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Update psbt_signer example to use descriptor! macro

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Steve Myers 2022-10-09 21:36:53 -05:00
parent 7de8be46c0
commit 1331193800
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1 changed files with 24 additions and 6 deletions
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examples/psbt_signer.rs
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@ -9,20 +9,38 @@
use bdk::blockchain::{Blockchain, ElectrumBlockchain}; use bdk::blockchain::{Blockchain, ElectrumBlockchain};
use bdk::database::MemoryDatabase; use bdk::database::MemoryDatabase;
use bdk::wallet::AddressIndex; use bdk::wallet::AddressIndex;
use bdk::SyncOptions; use bdk::{descriptor, SyncOptions};
use bdk::{FeeRate, SignOptions, Wallet}; use bdk::{FeeRate, SignOptions, Wallet};
use bitcoin::secp256k1::Secp256k1;
use bitcoin::{Address, Network}; use bitcoin::{Address, Network};
use electrum_client::Client; use electrum_client::Client;
use miniscript::descriptor::DescriptorSecretKey;
use std::error::Error; use std::error::Error;
use std::str::FromStr; use std::str::FromStr;
/// This example shows how to sign and broadcast the transaction for a PSBT (Partially Signed
/// Bitcoin Transaction) for a single key, witness public key hash (WPKH) based descriptor wallet.
/// The electrum protocol is used to sync blockchain data from the testnet bitcoin network and
/// wallet data is stored in an ephemeral in-memory database. The process steps are:
/// 1. Create a "signing" wallet and a "watch-only" wallet based on the same private keys.
/// 2. Deposit testnet funds into the watch only wallet.
/// 3. Sync the watch only wallet and create a spending transaction to return all funds to the testnet faucet.
/// 4. Sync the signing wallet and sign and finalize the PSBT created by the watch only wallet.
/// 5. Broadcast the transactions from the finalized PSBT.
fn main() -> Result<(), Box<dyn Error>> { fn main() -> Result<(), Box<dyn Error>> {
// test keys created with `bdk-cli key generate` and `bdk-cli key derive` commands // test key created with `bdk-cli key generate` and `bdk-cli key derive` commands
let signing_external_descriptor = "wpkh([e9824965/84'/1'/0']tprv8fvem7qWxY3SGCQczQpRpqTKg455wf1zgixn6MZ4ze8gRfHjov5gXBQTadNfDgqs9ERbZZ3Bi1PNYrCCusFLucT39K525MWLpeURjHwUsfX/0/*)"; let external_secret_xkey = DescriptorSecretKey::from_str("[e9824965/84'/1'/0']tprv8fvem7qWxY3SGCQczQpRpqTKg455wf1zgixn6MZ4ze8gRfHjov5gXBQTadNfDgqs9ERbZZ3Bi1PNYrCCusFLucT39K525MWLpeURjHwUsfX/0/*").unwrap();
let signing_internal_descriptor = "wpkh([e9824965/84'/1'/0']tprv8fvem7qWxY3SGCQczQpRpqTKg455wf1zgixn6MZ4ze8gRfHjov5gXBQTadNfDgqs9ERbZZ3Bi1PNYrCCusFLucT39K525MWLpeURjHwUsfX/1/*)"; let internal_secret_xkey = DescriptorSecretKey::from_str("[e9824965/84'/1'/0']tprv8fvem7qWxY3SGCQczQpRpqTKg455wf1zgixn6MZ4ze8gRfHjov5gXBQTadNfDgqs9ERbZZ3Bi1PNYrCCusFLucT39K525MWLpeURjHwUsfX/1/*").unwrap();
let watch_only_external_descriptor = "wpkh([e9824965/84'/1'/0']tpubDCcguXsm6uj79fSQt4V2EF7SF5b26zCuG2ZZNsbNQuw5G9YWSJuGhg2KknQBywRq4VGTu41zYTCh3QeVFyBdbsymgRX9Mrts94SW7obEdqs/0/*)"; let secp = Secp256k1::new();
let watch_only_internal_descriptor = "wpkh([e9824965/84'/1'/0']tpubDCcguXsm6uj79fSQt4V2EF7SF5b26zCuG2ZZNsbNQuw5G9YWSJuGhg2KknQBywRq4VGTu41zYTCh3QeVFyBdbsymgRX9Mrts94SW7obEdqs/1/*)"; let external_public_xkey = external_secret_xkey.as_public(&secp).unwrap();
let internal_public_xkey = internal_secret_xkey.as_public(&secp).unwrap();
let signing_external_descriptor = descriptor!(wpkh(external_secret_xkey)).unwrap();
let signing_internal_descriptor = descriptor!(wpkh(internal_secret_xkey)).unwrap();
let watch_only_external_descriptor = descriptor!(wpkh(external_public_xkey)).unwrap();
let watch_only_internal_descriptor = descriptor!(wpkh(internal_public_xkey)).unwrap();
// create client for Blockstream's testnet electrum server // create client for Blockstream's testnet electrum server
let blockchain = let blockchain =