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@bitgo/utxo-lib

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Client-side Bitcoin JavaScript library

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"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.VALUE_INT64_ZERO = void 0; exports.readInputs = readInputs; exports.readOutputs = readOutputs; exports.readEmptyVector = readEmptyVector; exports.readEmptyOrchardBundle = readEmptyOrchardBundle; exports.writeEmptyOrchardBundle = writeEmptyOrchardBundle; exports.readEmptySaplingBundle = readEmptySaplingBundle; exports.writeEmptySamplingBundle = writeEmptySamplingBundle; exports.fromBufferV4 = fromBufferV4; exports.fromBufferV5 = fromBufferV5; exports.writeInputs = writeInputs; exports.writeOutputs = writeOutputs; exports.toBufferV4 = toBufferV4; exports.toBufferV5 = toBufferV5; const ZcashTransaction_1 = require("./ZcashTransaction"); exports.VALUE_INT64_ZERO = Buffer.from('0000000000000000', 'hex'); function readInputs(bufferReader) { const vinLen = bufferReader.readVarInt(); const ins = []; for (let i = 0; i < vinLen; ++i) { ins.push({ hash: bufferReader.readSlice(32), index: bufferReader.readUInt32(), script: bufferReader.readVarSlice(), sequence: bufferReader.readUInt32(), witness: [], }); } return ins; } function readOutputs(bufferReader, amountType = 'number') { const voutLen = bufferReader.readVarInt(); const outs = []; for (let i = 0; i < voutLen; ++i) { outs.push({ value: (amountType === 'bigint' ? bufferReader.readUInt64BigInt() : bufferReader.readUInt64()), script: bufferReader.readVarSlice(), }); } return outs; } function readEmptyVector(bufferReader) { const n = bufferReader.readVarInt(); if (n !== 0) { throw new ZcashTransaction_1.UnsupportedTransactionError(`expected empty vector`); } } function readEmptyOrchardBundle(bufferReader) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/orchard.h#L66 // https://github.com/zcash/librustzcash/blob/edcde252de221d4851f1e5145306c2caf95453bc/zcash_primitives/src/transaction/components/orchard.rs#L36 const v = bufferReader.readUInt8(); if (v !== 0x00) { throw new ZcashTransaction_1.UnsupportedTransactionError(`expected byte 0x00`); } } function writeEmptyOrchardBundle(bufferWriter) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/orchard.h#L66 // https://github.com/zcash/librustzcash/blob/edcde252de221d4851f1e5145306c2caf95453bc/zcash_primitives/src/transaction/components/orchard.rs#L201 bufferWriter.writeUInt8(0); } function readEmptySaplingBundle(bufferReader) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L283 readEmptyVector(bufferReader) /* vSpendsSapling */; readEmptyVector(bufferReader) /* vOutputsSapling */; } function writeEmptySamplingBundle(bufferWriter) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L283 bufferWriter.writeVarInt(0) /* vSpendsSapling */; bufferWriter.writeVarInt(0) /* vOutputsSapling */; } function fromBufferV4(bufferReader, tx, amountType = 'number') { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L855-L857 tx.ins = readInputs(bufferReader); tx.outs = readOutputs(bufferReader, amountType); tx.locktime = bufferReader.readUInt32(); if (tx.isOverwinterCompatible()) { tx.expiryHeight = bufferReader.readUInt32(); } if (tx.isSaplingCompatible()) { const valueBalance = bufferReader.readSlice(8); if (!valueBalance.equals(exports.VALUE_INT64_ZERO)) { /* istanbul ignore next */ throw new ZcashTransaction_1.UnsupportedTransactionError(`valueBalance must be zero`); } // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L863 readEmptySaplingBundle(bufferReader); } if (tx.supportsJoinSplits()) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L869 readEmptyVector(bufferReader) /* vJoinSplit */; } } function fromBufferV5(bufferReader, tx, amountType = 'number') { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L815 tx.consensusBranchId = bufferReader.readUInt32(); tx.locktime = bufferReader.readUInt32(); tx.expiryHeight = bufferReader.readUInt32(); // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L828 tx.ins = readInputs(bufferReader); tx.outs = readOutputs(bufferReader, amountType); // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L835 