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| author | Johnson Lau <jl2012@xbt.hk> | 2017-01-18 16:12:26 +0800 |
|---|---|---|
| committer | Johnson Lau <jl2012@xbt.hk> | 2017-01-19 16:09:57 +0800 |
| commit | 0da49b5926b678b2ec35fabe37034f3d2e8385f4 (patch) | |
| tree | c581bc45d31ab66e4f69e39e468bee17eb0fcea2 /src/script | |
| parent | 6696b4635ceb9b47aaa63244bff9032fa7b08354 (diff) | |
| download | bitcoin-0da49b5926b678b2ec35fabe37034f3d2e8385f4.tar.xz | |
Skip precompute sighash for transactions without witness
Diffstat (limited to 'src/script')
| -rw-r--r-- | src/script/interpreter.cpp | 17 | ||||
| -rw-r--r-- | src/script/interpreter.h | 1 |
2 files changed, 12 insertions, 6 deletions
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp index f9b7835882..7d5d2092f8 100644 --- a/src/script/interpreter.cpp +++ b/src/script/interpreter.cpp @@ -1170,9 +1170,13 @@ uint256 GetOutputsHash(const CTransaction& txTo) { PrecomputedTransactionData::PrecomputedTransactionData(const CTransaction& txTo) { - hashPrevouts = GetPrevoutHash(txTo); - hashSequence = GetSequenceHash(txTo); - hashOutputs = GetOutputsHash(txTo); + // Cache is calculated only for transactions with witness + if (txTo.HasWitness()) { + hashPrevouts = GetPrevoutHash(txTo); + hashSequence = GetSequenceHash(txTo); + hashOutputs = GetOutputsHash(txTo); + ready = true; + } } uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion, const PrecomputedTransactionData* cache) @@ -1181,18 +1185,19 @@ uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsig uint256 hashPrevouts; uint256 hashSequence; uint256 hashOutputs; + const bool cacheready = cache && cache->ready; if (!(nHashType & SIGHASH_ANYONECANPAY)) { - hashPrevouts = cache ? cache->hashPrevouts : GetPrevoutHash(txTo); + hashPrevouts = cacheready ? cache->hashPrevouts : GetPrevoutHash(txTo); } if (!(nHashType & SIGHASH_ANYONECANPAY) && (nHashType & 0x1f) != SIGHASH_SINGLE && (nHashType & 0x1f) != SIGHASH_NONE) { - hashSequence = cache ? cache->hashSequence : GetSequenceHash(txTo); + hashSequence = cacheready ? cache->hashSequence : GetSequenceHash(txTo); } if ((nHashType & 0x1f) != SIGHASH_SINGLE && (nHashType & 0x1f) != SIGHASH_NONE) { - hashOutputs = cache ? cache->hashOutputs : GetOutputsHash(txTo); + hashOutputs = cacheready ? cache->hashOutputs : GetOutputsHash(txTo); } else if ((nHashType & 0x1f) == SIGHASH_SINGLE && nIn < txTo.vout.size()) { CHashWriter ss(SER_GETHASH, 0); ss << txTo.vout[nIn]; diff --git a/src/script/interpreter.h b/src/script/interpreter.h index 79894c5300..c6385cb519 100644 --- a/src/script/interpreter.h +++ b/src/script/interpreter.h @@ -113,6 +113,7 @@ bool CheckSignatureEncoding(const std::vector<unsigned char> &vchSig, unsigned i struct PrecomputedTransactionData { uint256 hashPrevouts, hashSequence, hashOutputs; + bool ready = false; PrecomputedTransactionData(const CTransaction& tx); }; |