@bitgo-beta/utxo-lib
Version:
Client-side Bitcoin JavaScript library
109 lines • 15.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.DashTransaction = void 0;
const bufferutils_1 = require("bitcoinjs-lib/src/bufferutils");
const bitcoinjs_lib_1 = require("bitcoinjs-lib");
const UtxoTransaction_1 = require("../UtxoTransaction");
const networks_1 = require("../../networks");
class DashTransaction extends UtxoTransaction_1.UtxoTransaction {
constructor(network, tx, amountType) {
super(network, tx, amountType);
this.type = 0;
if (!networks_1.isDash(network)) {
throw new Error(`invalid network`);
}
if (tx) {
this.version = tx.version;
if (tx instanceof DashTransaction) {
this.type = tx.type;
this.extraPayload = tx.extraPayload;
}
}
// since `__toBuffer` is private we have to do a little hack here
this.__toBuffer = this.toBufferWithExtraPayload;
}
static newTransaction(network, transaction, amountType) {
return new DashTransaction(network, transaction, amountType);
}
static fromBuffer(buffer, noStrict, amountType = 'number', network) {
const tx = super.fromBuffer(buffer, true, amountType, network);
tx.type = tx.version >> 16;
tx.version = tx.version & 0xffff;
if (tx.byteLength() !== buffer.length) {
const bufferReader = new bufferutils_1.BufferReader(buffer, tx.byteLength());
tx.extraPayload = bufferReader.readVarSlice();
}
return tx;
}
clone(amountType) {
return new DashTransaction(this.network, this, amountType);
}
byteLength(_ALLOW_WITNESS) {
return super.byteLength(_ALLOW_WITNESS) + (this.extraPayload ? UtxoTransaction_1.varSliceSize(this.extraPayload) : 0);
}
/**
* Helper to override `__toBuffer()` of bitcoinjs.Transaction.
* Since the method is private, we use a hack in the constructor to make it work.
*
* TODO: remove `private` modifier in bitcoinjs `__toBuffer()` or find some other solution
*
* @param buffer - optional target buffer
* @param initialOffset - can only be undefined or 0. Other values are only used for serialization in blocks.
* @param _ALLOW_WITNESS - ignored
*/
toBufferWithExtraPayload(buffer, initialOffset, _ALLOW_WITNESS = false) {
// We can ignore the `_ALLOW_WITNESS` parameter here since it has no effect.
if (!buffer) {
buffer = Buffer.allocUnsafe(this.byteLength(false));
}
if (initialOffset !== undefined && initialOffset !== 0) {
throw new Error(`not supported`);
}
// Start out with regular bitcoin byte sequence.
// This buffer will have excess size because it uses `byteLength()` to allocate.
const baseBuffer = bitcoinjs_lib_1.Transaction.prototype.__toBuffer.call(this);
baseBuffer.copy(buffer);
// overwrite leading version bytes (uint16 version, uint16 type)
const bufferWriter = new bufferutils_1.BufferWriter(buffer, 0);
bufferWriter.writeUInt32((this.version & 0xffff) | (this.type << 16));
// Seek to end of original byte sequence and add extraPayload.
// We must use the byteLength as calculated by the bitcoinjs implementation since
// `baseBuffer` has an excess size.
if (this.extraPayload) {
bufferWriter.offset = bitcoinjs_lib_1.Transaction.prototype.byteLength.call(this);
bufferWriter.writeVarSlice(this.extraPayload);
}
return buffer;
}
getHash(forWitness) {
if (forWitness) {
throw new Error(`invalid argument`);
}
return bitcoinjs_lib_1.crypto.hash256(this.toBuffer());
}
/**
* Build a hash for all or none of the transaction inputs depending on the hashtype
* @param hashType
* @returns Buffer
*/
getPrevoutHash(hashType) {
if (!(hashType & UtxoTransaction_1.UtxoTransaction.SIGHASH_ANYONECANPAY)) {
const bufferWriter = new bufferutils_1.BufferWriter(Buffer.allocUnsafe(36 * this.ins.length));
this.ins.forEach(function (txIn) {
bufferWriter.writeSlice(txIn.hash);
bufferWriter.writeUInt32(txIn.index);
});
return bitcoinjs_lib_1.crypto.hash256(bufferWriter.buffer);
}
return Buffer.alloc(32, 0);
}
}
exports.DashTransaction = DashTransaction;
DashTransaction.DASH_NORMAL = 0;
DashTransaction.DASH_PROVIDER_REGISTER = 1;
DashTransaction.DASH_PROVIDER_UPDATE_SERVICE = 2;
DashTransaction.DASH_PROVIDER_UPDATE_REGISTRAR = 3;
DashTransaction.DASH_PROVIDER_UPDATE_REVOKE = 4;
DashTransaction.DASH_COINBASE = 5;
DashTransaction.DASH_QUORUM_COMMITMENT = 6;
