Bump version to 0.4.0

cc3736809a Fix memory database configuration enum (thunderbiscuit)

Pull request description:

  The `DatabaseConfig.Memory` enum currently requires a "junk" string argument which is not used when creating the wallet:

  ```rust
  // lib.rs line 24
  pub enum DatabaseConfig {
      Memory { junk: String },
      Sled { config: SledDbConfiguration },
  }

  // lib.rs line 209
  impl Wallet {
      fn new(
          descriptor: String,
          change_descriptor: Option<String>,
          network: Network,
          database_config: DatabaseConfig,
          blockchain_config: BlockchainConfig,
      ) -> Result<Self, BdkError> {
          let any_database_config = match database_config {
              DatabaseConfig::Memory { .. } => AnyDatabaseConfig::Memory(()),
              DatabaseConfig::Sled { config } => AnyDatabaseConfig::Sled(config),
          };
  ```

  Which translates to the udl file like this:
  ```txt
  [Enum]
  interface DatabaseConfig {
    Memory(string junk);
    Sled(SledDbConfiguration config);
  };
  ```

  According to the [docs from uniffi-rs](https://mozilla.github.io/uniffi-rs/udl/enumerations.html) the `interface` here is required because the enums have named fields. But after testing I found that we can declare the udl file like so, and remove the requirement for the `junk` argument:
  ```txt
  [Enum]
  interface DatabaseConfig {
    Memory();
    Sled(SledDbConfiguration config);
  };
  ```

  On the Rust side we then have
  ```rust
  pub enum DatabaseConfig {
      Memory,
      Sled { config: SledDbConfiguration },
  }
  ```

  And the resulting bindings go from (note that the bindings transform the enum into a sealed class rather than a Kotlin enum)
  ```kotlin
  sealed class DatabaseConfig  {

      data class Memory(
          val junk: String
          ) : DatabaseConfig()

      data class Sled(
          val config: SledDbConfiguration
          ) : DatabaseConfig()
  ```
  to
  ```kotlin
  sealed class DatabaseConfig  {
      object Memory : DatabaseConfig()

      data class Sled(
          val config: SledDbConfiguration
          ) : DatabaseConfig()
  ```

  Which makes the API simpler to use, and removes the confusion created by having to provide an empty string (or not know what we're supposed to provide) to the `Memory()` enum.

  The final call-site looks like this:
  ```kotlin
      fun onlineWalletSyncGetBalance() {
          // val db = DatabaseConfig.Memory("")
          val db = DatabaseConfig.Memory
          val client = BlockchainConfig.Electrum(
              ElectrumConfig(
                  "ssl://electrum.blockstream.info:60002",
                  null,
                  5u,
                  null,
                  100u
              )
          )
          val wallet = Wallet(descriptor, null, Network.REGTEST, databaseConfig, blockchainConfig)
          wallet.sync(LogProgress(), null)
          val balance = wallet.getBalance()
          assertTrue(balance > 0u)
      }
  ```

  All tests run well on my side of things, but I'm opening this more as a discussion piece because I wasn't sure if there were other reasons for the choice of providing the argument to the `Memory` enum, or other design choices I'm not aware of. Any thoughts on this @artfuldev? I think you were the one who wrote the initial enum.

Top commit has no ACKs.

Tree-SHA512: 135e5943039a08522773f721a7cf6bbb93bd5bb9394bf42a30bab5f3e16fd35ce078056756e020a666d4f574d74080bc3404cc81809c0d7e0afe5c9471878425

.gitignore

@@ -2,9 +2,6 @@ target
 build
 Cargo.lock
 /bindings/bdk-kotlin/local.properties
-/bindings/bdk-swift
-/bindings/bdk-swift.swiftdoc
-/bindings/bdk-swift.swiftsourceinfo
 .gradle
 wallet_db
 bdk_ffi_test

CHANGELOG.md

@@ -0,0 +1,35 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [v0.4.0]
+
+- Add dual license MIT and Apache 2.0
+- Add sqlite database support
+- Fix memory database configuration enum, remove junk field
+
+## [v0.3.1]
+
+- Remove hard coded sync progress value (was always returning 21.0)
+
+## [v0.3.0]
+
+- Move bdk-kotlin bindings and ios example to separate repos
+- Add bin to generate Python bindings
+- Add `PartiallySignedBitcoinTransaction::deserialize` function as named constructor to decode from a string per [BIP 0174]
+- Add `PartiallySignedBitcoinTransaction::serialize` function to encode to a string per [BIP 0174]
+- Remove `PartiallySignedBitcoinTransaction.details` struct field
+
+[BIP 0174]:https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki#encoding
+
+## [v0.2.0]
+
+[unreleased]: https://github.com/bitcoindevkit/bdk-ffi/compare/v0.4.0...HEAD
+[v0.4.0]: https://github.com/bitcoindevkit/bdk-ffi/compare/v0.3.1...v0.4.0
+[v0.3.1]: https://github.com/bitcoindevkit/bdk-ffi/compare/v0.3.0...v0.3.1
+[v0.3.0]: https://github.com/bitcoindevkit/bdk-ffi/compare/v0.2.0...v0.3.0
+[v0.2.0]: https://github.com/bitcoindevkit/bdk-ffi/compare/v0.0.0...v0.2.0

