Merge pull request #1086 from bitcoinjs/refactorTransaction
Move Transaction to ES6 class syntax
This commit is contained in:
Jonathan Underwood
GitHub
commit
5e1ae82a5d
1 changed files with 423 additions and 360 deletions
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@ -16,26 +16,11 @@ function varSliceSize (someScript) {
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function vectorSize (someVector) {
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const length = someVector.length
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return varuint.encodingLength(length) + someVector.reduce(function (sum, witness) {
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return varuint.encodingLength(length) + someVector.reduce((sum, witness) => {
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return sum + varSliceSize(witness)
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}, 0)
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}
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function Transaction () {
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this.version = 1
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this.locktime = 0
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this.ins = []
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this.outs = []
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}
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Transaction.DEFAULT_SEQUENCE = 0xffffffff
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Transaction.SIGHASH_ALL = 0x01
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Transaction.SIGHASH_NONE = 0x02
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Transaction.SIGHASH_SINGLE = 0x03
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Transaction.SIGHASH_ANYONECANPAY = 0x80
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Transaction.ADVANCED_TRANSACTION_MARKER = 0x00
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Transaction.ADVANCED_TRANSACTION_FLAG = 0x01
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const EMPTY_SCRIPT = Buffer.allocUnsafe(0)
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const EMPTY_WITNESS = []
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const ZERO = Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex')
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@ -46,8 +31,426 @@ const BLANK_OUTPUT = {
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valueBuffer: VALUE_UINT64_MAX
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}
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Transaction.fromBuffer = function (buffer, __noStrict) {
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class Transaction {
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constructor () {
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this.version = 1
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this.locktime = 0
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this.ins = []
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this.outs = []
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}
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static get DEFAULT_SEQUENCE () {
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return 0xffffffff
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}
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static get SIGHASH_ALL () {
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return 0x01
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}
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static get SIGHASH_NONE () {
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return 0x02
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}
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static get SIGHASH_SINGLE () {
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return 0x03
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}
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static get SIGHASH_ANYONECANPAY () {
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return 0x80
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}
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static get ADVANCED_TRANSACTION_MARKER () {
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return 0x00
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}
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static get ADVANCED_TRANSACTION_FLAG () {
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return 0x01
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}
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isCoinbase () {
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return this.ins.length === 1 && Transaction.isCoinbaseHash(this.ins[0].hash)
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}
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addInput (hash, index, sequence, scriptSig) {
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typeforce(types.tuple(
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types.Hash256bit,
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types.UInt32,
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types.maybe(types.UInt32),
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types.maybe(types.Buffer)
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), arguments)
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if (types.Null(sequence)) {
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sequence = Transaction.DEFAULT_SEQUENCE
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}
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// Add the input and return the input's index
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return (this.ins.push({
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hash: hash,
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index: index,
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script: scriptSig || EMPTY_SCRIPT,
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sequence: sequence,
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witness: EMPTY_WITNESS
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}) - 1)
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}
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addOutput (scriptPubKey, value) {
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typeforce(types.tuple(types.Buffer, types.Satoshi), arguments)
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// Add the output and return the output's index
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return (this.outs.push({
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script: scriptPubKey,
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value: value
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}) - 1)
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}
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hasWitnesses () {
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return this.ins.some((x) => {
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return x.witness.length !== 0
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})
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}
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weight () {
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const base = this.__byteLength(false)
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const total = this.__byteLength(true)
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return base * 3 + total
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}
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virtualSize () {
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return Math.ceil(this.weight() / 4)
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}
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byteLength () {
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return this.__byteLength(true)
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}
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__byteLength (__allowWitness) {
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const hasWitnesses = __allowWitness && this.hasWitnesses()
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return (
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(hasWitnesses ? 10 : 8) +
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varuint.encodingLength(this.ins.length) +
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varuint.encodingLength(this.outs.length) +
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this.ins.reduce((sum, input) => {
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return sum + 40 + varSliceSize(input.script)
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}, 0) +
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this.outs.reduce((sum, output) => {
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return sum + 8 + varSliceSize(output.script)
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}, 0) +
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(hasWitnesses ? this.ins.reduce((sum, input) => {
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return sum + vectorSize(input.witness)
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}, 0) : 0)
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)
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}
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clone () {
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const newTx = new Transaction()
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newTx.version = this.version
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newTx.locktime = this.locktime
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newTx.ins = this.ins.map((txIn) => {
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return {
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hash: txIn.hash,
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index: txIn.index,
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script: txIn.script,
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sequence: txIn.sequence,
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witness: txIn.witness
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}
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})
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newTx.outs = this.outs.map((txOut) => {
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return {
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script: txOut.script,
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value: txOut.value
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}
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})
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return newTx
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}
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/**
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* Hash transaction for signing a specific input.
