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https://github.com/BlueWallet/BlueWallet.git
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74 lines
2.7 KiB
JavaScript
74 lines
2.7 KiB
JavaScript
import { LegacyWallet } from './legacy-wallet';
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const bitcoin = require('bitcoinjs-lib');
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const signer = require('../models/signer');
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const BigNumber = require('bignumber.js');
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export class SegwitP2SHWallet extends LegacyWallet {
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constructor() {
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super();
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this.type = 'segwitP2SH';
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}
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getTypeReadable() {
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return 'SegWit (P2SH)';
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}
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static witnessToAddress(witness) {
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const pubKey = Buffer.from(witness, 'hex');
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const pubKeyHash = bitcoin.crypto.hash160(pubKey);
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const redeemScript = bitcoin.script.witnessPubKeyHash.output.encode(pubKeyHash);
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const redeemScriptHash = bitcoin.crypto.hash160(redeemScript);
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const scriptPubkey = bitcoin.script.scriptHash.output.encode(redeemScriptHash);
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return bitcoin.address.fromOutputScript(scriptPubkey, bitcoin.networks.bitcoin);
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}
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getAddress() {
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if (this._address) return this._address;
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let address;
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try {
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let keyPair = bitcoin.ECPair.fromWIF(this.secret);
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let pubKey = keyPair.getPublicKeyBuffer();
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let witnessScript = bitcoin.script.witnessPubKeyHash.output.encode(bitcoin.crypto.hash160(pubKey));
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let scriptPubKey = bitcoin.script.scriptHash.output.encode(bitcoin.crypto.hash160(witnessScript));
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address = bitcoin.address.fromOutputScript(scriptPubKey);
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} catch (err) {
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return false;
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}
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this._address = address;
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return this._address;
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}
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/**
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* Takes UTXOs (as presented by blockcypher api), transforms them into
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* format expected by signer module, creates tx and returns signed string txhex.
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*
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* @param utxos Unspent outputs, expects blockcypher format
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* @param amount
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* @param fee
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* @param address
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* @param memo
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* @param sequence By default zero. Increased with each transaction replace.
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* @return string Signed txhex ready for broadcast
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*/
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createTx(utxos, amount, fee, address, memo, sequence) {
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// TODO: memo is not used here, get rid of it
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if (sequence === undefined) {
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sequence = 0;
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}
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// transforming UTXOs fields to how module expects it
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for (let u of utxos) {
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u.confirmations = 6; // hack to make module accept 0 confirmations
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u.txid = u.tx_hash;
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u.vout = u.tx_output_n;
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u.amount = new BigNumber(u.value);
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u.amount = u.amount.div(100000000);
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u.amount = u.amount.toString(10);
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}
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console.log('creating tx ', amount, ' with fee ', fee, 'secret=', this.getSecret(), 'from address', this.getAddress());
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let amountPlusFee = parseFloat(new BigNumber(amount).add(fee).toString(10));
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// to compensate that module substracts fee from amount
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return signer.createSegwitTransaction(utxos, address, amountPlusFee, fee, this.getSecret(), this.getAddress(), sequence);
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}
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}
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