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bdk-ffi"
-version = "0.1.0"
+version = "0.4.0"
 authors = ["Steve Myers <steve@notmandatory.org>", "Sudarsan Balaji <sudarsan.balaji@artfuldev.com>"]
 edition = "2018"
 
@@ -10,10 +10,23 @@ crate-type = ["staticlib", "cdylib"]
 name = "bdkffi"
 
 [dependencies]
-bdk = { version = "0.13", features = ["all-keys", "use-esplora-ureq"] }
-uniffi_macros = "0.14.1"
-uniffi = "0.14.1"
+bdk = { version = "0.14", features = ["all-keys", "use-esplora-ureq", "sqlite"] }
+
+# TODO remove when bdk "sqlite-bundled" feature added
+rusqlite = { version = "0.25.3", features = ["bundled"] }
+
+uniffi_macros = { version = "0.16.0", features = ["builtin-bindgen"] }
+uniffi = { version = "0.16.0", features = ["builtin-bindgen"] }
 thiserror = "1.0"
+anyhow = "=1.0.45" # remove after upgrading to next version of uniffi
+
+uniffi_bindgen = { version = "0.16.0", optional = true }
 
 [build-dependencies]
-uniffi_build = "0.14.1"
+uniffi_build = { version = "0.16.0", features = ["builtin-bindgen"] }
+
+[features]
+generate-python = ["uniffi_bindgen"]
+
+[[bin]]
+name = "generate"

LICENSE

@@ -0,0 +1,14 @@
+This software is licensed under [Apache 2.0](LICENSE-APACHE) or
+[MIT](LICENSE-MIT), at your option.
+
+Some files retain their own copyright notice, however, for full authorship
+information, see version control history.
+
+Except as otherwise noted in individual files, all files in this repository are
+licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+http://www.apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+http://opensource.org/licenses/MIT>, at your option.
+
+You may not use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of this software or any files in this repository except in
+accordance with one or both of these licenses.

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@@ -0,0 +1,201 @@
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LICENSE-MIT

@@ -0,0 +1,16 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy of
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+copies or substantial portions of the Software.
+
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+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -1,89 +1,42 @@
-# Foreign language bindings for BDK (bdk-ffi)
+# Native language bindings for BDK
 
-This repository contains source code for generating foreign language bindings
-for the rust library bdk for the Bitcoin Dev Kit (BDK) project.
+This repository contains source code for generating native language bindings for the rust based 
+[bdk] library which is the central artifact of the [Bitcoin Dev Kit] project.
+
+Each supported language has it's own repository that includes this project as a [git submodule]. 
+The rust code in this project is a wrapper around the [bdk] library to expose it's APIs in a 
+uniform way using the [mozilla/uniffi-rs] bindings generator for each supported target language.
 
 ## Supported target languages and platforms
 
-| Language | Platform | Status |
-| --- | --- | --- |
-| Kotlin | JVM | WIP |
-| Kotlin | Android | WIP |
-| Swift | iOS | WIP |
+The below repositories include instructions for using, building, and publishing the native 
+language binding for [bdk] supported by this project.
 
+| Language | Platform     | Repository   |
+| -------- | ------------ | ------------ |
+| Kotlin   | jvm          | [bdk-kotlin] |
+| Kotlin   | android      | [bdk-kotlin] |
+| Swift    | iOS, macOS   | [bdk-swift]  |
+| Python   | linux, macOS | [bdk-python] |
 
-## Getting Started (User)
+[bdk]: https://github.com/bitcoindevkit/bdk
+[Bitcoin Dev Kit]: https://github.com/bitcoindevkit
+[git submodule]: https://git-scm.com/book/en/v2/Git-Tools-Submodules
+[uniffi-rs]: https://github.com/mozilla/uniffi-rs
 
-If you just want to consume the language bindings:
+[bdk-kotlin]: https://github.com/bitcoindevkit/bdk-kotlin
+[bdk-swift]: https://github.com/bitcoindevkit/bdk-swift
+[bdk-python]: https://github.com/thunderbiscuit/bdk-python
 
-### Kotlin (JVM)
+## Contributing
 
-Just add the dependency `org.bitcoindevkit:bdk-jvm:0.1.1`. The package is `org.bitcoindevkit.bdk`.
+### Install uniffi-bindgen cli tool
 
-### Kotlin (Android)
+Install the uniffi-bindgen binary on your system using:
 
-Just add the dependency `org.bitcoindevkit:bdk-android:0.1.1`. The package is `org.bitcoindevkit.bdk`.
+`cargo install uniffi_bindgen`
 