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*
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* Bitcoin uses a different hash for each signed transaction input.
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* This method copies the transaction, makes the necessary changes based on the
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* hashType, and then hashes the result.
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* This hash can then be used to sign the provided transaction input.
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*/
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hashForSignature (inIndex, prevOutScript, hashType) {
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typeforce(types.tuple(types.UInt32, types.Buffer, /* types.UInt8 */ types.Number), arguments)
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// https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L29
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if (inIndex >= this.ins.length) return ONE
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// ignore OP_CODESEPARATOR
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const ourScript = bscript.compile(bscript.decompile(prevOutScript).filter((x) => {
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return x !== opcodes.OP_CODESEPARATOR
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}))
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const txTmp = this.clone()
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// SIGHASH_NONE: ignore all outputs? (wildcard payee)
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if ((hashType & 0x1f) === Transaction.SIGHASH_NONE) {
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txTmp.outs = []
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// ignore sequence numbers (except at inIndex)
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txTmp.ins.forEach((input, i) => {
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if (i === inIndex) return
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input.sequence = 0
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})
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// SIGHASH_SINGLE: ignore all outputs, except at the same index?
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} else if ((hashType & 0x1f) === Transaction.SIGHASH_SINGLE) {
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// https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L60
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if (inIndex >= this.outs.length) return ONE
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// truncate outputs after
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txTmp.outs.length = inIndex + 1
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// "blank" outputs before
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for (var i = 0; i < inIndex; i++) {
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txTmp.outs[i] = BLANK_OUTPUT
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}
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// ignore sequence numbers (except at inIndex)
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txTmp.ins.forEach((input, y) => {
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if (y === inIndex) return
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input.sequence = 0
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})
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}
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// SIGHASH_ANYONECANPAY: ignore inputs entirely?
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if (hashType & Transaction.SIGHASH_ANYONECANPAY) {
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txTmp.ins = [txTmp.ins[inIndex]]
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txTmp.ins[0].script = ourScript
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// SIGHASH_ALL: only ignore input scripts
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} else {
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// "blank" others input scripts
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txTmp.ins.forEach((input) => {
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input.script = EMPTY_SCRIPT
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})
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txTmp.ins[inIndex].script = ourScript
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}
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// serialize and hash
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const buffer = Buffer.allocUnsafe(txTmp.__byteLength(false) + 4)
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buffer.writeInt32LE(hashType, buffer.length - 4)
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txTmp.__toBuffer(buffer, 0, false)
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return bcrypto.hash256(buffer)
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}
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hashForWitnessV0 (inIndex, prevOutScript, value, hashType) {
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typeforce(types.tuple(types.UInt32, types.Buffer, types.Satoshi, types.UInt32), arguments)
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let tbuffer, toffset
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function writeSlice (slice) {
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toffset += slice.copy(tbuffer, toffset)
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}
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function writeUInt32 (i) {
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toffset = tbuffer.writeUInt32LE(i, toffset)
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}
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function writeUInt64 (i) {
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toffset = bufferutils.writeUInt64LE(tbuffer, i, toffset)
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}
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function writeVarInt (i) {
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varuint.encode(i, tbuffer, toffset)
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toffset += varuint.encode.bytes
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}
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function writeVarSlice (slice) {
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writeVarInt(slice.length)
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writeSlice(slice)
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}
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let hashOutputs = ZERO
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let hashPrevouts = ZERO
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let hashSequence = ZERO
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if (!(hashType & Transaction.SIGHASH_ANYONECANPAY)) {
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tbuffer = Buffer.allocUnsafe(36 * this.ins.length)
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toffset = 0
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this.ins.forEach((txIn) => {
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writeSlice(txIn.hash)
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writeUInt32(txIn.index)
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})
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hashPrevouts = bcrypto.hash256(tbuffer)
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}
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if (!(hashType & Transaction.SIGHASH_ANYONECANPAY) &&
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(hashType & 0x1f) !== Transaction.SIGHASH_SINGLE &&
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(hashType & 0x1f) !== Transaction.SIGHASH_NONE) {
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tbuffer = Buffer.allocUnsafe(4 * this.ins.length)
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toffset = 0
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this.ins.forEach((txIn) => {
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writeUInt32(txIn.sequence)
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})
