    const response = JSON.stringify({
+      'live-2h-chart': stats
+    });
+
     this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
@@ -238,22 +341,60 @@ class WebsocketHandler {
         return;
       }
 
-      client.send(JSON.stringify({
-        'live-2h-chart': stats
-      }));
+      client.send(response);
     });
   }
 
-  async handleMempoolChange(newMempool: { [txid: string]: TransactionExtended },
-    newTransactions: TransactionExtended[], deletedTransactions: TransactionExtended[]): Promise<void> {
+  handleReorg(): void {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
+    const da = difficultyAdjustment.getDifficultyAdjustment();
+
+    // update init data
+    this.updateSocketDataFields({
+      'blocks': blocks.getBlocks(),
+      'da': da?.previousTime ? da : undefined,
+    });
+
+    this.wss.clients.forEach((client) => {
+      if (client.readyState !== WebSocket.OPEN) {
+        return;
+      }
+
+      const response = {};
+
+      if (client['want-blocks']) {
+        response['blocks'] = this.socketData['blocks'];
+      }
+      if (client['want-stats']) {
+        response['da'] = this.socketData['da'];
+      }
+
+      if (Object.keys(response).length) {
+        const serializedResponse = this.serializeResponse(response);
+        client.send(serializedResponse);
+      }
+    });
+  }
+
+  async $handleMempoolChange(newMempool: { [txid: string]: MempoolTransactionExtended }, mempoolSize: number,
+    newTransactions: MempoolTransactionExtended[], deletedTransactions: MempoolTransactionExtended[]): Promise<void> {
+    if (!this.wss) {
+      throw new Error('WebSocket.Server is not set');
+    }
+
+    this.printLogs();
+
     if (config.MEMPOOL.ADVANCED_GBT_MEMPOOL) {
-      await mempoolBlocks.makeBlockTemplates(newMempool, 8, null, true);
+      if (config.MEMPOOL.RUST_GBT) {
+        await mempoolBlocks.$rustUpdateBlockTemplates(newMempool, mempoolSize, newTransactions, deletedTransactions);
+      } else {
+        await mempoolBlocks.$updateBlockTemplates(newMempool, newTransactions, deletedTransactions, true);
+      }
     } else {
-      mempoolBlocks.updateMempoolBlocks(newMempool);
+      mempoolBlocks.updateMempoolBlocks(newMempool, true);
     }
 
     const mBlocks = mempoolBlocks.getMempoolBlocks();
@@ -263,8 +404,72 @@ class WebsocketHandler {
     const rbfTransactions = Common.findRbfTransactions(newTransactions, deletedTransactions);
     const da = difficultyAdjustment.getDifficultyAdjustment();
     memPool.handleRbfTransactions(rbfTransactions);
+    const rbfChanges = rbfCache.getRbfChanges();
+    let rbfReplacements;
+    let fullRbfReplacements;
+    let rbfSummary;
+    if (Object.keys(rbfChanges.trees).length) {
+      rbfReplacements = rbfCache.getRbfTrees(false);
+      fullRbfReplacements = rbfCache.getRbfTrees(true);
+      rbfSummary = rbfCache.getLatestRbfSummary();
+    }
+
+    for (const deletedTx of deletedTransactions) {
+      rbfCache.evict(deletedTx.txid);
+    }
+    memPool.removeFromSpendMap(deletedTransactions);
+    memPool.addToSpendMap(newTransactions);
     const recommendedFees = feeApi.getRecommendedFee();
 
+    const latestTransactions = memPool.getLatestTransactions();
+
+    // update init data
+    const socketDataFields = {
+      'mempoolInfo': mempoolInfo,
+      'vBytesPerSecond': vBytesPerSecond,
+      'mempool-blocks': mBlocks,
+      'transactions': latestTransactions,
+      'loadingIndicators': loadingIndicators.getLoadingIndicators(),
+      'da': da?.previousTime ? da : undefined,
+      'fees': recommendedFees,
+    };
+    if (rbfSummary) {
+      socketDataFields['rbfSummary'] = rbfSummary;
+    }
+    this.updateSocketDataFields(socketDataFields);
+
+    // cache serialized objects to avoid stringify-ing the same thing for every client
+    const responseCache = { ...this.socketData };
+    function getCachedResponse(key: string,  data): string {
+      if (!responseCache[key]) {
+        responseCache[key] = JSON.stringify(data);
+      }
+      return responseCache[key];
+    }
+
+    // pre-compute new tracked outspends
+    const outspendCache: { [txid: string]: { [vout: number]: { vin: number, txid: string } } } = {};
+    const trackedTxs = new Set<string>();
+    this.wss.clients.forEach((client) => {
+      if (client['track-tx']) {
+        trackedTxs.add(client['track-tx']);
+      }
+    });
+    if (trackedTxs.size > 0) {
+      for (const tx of newTransactions) {
+        for (let i = 0; i < tx.vin.length; i++) {
+          const vin = tx.vin[i];
+          if (trackedTxs.has(vin.txid)) {
+            if (!outspendCache[vin.txid]) {
+              outspendCache[vin.txid] = { [vin.vout]: { vin: i, txid: tx.txid }};
+            } else {
+              outspendCache[vin.txid][vin.vout] = { vin: i, txid: tx.txid };
+            }
+          }
+        }
+      }
+    }
+
     this.wss.clients.forEach(async (client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
@@ -273,15 +478,17 @@ class WebsocketHandler {
       const response = {};
 
       if (client['want-stats']) {
-        response['mempoolInfo'] = mempoolInfo;
-        response['vBytesPerSecond'] = vBytesPerSecond;
-        response['transactions'] = newTransactions.slice(0, 6).map((tx) => Common.stripTransaction(tx));
-        response['da'] = da;
-        response['fees'] = recommendedFees;
+        response['mempoolInfo'] = getCachedResponse('mempoolInfo', mempoolInfo);
+        response['vBytesPerSecond'] = getCachedResponse('vBytesPerSecond', vBytesPerSecond);
+        response['transactions'] = getCachedResponse('transactions', latestTransactions);
+        if (da?.previousTime) {
+          response['da'] = getCachedResponse('da', da);
+        }
+        response['fees'] = getCachedResponse('fees', recommendedFees);
       }
 
       if (client['want-mempool-blocks']) {
-        response['mempool-blocks'] = mBlocks;
+        response['mempool-blocks'] = getCachedResponse('mempool-blocks', mBlocks);
       }
 
       if (client['track-mempool-tx']) {
@@ -289,13 +496,13 @@ class WebsocketHandler {
         if (tx) {
           if (config.MEMPOOL.BACKEND !== 'esplora') {
             try {
-              const fullTx = await transactionUtils.$getTransactionExtended(tx.txid, true);
-              response['tx'] = fullTx;
+              const fullTx = await transactionUtils.$getMempoolTransactionExtended(tx.txid, true);
+              response['tx'] = JSON.stringify(fullTx);
             } catch (e) {
               logger.debug('Error finding transaction in mempool: ' + (e instanceof Error ? e.message : e));
             }
           } else {
-            response['tx'] = tx;
+            response['tx'] = JSON.stringify(tx);
           }
           client['track-mempool-tx'] = null;
         }
@@ -309,7 +516,7 @@ class WebsocketHandler {
           if (someVin) {
             if (config.MEMPOOL.BACKEND !== 'esplora') {
               try {
-                const fullTx = await transactionUtils.$getTransactionExtended(tx.txid, true);
+                const fullTx = await transactionUtils.$getMempoolTransactionExtended(tx.txid, true);
                 foundTransactions.push(fullTx);
               } catch (e) {
                 logger.debug('Error finding transaction in mempool: ' + (e instanceof Error ? e.message : e));
@@ -323,7 +530,7 @@ class WebsocketHandler {
           if (someVout) {
             if (config.MEMPOOL.BACKEND !== 'esplora') {
               try {
-                const fullTx = await transactionUtils.$getTransactionExtended(tx.txid, true);
+                const fullTx = await transactionUtils.$getMempoolTransactionExtended(tx.txid, true);
                 foundTransactions.push(fullTx);
               } catch (e) {
                 logger.debug('Error finding transaction in mempool: ' + (e instanceof Error ? e.message : e));
@@ -335,7 +542,7 @@ class WebsocketHandler {
         }
 
         if (foundTransactions.length) {
-          response['address-transactions'] = foundTransactions;
+          response['address-transactions'] = JSON.stringify(foundTransactions);
         }
       }
 
@@ -364,142 +571,227 @@ class WebsocketHandler {
         });
 
         if (foundTransactions.length) {
-          response['address-transactions'] = foundTransactions;
+          response['address-transactions'] = JSON.stringify(foundTransactions);
         }
       }
 
       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,
-            };
-          }
-        }));
+        const trackTxid = client['track-tx'];
+        const outspends = outspendCache[trackTxid];
 
-        if (Object.keys(outspends).length) {
-          response['utxoSpent'] = outspends;
+        if (outspends && Object.keys(outspends).length) {
+          response['utxoSpent'] = JSON.stringify(outspends);
         }
 
-        if (rbfTransactions[client['track-tx']]) {
-          for (const rbfTransaction in rbfTransactions) {
-            if (client['track-tx'] === rbfTransaction) {
-              response['rbfTransaction'] = {
-                txid: rbfTransactions[rbfTransaction].txid,
-              };
-              break;
-            }
-          }
+        const rbfReplacedBy = rbfCache.getReplacedBy(client['track-tx']);
+        if (rbfReplacedBy) {
+          response['rbfTransaction'] = JSON.stringify({
+            txid: rbfReplacedBy,
+          });
+        }
+
+        const rbfChange = rbfChanges.map[client['track-tx']];
+        if (rbfChange) {
+          response['rbfInfo'] = JSON.stringify(rbfChanges.trees[rbfChange]);
+        }
+
+        const mempoolTx = newMempool[trackTxid];
+        if (mempoolTx && mempoolTx.position) {
+          response['txPosition'] = JSON.stringify({
+            txid: trackTxid,
+            position: mempoolTx.position,
+          });
         }
       }
 
       if (client['track-mempool-block'] >= 0) {
         const index = client['track-mempool-block'];
         if (mBlockDeltas[index]) {
-          response['projected-block-transactions'] = {
+          response['projected-block-transactions'] = getCachedResponse(`projected-block-transactions-${index}`, {
             index: index,
             delta: mBlockDeltas[index],
-          };
+          });
         }
       }
 
+      if (client['track-rbf'] === 'all' && rbfReplacements) {
+        response['rbfLatest'] = getCachedResponse('rbfLatest', rbfReplacements);
+      } else if (client['track-rbf'] === 'fullRbf' && fullRbfReplacements) {
+        response['rbfLatest'] = getCachedResponse('fullrbfLatest', fullRbfReplacements);
+      }
+
+      if (client['track-rbf-summary'] && rbfSummary) {
+        response['rbfLatestSummary'] = getCachedResponse('rbfLatestSummary', rbfSummary);
+      }
+
       if (Object.keys(response).length) {
-        client.send(JSON.stringify(response));
+        const serializedResponse = this.serializeResponse(response);
+        client.send(serializedResponse);
       }
     });
   }
  
-  async handleNewBlock(block: BlockExtended, txIds: string[], transactions: TransactionExtended[]): Promise<void> {
+  async handleNewBlock(block: BlockExtended, txIds: string[], transactions: MempoolTransactionExtended[]): Promise<void> {
     if (!this.wss) {
       throw new Error('WebSocket.Server is not set');
     }
 
+    this.printLogs();
+
     const _memPool = memPool.getMempool();
 
-    if (config.MEMPOOL.ADVANCED_GBT_AUDIT) {
-      await mempoolBlocks.makeBlockTemplates(_memPool, 2);
-    } else {
-      mempoolBlocks.updateMempoolBlocks(_memPool);
-    }
+    const rbfTransactions = Common.findMinedRbfTransactions(transactions, memPool.getSpendMap());
+    memPool.handleMinedRbfTransactions(rbfTransactions);
+    memPool.removeFromSpendMap(transactions);
 
-    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.$saveTemplate({
-        height: block.height,
-        template: {
-          id: block.id,
-          transactions: stripped
+    if (config.MEMPOOL.AUDIT) {
+      let projectedBlocks;
+      let auditMempool = _memPool;
+      // template calculation functions have mempool side effects, so calculate audits using
+      // a cloned copy of the mempool if we're running a different algorithm for mempool updates
+      const separateAudit = config.MEMPOOL.ADVANCED_GBT_AUDIT !== config.MEMPOOL.ADVANCED_GBT_MEMPOOL;
+      if (separateAudit) {
+        auditMempool = deepClone(_memPool);
+        if (config.MEMPOOL.ADVANCED_GBT_AUDIT) {
+          if (config.MEMPOOL.RUST_GBT) {
+            projectedBlocks = await mempoolBlocks.$oneOffRustBlockTemplates(auditMempool);
+          } else {
+            projectedBlocks = await mempoolBlocks.$makeBlockTemplates(auditMempool, false);
+          }
+        } else {
+          projectedBlocks = mempoolBlocks.updateMempoolBlocks(auditMempool, false);
         }
-      });
+      } else {
+        projectedBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
+      }
 
-      BlocksAuditsRepository.$saveAudit({
-        time: block.timestamp,
-        height: block.height,
-        hash: block.id,
-        addedTxs: added,
-        missingTxs: censored,
-        freshTxs: fresh,
-        matchRate: matchRate,
-      });
+      if (Common.indexingEnabled() && memPool.isInSync()) {
+        const { censored, added, fresh, sigop, fullrbf, score, similarity } = Audit.auditBlock(transactions, projectedBlocks, auditMempool);
+        const matchRate = Math.round(score * 100 * 100) / 100;
 
-      if (block.extras) {
-        block.extras.matchRate = matchRate;
+        const stripped = projectedBlocks[0]?.transactions ? projectedBlocks[0].transactions : [];
+
+        let totalFees = 0;
+        let totalWeight = 0;
+        for (const tx of stripped) {
+          totalFees += tx.fee;
+          totalWeight += (tx.vsize * 4);
+        }
+
+        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,
+          sigopTxs: sigop,
+          fullrbfTxs: fullrbf,
+          matchRate: matchRate,
+          expectedFees: totalFees,
+          expectedWeight: totalWeight,
+        });
+
+        if (block.extras) {
+          block.extras.matchRate = matchRate;
+          block.extras.expectedFees = totalFees;
+          block.extras.expectedWeight = totalWeight;
+          block.extras.similarity = similarity;
+        }
+      }
+    } else if (block.extras) {
+      const mBlocks = mempoolBlocks.getMempoolBlocksWithTransactions();
+      if (mBlocks?.length && mBlocks[0].transactions) {
+        block.extras.similarity = Common.getSimilarity(mBlocks[0], transactions);
       }
     }
 
     // Update mempool to remove transactions included in the new block
     for (const txId of txIds) {
       delete _memPool[txId];
+      rbfCache.mined(txId);
     }
 
     if (config.MEMPOOL.ADVANCED_GBT_MEMPOOL) {
-      await mempoolBlocks.makeBlockTemplates(_memPool, 8, null, true);
+      if (config.MEMPOOL.RUST_GBT) {
+        await mempoolBlocks.$rustUpdateBlockTemplates(_memPool, Object.keys(_memPool).length, [], transactions);
+      } else {
+        await mempoolBlocks.$makeBlockTemplates(_memPool, true);
+      }
     } else {
-      mempoolBlocks.updateMempoolBlocks(_memPool);
+      mempoolBlocks.updateMempoolBlocks(_memPool, true);
     }
     const mBlocks = mempoolBlocks.getMempoolBlocks();
     const mBlockDeltas = mempoolBlocks.getMempoolBlockDeltas();
 
     const da = difficultyAdjustment.getDifficultyAdjustment();
     const fees = feeApi.getRecommendedFee();
+    const mempoolInfo = memPool.getMempoolInfo();
+
+    // update init data
+    this.updateSocketDataFields({
+      'mempoolInfo': mempoolInfo,
+      'blocks': [...blocks.getBlocks(), block].slice(-config.MEMPOOL.INITIAL_BLOCKS_AMOUNT),
+      'mempool-blocks': mBlocks,
+      'loadingIndicators': loadingIndicators.getLoadingIndicators(),
+      'da': da?.previousTime ? da : undefined,
+      'fees': fees,
+    });
+
+    const responseCache = { ...this.socketData };
+    function getCachedResponse(key, data): string {
+      if (!responseCache[key]) {
+        responseCache[key] = JSON.stringify(data);
+      }
+      return responseCache[key];
+    }
 
     this.wss.clients.forEach((client) => {
       if (client.readyState !== WebSocket.OPEN) {
         return;
       }
 
-      if (!client['want-blocks']) {
-        return;
+      const response = {};
+
+      if (client['want-blocks']) {
+        response['block'] = getCachedResponse('block', block);
       }
 
-      const response = {
-        'block': block,
-        'mempoolInfo': memPool.getMempoolInfo(),
-        'da': da,
-        'fees': fees,
-      };
+      if (client['want-stats']) {
+        response['mempoolInfo'] = getCachedResponse('mempoolInfo', mempoolInfo);
+        response['vBytesPerSecond'] = getCachedResponse('vBytesPerSecond', memPool.getVBytesPerSecond());
+        response['fees'] = getCachedResponse('fees', fees);
+
+        if (da?.previousTime) {
+          response['da'] = getCachedResponse('da', da);
+        }
+      }
 
       if (mBlocks && client['want-mempool-blocks']) {
-        response['mempool-blocks'] = mBlocks;
+        response['mempool-blocks'] = getCachedResponse('mempool-blocks', mBlocks);
       }
 