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{ BufferReader, BufferWriter } from 'bitcoinjs-lib/src/bufferutils';\nimport { crypto as bcrypto, Transaction } from 'bitcoinjs-lib';\n\nimport { UtxoTransaction, varSliceSize } from '../UtxoTransaction';\nimport { isDash, Network } from '../../networks';\n\nexport class DashTransaction<TNumber extends number | bigint = number> extends UtxoTransaction<TNumber> {\n  static DASH_NORMAL = 0;\n  static DASH_PROVIDER_REGISTER = 1;\n  static DASH_PROVIDER_UPDATE_SERVICE = 2;\n  static DASH_PROVIDER_UPDATE_REGISTRAR = 3;\n  static DASH_PROVIDER_UPDATE_REVOKE = 4;\n  static DASH_COINBASE = 5;\n  static DASH_QUORUM_COMMITMENT = 6;\n\n  public type = 0;\n  public extraPayload?: Buffer;\n\n  constructor(network: Network, tx?: Transaction<bigint | number>, amountType?: 'bigint' | 'number') {\n    super(network, tx, amountType);\n\n    if (!isDash(network)) {\n      throw new Error(`invalid network`);\n    }\n\n    if (tx) {\n      this.version = tx.version;\n\n      if (tx instanceof DashTransaction) {\n        this.type = tx.type;\n        this.extraPayload = tx.extraPayload;\n      }\n    }\n\n    // since `__toBuffer` is private we have to do a little hack here\n    (this as any).__toBuffer = this.toBufferWithExtraPayload;\n  }\n\n  protected static newTransaction<TNumber extends number | bigint = number>(\n    network: Network,\n    transaction?: DashTransaction<number | bigint>,\n    amountType?: 'number' | 'bigint'\n  ): DashTransaction<TNumber> {\n    return new DashTransaction<TNumber>(network, transaction, amountType);\n  }\n\n  static fromBuffer<TNumber extends number | bigint = number>(\n    buffer: Buffer,\n    noStrict: boolean,\n    amountType: 'number' | 'bigint' = 'number',\n    network: Network\n  ): DashTransaction<TNumber> {\n    const tx = super.fromBuffer<TNumber>(buffer, true, amountType, network) as DashTransaction<TNumber>;\n    tx.type = tx.version >> 16;\n    tx.version = tx.version & 0xffff;\n    if (tx.byteLength() !== buffer.length) {\n      const bufferReader = new BufferReader(buffer, tx.byteLength());\n      tx.extraPayload = bufferReader.readVarSlice();\n    }\n    return tx;\n  }\n\n  clone<TN2 extends bigint | number = TNumber>(amountType?: 'number' | 'bigint'): DashTransaction<TN2> {\n    return new DashTransaction<TN2>(this.network, this, amountType);\n  }\n\n  byteLength(_ALLOW_WITNESS?: boolean): number {\n    return super.byteLength(_ALLOW_WITNESS) + (this.extraPayload ? varSliceSize(this.extraPayload) : 0);\n  }\n\n  /**\n   * Helper to override `__toBuffer()` of bitcoinjs.Transaction.\n   * Since the method is private, we use a hack in the constructor to make it work.\n   *\n   * TODO: remove `private` modifier in bitcoinjs `__toBuffer()` or find some other solution\n   *\n   * @param buffer - optional target buffer\n   * @param initialOffset - can only be undefined or 0. Other values are only used for serialization in blocks.\n   * @param _ALLOW_WITNESS - ignored\n   */\n  private toBufferWithExtraPayload(buffer?: Buffer, initialOffset?: number, _ALLOW_WITNESS = false): Buffer {\n    // We can ignore the `_ALLOW_WITNESS` parameter here since it has no effect.\n    if (!buffer) {\n      buffer = Buffer.allocUnsafe(this.byteLength(false));\n    }\n\n    if (initialOffset !== undefined && initialOffset !== 0) {\n      throw new Error(`not supported`);\n    }\n\n    // Start out with regular bitcoin byte sequence.\n    // This buffer will have excess size because it uses `byteLength()` to allocate.\n    const baseBuffer = (Transaction.prototype as any).__toBuffer.call(this);\n    baseBuffer.copy(buffer);\n\n    // overwrite leading version bytes (uint16 version, uint16 type)\n    const bufferWriter = new BufferWriter(buffer, 0);\n    bufferWriter.writeUInt32((this.version & 0xffff) | (this.type << 16));\n\n    // Seek to end of original byte sequence and add extraPayload.\n    // We must use the byteLength as calculated by the bitcoinjs implementation since\n    // `baseBuffer` has an excess size.\n    if (this.extraPayload) {\n      bufferWriter.offset = Transaction.prototype.byteLength.call(this);\n      bufferWriter.writeVarSlice(this.extraPayload);\n    }\n\n    return buffer;\n  }\n\n  getHash(forWitness?: boolean): Buffer {\n    if (forWitness) {\n      throw new Error(`invalid argument`);\n    }\n    return bcrypto.hash256(this.toBuffer());\n  }\n\n  /**\n   * Build a hash for all or none of the transaction inputs depending on the hashtype\n   * @param hashType\n   * @returns Buffer\n   */\n  getPrevoutHash(hashType: number): Buffer {\n    if (!(hashType & UtxoTransaction.SIGHASH_ANYONECANPAY)) {\n      const bufferWriter = new BufferWriter(Buffer.allocUnsafe(36 * this.ins.length));\n\n      this.ins.forEach(function (txIn) {\n        bufferWriter.writeSlice(txIn.hash);\n        bufferWriter.writeUInt32(txIn.index);\n      });\n\n      return bcrypto.hash256(bufferWriter.buffer);\n    }\n\n    return Buffer.alloc(32, 0);\n  }\n}\n"]}