example_elements.js

const cfdjs = require('cfd-js-wasm');

cfdjs.addInitializedListener(async () => {
  const cfdjsObj = cfdjs.getCfd();

  const utxo = {txid: '0000000000000000000000000000000000000000000000000000000000001111', vout: 0};
  const utxo2 = {txid: '0000000000000000000000000000000000000000000000000000000000002222', vout: 0};

  const txdata = await cfdjsObj.ElementsCreateRawTransaction({
    'version': 2,
    'locktime': 0,
    'txins': [{
      'txid': utxo.txid,
      'vout': utxo.vout,
      'sequence': 4294967295,
    }, {
      'txid': utxo2.txid,
      'vout': utxo2.vout,
      'sequence': 4294967295,
    }],
    'txouts': [{
      'address': 'AzptfproXqXSz52kFUDAN4WJe3nVkxyapTkVkmN67Jmw4isdLWXrXF4jcF3354LcaQ5ZsBrvRmvWUz73',
      'asset': '6f1a4b6bd5571b5f08ab79c314dc6483f9b952af2f5ef206cd6f8e68eb1186f3',
      'amount': 10000000,
    }, {
      'address': 'el1qqtl9a3n6878ex25u0wv8u5qlzpfkycc0cftk65t52pkauk55jqka0fajk8d80lafn4t9kqxe77cu9ez2dyr6sq54lwy009uex',
      'asset': '6f1a4b6bd5571b5f08ab79c314dc6483f9b952af2f5ef206cd6f8e68eb1186f3',
      'amount': 10000000,
    }],
    'fee': {
      'amount': 500000,
      'asset': '6f1a4b6bd5571b5f08ab79c314dc6483f9b952af2f5ef206cd6f8e68eb1186f3',
    },
  });

  const blindTx = await cfdjsObj.BlindRawTransaction({
    tx: txdata.hex,
    txins: [{
      txid: utxo.txid,
      vout: utxo.vout,
      asset: '6f1a4b6bd5571b5f08ab79c314dc6483f9b952af2f5ef206cd6f8e68eb1186f3',
      amount: 10500000,
      blindFactor: '0000000000000000000000000000000000000000000000000000000000000000',
      assetBlindFactor: '0000000000000000000000000000000000000000000000000000000000000000',
    }, {
      txid: utxo2.txid,
      vout: utxo2.vout,
      asset: '6f1a4b6bd5571b5f08ab79c314dc6483f9b952af2f5ef206cd6f8e68eb1186f3',
      amount: 10000000,
      blindFactor: 'f87734c279533d8beba96c5369e169e6caf5f307a34d72d4a0f9c9a7b8f8f269',
      assetBlindFactor: '28093061ab2e407c6015f8cb33f337ffb118eaf3beb2d254de64203aa27ecbf7',
    },
    ],
    txoutConfidentialAddresses: [
      'AzptfproXqXSz52kFUDAN4WJe3nVkxyapTkVkmN67Jmw4isdLWXrXF4jcF3354LcaQ5ZsBrvRmvWUz73',
      'el1qqtl9a3n6878ex25u0wv8u5qlzpfkycc0cftk65t52pkauk55jqka0fajk8d80lafn4t9kqxe77cu9ez2dyr6sq54lwy009uex',
    ],
  });

  // privkey sign (calc sighash + get ecSig + add Signature)
  const signTx = await cfdjsObj.SignWithPrivkey({
    tx: blindTx.hex,
    isElements: true,
    txin: {
      txid: utxo.txid,
      vout: utxo.vout,
      privkey: 'cU4KjNUT7GjHm7CkjRjG46SzLrXHXoH3ekXmqa2jTCFPMkQ64sw1',
      hashType: 'p2wpkh',
      sighashType: 'all',
      confidentialValueCommitment: '096c711e318b1b540f683aa3ed570c571889417483979e24403e47d8be7c2ac664',
      amount: 10500000,
    },
  });