-      if (client['track-tx'] && txIds.indexOf(client['track-tx']) > -1) {
-        response['txConfirmed'] = true;
+      if (client['track-tx']) {
+        const trackTxid = client['track-tx'];
+        if (trackTxid && txIds.indexOf(trackTxid) > -1) {
+          response['txConfirmed'] = JSON.stringify(trackTxid);
+        } else {
+          const mempoolTx = _memPool[trackTxid];
+          if (mempoolTx && mempoolTx.position) {
+            response['txPosition'] = JSON.stringify({
+              txid: trackTxid,
+              position: mempoolTx.position,
+            });
+          }
+        }
       }
 
       if (client['track-address']) {
@@ -525,7 +817,7 @@ class WebsocketHandler {
             };
           });
 
-          response['block-transactions'] = foundTransactions;
+          response['block-transactions'] = JSON.stringify(foundTransactions);
         }
       }
 
@@ -562,23 +854,45 @@ class WebsocketHandler {
             };
           });
 
-          response['block-transactions'] = foundTransactions;
+          response['block-transactions'] = JSON.stringify(foundTransactions);
         }
       }
 
       if (client['track-mempool-block'] >= 0) {
         const index = client['track-mempool-block'];
         if (mBlockDeltas && mBlockDeltas[index]) {
-          response['projected-block-transactions'] = {
+          response['projected-block-transactions'] = getCachedResponse(`projected-block-transactions-${index}`, {
             index: index,
             delta: mBlockDeltas[index],
-          };
+          });
         }
       }
 
-      client.send(JSON.stringify(response));
+      if (Object.keys(response).length) {
+        const serializedResponse = this.serializeResponse(response);
+        client.send(serializedResponse);
+      }
     });
   }
+
+  // takes a dictionary of JSON serialized values
+  // and zips it together into a valid JSON object
+  private serializeResponse(response): string {
+    return '{'
+        + Object.keys(response).map(key => `"${key}": ${response[key]}`).join(', ')
+        + '}';
+  }
+
+  private printLogs(): void {
+    if (this.wss) {
+      const count = this.wss?.clients?.size || 0;
+      const diff = count - this.numClients;
+      this.numClients = count;
+      logger.debug(`${count} websocket clients | ${this.numConnected} connected | ${this.numDisconnected} disconnected | (${diff >= 0 ? '+' : ''}${diff})`);
+      this.numConnected = 0;
+      this.numDisconnected = 0;
+    }
+  }
 }
 
 export default new WebsocketHandler();

backend/src/config.ts

@@ -5,7 +5,7 @@ const configFromFile = require(
 interface IConfig {
   MEMPOOL: {
     ENABLED: boolean;
-    NETWORK: 'mainnet' | 'testnet' | 'signet' | 'liquid' | 'liquidtestnet';
+    NETWORK: 'mainnet' | 'testnet' | 'signet' | 'regtest' | 'liquid' | 'liquidtestnet';
     BACKEND: 'esplora' | 'electrum' | 'none';
     HTTP_PORT: number;
     SPAWN_CLUSTER_PROCS: number;
@@ -19,7 +19,6 @@ interface IConfig {
     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;
@@ -29,12 +28,20 @@ interface IConfig {
     AUTOMATIC_BLOCK_REINDEXING: boolean;
     POOLS_JSON_URL: string,
     POOLS_JSON_TREE_URL: string,
+    AUDIT: boolean;
     ADVANCED_GBT_AUDIT: boolean;
     ADVANCED_GBT_MEMPOOL: boolean;
-    TRANSACTION_INDEXING: boolean;
+    RUST_GBT: boolean;
+    CPFP_INDEXING: boolean;
+    MAX_BLOCKS_BULK_QUERY: number;
+    DISK_CACHE_BLOCK_INTERVAL: number;
+    MAX_PUSH_TX_SIZE_WEIGHT: number;
+    ALLOW_UNREACHABLE: boolean;
   };
   ESPLORA: {
     REST_API_URL: string;
+    UNIX_SOCKET_PATH: string | void | null;
+    RETRY_UNIX_SOCKET_AFTER: number;
   };
   LIGHTNING: {
     ENABLED: boolean;
@@ -50,6 +57,7 @@ interface IConfig {
     TLS_CERT_PATH: string;
     MACAROON_PATH: string;
     REST_API_URL: string;
+    TIMEOUT: number;
   };
   CLIGHTNING: {
     SOCKET: string;
@@ -64,12 +72,14 @@ interface IConfig {
     PORT: number;
     USERNAME: string;
     PASSWORD: string;
+    TIMEOUT: number;
   };
   SECOND_CORE_RPC: {
     HOST: string;
     PORT: number;
     USERNAME: string;
     PASSWORD: string;
+    TIMEOUT: number;
   };
   DATABASE: {
     ENABLED: boolean;
@@ -79,6 +89,7 @@ interface IConfig {
     DATABASE: string;
     USERNAME: string;
     PASSWORD: string;
+    TIMEOUT: number;
   };
   SYSLOG: {
     ENABLED: boolean;
@@ -121,6 +132,12 @@ interface IConfig {
     GEOLITE2_ASN: string;
     GEOIP2_ISP: string;
   },
+  REPLICATION: {
+    ENABLED: boolean;
+    AUDIT: boolean;
+    AUDIT_START_HEIGHT: number;
+    SERVERS: string[];
+  }
 }
 
 const defaults: IConfig = {
@@ -140,7 +157,6 @@ const defaults: IConfig = {
     'MEMPOOL_BLOCKS_AMOUNT': 8,
     '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,
@@ -148,14 +164,22 @@ const defaults: IConfig = {
     '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_URL': 'https://raw.githubusercontent.com/mempool/mining-pools/master/pools-v2.json',
     'POOLS_JSON_TREE_URL': 'https://api.github.com/repos/mempool/mining-pools/git/trees/master',
+    'AUDIT': false,
     'ADVANCED_GBT_AUDIT': false,
     'ADVANCED_GBT_MEMPOOL': false,
-    'TRANSACTION_INDEXING': false,
+    'RUST_GBT': false,
+    'CPFP_INDEXING': false,
+    'MAX_BLOCKS_BULK_QUERY': 0,
+    'DISK_CACHE_BLOCK_INTERVAL': 6,
+    'MAX_PUSH_TX_SIZE_WEIGHT': 400000,
+    'ALLOW_UNREACHABLE': true,
   },
   'ESPLORA': {
     'REST_API_URL': 'http://127.0.0.1:3000',
+    'UNIX_SOCKET_PATH': null,
+    'RETRY_UNIX_SOCKET_AFTER': 30000,
   },
   'ELECTRUM': {
     'HOST': '127.0.0.1',
@@ -166,13 +190,15 @@ const defaults: IConfig = {
     'HOST': '127.0.0.1',
     'PORT': 8332,
     'USERNAME': 'mempool',
-    'PASSWORD': 'mempool'
+    'PASSWORD': 'mempool',
+    'TIMEOUT': 60000,
   },
   'SECOND_CORE_RPC': {
     'HOST': '127.0.0.1',
     'PORT': 8332,
     'USERNAME': 'mempool',
-    'PASSWORD': 'mempool'
+    'PASSWORD': 'mempool',
+    'TIMEOUT': 60000,
   },
   'DATABASE': {
     'ENABLED': true,
@@ -181,7 +207,8 @@ const defaults: IConfig = {
     'PORT': 3306,
     'DATABASE': 'mempool',
     'USERNAME': 'mempool',
-    'PASSWORD': 'mempool'
+    'PASSWORD': 'mempool',
+    'TIMEOUT': 180000,
   },
   'SYSLOG': {
     'ENABLED': true,
@@ -212,6 +239,7 @@ const defaults: IConfig = {
     'TLS_CERT_PATH': '',
     'MACAROON_PATH': '',
     'REST_API_URL': 'https://localhost:8080',
+    'TIMEOUT': 10000,
   },
   'CLIGHTNING': {
     'SOCKET': '',
@@ -242,6 +270,12 @@ const defaults: IConfig = {
     'GEOLITE2_ASN': '/usr/local/share/GeoIP/GeoLite2-ASN.mmdb',
     'GEOIP2_ISP': '/usr/local/share/GeoIP/GeoIP2-ISP.mmdb'
   },
+  'REPLICATION': {
+    'ENABLED': false,
+    'AUDIT': false,
+    'AUDIT_START_HEIGHT': 774000,
+    'SERVERS': [],
+  }
 };
 
 class Config implements IConfig {
@@ -261,6 +295,7 @@ class Config implements IConfig {
   PRICE_DATA_SERVER: IConfig['PRICE_DATA_SERVER'];
   EXTERNAL_DATA_SERVER: IConfig['EXTERNAL_DATA_SERVER'];
   MAXMIND: IConfig['MAXMIND'];
+  REPLICATION: IConfig['REPLICATION'];
 
   constructor() {
     const configs = this.merge(configFromFile, defaults);
@@ -280,6 +315,7 @@ class Config implements IConfig {
     this.PRICE_DATA_SERVER = configs.PRICE_DATA_SERVER;
     this.EXTERNAL_DATA_SERVER = configs.EXTERNAL_DATA_SERVER;
     this.MAXMIND = configs.MAXMIND;
+    this.REPLICATION = configs.REPLICATION;
   }
 
   merge = (...objects: object[]): IConfig => {

backend/src/database.ts

@@ -24,16 +24,70 @@ import { FieldPacket, OkPacket, PoolOptions, ResultSetHeader, RowDataPacket } fr
 
   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');
+      const stack = new Error().stack;
+      logger.err(`Trying to use DB feature but config.DATABASE.ENABLED is set to false, please open an issue.\nStack trace: ${stack}}`);
     }
   }
 
   public async query<T extends RowDataPacket[][] | RowDataPacket[] | OkPacket |
-    OkPacket[] | ResultSetHeader>(query, params?): Promise<[T, FieldPacket[]]>
+    OkPacket[] | ResultSetHeader>(query, params?, connection?: PoolConnection): Promise<[T, FieldPacket[]]>
   {
     this.checkDBFlag();
+    let hardTimeout;
+    if (query?.timeout != null) {
+      hardTimeout = Math.floor(query.timeout * 1.1);
+    } else {
+      hardTimeout = config.DATABASE.TIMEOUT;
+    }
+    if (hardTimeout > 0) {
+      return new Promise((resolve, reject) => {
+        const timer = setTimeout(() => {
+          reject(new Error(`DB query failed to return, reject or time out within ${hardTimeout / 1000}s - ${query?.sql?.slice(0, 160) || (typeof(query) === 'string' || query instanceof String ? query?.slice(0, 160) : 'unknown query')}`));
+        }, hardTimeout);
+
+        // Use a specific connection if provided, otherwise delegate to the pool
+        const connectionPromise = connection ? Promise.resolve(connection) : this.getPool();
+        connectionPromise.then((pool: PoolConnection | Pool) => {
+          return pool.query(query, params) as Promise<[T, FieldPacket[]]>;
+        }).then(result => {
+          resolve(result);
+        }).catch(error => {
+          reject(error);
+        }).finally(() => {
+          clearTimeout(timer);
+        });
+      });
+    } else {
+      const pool = await this.getPool();
+      return pool.query(query, params);
+    }
+  }
+
+  public async $atomicQuery<T extends RowDataPacket[][] | RowDataPacket[] | OkPacket |
+    OkPacket[] | ResultSetHeader>(queries: { query, params }[]): Promise<[T, FieldPacket[]][]>
+  {
     const pool = await this.getPool();
-    return pool.query(query, params);
+    const connection = await pool.getConnection();
+    try {
+      await connection.beginTransaction();
+
+      const results: [T, FieldPacket[]][]  = [];
+      for (const query of queries) {
+        const result = await this.query(query.query, query.params, connection) as [T, FieldPacket[]];
+        results.push(result);
+      }
+
+      await connection.commit();
+
+      return results;
+    } catch (e) {
+      logger.err('Could not complete db transaction, rolling back: ' + (e instanceof Error ? e.message : e));
+      connection.rollback();
+      connection.release();
+      throw e;
+    } finally {
+      connection.release();
+    }
   }
 
   public async checkDbConnection() {

backend/src/index.ts

@@ -2,6 +2,7 @@ import express from 'express';
 import { Application, Request, Response, NextFunction } from 'express';
 import * as http from 'http';
 import * as WebSocket from 'ws';
+import bitcoinApi from './api/bitcoin/bitcoin-api-factory';
 import cluster from 'cluster';
 import DB from './database';
 import config from './config';
@@ -10,7 +11,6 @@ import memPool from './api/mempool';
 import diskCache from './api/disk-cache';
 import statistics from './api/statistics/statistics';
 import websocketHandler from './api/websocket-handler';
-import fiatConversion from './api/fiat-conversion';
 import bisq from './api/bisq/bisq';
 import bisqMarkets from './api/bisq/markets';
 import logger from './logger';
@@ -36,12 +36,23 @@ 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';
+import priceUpdater from './tasks/price-updater';
+import chainTips from './api/chain-tips';
+import { AxiosError } from 'axios';
+import v8 from 'v8';
+import { formatBytes, getBytesUnit } from './utils/format';
 
 class Server {
   private wss: WebSocket.Server | undefined;
   private server: http.Server | undefined;
   private app: Application;
-  private currentBackendRetryInterval = 5;
+  private currentBackendRetryInterval = 1;
+  private backendRetryCount = 0;
+
+  private maxHeapSize: number = 0;
+  private heapLogInterval: number = 60;
+  private warnedHeapCritical: boolean = false;
+  private lastHeapLogTime: number | null = null;
 
   constructor() {
     this.app = express();
@@ -78,6 +89,18 @@ class Server {
   async startServer(worker = false): Promise<void> {
     logger.notice(`Starting Mempool Server${worker ? ' (worker)' : ''}... (${backendInfo.getShortCommitHash()})`);
 
+    if (config.DATABASE.ENABLED) {
+      await DB.checkDbConnection();
+      try {
+        if (process.env.npm_config_reindex_blocks === 'true') { // Re-index requests
+          await databaseMigration.$blocksReindexingTruncate();
+        }
+        await databaseMigration.$initializeOrMigrateDatabase();
+      } catch (e) {
+        throw new Error(e instanceof Error ? e.message : 'Error');
+      }
+    }
+
     this.app
       .use((req: Request, res: Response, next: NextFunction) => {
         res.setHeader('Access-Control-Allow-Origin', '*');
@@ -87,32 +110,19 @@ class Server {
       .use(express.text({ type: ['text/plain', 'application/base64'] }))
       ;
 
+    if (config.DATABASE.ENABLED) {
+      await priceUpdater.$initializeLatestPriceWithDb();
+    }
+
     this.server = http.createServer(this.app);
     this.wss = new WebSocket.Server({ server: this.server });
 
     this.setUpWebsocketHandling();
 
+    await poolsUpdater.updatePoolsJson(); // Needs to be done before loading the disk cache because we sometimes wipe it
     await syncAssets.syncAssets$();
     if (config.MEMPOOL.ENABLED) {
-      diskCache.loadMempoolCache();
-    }
-
-    if (config.DATABASE.ENABLED) {
-      await DB.checkDbConnection();
-      try {
-        if (process.env.npm_config_reindex !== undefined) { // Re-index requests
-          const tables = process.env.npm_config_reindex.split(',');
-          logger.warn(`Indexed data for "${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');
-      }
+      await diskCache.$loadMempoolCache();
     }
 
     if (config.STATISTICS.ENABLED && config.DATABASE.ENABLED && cluster.isPrimary) {
@@ -127,7 +137,8 @@ class Server {
       }
     }
 
-    fiatConversion.startService();
+    priceUpdater.$run();
+    await chainTips.updateOrphanedBlocks();
 
     this.setUpHttpApiRoutes();
 
@@ -135,9 +146,11 @@ class Server {
       this.runMainUpdateLoop();
     }
 
+    setInterval(() => { this.healthCheck(); }, 2500);
+
     if (config.BISQ.ENABLED) {
       bisq.startBisqService();
-      bisq.setPriceCallbackFunction((price) => websocketHandler.setExtraInitProperties('bsq-price', price));
+      bisq.setPriceCallbackFunction((price) => websocketHandler.setExtraInitData('bsq-price', price));
       blocks.setNewBlockCallback(bisq.handleNewBitcoinBlock.bind(bisq));
       bisqMarkets.startBisqService();
     }
@@ -156,6 +169,7 @@ class Server {
   }
 
   async runMainUpdateLoop(): Promise<void> {
+    const start = Date.now();
     try {
       try {
         await memPool.$updateMemPoolInfo();
@@ -167,25 +181,39 @@ class Server {
           logger.debug(msg);
         }
       }
-      await poolsUpdater.updatePoolsJson();
-      await blocks.$updateBlocks();
-      await memPool.$updateMempool();
+      const newMempool = await bitcoinApi.$getRawMempool();
+      const numHandledBlocks = await blocks.$updateBlocks();
+      if (numHandledBlocks === 0) {
+        await memPool.$updateMempool(newMempool);
+      }
       indexer.$run();
 
-      setTimeout(this.runMainUpdateLoop.bind(this), config.MEMPOOL.POLL_RATE_MS);
-      this.currentBackendRetryInterval = 5;
-    } catch (e) {
-      const loggerMsg = `runMainLoop error: ${(e instanceof Error ? e.message : e)}. Retrying in ${this.currentBackendRetryInterval} sec.`;
-      if (this.currentBackendRetryInterval > 5) {
+      // rerun immediately if we skipped the mempool update, otherwise wait POLL_RATE_MS
+      const elapsed = Date.now() - start;
+      const remainingTime = Math.max(0, config.MEMPOOL.POLL_RATE_MS - elapsed)
+      setTimeout(this.runMainUpdateLoop.bind(this), numHandledBlocks > 0 ? 0 : remainingTime);
+      this.backendRetryCount = 0;
+    } catch (e: any) {
+      this.backendRetryCount++;
+      let loggerMsg = `Exception in runMainUpdateLoop() (count: ${this.backendRetryCount}). Retrying in ${this.currentBackendRetryInterval} sec.`;
+      loggerMsg += ` Reason: ${(e instanceof Error ? e.message : e)}.`;
+      if (e?.stack) {
+        loggerMsg += ` Stack trace: ${e.stack}`;
+      }
+      // When we get a first Exception, only `logger.debug` it and retry after 5 seconds
+      // From the second Exception, `logger.warn` the Exception and increase the retry delay
+      if (this.backendRetryCount >= 5) {
         logger.warn(loggerMsg);
         mempool.setOutOfSync();
       } else {
         logger.debug(loggerMsg);
       }
-      logger.debug(JSON.stringify(e));
+      if (e instanceof AxiosError) {
+        logger.debug(`AxiosError: ${e?.message}`);
+      }
       setTimeout(this.runMainUpdateLoop.bind(this), 1000 * this.currentBackendRetryInterval);
-      this.currentBackendRetryInterval *= 2;
-      this.currentBackendRetryInterval = Math.min(this.currentBackendRetryInterval, 60);
+    } finally {
+      diskCache.unlock();
     }
   }
 
