bitcoinjs-lib/ts_test/integration/csv.ts

import * as bitcoin from '../..';
import { network as regtest } from './_regtest';
import * as regtestUtils from './_regtest';
const { describe, it, before } = require('mocha');
const assert = require('assert');
const bip68 = require('bip68');

const alice = bitcoin.ECPair.fromWIF(
  'cScfkGjbzzoeewVWmU2hYPUHeVGJRDdFt7WhmrVVGkxpmPP8BHWe',
  regtest,
);
const bob = bitcoin.ECPair.fromWIF(
  'cMkopUXKWsEzAjfa1zApksGRwjVpJRB3831qM9W4gKZsLwjHXA9x',
  regtest,
);

describe('bitcoinjs-lib (transactions w/ CSV)', () => {
  // force update MTP
  // @ts-ignore
  before(async () => {
    await regtestUtils.mine(11);
  });

  const hashType = bitcoin.Transaction.SIGHASH_ALL;

  // IF MTP (from when confirmed) > seconds, aQ can redeem
  function csvCheckSigOutput(aQ, bQ, sequence): Buffer {
    return bitcoin.script.compile([
      bitcoin.opcodes.OP_IF,
      bitcoin.script.number.encode(sequence),
      bitcoin.opcodes.OP_CHECKSEQUENCEVERIFY,
      bitcoin.opcodes.OP_DROP,

      bitcoin.opcodes.OP_ELSE,
      bQ.publicKey,
      bitcoin.opcodes.OP_CHECKSIGVERIFY,
      bitcoin.opcodes.OP_ENDIF,

      aQ.publicKey,
      bitcoin.opcodes.OP_CHECKSIG,
    ]);
  }

  // expiry will pass, {Alice's signature} OP_TRUE
  it(
    'can create (and broadcast via 3PBP) a Transaction where ' +
      'Alice can redeem the output after the expiry (in the future)',
    // @ts-ignore
    async () => {
      // 5 blocks from now
      const sequence = bip68.encode({ blocks: 5 });
      const p2sh = bitcoin.payments.p2sh({
        redeem: {
          output: csvCheckSigOutput(alice, bob, sequence),
        },
        network: regtest,
      });

      // fund the P2SH(CSV) address
      const unspent = await regtestUtils.faucet(p2sh.address, 1e5);

      const txb = new bitcoin.TransactionBuilder(regtest);
      txb.addInput(unspent.txId, unspent.vout, sequence);
      txb.addOutput(regtestUtils.RANDOM_ADDRESS, 7e4);

      // {Alice's signature} OP_TRUE
      const tx = txb.buildIncomplete();
      const signatureHash = tx.hashForSignature(
        0,
        p2sh.redeem.output,
        hashType,
      );
      const redeemScriptSig = bitcoin.payments.p2sh({
        network: regtest,
        redeem: {
          network: regtest,
          output: p2sh.redeem.output,
          input: bitcoin.script.compile([
            bitcoin.script.signature.encode(
              alice.sign(signatureHash),
              hashType,
            ),
            bitcoin.opcodes.OP_TRUE,
          ]),
        },
      }).input;
      tx.setInputScript(0, redeemScriptSig);

      // TODO: test that it failures _prior_ to expiry, unfortunately, race conditions when run concurrently
      // ...
      // into the future!
      await regtestUtils.mine(10);

      await regtestUtils.broadcast(tx.toHex());

      await regtestUtils.verify({
        txId: tx.getId(),
        address: regtestUtils.RANDOM_ADDRESS,
        vout: 0,
        value: 7e4,
      });
    },
  );

  // expiry in the future, {Alice's signature} OP_TRUE
  it(
    'can create (but fail to broadcast via 3PBP) a Transaction where ' +
      'Alice attempts to redeem before the expiry',
    // @ts-ignore
    async () => {
      // two hours after confirmation
      const sequence = bip68.encode({ seconds: 7168 });
      const p2sh = bitcoin.payments.p2sh({
        network: regtest,
        redeem: {
          output: csvCheckSigOutput(alice, bob, sequence),
        },
      });

      // fund the P2SH(CSV) address
      const unspent = await regtestUtils.faucet(p2sh.address, 2e4);

      const txb = new bitcoin.TransactionBuilder(regtest);
      txb.addInput(unspent.txId, unspent.vout, sequence);
      txb.addOutput(regtestUtils.RANDOM_ADDRESS, 1e4);

      // {Alice's signature} OP_TRUE
      const tx = txb.buildIncomplete();
      const signatureHash = tx.hashForSignature(
        0,
        p2sh.redeem.output,
        hashType,
      );
      const redeemScriptSig = bitcoin.payments.p2sh({
        network: regtest,
        redeem: {
          network: regtest,
          output: p2sh.redeem.output,
          input: bitcoin.script.compile([
            bitcoin.script.signature.encode(
              alice.sign(signatureHash),
              hashType,
            ),
            bitcoin.script.signature.encode(bob.sign(signatureHash), hashType),
            bitcoin.opcodes.OP_TRUE,
          ]),
        },
      }).input;
      tx.setInputScript(0, redeemScriptSig);

      await regtestUtils.broadcast(tx.toHex()).catch(err => {
        assert.throws(() => {
          if (err) throw err;
        }, /Error: non-BIP68-final \(code 64\)/);
      });
    },
  );
});

// @ts-ignore
export {};