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