@@ -193,14 +221,14 @@ class Server {
     try {
       await fundingTxFetcher.$init();
       await networkSyncService.$startService();
-      await forensicsService.$startService();
       await lightningStatsUpdater.$startService();
+      await forensicsService.$startService();
     } catch(e) {
-      logger.err(`Nodejs lightning backend crashed. Restarting in 1 minute. Reason: ${(e instanceof Error ? e.message : e)}`);
+      logger.err(`Exception in $runLightningBackend. Restarting in 1 minute. Reason: ${(e instanceof Error ? e.message : e)}`);
       await Common.sleep$(1000 * 60);
       this.$runLightningBackend();
     };
-}
+  }
 
   setUpWebsocketHandling(): void {
     if (this.wss) {
@@ -218,10 +246,10 @@ class Server {
     websocketHandler.setupConnectionHandling();
     if (config.MEMPOOL.ENABLED) {
       statistics.setNewStatisticsEntryCallback(websocketHandler.handleNewStatistic.bind(websocketHandler));
-      memPool.setAsyncMempoolChangedCallback(websocketHandler.handleMempoolChange.bind(websocketHandler));
+      memPool.setAsyncMempoolChangedCallback(websocketHandler.$handleMempoolChange.bind(websocketHandler));
       blocks.setNewAsyncBlockCallback(websocketHandler.handleNewBlock.bind(websocketHandler));
     }
-    fiatConversion.setProgressChangedCallback(websocketHandler.handleNewConversionRates.bind(websocketHandler));
+    priceUpdater.setRatesChangedCallback(websocketHandler.handleNewConversionRates.bind(websocketHandler));
     loadingIndicators.setProgressChangedCallback(websocketHandler.handleLoadingChanged.bind(websocketHandler));
   }
   
@@ -245,6 +273,26 @@ class Server {
       channelsRoutes.initRoutes(this.app);
     }
   }
+
+  healthCheck(): void {
+    const now = Date.now();
+    const stats = v8.getHeapStatistics();
+    this.maxHeapSize = Math.max(stats.used_heap_size, this.maxHeapSize);
+    const warnThreshold = 0.8 * stats.heap_size_limit;
+
+    const byteUnits = getBytesUnit(Math.max(this.maxHeapSize, stats.heap_size_limit));
+
+    if (!this.warnedHeapCritical && this.maxHeapSize > warnThreshold) {
+      this.warnedHeapCritical = true;
+      logger.warn(`Used ${(this.maxHeapSize / stats.heap_size_limit * 100).toFixed(2)}% of heap limit (${formatBytes(this.maxHeapSize, byteUnits, true)} / ${formatBytes(stats.heap_size_limit, byteUnits)})!`);
+    }
+    if (this.lastHeapLogTime === null || (now - this.lastHeapLogTime) > (this.heapLogInterval * 1000)) {
+      logger.debug(`Memory usage: ${formatBytes(this.maxHeapSize, byteUnits)} / ${formatBytes(stats.heap_size_limit, byteUnits)}`);
+      this.warnedHeapCritical = false;
+      this.maxHeapSize = 0;
+      this.lastHeapLogTime = now;
+    }
+  }
 }
 
 ((): Server => new Server())();

backend/src/indexer.ts

@@ -3,45 +3,102 @@ 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';
+import config from './config';
+import auditReplicator from './replication/AuditReplication';
+
+export interface CoreIndex {
+  name: string;
+  synced: boolean;
+  best_block_height: number;
+}
 
 class Indexer {
   runIndexer = true;
   indexerRunning = false;
   tasksRunning: string[] = [];
+  coreIndexes: CoreIndex[] = [];
 
-  public reindex() {
+  /**
+   * Check which core index is available for indexing
+   */
+  public async checkAvailableCoreIndexes(): Promise<void> {
+    const updatedCoreIndexes: CoreIndex[] = [];
+
+    const indexes: any = await bitcoinClient.getIndexInfo();
+    for (const indexName in indexes) {
+      const newState = {
+        name: indexName,
+        synced: indexes[indexName].synced,
+        best_block_height: indexes[indexName].best_block_height,
+      };
+      logger.info(`Core index '${indexName}' is ${indexes[indexName].synced ? 'synced' : 'not synced'}. Best block height is ${indexes[indexName].best_block_height}`);      
+      updatedCoreIndexes.push(newState);
+
+      if (indexName === 'coinstatsindex' && newState.synced === true) {
+        const previousState = this.isCoreIndexReady('coinstatsindex');
+        // if (!previousState || previousState.synced === false) {
+          this.runSingleTask('coinStatsIndex');
+        // }
+      }
+    }
+
+    this.coreIndexes = updatedCoreIndexes;
+  }
+
+  /**
+   * Return the best block height if a core index is available, or 0 if not
+   * 
+   * @param name 
+   * @returns 
+   */
+  public isCoreIndexReady(name: string): CoreIndex | null {
+    for (const index of this.coreIndexes) {
+      if (index.name === name && index.synced === true) {
+        return index;
+      }
+    }
+    return null;
+  }
+
+  public reindex(): void {
     if (Common.indexingEnabled()) {
       this.runIndexer = true;
     }
   }
 
-  public async runSingleTask(task: 'blocksPrices') {
+  public async runSingleTask(task: 'blocksPrices' | 'coinStatsIndex'): Promise<void> {
     if (!Common.indexingEnabled()) {
       return;
     }
 
-    if (task === 'blocksPrices' && !this.tasksRunning.includes(task)) {
+    if (task === 'blocksPrices' && !this.tasksRunning.includes(task) && !['testnet', 'signet'].includes(config.MEMPOOL.NETWORK)) {
       this.tasksRunning.push(task);
       const lastestPriceId = await PricesRepository.$getLatestPriceId();
       if (priceUpdater.historyInserted === false || lastestPriceId === null) {
-        logger.debug(`Blocks prices indexer is waiting for the price updater to complete`)
+        logger.debug(`Blocks prices indexer is waiting for the price updater to complete`, logger.tags.mining);
         setTimeout(() => {
-          this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask != task)
+          this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask !== task);
           this.runSingleTask('blocksPrices');
         }, 10000);
       } else {
-        logger.debug(`Blocks prices indexer will run now`)
+        logger.debug(`Blocks prices indexer will run now`, logger.tags.mining);
         await mining.$indexBlockPrices();
-        this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask != task)
+        this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask !== task);
       }
     }
+
+    if (task === 'coinStatsIndex' && !this.tasksRunning.includes(task)) {
+      this.tasksRunning.push(task);
+      logger.debug(`Indexing coinStatsIndex now`);
+      await mining.$indexCoinStatsIndex();
+      this.tasksRunning = this.tasksRunning.filter(runningTask => runningTask !== task);
+    }
   }
 
-  public async $run() {
+  public async $run(): Promise<void> {
     if (!Common.indexingEnabled() || this.runIndexer === false ||
       this.indexerRunning === true || mempool.hasPriority()
     ) {
@@ -59,13 +116,15 @@ class Indexer {
 
     logger.debug(`Running mining indexer`);
 
+    await this.checkAvailableCoreIndexes();
+
     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.`);
+        logger.warn(`The chain of block hash is invalid, re-indexing invalid data in 10 seconds.`, logger.tags.mining);
         setTimeout(() => this.reindex(), 10000);
         this.indexerRunning = false;
         return;
@@ -73,11 +132,12 @@ class Indexer {
 
       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();
+      await blocks.$generateAuditStats();
+      await auditReplicator.$sync();
     } catch (e) {
       this.indexerRunning = false;
       logger.err(`Indexer failed, trying again in 10 seconds. Reason: ` + (e instanceof Error ? e.message : e));
@@ -92,16 +152,6 @@ class Indexer {
     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

@@ -32,22 +32,27 @@ class Logger {
     local7: 23
   };
 
+  public tags = {
+    mining: 'Mining',
+    ln: 'Lightning',
+  };  
+
   // @ts-ignore
-  public emerg: ((msg: string) => void);
+  public emerg: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public alert: ((msg: string) => void);
+  public alert: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public crit: ((msg: string) => void);
+  public crit: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public err: ((msg: string) => void);
+  public err: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public warn: ((msg: string) => void);
+  public warn: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public notice: ((msg: string) => void);
+  public notice: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public info: ((msg: string) => void);
+  public info: ((msg: string, tag?: string) => void);
   // @ts-ignore
-  public debug: ((msg: string) => void);
+  public debug: ((msg: string, tag?: string) => void);
 
   private name = 'mempool';
   private client: dgram.Socket;
@@ -64,10 +69,14 @@ class Logger {
     this.network = this.getNetwork();
   }
 
+  public updateNetwork(): void {
+    this.network = this.getNetwork();
+  }
+
   private addprio(prio): void {
     this[prio] = (function(_this) {
-      return function(msg) {
-        return _this.msg(prio, msg);
+      return function(msg, tag?: string) {
+        return _this.msg(prio, msg, tag);
       };
     })(this);
   }
@@ -85,7 +94,7 @@ class Logger {
     return '';
   }
 
-  private msg(priority, msg) {
+  private msg(priority, msg, tag?: string) {
     let consolemsg, prionum, syslogmsg;
     if (typeof msg === 'string' && msg.length > 0) {
       while (msg[msg.length - 1].charCodeAt(0) === 10) {
@@ -94,10 +103,10 @@ class Logger {
     }
     const network = this.network ? ' <' + this.network + '>' : '';
     prionum = Logger.priorities[priority] || Logger.priorities.info;
-    consolemsg = `${this.ts()} [${process.pid}] ${priority.toUpperCase()}:${network} ${msg}`;
+    consolemsg = `${this.ts()} [${process.pid}] ${priority.toUpperCase()}:${network} ${tag ? '[' + tag + '] ' : ''}${msg}`;
 
     if (config.SYSLOG.ENABLED && Logger.priorities[priority] <= Logger.priorities[config.SYSLOG.MIN_PRIORITY]) {
-      syslogmsg = `<${(Logger.facilities[config.SYSLOG.FACILITY] * 8 + prionum)}> ${this.name}[${process.pid}]: ${priority.toUpperCase()}${network} ${msg}`;
+      syslogmsg = `<${(Logger.facilities[config.SYSLOG.FACILITY] * 8 + prionum)}> ${this.name}[${process.pid}]: ${priority.toUpperCase()}${network} ${tag ? '[' + tag + '] ' : ''}${msg}`;
       this.syslog(syslogmsg);
     }
     if (Logger.priorities[priority] > Logger.priorities[config.MEMPOOL.STDOUT_LOG_MIN_PRIORITY]) {

backend/src/mempool.interfaces.ts

@@ -1,8 +1,10 @@
 import { IEsploraApi } from './api/bitcoin/esplora-api.interface';
-import { HeapNode } from "./utils/pairing-heap";
+import { OrphanedBlock } from './api/chain-tips';
+import { HeapNode } from './utils/pairing-heap';
 
 export interface PoolTag {
-  id: number; // mysql row id
+  id: number;
+  uniqueId: number;
   name: string;
   link: string;
   regexes: string; // JSON array
@@ -16,6 +18,8 @@ export interface PoolInfo {
   link: string;
   blockCount: number;
   slug: string;
+  avgMatchRate: number | null;
+  avgFeeDelta: number | null;
 }
 
 export interface PoolStats extends PoolInfo {
@@ -29,13 +33,19 @@ export interface BlockAudit {
   hash: string,
   missingTxs: string[],
   freshTxs: string[],
+  sigopTxs: string[],
+  fullrbfTxs: string[],
   addedTxs: string[],
   matchRate: number,
+  expectedFees?: number,
+  expectedWeight?: number,
 }
 
 export interface AuditScore {
   hash: string,
   matchRate?: number,
+  expectedFees?: number
+  expectedWeight?: number
 }
 
 export interface MempoolBlock {
@@ -55,6 +65,7 @@ export interface MempoolBlockWithTransactions extends MempoolBlock {
 export interface MempoolBlockDelta {
   added: TransactionStripped[];
   removed: string[];
+  changed: { txid: string, rate: number | undefined }[];
 }
 
 interface VinStrippedToScriptsig {
@@ -63,6 +74,7 @@ interface VinStrippedToScriptsig {
 
 interface VoutStrippedToScriptPubkey {
   scriptpubkey_address: string | undefined;
+  scriptpubkey_asm: string | undefined;
   value: number;
 }
 
@@ -75,25 +87,65 @@ export interface TransactionExtended extends IEsploraApi.Transaction {
   descendants?: Ancestor[];
   bestDescendant?: BestDescendant | null;
   cpfpChecked?: boolean;
-  deleteAfter?: number;
+  position?: {
+    block: number,
+    vsize: number,
+  };
+  uid?: number;
+}
+
+export interface MempoolTransactionExtended extends TransactionExtended {
+  order: number;
+  sigops: number;
+  adjustedVsize: number;
+  adjustedFeePerVsize: number;
+  inputs?: number[];
+  lastBoosted?: number;
 }
 
 export interface AuditTransaction {
-  txid: string;
+  uid: number;
   fee: number;
-  size: number;
   weight: number;
   feePerVsize: number;
-  vin: IEsploraApi.Vin[];
+  effectiveFeePerVsize: number;
+  sigops: number;
+  inputs: number[];
   relativesSet: boolean;
-  ancestorMap: Map<string, AuditTransaction>;
+  ancestorMap: Map<number, AuditTransaction>;
   children: Set<AuditTransaction>;
   ancestorFee: number;
   ancestorWeight: number;
+  ancestorSigops: number;
   score: number;
   used: boolean;
   modified: boolean;
   modifiedNode: HeapNode<AuditTransaction>;
+  dependencyRate?: number;
+}
+
+export interface CompactThreadTransaction {
+  uid: number;
+  fee: number;
+  weight: number;
+  sigops: number;
+  feePerVsize: number;
+  effectiveFeePerVsize: number;
+  inputs: number[];
+  cpfpRoot?: number;
+  cpfpChecked?: boolean;
+  dirty?: boolean;
+}
+
+export interface ThreadTransaction {
+  txid: string;
+  fee: number;
+  weight: number;
+  feePerVsize: number;
+  effectiveFeePerVsize?: number;
+  inputs: number[];
+  cpfpRoot?: string;
+  cpfpChecked?: boolean;
 }
 
 export interface Ancestor {
@@ -130,28 +182,54 @@ export interface TransactionStripped {
   fee: number;
   vsize: number;
   value: number;
+  rate?: number; // effective fee rate
 }
 
 export interface BlockExtension {
-  totalFees?: number;
-  medianFee?: number;
-  feeRange?: number[];
-  reward?: number;
-  coinbaseTx?: TransactionMinerInfo;
-  matchRate?: number;
-  pool?: {
-    id: number;
+  totalFees: number;
+  medianFee: number; // median fee rate
+  feeRange: number[]; // fee rate percentiles
+  reward: number;
+  matchRate: number | null;
+  expectedFees: number | null;
+  expectedWeight: number | null;
+  similarity?: number;
+  pool: {
+    id: number; // Note - This is the `unique_id`, not to mix with the auto increment `id`
     name: string;
     slug: string;
   };
-  avgFee?: number;
-  avgFeeRate?: number;
-  coinbaseRaw?: string;
-  usd?: number | null;
+  avgFee: number;
+  avgFeeRate: number;
+  coinbaseRaw: string;
+  orphans: OrphanedBlock[] | null;
+  coinbaseAddress: string | null;
+  coinbaseSignature: string | null;
+  coinbaseSignatureAscii: string | null;
+  virtualSize: number;
+  avgTxSize: number;
+  totalInputs: number;
+  totalOutputs: number;
+  totalOutputAmt: number;
+  medianFeeAmt: number | null; // median fee in sats
+  feePercentiles: number[] | null, // fee percentiles in sats
+  segwitTotalTxs: number;
+  segwitTotalSize: number;
+  segwitTotalWeight: number;
+  header: string;
+  utxoSetChange: number;
+  // Requires coinstatsindex, will be set to NULL otherwise
+  utxoSetSize: number | null;
+  totalInputAmt: number | null;
 }
 
+/**
+ * Note: Everything that is added in here will be automatically returned through
+ * /api/v1/block and /api/v1/blocks APIs
+ */
 export interface BlockExtended extends IEsploraApi.Block {
   extras: BlockExtension;
+  canonical?: string;
 }
 
 export interface BlockSummary {
@@ -159,6 +237,15 @@ export interface BlockSummary {
   transactions: TransactionStripped[];
 }
 
+export interface AuditSummary extends BlockAudit {
+  timestamp?: number,
+  size?: number,
+  weight?: number,
+  tx_count?: number,
+  transactions: TransactionStripped[];
+  template?: TransactionStripped[];
+}
+
 export interface BlockPrice {
   height: number;
   priceId: number;
@@ -177,6 +264,28 @@ export interface MempoolStats {
   tx_count: number;
 }
 
