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author | Jeremy Rubin <j@rubin.io> | 2020-02-05 12:31:20 -0800 |
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committer | Jeremy Rubin <j@rubin.io> | 2020-08-07 11:08:40 -0700 |
commit | 9ab4cafabda227ccee5b241d7690fc67f9a27221 (patch) | |
tree | c0a4c4bd8aeaf77ad532f9dd14554d0f6417cda9 /src/script/interpreter.cpp | |
parent | 6510d0ff4173a7b01d6728051303c7c38eb34533 (diff) | |
download | bitcoin-9ab4cafabda227ccee5b241d7690fc67f9a27221.tar.xz |
Refactor Get{Prevout,Sequence,Outputs}Hash to Get{Prevouts,Sequences,Outputs}SHA256.
Several proposals (Taproot, MuHash, CTV) require access to the single
hash.
Diffstat (limited to 'src/script/interpreter.cpp')
-rw-r--r-- | src/script/interpreter.cpp | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp index 39feb4ccc9..7b2457a5e3 100644 --- a/src/script/interpreter.cpp +++ b/src/script/interpreter.cpp @@ -1258,34 +1258,37 @@ public: } }; +/** Compute the (single) SHA256 of the concatenation of all prevouts of a tx. */ template <class T> -uint256 GetPrevoutHash(const T& txTo) +uint256 GetPrevoutsSHA256(const T& txTo) { CHashWriter ss(SER_GETHASH, 0); for (const auto& txin : txTo.vin) { ss << txin.prevout; } - return ss.GetHash(); + return ss.GetSHA256(); } +/** Compute the (single) SHA256 of the concatenation of all nSequences of a tx. */ template <class T> -uint256 GetSequenceHash(const T& txTo) +uint256 GetSequencesSHA256(const T& txTo) { CHashWriter ss(SER_GETHASH, 0); for (const auto& txin : txTo.vin) { ss << txin.nSequence; } - return ss.GetHash(); + return ss.GetSHA256(); } +/** Compute the (single) SHA256 of the concatenation of all txouts of a tx. */ template <class T> -uint256 GetOutputsHash(const T& txTo) +uint256 GetOutputsSHA256(const T& txTo) { CHashWriter ss(SER_GETHASH, 0); for (const auto& txout : txTo.vout) { ss << txout; } - return ss.GetHash(); + return ss.GetSHA256(); } } // namespace @@ -1297,9 +1300,9 @@ void PrecomputedTransactionData::Init(const T& txTo) // Cache is calculated only for transactions with witness if (txTo.HasWitness()) { - hashPrevouts = GetPrevoutHash(txTo); - hashSequence = GetSequenceHash(txTo); - hashOutputs = GetOutputsHash(txTo); + hashPrevouts = SHA256Uint256(GetPrevoutsSHA256(txTo)); + hashSequence = SHA256Uint256(GetSequencesSHA256(txTo)); + hashOutputs = SHA256Uint256(GetOutputsSHA256(txTo)); } m_ready = true; @@ -1329,16 +1332,16 @@ uint256 SignatureHash(const CScript& scriptCode, const T& txTo, unsigned int nIn const bool cacheready = cache && cache->m_ready; if (!(nHashType & SIGHASH_ANYONECANPAY)) { - hashPrevouts = cacheready ? cache->hashPrevouts : GetPrevoutHash(txTo); + hashPrevouts = cacheready ? cache->hashPrevouts : SHA256Uint256(GetPrevoutsSHA256(txTo)); } if (!(nHashType & SIGHASH_ANYONECANPAY) && (nHashType & 0x1f) != SIGHASH_SINGLE && (nHashType & 0x1f) != SIGHASH_NONE) { - hashSequence = cacheready ? cache->hashSequence : GetSequenceHash(txTo); + hashSequence = cacheready ? cache->hashSequence : SHA256Uint256(GetSequencesSHA256(txTo)); } if ((nHashType & 0x1f) != SIGHASH_SINGLE && (nHashType & 0x1f) != SIGHASH_NONE) { - hashOutputs = cacheready ? cache->hashOutputs : GetOutputsHash(txTo); + hashOutputs = cacheready ? cache->hashOutputs : SHA256Uint256(GetOutputsSHA256(txTo)); } else if ((nHashType & 0x1f) == SIGHASH_SINGLE && nIn < txTo.vout.size()) { CHashWriter ss(SER_GETHASH, 0); ss << txTo.vout[nIn]; |