94 lines
2.9 KiB
Rust
94 lines
2.9 KiB
Rust
use bdk::{
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bitcoin::{Address, Network},
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wallet::AddressIndex,
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SignOptions, Wallet,
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};
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use bdk_esplora::esplora_client;
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use bdk_esplora::EsploraExt;
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use bdk_file_store::KeychainStore;
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use std::{io::Write, str::FromStr};
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const SEND_AMOUNT: u64 = 5000;
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const STOP_GAP: usize = 50;
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const PARALLEL_REQUESTS: usize = 5;
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let db_path = std::env::temp_dir().join("bdk-esplora-example");
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let db = KeychainStore::new_from_path(db_path)?;
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let external_descriptor = "wpkh(tprv8ZgxMBicQKsPdy6LMhUtFHAgpocR8GC6QmwMSFpZs7h6Eziw3SpThFfczTDh5rW2krkqffa11UpX3XkeTTB2FvzZKWXqPY54Y6Rq4AQ5R8L/84'/0'/0'/0/*)";
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let internal_descriptor = "wpkh(tprv8ZgxMBicQKsPdy6LMhUtFHAgpocR8GC6QmwMSFpZs7h6Eziw3SpThFfczTDh5rW2krkqffa11UpX3XkeTTB2FvzZKWXqPY54Y6Rq4AQ5R8L/84'/0'/0'/1/*)";
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let mut wallet = Wallet::new(
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external_descriptor,
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Some(internal_descriptor),
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db,
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Network::Testnet,
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)?;
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let address = wallet.get_address(AddressIndex::New);
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println!("Generated Address: {}", address);
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let balance = wallet.get_balance();
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println!("Wallet balance before syncing: {} sats", balance.total());
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print!("Syncing...");
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// Scanning the chain...
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let esplora_url = "https://mempool.space/testnet/api";
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let client = esplora_client::Builder::new(esplora_url).build_blocking()?;
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let checkpoints = wallet.checkpoints();
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let spks = wallet
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.spks_of_all_keychains()
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.into_iter()
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.map(|(k, spks)| {
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let mut first = true;
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(
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k,
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spks.inspect(move |(spk_i, _)| {
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if first {
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first = false;
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print!("\nScanning keychain [{:?}]:", k);
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}
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print!(" {}", spk_i);
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let _ = std::io::stdout().flush();
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}),
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)
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})
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.collect();
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let update = client.scan(
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checkpoints,
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spks,
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core::iter::empty(),
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core::iter::empty(),
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STOP_GAP,
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PARALLEL_REQUESTS,
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)?;
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println!();
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wallet.apply_update(update)?;
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wallet.commit()?;
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let balance = wallet.get_balance();
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println!("Wallet balance after syncing: {} sats", balance.total());
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if balance.total() == 0 {
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println!("Please send some coins to the receiving address");
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std::process::exit(0);
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}
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let faucet_address = Address::from_str("mkHS9ne12qx9pS9VojpwU5xtRd4T7X7ZUt")?;
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let mut tx_builder = wallet.build_tx();
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tx_builder
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.add_recipient(faucet_address.script_pubkey(), SEND_AMOUNT)
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.enable_rbf();
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let (mut psbt, _) = tx_builder.finish()?;
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let finalized = wallet.sign(&mut psbt, SignOptions::default())?;
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assert!(finalized);
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let tx = psbt.extract_tx();
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client.broadcast(&tx)?;
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println!("Tx broadcasted! Txid: {}", tx.txid());
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Ok(())
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}
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