+export interface EffectiveFeeStats {
+  medianFee: number; // median effective fee rate
+  feeRange: number[]; // 2nd, 10th, 25th, 50th, 75th, 90th, 98th percentiles
+}
+
+export interface WorkingEffectiveFeeStats extends EffectiveFeeStats {
+  minFee: number;
+  maxFee: number;
+}
+
+export interface CpfpCluster {
+  root: string,
+  height: number,
+  txs: Ancestor[],
+  effectiveFeePerVsize: number,
+}
+
+export interface CpfpSummary {
+  transactions: TransactionExtended[];
+  clusters: CpfpCluster[];
+}
+
 export interface Statistic {
   id?: number;
   added: string;
@@ -257,12 +366,12 @@ interface RequiredParams {
 }
 
 export interface ILoadingIndicators { [name: string]: number; }
-export interface IConversionRates { [currency: string]: number; }
 
 export interface IBackendInfo {
   hostname: string;
   gitCommit: string;
   version: string;
+  lightning: boolean;
 }
 
 export interface IDifficultyAdjustment {
@@ -272,9 +381,11 @@ export interface IDifficultyAdjustment {
   remainingBlocks: number;
   remainingTime: number;
   previousRetarget: number;
+  previousTime: number;
   nextRetargetHeight: number;
   timeAvg: number;
   timeOffset: number;
+  expectedBlocks: number;
 }
 
 export interface IndexedDifficultyAdjustment {
@@ -326,4 +437,4 @@ export interface IOldestNodes {
   updatedAt?: number,
   city?: any,
   country?: any,
-}
+}

backend/src/replication/AuditReplication.ts

@@ -0,0 +1,134 @@
+import DB from '../database';
+import logger from '../logger';
+import { AuditSummary } from '../mempool.interfaces';
+import blocksAuditsRepository from '../repositories/BlocksAuditsRepository';
+import blocksSummariesRepository from '../repositories/BlocksSummariesRepository';
+import { $sync } from './replicator';
+import config from '../config';
+import { Common } from '../api/common';
+import blocks from '../api/blocks';
+
+const BATCH_SIZE = 16;
+
+/**
+ * Syncs missing block template and audit data from trusted servers
+ */
+class AuditReplication {
+  inProgress: boolean = false;
+  skip: Set<string> = new Set();
+
+  public async $sync(): Promise<void> {
+    if (!config.REPLICATION.ENABLED || !config.REPLICATION.AUDIT) {
+      // replication not enabled
+      return;
+    }
+    if (this.inProgress) {
+      logger.info(`AuditReplication sync already in progress`, 'Replication');
+      return;
+    }
+    this.inProgress = true;
+
+    const missingAudits = await this.$getMissingAuditBlocks();
+
+    logger.debug(`Fetching missing audit data for ${missingAudits.length} blocks from trusted servers`, 'Replication');
+    
+    let totalSynced = 0;
+    let totalMissed = 0;
+    let loggerTimer = Date.now();
+    // process missing audits in batches of 
+    for (let i = 0; i < missingAudits.length; i += BATCH_SIZE) {
+      const slice = missingAudits.slice(i, i + BATCH_SIZE);
+      const results = await Promise.all(slice.map(hash => this.$syncAudit(hash)));
+      const synced = results.reduce((total, status) => status ? total + 1 : total, 0);
+      totalSynced += synced;
+      totalMissed += (slice.length - synced);
+      if (Date.now() - loggerTimer > 10000) {
+        loggerTimer = Date.now();
+        logger.info(`Found ${totalSynced} / ${totalSynced + totalMissed} of ${missingAudits.length} missing audits`, 'Replication');
+      }
+      await Common.sleep$(1000);
+    }
+
+    logger.debug(`Fetched ${totalSynced} audits, ${totalMissed} still missing`, 'Replication');
+
+    this.inProgress = false;
+  }
+
+  private async $syncAudit(hash: string): Promise<boolean> {
+    if (this.skip.has(hash)) {
+      // we already know none of our trusted servers have this audit
+      return false;
+    }
+
+    let success = false;
+    // start with a random server so load is uniformly spread
+    const syncResult = await $sync(`/api/v1/block/${hash}/audit-summary`);
+    if (syncResult) {
+      if (syncResult.data?.template?.length) {
+        await this.$saveAuditData(hash, syncResult.data);
+        logger.info(`Imported audit data from ${syncResult.server} for block ${syncResult.data.height} (${hash})`);
+        success = true;
+      }
+      if (!syncResult.data && !syncResult.exists) {
+        this.skip.add(hash);
+      }
+    }
+
+    return success;
+  }
+
+  private async $getMissingAuditBlocks(): Promise<string[]> {
+    try {
+      const startHeight = config.REPLICATION.AUDIT_START_HEIGHT || 0;
+      const [rows]: any[] = await DB.query(`
+        SELECT auditable.hash, auditable.height
+        FROM (
+          SELECT hash, height
+          FROM blocks
+          WHERE height >= ?
+        ) AS auditable
+        LEFT JOIN blocks_audits ON auditable.hash = blocks_audits.hash
+        WHERE blocks_audits.hash IS NULL
+        ORDER BY auditable.height DESC
+      `, [startHeight]);
+      return rows.map(row => row.hash);
+    } catch (e: any) {
+      logger.err(`Cannot fetch missing audit blocks from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  private async $saveAuditData(blockHash: string, auditSummary: AuditSummary): Promise<void> {
+    // save audit & template to DB
+    await blocksSummariesRepository.$saveTemplate({
+      height: auditSummary.height,
+      template: {
+        id: blockHash,
+        transactions: auditSummary.template || []
+      }
+    });
+    await blocksAuditsRepository.$saveAudit({
+      hash: blockHash,
+      height: auditSummary.height,
+      time: auditSummary.timestamp || auditSummary.time,
+      missingTxs: auditSummary.missingTxs || [],
+      addedTxs: auditSummary.addedTxs || [],
+      freshTxs: auditSummary.freshTxs || [],
+      sigopTxs: auditSummary.sigopTxs || [],
+      fullrbfTxs: auditSummary.fullrbfTxs || [],
+      matchRate: auditSummary.matchRate,
+      expectedFees: auditSummary.expectedFees,
+      expectedWeight: auditSummary.expectedWeight,
+    });
+    // add missing data to cached blocks
+    const cachedBlock = blocks.getBlocks().find(block => block.id === blockHash);
+    if (cachedBlock) {
+      cachedBlock.extras.matchRate = auditSummary.matchRate;
+      cachedBlock.extras.expectedFees = auditSummary.expectedFees || null;
+      cachedBlock.extras.expectedWeight = auditSummary.expectedWeight || null;
+    }
+  }
+}
+
+export default new AuditReplication();
+

backend/src/replication/replicator.ts

@@ -0,0 +1,70 @@
+import config from '../config';
+import backendInfo from '../api/backend-info';
+import axios, { AxiosResponse } from 'axios';
+import { SocksProxyAgent } from 'socks-proxy-agent';
+import * as https from 'https';
+
+export async function $sync(path): Promise<{ data?: any, exists: boolean, server?: string }> {
+  // start with a random server so load is uniformly spread
+  let allMissing = true;
+  const offset = Math.floor(Math.random() * config.REPLICATION.SERVERS.length);
+  for (let i = 0; i < config.REPLICATION.SERVERS.length; i++) {
+    const server = config.REPLICATION.SERVERS[(i + offset) % config.REPLICATION.SERVERS.length];
+    // don't query ourself
+    if (server === backendInfo.getBackendInfo().hostname) {
+      continue;
+    }
+    
+    try {
+      const result = await query(`https://${server}${path}`);
+      if (result) {
+        return { data: result, exists: true, server };
+      }
+    } catch (e: any) {
+      if (e?.response?.status === 404) {
+        // this server is also missing this data
+      } else {
+        // something else went wrong
+        allMissing = false;
+      }
+    }
+  }
+
+  return { exists: !allMissing };
+}
+
+export async function query(path): Promise<object> {
+  type axiosOptions = {
+    headers: {
+      'User-Agent': string
+    };
+    timeout: number;
+    httpsAgent?: https.Agent;
+  };
+  const axiosOptions: axiosOptions = {
+    headers: {
+      'User-Agent': (config.MEMPOOL.USER_AGENT === 'mempool') ? `mempool/v${backendInfo.getBackendInfo().version}` : `${config.MEMPOOL.USER_AGENT}`
+    },
+    timeout: config.SOCKS5PROXY.ENABLED ? 30000 : 10000
+  };
+
+  if (config.SOCKS5PROXY.ENABLED) {
+    const socksOptions = {
+      agentOptions: {
+        keepAlive: true,
+      },
+      hostname: config.SOCKS5PROXY.HOST,
+      port: config.SOCKS5PROXY.PORT,
+      username: config.SOCKS5PROXY.USERNAME || 'circuit0',
+      password: config.SOCKS5PROXY.PASSWORD,
+    };
+
+    axiosOptions.httpsAgent = new SocksProxyAgent(socksOptions);
+  }
+
+  const data: AxiosResponse = await axios.get(path, axiosOptions);
+  if (data.statusText === 'error' || !data.data) {
+    throw new Error(`${data.status}`);
+  }
+  return data.data;
+}

backend/src/repositories/BlocksAuditsRepository.ts

@@ -6,20 +6,32 @@ 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]);
+      await DB.query(`INSERT INTO blocks_audits(time, height, hash, missing_txs, added_txs, fresh_txs, sigop_txs, fullrbf_txs, match_rate, expected_fees, expected_weight)
+        VALUE (FROM_UNIXTIME(?), ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`, [audit.time, audit.height, audit.hash, JSON.stringify(audit.missingTxs),
+          JSON.stringify(audit.addedTxs), JSON.stringify(audit.freshTxs), JSON.stringify(audit.sigopTxs), JSON.stringify(audit.fullrbfTxs), audit.matchRate, audit.expectedFees, audit.expectedWeight]);
     } 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> {
+  public async $setSummary(hash: string, expectedFees: number, expectedWeight: number) {
+    try {
+      await DB.query(`
+        UPDATE blocks_audits SET
+        expected_fees = ?,
+        expected_weight = ?
+        WHERE hash = ?
+      `, [expectedFees, expectedWeight, hash]);
+    } catch (e: any) {
+      logger.err(`Cannot update block audit in db. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  public async $getBlocksHealthHistory(div: number, interval: string | null): Promise<any> {
     try {
       let query = `SELECT UNIX_TIMESTAMP(time) as time, height, match_rate FROM blocks_audits`;
 
@@ -32,17 +44,17 @@ class BlocksAuditRepositories {
       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));
+      logger.err(`Cannot fetch blocks health history. Reason: ` + (e instanceof Error ? e.message : e));
       throw e;
     }
   }
 
-  public async $getPredictionsCount(): Promise<number> {
+  public async $getBlocksHealthCount(): 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));
+      logger.err(`Cannot fetch blocks health count. Reason: ` + (e instanceof Error ? e.message : e));
       throw e;
     }
   }
@@ -50,12 +62,18 @@ class BlocksAuditRepositories {
   public async $getBlockAudit(hash: string): Promise<any> {
     try {
       const [rows]: any[] = await DB.query(
-        `SELECT blocks.height, blocks.hash as id, UNIX_TIMESTAMP(blocks.blockTimestamp) as timestamp, blocks.size,
-        blocks.weight, blocks.tx_count,
-        transactions, template, missing_txs as missingTxs, added_txs as addedTxs, fresh_txs as freshTxs, match_rate as matchRate
+        `SELECT blocks_audits.height, blocks_audits.hash as id, UNIX_TIMESTAMP(blocks_audits.time) as timestamp,
+        template,
+        missing_txs as missingTxs,
+        added_txs as addedTxs,
+        fresh_txs as freshTxs,
+        sigop_txs as sigopTxs,
+        fullrbf_txs as fullrbfTxs,
+        match_rate as matchRate,
+        expected_fees as expectedFees,
+        expected_weight as expectedWeight
         FROM blocks_audits
-        JOIN blocks ON blocks.hash = blocks_audits.hash
-        JOIN blocks_summaries ON blocks_summaries.id = blocks_audits.hash
+        JOIN blocks_templates ON blocks_templates.id = blocks_audits.hash
         WHERE blocks_audits.hash = "${hash}"
       `);
       
@@ -63,12 +81,11 @@ class BlocksAuditRepositories {
         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].sigopTxs = JSON.parse(rows[0].sigopTxs);
+        rows[0].fullrbfTxs = JSON.parse(rows[0].fullrbfTxs);
         rows[0].template = JSON.parse(rows[0].template);
 
-        if (rows[0].transactions.length) {
-          return rows[0];
-        }
+        return rows[0];
       }
       return null;
     } catch (e: any) {
@@ -80,7 +97,7 @@ class BlocksAuditRepositories {
   public async $getBlockAuditScore(hash: string): Promise<AuditScore> {
     try {
       const [rows]: any[] = await DB.query(
-        `SELECT hash, match_rate as matchRate
+        `SELECT hash, match_rate as matchRate, expected_fees as expectedFees, expected_weight as expectedWeight
         FROM blocks_audits
         WHERE blocks_audits.hash = "${hash}"
       `);
@@ -94,7 +111,7 @@ class BlocksAuditRepositories {
   public async $getBlockAuditScores(maxHeight: number, minHeight: number): Promise<AuditScore[]> {
     try {
       const [rows]: any[] = await DB.query(
-        `SELECT hash, match_rate as matchRate
+        `SELECT hash, match_rate as matchRate, expected_fees as expectedFees, expected_weight as expectedWeight
         FROM blocks_audits
         WHERE blocks_audits.height BETWEEN ? AND ?
       `, [minHeight, maxHeight]);
@@ -104,6 +121,32 @@ class BlocksAuditRepositories {
       throw e;
     }
   }
+
+  public async $getBlocksWithoutSummaries(): Promise<string[]> {
+    try {
+      const [fromRows]: any[] = await DB.query(`
+        SELECT height
+        FROM blocks_audits
+        WHERE expected_fees IS NULL
+        ORDER BY height DESC
+        LIMIT 1
+      `);
+      if (!fromRows?.length) {
+        return [];
+      }
+      const fromHeight = fromRows[0].height;
+      const [idRows]: any[] = await DB.query(`
+        SELECT hash
+        FROM blocks_audits
+        WHERE height <= ?
+        ORDER BY height DESC
+      `, [fromHeight]);
+      return idRows.map(row => row.hash);
+    } 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

@@ -1,34 +1,140 @@
-import { BlockExtended, BlockPrice } from '../mempool.interfaces';
+import { BlockExtended, BlockExtension, BlockPrice, EffectiveFeeStats } 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';
+import bitcoinClient from '../api/bitcoin/bitcoin-client';
+import config from '../config';
+import chainTips from '../api/chain-tips';
+import blocks from '../api/blocks';
+import BlocksAuditsRepository from './BlocksAuditsRepository';
+
+interface DatabaseBlock {
+  id: string;
+  height: number;
+  version: number;
+  timestamp: number;
+  bits: number;
+  nonce: number;
+  difficulty: number;
+  merkle_root: string;
+  tx_count: number;
+  size: number;
+  weight: number;
+  previousblockhash: string;
+  mediantime: number;
+  totalFees: number;
+  medianFee: number;
+  feeRange: string;
+  reward: number;
+  poolId: number;
+  poolName: string;
+  poolSlug: string;
+  avgFee: number;
+  avgFeeRate: number;
+  coinbaseRaw: string;
+  coinbaseAddress: string;
+  coinbaseSignature: string;
+  coinbaseSignatureAscii: string;
+  avgTxSize: number;
+  totalInputs: number;
+  totalOutputs: number;
+  totalOutputAmt: number;
+  medianFeeAmt: number;
+  feePercentiles: string;
+  segwitTotalTxs: number;
+  segwitTotalSize: number;
+  segwitTotalWeight: number;
+  header: string;
+  utxoSetChange: number;
+  utxoSetSize: number;
+  totalInputAmt: number;
+}
+
+const BLOCK_DB_FIELDS = `
+  blocks.hash AS id,
+  blocks.height,
+  blocks.version,
+  UNIX_TIMESTAMP(blocks.blockTimestamp) AS timestamp,
+  blocks.bits,
+  blocks.nonce,
+  blocks.difficulty,
+  blocks.merkle_root,
+  blocks.tx_count,
+  blocks.size,
+  blocks.weight,
+  blocks.previous_block_hash AS previousblockhash,
+  UNIX_TIMESTAMP(blocks.median_timestamp) AS mediantime,
+  blocks.fees AS totalFees,
+  blocks.median_fee AS medianFee,
+  blocks.fee_span AS feeRange,
+  blocks.reward,
+  pools.unique_id AS poolId,
+  pools.name AS poolName,
+  pools.slug AS poolSlug,
+  blocks.avg_fee AS avgFee,
+  blocks.avg_fee_rate AS avgFeeRate,
+  blocks.coinbase_raw AS coinbaseRaw,
+  blocks.coinbase_address AS coinbaseAddress,
+  blocks.coinbase_signature AS coinbaseSignature,
+  blocks.coinbase_signature_ascii AS coinbaseSignatureAscii,
+  blocks.avg_tx_size AS avgTxSize,
+  blocks.total_inputs AS totalInputs,
+  blocks.total_outputs AS totalOutputs,
+  blocks.total_output_amt AS totalOutputAmt,
+  blocks.median_fee_amt AS medianFeeAmt,
+  blocks.fee_percentiles AS feePercentiles,
+  blocks.segwit_total_txs AS segwitTotalTxs,
+  blocks.segwit_total_size AS segwitTotalSize,
+  blocks.segwit_total_weight AS segwitTotalWeight,
+  blocks.header,
+  blocks.utxoset_change AS utxoSetChange,
+  blocks.utxoset_size AS utxoSetSize,
+  blocks.total_input_amt AS totalInputAmt
+`;
 
 class BlocksRepository {
   /**
    * Save indexed block data in the database
    */
   public async $saveBlockInDatabase(block: BlockExtended) {
+    const truncatedCoinbaseSignature = block?.extras?.coinbaseSignature?.substring(0, 500);
+    const truncatedCoinbaseSignatureAscii = block?.extras?.coinbaseSignatureAscii?.substring(0, 500);
+
     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
+        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,
+        median_timestamp,   header,              coinbase_address,
+        coinbase_signature, utxoset_size,        utxoset_change,    avg_tx_size,
+        total_inputs,       total_outputs,       total_input_amt,   total_output_amt,
+        fee_percentiles,    segwit_total_txs,    segwit_total_size, segwit_total_weight,
+        median_fee_amt,     coinbase_signature_ascii
       ) VALUE (
         ?, ?, FROM_UNIXTIME(?), ?,
         ?, ?, ?, ?,
         ?, ?, ?, ?,
         ?, ?, ?, ?,
-        ?, ?, ?, ?
+        ?, ?, ?, ?,
+        FROM_UNIXTIME(?), ?, ?,
+        ?, ?, ?, ?,
+        ?, ?, ?, ?,
+        ?, ?, ?, ?,
+        ?, ?
       )`;
 
