X-Git-Url: https://git.novaco.in/?p=novacoin.git;a=blobdiff_plain;f=src%2Fkernel.cpp;h=b18ae2b7c180f836f687b46f019c134ba17cd513;hp=46d8ac0a4e95950c94c29b3eb232658719148d66;hb=89d4073d0a6545330af16bb8b2352881b6f55cf5;hpb=77a43545b4491b9703d803765da9059d2bdd5aaa diff --git a/src/kernel.cpp b/src/kernel.cpp index 46d8ac0..b18ae2b 100644 --- a/src/kernel.cpp +++ b/src/kernel.cpp @@ -1,10 +1,14 @@ // Copyright (c) 2012-2013 The PPCoin developers +// Copyright (c) 2013-2015 The Novacoin developers +// Distributed under the MIT/X11 software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. // Distributed under the MIT/X11 software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #include #include "kernel.h" +#include "kernel_worker.h" #include "txdb.h" extern unsigned int nStakeMaxAge; @@ -28,15 +32,13 @@ typedef std::map MapModifierCheckpoints; static std::map mapStakeModifierCheckpoints = boost::assign::map_list_of ( 0, 0x0e00670bu ) - ( 9690, 0x97dcdafau ) ( 12661, 0x5d84115du ) - ( 37092, 0xd230afccu ) - ( 44200, 0x05370164u ) - ( 65000, 0xc8e7be6au ) - ( 68600, 0x73a8cc4cu ) - ( 92161, 0xe21a911au ) - ( 98661, 0xd20c44d4u ) (143990, 0x9c592c78u ) + (149000, 0x48f2bdc4u ) + (160000, 0x789df0f0u ) + (200000, 0x01ec1503u ) + (221047, 0x0b39ef50u ) + (243100, 0xe928d83au ) ; // Hard checkpoints of stake modifiers to ensure they are deterministic (testNet) @@ -45,24 +47,60 @@ static std::map mapStakeModifierCheckpointsTestNet = ( 0, 0x0e00670bu ) ; +// Pregenerated entropy bits table (from genesis to #9689) +// +// Bits are packed into array of 256 bit integers: +// +// * array index calculated as nHeight / 256 +// * position of bit is calculated as nHeight & 0xFF. +// +const uint256 entropyStore[] = { + uint256("0x4555b4dcc1d690ddd9b810c90c66e82b18bf4f43cc887246c418383ec120a5ab"), + uint256("0xaa6d1198412fa77608addf6549c9198a22155e8afd7a9ded6179f6b7cfc66b0c"), + uint256("0x9442fabfa4116fb14a9769c2eea003845a1f5c3a0260f36b497d68f3a3cd4078"), + uint256("0x0e769042a9a98e42388195d699574b822d06515f7053ad884c53d7ee059f05b1"), + uint256("0x7005aac20baf70251aebfe3f1b95987d83ef1e3e6963de8fed601d4dd07bf7cf"), + uint256("0x58952c5c3de188f2e33c38d3f53d7bf44f9bc545a4289d266696273fa821be66"), + uint256("0x50b6c2ed780c08aaec3f7665b1b6004206243e3866456fc910b83b52d07eeb63"), + uint256("0x563841eefca85ba3384986c58100408ae3f1ba2ac727e1ac910ce154a06c702f"), + uint256("0x79275b03938b3e27a9b01a7f7953c6c487c58355f5d4169accfbb800213ffd13"), + uint256("0xd783f2538b3ed18f135af90adc687c5646d93aeaeaabc6667be94f7aa0a2d366"), + uint256("0xb441d0c175c40c8e88b09d88ea008af79cbed2d28219427d2e72fda682974db8"), + uint256("0x3204c43bd41f2e19628af3b0c9aca3db15bca4c8705d51056e7b17a319c04715"), + uint256("0x7e80e6ab7857d8f2f261a0a49c783bd800b365b8c9b85cc0e13f73904b0dcaa9"), + uint256("0xefaaee60ed82d2ad145c0e347941fdb131eb8fd289a45eef07121a93f283c5f1"), + uint256("0x3efc86e4334da332c1fd4c12513c40cff689f3efdc7f9913230822adacdda4f9"), + uint256("0xf0d6b8f38599a017fa35d1fbbf9ef51eca5ebc5b286aadba40c4c3e1d9bace0c"), + uint256("0x286a67f27323486036a0a92d35382fc8963c0c00bad331723318b4b9fdb2b56e"), + uint256("0xecbfaaa6567c54f08c4d5bd0118a2d7b58740f42cbfc73aa1536c1f5f76de87c"), + uint256("0xf9a4de1c5c46520de5aaf10d3796cf0e27ddce98b3398357f5726a949664e308"), + uint256("0xd75e6c4dc4be08401e3478d2467d9ab96a62af4f255c04a82c41af0de0a487bb"), + uint256("0x1a82c3bc6ad6047294c16571b