257 lines
8.3 KiB
TypeScript
257 lines
8.3 KiB
TypeScript
import * as assert from 'assert';
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import { ECPair } from 'ecpair';
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import { before, describe, it } from 'mocha';
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import * as bitcoin from '../..';
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import { regtestUtils } from './_regtest';
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const regtest = regtestUtils.network;
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const bip65 = require('bip65');
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function toOutputScript(address: string): Buffer {
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return bitcoin.address.toOutputScript(address, regtest);
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}
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function idToHash(txid: string): Buffer {
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return Buffer.from(txid, 'hex').reverse();
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}
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const alice = ECPair.fromWIF(
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'cScfkGjbzzoeewVWmU2hYPUHeVGJRDdFt7WhmrVVGkxpmPP8BHWe',
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regtest,
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);
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const bob = ECPair.fromWIF(
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'cMkopUXKWsEzAjfa1zApksGRwjVpJRB3831qM9W4gKZsLwjHXA9x',
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regtest,
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);
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describe('bitcoinjs-lib (transactions w/ CLTV)', () => {
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// force update MTP
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before(async () => {
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await regtestUtils.mine(11);
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});
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const hashType = bitcoin.Transaction.SIGHASH_ALL;
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interface KeyPair {
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publicKey: Buffer;
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}
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function cltvCheckSigOutput(
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aQ: KeyPair,
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bQ: KeyPair,
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lockTime: number,
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): Buffer {
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return bitcoin.script.fromASM(
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`
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OP_IF
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${bitcoin.script.number.encode(lockTime).toString('hex')}
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OP_CHECKLOCKTIMEVERIFY
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OP_DROP
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OP_ELSE
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${bQ.publicKey.toString('hex')}
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OP_CHECKSIGVERIFY
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OP_ENDIF
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${aQ.publicKey.toString('hex')}
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OP_CHECKSIG
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`
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.trim()
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.replace(/\s+/g, ' '),
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);
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}
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function utcNow(): number {
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return Math.floor(Date.now() / 1000);
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}
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// expiry past, {Alice's signature} OP_TRUE
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it(
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'can create (and broadcast via 3PBP) a Transaction where Alice can redeem ' +
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'the output after the expiry (in the past)',
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async () => {
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// 3 hours ago
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const lockTime = bip65.encode({ utc: utcNow() - 3600 * 3 });
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const redeemScript = cltvCheckSigOutput(alice, bob, lockTime);
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const { address } = bitcoin.payments.p2sh({
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redeem: { output: redeemScript, network: regtest },
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network: regtest,
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});
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// fund the P2SH(CLTV) address
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const unspent = await regtestUtils.faucet(address!, 1e5);
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const tx = new bitcoin.Transaction();
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tx.locktime = lockTime;
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// Note: nSequence MUST be <= 0xfffffffe otherwise LockTime is ignored, and is immediately spendable.
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tx.addInput(idToHash(unspent.txId), unspent.vout, 0xfffffffe);
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tx.addOutput(toOutputScript(regtestUtils.RANDOM_ADDRESS), 7e4);
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// {Alice's signature} OP_TRUE
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const signatureHash = tx.hashForSignature(0, redeemScript, hashType);
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const redeemScriptSig = bitcoin.payments.p2sh({
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redeem: {
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input: bitcoin.script.compile([
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bitcoin.script.signature.encode(
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alice.sign(signatureHash),
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hashType,
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),
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bitcoin.opcodes.OP_TRUE,
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]),
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output: redeemScript,
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},
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}).input;
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tx.setInputScript(0, redeemScriptSig!);
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await regtestUtils.broadcast(tx.toHex());
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await regtestUtils.verify({
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txId: tx.getId(),
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address: regtestUtils.RANDOM_ADDRESS,
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vout: 0,
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value: 7e4,
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});
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},
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);
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// expiry will pass, {Alice's signature} OP_TRUE
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it(
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'can create (and broadcast via 3PBP) a Transaction where Alice can redeem ' +
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'the output after the expiry (in the future)',
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async () => {
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const height = await regtestUtils.height();
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// 5 blocks from now
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const lockTime = bip65.encode({ blocks: height + 5 });
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const redeemScript = cltvCheckSigOutput(alice, bob, lockTime);
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const { address } = bitcoin.payments.p2sh({
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redeem: { output: redeemScript, network: regtest },
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network: regtest,
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});
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// fund the P2SH(CLTV) address
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const unspent = await regtestUtils.faucet(address!, 1e5);
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const tx = new bitcoin.Transaction();
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tx.locktime = lockTime;
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// Note: nSequence MUST be <= 0xfffffffe otherwise LockTime is ignored, and is immediately spendable.