+      const poolDbId = await PoolsRepository.$getPoolByUniqueId(block.extras.pool.id);
+      if (!poolDbId) {
+        throw Error(`Could not find a mining pool with the unique_id = ${block.extras.pool.id}. This error should never be printed.`);
+      }
+
       const params: any[] = [
         block.height,
         block.id,
@@ -38,7 +144,7 @@ class BlocksRepository {
         block.tx_count,
         block.extras.coinbaseRaw,
         block.difficulty,
-        block.extras.pool?.id, // Should always be set to something
+        poolDbId.id,
         block.extras.totalFees,
         JSON.stringify(block.extras.feeRange),
         block.extras.medianFee,
@@ -50,19 +156,89 @@ class BlocksRepository {
         block.previousblockhash,
         block.extras.avgFee,
         block.extras.avgFeeRate,
+        block.mediantime,
+        block.extras.header,
+        block.extras.coinbaseAddress,
+        truncatedCoinbaseSignature,
+        block.extras.utxoSetSize,
+        block.extras.utxoSetChange,
+        block.extras.avgTxSize,
+        block.extras.totalInputs,
+        block.extras.totalOutputs,
+        block.extras.totalInputAmt,
+        block.extras.totalOutputAmt,
+        block.extras.feePercentiles ? JSON.stringify(block.extras.feePercentiles) : null,
+        block.extras.segwitTotalTxs,
+        block.extras.segwitTotalSize,
+        block.extras.segwitTotalWeight,
+        block.extras.medianFeeAmt,
+        truncatedCoinbaseSignatureAscii,
       ];
 
       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 ${block.height} has already been indexed, ignoring`);
+        logger.debug(`$saveBlockInDatabase() - Block ${block.height} has already been indexed, ignoring`, logger.tags.mining);
       } else {
-        logger.err('Cannot save indexed block into db. Reason: ' + (e instanceof Error ? e.message : e));
+        logger.err('Cannot save indexed block into db. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
         throw e;
       }
     }
   }
 
+  /**
+   * Save newly indexed data from core coinstatsindex
+   * 
+   * @param utxoSetSize 
+   * @param totalInputAmt 
+   */
+  public async $updateCoinStatsIndexData(blockHash: string, utxoSetSize: number,
+    totalInputAmt: number
+  ) : Promise<void> {
+    try {
+      const query = `
+        UPDATE blocks
+        SET utxoset_size = ?, total_input_amt = ?
+        WHERE hash = ?
+      `;
+      const params: any[] = [
+        utxoSetSize,
+        totalInputAmt,
+        blockHash
+      ];
+      await DB.query(query, params);
+    } catch (e: any) {
+      logger.err('Cannot update indexed block coinstatsindex. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Update missing fee amounts fields
+   *
+   * @param blockHash 
+   * @param feeAmtPercentiles 
+   * @param medianFeeAmt 
+   */
+  public async $updateFeeAmounts(blockHash: string, feeAmtPercentiles, medianFeeAmt) : Promise<void> {
+    try {
+      const query = `
+        UPDATE blocks
+        SET fee_percentiles = ?, median_fee_amt = ?
+        WHERE hash = ?
+      `;
+      const params: any[] = [
+        JSON.stringify(feeAmtPercentiles),
+        medianFeeAmt,
+        blockHash
+      ];
+      await DB.query(query, params);
+    } catch (e: any) {
+      logger.err(`Cannot update fee amounts for block ${blockHash}. Reason: ' + ${e instanceof Error ? e.message : e}`);
+      throw e;
+    }
+  }
+
   /**
    * Get all block height that have not been indexed between [startHeight, endHeight]
    */
@@ -222,6 +398,55 @@ class BlocksRepository {
     }
   }
 
+  /**
+   * Get average block health for all blocks for a single pool
+   */
+  public async $getAvgBlockHealthPerPoolId(poolId: number): Promise<number | null> {
+    const params: any[] = [];
+    const query = `
+      SELECT AVG(blocks_audits.match_rate) AS avg_match_rate
+      FROM blocks
+      JOIN blocks_audits ON blocks.height = blocks_audits.height
+      WHERE blocks.pool_id = ?
+    `;
+    params.push(poolId);
+
+    try {
+      const [rows] = await DB.query(query, params);
+      if (!rows[0] || rows[0].avg_match_rate == null) {
+        return null;
+      }
+      return Math.round(rows[0].avg_match_rate * 100) / 100;
+    } catch (e) {
+      logger.err(`Cannot get average block health for pool id ${poolId}. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get average block health for all blocks for a single pool
+   */
+  public async $getTotalRewardForPoolId(poolId: number): Promise<number> {
+    const params: any[] = [];
+    const query = `
+      SELECT sum(reward) as total_reward
+      FROM blocks
+      WHERE blocks.pool_id = ?
+    `;
+    params.push(poolId);
+
+    try {
+      const [rows] = await DB.query(query, params);
+      if (!rows[0] || !rows[0].total_reward) {
+        return 0;
+      }
+      return rows[0].total_reward;
+    } catch (e) {
+      logger.err(`Cannot get total reward for pool id ${poolId}. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   /**
    * Get the oldest indexed block
    */
@@ -248,34 +473,17 @@ class BlocksRepository {
   /**
    * Get blocks mined by a specific mining pool
    */
-  public async $getBlocksByPool(slug: string, startHeight?: number): Promise<object[]> {
+  public async $getBlocksByPool(slug: string, startHeight?: number): Promise<BlockExtended[]> {
     const pool = await PoolsRepository.$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
+    let query = `
+      SELECT ${BLOCK_DB_FIELDS}
       FROM blocks
+      JOIN pools ON blocks.pool_id = pools.id
       WHERE pool_id = ?`;
     params.push(pool.id);
 
@@ -288,11 +496,11 @@ class BlocksRepository {
       LIMIT 10`;
 
     try {
-      const [rows] = await DB.query(query, params);
+      const [rows]: any[] = await DB.query(query, params);
 
       const blocks: BlockExtended[] = [];
-      for (const block of <object[]>rows) {
-        blocks.push(prepareBlock(block));
+      for (const block of rows) {
+        blocks.push(await this.formatDbBlockIntoExtendedBlock(block as DatabaseBlock));
       }
 
       return blocks;
@@ -305,80 +513,27 @@ class BlocksRepository {
   /**
    * Get one block by height
    */
-  public async $getBlockByHeight(height: number): Promise<object | null> {
+  public async $getBlockByHeight(height: number): Promise<BlockExtended | 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
+      const [rows]: any[] = await DB.query(`
+        SELECT ${BLOCK_DB_FIELDS}
         FROM blocks
         JOIN pools ON blocks.pool_id = pools.id
-        WHERE blocks.height = ${height}
-      `);
+        WHERE blocks.height = ?`,
+        [height]
+      );
 
       if (rows.length <= 0) {
         return null;
       }
 
-      rows[0].fee_span = JSON.parse(rows[0].fee_span);
-      return rows[0];
+      return await this.formatDbBlockIntoExtendedBlock(rows[0] as DatabaseBlock);  
     } 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
    */
@@ -422,19 +577,6 @@ class BlocksRepository {
     }
   }
 
-  /**
-   * 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
    */
@@ -463,8 +605,15 @@ class BlocksRepository {
   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`);
+      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;
@@ -481,7 +630,6 @@ class BlocksRepository {
         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;
@@ -501,7 +649,7 @@ class BlocksRepository {
    * Delete blocks from the database from blockHeight
    */
   public async $deleteBlocksFrom(blockHeight: number) {
-    logger.info(`Delete newer blocks from height ${blockHeight} from the database`);
+    logger.info(`Delete newer blocks from height ${blockHeight} from the database`, logger.tags.mining);
 
     try {
       await DB.query(`DELETE FROM blocks where height >= ${blockHeight}`);
@@ -667,18 +815,34 @@ class BlocksRepository {
    */
    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;
+      const blockchainInfo = await bitcoinClient.getBlockchainInfo();
+      const currentBlockHeight = blockchainInfo.blocks;
+      let indexingBlockAmount = Math.min(config.MEMPOOL.INDEXING_BLOCKS_AMOUNT, currentBlockHeight);
+      if (indexingBlockAmount <= -1) {
+        indexingBlockAmount = currentBlockHeight + 1;
+      }
+      const minHeight = Math.max(0, currentBlockHeight - indexingBlockAmount + 1);
+
+      const [rows]: any[] = await DB.query(`
+        SELECT height
+        FROM compact_cpfp_clusters
+        WHERE height <= ? AND height >= ?
+        GROUP BY height
+        ORDER BY height DESC;
+      `, [currentBlockHeight, minHeight]);
+
+      const indexedHeights = {};
+      rows.forEach((row) => { indexedHeights[row.height] = true; });
+      const allHeights: number[] = Array.from(Array(currentBlockHeight - minHeight + 1).keys(), n => n + minHeight).reverse();
+      const unindexedHeights = allHeights.filter(x => !indexedHeights[x]);
+
+      return unindexedHeights;
     } 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
    */
@@ -700,7 +864,7 @@ class BlocksRepository {
   /**
    * Get all blocks which have not be linked to a price yet
    */
-   public async $getBlocksWithoutPrice(): Promise<object[]> {
+  public async $getBlocksWithoutPrice(): Promise<object[]> {
     try {
       const [rows]: any[] = await DB.query(`
         SELECT UNIX_TIMESTAMP(blocks.blockTimestamp) as timestamp, blocks.height
@@ -712,7 +876,7 @@ class BlocksRepository {
       return rows;
     } catch (e) {
       logger.err('Cannot get blocks height and timestamp from the db. Reason: ' + (e instanceof Error ? e.message : e));
-      throw e;
+      return [];
     }
   }
 
@@ -723,7 +887,7 @@ class BlocksRepository {
     try {
       let query = `INSERT INTO blocks_prices(height, price_id) VALUES`;
       for (const price of blockPrices) {
-        query += ` (${price.height}, ${price.priceId}),`
+        query += ` (${price.height}, ${price.priceId}),`;
       }
       query = query.slice(0, -1);
       await DB.query(query);
@@ -732,10 +896,160 @@ class BlocksRepository {
         logger.debug(`Cannot save blocks prices for blocks [${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;
       }
     }
   }
+
+  /**
+   * Get all indexed blocsk with missing coinstatsindex data
+   */
+  public async $getBlocksMissingCoinStatsIndex(maxHeight: number, minHeight: number): Promise<any> {
+    try {
+      const [blocks] = await DB.query(`
+        SELECT height, hash
+        FROM blocks
+        WHERE height >= ${minHeight} AND height <= ${maxHeight} AND
+          (utxoset_size IS NULL OR total_input_amt IS NULL)
+      `);
+      return blocks;
+    } catch (e) {
+      logger.err(`Cannot get blocks with missing coinstatsindex. Reason: ` + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
+
+  /**
+   * Save indexed median fee to avoid recomputing it later
+   * 
+   * @param id 
+   * @param feePercentiles 
+   */
+  public async $saveFeePercentilesForBlockId(id: string, feePercentiles: number[]): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE blocks SET fee_percentiles = ?, median_fee_amt = ?
+        WHERE hash = ?`,
+        [JSON.stringify(feePercentiles), feePercentiles[3], id]
+      );
+    } catch (e) {
+      logger.err(`Cannot update block fee_percentiles. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Save indexed effective fee statistics
+   * 
+   * @param id 
+   * @param feeStats 
+   */
+  public async $saveEffectiveFeeStats(id: string, feeStats: EffectiveFeeStats): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE blocks SET median_fee = ?, fee_span = ?
+        WHERE hash = ?`,
+        [feeStats.medianFee, JSON.stringify(feeStats.feeRange), id]
+      );
+    } catch (e) {
+      logger.err(`Cannot update block fee stats. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Convert a mysql row block into a BlockExtended. Note that you
+   * must provide the correct field into dbBlk object param
+   * 
+   * @param dbBlk 
+   */
+  private async formatDbBlockIntoExtendedBlock(dbBlk: DatabaseBlock): Promise<BlockExtended> {
+    const blk: Partial<BlockExtended> = {};
+    const extras: Partial<BlockExtension> = {};
+
+    // IEsploraApi.Block
+    blk.id = dbBlk.id;
+    blk.height = dbBlk.height;
+    blk.version = dbBlk.version;
+    blk.timestamp = dbBlk.timestamp;
+    blk.bits = dbBlk.bits;
+    blk.nonce = dbBlk.nonce;
+    blk.difficulty = dbBlk.difficulty;
+    blk.merkle_root = dbBlk.merkle_root;
+    blk.tx_count = dbBlk.tx_count;
+    blk.size = dbBlk.size;
+    blk.weight = dbBlk.weight;
+    blk.previousblockhash = dbBlk.previousblockhash;
+    blk.mediantime = dbBlk.mediantime;
+    
+    // BlockExtension
+    extras.totalFees = dbBlk.totalFees;
+    extras.medianFee = dbBlk.medianFee;
+    extras.feeRange = JSON.parse(dbBlk.feeRange);
+    extras.reward = dbBlk.reward;
+    extras.pool = {
+      id: dbBlk.poolId,
+      name: dbBlk.poolName,
+      slug: dbBlk.poolSlug,
+    };
+    extras.avgFee = dbBlk.avgFee;
+    extras.avgFeeRate = dbBlk.avgFeeRate;
+    extras.coinbaseRaw = dbBlk.coinbaseRaw;
+    extras.coinbaseAddress = dbBlk.coinbaseAddress;
+    extras.coinbaseSignature = dbBlk.coinbaseSignature;
+    extras.coinbaseSignatureAscii = dbBlk.coinbaseSignatureAscii;
+    extras.avgTxSize = dbBlk.avgTxSize;
+    extras.totalInputs = dbBlk.totalInputs;
+    extras.totalOutputs = dbBlk.totalOutputs;
+    extras.totalOutputAmt = dbBlk.totalOutputAmt;
+    extras.medianFeeAmt = dbBlk.medianFeeAmt;
+    extras.feePercentiles = JSON.parse(dbBlk.feePercentiles);
+    extras.segwitTotalTxs = dbBlk.segwitTotalTxs;
+    extras.segwitTotalSize = dbBlk.segwitTotalSize;
+    extras.segwitTotalWeight = dbBlk.segwitTotalWeight;
+    extras.header = dbBlk.header,
+    extras.utxoSetChange = dbBlk.utxoSetChange;
+    extras.utxoSetSize = dbBlk.utxoSetSize;
+    extras.totalInputAmt = dbBlk.totalInputAmt;
+    extras.virtualSize = dbBlk.weight / 4.0;
+
+    // Re-org can happen after indexing so we need to always get the
+    // latest state from core
+    extras.orphans = chainTips.getOrphanedBlocksAtHeight(dbBlk.height);
+
+    // Match rate is not part of the blocks table, but it is part of APIs so we must include it
+    extras.matchRate = null;
+    extras.expectedFees = null;
+    extras.expectedWeight = null;
+    if (config.MEMPOOL.AUDIT) {
+      const auditScore = await BlocksAuditsRepository.$getBlockAuditScore(dbBlk.id);
+      if (auditScore != null) {
+        extras.matchRate = auditScore.matchRate;
+        extras.expectedFees = auditScore.expectedFees;
+        extras.expectedWeight = auditScore.expectedWeight;
+      }
+    }
+
+    // If we're missing block summary related field, check if we can populate them on the fly now
+    // This is for example triggered upon re-org
+    if (Common.blocksSummariesIndexingEnabled() &&
+      (extras.medianFeeAmt === null || extras.feePercentiles === null))
+    {
+      extras.feePercentiles = await BlocksSummariesRepository.$getFeePercentilesByBlockId(dbBlk.id);
+      if (extras.feePercentiles === null) {
+        const block = await bitcoinClient.getBlock(dbBlk.id, 2);
+        const summary = blocks.summarizeBlock(block);
+        await BlocksSummariesRepository.$saveTransactions(dbBlk.height, dbBlk.id, summary.transactions);
+        extras.feePercentiles = await BlocksSummariesRepository.$getFeePercentilesByBlockId(dbBlk.id);
+      }
+      if (extras.feePercentiles !== null) {
+        extras.medianFeeAmt = extras.feePercentiles[3];
+        await this.$updateFeeAmounts(dbBlk.id, extras.feePercentiles, extras.medianFeeAmt);
+      }
+    }
+
+    blk.extras = <BlockExtension>extras;
+    return <BlockExtended>blk;
+  }
 }
 
 export default new BlocksRepository();

backend/src/repositories/BlocksSummariesRepository.ts

@@ -1,6 +1,6 @@
 import DB from '../database';
 import logger from '../logger';
-import { BlockSummary } from '../mempool.interfaces';
+import { BlockSummary, TransactionStripped } from '../mempool.interfaces';
 
 class BlocksSummariesRepository {
   public async $getByBlockId(id: string): Promise<BlockSummary | undefined> {
@@ -17,23 +17,17 @@ class BlocksSummariesRepository {
     return undefined;
   }
 
