#define PPCOIN_KERNEL_H
#include "main.h"
-#include "wallet.h"
+
+extern unsigned int nStakeMaxAge;
// 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;
// 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);
-
-bool ScanInputForStakeKernelHash(CTransaction &tx, uint32_t nOut, uint32_t nBits, uint32_t nSearchInterval, std::pair<uint256, uint32_t> &solution);
+// 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 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 std::min(nIntervalEnd - nIntervalBeginning - nStakeMinAge, (int64_t)nStakeMaxAge);
+}
#endif // PPCOIN_KERNEL_H