#define PPCOIN_KERNEL_H
#include "main.h"
+#include "wallet.h"
// 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;
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_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);
+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);
+
+// Coins scanning options
+typedef struct KernelSearchSettings {
+ uint32_t nBits; // Packed difficulty
+ uint32_t nTime; // Basic time
+ uint32_t nOffset; // Offset inside CoinsSet (isn't used yet)
+ uint32_t nLimit; // Coins to scan (isn't used yet)
+ uint32_t nSearchInterval; // Number of seconds allowed to go into the past
+} KernelSearchSettings;
+
+typedef std::set<std::pair<const CWalletTx*,unsigned int> > CoinsSet;
+
+// 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_t> > > MetaMap;
+
+// Scan given coins set for kernel solution
+bool ScanForStakeKernelHash(MetaMap &mapMeta, KernelSearchSettings &settings, CoinsSet::value_type &kernelcoin, uint32_t &nTimeTx, uint32_t &nBlockTime, uint64_t &nKernelsTried, uint64_t &nCoinDaysTried);
// 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);
+int64_t GetWeight(int64_t nIntervalBeginning, int64_t nIntervalEnd);
#endif // PPCOIN_KERNEL_H