-  public async $saveSummary(params: { height: number, mined?: BlockSummary}) {
-    const blockId = params.mined?.id;
+  public async $saveTransactions(blockHeight: number, blockId: string, transactions: TransactionStripped[]): Promise<void> {
     try {
-      const transactions = JSON.stringify(params.mined?.transactions || []);
+      const transactionsStr = JSON.stringify(transactions);
       await DB.query(`
-        INSERT INTO blocks_summaries (height, id, transactions, template)
-        VALUE (?, ?, ?, ?)
-        ON DUPLICATE KEY UPDATE
-          transactions = ?
-      `, [params.height, blockId, transactions, '[]', transactions]);
+        INSERT INTO blocks_summaries
+        SET height = ?, transactions = ?, id = ?
+        ON DUPLICATE KEY UPDATE transactions = ?`,
+        [blockHeight, transactionsStr, blockId, transactionsStr]);
     } 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;
-      }
+      logger.debug(`Cannot save block summary transactions for ${blockId}. Reason: ${e instanceof Error ? e.message : e}`);
+      throw e;
     }
   }
 
@@ -42,21 +36,35 @@ class BlocksSummariesRepository {
     try {
       const transactions = JSON.stringify(params.template?.transactions || []);
       await DB.query(`
-        INSERT INTO blocks_summaries (height, id, transactions, template)
-        VALUE (?, ?, ?, ?)
+        INSERT INTO blocks_templates (id, template)
+        VALUE (?, ?)
         ON DUPLICATE KEY UPDATE
           template = ?
-      `, [params.height, blockId, '[]', transactions, transactions]);
+      `, [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;
+        logger.warn(`Cannot save block template for ${blockId}. Reason: ${e instanceof Error ? e.message : e}`);
       }
     }
   }
 
+  public async $getTemplate(id: string): Promise<BlockSummary | undefined> {
+    try {
+      const [templates]: any[] = await DB.query(`SELECT * from blocks_templates WHERE id = ?`, [id]);
+      if (templates.length > 0) {
+        return {
+          id: templates[0].id,
+          transactions: JSON.parse(templates[0].template),
+        };
+      }
+    } catch (e) {
+      logger.err(`Cannot get block template for block id ${id}. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+    return undefined;
+  }
+
   public async $getIndexedSummariesId(): Promise<string[]> {
     try {
       const [rows]: any[] = await DB.query(`SELECT id from blocks_summaries`);
@@ -69,15 +77,44 @@ class BlocksSummariesRepository {
   }
 
   /**
-   * Delete blocks from the database from blockHeight
+   * Get the fee percentiles if the block has already been indexed, [] otherwise
+   * 
+   * @param id 
    */
-  public async $deleteBlocksFrom(blockHeight: number) {
-    logger.info(`Delete newer blocks summary from height ${blockHeight} from the database`);
-
+  public async $getFeePercentilesByBlockId(id: string): Promise<number[] | null> {
     try {
-      await DB.query(`DELETE FROM blocks_summaries where height >= ${blockHeight}`);
+      const [rows]: any[] = await DB.query(`
+        SELECT transactions
+        FROM blocks_summaries
+        WHERE id = ?`,
+        [id]
+      );
+      if (rows === null || rows.length === 0) {
+        return null;
+      }
+
+      const transactions = JSON.parse(rows[0].transactions);
+      if (transactions === null) {
+        return null;
+      }
+
+      transactions.shift(); // Ignore coinbase
+      transactions.sort((a: any, b: any) => a.fee - b.fee);
+      const fees = transactions.map((t: any) => t.fee);
+
+      return [
+        fees[0] ?? 0, // min
+        fees[Math.max(0, Math.floor(fees.length * 0.1) - 1)] ?? 0, // 10th
+        fees[Math.max(0, Math.floor(fees.length * 0.25) - 1)] ?? 0, // 25th
+        fees[Math.max(0, Math.floor(fees.length * 0.5) - 1)] ?? 0, // median
+        fees[Math.max(0, Math.floor(fees.length * 0.75) - 1)] ?? 0, // 75th
+        fees[Math.max(0, Math.floor(fees.length * 0.9) - 1)] ?? 0, // 90th
+        fees[fees.length - 1] ?? 0, // max
+      ];
+
     } catch (e) {
-      logger.err('Cannot delete indexed blocks summaries. Reason: ' + (e instanceof Error ? e.message : e));
+      logger.err(`Cannot get block summaries transactions. Reason: ` + (e instanceof Error ? e.message : e));
+      return null;
     }
   }
 }

backend/src/repositories/CpfpRepository.ts

@@ -1,34 +1,117 @@
+import { RowDataPacket } from 'mysql2';
 import DB from '../database';
 import logger from '../logger';
-import { Ancestor } from '../mempool.interfaces';
+import { Ancestor, CpfpCluster } from '../mempool.interfaces';
+import transactionRepository from '../repositories/TransactionRepository';
 
 class CpfpRepository {
-  public async $saveCluster(height: number, txs: Ancestor[], effectiveFeePerVsize: number): Promise<void> {
+  public async $batchSaveClusters(clusters: { root: string, height: number, txs: Ancestor[], effectiveFeePerVsize: number }[]): Promise<boolean> {
     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]
-      );
+      const clusterValues: [string, number, Buffer, number][] = [];
+      const txs: { txid: string, cluster: string }[] = [];
+
+      for (const cluster of clusters) {
+        if (cluster.txs?.length) {
+          const roundedEffectiveFee = Math.round(cluster.effectiveFeePerVsize * 100) / 100;
+          const equalFee = cluster.txs.length > 1 && cluster.txs.reduce((acc, tx) => {
+            return (acc && Math.round(((tx.fee || 0) / (tx.weight / 4)) * 100) / 100 === roundedEffectiveFee);
+          }, true);
+          if (!equalFee) {
+            clusterValues.push([
+              cluster.root,
+              cluster.height,
+              Buffer.from(this.pack(cluster.txs)),
+              cluster.effectiveFeePerVsize
+            ]);
+            for (const tx of cluster.txs) {
+              txs.push({ txid: tx.txid, cluster: cluster.root });
+            }
+          }
+        }
+      }
+
+      if (!clusterValues.length) {
+        return false;
+      }
+
+      const queries: { query, params }[] = [];
+
+      const maxChunk = 100;
+      let chunkIndex = 0;
+      // insert clusters in batches of up to 100 rows
+      while (chunkIndex < clusterValues.length) {
+        const chunk = clusterValues.slice(chunkIndex, chunkIndex + maxChunk);
+        let query = `
+            INSERT IGNORE INTO compact_cpfp_clusters(root, height, txs, fee_rate)
+            VALUES
+        `;
+        query += chunk.map(chunk => {
+          return (' (UNHEX(?), ?, ?, ?)');
+        }) + ';';
+        const values = chunk.flat();
+        queries.push({
+          query,
+          params: values,
+        });
+        chunkIndex += maxChunk;
+      }
+
+      chunkIndex = 0;
+      // insert transactions in batches of up to 100 rows
+      while (chunkIndex < txs.length) {
+        const chunk = txs.slice(chunkIndex, chunkIndex + maxChunk);
+        queries.push(transactionRepository.buildBatchSetQuery(chunk));
+        chunkIndex += maxChunk;
+      }
+
+      await DB.$atomicQuery(queries);
+
+      return true;
     } catch (e: any) {
-      logger.err(`Cannot save cpfp cluster into db. Reason: ` + (e instanceof Error ? e.message : e));
+      logger.err(`Cannot save cpfp clusters into db. Reason: ` + (e instanceof Error ? e.message : e));
       throw e;
     }
   }
 
+  public async $getCluster(clusterRoot: string): Promise<CpfpCluster | void> {
+    const [clusterRows]: any = await DB.query(
+      `
+        SELECT *
+        FROM compact_cpfp_clusters
+        WHERE root = UNHEX(?)
+      `,
+      [clusterRoot]
+    );
+    const cluster = clusterRows[0];
+    if (cluster?.txs) {
+      cluster.effectiveFeePerVsize = cluster.fee_rate;
+      cluster.txs = this.unpack(cluster.txs);
+      return cluster;
+    }
+    return;
+  }
+
   public async $deleteClustersFrom(height: number): Promise<void> {
     logger.info(`Delete newer cpfp clusters from height ${height} from the database`);
     try {
+      const [rows] = await DB.query(
+        `
+          SELECT txs, height, root from compact_cpfp_clusters
+          WHERE height >= ?
+        `,
+        [height]
+      ) as RowDataPacket[][];
+      if (rows?.length) {
+        for (const clusterToDelete of rows) {
+          const txs = this.unpack(clusterToDelete?.txs);
+          for (const tx of txs) {
+            await transactionRepository.$removeTransaction(tx.txid);
+          }
+        }
+      }
       await DB.query(
         `
-          DELETE from cpfp_clusters
+          DELETE from compact_cpfp_clusters
           WHERE height >= ?
         `,
         [height]
@@ -38,6 +121,75 @@ class CpfpRepository {
       throw e;
     }
   }
+
+  // insert a dummy row to mark that we've indexed as far as this block
+  public async $insertProgressMarker(height: number): Promise<void> {
+    try {
+      const [rows]: any = await DB.query(
+        `
+          SELECT root
+          FROM compact_cpfp_clusters
+          WHERE height = ?
+        `,
+        [height]
+      );
+      if (!rows?.length) {
+        const rootBuffer = Buffer.alloc(32);
+        rootBuffer.writeInt32LE(height);
+        await DB.query(
+          `
+            INSERT INTO compact_cpfp_clusters(root, height, fee_rate)
+            VALUE (?, ?, ?)
+          `,
+          [rootBuffer, height, 0]
+        );
+      }
+    } catch (e: any) {
+      logger.err(`Cannot insert cpfp progress marker. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  public pack(txs: Ancestor[]): ArrayBuffer {
+    const buf = new ArrayBuffer(44 * txs.length);
+    const view = new DataView(buf);
+    txs.forEach((tx, i) => {
+      const offset = i * 44;
+      for (let x = 0; x < 32; x++) {
+        // store txid in little-endian
+        view.setUint8(offset + (31 - x), parseInt(tx.txid.slice(x * 2, (x * 2) + 2), 16));
+      }
+      view.setUint32(offset + 32, tx.weight);
+      view.setBigUint64(offset + 36, BigInt(Math.round(tx.fee)));
+    });
+    return buf;
+  }
+
+  public unpack(buf: Buffer): Ancestor[] {
+    if (!buf) {
+      return [];
+    }
+
+    try {
+      const arrayBuffer = buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+      const txs: Ancestor[] = [];
+      const view = new DataView(arrayBuffer);
+      for (let offset = 0; offset < arrayBuffer.byteLength; offset += 44) {
+        const txid = Array.from(new Uint8Array(arrayBuffer, offset, 32)).reverse().map(b => b.toString(16).padStart(2, '0')).join('');
+        const weight = view.getUint32(offset + 32);
+        const fee = Number(view.getBigUint64(offset + 36));
+        txs.push({
+          txid,
+          weight,
+          fee
+        });
+      }
+      return txs;
+    } catch (e) {
+      logger.warn(`Failed to unpack CPFP cluster. Reason: ` + (e instanceof Error ? e.message : e));
+      return [];
+    }
+  }
 }
 
 export default new CpfpRepository();

backend/src/repositories/DifficultyAdjustmentsRepository.ts

@@ -1,5 +1,4 @@
 import { Common } from '../api/common';
-import config from '../config';
 import DB from '../database';
 import logger from '../logger';
 import { IndexedDifficultyAdjustment } from '../mempool.interfaces';
@@ -21,9 +20,9 @@ class DifficultyAdjustmentsRepository {
       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`);
+        logger.debug(`Cannot save difficulty adjustment at block ${adjustment.height}, already indexed, ignoring`, logger.tags.mining);
       } else {
-        logger.err(`Cannot save difficulty adjustment at block ${adjustment.height}. Reason: ${e instanceof Error ? e.message : e}`);
+        logger.err(`Cannot save difficulty adjustment at block ${adjustment.height}. Reason: ${e instanceof Error ? e.message : e}`, logger.tags.mining);
         throw e;
       }
     }
@@ -55,7 +54,7 @@ class DifficultyAdjustmentsRepository {
       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));
+      logger.err(`Cannot get difficulty adjustments from the database. Reason: ` + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -84,7 +83,7 @@ class DifficultyAdjustmentsRepository {
       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));
+      logger.err(`Cannot get difficulty adjustments from the database. Reason: ` + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -94,27 +93,27 @@ class DifficultyAdjustmentsRepository {
       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}`);
+      logger.err(`Cannot get difficulty adjustment block heights. Reason: ${e instanceof Error ? e.message : e}`, logger.tags.mining);
       throw e;
     }
   }
 
   public async $deleteAdjustementsFromHeight(height: number): Promise<void> {
     try {
-      logger.info(`Delete newer difficulty adjustments from height ${height} from the database`);
+      logger.info(`Delete newer difficulty adjustments from height ${height} from the database`, logger.tags.mining);
       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}`);
+      logger.err(`Cannot delete difficulty adjustments from the database. Reason: ${e instanceof Error ? e.message : e}`, logger.tags.mining);
       throw e;
     }
   }
 
   public async $deleteLastAdjustment(): Promise<void> {
     try {
-      logger.info(`Delete last difficulty adjustment from the database`);
+      logger.info(`Delete last difficulty adjustment from the database`, logger.tags.mining);
       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}`);
+      logger.err(`Cannot delete last difficulty adjustment from the database. Reason: ${e instanceof Error ? e.message : e}`, logger.tags.mining);
       throw e;
     }
   }

backend/src/repositories/HashratesRepository.ts

@@ -1,5 +1,6 @@
 import { escape } from 'mysql2';
 import { Common } from '../api/common';
+import mining from '../api/mining/mining';
 import DB from '../database';
 import logger from '../logger';
 import PoolsRepository from './PoolsRepository';
@@ -24,7 +25,7 @@ class HashratesRepository {
     try {
       await DB.query(query);
     } catch (e: any) {
-      logger.err('Cannot save indexed hashrate into db. Reason: ' + (e instanceof Error ? e.message : e));
+      logger.err('Cannot save indexed hashrate into db. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -50,7 +51,7 @@ class HashratesRepository {
       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));
+      logger.err('Cannot fetch network hashrate history. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -77,7 +78,7 @@ class HashratesRepository {
       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));
+      logger.err('Cannot fetch network hashrate history. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -92,7 +93,7 @@ class HashratesRepository {
       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));
+      logger.err('Cannot retreive indexed weekly hashrate timestamps. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -127,7 +128,7 @@ class HashratesRepository {
       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));
+      logger.err('Cannot fetch weekly pools hashrate history. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -157,7 +158,7 @@ class HashratesRepository {
       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));
+      logger.err('Cannot fetch hashrate start/end timestamps for this pool. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
     }
 
     // Get hashrates entries between boundaries
@@ -172,21 +173,7 @@ class HashratesRepository {
       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));
+      logger.err('Cannot fetch pool hashrate history for this pool. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -205,7 +192,7 @@ class HashratesRepository {
       }
       return rows[0]['number'];
     } catch (e) {
-      logger.err(`Cannot retrieve last indexing run for ${key}. Reason: ` + (e instanceof Error ? e.message : e));
+      logger.err(`Cannot retrieve last indexing run for ${key}. Reason: ` + (e instanceof Error ? e.message : e), logger.tags.mining);
       throw e;
     }
   }
@@ -214,7 +201,7 @@ class HashratesRepository {
    * Delete most recent data points for re-indexing
    */
   public async $deleteLastEntries() {
-    logger.info(`Delete latest hashrates data points from the database`);
+    logger.info(`Delete latest hashrates data points from the database`, logger.tags.mining);
 
     try {
       const [rows]: any[] = await DB.query(`SELECT MAX(hashrate_timestamp) as timestamp FROM hashrates GROUP BY type`);
@@ -222,10 +209,10 @@ class HashratesRepository {
         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);
+      mining.lastHashrateIndexingDate = null;
+      mining.lastWeeklyHashrateIndexingDate = null;
     } catch (e) {
-      logger.err('Cannot delete latest hashrates data points. Reason: ' + (e instanceof Error ? e.message : e));
+      logger.err('Cannot delete latest hashrates data points. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
     }
   }
   
@@ -233,15 +220,15 @@ class HashratesRepository {
    * 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`);
+    logger.info(`Delete newer hashrates from timestamp ${new Date(timestamp * 1000).toUTCString()} from the database`, logger.tags.mining);
 
     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);
+      mining.lastHashrateIndexingDate = null;
+      mining.lastWeeklyHashrateIndexingDate = null;
     } catch (e) {
-      logger.err('Cannot delete latest hashrates data points. Reason: ' + (e instanceof Error ? e.message : e));
+      logger.err('Cannot delete latest hashrates data points. Reason: ' + (e instanceof Error ? e.message : e), logger.tags.mining);
     }
   }
 }

backend/src/repositories/PoolsRepository.ts

@@ -1,4 +1,5 @@
 import { Common } from '../api/common';
+import poolsParser from '../api/pools-parser';
 import config from '../config';
 import DB from '../database';
 import logger from '../logger';
@@ -9,7 +10,7 @@ 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;');
+    const [rows] = await DB.query('SELECT id, unique_id as uniqueId, name, addresses, regexes, slug FROM pools');
     return <PoolTag[]>rows;
   }
 
@@ -17,7 +18,11 @@ class PoolsRepository {
    * Get unknown pool tagging info
    */
   public async $getUnknownPool(): Promise<PoolTag> {
-    const [rows] = await DB.query('SELECT id, name, slug FROM pools where name = "Unknown"');
+    let [rows]: any[] = await DB.query('SELECT id, unique_id as uniqueId, name, slug FROM pools where name = "Unknown"');
+    if (rows && rows.length === 0 && config.DATABASE.ENABLED) {
+      await poolsParser.$insertUnknownPool();
+      [rows] = await DB.query('SELECT id, unique_id as uniqueId, name, slug FROM pools where name = "Unknown"');
+    }
     return <PoolTag>rows[0];
   }
 
