Skip to content

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

License

Unknown and 2 other licenses found

Licenses found

Unknown
LICENSE
Apache-2.0
LICENSE-APACHE
MIT
LICENSE-MIT
Notifications You must be signed in to change notification settings

rajarshimaitra/bdk

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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 1.46+ Chat on Discord

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::{noop_progress, ElectrumBlockchain};

use bdk::electrum_client::Client;

fn main() -> Result<(), bdk::Error> {
    let client = 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(),
        ElectrumBlockchain::from(client)
    )?;

    wallet.sync(noop_progress(), None)?;

    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_offline(
        "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};
use bdk::database::MemoryDatabase;
use bdk::blockchain::{noop_progress, ElectrumBlockchain};

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

use bitcoin::consensus::serialize;

fn main() -> Result<(), bdk::Error> {
    let client = 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(),
        ElectrumBlockchain::from(client)
    )?;

    wallet.sync(noop_progress(), None)?;

    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_offline(
        "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 or test-rpc. 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.

About

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

Resources

License

Unknown and 2 other licenses found

Licenses found

Unknown
LICENSE
Apache-2.0
LICENSE-APACHE
MIT
LICENSE-MIT

Stars

Watchers

Forks

Packages

No packages published

Languages

  • Rust 99.9%
  • Shell 0.1%