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Rangeproof caching

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instagibbs 2016-07-12 11:02:06 -04:00 • committed by Gregory Sanders
parent dfab197543
commit 66ab07bd1b
7 changed files with 63 additions and 17 deletions
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32
src/script/sigcache.cpp
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@ -88,6 +88,9 @@ public:
* signatureCache could be made local to VerifySignature.
*/
static CSignatureCache signatureCache;
static CSignatureCache rangeProofCache;
}
// To be called once in AppInit2/TestingSetup to initialize the signatureCache
@ -101,6 +104,17 @@ void InitSignatureCache()
(nElems*sizeof(uint256)) >>20, nMaxCacheSize>>20, nElems);
}
// To be called once in AppInit2/TestingSetup to initialize the rangeproof cache
void InitRangeproofCache()
{
// nMaxCacheSize is unsigned. If -maxsigcachesize is set to zero,
// setup_bytes creates the minimum possible cache (2 elements).
size_t nMaxCacheSize = std::min(std::max((int64_t)0, GetArg("-maxsigcachesize", DEFAULT_MAX_SIG_CACHE_SIZE)), MAX_MAX_SIG_CACHE_SIZE) * ((size_t) 1 << 20);
size_t nElems = rangeProofCache.setup_bytes(nMaxCacheSize);
LogPrintf("Using %zu MiB out of %zu requested for rangeproof cache, able to store %zu elements\n",
(nElems*sizeof(uint256)) >>20, nMaxCacheSize>>20, nElems);
}
bool CachingTransactionSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
{
uint256 entry;
@ -113,3 +127,21 @@ bool CachingTransactionSignatureChecker::VerifySignature(const std::vector<unsig
signatureCache.Set(entry);
return true;
}
bool CachingRangeProofChecker::VerifyRangeProof(const std::vector<unsigned char>& vchRangeProof, const std::vector<unsigned char>& vchCommitment, const secp256k1_context* secp256k1_ctx_verify_amounts) const
{
CPubKey pubkey(vchCommitment);
uint256 entry;
rangeProofCache.ComputeEntry(entry, uint256(), vchRangeProof, pubkey);
if (rangeProofCache.Get(entry, !store)) {
return true;
}
uint64_t min_value, max_value;
if (!secp256k1_rangeproof_verify(secp256k1_ctx_verify_amounts, &min_value, &max_value, &vchCommitment[0], vchRangeProof.data(), vchRangeProof.size())) {
return false;
}
return true;
}