5e2b7316c97bf8813e7da15798b9820d67e39f2"), + uint256("0xb49be0080de564e01829ded7e7971979565a741c5975dc9978dcc020192d396c"), + uint256("0x0d8eed113be67663b5a15a0625a9b49792b5ea59c005c4f405914877acab7000"), + uint256("0x8f9d46e2bc05a218ffa942965b747056197d393b097085523640cd59e07fe7c7"), + uint256("0x7a63ab40bc7f40ac2ebe9ede438d97b45fa6ed6f8419016da8d5f7a670111dda"), + uint256("0x63fbcc080448c43d6cf915c958314feff7a95a52ba43a68c05fc281d3a522d25"), + uint256("0xf834cf824c326d3ea861ea1e85dc3289265e37045981e28208e7344a7f8081d7"), + uint256("0xb4edc22ec98cc49b2f5af5bae3f52f5e6058280f74f2c432c2dd89ae49acceb8"), + uint256("0x0fe596037dcf81bf5c64f39755261c404ed088af5c8c31dd7549b6657ee92365"), + uint256("0xbbad51a0aeba254b01d18c328de9e932b9b859b61e622c325d64e2211b5e413d"), + uint256("0xabf0194cc787be938bc51c7fdf1cae4ec79e65ebab8fa8b8f40541c44ef384b0"), + uint256("0x83bc12d6fdbd3e854cb91c4ca7dfba3c38e8714121af88c8a8abdb33e5002438"), + uint256("0x71a2513026cabaedcbe55aeb6dc8049e5b763a3f54f10c33dd333624f764b38c"), + uint256("0xee6725632ff5c025dff6a18cd059875dcae20f399b03bccba13d9d5fcf6d9d9a"), + uint256("0xa168a2741d1e7e50cc74b79f695c25ffd3576e6bd61353c2a20e569fd63b2dac"), + uint256("0x6e462d2a87bfde9398b6747f94a8ed6a01e4d96c5b4372df5c910c106c48bd13"), + uint256("0x8eeb696181957c4b22434028990f49cb30006827c73860e77e2eecf5c38be99d"), + uint256("0x3188aaa65877b166f05cdc48f55b1f77a7d6fb221c395596d990ae5647e9ba96") +}; + // Whether the given block is subject to new modifier protocol bool IsFixedModifierInterval(unsigned int nTimeBlock) { return (nTimeBlock >= (fTestNet? nModifierTestSwitchTime : nModifierSwitchTime)); } -// Get time weight -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 min(nIntervalEnd - nIntervalBeginning - nStakeMinAge, (int64_t)nStakeMaxAge); -} - // Get the last stake modifier and its generation time from a given block static bool GetLastStakeModifier(const CBlockIndex* pindex, uint64_t& nStakeModifier, int64_t& nModifierTime) { @@ -125,13 +163,13 @@ static bool SelectBlockFromCandidates(vector >& vSortedBy if (fSelected && hashSelection < hashBest) { hashBest = hashSelection; - *pindexSelected = (const CBlockIndex*) pindex; + *pindexSelected = pindex; } else if (!fSelected) { fSelected = true; hashBest = hashSelection; - *pindexSelected = (const CBlockIndex*) pindex; + *pindexSelected = pindex; } } if (fDebug && GetBoolArg("-printstakemodifier")) @@ -330,12 +368,12 @@ bool GetKernelStakeModifier(uint256 hashBlockFrom, uint64_t& nStakeModifier) // quantities so as to generate blocks faster, degrading the system back into // a proof-of-work situation. // -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) +bool CheckStakeKernelHash(uint32_t nBits, const CBlock& blockFrom, uint32_t nTxPrevOffset, const CTransaction& txPrev, const COutPoint& prevout, uint32_t nTimeTx, uint256& hashProofOfStake, uint256& targetProofOfStake, bool fPrintProofOfStake) { if (nTimeTx < txPrev.nTime) // Transaction timestamp violation return error("CheckStakeKernelHash() : nTime violation"); - unsigned int nTimeBlockFrom = blockFrom.GetBlockTime(); + uint32_t nTimeBlockFrom = blockFrom.GetBlockTime(); if (nTimeBlockFrom + nStakeMinAge > nTimeTx) // Min age requirement return error("CheckStakeKernelHash() : min age violation"); @@ -345,7 +383,7 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned uint256 hashBlockFrom = blockFrom.GetHash(); - CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)txPrev.nTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60); + CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)txPrev.nTime, (int64_t)nTimeTx) / COIN / nOneDay; targetProofOfStake = (bnCoinDayWeight * bnTargetPerCoinDay).getuint256(); // Calculate hash @@ -367,10 +405,10 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned DateTimeStrFormat(nStakeModifierTime).c_str(), mapBlockIndex[hashBlockFrom]->nHeight, DateTimeStrFormat(blockFrom.GetBlockTime()).c_str()); - printf("CheckStakeKernelHash() : check modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashProof=%s\n", + printf("CheckStakeKernelHash() : check modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashTarget=%s hashProof=%s\n", nStakeModifier, nTimeBlockFrom, nTxPrevOffset, txPrev.nTime, prevout.n, nTimeTx, - hashProofOfStake.ToString().c_str()); + targetProofOfStake.ToString().c_str(), hashProofOfStake.ToString().c_str()); } // Now check if proof-of-stake hash meets target protocol @@ -383,87 +421,57 @@ bool CheckStakeKernelHash(unsigned int nBits, const CBlock& blockFrom, unsigned DateTimeStrFormat(nStakeModifierTime).c_str(), mapBlockIndex[hashBlockFrom]->nHeight, DateTimeStrFormat(blockFrom.GetBlockTime()).c_str()); - printf("CheckStakeKernelHash() : pass modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashProof=%s\n", + printf("CheckStakeKernelHash() : pass modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashTarget=%s hashProof=%s\n", nStakeModifier, nTimeBlockFrom, nTxPrevOffset, txPrev.nTime, prevout.n, nTimeTx, - hashProofOfStake.ToString().c_str()); + targetProofOfStake.ToString().c_str(), hashProofOfStake.ToString().c_str()); } return true; } -// Scan given coins set for kernel solution -bool ScanForStakeKernelHash(MetaMap &mapMeta, KernelSearchSettings &settings, CoinsSet::value_type &kernelcoin, unsigned int &nTimeTx, unsigned int &nBlockTime, uint64_t &nKernelsTried, uint64_t &nCoinDaysTried) +// Scan given kernel for solution +bool ScanKernelForward(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair &SearchInterval, std::vector > &solutions) { - uint256 hashProofOfStake = 0; + // TODO: custom threads amount - // (txid, vout.n) => ((txindex, (tx, vout.n)), (block, modifier)) - for(MetaMap::const_iterator meta_item = mapMeta.begin(); meta_item != mapMeta.end(); meta_item++) + uint32_t nThreads = boost::thread::hardware_concurrency(); + if (nThreads == 0) { - if (!fCoinsDataActual) - break; - - CTxIndex txindex = (*meta_item).second.first.first; - CBlock block = (*meta_item).second.second.first; - uint64_t nStakeModifier = (*meta_item).second.second.second; - - // Get coin - CoinsSet::value_type pcoin = meta_item->second.first.second; - - static int nMaxStakeSearchInterval = 60; - - // only count coins meeting min age requirement - if (nStakeMinAge + block.nTime > settings.nTime - nMaxStakeSearchInterval) - continue; - - // Transaction offset inside block - unsigned int nTxOffset = txindex.pos.nTxPos - txindex.pos.nBlockPos; - - // Current timestamp scanning interval - unsigned int nCurrentSearchInterval = min((int64_t)settings.nSearchInterval, (int64_t)nMaxStakeSearchInterval); - - nBlockTime = block.nTime; - CBigNum bnTargetPerCoinDay; - bnTargetPerCoinDay.SetCompact(settings.nBits); - int64_t nValueIn = pcoin.first->vout[pcoin.second].nValue; - - // Search