88 lines
2.7 KiB
Rust
88 lines
2.7 KiB
Rust
use std::str::FromStr;
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use bdk::bitcoin::util::bip32::ExtendedPrivKey;
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use bdk::bitcoin::Network;
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use bdk::blockchain::{Blockchain, ElectrumBlockchain};
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use bdk::database::MemoryDatabase;
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use bdk::template::Bip84;
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use bdk::wallet::export::FullyNodedExport;
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use bdk::{KeychainKind, SyncOptions, Wallet};
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use bdk::electrum_client::Client;
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use bdk::wallet::AddressIndex;
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use bitcoin::util::bip32;
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pub mod utils;
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use crate::utils::tx::build_signed_tx;
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/// This will create a wallet from an xpriv and get the balance by connecting to an Electrum server.
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/// If enough amount is available, this will send a transaction to an address.
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/// Otherwise, this will display a wallet address to receive funds.
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///
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/// This can be run with `cargo run --example electrum_backend` in the root folder.
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fn main() {
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let network = Network::Testnet;
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let xpriv = "tprv8ZgxMBicQKsPcx5nBGsR63Pe8KnRUqmbJNENAfGftF3yuXoMMoVJJcYeUw5eVkm9WBPjWYt6HMWYJNesB5HaNVBaFc1M6dRjWSYnmewUMYy";
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let electrum_url = "ssl://electrum.blockstream.info:60002";
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run(&network, electrum_url, xpriv);
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}
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fn create_wallet(network: &Network, xpriv: &ExtendedPrivKey) -> Wallet<MemoryDatabase> {
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Wallet::new(
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Bip84(*xpriv, KeychainKind::External),
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Some(Bip84(*xpriv, KeychainKind::Internal)),
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*network,
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MemoryDatabase::default(),
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)
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.unwrap()
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}
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fn run(network: &Network, electrum_url: &str, xpriv: &str) {
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let xpriv = bip32::ExtendedPrivKey::from_str(xpriv).unwrap();
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// Apparently it works only with Electrs (not EletrumX)
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let blockchain = ElectrumBlockchain::from(Client::new(electrum_url).unwrap());
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let wallet = create_wallet(network, &xpriv);
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wallet.sync(&blockchain, SyncOptions::default()).unwrap();
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let address = wallet.get_address(AddressIndex::New).unwrap().address;
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println!("address: {}", address);
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let balance = wallet.get_balance().unwrap();
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println!("Available coins in BDK wallet : {} sats", balance);
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if balance.confirmed > 6500 {
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// the wallet sends the amount to itself.
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let recipient_address = wallet
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.get_address(AddressIndex::New)
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.unwrap()
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.address
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.to_string();
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let amount = 5359;
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let tx = build_signed_tx(&wallet, &recipient_address, amount);
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blockchain.broadcast(&tx).unwrap();
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println!("tx id: {}", tx.txid());
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} else {
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println!("Insufficient Funds. Fund the wallet with the address above");
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}
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let export = FullyNodedExport::export_wallet(&wallet, "exported wallet", true)
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.map_err(ToString::to_string)
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.map_err(bdk::Error::Generic)
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.unwrap();
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println!("------\nWallet Backup: {}", export.to_string());
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}
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