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hashSequence = bcrypto.hash256(tbuffer)
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}
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if ((hashType & 0x1f) !== Transaction.SIGHASH_SINGLE &&
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(hashType & 0x1f) !== Transaction.SIGHASH_NONE) {
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const txOutsSize = this.outs.reduce((sum, output) => {
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return sum + 8 + varSliceSize(output.script)
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}, 0)
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tbuffer = Buffer.allocUnsafe(txOutsSize)
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toffset = 0
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this.outs.forEach((out) => {
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writeUInt64(out.value)
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writeVarSlice(out.script)
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})
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hashOutputs = bcrypto.hash256(tbuffer)
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} else if ((hashType & 0x1f) === Transaction.SIGHASH_SINGLE && inIndex < this.outs.length) {
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const output = this.outs[inIndex]
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tbuffer = Buffer.allocUnsafe(8 + varSliceSize(output.script))
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toffset = 0
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writeUInt64(output.value)
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writeVarSlice(output.script)
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hashOutputs = bcrypto.hash256(tbuffer)
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}
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tbuffer = Buffer.allocUnsafe(156 + varSliceSize(prevOutScript))
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toffset = 0
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const input = this.ins[inIndex]
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writeUInt32(this.version)
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writeSlice(hashPrevouts)
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writeSlice(hashSequence)
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writeSlice(input.hash)
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writeUInt32(input.index)
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writeVarSlice(prevOutScript)
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writeUInt64(value)
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writeUInt32(input.sequence)
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writeSlice(hashOutputs)
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writeUInt32(this.locktime)
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writeUInt32(hashType)
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return bcrypto.hash256(tbuffer)
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}
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getHash () {
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return bcrypto.hash256(this.__toBuffer(undefined, undefined, false))
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}
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getId () {
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// transaction hash's are displayed in reverse order
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return this.getHash().reverse().toString('hex')
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}
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toBuffer (buffer, initialOffset) {
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return this.__toBuffer(buffer, initialOffset, true)
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}
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__toBuffer (buffer, initialOffset, __allowWitness) {
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if (!buffer) buffer = Buffer.allocUnsafe(this.__byteLength(__allowWitness))
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let offset = initialOffset || 0
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function writeSlice (slice) {
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offset += slice.copy(buffer, offset)
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}
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function writeUInt8 (i) {
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offset = buffer.writeUInt8(i, offset)
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}
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function writeUInt32 (i) {
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offset = buffer.writeUInt32LE(i, offset)
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}
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function writeInt32 (i) {
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offset = buffer.writeInt32LE(i, offset)
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}
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function writeUInt64 (i) {
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offset = bufferutils.writeUInt64LE(buffer, i, offset)
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}
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function writeVarInt (i) {
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varuint.encode(i, buffer, offset)
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offset += varuint.encode.bytes
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}
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function writeVarSlice (slice) {
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writeVarInt(slice.length)
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writeSlice(slice)
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}
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function writeVector (vector) {
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writeVarInt(vector.length)
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vector.forEach(writeVarSlice)
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}
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writeInt32(this.version)
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const hasWitnesses = __allowWitness && this.hasWitnesses()
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if (hasWitnesses) {
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writeUInt8(Transaction.ADVANCED_TRANSACTION_MARKER)
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writeUInt8(Transaction.ADVANCED_TRANSACTION_FLAG)
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}
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writeVarInt(this.ins.length)
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this.ins.forEach((txIn) => {
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writeSlice(txIn.hash)
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writeUInt32(txIn.index)
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writeVarSlice(txIn.script)
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writeUInt32(txIn.sequence)
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})
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writeVarInt(this.outs.length)
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this.outs.forEach((txOut) => {
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if (!txOut.valueBuffer) {
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writeUInt64(txOut.value)
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} else {
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writeSlice(txOut.valueBuffer)
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}
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writeVarSlice(txOut.script)
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})
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if (hasWitnesses) {
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this.ins.forEach((input) => {
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writeVector(input.witness)