-## Getting Started (Developer)
-
-This project uses rust. A basic knowledge of the rust ecosystem is helpful.
-
-### General
-1. Install `uniffi-bindgen`
-    ```sh
-    cargo install uniffi_bindgen
-    ```
-1. See the [UniFFI User Guide](https://mozilla.github.io/uniffi-rs/) for more info
-
-### Kotlin Bindings for JVM (OSX / Linux)
-
-1. Install required targets
-    ```sh
-      rustup target add x86_64-apple-darwin x86_64-unknown-linux-gnu
-    ```
-1. Build kotlin (JVM) bindings
-    ```sh
-      ./build.sh -k
-    ```
-1. Generated kotlin bindings are available at `/bindings/bdk-kotlin/`
-1. A demo app is available at `/bindings/bdk-kotlin/demo/`. It uses stdin for
-inputs and can be run from gradle.
-    ```sh
-    cd bindings/bdk-kotlin
-    ./gradlew :demo:run
-    ```
-
-### Kotlin bindings for Android
-
-1. Install required targets
-    ```sh
-    rustup target add x86_64-linux-android aarch64-linux-android
-    armv7-linux-androideabi i686-linux-android
-    ```
-1. Install Android SDK and Build-Tools for API level 30+
-1. Setup `$ANDROID_NDK_HOME` and `$ANDROID_SDK_ROOT` path variables (which are
-required by the build scripts)
-1. Build kotlin (Android) bindings
-    ```sh
-    ./build.sh -a
-    ```
-2. A demo android app is available at [notmandatory/bdk-sample-app](https://github.com/notmandatory/bitcoindevkit-android-sample-app/tree/upgrade-to-bdk-ffi/)
-
-### Swift bindings for iOS
-
-1. Install the latest version of xcode, download and install the advanced tools.
-1. Ensure Swift is installed
-1. Install required targets
-    ```sh
-    rustup target add aarch64-apple-ios x86_64-apple-ios
-    ```
-1. Build swift (iOS) bindings
-    ```sh
-    ./build.sh -s
-    ```
-1. Example iOS app can be found in `/examples/iOS` which can be run by xcode.
-
-## Notes
+The version must be the same as the `uniffi` dependency in `Cargo.toml`.
 
 ### Adding new structs and functions
 
@@ -109,4 +62,6 @@ See the [UniFFI User Guide](https://mozilla.github.io/uniffi-rs/)
 
 ## Thanks
 
-This project is made possible thanks to the wonderful work on [mozilla/uniffi-rs](https://github.com/mozilla/uniffi-rs)
+This project is made possible thanks to the wonderful work by the [mozilla/uniffi-rs] team.
+
+[mozilla/uniffi-rs]: https://github.com/mozilla/uniffi-rs

