TxBuilder: re-order functions to project standard
This commit is contained in:
Daniel Cousens
parent
4f88980dfb
commit
22f8c8aa4a
1 changed files with 160 additions and 158 deletions
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@ -15,164 +15,7 @@ function TransactionBuilder() {
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this.tx = new Transaction()
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}
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TransactionBuilder.prototype.addInput = function(prevTx, index, sequence, prevOutScript) {
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var prevOutHash
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if (typeof prevTx === 'string') {
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prevOutHash = new Buffer(prevTx, 'hex')
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// TxId hex is big-endian, we want little-endian hash
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Array.prototype.reverse.call(prevOutHash)
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} else if (prevTx instanceof Transaction) {
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prevOutHash = prevTx.getHash()
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prevOutScript = prevTx.outs[index].script
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} else {
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prevOutHash = prevTx
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}
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var prevOutType
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if (prevOutScript !== undefined) {
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prevOutType = scripts.classifyOutput(prevOutScript)
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assert.notEqual(prevOutType, 'nonstandard', 'PrevOutScript not supported (nonstandard)')
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}
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assert(this.signatures.every(function(input) {
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return input.hashType & Transaction.SIGHASH_ANYONECANPAY
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}), 'No, this would invalidate signatures')
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var prevOut = prevOutHash.toString('hex') + ':' + index
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assert(!(prevOut in this.prevOutMap), 'Transaction is already an input')
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var vout = this.tx.addInput(prevOutHash, index, sequence)
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this.prevOutMap[prevOut] = true
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this.prevOutScripts[vout] = prevOutScript
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this.prevOutTypes[vout] = prevOutType
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return vout
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}
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TransactionBuilder.prototype.addOutput = function(scriptPubKey, value) {
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assert(this.signatures.every(function(signature) {
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return (signature.hashType & 0x1f) === Transaction.SIGHASH_SINGLE
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}), 'No, this would invalidate signatures')
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return this.tx.addOutput(scriptPubKey, value)
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}
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TransactionBuilder.prototype.sign = function(index, privKey, redeemScript, hashType) {
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assert(this.tx.ins.length >= index, 'No input at index: ' + index)
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hashType = hashType || Transaction.SIGHASH_ALL
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var prevOutScript = this.prevOutScripts[index]
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var prevOutType = this.prevOutTypes[index]
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var scriptType, hash
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if (redeemScript) {
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prevOutScript = prevOutScript || scripts.scriptHashOutput(redeemScript.getHash())
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prevOutType = prevOutType || 'scripthash'
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assert.equal(prevOutType, 'scripthash', 'PrevOutScript must be P2SH')
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scriptType = scripts.classifyOutput(redeemScript)
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assert.notEqual(scriptType, 'scripthash', 'RedeemScript can\'t be P2SH')
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assert.notEqual(scriptType, 'nonstandard', 'RedeemScript not supported (nonstandard)')
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hash = this.tx.hashForSignature(index, redeemScript, hashType)
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} else {
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prevOutScript = prevOutScript || privKey.pub.getAddress().toOutputScript()
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scriptType = prevOutType || 'pubkeyhash'
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assert.notEqual(scriptType, 'scripthash', 'PrevOutScript requires redeemScript')
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hash = this.tx.hashForSignature(index, prevOutScript, hashType)
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}
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if (!(index in this.signatures)) {
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this.signatures[index] = {
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hashType: hashType,
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pubKeys: [],
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redeemScript: redeemScript,
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scriptType: scriptType,
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signatures: []
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}
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}
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var input = this.signatures[index]
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assert.equal(input.hashType, hashType, 'Inconsistent hashType')
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assert.deepEqual(input.redeemScript, redeemScript, 'Inconsistent redeemScript')
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var signature = privKey.sign(hash)
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input.pubKeys.push(privKey.pub)
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input.signatures.push(signature)
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}
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TransactionBuilder.prototype.build = function() {
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return this.__build(false)
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}
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TransactionBuilder.prototype.buildIncomplete = function() {
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return this.__build(true)
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}
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TransactionBuilder.prototype.__build = function(allowIncomplete) {
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if (!allowIncomplete) {
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assert(this.tx.ins.length > 0, 'Transaction has no inputs')
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assert(this.tx.outs.length > 0, 'Transaction has no outputs')
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assert(this.signatures.length > 0, 'Transaction has no signatures')
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assert.equal(this.signatures.length, this.tx.ins.length, 'Transaction is missing signatures')
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}
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var tx = this.tx.clone()
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// Create script signatures from signature meta-data
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this.signatures.forEach(function(input, index) {
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var scriptSig
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var scriptType = input.scriptType
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var signatures = input.signatures.map(function(signature) {
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return signature.toScriptSignature(input.hashType)
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})
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switch (scriptType) {
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case 'pubkeyhash':
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var signature = signatures[0]
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var pubKey = input.pubKeys[0]
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scriptSig = scripts.pubKeyHashInput(signature, pubKey)
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break
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case 'multisig':
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var redeemScript = allowIncomplete ? undefined : input.redeemScript
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scriptSig = scripts.multisigInput(signatures, redeemScript)
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break
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case 'pubkey':
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var signature = signatures[0]
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scriptSig = scripts.pubKeyInput(signature)
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break
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default:
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assert(false, scriptType + ' not supported')
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}
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if (input.redeemScript) {
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scriptSig = scripts.scriptHashInput(scriptSig, input.redeemScript)
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}
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tx.setInputScript(index, scriptSig)
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})
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return tx
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}
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// Static constructors
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TransactionBuilder.fromTransaction = function(transaction) {