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})
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}
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writeUInt32(this.locktime)
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// avoid slicing unless necessary
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if (initialOffset !== undefined) return buffer.slice(initialOffset, offset)
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return buffer
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}
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toHex () {
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return this.toBuffer().toString('hex')
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}
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setInputScript (index, scriptSig) {
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typeforce(types.tuple(types.Number, types.Buffer), arguments)
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this.ins[index].script = scriptSig
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}
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setWitness (index, witness) {
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typeforce(types.tuple(types.Number, [types.Buffer]), arguments)
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this.ins[index].witness = witness
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}
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}
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Transaction.fromBuffer = (buffer, __noStrict) => {
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let offset = 0
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function readSlice (n) {
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offset += n
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return buffer.slice(offset - n, offset)
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@ -96,7 +499,7 @@ Transaction.fromBuffer = function (buffer, __noStrict) {
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let hasWitnesses = false
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if (marker === Transaction.ADVANCED_TRANSACTION_MARKER &&
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flag === Transaction.ADVANCED_TRANSACTION_FLAG) {
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flag === Transaction.ADVANCED_TRANSACTION_FLAG) {
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offset += 2
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hasWitnesses = true
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}
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@ -137,11 +540,11 @@ Transaction.fromBuffer = function (buffer, __noStrict) {
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return tx
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}
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Transaction.fromHex = function (hex) {
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Transaction.fromHex = (hex) => {
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return Transaction.fromBuffer(Buffer.from(hex, 'hex'))
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}
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Transaction.isCoinbaseHash = function (buffer) {
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Transaction.isCoinbaseHash = (buffer) => {
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typeforce(types.Hash256bit, buffer)
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for (var i = 0; i < 32; ++i) {
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if (buffer[i] !== 0) return false
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@ -149,344 +552,4 @@ Transaction.isCoinbaseHash = function (buffer) {
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return true
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}
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Transaction.prototype.isCoinbase = function () {
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return this.ins.length === 1 && Transaction.isCoinbaseHash(this.ins[0].hash)
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}
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Transaction.prototype.addInput = function (hash, index, sequence, scriptSig) {
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typeforce(types.tuple(
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types.Hash256bit,
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types.UInt32,
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types.maybe(types.UInt32),
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types.maybe(types.Buffer)
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), arguments)
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if (types.Null(sequence)) {
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sequence = Transaction.DEFAULT_SEQUENCE
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}
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// Add the input and return the input's index
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return (this.ins.push({
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hash: hash,
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index: index,
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script: scriptSig || EMPTY_SCRIPT,
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sequence: sequence,
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witness: EMPTY_WITNESS
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}) - 1)
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}
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Transaction.prototype.addOutput = function (scriptPubKey, value) {
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typeforce(types.tuple(types.Buffer, types.Satoshi), arguments)
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// Add the output and return the output's index
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return (this.outs.push({
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script: scriptPubKey,
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value: value
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}) - 1)
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}
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Transaction.prototype.hasWitnesses = function () {
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return this.ins.some(function (x) {
|
||||
return x.witness.length !== 0
|
||||
})
|
||||
}
|
||||
|
||||
Transaction.prototype.weight = function () {
|
||||
const base = this.__byteLength(false)
|
||||
const total = this.__byteLength(true)
|
||||
return base * 3 + total
|
||||
}
|
||||
|
||||
Transaction.prototype.virtualSize = function () {
|
||||
return Math.ceil(this.weight() / 4)
|
||||
}
|
||||
|
||||
Transaction.prototype.byteLength = function () {
|
||||
return this.__byteLength(true)
|
||||
}
|
||||
|
||||
Transaction.prototype.__byteLength = function (__allowWitness) {
|
||||
const hasWitnesses = __allowWitness && this.hasWitnesses()
|
||||
|
||||
return (
|
||||
(hasWitnesses ? 10 : 8) +
|
||||
varuint.encodingLength(this.ins.length) +
|
||||
varuint.encodingLength(this.outs.length) +
|
||||
this.ins.reduce(function (sum, input) { return sum + 40 + varSliceSize(input.script) }, 0) +
|
||||
this.outs.reduce(function (sum, output) { return sum + 8 + varSliceSize(output.script) }, 0) +
|
||||
(hasWitnesses ? this.ins.reduce(function (sum, input) { return sum + vectorSize(input.witness) }, 0) : 0)
|
||||
)
|
||||
}
|
||||
|
||||
Transaction.prototype.clone = function () {
|
||||
const newTx = new Transaction()
|
||||
newTx.version = this.version
|
||||
newTx.locktime = this.locktime
|
||||
|
||||
newTx.ins = this.ins.map(function (txIn) {
|
||||
return {
|
||||
hash: txIn.hash,
|
||||
index: txIn.index,
|
||||
script: txIn.script,
|
||||
sequence: txIn.sequence,
|
||||
witness: txIn.witness
|
||||
}
|
||||
})
|
||||
|
||||
newTx.outs = this.outs.map(function (txOut) {
|
||||
return {
|
||||
script: txOut.script,
|
||||
value: txOut.value
|
||||
}
|
||||
})
|
||||
|
||||
return newTx
|
||||
}
|
||||
|
||||
/**
|
||||
* Hash transaction for signing a specific input.