build.sh

@@ -1,145 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail
-
-# functions
-
-## help
-help()
-{
-   # Display Help
-   echo "Build bdk-ffi and related libraries."
-   echo
-   echo "Syntax: build [-a|h|k|s]"
-   echo "options:"
-   echo "-a     Android."
-   echo "-h     Print this Help."
-   echo "-k     Kotlin."
-   echo "-s     Swift."
-   echo
-}
-
-## rust
-build_rust() {
-  echo "Build Rust library"
-  cargo fmt
-  cargo build
-  cargo test
-}
-
-## copy to bdk-bdk-kotlin
-copy_lib_kotlin() {
-  echo -n "Copy "
-  case $OS in
-    "Darwin")
-      echo -n "darwin "
-      mkdir -p bindings/bdk-kotlin/jvm/src/main/resources/darwin-x86-64
-      cp target/debug/libbdkffi.dylib bindings/bdk-kotlin/jvm/src/main/resources/darwin-x86-64
-      ;;
-    "Linux")
-      echo -n "linux "
-      mkdir -p bindings/bdk-kotlin/jvm/src/main/resources/linux-x86-64
-      cp target/debug/libbdkffi.so bindings/bdk-kotlin/jvm/src/main/resources/linux-x86-64
-      ;;
-  esac
-  echo "libs to kotlin sub-project"
-}
-
-## bdk-bdk-kotlin jar
-build_kotlin() {
-  copy_lib_kotlin
-  uniffi-bindgen generate src/bdk.udl --no-format --out-dir bindings/bdk-kotlin/jvm/src/main/kotlin --language kotlin
-}
-
-## bdk swift
-build_swift() {
-  uniffi-bindgen generate src/bdk.udl --no-format --out-dir bindings/bdk-swift/ --language swift
-  swiftc -module-name bdk -emit-library -o libbdkffi.dylib -emit-module -emit-module-path ./bindings/bdk-swift/ -parse-as-library -L ./target/debug/ -lbdkffi -Xcc -fmodule-map-file=./bindings/bdk-swift/bdkFFI.modulemap ./bindings/bdk-swift/bdk.swift
-  TARGETDIR=target
-  RELDIR=debug
-  STATIC_LIB_NAME=libbdkffi.a
-
-  # We can't use cargo lipo because we can't link to universal libraries :(
-  # https://github.com/rust-lang/rust/issues/55235
-  LIBS_ARCHS=("x86_64" "arm64")
-  IOS_TRIPLES=("x86_64-apple-ios" "aarch64-apple-ios")
-  for i in "${!LIBS_ARCHS[@]}"; do
-      cargo build --target "${IOS_TRIPLES[${i}]}"
-  done
-
-  UNIVERSAL_BINARY=./${TARGETDIR}/ios/universal/${RELDIR}/${STATIC_LIB_NAME}
-  NEED_LIPO=
-
-  # if the universal binary doesnt exist, or if it's older than the static libs,
-  # we need to run `lipo` again.
-  if [[ ! -f "${UNIVERSAL_BINARY}" ]]; then
-      NEED_LIPO=1
-  elif [[ "$(stat -f "%m" "./${TARGETDIR}/x86_64-apple-ios/${RELDIR}/${STATIC_LIB_NAME}")" -gt "$(stat -f "%m" "${UNIVERSAL_BINARY}")" ]]; then
-      NEED_LIPO=1
-  elif [[ "$(stat -f "%m" "./${TARGETDIR}/aarch64-apple-ios/${RELDIR}/${STATIC_LIB_NAME}")" -gt "$(stat -f "%m" "${UNIVERSAL_BINARY}")" ]]; then
-      NEED_LIPO=1
-  fi
-  if [[ "${NEED_LIPO}" = "1" ]]; then
-      mkdir -p "${TARGETDIR}/ios/universal/${RELDIR}"
-      lipo -create -output "${UNIVERSAL_BINARY}" \
-          "${TARGETDIR}/x86_64-apple-ios/${RELDIR}/${STATIC_LIB_NAME}" \
-          "${TARGETDIR}/aarch64-apple-ios/${RELDIR}/${STATIC_LIB_NAME}"
-  fi
-}
-
-## rust android
-build_android() {
-  build_kotlin
-
-  # If ANDROID_NDK_HOME is not set then set it to github actions default
-  [ -z "$ANDROID_NDK_HOME" ] && export ANDROID_NDK_HOME=$ANDROID_HOME/ndk-bundle
-
-  # Update this line accordingly if you are not building *from* darwin-x86_64 or linux-x86_64
-  export PATH=$PATH:$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/`uname | tr '[:upper:]' '[:lower:]'`-x86_64/bin
-
-  # Required for 'ring' dependency to cross-compile to Android platform, must be at least 21
-  export CFLAGS="-D__ANDROID_API__=21"
-
-  # IMPORTANT: make sure every target is not a substring of a different one. We check for them with grep later on
-  BUILD_TARGETS="${BUILD_TARGETS:-aarch64,x86_64,i686}"
-
-  mkdir -p bindings/bdk-kotlin/android/src/main/jniLibs/ bindings/bdk-kotlin/android/src/main/jniLibs/arm64-v8a bindings/bdk-kotlin/android/src/main/jniLibs/x86_64 bindings/bdk-kotlin/android/src/main/jniLibs/x86
-
-  if echo $BUILD_TARGETS | grep "aarch64"; then
-      CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER="aarch64-linux-android21-clang" CC="aarch64-linux-android21-clang" cargo build --target=aarch64-linux-android
-      cp target/aarch64-linux-android/debug/libbdkffi.so bindings/bdk-kotlin/android/src/main/jniLibs/arm64-v8a
-  fi
-  if echo $BUILD_TARGETS | grep "x86_64"; then
-      CARGO_TARGET_X86_64_LINUX_ANDROID_LINKER="x86_64-linux-android21-clang" CC="x86_64-linux-android21-clang" cargo build --target=x86_64-linux-android
-      cp target/x86_64-linux-android/debug/libbdkffi.so bindings/bdk-kotlin/android/src/main/jniLibs/x86_64
-  fi
-  if echo $BUILD_TARGETS | grep "i686"; then
-      CARGO_TARGET_I686_LINUX_ANDROID_LINKER="i686-linux-android21-clang" CC="i686-linux-android21-clang" cargo build --target=i686-linux-android
-      cp target/i686-linux-android/debug/libbdkffi.so bindings/bdk-kotlin/android/src/main/jniLibs/x86
-  fi
-
-  # copy sources
-  cp -R bindings/bdk-kotlin/jvm/src/main/kotlin bindings/bdk-kotlin/android/src/main
-
-  # bdk-kotlin aar
-  (cd bindings/bdk-kotlin && ./gradlew :android:build)
-}
-
-OS=$(uname)
-
-if [ "$1" == "-h" ]
-then
-  help
-else
-  build_rust
-
-  while [ -n "$1" ]; do # while loop starts
-    case "$1" in
-      -a) build_android ;;
-      -k) build_kotlin ;;
-      -s) build_swift ;;
-      -h) help ;;
-      *) echo "Option $1 not recognized" ;;
-    esac
-    shift
-  done
-fi

src/bdk.udl

@@ -1,6 +1,6 @@
 namespace bdk {
   [Throws=BdkError]
-  ExtendedKeyInfo generate_extended_key(Network network, MnemonicType mnemonic_type, string? password);
+  ExtendedKeyInfo generate_extended_key(Network network, WordCount word_count, string? password);
   [Throws=BdkError]
   ExtendedKeyInfo restore_extended_key(Network network, string mnemonic, string? password);
 };
@@ -46,6 +46,7 @@ enum BdkError {
   "Electrum",
   "Esplora",
   "Sled",
+  "Rusqlite",
 };
 
 enum Network {
@@ -60,20 +61,25 @@ dictionary SledDbConfiguration {
   string tree_name;
 };
 
