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Merge #8118: Reduce unnecessary hashing in signrawtransaction 

bd0f413 Reduce unnecessary hashing in signrawtransaction (Jonas Nick)
This commit is contained in:
Wladimir J. van der Laan 2016-06-07 14:34:23 +02:00
parent cfc6da0b1b bd0f413877
commit 9b6a48c2e9
No known key found for this signature in database
GPG Key ID: 74810B012346C9A6
1 changed files with 5 additions and 2 deletions
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7
src/rpc/rawtransaction.cpp
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@ -743,6 +743,9 @@ UniValue signrawtransaction(const UniValue& params, bool fHelp)
// Script verification errors
UniValue vErrors(UniValue::VARR);
// Use CTransaction for the constant parts of the
// transaction to avoid rehashing.
const CTransaction txConst(mergedTx);
// Sign what we can:
for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
CTxIn& txin = mergedTx.vin[i];
@ -760,10 +763,10 @@ UniValue signrawtransaction(const UniValue& params, bool fHelp)
// ... and merge in other signatures:
BOOST_FOREACH(const CMutableTransaction& txv, txVariants) {
txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, txv.vin[i].scriptSig);
txin.scriptSig = CombineSignatures(prevPubKey, txConst, i, txin.scriptSig, txv.vin[i].scriptSig);
}
ScriptError serror = SCRIPT_ERR_OK;
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i), &serror)) {
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i), &serror)) {
TxInErrorToJSON(txin, vErrors, ScriptErrorString(serror));
}
}