|
||||
*
|
||||
* Bitcoin uses a different hash for each signed transaction input.
|
||||
* This method copies the transaction, makes the necessary changes based on the
|
||||
* hashType, and then hashes the result.
|
||||
* This hash can then be used to sign the provided transaction input.
|
||||
*/
|
||||
Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashType) {
|
||||
typeforce(types.tuple(types.UInt32, types.Buffer, /* types.UInt8 */ types.Number), arguments)
|
||||
|
||||
// https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L29
|
||||
if (inIndex >= this.ins.length) return ONE
|
||||
|
||||
// ignore OP_CODESEPARATOR
|
||||
const ourScript = bscript.compile(bscript.decompile(prevOutScript).filter(function (x) {
|
||||
return x !== opcodes.OP_CODESEPARATOR
|
||||
}))
|
||||
|
||||
const txTmp = this.clone()
|
||||
|
||||
// SIGHASH_NONE: ignore all outputs? (wildcard payee)
|
||||
if ((hashType & 0x1f) === Transaction.SIGHASH_NONE) {
|
||||
txTmp.outs = []
|
||||
|
||||
// ignore sequence numbers (except at inIndex)
|
||||
txTmp.ins.forEach(function (input, i) {
|
||||
if (i === inIndex) return
|
||||
|
||||
input.sequence = 0
|
||||
})
|
||||
|
||||
// SIGHASH_SINGLE: ignore all outputs, except at the same index?
|
||||
} else if ((hashType & 0x1f) === Transaction.SIGHASH_SINGLE) {
|
||||
// https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L60
|
||||
if (inIndex >= this.outs.length) return ONE
|
||||
|
||||
// truncate outputs after
|
||||
txTmp.outs.length = inIndex + 1
|
||||
|
||||
// "blank" outputs before
|
||||
for (var i = 0; i < inIndex; i++) {
|
||||
txTmp.outs[i] = BLANK_OUTPUT
|
||||
}
|
||||
|
||||
// ignore sequence numbers (except at inIndex)
|
||||
txTmp.ins.forEach(function (input, y) {
|
||||
if (y === inIndex) return
|
||||
|
||||
input.sequence = 0
|
||||
})
|
||||
}
|
||||
|
||||
// SIGHASH_ANYONECANPAY: ignore inputs entirely?