+dictionary SqliteDbConfiguration {
+  string path;
+};
+
 [Enum]
 interface DatabaseConfig {
-  Memory(string junk);
+  Memory();
   Sled(SledDbConfiguration config);
+  Sqlite(SqliteDbConfiguration config);
 };
 
 dictionary TransactionDetails {
     u64? fees;
     u64 received;
     u64 sent;
-    string id;
+    string txid;
 };
 
-dictionary Confirmation {
+dictionary BlockTime {
     u32 height;
     u64 timestamp;
 };
@@ -81,22 +87,7 @@ dictionary Confirmation {
 [Enum]
 interface Transaction {
   Unconfirmed(TransactionDetails details);
-  Confirmed(TransactionDetails details, Confirmation confirmation);
-};
-
-interface OfflineWallet {
-  [Throws=BdkError]
-  constructor(string descriptor, Network network, DatabaseConfig database_config);
-
-  // OfflineWalletOperations
-  string get_new_address();
-  string get_last_unused_address();
-  [Throws=BdkError]
-  u64 get_balance();
-  [Throws=BdkError]
-  void sign([ByRef] PartiallySignedBitcoinTransaction psbt);
-  [Throws=BdkError]
-  sequence<Transaction> get_transactions();
+  Confirmed(TransactionDetails details, BlockTime confirmation);
 };
 
 dictionary ElectrumConfig {
@@ -125,11 +116,9 @@ callback interface BdkProgress {
   void update(f32 progress, string? message);
 };
 
-interface OnlineWallet {
+interface Wallet {
   [Throws=BdkError]
   constructor(string descriptor, string? change_descriptor, Network network, DatabaseConfig database_config, BlockchainConfig blockchain_config);
-
-  // OfflineWalletOperations
   string get_new_address();
   string get_last_unused_address();
   [Throws=BdkError]
@@ -138,8 +127,6 @@ interface OnlineWallet {
   void sign([ByRef] PartiallySignedBitcoinTransaction psbt);
   [Throws=BdkError]
   sequence<Transaction> get_transactions();
-
-  // OnlineWalletInterface
   Network get_network();
   [Throws=BdkError]
   void sync(BdkProgress progress_update, u32? max_address_param);
@@ -149,7 +136,10 @@ interface OnlineWallet {
 
 interface PartiallySignedBitcoinTransaction {
   [Throws=BdkError]
-  constructor([ByRef] OnlineWallet wallet, string recipient, u64 amount, float? fee_rate);
+  constructor([ByRef] Wallet wallet, string recipient, u64 amount, float? fee_rate);
+  [Name=deserialize,Throws=BdkError]
+  constructor(string psbt_base64);
+  string serialize();
 };
 
 dictionary ExtendedKeyInfo {
@@ -158,7 +148,7 @@ dictionary ExtendedKeyInfo {
   string fingerprint;
 };
 
-enum MnemonicType {
+enum WordCount {
   "Words12",
   "Words15",
   "Words18",

src/bin/generate.rs

@@ -0,0 +1,67 @@
+pub const BDK_UDL: &str = "src/bdk.udl";
+
+#[cfg(feature = "generate-python")]
+fn fixup_python_lib_path<O: AsRef<std::path::Path>>(
+    out_dir: O,
+    lib_name: &str,
+) -> Result<(), Box<dyn std::error::Error>> {
+    use std::fs;
+    use std::io::Write;
+
+    const LOAD_INDIRECT_DEF: &str = "def loadIndirect():";
+
+    let bindings_file = out_dir.as_ref().join("bdk.py");
+    let mut data = fs::read_to_string(&bindings_file)?;
+
+    let pos = data.find(LOAD_INDIRECT_DEF).expect(&format!(
+        "loadIndirect not found in `{}`",
+        bindings_file.display()
+    ));
+    let range = pos..pos + LOAD_INDIRECT_DEF.len();
+
+    let replacement = format!(
+        r#"
+def loadIndirect():
+    import glob
+    return getattr(ctypes.cdll, glob.glob(os.path.join(os.path.dirname(os.path.abspath(__file__)), '{}.*'))[0])
+
+def _loadIndirectOld():"#,
+        lib_name
+    );
+    data.replace_range(range, &replacement);
+
+    let mut file = fs::OpenOptions::new()
+        .write(true)
+        .truncate(true)
+        .open(&bindings_file)?;
+    file.write(data.as_bytes())?;
+
+    Ok(())
+}
+
+#[cfg(feature = "generate-python")]
+fn generate_python() -> Result<(), Box<dyn std::error::Error>> {
+    use std::env;
+
+    let out_path = env::var("GENERATE_PYTHON_BINDINGS_OUT")
+        .map_err(|_| String::from("`GENERATE_PYTHON_BINDINGS_OUT` env variable missing"))?;
+    uniffi_bindgen::generate_bindings(
+        &format!("{}/{}", env!("CARGO_MANIFEST_DIR"), BDK_UDL),
+        None,
+        vec!["python"],
+        Some(&out_path),
+        false,
+    )?;
+
+    if let Some(name) = env::var("GENERATE_PYTHON_BINDINGS_FIXUP_LIB_PATH").ok() {
+        fixup_python_lib_path(&out_path, &name)?;
+    }
+
+    Ok(())
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    #[cfg(feature = "generate-python")]
+    generate_python()?;
+    Ok(())
+}

