transactions_test.dart

import 'dart:typed_data';

import 'package:coinslib/src/transaction.dart';
import 'package:test/test.dart';
import 'package:coinslib/src/ecpair.dart';
import 'package:coinslib/src/transaction_builder.dart';
import 'package:coinslib/src/models/networks.dart' as networks;
import 'package:coinslib/src/payments/p2wpkh.dart' show P2WPKH;
import 'package:coinslib/src/payments/multisig.dart' show MultisigScript;
import '../keys.dart';

main() {
  getTxBuilderWithIn() {
    final txb = TransactionBuilder();
    txb.setVersion(1);
    txb.addInput(
      '61d520ccb74288c96bc1a2b20ea1c0d5a704776dd0164a396efec3ea7040349d',
      0,
    );
    return txb;
  }

  test('can create a 1-to-1 Transaction', () {
    final txb = getTxBuilderWithIn();

    txb.addOutput('1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP', BigInt.from(12000));
    // (in)15000 - (out)12000 = (fee)3000, this is the miner fee

    txb.sign(vin: 0, keyPair: aliceKey);

    expect(
      txb.build().toHex(),
      '01000000019d344070eac3fe6e394a16d06d7704a7d5c0a10eb2a2c16bc98842b7cc20d561000000006a4730440220730c3da33eded733722545be42d4a2c456551daabbc7b6de973b79fa4b5247b9022032884d2822201fa2dae1f80b9ed0cb54f186e3576f6e722cf93c1037ef9e8db10121029f50f51d63b345039a290c94bffd3180c99ed659ff6ea6b1242bca47eb93b59fffffffff01e02e0000000000001976a91406afd46bcdfd22ef94ac122aa11f241244a37ecc88ac00000000',
    );
  });

  test('can create a 2-to-2 Transaction', () {
    final txb = TransactionBuilder();
    txb.setVersion(1);
    txb.addInput(
      'b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c',
      6,
    ); // Alice's previous transaction output, has 200000 satoshis
    txb.addInput(
      '7d865e959b2466918c9863afca942d0fb89d7c9ac0c99bafc3749504ded97730',
      0,
    ); // Bob's previous transaction output, has 300000 satoshis
    txb.addOutput('1CUNEBjYrCn2y1SdiUMohaKUi4wpP326Lb', BigInt.from(180000));
    txb.addOutput('1JtK9CQw1syfWj1WtFMWomrYdV3W2tWBF9', BigInt.from(170000));
    // (in)(200000 + 300000) - (out)(180000 + 170000) = (fee)150000, this is the miner fee

    // Bob signs his input, which was the second input (1th)
    txb.sign(vin: 1, keyPair: bobKey);
    // Carol signs her input, which was the first input (0th)
    txb.sign(vin: 0, keyPair: carolKey);

    expect(
      txb.build().toHex(),
      '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',
    );
  });

  test('can create an "null data" Transaction', () {
    final txb = getTxBuilderWithIn();

    txb.addNullOutput('Hey this is a random string without coins');
    //If no other output is set, coins in the input tx gets burned

    txb.sign(vin: 0, keyPair: aliceKey);

    expect(
      txb.build().toHex(),
      '01000000019d344070eac3fe6e394a16d06d7704a7d5c0a10eb2a2c16bc98842b7cc20d561000000006a47304402201c026f4849736e8e126d84637275631e4bb443642b2d17ce4616525543a96e7e022009c6e2c6a54a047f84106b99d66b4cfe45102d21b829ec6d449aaf3df3261e510121029f50f51d63b345039a290c94bffd3180c99ed659ff6ea6b1242bca47eb93b59fffffffff0100000000000000002b6a29486579207468697320697320612072616e646f6d20737472696e6720776974686f757420636f696e7300000000',
    );
  });

  test('can create  a Transaction, w/ a P2WPKH input', () {
    final alice = ECPair.fromWIF(
      'cUNfunNKXNNJDvUvsjxz5tznMR6ob1g5K6oa4WGbegoQD3eqf4am',
      network: networks.testnet,
    );
    final p2wpkh = P2WPKH.fromPublicKey(alice.publicKey!);
    final txb = TransactionBuilder(network: networks.testnet);
    txb.setVersion(1);
    txb.addInput(
      '53676626f5042d42e15313492ab7e708b87559dc0a8c74b7140057af51a2ed5b',
      0,
      null,
      p2wpkh.outputScript,
    ); // Alice's previous transaction output, has 200000 satoshis

    txb.addOutput(
      'tb1qchsmnkk5c8wsjg8vxecmsntynpmkxme0yvh2yt',
      BigInt.from(1000000),
    );
    txb.addOutput(
      'tb1qn40fftdp6z2lvzmsz4s0gyks3gq86y2e8svgap',
      BigInt.from(8995000),
    );