|
||||
if (hashType & Transaction.SIGHASH_ANYONECANPAY) {
|
||||
txTmp.ins = [txTmp.ins[inIndex]]
|
||||
txTmp.ins[0].script = ourScript
|
||||
|
||||
// SIGHASH_ALL: only ignore input scripts
|
||||
} else {
|
||||
// "blank" others input scripts
|
||||
txTmp.ins.forEach(function (input) { input.script = EMPTY_SCRIPT })
|
||||
txTmp.ins[inIndex].script = ourScript
|
||||
}
|
||||
|
||||
// serialize and hash
|
||||
const buffer = Buffer.allocUnsafe(txTmp.__byteLength(false) + 4)
|
||||
buffer.writeInt32LE(hashType, buffer.length - 4)
|
||||
txTmp.__toBuffer(buffer, 0, false)
|
||||
|
||||
return bcrypto.hash256(buffer)
|
||||
}
|
||||
|
||||
Transaction.prototype.hashForWitnessV0 = function (inIndex, prevOutScript, value, hashType) {
|
||||
typeforce(types.tuple(types.UInt32, types.Buffer, types.Satoshi, types.UInt32), arguments)
|
||||
|
||||
let tbuffer, toffset
|
||||
function writeSlice (slice) { toffset += slice.copy(tbuffer, toffset) }
|
||||
function writeUInt32 (i) { toffset = tbuffer.writeUInt32LE(i, toffset) }
|
||||
function writeUInt64 (i) { toffset = bufferutils.writeUInt64LE(tbuffer, i, toffset) }
|
||||
function writeVarInt (i) {
|
||||
varuint.encode(i, tbuffer, toffset)
|
||||
toffset += varuint.encode.bytes
|
||||
}
|
||||
function writeVarSlice (slice) { writeVarInt(slice.length); writeSlice(slice) }
|
||||
|
||||
let hashOutputs = ZERO
|
||||
let hashPrevouts = ZERO
|
||||
let hashSequence = ZERO
|
||||
|
||||
if (!(hashType & Transaction.SIGHASH_ANYONECANPAY)) {
|
||||
tbuffer = Buffer.allocUnsafe(36 * this.ins.length)
|
||||
toffset = 0
|
||||
|
||||
this.ins.forEach(function (txIn) {
|
||||
writeSlice(txIn.hash)
|
||||
writeUInt32(txIn.index)
|
||||
})
|
||||
|
||||
hashPrevouts = bcrypto.hash256(tbuffer)
|
||||
}
|
||||
|
||||
if (!(hashType & Transaction.SIGHASH_ANYONECANPAY) &&
|
||||
(hashType & 0x1f) !== Transaction.SIGHASH_SINGLE &&
|
||||
(hashType & 0x1f) !== Transaction.SIGHASH_NONE) {
|
||||
tbuffer = Buffer.allocUnsafe(4 * this.ins.length)
|
||||
toffset = 0
|
||||
|
||||
this.ins.forEach(function (txIn) {
|
||||
writeUInt32(txIn.sequence)
|
||||
})
|
||||
|
||||
hashSequence = bcrypto.hash256(tbuffer)
|
||||
}
|
||||
|
||||
if ((hashType & 0x1f) !== Transaction.SIGHASH_SINGLE &&
|
||||
(hashType & 0x1f) !== Transaction.SIGHASH_NONE) {
|
||||
const txOutsSize = this.outs.reduce(function (sum, output) {
|
||||
return sum + 8 + varSliceSize(output.script)
|
||||
}, 0)
|
||||
|
||||
tbuffer = Buffer.allocUnsafe(txOutsSize)
|
||||
toffset = 0
|
||||
|
||||
this.outs.forEach(function (out) {
|
||||
writeUInt64(out.value)
|
||||
writeVarSlice(out.script)
|
||||
})
|
||||
|
||||
hashOutputs = bcrypto.hash256(tbuffer)
|
||||
} else if ((hashType & 0x1f) === Transaction.SIGHASH_SINGLE && inIndex < this.outs.length) {
|
||||
const output = this.outs[inIndex]
|
||||
|
||||
tbuffer = Buffer.allocUnsafe(8 + varSliceSize(output.script))
|
||||
toffset = 0
|
||||
writeUInt64(output.value)
|
||||
writeVarSlice(output.script)
|
||||
|
||||
hashOutputs = bcrypto.hash256(tbuffer)
|
||||
}
|
||||
|
||||
tbuffer = Buffer.allocUnsafe(156 + varSliceSize(prevOutScript))
|
||||
toffset = 0
|
||||
|
||||
const input = this.ins[inIndex]
|
||||
writeUInt32(this.version)
|
||||
writeSlice(hashPrevouts)
|
||||
writeSlice(hashSequence)
|
||||
writeSlice(input.hash)
|
||||
writeUInt32(input.index)
|
