Steve Myers 1fd62a7afc
Merge bitcoindevkit/bdk#575: Remove database flush
5ff8320e3b1cb4e3971549a3e3c168f20762d04b add private function ivcec_to_u32 in keyvalue (KaFai Choi)
e68d3b9e63914c1008e1a4bb20a847428659d52e remove Database::flush (KaFai Choi)

Pull request description:

  <!-- You can erase any parts of this template not applicable to your Pull Request. -->

  ### Description

  This PR is to remove Database::flush. See this issue for detail https://github.com/bitcoindevkit/bdk/issues/567

  ### Notes to the reviewers
  The 2nd commit is a small refactoring of adding a new private ivec_to_u32 to avoid too much code duplication. Please let me know if it's ok to include this in this PR or I should make it into a separate PR

  Currently existing test cases are shared across for all Databaes implementation so I am not sure if we should add  specific test cases for keyvalue(Tree) for this auto-flush behaviour?(and I feel like it's more a implementation detail). Please let me know how should I proceed for test case in this PR

  ### 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

  #### New Features:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature
  * [x] I've updated `CHANGELOG.md`

  #### Bugfixes:

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

ACKs for top commit:
  danielabrozzoni:
    re-ACK 5ff8320e3b1cb4e3971549a3e3c168f20762d04b

Tree-SHA512: eb37de8217efeb89d3ae346da36d0fb55aa67554d591b4759500f793bcf6aa7601c3d717fd473136c88e76aa72dbb6008ecf62b1d4ccf5ba3cbd1598f758522a
2022-07-04 13:40:56 -07:00
2022-06-27 12:29:10 +02:00
2022-05-04 17:29:07 +02:00
2021-09-30 11:24:01 -07:00
2020-11-16 12:09:14 +01:00

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 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 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.

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.

Languages
Rust 99.9%