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var txb = new TransactionBuilder()
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@ -255,4 +98,163 @@ TransactionBuilder.fromTransaction = function(transaction) {
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return txb
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}
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// Operations
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TransactionBuilder.prototype.addInput = function(prevTx, index, sequence, prevOutScript) {
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var prevOutHash
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if (typeof prevTx === 'string') {
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prevOutHash = new Buffer(prevTx, 'hex')
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// TxId hex is big-endian, we want little-endian hash
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Array.prototype.reverse.call(prevOutHash)
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} else if (prevTx instanceof Transaction) {
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prevOutHash = prevTx.getHash()
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prevOutScript = prevTx.outs[index].script
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} else {
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prevOutHash = prevTx
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}
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var prevOutType
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if (prevOutScript !== undefined) {
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prevOutType = scripts.classifyOutput(prevOutScript)
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assert.notEqual(prevOutType, 'nonstandard', 'PrevOutScript not supported (nonstandard)')
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}
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assert(this.signatures.every(function(input) {
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return input.hashType & Transaction.SIGHASH_ANYONECANPAY
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}), 'No, this would invalidate signatures')
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var prevOut = prevOutHash.toString('hex') + ':' + index
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assert(!(prevOut in this.prevOutMap), 'Transaction is already an input')
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var vout = this.tx.addInput(prevOutHash, index, sequence)
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this.prevOutMap[prevOut] = true
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this.prevOutScripts[vout] = prevOutScript
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this.prevOutTypes[vout] = prevOutType
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return vout
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}
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TransactionBuilder.prototype.addOutput = function(scriptPubKey, value) {
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assert(this.signatures.every(function(signature) {
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return (signature.hashType & 0x1f) === Transaction.SIGHASH_SINGLE
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}), 'No, this would invalidate signatures')
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return this.tx.addOutput(scriptPubKey, value)
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}
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TransactionBuilder.prototype.build = function() {
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return this.__build(false)
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}
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TransactionBuilder.prototype.buildIncomplete = function() {
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return this.__build(true)
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}
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TransactionBuilder.prototype.__build = function(allowIncomplete) {
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if (!allowIncomplete) {
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assert(this.tx.ins.length > 0, 'Transaction has no inputs')
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assert(this.tx.outs.length > 0, 'Transaction has no outputs')
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assert(this.signatures.length > 0, 'Transaction has no signatures')
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assert.equal(this.signatures.length, this.tx.ins.length, 'Transaction is missing signatures')
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}
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var tx = this.tx.clone()
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// Create script signatures from signature meta-data
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this.signatures.forEach(function(input, index) {
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var scriptSig
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var scriptType = input.scriptType
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var signatures = input.signatures.map(function(signature) {
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return signature.toScriptSignature(input.hashType)
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})
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switch (scriptType) {
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case 'pubkeyhash':
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var signature = signatures[0]
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var pubKey = input.pubKeys[0]
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scriptSig = scripts.pubKeyHashInput(signature, pubKey)
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break
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case 'multisig':
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var redeemScript = allowIncomplete ? undefined : input.redeemScript
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scriptSig = scripts.multisigInput(signatures, redeemScript)
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break
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case 'pubkey':
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var signature = signatures[0]
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scriptSig = scripts.pubKeyInput(signature)
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break
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default:
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assert(false, scriptType + ' not supported')
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}
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if (input.redeemScript) {
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scriptSig = scripts.scriptHashInput(scriptSig, input.redeemScript)
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}
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tx.setInputScript(index, scriptSig)
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})
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return tx
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}
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TransactionBuilder.prototype.sign = function(index, privKey, redeemScript, hashType) {
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assert(this.tx.ins.length >= index, 'No input at index: ' + index)
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hashType = hashType || Transaction.SIGHASH_ALL
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var prevOutScript = this.prevOutScripts[index]
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var prevOutType = this.prevOutTypes[index]
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var scriptType, hash
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if (redeemScript) {
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prevOutScript = prevOutScript || scripts.scriptHashOutput(redeemScript.getHash())
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prevOutType = prevOutType || 'scripthash'
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assert.equal(prevOutType, 'scripthash', 'PrevOutScript must be P2SH')
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scriptType = scripts.classifyOutput(redeemScript)
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assert.notEqual(scriptType, 'scripthash', 'RedeemScript can\'t be P2SH')
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assert.notEqual(scriptType, 'nonstandard', 'RedeemScript not supported (nonstandard)')
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hash = this.tx.hashForSignature(index, redeemScript, hashType)
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} else {
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prevOutScript = prevOutScript || privKey.pub.getAddress().toOutputScript()
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scriptType = prevOutType || 'pubkeyhash'
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assert.notEqual(scriptType, 'scripthash', 'PrevOutScript requires redeemScript')
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hash = this.tx.hashForSignature(index, prevOutScript, hashType)
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}
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if (!(index in this.signatures)) {
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this.signatures[index] = {
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hashType: hashType,
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pubKeys: [],
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redeemScript: redeemScript,
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scriptType: scriptType,
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signatures: []
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}
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}
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var input = this.signatures[index]
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assert.equal(input.hashType, hashType, 'Inconsistent hashType')
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assert.deepEqual(input.redeemScript, redeemScript, 'Inconsistent redeemScript')
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var signature = privKey.sign(hash)
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input.pubKeys.push(privKey.pub)
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input.signatures.push(signature)
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}
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module.exports = TransactionBuilder
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