    txb.sign(vin: 0, keyPair: alice, witnessValue: BigInt.from(10000000));
    expect(
      txb.build().toHex(),
      '010000000001015beda251af570014b7748c0adc5975b808e7b72a491353e1422d04f5266667530000000000ffffffff0240420f0000000000160014c5e1b9dad4c1dd0920ec3671b84d649877636f2fb8408900000000001600149d5e94ada1d095f60b701560f412d08a007d115902473044022028dfa12874da651c6fcf01b77162904030fe3b9e1f1067120bf15200bbf8a5500220760f762ba1c3f5353063fa8231d6ccbd44f4e1c1f526017faf8b024eea990ad0012102f9f43a191c6031a5ffae27c5f9911218e78857923284ac1154abc2cc008544b200000000',
    );
  });

  test('can create a P2SH output', () {
    final txb = getTxBuilderWithIn();

    txb.addOutput('31nM1WuowNDzocNxPPW9NQWJEtwWpjfcLj', BigInt.from(1000));
    // Reusing key from above
    txb.sign(vin: 0, keyPair: aliceKey);

    expect(
      txb.build().toHex(),
      '01000000019d344070eac3fe6e394a16d06d7704a7d5c0a10eb2a2c16bc98842b7cc20d561000000006a4730440220094ad6e0c3353d35dee4321bb9ac2bcef7d4de5f6e55715a1f5f580a1720938102202c2777b31b9281e4814320a898f17468db32f05f21f20c569d66c1fb601a27ee0121029f50f51d63b345039a290c94bffd3180c99ed659ff6ea6b1242bca47eb93b59fffffffff01e80300000000000017a9140102030405060708090a0b0c0d0e0f10111213148700000000',
    );
  });

  test('can create a P2WSH output', () {
    final txb = getTxBuilderWithIn();
    txb.addOutput(
      'bc1qqqqsyqcyq5rqwzqfpg9scrgwpugpzysnzs23v9ccrydpk8qarc0szrtjt7',
      BigInt.from(1000),
    );
    txb.sign(vin: 0, keyPair: aliceKey);

    expect(
      txb.build().toHex(),
      '01000000019d344070eac3fe6e394a16d06d7704a7d5c0a10eb2a2c16bc98842b7cc20d561000000006a47304402205cf3fe67ea8eb0fb92dcbc489117834b7cd75c8fa17c12b4a0d4ed59d912ff7a02204ebeecdc9e3d0552b52c7d3b09b7c04110ba9dc7e39181575d38e2bd37bdf35c0121029f50f51d63b345039a290c94bffd3180c99ed659ff6ea6b1242bca47eb93b59fffffffff01e803000000000000220020000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f00000000',
    );
  });

  test('create partial P2WSH and then complete', () {
    // 2-of-2 multisig P2WSH, to be signed twice checking the incomplete
    // builds work

    var txb = getTxBuilderWithIn();
    txb.addOutput('1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP', BigInt.from(12000));

    Uint8List witnessScript = MultisigScript(
      pubkeys: [aliceKey.publicKey!, bobKey.publicKey!],
      threshold: 2,
    ).scriptBytes;

    txb.sign(
      vin: 0,
      keyPair: aliceKey,
      witnessValue: BigInt.from(10000),
      witnessScript: witnessScript,
    );

    // Test building partial
    final partialHex = txb.buildIncomplete().toHex();

    // Recreate from hex and complete transaction
    txb = TransactionBuilder.fromTransaction(Transaction.fromHex(partialHex));

    txb.sign(
      vin: 0,
      keyPair: bobKey,
      witnessValue: BigInt.from(10000),
      witnessScript: witnessScript,
    );

    final hexStr =
        '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';

    final tx = txb.build();

    // Ensure that the transaction has 4 witness items: dummy 0, 2 signatures
    // and the serialised script
    expect(tx.ins[0].witness.length, 4);

    expect(tx.toHex(), hexStr);

    // Should remain the same after decode and encode again
    expect(Transaction.fromBuffer(tx.toBuffer()).toHex(), hexStr);
  });

  Uint8List multisigScript = MultisigScript(
    pubkeys: [aliceKey, bobKey, carolKey, davidKey]
        .map((key) => key.publicKey!)
        .toList(),
    threshold: 3,
  ).scriptBytes;

  TransactionBuilder reencode(TransactionBuilder txb) {
    final encoded = txb.buildIncomplete().toBuffer();
    return TransactionBuilder.fromTransaction(Transaction.fromBuffer(encoded));
  }

  test('sign P2WSH multisig transaction, out of order', () {
    // Sign 3-of-4 with keys 3, 1, 2 on the second input
    // This is a transaction that was successfully tested on peercoin testnet,
    // with the tx hash of
    // 7012f9319c4f65c3544e35688ceccd3621988d2ec19587043cc863b0c493c6e6
    // This was subsequently removed due to a reorg however

    var txb = TransactionBuilder();

    // PPC using v3 txs
    txb.setVersion(3);

    // Output of 180PPC
    txb.addOutput('1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP', BigInt.from(180000000));

    // Add first P2PKH input of 90 PPC
    txb.addInput(
      "fbffd416274f6afb8256a34224aa1600db28944bafd4c5cecb3c3b12cadbceb9",
      0,
    );

