bitcoindevkit / Bdk
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A modern, lightweight, descriptor-based wallet library written in Rust!
Stars: ✭ 168
Programming Languages
rust
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BDK
A modern, lightweight, descriptor-based wallet library written in Rust!
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::{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, 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 psbt = deserialize(&base64::decode(psbt).unwrap())?;
let (signed_psbt, finalized) = wallet.sign(psbt, None)?;
Ok(())
}
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
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.
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for each open source project belongs to its rightful owner.
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