src/lib.rs

@@ -6,13 +6,13 @@ use bdk::blockchain::Progress;
 use bdk::blockchain::{
     electrum::ElectrumBlockchainConfig, esplora::EsploraBlockchainConfig, ConfigurableBlockchain,
 };
-use bdk::database::any::{AnyDatabase, SledDbConfiguration};
+use bdk::database::any::{AnyDatabase, SledDbConfiguration, SqliteDbConfiguration};
 use bdk::database::{AnyDatabaseConfig, ConfigurableDatabase};
-use bdk::keys::bip39::{Language, Mnemonic, MnemonicType};
+use bdk::keys::bip39::{Language, Mnemonic, WordCount};
 use bdk::keys::{DerivableKey, ExtendedKey, GeneratableKey, GeneratedKey};
 use bdk::miniscript::BareCtx;
 use bdk::wallet::AddressIndex;
-use bdk::{ConfirmationTime, Error, FeeRate, SignOptions, Wallet};
+use bdk::{BlockTime, Error, FeeRate, SignOptions, Wallet as BdkWallet};
 use std::convert::TryFrom;
 use std::str::FromStr;
 use std::sync::{Mutex, MutexGuard};
@@ -22,8 +22,9 @@ uniffi_macros::include_scaffolding!("bdk");
 type BdkError = Error;
 
 pub enum DatabaseConfig {
-    Memory { junk: String },
+    Memory,
     Sled { config: SledDbConfiguration },
+    Sqlite { config: SqliteDbConfiguration },
 }
 
 pub struct ElectrumConfig {
@@ -48,17 +49,7 @@ pub enum BlockchainConfig {
 }
 
 trait WalletHolder<B> {
-    fn get_wallet(&self) -> MutexGuard<Wallet<B, AnyDatabase>>;
-}
-
-struct OfflineWallet {
-    wallet: Mutex<Wallet<(), AnyDatabase>>,
-}
-
-impl WalletHolder<()> for OfflineWallet {
-    fn get_wallet(&self) -> MutexGuard<Wallet<(), AnyDatabase>> {
-        self.wallet.lock().unwrap()
-    }
+    fn get_wallet(&self) -> MutexGuard<BdkWallet<B, AnyDatabase>>;
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Default)]
@@ -66,11 +57,9 @@ pub struct TransactionDetails {
     pub fees: Option<u64>,
     pub received: u64,
     pub sent: u64,
-    pub id: String,
+    pub txid: String,
 }
 
-type Confirmation = ConfirmationTime;
-
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Transaction {
     Unconfirmed {
@@ -78,7 +67,7 @@ pub enum Transaction {
     },
     Confirmed {
         details: TransactionDetails,
-        confirmation: Confirmation,
+        confirmation: BlockTime,
     },
 }
 
@@ -86,7 +75,7 @@ impl From<&bdk::TransactionDetails> for TransactionDetails {
     fn from(x: &bdk::TransactionDetails) -> TransactionDetails {
         TransactionDetails {
             fees: x.fee,
-            id: x.txid.to_string(),
+            txid: x.txid.to_string(),
             received: x.received,
             sent: x.sent,
         }
@@ -96,9 +85,9 @@ impl From<&bdk::TransactionDetails> for TransactionDetails {
 impl From<&bdk::TransactionDetails> for Transaction {
     fn from(x: &bdk::TransactionDetails) -> Transaction {
         match x.confirmation_time.clone() {
-            Some(confirmation) => Transaction::Confirmed {
+            Some(block_time) => Transaction::Confirmed {
                 details: TransactionDetails::from(x),
-                confirmation,
+                confirmation: block_time,
             },
             None => Transaction::Unconfirmed {
                 details: TransactionDetails::from(x),
@@ -107,7 +96,7 @@ impl From<&bdk::TransactionDetails> for Transaction {
     }
 }
 
