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TxBuilder: fix out-of-order multisignature signing

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This commit is contained in:
Daniel Cousens 2015-01-06 15:50:13 +11:00
parent 4c9fd6010e
commit 23a37fb771
2 changed files with 22 additions and 16 deletions

31
src/transaction_builder.js
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@ -49,13 +49,14 @@ function extractInput(txIn) {
break
case 'multisig':
parsed = scriptSig.chunks.slice(1).filter(function(chunk) {
return chunk !== ops.OP_0
}).map(ECSignature.parseScriptSignature)
signatures = scriptSig.chunks.slice(1).map(function(chunk) {
if (chunk === ops.OP_0) return chunk
hashType = parsed[0].hashType
signatures = parsed.map(function(p) { return p.signature })
initialized = true
var parsed = ECSignature.parseScriptSignature(chunk)
hashType = parsed.hashType
return parsed.signature
})
if (redeemScript) {
pubKeys = redeemScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
@ -124,10 +125,8 @@ TransactionBuilder.fromTransaction = function(transaction) {
// Extract/add signatures
txb.inputs = transaction.ins.map(function(txIn) {
// Coinbase inputs not supported
assert(!Array.prototype.every.call(txIn.hash, function(x) {
return x === 0
}), 'coinbase inputs not supported')
// TODO: remove me after testcase added
assert(!isCoinbase(txIn.hash), 'coinbase inputs not supported')
// Ignore empty scripts
if (txIn.script.buffer.length === 0) return
@ -236,9 +235,17 @@ TransactionBuilder.prototype.__build = function(allowIncomplete) {
case 'multisig':
assert(input.signatures, 'Transaction is missing signatures')
var signatures = input.signatures.map(function(signature) {
// Array.prototype.map is sparse-compatible
var msSignatures = input.signatures.map(function(signature) {
return signature.toScriptSignature(input.hashType)
}).filter(function(signature) { return !!signature })
})
// fill in blanks with OP_0
for (var i = 0; i < msSignatures.length; ++i) {
if (msSignatures[i]) continue
msSignatures[i] = ops.OP_0
}
var redeemScript = allowIncomplete ? undefined : input.redeemScript
scriptSig = scripts.multisigInput(signatures, redeemScript)