bda416df0a
Currently we have a unit test to test that signers are sorted by ordering. We call `add_external` to add them but currently we add them in the same order we expect them to be in. This means if the implementation happens to insert them simply in the order they are added (i.e. insert to end of list) then this test will still pass. Insert in a mixed order, including one lower followed by one higher - this ensures we are not inserting at the front or at the back but are actually sorting based on the `SignerOrdering`.
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};
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_new_address()?);
println!("Address #1: {}", wallet.get_new_address()?);
println!("Address #2: {}", wallet.get_new_address()?);
Ok(())
}
Create a transaction
use bdk::{FeeRate, Wallet};
use bdk::database::MemoryDatabase;
use bdk::blockchain::{noop_progress, ElectrumBlockchain};
use bdk::electrum_client::Client;
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_new_address()?;
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(())
}