backward in time from the given timestamp - // Search nSearchInterval seconds back up to nMaxStakeSearchInterval - // Stopping search in case of shutting down or cache invalidation - for (unsigned int n=0; nnTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60); - CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay; + nThreads = 1; + printf("Warning: hardware_concurrency() failed in %s:%d\n", __FILE__, __LINE__); + } + uint32_t nPart = (SearchInterval.second - SearchInterval.first) / nThreads; - // Build kernel - CDataStream ss(SER_GETHASH, 0); - ss << nStakeModifier; - ss << nBlockTime << nTxOffset << pcoin.first->nTime << pcoin.second << nTimeTx; + KernelWorker *workers = new KernelWorker[nThreads]; - // Calculate kernel hash - hashProofOfStake = Hash(ss.begin(), ss.end()); + boost::thread_group group; + for(size_t i = 0; i < nThreads; i++) + { + uint32_t nBegin = SearchInterval.first + nPart * i; + uint32_t nEnd = SearchInterval.first + nPart * (i + 1); + workers[i] = KernelWorker(kernel, nBits, nInputTxTime, nValueIn, nBegin, nEnd); + boost::function workerFnc = boost::bind(&KernelWorker::Do, &workers[i]); + group.create_thread(workerFnc); + } - // Update statistics - nKernelsTried += 1; - nCoinDaysTried += bnCoinDayWeight.getuint64(); + group.join_all(); + solutions.clear(); - if (bnTargetProofOfStake >= CBigNum(hashProofOfStake)) - { - if (fDebug) - printf("nStakeModifier=0x%016" PRIx64 ", nBlockTime=%u nTxOffset=%u nTxPrevTime=%u nVout=%u nTimeTx=%u hashProofOfStake=%s Success=true\n", - nStakeModifier, nBlockTime, nTxOffset, pcoin.first->nTime, pcoin.second, nTimeTx, hashProofOfStake.GetHex().c_str()); + for(size_t i = 0; i < nThreads; i++) + { + std::vector > ws = workers[i].GetSolutions(); + solutions.insert(solutions.end(), ws.begin(), ws.end()); + } - kernelcoin = pcoin; - return true; - } + delete [] workers; - if (fDebug) - printf("nStakeModifier=0x%016" PRIx64 ", nBlockTime=%u nTxOffset=%u nTxPrevTime=%u nTxNumber=%u nTimeTx=%u hashProofOfStake=%s Success=false\n", - nStakeModifier, nBlockTime, nTxOffset, pcoin.first->nTime, pcoin.second, nTimeTx, hashProofOfStake.GetHex().c_str()); - } + if (solutions.size() == 0) + { + // no solutions + return false; } - return false; + return true; } // Check kernel hash target and coinstake signature @@ -502,7 +510,7 @@ bool CheckProofOfStake(const CTransaction& tx, unsigned int nBits, uint256& hash } // Get stake modifier checksum -unsigned int GetStakeModifierChecksum(const CBlockIndex* pindex) +uint32_t GetStakeModifierChecksum(const CBlockIndex* pindex) { assert (pindex->pprev || pindex->GetBlockHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)); // Hash previous checksum with flags, hashProofOfStake and nStakeModifier @@ -512,11 +520,11 @@ unsigned int GetStakeModifierChecksum(const CBlockIndex* pindex) ss << pindex->nFlags << pindex->hashProofOfStake << pindex->nStakeModifier; uint256 hashChecksum = Hash(ss.begin(), ss.end()); hashChecksum >>= (256 - 32); - return hashChecksum.Get64(); + return static_cast(hashChecksum.Get64()); } // Check stake modifier hard checkpoints -bool CheckStakeModifierCheckpoints(int nHeight, unsigned int nStakeModifierChecksum) +bool CheckStakeModifierCheckpoints(int nHeight, uint32_t nStakeModifierChecksum) { MapModifierCheckpoints& checkpoints = (fTestNet ? mapStakeModifierCheckpointsTestNet : mapStakeModifierCheckpoints);