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tx.addInput(idToHash(unspent.txId), unspent.vout, 0xfffffffe);
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tx.addOutput(toOutputScript(regtestUtils.RANDOM_ADDRESS), 7e4);
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// {Alice's signature} OP_TRUE
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const signatureHash = tx.hashForSignature(0, redeemScript, hashType);
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const redeemScriptSig = bitcoin.payments.p2sh({
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redeem: {
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input: bitcoin.script.compile([
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bitcoin.script.signature.encode(
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alice.sign(signatureHash),
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hashType,
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),
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bitcoin.opcodes.OP_TRUE,
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]),
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output: redeemScript,
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},
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}).input;
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tx.setInputScript(0, redeemScriptSig!);
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// TODO: test that it failures _prior_ to expiry, unfortunately, race conditions when run concurrently
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// ...
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// into the future!
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await regtestUtils.mine(5);
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await regtestUtils.broadcast(tx.toHex());
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await regtestUtils.verify({
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txId: tx.getId(),
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address: regtestUtils.RANDOM_ADDRESS,
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vout: 0,
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value: 7e4,
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});
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},
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);
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// expiry ignored, {Bob's signature} {Alice's signature} OP_FALSE
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it(
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'can create (and broadcast via 3PBP) a Transaction where Alice and Bob can ' +
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'redeem the output at any time',
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async () => {
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// two hours ago
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const lockTime = bip65.encode({ utc: utcNow() - 3600 * 2 });
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const redeemScript = cltvCheckSigOutput(alice, bob, lockTime);
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const { address } = bitcoin.payments.p2sh({
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redeem: { output: redeemScript, network: regtest },
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network: regtest,
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});
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// fund the P2SH(CLTV) address
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const unspent = await regtestUtils.faucet(address!, 2e5);
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const tx = new bitcoin.Transaction();
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tx.locktime = lockTime;
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// Note: nSequence MUST be <= 0xfffffffe otherwise LockTime is ignored, and is immediately spendable.
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tx.addInput(idToHash(unspent.txId), unspent.vout, 0xfffffffe);
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tx.addOutput(toOutputScript(regtestUtils.RANDOM_ADDRESS), 8e4);
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// {Alice's signature} {Bob's signature} OP_FALSE
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const signatureHash = tx.hashForSignature(0, redeemScript, hashType);
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const redeemScriptSig = bitcoin.payments.p2sh({
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redeem: {
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input: bitcoin.script.compile([
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bitcoin.script.signature.encode(
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alice.sign(signatureHash),
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hashType,
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),
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bitcoin.script.signature.encode(bob.sign(signatureHash), hashType),
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bitcoin.opcodes.OP_FALSE,
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]),
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output: redeemScript,
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},
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}).input;
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tx.setInputScript(0, redeemScriptSig!);
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await regtestUtils.broadcast(tx.toHex());
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await regtestUtils.verify({
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txId: tx.getId(),
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address: regtestUtils.RANDOM_ADDRESS,
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vout: 0,
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value: 8e4,
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});
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},
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);
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// expiry in the future, {Alice's signature} OP_TRUE
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it(
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'can create (but fail to broadcast via 3PBP) a Transaction where Alice ' +
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'attempts to redeem before the expiry',
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async () => {
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// two hours from now
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const lockTime = bip65.encode({ utc: utcNow() + 3600 * 2 });
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const redeemScript = cltvCheckSigOutput(alice, bob, lockTime);
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const { address } = bitcoin.payments.p2sh({
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redeem: { output: redeemScript, network: regtest },
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network: regtest,
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});
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// fund the P2SH(CLTV) address
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const unspent = await regtestUtils.faucet(address!, 2e4);
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const tx = new bitcoin.Transaction();
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tx.locktime = lockTime;
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// Note: nSequence MUST be <= 0xfffffffe otherwise LockTime is ignored, and is immediately spendable.
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tx.addInput(idToHash(unspent.txId), unspent.vout, 0xfffffffe);
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tx.addOutput(toOutputScript(regtestUtils.RANDOM_ADDRESS), 1e4);
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// {Alice's signature} OP_TRUE
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const signatureHash = tx.hashForSignature(0, redeemScript, hashType);
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const redeemScriptSig = bitcoin.payments.p2sh({
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redeem: {
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input: bitcoin.script.compile([
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bitcoin.script.signature.encode(
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alice.sign(signatureHash),
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hashType,
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),
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bitcoin.script.signature.encode(bob.sign(signatureHash), hashType),
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bitcoin.opcodes.OP_TRUE,
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]),
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output: redeemScript,
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},
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}).input;
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tx.setInputScript(0, redeemScriptSig!);
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await regtestUtils.broadcast(tx.toHex()).catch(err => {
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assert.throws(() => {
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if (err) throw err;
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}, /Error: non-final/);
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});
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},
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);
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});
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