Crate bdk_wallet

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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 1.63.0+ Chat on Discord

Project Homepage | Documentation

§BDK Wallet

The bdk_wallet crate provides the Wallet type which is a simple, high-level interface built from the low-level components of bdk_chain. Wallet is a good starting point for many simple applications as well as a good demonstration of how to use the other mechanisms to construct a wallet. It has two keychains (external and internal) which are defined by miniscript descriptors and uses them to generate addresses. When you give it chain data it also uses the descriptors to find transaction outputs owned by them. From there, you can create and sign transactions.

For details about the API of Wallet see the module-level documentation.

§Blockchain data

In order to get blockchain data for Wallet to consume, you should configure a client from an available chain source. Typically you make a request to the chain source and get a response that the Wallet can use to update its view of the chain.

Blockchain Data Sources

  • bdk_esplora: Grabs blockchain data from Esplora for updating BDK structures.
  • bdk_electrum: Grabs blockchain data from Electrum for updating BDK structures.
  • bdk_bitcoind_rpc: Grabs blockchain data from Bitcoin Core for updating BDK structures.

Examples

§Persistence

To persist Wallet state data use a data store crate that reads and writes ChangeSet.

Implementations

Example

use bdk_wallet::{bitcoin::Network, KeychainKind, ChangeSet, Wallet};

// Open or create a new file store for wallet data.
let mut db =
    bdk_file_store::Store::<ChangeSet>::open_or_create_new(b"magic_bytes", "/tmp/my_wallet.db")
        .expect("create store");

// Create a wallet with initial wallet data read from the file store.
let network = Network::Testnet;
let descriptor = "wpkh(tprv8ZgxMBicQKsPdcAqYBpzAFwU5yxBUo88ggoBqu1qPcHUfSbKK1sKMLmC7EAk438btHQrSdu3jGGQa6PA71nvH5nkDexhLteJqkM4dQmWF9g/84'/1'/0'/0/*)";
let change_descriptor = "wpkh(tprv8ZgxMBicQKsPdcAqYBpzAFwU5yxBUo88ggoBqu1qPcHUfSbKK1sKMLmC7EAk438btHQrSdu3jGGQa6PA71nvH5nkDexhLteJqkM4dQmWF9g/84'/1'/0'/1/*)";
let wallet_opt = Wallet::load()
    .descriptor(KeychainKind::External, Some(descriptor))
    .descriptor(KeychainKind::Internal, Some(change_descriptor))
    .extract_keys()
    .check_network(network)
    .load_wallet(&mut db)
    .expect("wallet");
let mut wallet = match wallet_opt {
    Some(wallet) => wallet,
    None => Wallet::create(descriptor, change_descriptor)
        .network(network)
        .create_wallet(&mut db)
        .expect("wallet"),
};

// Get a new address to receive bitcoin.
let receive_address = wallet.reveal_next_address(KeychainKind::External);
// Persist staged wallet data changes to the file store.
wallet.persist(&mut db).expect("persist");
println!("Your new receive address is: {}", receive_address.address);

§Testing

§Unit testing

cargo test

§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.

Re-exports§

  • pub extern crate bitcoin;
  • pub extern crate bdk_chain as chain;
  • pub extern crate bdk_file_store as file_store;
  • pub extern crate miniscript;
  • pub extern crate serde;
  • pub extern crate serde_json;
  • pub use descriptor::template;
  • pub use descriptor::HdKeyPaths;
  • pub use signer;
  • pub use bdk_chain::rusqlite;

Modules§

Macros§

  • descriptor
    Macro to write full descriptors with code
  • fragment
    Macro to write descriptor fragments with code

Structs§

Enums§

Traits§

Functions§

Type Aliases§

  • WalletTx
    A CanonicalTx managed by a Wallet.