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b5fcddc Add sqlite migration to drop duplicated script_pubkeys rows (Steve Myers)
21c96c9 Add test for issue #801 (Alekos Filini)
c51d544 [wip] Ensure there are no duplicated script_pubkeys in sqlite (Alekos Filini)

Pull request description:

  ### Description

  Add a `UNIQUE` constraint on the script_pubkeys table so that it doesn't grow constantly when caching new addresses.

  Fixes #801

  ### Notes to the reviewers

  Adding it to the 0.25 milestone since it's just a bugfix.

  Still in draft because I need to add extra migration queries to clean up existing dbs.

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [x] I've added tests to reproduce the issue which are now passing
  * [x] I'm linking the issue being fixed by this PR

ACKs for top commit:
  notmandatory:
    ACK b5fcddc

Tree-SHA512: 7b10e453bb38af5c4f80f77692a56e37259680e50f9c2c9e554a0e5f04fb9cab897da6476c6c9930f1c501b455472984a1c92c4f137cff49acdc390d2e705107
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BDK

A modern, lightweight, descriptor-based wallet library written in Rust!

Crate Info MIT or Apache-2.0 Licensed CI Status API Docs Rustc Version 1.56.1+ Chat on Discord

Project Homepage | Documentation

About

The bdk library aims to be the core building block for Bitcoin wallets of any kind.

  • It uses Miniscript to support descriptors with generalized conditions. This exact same library can be used to build single-sig wallets, multisigs, timelocked contracts and more.
  • It supports multiple blockchain backends and databases, allowing developers to choose exactly what's right for their projects.
  • It's built to be cross-platform: the core logic works on desktop, mobile, and even WebAssembly.
  • It's very easy to extend: developers can implement customized logic for blockchain backends, databases, signers, coin selection, and more, without having to fork and modify this library.

Examples

Sync the balance of a descriptor

use bdk::Wallet;
use bdk::database::MemoryDatabase;
use bdk::blockchain::ElectrumBlockchain;
use bdk::SyncOptions;
use bdk::electrum_client::Client;
use bdk::bitcoin::Network;

fn main() -> Result<(), bdk::Error> {
    let blockchain = ElectrumBlockchain::from(Client::new("ssl://electrum.blockstream.info:60002")?);
    let wallet = Wallet::new(
        "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/0/*)",
        Some("wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/1/*)"),
        Network::Testnet,
        MemoryDatabase::default(),
    )?;

    wallet.sync(&blockchain, SyncOptions::default())?;

    println!("Descriptor balance: {} SAT", wallet.get_balance()?);

    Ok(())
}

Generate a few addresses

use bdk::{Wallet, database::MemoryDatabase};
use bdk::wallet::AddressIndex::New;

fn main() -> Result<(), bdk::Error> {
    let wallet = Wallet::new(
        "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/0/*)",
        Some("wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/1/*)"),
        bitcoin::Network::Testnet,
        MemoryDatabase::default(),
    )?;

    println!("Address #0: {}", wallet.get_address(New)?);
    println!("Address #1: {}", wallet.get_address(New)?);
    println!("Address #2: {}", wallet.get_address(New)?);

    Ok(())
}

Create a transaction

use bdk::{FeeRate, Wallet, SyncOptions};
use bdk::database::MemoryDatabase;
use bdk::blockchain::ElectrumBlockchain;

use bdk::electrum_client::Client;
use bdk::wallet::AddressIndex::New;

use base64;
use bitcoin::consensus::serialize;

fn main() -> Result<(), bdk::Error> {
    let blockchain = ElectrumBlockchain::from(Client::new("ssl://electrum.blockstream.info:60002")?);
    let wallet = Wallet::new(
        "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/0/*)",
        Some("wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/1/*)"),
        bitcoin::Network::Testnet,
        MemoryDatabase::default(),
    )?;

    wallet.sync(&blockchain, SyncOptions::default())?;

    let send_to = wallet.get_address(New)?;
    let (psbt, details) = {
        let mut builder = wallet.build_tx();
        builder
            .add_recipient(send_to.script_pubkey(), 50_000)
            .enable_rbf()
            .do_not_spend_change()
            .fee_rate(FeeRate::from_sat_per_vb(5.0));
        builder.finish()?
    };

    println!("Transaction details: {:#?}", details);
    println!("Unsigned PSBT: {}", base64::encode(&serialize(&psbt)));

    Ok(())
}

Sign a transaction

use bdk::{Wallet, SignOptions, database::MemoryDatabase};

use base64;
use bitcoin::consensus::deserialize;

fn main() -> Result<(), bdk::Error> {
    let wallet = Wallet::new(
        "wpkh([c258d2e4/84h/1h/0h]tprv8griRPhA7342zfRyB6CqeKF8CJDXYu5pgnj1cjL1u2ngKcJha5jjTRimG82ABzJQ4MQe71CV54xfn25BbhCNfEGGJZnxvCDQCd6JkbvxW6h/0/*)",
        Some("wpkh([c258d2e4/84h/1h/0h]tprv8griRPhA7342zfRyB6CqeKF8CJDXYu5pgnj1cjL1u2ngKcJha5jjTRimG82ABzJQ4MQe71CV54xfn25BbhCNfEGGJZnxvCDQCd6JkbvxW6h/1/*)"),
        bitcoin::Network::Testnet,
        MemoryDatabase::default(),
    )?;

    let psbt = "...";
    let mut psbt = deserialize(&base64::decode(psbt).unwrap())?;

    let finalized = wallet.sign(&mut psbt, SignOptions::default())?;

    Ok(())
}

Testing

Unit testing

cargo test

Integration testing

Integration testing require testing features, for example:

cargo test --features test-electrum

The other options are test-esplora, test-rpc or test-rpc-legacy which runs against an older version of Bitcoin Core. Note that electrs and bitcoind binaries are automatically downloaded (on mac and linux), to specify you already have installed binaries you must use --no-default-features and provide BITCOIND_EXE and ELECTRS_EXE as environment variables.

Running under WASM

If you want to run this library under WASM you will probably have to add the following lines to you Cargo.toml:

[dependencies]
getrandom = { version = "0.2", features = ["js"] }

This enables the rand crate to work in environments where JavaScript is available. See this link to learn more.

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.