@@ -27,16 +32,26 @@ class PoolsRepository {
   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
+    let query = `
+      SELECT
+        COUNT(blocks.height) As blockCount,
+          pool_id AS poolId,
+          pools.name AS name,
+          pools.link AS link,
+          slug,
+          AVG(blocks_audits.match_rate) AS avgMatchRate,
+          AVG((CAST(blocks.fees as SIGNED) - CAST(blocks_audits.expected_fees as SIGNED)) / NULLIF(CAST(blocks_audits.expected_fees as SIGNED), 0)) AS avgFeeDelta
       FROM blocks
-      JOIN pools on pools.id = pool_id`;
+      JOIN pools on pools.id = pool_id
+      LEFT JOIN blocks_audits ON blocks_audits.height = blocks.height
+    `;
 
     if (interval) {
       query += ` WHERE blocks.blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
     }
 
     query += ` GROUP BY pool_id
-      ORDER BY COUNT(height) DESC`;
+      ORDER BY COUNT(blocks.height) DESC`;
 
     try {
       const [rows] = await DB.query(query);
@@ -50,7 +65,7 @@ class PoolsRepository {
   /**
    * Get basic pool info and block count between two timestamp
    */
-   public async $getPoolsInfoBetween(from: number, to: number): Promise<PoolInfo[]> {
+  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(?)
@@ -66,9 +81,9 @@ class PoolsRepository {
   }
 
   /**
-   * Get mining pool statistics for one pool
+   * Get a mining pool info
    */
-   public async $getPool(slug: string): Promise<PoolTag | null> {
+  public async $getPool(slug: string, parse: boolean = true): Promise<PoolTag | null> {
     const query = `
       SELECT *
       FROM pools
@@ -81,10 +96,12 @@ class PoolsRepository {
         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 {
+      if (parse) {
+        rows[0].regexes = JSON.parse(rows[0].regexes);
+      }
+      if (['testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK)) {
+        rows[0].addresses = []; // pools-v2.json only contains mainnet addresses
+      } else if (parse) {
         rows[0].addresses = JSON.parse(rows[0].addresses);
       }
 
@@ -94,6 +111,116 @@ class PoolsRepository {
       throw e;
     }
   }
+
+  /**
+   * Get a mining pool info by its unique id
+   */
+  public async $getPoolByUniqueId(id: number, parse: boolean = true): Promise<PoolTag | null> {
+    const query = `
+      SELECT *
+      FROM pools
+      WHERE pools.unique_id = ?`;
+
+    try {
+      const [rows]: any[] = await DB.query(query, [id]);
+
+      if (rows.length < 1) {
+        return null;
+      }
+
+      if (parse) {
+        rows[0].regexes = JSON.parse(rows[0].regexes);
+      }
+      if (['testnet', 'signet', 'regtest'].includes(config.MEMPOOL.NETWORK)) {
+        rows[0].addresses = []; // pools.json only contains mainnet addresses
+      } else if (parse) {
+        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;
+    }
+  }
+
+  /**
+   * Insert a new mining pool in the database
+   * 
+   * @param pool 
+   */
+  public async $insertNewMiningPool(pool: any, slug: string): Promise<void> {
+    try {
+      await DB.query(`
+        INSERT INTO pools
+        SET name = ?, link = ?, addresses = ?, regexes = ?, slug = ?, unique_id = ?`,
+        [pool.name, pool.link, JSON.stringify(pool.addresses), JSON.stringify(pool.regexes), slug, pool.id]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot insert new mining pool into db. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  /**
+   * Rename an existing mining pool
+   * 
+   * @param dbId
+   * @param newSlug
+   * @param newName 
+   */
+  public async $renameMiningPool(dbId: number, newSlug: string, newName: string): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE pools
+        SET slug = ?, name = ?
+        WHERE id = ?`,
+        [newSlug, newName, dbId]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot rename mining pool id ${dbId}. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
+
+  /**
+   * Update an exisiting mining pool link
+   * 
+   * @param dbId 
+   * @param newLink 
+   */
+  public async $updateMiningPoolLink(dbId: number, newLink: string): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE pools
+        SET link = ?
+        WHERE id = ?`,
+        [newLink, dbId]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot update link for mining pool id ${dbId}. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+
+  }
+
+  /**
+   * Update an existing mining pool addresses or coinbase tags
+   * 
+   * @param dbId 
+   * @param addresses 
+   * @param regexes 
+   */
+  public async $updateMiningPoolTags(dbId: number, addresses: string, regexes: string): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE pools
+        SET addresses = ?, regexes = ?
+        WHERE id = ?`,
+        [JSON.stringify(addresses), JSON.stringify(regexes), dbId]
+      );
+    } catch (e: any) {
+      logger.err(`Cannot update mining pool id ${dbId}. Reason: ` + (e instanceof Error ? e.message : e));
+    }
+  }
+
 }
 
 export default new PoolsRepository();

backend/src/repositories/PricesRepository.ts

@@ -1,50 +1,228 @@
 import DB from '../database';
 import logger from '../logger';
-import { Prices } from '../tasks/price-updater';
+import priceUpdater from '../tasks/price-updater';
+
+export interface ApiPrice {
+  time?: number,
+  USD: number,
+  EUR: number,
+  GBP: number,
+  CAD: number,
+  CHF: number,
+  AUD: number,
+  JPY: number,
+}
+const ApiPriceFields = `
+  UNIX_TIMESTAMP(time) as time,
+  USD,
+  EUR,
+  GBP,
+  CAD,
+  CHF,
+  AUD,
+  JPY
+`;
+
+export interface ExchangeRates {
+  USDEUR: number,
+  USDGBP: number,
+  USDCAD: number,
+  USDCHF: number,
+  USDAUD: number,
+  USDJPY: number,
+}
+
+export interface Conversion {
+  prices: ApiPrice[],
+  exchangeRates: ExchangeRates;
+}
+
+export const MAX_PRICES = {
+  USD: 100000000,
+  EUR: 100000000,
+  GBP: 100000000,
+  CAD: 100000000,
+  CHF: 100000000,
+  AUD: 100000000,
+  JPY: 10000000000,
+};
 
 class PricesRepository {
-  public async $savePrices(time: number, prices: Prices): Promise<void> {
+  public async $savePrices(time: number, prices: ApiPrice): 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
+      // Some historical price entries have no USD prices, so we just ignore them to avoid future UX issues
+      // As of today there are only 4 (on 2013-09-05, 2013-0909, 2013-09-12 and 2013-09-26) so that's fine
       return;
     }
 
+    // Sanity check
+    for (const currency of Object.keys(prices)) {
+      if (prices[currency] < -1 || prices[currency] > MAX_PRICES[currency]) { // We use -1 to mark a "missing data, so it's a valid entry"
+        logger.info(`Ignore BTC${currency} price of ${prices[currency]}`);
+        prices[currency] = 0;
+      }
+    }
+    
     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) {
+    } catch (e) {
       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`);
+    const [oldestRow] = await DB.query(`
+      SELECT UNIX_TIMESTAMP(time) AS time
+      FROM prices
+      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`);
+    const [oldestRow] = await DB.query(`
+      SELECT id
+      FROM prices
+      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`);
+    const [oldestRow] = await DB.query(`
+      SELECT UNIX_TIMESTAMP(time) AS time
+      FROM prices
+      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`);
+    const [times] = await DB.query(`
+      SELECT UNIX_TIMESTAMP(time) AS time
+      FROM prices
+      WHERE USD != -1
+      ORDER BY time
+    `);
+    if (!Array.isArray(times)) {
+      return [];
+    }
     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;
+  public async $getPricesTimesAndId(): Promise<{time: number, id: number, USD: number}[]> {
+    const [times] = await DB.query(`
+      SELECT
+        UNIX_TIMESTAMP(time) AS time,
+        id,
+        USD
+      FROM prices
+      ORDER BY time
+    `);
+    return times as {time: number, id: number, USD: number}[];
+  }
+
+  public async $getLatestConversionRates(): Promise<ApiPrice> {
+    const [rates] = await DB.query(`
+      SELECT ${ApiPriceFields}
+      FROM prices
+      ORDER BY time DESC
+      LIMIT 1`
+    );
+
+    if (!Array.isArray(rates) || rates.length === 0) {
+      return priceUpdater.getEmptyPricesObj();
+    }
+    return rates[0] as ApiPrice;
+  }
+
+  public async $getNearestHistoricalPrice(timestamp: number | undefined): Promise<Conversion | null> {
+    try {
+      const [rates] = await DB.query(`
+        SELECT ${ApiPriceFields}
+        FROM prices
+        WHERE UNIX_TIMESTAMP(time) < ?
+        ORDER BY time DESC
+        LIMIT 1`,
+        [timestamp]
+      );
+      if (!Array.isArray(rates)) {
+        throw Error(`Cannot get single historical price from the database`);
+      }
+
+      // Compute fiat exchange rates
+      let latestPrice = rates[0] as ApiPrice;
+      if (!latestPrice || latestPrice.USD === -1) {
+        latestPrice = priceUpdater.getEmptyPricesObj();
+      }
+
+      const computeFx = (usd: number, other: number): number =>
+        Math.round(Math.max(other, 0) / Math.max(usd, 1) * 100) / 100;
+      
+      const exchangeRates: ExchangeRates = {
+        USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
+        USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
+        USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
+        USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
+        USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
+        USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
+      };
+
+      return {
+        prices: rates as ApiPrice[],
+        exchangeRates: exchangeRates
+      };
+    } catch (e) {
+      logger.err(`Cannot fetch single historical prices from the db. Reason ${e instanceof Error ? e.message : e}`);
+      return null;
+    }
+  }
+
+  public async $getHistoricalPrices(): Promise<Conversion | null> {
+    try {
+      const [rates] = await DB.query(`
+        SELECT ${ApiPriceFields}
+        FROM prices
+        ORDER BY time DESC
+      `);
+      if (!Array.isArray(rates)) {
+        throw Error(`Cannot get average historical price from the database`);
+      }
+
+      // Compute fiat exchange rates
+      let latestPrice = rates[0] as ApiPrice;
+      if (latestPrice.USD === -1) {
+        latestPrice = priceUpdater.getEmptyPricesObj();
+      }
+
+      const computeFx = (usd: number, other: number): number =>
+        Math.round(Math.max(other, 0) / Math.max(usd, 1) * 100) / 100;
+      
+      const exchangeRates: ExchangeRates = {
+        USDEUR: computeFx(latestPrice.USD, latestPrice.EUR),
+        USDGBP: computeFx(latestPrice.USD, latestPrice.GBP),
+        USDCAD: computeFx(latestPrice.USD, latestPrice.CAD),
+        USDCHF: computeFx(latestPrice.USD, latestPrice.CHF),
+        USDAUD: computeFx(latestPrice.USD, latestPrice.AUD),
+        USDJPY: computeFx(latestPrice.USD, latestPrice.JPY),
+      };
+
+      return {
+        prices: rates as ApiPrice[],
+        exchangeRates: exchangeRates
+      };
+    } catch (e) {
+      logger.err(`Cannot fetch historical prices from the db. Reason ${e instanceof Error ? e.message : e}`);
+      return null;
+    }
   }
 }
 

backend/src/repositories/TransactionRepository.ts

@@ -1,31 +1,23 @@
 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;
-}
+import cpfpRepository from './CpfpRepository';
 
 class TransactionRepository {
-  public async $setCluster(txid: string, cluster: string): Promise<void> {
+  public async $setCluster(txid: string, clusterRoot: string): Promise<void> {
     try {
       await DB.query(
         `
-          INSERT INTO transactions
+          INSERT INTO compact_transactions
           (
             txid,
             cluster
           )
-          VALUE (?, ?)
+          VALUE (UNHEX(?), UNHEX(?))
           ON DUPLICATE KEY UPDATE
-            cluster = ?
+            cluster = UNHEX(?)
         ;`,
-        [txid, cluster, cluster]
+        [txid, clusterRoot, clusterRoot]
       );
     } catch (e: any) {
       logger.err(`Cannot save transaction cpfp cluster into db. Reason: ` + (e instanceof Error ? e.message : e));
@@ -33,18 +25,55 @@ class TransactionRepository {
     }
   }
 
+  public buildBatchSetQuery(txs: { txid: string, cluster: string }[]): { query, params } {
+    let query = `
+          INSERT IGNORE INTO compact_transactions
+          (
+            txid,
+            cluster
+          )
+          VALUES
+      `;
+    query += txs.map(tx => {
+      return (' (UNHEX(?), UNHEX(?))');
+    }) + ';';
+    const values = txs.map(tx => [tx.txid, tx.cluster]).flat();
+    return {
+      query,
+      params: values,
+    };
+  }
+
+  public async $batchSetCluster(txs): Promise<void> {
+    try {
+      const query = this.buildBatchSetQuery(txs);
+      await DB.query(
+        query.query,
+        query.params,
+      );
+    } catch (e: any) {
+      logger.err(`Cannot save cpfp transactions into db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   public async $getCpfpInfo(txid: string): Promise<CpfpInfo | void> {
     try {
-      let query = `
-        SELECT *
-        FROM transactions
-        LEFT JOIN cpfp_clusters AS cluster ON cluster.root = transactions.cluster
-        WHERE transactions.txid = ?
-      `;
-      const [rows]: any = await DB.query(query, [txid]);
-      if (rows.length) {
-        rows[0].txs = JSON.parse(rows[0].txs) as Ancestor[];
-        return this.convertCpfp(rows[0]);
+      const [txRows]: any = await DB.query(
+        `
+          SELECT HEX(txid) as id, HEX(cluster) as root
+          FROM compact_transactions
+          WHERE txid = UNHEX(?)
+        `,
+        [txid]
+      );
+      if (txRows.length && txRows[0].root != null) {
+        const txid = txRows[0].id.toLowerCase();
+        const clusterId = txRows[0].root.toLowerCase();
+        const cluster = await cpfpRepository.$getCluster(clusterId);
+        if (cluster) {
+          return this.convertCpfp(txid, cluster);
+        }
       }
     } catch (e) {
       logger.err('Cannot get transaction cpfp info from db. Reason: ' + (e instanceof Error ? e.message : e));
@@ -52,12 +81,28 @@ class TransactionRepository {
     }
   }
 
-  private convertCpfp(cpfp: CpfpSummary): CpfpInfo {
+  public async $removeTransaction(txid: string): Promise<void> {
+    try {
+      await DB.query(
+        `
+          DELETE FROM compact_transactions
+          WHERE txid = UNHEX(?)
+        `,
+        [txid]
+      );
+    } catch (e) {
+      logger.warn('Cannot delete transaction cpfp info from db. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  private convertCpfp(txid, cluster): CpfpInfo {
     const descendants: Ancestor[] = [];
     const ancestors: Ancestor[] = [];
     let matched = false;
-    for (const tx of cpfp.txs) {
-      if (tx.txid === cpfp.txid) {
+
+    for (const tx of (cluster?.txs || [])) {
+      if (tx.txid === txid) {
         matched = true;
       } else if (!matched) {
         descendants.push(tx);
@@ -68,7 +113,7 @@ class TransactionRepository {
     return {
       descendants,
       ancestors,
-      effectiveFeePerVsize: cpfp.fee_rate
+      effectiveFeePerVsize: cluster.effectiveFeePerVsize,
     };
   }
 }

backend/src/rpc-api/commands.ts

@@ -88,5 +88,7 @@ module.exports = {
   verifyTxOutProof: 'verifytxoutproof', // bitcoind v0.11.0+
   walletLock: 'walletlock',
   walletPassphrase: 'walletpassphrase',
-  walletPassphraseChange: 'walletpassphrasechange'
-}
+  walletPassphraseChange: 'walletpassphrasechange',
+  getTxoutSetinfo: 'gettxoutsetinfo',
+  getIndexInfo: 'getindexinfo',
+};

backend/src/tasks/lightning/forensics.service.ts

@@ -27,7 +27,7 @@ class ForensicsService {
 
   private async $runTasks(): Promise<void> {
     try {
-      logger.info(`Running forensics scans`);
+      logger.debug(`Running forensics scans`);
 
       if (config.MEMPOOL.BACKEND === 'esplora') {
         await this.$runClosedChannelsForensics(false);
@@ -73,7 +73,7 @@ class ForensicsService {
     let progress = 0;
 
     try {
-      logger.info(`Started running closed channel forensics...`);
+      logger.debug(`Started running closed channel forensics...`);
       let channels;
       if (onlyNewChannels) {
         channels = await channelsApi.$getClosedChannelsWithoutReason();
@@ -152,11 +152,11 @@ class ForensicsService {
         ++progress;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
         if (elapsedSeconds > 10) {
-          logger.info(`Updating channel closed channel forensics ${progress}/${channels.length}`);
+          logger.debug(`Updating channel closed channel forensics ${progress}/${channels.length}`);
           this.loggerTimer = new Date().getTime() / 1000;
         }
       }
-      logger.info(`Closed channels forensics scan complete.`);
+      logger.debug(`Closed channels forensics scan complete.`);
     } catch (e) {
       logger.err('$runClosedChannelsForensics() error: ' + (e instanceof Error ? e.message : e));
     }
@@ -217,7 +217,7 @@ class ForensicsService {
     let progress = 0;
 
     try {
-      logger.info(`Started running open channel forensics...`);
+      logger.debug(`Started running open channel forensics...`);
       const channels = await channelsApi.$getChannelsWithoutSourceChecked();
 
       for (const openChannel of channels) {
@@ -257,7 +257,7 @@ class ForensicsService {
         ++progress;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
         if (elapsedSeconds > 10) {
-          logger.info(`Updating opened channel forensics ${progress}/${channels?.length}`);
+          logger.debug(`Updating opened channel forensics ${progress}/${channels?.length}`);
           this.loggerTimer = new Date().getTime() / 1000;
           this.truncateTempCache();
         }
@@ -266,7 +266,7 @@ class ForensicsService {
         }
       }
 
