extern unsigned int nModifierUpgradeTime;
// MODIFIER_INTERVAL: time to elapse before new modifier is computed
-extern const unsigned int nModifierInterval;
-
-extern bool fCoinsDataActual;
+extern unsigned int nModifierInterval;
// MODIFIER_INTERVAL_RATIO:
// ratio of group interval length between the last group and the first group
bool IsFixedModifierInterval(unsigned int nTimeBlock);
// Compute the hash modifier for proof-of-stake
-bool ComputeNextStakeModifier(const CBlockIndex* pindexCurrent, uint64& nStakeModifier, bool& fGeneratedStakeModifier);
+bool ComputeNextStakeModifier(const CBlockIndex* pindexCurrent, uint64_t& nStakeModifier, bool& fGeneratedStakeModifier);
// The stake modifier used to hash for a stake kernel is chosen as the stake
// modifier about a selection interval later than the coin generating the kernel
-bool GetKernelStakeModifier(uint256 hashBlockFrom, uint64& nStakeModifier);
+bool GetKernelStakeModifier(uint256 hashBlockFrom, uint64_t& nStakeModifier);
// Check whether stake kernel meets hash target
// Sets hashProofOfStake on success return
-bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned int nTxPrevOffset, const CTransaction& txPrev, const COutPoint& prevout, unsigned int nTimeTx, uint256& hashProofOfStake, uint256& targetProofOfStake, bool fPrintProofOfStake=false);
-
-// Coins scanning options
-typedef struct KernelSearchSettings {
- unsigned int nBits; // Packed difficulty
- unsigned int nTime; // Basic time
- unsigned int nOffset; // Offset inside CoinsSet (isn't used yet)
- unsigned int nLimit; // Coins to scan (isn't used yet)
- unsigned int nSearchInterval; // Number of seconds allowed to go into the past
-} KernelSearchSettings;
-
-typedef std::set<std::pair<const CWalletTx*,unsigned int> > CoinsSet;
+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);
-// Preloaded coins metadata
-// txid => ((txindex, (tx, vout.n)), (block, modifier))
-typedef std::map<std::pair<uint256, unsigned int>, std::pair<std::pair<CTxIndex, std::pair<const CWalletTx*,unsigned int> >, std::pair<CBlock, uint64> > > MetaMap;
-
-// Scan given coins set for kernel solution
-bool ScanForStakeKernelHash(MetaMap &mapMeta, KernelSearchSettings &settings, CoinsSet::value_type &kernelcoin, unsigned int &nTimeTx, unsigned int &nBlockTime);
+// Scan given kernel for solutions
+bool ScanKernelForward(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair<uint32_t, uint32_t> &SearchInterval, std::vector<std::pair<uint256, uint32_t> > &solutions);
// Check kernel hash target and coinstake signature
// Sets hashProofOfStake on success return
bool CheckProofOfStake(const CTransaction& tx, unsigned int nBits, uint256& hashProofOfStake, uint256& targetProofOfStake);
// Get stake modifier checksum
-unsigned int GetStakeModifierChecksum(const CBlockIndex* pindex);
+uint32_t GetStakeModifierChecksum(const CBlockIndex* pindex);
// Check stake modifier hard checkpoints
-bool CheckStakeModifierCheckpoints(int nHeight, unsigned int nStakeModifierChecksum);
+bool CheckStakeModifierCheckpoints(int nHeight, uint32_t nStakeModifierChecksum);
// Get time weight using supplied timestamps
-int64 GetWeight(int64 nIntervalBeginning, int64 nIntervalEnd);
-
-#endif // PPCOIN_KERNEL_H
+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 std::min(nIntervalEnd - nIntervalBeginning - nStakeMinAge, (int64_t)nStakeMaxAge);
+}
+
+#endif // PPCOIN_KERNEL_H
\ No newline at end of file
git://git.novaco.in / novacoin.git / blobdiff