-trait OfflineWalletOperations<B>: WalletHolder<B> {
+trait WalletOperations<B>: WalletHolder<B> {
     fn get_new_address(&self) -> String {
         self.get_wallet()
             .get_address(AddressIndex::New)
@@ -128,7 +117,7 @@ trait OfflineWalletOperations<B>: WalletHolder<B> {
         self.get_wallet().get_balance()
     }
 
-    fn sign<'a>(&self, psbt: &'a PartiallySignedBitcoinTransaction) -> Result<(), Error> {
+    fn sign(&self, psbt: &PartiallySignedBitcoinTransaction) -> Result<(), Error> {
         let mut psbt = psbt.internal.lock().unwrap();
         let finalized = self.get_wallet().sign(&mut psbt, SignOptions::default())?;
         match finalized {
@@ -146,26 +135,8 @@ trait OfflineWalletOperations<B>: WalletHolder<B> {
     }
 }
 
-impl OfflineWallet {
-    fn new(
-        descriptor: String,
-        network: Network,
-        database_config: DatabaseConfig,
-    ) -> Result<Self, BdkError> {
-        let any_database_config = match database_config {
-            DatabaseConfig::Memory { .. } => AnyDatabaseConfig::Memory(()),
-            DatabaseConfig::Sled { config } => AnyDatabaseConfig::Sled(config),
-        };
-        let database = AnyDatabase::from_config(&any_database_config)?;
-        let wallet = Mutex::new(Wallet::new_offline(&descriptor, None, network, database)?);
-        Ok(OfflineWallet { wallet })
-    }
-}
-
-impl OfflineWalletOperations<()> for OfflineWallet {}
-
-struct OnlineWallet {
-    wallet: Mutex<Wallet<AnyBlockchain, AnyDatabase>>,
+struct Wallet {
+    wallet_mutex: Mutex<BdkWallet<AnyBlockchain, AnyDatabase>>,
 }
 
 pub trait BdkProgress: Send + Sync {
@@ -185,20 +156,19 @@ impl Progress for BdkProgressHolder {
 
 struct PartiallySignedBitcoinTransaction {
     internal: Mutex<PartiallySignedTransaction>,
-    details: bdk::TransactionDetails,
 }
 
 impl PartiallySignedBitcoinTransaction {
     fn new(
-        online_wallet: &OnlineWallet,
+        wallet: &Wallet,
         recipient: String,
         amount: u64,
         fee_rate: Option<f32>, // satoshis per vbyte
     ) -> Result<Self, Error> {
-        let wallet = online_wallet.get_wallet();
+        let wallet = wallet.get_wallet();
         match Address::from_str(&recipient) {
             Ok(address) => {
-                let (psbt, details) = {
+                let (psbt, _details) = {
                     let mut builder = wallet.build_tx();
                     builder.add_recipient(address.script_pubkey(), amount);
                     if let Some(sat_per_vb) = fee_rate {
@@ -208,7 +178,6 @@ impl PartiallySignedBitcoinTransaction {
                 };
                 Ok(PartiallySignedBitcoinTransaction {
                     internal: Mutex::new(psbt),
-                    details,
                 })
             }
             Err(..) => Err(BdkError::Generic(
@@ -216,9 +185,29 @@ impl PartiallySignedBitcoinTransaction {
             )),
         }
     }
+
+    pub fn deserialize(psbt_base64: String) -> Result<Self, Error> {
+        let psbt: PartiallySignedTransaction = PartiallySignedTransaction::from_str(&psbt_base64)?;
+        Ok(PartiallySignedBitcoinTransaction {
+            internal: Mutex::new(psbt),
+        })
+    }
+
+    pub fn serialize(&self) -> String {
+        let psbt = self.internal.lock().unwrap().clone();
+        psbt.to_string()
+    }
 }
 
-impl OnlineWallet {
+impl WalletHolder<AnyBlockchain> for Wallet {
+    fn get_wallet(&self) -> MutexGuard<BdkWallet<AnyBlockchain, AnyDatabase>> {
+        self.wallet_mutex.lock().unwrap()
+    }
+}
+
+impl WalletOperations<AnyBlockchain> for Wallet {}
+
+impl Wallet {
     fn new(
         descriptor: String,
         change_descriptor: Option<String>,
@@ -227,8 +216,9 @@ impl OnlineWallet {
         blockchain_config: BlockchainConfig,
     ) -> Result<Self, BdkError> {
         let any_database_config = match database_config {
-            DatabaseConfig::Memory { .. } => AnyDatabaseConfig::Memory(()),
+            DatabaseConfig::Memory => AnyDatabaseConfig::Memory(()),
             DatabaseConfig::Sled { config } => AnyDatabaseConfig::Sled(config),
+            DatabaseConfig::Sqlite { config } => AnyDatabaseConfig::Sqlite(config),
         };
         let any_blockchain_config = match blockchain_config {
             BlockchainConfig::Electrum { config } => {
@@ -252,18 +242,18 @@ impl OnlineWallet {
         };
         let database = AnyDatabase::from_config(&any_database_config)?;
         let blockchain = AnyBlockchain::from_config(&any_blockchain_config)?;
-        let wallet = Mutex::new(Wallet::new(
+        let wallet_mutex = Mutex::new(BdkWallet::new(
             &descriptor,
             change_descriptor.to_owned().as_ref(),
             network,
             database,
             blockchain,
         )?);
-        Ok(OnlineWallet { wallet })
+        Ok(Wallet { wallet_mutex })
     }
 
