Minor optimization in PoS kernel: call scrypt_blockhash once time instead of multiple...

[novacoin.git] / src / kernel.cpp

diff --git a/src/kernel.cpp b/src/kernel.cpp
index ef08a86..71a14e3 100644 (file)
--- a/src/kernel.cpp
+++ b/src/kernel.cpp
@@ -280,6 +280,7 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned
     int64 nValueIn = txPrev.vout[prevout.n].nValue;
 
     int64 nTimeWeight;
+    uint256 hashBlockFrom = blockFrom.GetHash();
 
     // Kernel hash weight starts from 0 at the 30-day min age
     // this change increases active coins participating the hash and helps
@@ -305,7 +306,7 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned
     int nStakeModifierHeight = 0;
     int64 nStakeModifierTime = 0;
 
-    if (!GetKernelStakeModifier(blockFrom.GetHash(), nStakeModifier, nStakeModifierHeight, nStakeModifierTime, fPrintProofOfStake))
+    if (!GetKernelStakeModifier(hashBlockFrom, nStakeModifier, nStakeModifierHeight, nStakeModifierTime, fPrintProofOfStake))
         return false;
     ss << nStakeModifier;
 
@@ -316,7 +317,7 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned
         printf("CheckStakeKernelHash() : using modifier 0x%016"PRI64x" at height=%d timestamp=%s for block from height=%d timestamp=%s\n",
             nStakeModifier, nStakeModifierHeight,
             DateTimeStrFormat(nStakeModifierTime).c_str(),
-            mapBlockIndex[blockFrom.GetHash()]->nHeight,
+            mapBlockIndex[hashBlockFrom]->nHeight,
             DateTimeStrFormat(blockFrom.GetBlockTime()).c_str());
         printf("CheckStakeKernelHash() : check protocol=%s modifier=0x%016"PRI64x" nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashProof=%s\n",
             "0.3",
@@ -333,7 +334,7 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned
         printf("CheckStakeKernelHash() : using modifier 0x%016"PRI64x" at height=%d timestamp=%s for block from height=%d timestamp=%s\n",
             nStakeModifier, nStakeModifierHeight, 
             DateTimeStrFormat(nStakeModifierTime).c_str(),
-            mapBlockIndex[blockFrom.GetHash()]->nHeight,
+            mapBlockIndex[hashBlockFrom]->nHeight,
             DateTimeStrFormat(blockFrom.GetBlockTime()).c_str());
         printf("CheckStakeKernelHash() : pass protocol=%s modifier=0x%016"PRI64x" nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashProof=%s\n",
             "0.3",