||||
writeVarSlice(prevOutScript)
|
||||
writeUInt64(value)
|
||||
writeUInt32(input.sequence)
|
||||
writeSlice(hashOutputs)
|
||||
writeUInt32(this.locktime)
|
||||
writeUInt32(hashType)
|
||||
return bcrypto.hash256(tbuffer)
|
||||
}
|
||||
|
||||
Transaction.prototype.getHash = function () {
|
||||
return bcrypto.hash256(this.__toBuffer(undefined, undefined, false))
|
||||
}
|
||||
|
||||
Transaction.prototype.getId = function () {
|
||||
// transaction hash's are displayed in reverse order
|
||||
return this.getHash().reverse().toString('hex')
|
||||
}
|
||||
|
||||
Transaction.prototype.toBuffer = function (buffer, initialOffset) {
|
||||
return this.__toBuffer(buffer, initialOffset, true)
|
||||
}
|
||||
|
||||
Transaction.prototype.__toBuffer = function (buffer, initialOffset, __allowWitness) {
|
||||
if (!buffer) buffer = Buffer.allocUnsafe(this.__byteLength(__allowWitness))
|
||||
|
||||
let offset = initialOffset || 0
|
||||
function writeSlice (slice) { offset += slice.copy(buffer, offset) }
|
||||
function writeUInt8 (i) { offset = buffer.writeUInt8(i, offset) }
|
||||
function writeUInt32 (i) { offset = buffer.writeUInt32LE(i, offset) }
|
||||
function writeInt32 (i) { offset = buffer.writeInt32LE(i, offset) }
|
||||
function writeUInt64 (i) { offset = bufferutils.writeUInt64LE(buffer, i, offset) }
|
||||
function writeVarInt (i) {
|
||||
varuint.encode(i, buffer, offset)
|
||||
offset += varuint.encode.bytes
|
||||
}
|
||||
function writeVarSlice (slice) { writeVarInt(slice.length); writeSlice(slice) }
|
||||
function writeVector (vector) { writeVarInt(vector.length); vector.forEach(writeVarSlice) }
|
||||
|
||||
writeInt32(this.version)
|
||||
|
||||
const hasWitnesses = __allowWitness && this.hasWitnesses()
|
||||
|
||||
if (hasWitnesses) {
|
||||
writeUInt8(Transaction.ADVANCED_TRANSACTION_MARKER)
|
||||
writeUInt8(Transaction.ADVANCED_TRANSACTION_FLAG)
|
||||
}
|
||||
|
||||
writeVarInt(this.ins.length)
|
||||
|
||||
this.ins.forEach(function (txIn) {
|
||||
writeSlice(txIn.hash)
|
||||
writeUInt32(txIn.index)
|
||||
writeVarSlice(txIn.script)
|
||||
writeUInt32(txIn.sequence)
|
||||
})
|
||||
|
||||
writeVarInt(this.outs.length)
|
||||
this.outs.forEach(function (txOut) {
|
||||
if (!txOut.valueBuffer) {
|
||||
writeUInt64(txOut.value)
|
||||
} else {
|
||||
writeSlice(txOut.valueBuffer)
|
||||
}
|
||||
|
||||
writeVarSlice(txOut.script)
|
||||
})
|
||||
|
||||
if (hasWitnesses) {
|
||||
this.ins.forEach(function (input) {
|
||||
writeVector(input.witness)
|
||||
})
|
||||
}
|
||||
|
||||
writeUInt32(this.locktime)
|
||||
|
||||
// avoid slicing unless necessary
|
||||
if (initialOffset !== undefined) return buffer.slice(initialOffset, offset)
|
||||
return buffer
|
||||
}
|
||||
|
||||
Transaction.prototype.toHex = function () {
|
||||
return this.toBuffer().toString('hex')
|
||||
}
|
||||
|
||||
Transaction.prototype.setInputScript = function (index, scriptSig) {
|
||||
typeforce(types.tuple(types.Number, types.Buffer), arguments)
|
||||
|
||||
this.ins[index].script = scriptSig
|
||||
}
|
||||
|
||||
Transaction.prototype.setWitness = function (index, witness) {
|
||||
typeforce(types.tuple(types.Number, [types.Buffer]), arguments)
|
||||
|
||||
this.ins[index].witness = witness
|
||||
}
|
||||
|
||||
module.exports = Transaction
|
||||
|
|
|
|||
Loading…
Reference in a new issue