65 lines
2.0 KiB
Rust
65 lines
2.0 KiB
Rust
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// Bitcoin Dev Kit
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// Written in 2020 by Alekos Filini <alekos.filini@gmail.com>
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//
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// Copyright (c) 2020-2021 Bitcoin Dev Kit Developers
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//
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// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
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// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
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// You may not use this file except in accordance with one or both of these
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// licenses.
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//! HWI Signer
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//!
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//! This module contains a simple implementation of a Custom signer for rust-hwi
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use bitcoin::psbt::PartiallySignedTransaction;
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use bitcoin::secp256k1::{All, Secp256k1};
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use bitcoin::util::bip32::Fingerprint;
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use hwi::error::Error;
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use hwi::types::{HWIChain, HWIDevice};
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use hwi::HWIClient;
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use crate::signer::{SignerCommon, SignerError, SignerId, TransactionSigner};
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#[derive(Debug)]
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/// Custom signer for Hardware Wallets
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///
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/// This ignores `sign_options` and leaves the decisions up to the hardware wallet.
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pub struct HWISigner {
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fingerprint: Fingerprint,
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client: HWIClient,
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}
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impl HWISigner {
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/// Create a instance from the specified device and chain
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pub fn from_device(device: &HWIDevice, chain: HWIChain) -> Result<HWISigner, Error> {
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let client = HWIClient::get_client(device, false, chain)?;
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Ok(HWISigner {
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fingerprint: device.fingerprint,
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client,
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})
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}
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}
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impl SignerCommon for HWISigner {
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fn id(&self, _secp: &Secp256k1<All>) -> SignerId {
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SignerId::Fingerprint(self.fingerprint)
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}
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}
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/// This implementation ignores `sign_options`
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impl TransactionSigner for HWISigner {
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fn sign_transaction(
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&self,
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psbt: &mut PartiallySignedTransaction,
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_sign_options: &crate::SignOptions,
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_secp: &crate::wallet::utils::SecpCtx,
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) -> Result<(), SignerError> {
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psbt.combine(self.client.sign_tx(psbt)?.psbt)
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.expect("Failed to combine HW signed psbt with passed PSBT");
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Ok(())
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}
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}
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