extern unsigned int nModifierUpgradeTime;
// MODIFIER_INTERVAL: time to elapse before new modifier is computed
-extern unsigned int nModifierInterval;
+extern const unsigned int nModifierInterval;
extern bool fCoinsDataActual;
// Preloaded coins metadata
// txid => ((txindex, (tx, vout.n)), (block, modifier))
-typedef std::map<uint256, std::pair<std::pair<CTxIndex, std::pair<const CWalletTx*,unsigned int> >, std::pair<CBlock, uint64> > > MetaMap;
+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);