readEmptySaplingBundle(bufferReader); readEmptyOrchardBundle(bufferReader); } function writeInputs(bufferWriter, ins) { bufferWriter.writeVarInt(ins.length); ins.forEach(function (txIn) { bufferWriter.writeSlice(txIn.hash); bufferWriter.writeUInt32(txIn.index); bufferWriter.writeVarSlice(txIn.script); bufferWriter.writeUInt32(txIn.sequence); }); } function writeOutputs(bufferWriter, outs) { bufferWriter.writeVarInt(outs.length); outs.forEach(function (txOut) { if (txOut.valueBuffer) { bufferWriter.writeSlice(txOut.valueBuffer); } else { bufferWriter.writeUInt64(txOut.value); } bufferWriter.writeVarSlice(txOut.script); }); } function toBufferV4(bufferWriter, tx) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L1083 writeInputs(bufferWriter, tx.ins); writeOutputs(bufferWriter, tx.outs); bufferWriter.writeUInt32(tx.locktime); if (tx.isOverwinterCompatible()) { bufferWriter.writeUInt32(tx.expiryHeight); } if (tx.isSaplingCompatible()) { bufferWriter.writeSlice(exports.VALUE_INT64_ZERO); bufferWriter.writeVarInt(0); // vShieldedSpendLength bufferWriter.writeVarInt(0); // vShieldedOutputLength } if (tx.supportsJoinSplits()) { bufferWriter.writeVarInt(0); // joinsSplits length } } function toBufferV5(bufferWriter, tx) { // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L825-L826 bufferWriter.writeUInt32(tx.consensusBranchId); bufferWriter.writeUInt32(tx.locktime); bufferWriter.writeUInt32(tx.expiryHeight); writeInputs(bufferWriter, tx.ins); writeOutputs(bufferWriter, tx.outs); // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L1063 writeEmptySamplingBundle(bufferWriter); // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L1081 writeEmptyOrchardBundle(bufferWriter); } //# 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* Transaction (de)serialization helpers.\n * Only supports full transparent transactions without shielded inputs or outputs.\n *\n * References:\n * - https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L771\n */\nimport { TxInput, TxOutput } from 'bitcoinjs-lib';\nimport { BufferReader, BufferWriter } from 'bitcoinjs-lib/src/bufferutils';\n\nimport { UnsupportedTransactionError, ZcashTransaction } from './ZcashTransaction';\n\nexport const VALUE_INT64_ZERO = Buffer.from('0000000000000000', 'hex');\n\nexport function readInputs(bufferReader: BufferReader): TxInput[] {\n  const vinLen = bufferReader.readVarInt();\n  const ins: TxInput[] = [];\n  for (let i = 0; i < vinLen; ++i) {\n    ins.push({\n      hash: bufferReader.readSlice(32),\n      index: bufferReader.readUInt32(),\n      script: bufferReader.readVarSlice(),\n      sequence: bufferReader.readUInt32(),\n      witness: [],\n    });\n  }\n  return ins;\n}\n\nexport function readOutputs<TNumber extends number | bigint>(\n  bufferReader: BufferReader,\n  amountType: 'number' | 'bigint' = 'number'\n): TxOutput<TNumber>[] {\n  const voutLen = bufferReader.readVarInt();\n  const outs: TxOutput<TNumber>[] = [];\n  for (let i = 0; i < voutLen; ++i) {\n    outs.push({\n      value: (amountType === 'bigint' ? bufferReader.readUInt64BigInt() : bufferReader.readUInt64()) as TNumber,\n      script: bufferReader.readVarSlice(),\n    });\n  }\n  return outs;\n}\n\nexport function readEmptyVector(bufferReader: BufferReader): void {\n  const n = bufferReader.readVarInt();\n  if (n !== 0) {\n    throw new UnsupportedTransactionError(`expected empty vector`);\n  }\n}\n\nexport function readEmptyOrchardBundle(bufferReader: BufferReader): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/orchard.h#L66\n  // https://github.com/zcash/librustzcash/blob/edcde252de221d4851f1e5145306c2caf95453bc/zcash_primitives/src/transaction/components/orchard.rs#L36\n  const v = bufferReader.readUInt8();\n  if (v !