chaingate

Version:
A complete TypeScript library for connecting to and making transactions on different blockchains
37 lines • 1.63 kB
JavaScript
import { hexToBytes } from '../../../../InternalUtils/Utils';
import * as btc from '@scure/btc-signer';
import { OutScript } from '@scure/btc-signer';
import { UtxoTransaction } from '../UtxoWallet/UtxoTransaction';
import { toSatoshi } from '../UtxoWallet/utils';
export class LegacyUtxoPreparedTransaction extends UtxoTransaction {
    constructor(utils, fromAddress, toAddress, amount, networkParams, privateKeyProvider) {
        super(utils, fromAddress, toAddress, amount, networkParams, privateKeyProvider);
    }
    async sign(inputs, outputs) {
        const txVins = inputs.map((vin) => ({
            txid: hexToBytes(vin.txid),
            index: vin.n,
            witnessUtxo: {
                script: vin.script,
                amount: BigInt(toSatoshi(vin.amount.toString()).toString()),
            },
        }));
        const txVouts = outputs.map((vout) => ({
            script: OutScript.encode(btc.Address(this.networkParams).decode(vout.address)),
            amount: BigInt(toSatoshi(vout.amount).toString()),
        }));
        const transaction = new btc.Transaction({
            allowLegacyWitnessUtxo: true,
        });
        for (const txVin of txVins)
            transaction.addInput(txVin);
        for (const txVout of txVouts)
            transaction.addOutput(txVout);
        const privateKeyRaw = (await this.privateKeyProvider()).raw;
        for (let i = 0; i < transaction.inputsLength; i++)
            transaction.signIdx(privateKeyRaw, i);
        transaction.finalize();
        return hexToBytes(transaction.hex);
    }
}
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