-      logger.info(`Open channels forensics scan complete.`);
+      logger.debug(`Open channels forensics scan complete.`);
     } catch (e) {
       logger.err('$runOpenedChannelsForensics() error: ' + (e instanceof Error ? e.message : e));
     } finally {

backend/src/tasks/lightning/network-sync.service.ts

@@ -3,7 +3,6 @@ import logger from '../../logger';
 import channelsApi from '../../api/explorer/channels.api';
 import bitcoinApi from '../../api/bitcoin/bitcoin-api-factory';
 import config from '../../config';
-import { IEsploraApi } from '../../api/bitcoin/esplora-api.interface';
 import { ILightningApi } from '../../api/lightning/lightning-api.interface';
 import { $lookupNodeLocation } from './sync-tasks/node-locations';
 import lightningApi from '../../api/lightning/lightning-api-factory';
@@ -23,7 +22,7 @@ class NetworkSyncService {
   constructor() {}
 
   public async $startService(): Promise<void> {
-    logger.info('Starting lightning network sync service');
+    logger.info(`Starting lightning network sync service`, logger.tags.ln);
 
     this.loggerTimer = new Date().getTime() / 1000;
 
@@ -33,11 +32,11 @@ class NetworkSyncService {
   private async $runTasks(): Promise<void> {
     const taskStartTime = Date.now();
     try {
-      logger.info(`Updating nodes and channels`);
+      logger.debug(`Updating nodes and channels`, logger.tags.ln);
 
       const networkGraph = await lightningApi.$getNetworkGraph();
       if (networkGraph.nodes.length === 0 || networkGraph.edges.length === 0) {
-        logger.info(`LN Network graph is empty, retrying in 10 seconds`);
+        logger.info(`LN Network graph is empty, retrying in 10 seconds`, logger.tags.ln);
         setTimeout(() => { this.$runTasks(); }, 10000);
         return;
       }
@@ -55,7 +54,7 @@ class NetworkSyncService {
       }
 
     } catch (e) {
-      logger.err('$runTasks() error: ' + (e instanceof Error ? e.message : e));
+      logger.err(`$runTasks() error: ${e instanceof Error ? e.message : e}`, logger.tags.ln);
     }
 
     setTimeout(() => { this.$runTasks(); }, Math.max(1, (1000 * config.LIGHTNING.GRAPH_REFRESH_INTERVAL) - (Date.now() - taskStartTime)));
@@ -72,15 +71,15 @@ class NetworkSyncService {
     const graphNodesPubkeys: string[] = [];
     for (const node of nodes) {
       const latestUpdated = await channelsApi.$getLatestChannelUpdateForNode(node.pub_key);
-      node.last_update = Math.max(node.last_update, latestUpdated);
+      node.last_update = Math.max(node.last_update ?? 0, latestUpdated);
 
       await nodesApi.$saveNode(node);
       graphNodesPubkeys.push(node.pub_key);
       ++progress;
 
       const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
-      if (elapsedSeconds > 10) {
-        logger.info(`Updating node ${progress}/${nodes.length}`);
+      if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+        logger.debug(`Updating node ${progress}/${nodes.length}`, logger.tags.ln);
         this.loggerTimer = new Date().getTime() / 1000;
       }
 
@@ -106,7 +105,7 @@ class NetworkSyncService {
         deletedRecords += await NodeRecordsRepository.$deleteUnusedRecords(node.pub_key, customRecordTypes);
       }
     }
-    logger.info(`${progress} nodes updated. ${deletedSockets} sockets deleted. ${deletedRecords} custom records deleted.`);
+    logger.debug(`${progress} nodes updated. ${deletedSockets} sockets deleted. ${deletedRecords} custom records deleted.`);
 
     // If a channel if not present in the graph, mark it as inactive
     await nodesApi.$setNodesInactive(graphNodesPubkeys);
@@ -138,18 +137,18 @@ class NetworkSyncService {
         ++progress;
 
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
-        if (elapsedSeconds > 10) {
-          logger.info(`Updating channel ${progress}/${channels.length}`);
+        if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+          logger.debug(`Updating channel ${progress}/${channels.length}`, logger.tags.ln);
           this.loggerTimer = new Date().getTime() / 1000;
         }
       }
 
-      logger.info(`${progress} channels updated`);
+      logger.debug(`${progress} channels updated`, logger.tags.ln);
 
       // If a channel if not present in the graph, mark it as inactive
       await channelsApi.$setChannelsInactive(graphChannelsIds);
     } catch (e) {
-      logger.err(`Cannot update channel list. Reason: ${(e instanceof Error ? e.message : e)}`);
+      logger.err(` Cannot update channel list. Reason: ${(e instanceof Error ? e.message : e)}`, logger.tags.ln);
     }
   }
 
@@ -184,44 +183,52 @@ class NetworkSyncService {
         if (lowest < node.first_seen) {
           const query = `UPDATE nodes SET first_seen = FROM_UNIXTIME(?) WHERE public_key = ?`;
           const params = [lowest, node.public_key];
+          ++updated;
           await DB.query(query, params);
         }
         ++progress;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
-        if (elapsedSeconds > 10) {
-          logger.info(`Updating node first seen date ${progress}/${nodes.length}`);
+        if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+          logger.debug(`Updating node first seen date ${progress}/${nodes.length}`, logger.tags.ln);
           this.loggerTimer = new Date().getTime() / 1000;
-          ++updated;
         }
       }
-      logger.info(`Updated ${updated} node first seen dates`);
+      if (updated > 0) {
+        logger.debug(`Updated ${updated} node first seen dates`, logger.tags.ln);
+      }
     } catch (e) {
-      logger.err('$updateNodeFirstSeen() error: ' + (e instanceof Error ? e.message : e));
+      logger.err(`$updateNodeFirstSeen() error: ${e instanceof Error ? e.message : e}`, logger.tags.ln);
     }
   }
 
   private async $lookUpCreationDateFromChain(): Promise<void> {
     let progress = 0;
 
-    logger.info(`Running channel creation date lookup`);
+    logger.debug(`Running channel creation date lookup`, logger.tags.ln);
     try {
       const channels = await channelsApi.$getChannelsWithoutCreatedDate();
       for (const channel of channels) {
         const transaction = await fundingTxFetcher.$fetchChannelOpenTx(channel.short_id);
+        if (!transaction) {
+          continue;
+        }
         await DB.query(`
           UPDATE channels SET created = FROM_UNIXTIME(?) WHERE channels.id = ?`,
           [transaction.timestamp, channel.id]
         );
         ++progress;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
-        if (elapsedSeconds > 10) {
-          logger.info(`Updating channel creation date ${progress}/${channels.length}`);
+        if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+          logger.debug(`Updating channel creation date ${progress}/${channels.length}`, logger.tags.ln);
           this.loggerTimer = new Date().getTime() / 1000;
         }
       }
-      logger.info(`Updated ${channels.length} channels' creation date`);
+
+      if (channels.length > 0) {
+        logger.debug(`Updated ${channels.length} channels' creation date`, logger.tags.ln);
+      }      
     } catch (e) {
-      logger.err('$lookUpCreationDateFromChain() error: ' + (e instanceof Error ? e.message : e));
+      logger.err(`$lookUpCreationDateFromChain() error: ${e instanceof Error ? e.message : e}`, logger.tags.ln);
     }
   }
 
@@ -230,7 +237,7 @@ class NetworkSyncService {
    * mark that channel as inactive
    */
   private async $deactivateChannelsWithoutActiveNodes(): Promise<void> {
-    logger.info(`Find channels which nodes are offline`);
+    logger.debug(`Find channels which nodes are offline`, logger.tags.ln);
 
     try {
       const result = await DB.query<ResultSetHeader>(`
@@ -253,17 +260,19 @@ class NetworkSyncService {
         `);
 
       if (result[0].changedRows ?? 0 > 0) {
-        logger.info(`Marked ${result[0].changedRows} channels as inactive because they are not linked to any active node`);
-      } else {
-        logger.debug(`Marked ${result[0].changedRows} channels as inactive because they are not linked to any active node`);
+        logger.debug(`Marked ${result[0].changedRows} channels as inactive because they are not linked to any active node`, logger.tags.ln);
       }
     } catch (e) {
-      logger.err('$deactivateChannelsWithoutActiveNodes() error: ' + (e instanceof Error ? e.message : e));
+      logger.err(`$deactivateChannelsWithoutActiveNodes() error: ${e instanceof Error ? e.message : e}`, logger.tags.ln);
     }
   }
 
   private async $scanForClosedChannels(): Promise<void> {
-    if (this.closedChannelsScanBlock === blocks.getCurrentBlockHeight()) {
+    let currentBlockHeight = blocks.getCurrentBlockHeight();
+    if (config.MEMPOOL.ENABLED === false) { // https://github.com/mempool/mempool/issues/3582
+      currentBlockHeight = await bitcoinApi.$getBlockHeightTip();
+    }
+    if (this.closedChannelsScanBlock === currentBlockHeight) {
       logger.debug(`We've already scan closed channels for this block, skipping.`);
       return;
     }
@@ -277,13 +286,13 @@ class NetworkSyncService {
       } else {
         log += ` for the first time`;
       }
-      logger.info(log);
+      logger.debug(`${log}`, logger.tags.ln);
 
       const channels = await channelsApi.$getChannelsByStatus([0, 1]);
       for (const channel of channels) {
         const spendingTx = await bitcoinApi.$getOutspend(channel.transaction_id, channel.transaction_vout);
         if (spendingTx.spent === true && spendingTx.status?.confirmed === true) {
-          logger.debug('Marking channel: ' + channel.id + ' as closed.');
+          logger.debug(`Marking channel: ${channel.id} as closed.`, logger.tags.ln);
           await DB.query(`UPDATE channels SET status = 2, closing_date = FROM_UNIXTIME(?) WHERE id = ?`,
             [spendingTx.status.block_time, channel.id]);
           if (spendingTx.txid && !channel.closing_transaction_id) {
@@ -293,16 +302,16 @@ class NetworkSyncService {
 
         ++progress;
         const elapsedSeconds = Math.round((new Date().getTime() / 1000) - this.loggerTimer);
-        if (elapsedSeconds > 10) {
-          logger.info(`Checking if channel has been closed ${progress}/${channels.length}`);
+        if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+          logger.debug(`Checking if channel has been closed ${progress}/${channels.length}`, logger.tags.ln);
           this.loggerTimer = new Date().getTime() / 1000;
         }
       }
 
-      this.closedChannelsScanBlock = blocks.getCurrentBlockHeight();
-      logger.info(`Closed channels scan completed at block ${this.closedChannelsScanBlock}`);
+      this.closedChannelsScanBlock = currentBlockHeight;
+      logger.debug(`Closed channels scan completed at block ${this.closedChannelsScanBlock}`, logger.tags.ln);
     } catch (e) {
-      logger.err('$scanForClosedChannels() error: ' + (e instanceof Error ? e.message : e));
+      logger.err(`$scanForClosedChannels() error: ${e instanceof Error ? e.message : e}`, logger.tags.ln);
     }
   }
 }

backend/src/tasks/lightning/stats-updater.service.ts

@@ -6,7 +6,7 @@ import { Common } from '../../api/common';
 
 class LightningStatsUpdater {
   public async $startService(): Promise<void> {
-    logger.info('Starting Lightning Stats service');
+    logger.info(`Starting Lightning Stats service`, logger.tags.ln);
 
     await this.$runTasks();
     LightningStatsImporter.$run();
@@ -22,12 +22,15 @@ class LightningStatsUpdater {
    * Update the latest entry for each node every config.LIGHTNING.STATS_REFRESH_INTERVAL seconds
    */
   private async $logStatsDaily(): Promise<void> {
-    const date = new Date();
-    Common.setDateMidnight(date);
-    const networkGraph = await lightningApi.$getNetworkGraph();
-    await LightningStatsImporter.computeNetworkStats(date.getTime() / 1000, networkGraph);
-    
-    logger.info(`Updated latest network stats`);
+    try {
+      const date = new Date();
+      Common.setDateMidnight(date);
+      const networkGraph = await lightningApi.$getNetworkGraph();
+      await LightningStatsImporter.computeNetworkStats(date.getTime() / 1000, networkGraph);
+      logger.debug(`Updated latest network stats`, logger.tags.ln);
+    } catch (e) {
+      logger.err(`Exception in $logStatsDaily. Reason: ${(e instanceof Error ? e.message : e)}`);
+    }
   }
 }
 

backend/src/tasks/lightning/sync-tasks/funding-tx-fetcher.ts

@@ -21,10 +21,10 @@ class FundingTxFetcher {
       try {
         this.fundingTxCache = JSON.parse(await fsPromises.readFile(CACHE_FILE_NAME, 'utf-8'));
       } catch (e) {
-        logger.err(`Unable to parse channels funding txs disk cache. Starting from scratch`);
+        logger.err(`Unable to parse channels funding txs disk cache. Starting from scratch`, logger.tags.ln);
         this.fundingTxCache = {};
       }
-      logger.debug(`Imported ${Object.keys(this.fundingTxCache).length} funding tx amount from the disk cache`);
+      logger.debug(`Imported ${Object.keys(this.fundingTxCache).length} funding tx amount from the disk cache`, logger.tags.ln);
     }
   }
 
@@ -44,33 +44,34 @@ class FundingTxFetcher {
       ++channelProcessed;
 
       let elapsedSeconds = Math.round((new Date().getTime() / 1000) - loggerTimer);
-      if (elapsedSeconds > 10) {
+      if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
         elapsedSeconds = Math.round((new Date().getTime() / 1000) - globalTimer);
         logger.info(`Indexing channels funding tx ${channelProcessed + 1} of ${channelIds.length} ` +
           `(${Math.floor(channelProcessed / channelIds.length * 10000) / 100}%) | ` +
-          `elapsed: ${elapsedSeconds} seconds`
+          `elapsed: ${elapsedSeconds} seconds`,
+          logger.tags.ln
         );
         loggerTimer = new Date().getTime() / 1000;
       }
 
       elapsedSeconds = Math.round((new Date().getTime() / 1000) - cacheTimer);
       if (elapsedSeconds > 60) {
-        logger.debug(`Saving ${Object.keys(this.fundingTxCache).length} funding txs cache into disk`);
+        logger.debug(`Saving ${Object.keys(this.fundingTxCache).length} funding txs cache into disk`, logger.tags.ln);
         fsPromises.writeFile(CACHE_FILE_NAME, JSON.stringify(this.fundingTxCache));
         cacheTimer = new Date().getTime() / 1000;
       }
     }
 
     if (this.channelNewlyProcessed > 0) {
-      logger.info(`Indexed ${this.channelNewlyProcessed} additional channels funding tx`);
-      logger.debug(`Saving ${Object.keys(this.fundingTxCache).length} funding txs cache into disk`);
+      logger.info(`Indexed ${this.channelNewlyProcessed} additional channels funding tx`, logger.tags.ln);
+      logger.debug(`Saving ${Object.keys(this.fundingTxCache).length} funding txs cache into disk`, logger.tags.ln);
       fsPromises.writeFile(CACHE_FILE_NAME, JSON.stringify(this.fundingTxCache));
     }
 
     this.running = false;
   }
   
-  public async $fetchChannelOpenTx(channelId: string): Promise<{timestamp: number, txid: string, value: number}> {
+  public async $fetchChannelOpenTx(channelId: string): Promise<{timestamp: number, txid: string, value: number} | null> {
     channelId = Common.channelIntegerIdToShortId(channelId);
 
     if (this.fundingTxCache[channelId]) {
@@ -101,6 +102,11 @@ class FundingTxFetcher {
     const rawTx = await bitcoinClient.getRawTransaction(txid);
     const tx = await bitcoinClient.decodeRawTransaction(rawTx);
 
+    if (!tx || !tx.vout || tx.vout.length < parseInt(outputIdx, 10) + 1 || tx.vout[outputIdx].value === undefined) {
+      logger.err(`Cannot find blockchain funding tx for channel id ${channelId}. Possible reasons are: bitcoin backend timeout or the channel shortId is not valid`);
+      return null;
+    }
+
     this.fundingTxCache[channelId] = {
       timestamp: block.time,
       txid: txid,

backend/src/tasks/lightning/sync-tasks/node-locations.ts

@@ -14,7 +14,7 @@ export async function $lookupNodeLocation(): Promise<void> {
   let nodesUpdated = 0;
   let geoNamesInserted = 0;
 
-  logger.info(`Running node location updater using Maxmind`);
+  logger.debug(`Running node location updater using Maxmind`, logger.tags.ln);
   try {
     const nodes = await nodesApi.$getAllNodes();
     const lookupCity = await maxmind.open<CityResponse>(config.MAXMIND.GEOLITE2_CITY);
@@ -152,8 +152,8 @@ export async function $lookupNodeLocation(): Promise<void> {
 
           ++progress;
           const elapsedSeconds = Math.round((new Date().getTime() / 1000) - loggerTimer);
-          if (elapsedSeconds > 10) {
-            logger.info(`Updating node location data ${progress}/${nodes.length}`);
+          if (elapsedSeconds > config.LIGHTNING.LOGGER_UPDATE_INTERVAL) {
+            logger.debug(`Updating node location data ${progress}/${nodes.length}`);
             loggerTimer = new Date().getTime() / 1000;
           }
         }
@@ -161,9 +161,7 @@ export async function $lookupNodeLocation(): Promise<void> {
     }
 
     if (nodesUpdated > 0) {
-      logger.info(`${nodesUpdated} nodes maxmind data updated, ${geoNamesInserted} geo names inserted`);
-    } else {
-      logger.debug(`${nodesUpdated} nodes maxmind data updated, ${geoNamesInserted} geo names inserted`);
+      logger.debug(`${nodesUpdated} nodes maxmind data updated, ${geoNamesInserted} geo names inserted`, logger.tags.ln);
     }
   } catch (e) {
     logger.err('$lookupNodeLocation() error: ' + (e instanceof Error ? e.message : e));