     fn get_network(&self) -> Network {
-        self.wallet.lock().unwrap().network()
+        self.get_wallet().network()
     }
 
     fn sync(
@@ -271,31 +261,18 @@ impl OnlineWallet {
         progress_update: Box<dyn BdkProgress>,
         max_address_param: Option<u32>,
     ) -> Result<(), BdkError> {
-        progress_update.update(21.0, Some("message".to_string()));
-        self.wallet
-            .lock()
-            .unwrap()
+        self.get_wallet()
             .sync(BdkProgressHolder { progress_update }, max_address_param)
     }
 
-    fn broadcast<'a>(
-        &self,
-        psbt: &'a PartiallySignedBitcoinTransaction,
-    ) -> Result<Transaction, Error> {
+    fn broadcast(&self, psbt: &PartiallySignedBitcoinTransaction) -> Result<Transaction, Error> {
         let tx = psbt.internal.lock().unwrap().clone().extract_tx();
-        self.get_wallet().broadcast(tx)?;
-        Ok(Transaction::from(&psbt.details))
+        self.get_wallet().broadcast(&tx)?;
+        let tx_details = self.get_wallet().get_tx(&tx.txid(), true)?;
+        Ok(Transaction::from(&tx_details.unwrap()))
     }
 }
 
-impl WalletHolder<AnyBlockchain> for OnlineWallet {
-    fn get_wallet(&self) -> MutexGuard<Wallet<AnyBlockchain, AnyDatabase>> {
-        self.wallet.lock().unwrap()
-    }
-}
-
-impl OfflineWalletOperations<AnyBlockchain> for OnlineWallet {}
-
 pub struct ExtendedKeyInfo {
     mnemonic: String,
     xprv: String,
@@ -304,11 +281,11 @@ pub struct ExtendedKeyInfo {
 
 fn generate_extended_key(
     network: Network,
-    mnemonic_type: MnemonicType,
+    word_count: WordCount,
     password: Option<String>,
 ) -> Result<ExtendedKeyInfo, Error> {
     let mnemonic: GeneratedKey<_, BareCtx> =
-        Mnemonic::generate((mnemonic_type, Language::English)).unwrap();
+        Mnemonic::generate((word_count, Language::English)).unwrap();
     let mnemonic = mnemonic.into_key();
     let xkey: ExtendedKey = (mnemonic.clone(), password).into_extended_key()?;
     let xprv = xkey.into_xprv(network).unwrap();
@@ -325,7 +302,7 @@ fn restore_extended_key(
     mnemonic: String,
     password: Option<String>,
 ) -> Result<ExtendedKeyInfo, Error> {
-    let mnemonic = Mnemonic::from_phrase(mnemonic.as_ref(), Language::English).unwrap();
+    let mnemonic = Mnemonic::parse_in(Language::English, mnemonic).unwrap();
     let xkey: ExtendedKey = (mnemonic.clone(), password).into_extended_key()?;
     let xprv = xkey.into_xprv(network).unwrap();
     let fingerprint = xprv.fingerprint(&Secp256k1::new());
@@ -336,5 +313,4 @@ fn restore_extended_key(
     })
 }
 
-uniffi::deps::static_assertions::assert_impl_all!(OfflineWallet: Sync, Send);
-uniffi::deps::static_assertions::assert_impl_all!(OnlineWallet: Sync, Send);
+uniffi::deps::static_assertions::assert_impl_all!(Wallet: Sync, Send);

test.sh

@@ -1,44 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail
-
-# functions
-
-## help
-help()
-{
-   # Display Help
-   echo "Test bdk-uniffi and related libraries."
-   echo
-   echo "Syntax: build [-a|h|k]"
-   echo "options:"
-   echo "-a     Android connected device tests."
-   echo "-h     Print this Help."
-   echo "-k     Kotlin tests."
-   echo
-}
-
-test_kotlin() {
-  (cd bindings/bdk-kotlin && ./gradlew :jvm:test -Djna.debug_load=true)
-}
-
-test_android() {
-  (cd bindings/bdk-kotlin && ./gradlew :android:connectedDebugAndroidTest)
-}
-
-if [ $1 = "-h" ]
-then
-  help
-else
-  cargo test
-
-  # optional tests
-  while [ -n "$1" ]; do # while loop starts
-    case "$1" in
-      -a) test_android ;;
-      -h) help ;;
-      -k) test_kotlin ;;
-      *) echo "Option $1 not recognized" ;;
-    esac
-    shift
-  done
-fi