  // multisig sign start
  const multisigScript = '5221021266577a886f59271acc99d78a3371c04fbd0e1991cb52db6d74b090c96ed47d2103700c35bbe646ac4e80a02f5688d7fe36f944d7eeb7abe0490c272e9fd3e093ac52ae';
  // ert1q7w0kyu46ddterr4sglzac38mgaf4dv8jfsf0egumry5yaqqq3fpqe89kmh
  const sighash = await cfdjsObj.CreateElementsSignatureHash({
    tx: blindTx.hex,
    txin: {
      'txid': utxo2.txid,
      'vout': utxo2.vout,
      'keyData': {
        'hex': multisigScript,
        'type': 'redeem_script',
      },
      'amount': 10000000,
      'hashType': 'p2wsh',
    },
  });


  const privkey1 = 'cQfvmeis4EWJ4EtLoz5dAs8XY44SCdZazyTnyPVgibMWcYZCSEne';
  const privkey2 = 'cN3qiuWdpPWKsEjFxnkiNdex3nRYENzuieSH6MsYBCk6oyKdfdeo';
  const sig1 = await cfdjsObj.CalculateEcSignature({
    'sighash': sighash.sighash,
    'privkeyData': {
      'privkey': privkey1,
      'network': 'regtest',
    },
  });
  const sig2 = await cfdjsObj.CalculateEcSignature({
    'sighash': sighash.sighash,
    'privkeyData': {
      'privkey': privkey2,
      'network': 'regtest',
    },
  });

  const multisigSign = await cfdjsObj.AddMultisigSign({
    tx: signTx.hex,
    isElements: true,
    txin: {
      txid: utxo2.txid,
      vout: utxo2.vout,
      signParams: [
        {
          hex: sig1.signature,
          type: 'sign',
          derEncode: true,
          relatedPubkey: '021266577a886f59271acc99d78a3371c04fbd0e1991cb52db6d74b090c96ed47d',
        },
        {
          hex: sig2.signature,
          type: 'sign',
          derEncode: true,
          relatedPubkey: '03700c35bbe646ac4e80a02f5688d7fe36f944d7eeb7abe0490c272e9fd3e093ac',
        },
      ],
      witnessScript: multisigScript,
      hashType: 'p2wsh',
    },
  });
  // multisig sign end

  console.log(multisigSign.hex);

  console.log('-------------------------------------------------------------------');
  console.log('-- large output tx --');

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const networkType = 'liquidv1';
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const mainchainNetworkType = 'mainnet';
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const masterBlindingKey = '28054244faf0d4a04fc9dd3012443fc126c4a353f48d0277d3c57f69164adf87';
  // dust laptop safe error tent soon fragile skill pear alley awkward vague stomach duck future
  // xprv9s21ZrQH143K39sCCERa3w6NuVmYLMxHKH1PjEnuiaq2RB9iHhEwncTGpbx1WANWJZzFFbFdBi7BKECLg3HnFgajeRi5Go6YxD1K2nZtpDB/44h/1776h/1h
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const baseXpubkey = 'xpub6CADKiKYZrFrmFbPAQPSrzKMRohBHNmYM7GHNngAaaVHqNhC3apR1aNKJkigUjBDU7HwciQSRjeBK42vZUMZGNEjZkPjDWDawKVxTLGhNVE';
  const minimumBits = 36;

  // ----

  const utxoTxHex = '';
  const utxoTxid = '';
  const utxoVout = 0;

  const ctAddrList = [
  ];

  const feeOutputNum = 49;
  const txFeeAmount = 4476; // feerate: 0.148
  const feeRate = 0.100;

  const unblindData = await cfdjsObj.UnblindRawTransaction({
    tx: utxoTxHex,
    txouts: [{
      index: 0,
      blindingKey: '',
    }],
  });

  console.log(unblindData);
  const utxoData = unblindData.outputs[0];

  const feeUtxo = {
    txid: utxoTxid,
    vout: utxoVout,
    amount: utxoData.amount,
    asset: utxoData.asset,
    blindFactor: utxoData.blindFactor,
    assetBlindFactor: utxoData.assetBlindFactor,
    privkey: '',
  };


