X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fkernel.h;h=eca9744516ed8060935aa5a4ccf7ba472065f1dd;hb=126e51d5d96f8bc2c900df18af5827c279967dcc;hp=a94ace22ce73c6a21c2cdd56557be48993a2c4ca;hpb=2bc0f8cca250b65426f9fecf44d176dc1698f399;p=novacoin.git diff --git a/src/kernel.h b/src/kernel.h index a94ace2..eca9744 100644 --- a/src/kernel.h +++ b/src/kernel.h @@ -7,14 +7,14 @@ #include "main.h" #include "wallet.h" +using namespace std; + // ChainDB upgrade time extern unsigned int nModifierUpgradeTime; // MODIFIER_INTERVAL: time to elapse before new modifier is computed extern unsigned int nModifierInterval; -extern bool fCoinsDataActual; - // MODIFIER_INTERVAL_RATIO: // ratio of group interval length between the last group and the first group static const int MODIFIER_INTERVAL_RATIO = 3; @@ -33,14 +33,12 @@ bool GetKernelStakeModifier(uint256 hashBlockFrom, uint64_t& nStakeModifier); // Sets hashProofOfStake on success return bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, uint32_t nTxPrevOffset, const CTransaction& txPrev, const COutPoint& prevout, uint32_t nTimeTx, uint256& hashProofOfStake, uint256& targetProofOfStake, bool fPrintProofOfStake=false); -// Scan given coins set for kernel solution -bool ScanForStakeKernelHash(MetaMap &mapMeta, uint32_t nBits, uint32_t nTime, uint32_t nSearchInterval, CoinsSet::value_type &kernelcoin, uint32_t &nTimeTx, uint32_t &nBlockTime, uint64_t &nKernelsTried, uint64_t &nCoinDaysTried); - // Precompute hashing state for static part of kernel void GetKernelMidstate(uint64_t nStakeModifier, uint32_t nBlockTime, uint32_t nTxOffset, uint32_t nInputTxTime, uint32_t nOut, SHA256_CTX &ctx); // Scan given midstate for kernel solutions bool ScanMidstateForward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair &SearchInterval, std::pair &solution); +bool ScanMidstateBackward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair &SearchInterval, std::pair &solution); // Check kernel hash target and coinstake signature // Sets hashProofOfStake on success return @@ -53,6 +51,16 @@ uint32_t GetStakeModifierChecksum(const CBlockIndex* pindex); bool CheckStakeModifierCheckpoints(int nHeight, uint32_t nStakeModifierChecksum); // Get time weight using supplied timestamps -int64_t GetWeight(int64_t nIntervalBeginning, int64_t nIntervalEnd); +inline int64_t GetWeight(int64_t nIntervalBeginning, int64_t nIntervalEnd) +{ + // Kernel hash weight starts from 0 at the 30-day min age + // this change increases active coins participating the hash and helps + // to secure the network when proof-of-stake difficulty is low + // + // Maximum TimeWeight is 90 days. + + return min(nIntervalEnd - nIntervalBeginning - nStakeMinAge, (int64_t)nStakeMaxAge); +} + #endif // PPCOIN_KERNEL_H