    // Add input for multisig address of 100 PPC
    txb.addInput(
      "67f29de2c480a6b18e53b5a2823ad196509bf60dc9a52813d22bfa519db22053",
      1,
    );

    // Sign first input
    txb.sign(vin: 0, keyPair: aliceKey);

    // Out of order signing with encode/decode between each

    void partialSign(ECPair key) {
      txb.sign(
        vin: 1,
        keyPair: key,
        witnessValue: BigInt.from(100000000),
        witnessScript: multisigScript,
      );
      txb = reencode(txb);
    }

    // 3, 1, 2
    partialSign(carolKey);
    partialSign(aliceKey);
    partialSign(bobKey);

    expect(
      txb.build().toHex(),
      "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",
    );
  });

  test('sign P2SH multisig transaction, out of order', () {
    // Sign 3-of-4 with keys 3, 1, 2 on the second input
    // Based upon the P2WSH test but for P2SH instead
    // Successful on testnet: 32c2351fbe4d32ed1290a0c11296505d78a66412c56d08b71f78ce45c9470b6a

    var txb = TransactionBuilder();

    // PPC using v3 txs
    txb.setVersion(3);

    // Output of 180PPC
    txb.addOutput('1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP', BigInt.from(180000000));

    // Add first P2PKH input of 90 PPC
    txb.addInput(
      "cf2a16f174501f657a80312f5599626d54d947e528602dcaf2ed2e8dbe5c7e13",
      1,
    );

    // Add input for P2SH multisig address of 100 PPC
    txb.addInput(
      "9be348a8fd057af563156221c5b56ba1d531dc1283bd03c093c998c9fbefe5d8",
      1,
    );

    // Sign first input
    txb.sign(vin: 0, keyPair: aliceKey);

    // Out of order signing with encode/decode between each

    void partialSign(ECPair key) {
      txb.sign(
        vin: 1,
        keyPair: key,
        redeemScript: multisigScript,
      );
      txb = reencode(txb);
    }

    // 3, 1, 2
    partialSign(carolKey);
    partialSign(aliceKey);
    partialSign(bobKey);

    expect(
      txb.build().toHex(),
      "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",
    );
  });

  test('construct fully comprehensive transcation', () {
    // Constructs a transaction with all supported input and output types that
    // works on Peercoin testnet.
    // Inlcudes P2PKH, P2WPKH and P2WSH, P2SH inputs and outputs.
    // Sucessfully broadcast as 998b85be91d4ec0d877f498c86713c0bdf76d290972e1389d102101cdf179cfc

    var txb = TransactionBuilder();
    txb.setVersion(3);

    // Outputs
    final outAmt = BigInt.from(40000);
    txb.addOutput("1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP", outAmt);
    txb.addOutput("bc1qg7rzlct9ucfp47qdth0paj683mghq4jmg8l7ga", outAmt);
    txb.addOutput(
      "bc1qqk7z8s30kzdn9zwuxxrdmga3txymeljpsc42cdm7khww9xqa8w2qkp0v4s",
      outAmt,
    );
    txb.addOutput("31nM1WuowNDzocNxPPW9NQWJEtwWpjfcLj", outAmt);

    // P2PKH input (alice) 0.01ppc
    txb.addInput(
      "f9fee7c6afb7c72e3852efa362ed65583d551e3cddf63cede2e38bce30bd45e3",
      1,
    );

    // P2SH multisig 0.123456
    txb.addInput(
      "c4379b452f466990833bcad976654e7cd7bee50447c2d8262d6bfbd4c5df8afc",
      1,
    );

    // P2WPKH input (carol) 0.02

    final p2wpkh = P2WPKH.fromPublicKey(carolKey.publicKey!);

    txb.addInput(
      "20afc8511da97fc745f8efc5c2719b92002a608ce7a456b0187b75a2e21625e0",
      1,
      null,
      p2wpkh.outputScript,
    );

    // P2WSH input (alice and bob) 0.031234

    Uint8List witnessScript = MultisigScript(
      pubkeys: [aliceKey.publicKey!, bobKey.publicKey!],
      threshold: 1,
    ).scriptBytes;

    txb.addInput(
      "fc40a69dbcc15601e85a568e3d339315597cc0bbd869df9dd8f0f70646d8c358",
      1,
    );

    // Sign P2PKH
    txb.sign(vin: 0, keyPair: aliceKey);
    // Sign P2SH with 3 keys
    for (final k in [davidKey, aliceKey, carolKey]) {
      txb.sign(vin: 1, keyPair: k, redeemScript: multisigScript);
    }
    // Sign P2WPKH with 0.02ppc
    txb.sign(vin: 2, keyPair: carolKey, witnessValue: BigInt.from(20000));
    // Sign P2WSH with 0.031234ppc
    txb.sign(
      vin: 3,
      keyPair: bobKey,
      witnessValue: BigInt.from(31234),
      witnessScript: witnessScript,
    );

    // Check hex, including after decode and encode again
    final expectHex =
        "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";

    expect(txb.build().toHex(), expectHex);
    expect(Transaction.fromHex(expectHex).toHex(), expectHex);
  });
}