  // const feeAmount = parseInt((feeUtxo.amount - txFeeAmount) / (feeOutputNum + 1));
  const feeAmount = 100000;
  const changeAmount =
    feeUtxo.amount - txFeeAmount - (feeAmount * feeOutputNum);
  const isBlind = true;

  const txoutList = [];

  for (let i = 0; i <= feeOutputNum; ++i) {
    const ctAddr = ctAddrList[i];
    const amount = (i === feeOutputNum) ? changeAmount : feeAmount;
    txoutList.push({
      // address: ctAddr.confidentialAddress,
      address: ctAddr,
      asset: feeUtxo.asset,
      amount: amount,
    });
    // ctAddrList.push(ctAddr.confidentialAddress);
  }

  const feeTxdata = await cfdjsObj.ElementsCreateRawTransaction({
    version: 2,
    locktime: 0,
    txins: [{
      txid: feeUtxo.txid,
      vout: feeUtxo.vout,
      sequence: 4294967295,
    }],
    txouts: txoutList,
    fee: {
      amount: txFeeAmount,
      asset: feeUtxo.asset,
    },
  });

  let blindTxHex = feeTxdata.hex;
  if (isBlind) {
    const basetx = await cfdjsObj.ElementsDecodeRawTransaction({
      hex: feeTxdata.hex,
    });
    console.log(basetx);
    const feeBlindTx = await cfdjsObj.BlindRawTransaction({
      tx: feeTxdata.hex,
      txins: [{
        txid: feeUtxo.txid,
        vout: feeUtxo.vout,
        asset: feeUtxo.asset,
        amount: feeUtxo.amount,
        blindFactor: feeUtxo.blindFactor,
        assetBlindFactor: feeUtxo.assetBlindFactor,
      },
      ],
      txoutConfidentialAddresses: ctAddrList,
      minimumBits: minimumBits,
    });
    blindTxHex = feeBlindTx.hex;
  }


  const commitment = await cfdjsObj.GetCommitment({
    amount: feeUtxo.amount,
    asset: feeUtxo.asset,
    assetBlindFactor: feeUtxo.assetBlindFactor,
    blindFactor: feeUtxo.blindFactor,
  });

  // privkey sign (calc sighash + get ecSig + add Signature)
  const feeSignTx = await cfdjsObj.SignWithPrivkey({
    tx: blindTxHex,
    isElements: true,
    txin: {
      txid: feeUtxo.txid,
      vout: feeUtxo.vout,
      privkey: feeUtxo.privkey,
      hashType: 'p2wpkh',
      sighashType: 'all',
      confidentialValueCommitment: commitment.amountCommitment,
    },
  });

  const dectx = await cfdjsObj.ElementsDecodeRawTransaction({
    hex: feeSignTx.hex,
  });

  console.log(feeSignTx.hex);
  console.log(`Amount:${feeAmount}, changeAmount:${changeAmount}`);
  console.log(`vsize: ${dectx.vsize}`);
  console.log(`dectx:`, dectx);

  const estimateFeeResult = await cfdjsObj.EstimateFee({
    selectUtxos: [{
      txid: feeUtxo.txid,
      vout: feeUtxo.vout,
      amount: feeUtxo.amount,
      asset: feeUtxo.asset,
      descriptor: 'wpkh([e3c39d64/0\'/1\'/14\']02c7822c824258258d8d16b6fd25317b60b4374ca4f5ce1a69b810615e0c5497a8)',
    }],
    feeRate: feeRate,
    tx: feeSignTx.hex,
    isElements: true,
    feeAsset: feeUtxo.asset,
    isBlind: true,
    minimumBits: minimumBits,
  });
  console.log(`EstimateFee:`, estimateFeeResult);
});