== 0x00) {\n    throw new UnsupportedTransactionError(`expected byte 0x00`);\n  }\n}\n\nexport function writeEmptyOrchardBundle(bufferWriter: BufferWriter): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/orchard.h#L66\n  // https://github.com/zcash/librustzcash/blob/edcde252de221d4851f1e5145306c2caf95453bc/zcash_primitives/src/transaction/components/orchard.rs#L201\n  bufferWriter.writeUInt8(0);\n}\n\nexport function readEmptySaplingBundle(bufferReader: BufferReader): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L283\n  readEmptyVector(bufferReader) /* vSpendsSapling */;\n  readEmptyVector(bufferReader) /* vOutputsSapling */;\n}\n\nexport function writeEmptySamplingBundle(bufferWriter: BufferWriter): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L283\n  bufferWriter.writeVarInt(0) /* vSpendsSapling */;\n  bufferWriter.writeVarInt(0) /* vOutputsSapling */;\n}\n\nexport function fromBufferV4<TNumber extends number | bigint>(\n  bufferReader: BufferReader,\n  tx: ZcashTransaction<TNumber>,\n  amountType: 'number' | 'bigint' = 'number'\n): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L855-L857\n  tx.ins = readInputs(bufferReader);\n  tx.outs = readOutputs<TNumber>(bufferReader, amountType);\n  tx.locktime = bufferReader.readUInt32();\n\n  if (tx.isOverwinterCompatible()) {\n    tx.expiryHeight = bufferReader.readUInt32();\n  }\n\n  if (tx.isSaplingCompatible()) {\n    const valueBalance = bufferReader.readSlice(8);\n    if (!valueBalance.equals(VALUE_INT64_ZERO)) {\n      /* istanbul ignore next */\n      throw new UnsupportedTransactionError(`valueBalance must be zero`);\n    }\n\n    // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L863\n    readEmptySaplingBundle(bufferReader);\n  }\n\n  if (tx.supportsJoinSplits()) {\n    // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L869\n    readEmptyVector(bufferReader) /* vJoinSplit */;\n  }\n}\n\nexport function fromBufferV5<TNumber extends number | bigint>(\n  bufferReader: BufferReader,\n  tx: ZcashTransaction<TNumber>,\n  amountType: 'number' | 'bigint' = 'number'\n): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L815\n  tx.consensusBranchId = bufferReader.readUInt32();\n  tx.locktime = bufferReader.readUInt32();\n  tx.expiryHeight = bufferReader.readUInt32();\n\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L828\n  tx.ins = readInputs(bufferReader);\n  tx.outs = readOutputs<TNumber>(bufferReader, amountType);\n\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L835\n  readEmptySaplingBundle(bufferReader);\n  readEmptyOrchardBundle(bufferReader);\n}\n\nexport function writeInputs(bufferWriter: BufferWriter, ins: TxInput[]): void {\n  bufferWriter.writeVarInt(ins.length);\n  ins.forEach(function (txIn) {\n    bufferWriter.writeSlice(txIn.hash);\n    bufferWriter.writeUInt32(txIn.index);\n    bufferWriter.writeVarSlice(txIn.script);\n    bufferWriter.writeUInt32(txIn.sequence);\n  });\n}\n\nexport function writeOutputs<TNumber extends number | bigint>(\n  bufferWriter: BufferWriter,\n  outs: TxOutput<TNumber>[]\n): void {\n  bufferWriter.writeVarInt(outs.length);\n  outs.forEach(function (txOut) {\n    if ((txOut as any).valueBuffer) {\n      bufferWriter.writeSlice((txOut as any).valueBuffer);\n    } else {\n      bufferWriter.writeUInt64(txOut.value);\n    }\n\n    bufferWriter.writeVarSlice(txOut.script);\n  });\n}\n\nexport function toBufferV4<TNumber extends number | bigint>(\n  bufferWriter: BufferWriter,\n  tx: ZcashTransaction<TNumber>\n): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L1083\n  writeInputs(bufferWriter, tx.ins);\n  writeOutputs<TNumber>(bufferWriter, tx.outs);\n\n  bufferWriter.writeUInt32(tx.locktime);\n\n  if (tx.isOverwinterCompatible()) {\n    bufferWriter.writeUInt32(tx.expiryHeight);\n  }\n\n  if (tx.isSaplingCompatible()) {\n    bufferWriter.writeSlice(VALUE_INT64_ZERO);\n    bufferWriter.writeVarInt(0); // vShieldedSpendLength\n    bufferWriter.writeVarInt(0); // vShieldedOutputLength\n  }\n\n  if (tx.supportsJoinSplits()) {\n    bufferWriter.writeVarInt(0); // joinsSplits length\n  }\n}\n\nexport function toBufferV5<TNumber extends number | bigint>(\n  bufferWriter: BufferWriter,\n  tx: ZcashTransaction<TNumber>\n): void {\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L825-L826\n  bufferWriter.writeUInt32(tx.consensusBranchId);\n  bufferWriter.writeUInt32(tx.locktime);\n  bufferWriter.writeUInt32(tx.expiryHeight);\n  writeInputs(bufferWriter, tx.ins);\n  writeOutputs<TNumber>(bufferWriter, tx.outs);\n\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L1063\n  writeEmptySamplingBundle(bufferWriter);\n  // https://github.com/zcash/zcash/blob/v4.5.1/src/primitives/transaction.h#L1081\n  writeEmptyOrchardBundle(bufferWriter);\n}\n"]}