#include "main.h"
+// ChainDB upgrade time
+extern unsigned int nModifierUpgradeTime;
+
// MODIFIER_INTERVAL: time to elapse before new modifier is computed
extern unsigned int nModifierInterval;
// ratio of group interval length between the last group and the first group
static const int MODIFIER_INTERVAL_RATIO = 3;
+// Whether the given block is subject to new modifier protocol
+bool IsFixedModifierInterval(unsigned int nTimeBlock);
+
// Compute the hash modifier for proof-of-stake
-bool ComputeNextStakeModifier(const CBlockIndex* pindexPrev, uint64& nStakeModifier, bool& fGeneratedStakeModifier);
+bool ComputeNextStakeModifier(const CBlockIndex* pindexCurrent, uint64& nStakeModifier, bool& fGeneratedStakeModifier);
// 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, bool fPrintProofOfStake=false);
+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);
// Check kernel hash target and coinstake signature
// Sets hashProofOfStake on success return
-bool CheckProofOfStake(const CTransaction& tx, unsigned int nBits, uint256& hashProofOfStake);
-
-// Check whether the coinstake timestamp meets protocol
-bool CheckCoinStakeTimestamp(int64 nTimeBlock, int64 nTimeTx);
+bool CheckProofOfStake(const CTransaction& tx, unsigned int nBits, uint256& hashProofOfStake, uint256& targetProofOfStake);
// Get stake modifier checksum
unsigned int GetStakeModifierChecksum(const CBlockIndex* pindex);
// Check stake modifier hard checkpoints
bool CheckStakeModifierCheckpoints(int nHeight, unsigned int nStakeModifierChecksum);
+// Get time weight using supplied timestamps
+int64 GetWeight(int64 nIntervalBeginning, int64 nIntervalEnd);
+
#endif // PPCOIN_KERNEL_H