// 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 <boost/assign/list_of.hpp>
#include "kernel.h"
+#include "kernel_worker.h"
#include "txdb.h"
extern unsigned int nStakeMaxAge;
(149000, 0x48f2bdc4u )
(160000, 0x789df0f0u )
(200000, 0x01ec1503u )
+ (221047, 0x0b39ef50u )
+ (243100, 0xe928d83au )
;
// Hard checkpoints of stake modifiers to ensure they are deterministic (testNet)
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"))
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
return true;
}
-// Precompute hashing state for static part of kernel
-void GetKernelMidstate(uint64_t nStakeModifier, uint32_t nBlockTime, uint32_t nTxOffset, uint32_t nInputTxTime, uint32_t nOut, SHA256_CTX &ctx)
-{
- // Build static part of kernel
- CDataStream ssKernel(SER_GETHASH, 0);
- ssKernel << nStakeModifier;
- ssKernel << nBlockTime << nTxOffset << nInputTxTime << nOut;
- CDataStream::const_iterator it = ssKernel.begin();
-
- // Init sha256 context and update it
- // with first 24 bytes of kernel
- SHA256_Init(&ctx);
- SHA256_Update(&ctx, (unsigned char*)&it[0], 8 + 16);
-}
-
-
-class ScanMidstateWorker
-{
-public:
- ScanMidstateWorker()
- { }
- ScanMidstateWorker(SHA256_CTX ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, uint32_t nIntervalBegin, uint32_t nIntervalEnd)
- {
- workerSolutions = vector<std::pair<uint256,uint32_t> >();
-
- workerCtx = ctx;
- this->nBits = nBits;
- this->nInputTxTime = nInputTxTime;
- this->nValueIn = nValueIn;
- this->nIntervalBegin = nIntervalBegin;
- this->nIntervalEnd = nIntervalEnd;
- }
-
- void Do()
- {
- CBigNum bnTargetPerCoinDay;
- bnTargetPerCoinDay.SetCompact(nBits);
-
- // Get maximum possible target to filter out the majority of obviously insufficient hashes
- CBigNum bnMaxTargetPerCoinDay = bnTargetPerCoinDay * CBigNum(nValueIn) * nStakeMaxAge / COIN / (24 * 60 * 60);
- uint256 maxTarget = bnMaxTargetPerCoinDay.getuint256();
-
- SHA256_CTX ctx = workerCtx;
-
- // Search forward in time from the given timestamp
- // Stopping search in case of shutting down
- for (uint32_t nTimeTx=nIntervalBegin; nTimeTx<nIntervalEnd && !fShutdown; nTimeTx++)
- {
- // Complete first hashing iteration
- uint256 hash1;
- SHA256_Update(&ctx, (unsigned char*)&nTimeTx, 4);
- SHA256_Final((unsigned char*)&hash1, &ctx);
-
- // Restore context
- ctx = workerCtx;
-
- // Finally, calculate kernel hash
- uint256 hashProofOfStake;
- SHA256((unsigned char*)&hash1, sizeof(hashProofOfStake), (unsigned char*)&hashProofOfStake);
-
-
- // Skip if hash doesn't satisfy the maximum target
- if (hashProofOfStake > maxTarget)
- continue;
-
- CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60);
- CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay;
-
- if (bnTargetProofOfStake >= CBigNum(hashProofOfStake))
- {
- workerSolutions.push_back(std::pair<uint256,uint32_t>(hashProofOfStake, nTimeTx));
- }
- }
- }
-
- vector<std::pair<uint256,uint32_t> > GetSolutions()
- {
- return workerSolutions;
- }
-
-private:
- SHA256_CTX workerCtx;
- std::vector<std::pair<uint256,uint32_t> > workerSolutions;
-
- uint32_t nBits;
- uint32_t nInputTxTime;
- int64_t nValueIn;
- uint32_t nIntervalBegin;
- uint32_t nIntervalEnd;
-};
-
-// Scan given midstate for solution
-bool ScanMidstateForward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair<uint32_t, uint32_t> &SearchInterval, std::vector<std::pair<uint256, uint32_t> > &solutions)
+// Scan given kernel for solution
+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)
{
// TODO: custom threads amount
uint32_t nThreads = boost::thread::hardware_concurrency();
+ if (nThreads == 0)
+ {
+ nThreads = 1;
+ printf("Warning: hardware_concurrency() failed in %s:%d\n", __FILE__, __LINE__);
+ }
+ uint32_t nPart = (SearchInterval.second - SearchInterval.first) / nThreads;
- uint32_t nBegin = SearchInterval.first;
- uint32_t nEnd = SearchInterval.second;
- uint32_t nPart = (nEnd - nBegin) / nThreads;
-
- ScanMidstateWorker *workers = new ScanMidstateWorker[nThreads];
+ KernelWorker *workers = new KernelWorker[nThreads];
boost::thread_group group;
for(size_t i = 0; i < nThreads; i++)
{
- uint32_t nIntervalBegin = nBegin + nPart * i;
- uint32_t nIntervalEnd = nBegin + nPart * (i + 1);
-
- workers[i] = ScanMidstateWorker(ctx, nBits, nInputTxTime, nValueIn, nIntervalBegin, nIntervalEnd);
-
- boost::function<void()> workerFnc = boost::bind(&ScanMidstateWorker::Do, &workers[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<void()> workerFnc = boost::bind(&KernelWorker::Do, &workers[i]);
group.create_thread(workerFnc);
}
return true;
}
-// Scan given midstate for solution
-bool ScanMidstateBackward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair<uint32_t, uint32_t> &SearchInterval, std::pair<uint256, uint32_t> &solution)
-{
- CBigNum bnTargetPerCoinDay;
- bnTargetPerCoinDay.SetCompact(nBits);
-
- // Get maximum possible target to filter out the majority of obviously insufficient hashes
- CBigNum bnMaxTargetPerCoinDay = bnTargetPerCoinDay * CBigNum(nValueIn) * nStakeMaxAge / COIN / (24 * 60 * 60);
- uint256 maxTarget = bnMaxTargetPerCoinDay.getuint256();
-
- SHA256_CTX ctxCopy = ctx;
-
- // Search backward in time from the given timestamp
- // Stopping search in case of shutting down
- for (uint32_t nTimeTx=SearchInterval.first; nTimeTx>SearchInterval.second && !fShutdown; nTimeTx--)
- {
- // Complete first hashing iteration
- uint256 hash1;
- SHA256_Update(&ctxCopy, (unsigned char*)&nTimeTx, 4);
- SHA256_Final((unsigned char*)&hash1, &ctxCopy);
-
- // Restore context
- ctxCopy = ctx;
-
- // Finally, calculate kernel hash
- uint256 hashProofOfStake;
- SHA256((unsigned char*)&hash1, sizeof(hashProofOfStake), (unsigned char*)&hashProofOfStake);
-
- // Skip if hash doesn't satisfy the maximum target
- if (hashProofOfStake > maxTarget)
- continue;
-
- CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60);
- CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay;
-
- if (bnTargetProofOfStake >= CBigNum(hashProofOfStake))
- {
- solution.first = hashProofOfStake;
- solution.second = nTimeTx;
-
- return true;
- }
- }
-
- return false;
-}
-
// Check kernel hash target and coinstake signature
bool CheckProofOfStake(const CTransaction& tx, unsigned int nBits, uint256& hashProofOfStake, uint256& targetProofOfStake)
{
git://git.novaco.in / novacoin.git / blobdiff