diff options
Diffstat (limited to 'src/main.cpp')
| -rw-r--r-- | src/main.cpp | 660 |
1 files changed, 2 insertions, 658 deletions
diff --git a/src/main.cpp b/src/main.cpp index c8b4876c3e..50cff7f51d 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1244,7 +1244,7 @@ uint256 static GetOrphanRoot(const CBlockHeader* pblock) return pblock->GetHash(); } -int64 static GetBlockValue(int nHeight, int64 nFees) +int64 GetBlockValue(int nHeight, int64 nFees) { int64 nSubsidy = 50 * COIN; @@ -1284,7 +1284,7 @@ unsigned int ComputeMinWork(unsigned int nBase, int64 nTime) return bnResult.GetCompact(); } -unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock) +unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock) { unsigned int nProofOfWorkLimit = Params().ProofOfWorkLimit().GetCompact(); @@ -4124,662 +4124,6 @@ bool SendMessages(CNode* pto, bool fSendTrickle) - - - - - - - - -////////////////////////////////////////////////////////////////////////////// -// -// BitcoinMiner -// - -int static FormatHashBlocks(void* pbuffer, unsigned int len) -{ - unsigned char* pdata = (unsigned char*)pbuffer; - unsigned int blocks = 1 + ((len + 8) / 64); - unsigned char* pend = pdata + 64 * blocks; - memset(pdata + len, 0, 64 * blocks - len); - pdata[len] = 0x80; - unsigned int bits = len * 8; - pend[-1] = (bits >> 0) & 0xff; - pend[-2] = (bits >> 8) & 0xff; - pend[-3] = (bits >> 16) & 0xff; - pend[-4] = (bits >> 24) & 0xff; - return blocks; -} - -static const unsigned int pSHA256InitState[8] = -{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19}; - -void SHA256Transform(void* pstate, void* pinput, const void* pinit) -{ - SHA256_CTX ctx; - unsigned char data[64]; - - SHA256_Init(&ctx); - - for (int i = 0; i < 16; i++) - ((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]); - - for (int i = 0; i < 8; i++) - ctx.h[i] = ((uint32_t*)pinit)[i]; - - SHA256_Update(&ctx, data, sizeof(data)); - for (int i = 0; i < 8; i++) - ((uint32_t*)pstate)[i] = ctx.h[i]; -} - -// -// ScanHash scans nonces looking for a hash with at least some zero bits. -// It operates on big endian data. Caller does the byte reversing. -// All input buffers are 16-byte aligned. nNonce is usually preserved -// between calls, but periodically or if nNonce is 0xffff0000 or above, -// the block is rebuilt and nNonce starts over at zero. -// -unsigned int static ScanHash_CryptoPP(char* pmidstate, char* pdata, char* phash1, char* phash, unsigned int& nHashesDone) -{ - unsigned int& nNonce = *(unsigned int*)(pdata + 12); - for (;;) - { - // Crypto++ SHA256 - // Hash pdata using pmidstate as the starting state into - // pre-formatted buffer phash1, then hash phash1 into phash - nNonce++; - SHA256Transform(phash1, pdata, pmidstate); - SHA256Transform(phash, phash1, pSHA256InitState); - - // Return the nonce if the hash has at least some zero bits, - // caller will check if it has enough to reach the target - if (((unsigned short*)phash)[14] == 0) - return nNonce; - - // If nothing found after trying for a while, return -1 - if ((nNonce & 0xffff) == 0) - { - nHashesDone = 0xffff+1; - return (unsigned int) -1; - } - if ((nNonce & 0xfff) == 0) - boost::this_thread::interruption_point(); - } -} - -// Some explaining would be appreciated -class COrphan -{ -public: - CTransaction* ptx; - set<uint256> setDependsOn; - double dPriority; - double dFeePerKb; - - COrphan(CTransaction* ptxIn) - { - ptx = ptxIn; - dPriority = dFeePerKb = 0; - } - - void print() const - { - printf("COrphan(hash=%s, dPriority=%.1f, dFeePerKb=%.1f)\n", - ptx->GetHash().ToString().c_str(), dPriority, dFeePerKb); - BOOST_FOREACH(uint256 hash, setDependsOn) - printf(" setDependsOn %s\n", hash.ToString().c_str()); - } -}; - - -uint64 nLastBlockTx = 0; -uint64 nLastBlockSize = 0; - -// We want to sort transactions by priority and fee, so: -typedef boost::tuple<double, double, CTransaction*> TxPriority; -class TxPriorityCompare -{ - bool byFee; -public: - TxPriorityCompare(bool _byFee) : byFee(_byFee) { } - bool operator()(const TxPriority& a, const TxPriority& b) - { - if (byFee) - { - if (a.get<1>() == b.get<1>()) - return a.get<0>() < b.get<0>(); - return a.get<1>() < b.get<1>(); - } - else - { - if (a.get<0>() == b.get<0>()) - return a.get<1>() < b.get<1>(); - return a.get<0>() < b.get<0>(); - } - } -}; - -CBlockTemplate* CreateNewBlock(CReserveKey& reservekey) -{ - // Create new block - auto_ptr<CBlockTemplate> pblocktemplate(new CBlockTemplate()); - if(!pblocktemplate.get()) - return NULL; - CBlock *pblock = &pblocktemplate->block; // pointer for convenience - - // Create coinbase tx - CTransaction txNew; - txNew.vin.resize(1); - txNew.vin[0].prevout.SetNull(); - txNew.vout.resize(1); - CPubKey pubkey; - if (!reservekey.GetReservedKey(pubkey)) - return NULL; - txNew.vout[0].scriptPubKey << pubkey << OP_CHECKSIG; - - // Add our coinbase tx as first transaction - pblock->vtx.push_back(txNew); - pblocktemplate->vTxFees.push_back(-1); // updated at end - pblocktemplate->vTxSigOps.push_back(-1); // updated at end - - // Largest block you're willing to create: - unsigned int nBlockMaxSize = GetArg("-blockmaxsize", MAX_BLOCK_SIZE_GEN/2); - // Limit to betweeen 1K and MAX_BLOCK_SIZE-1K for sanity: - nBlockMaxSize = std::max((unsigned int)1000, std::min((unsigned int)(MAX_BLOCK_SIZE-1000), nBlockMaxSize)); - - // How much of the block should be dedicated to high-priority transactions, - // included regardless of the fees they pay - unsigned int nBlockPrioritySize = GetArg("-blockprioritysize", DEFAULT_BLOCK_PRIORITY_SIZE); - nBlockPrioritySize = std::min(nBlockMaxSize, nBlockPrioritySize); - - // Minimum block size you want to create; block will be filled with free transactions - // until there are no more or the block reaches this size: - unsigned int nBlockMinSize = GetArg("-blockminsize", 0); - nBlockMinSize = std::min(nBlockMaxSize, nBlockMinSize); - - // Collect memory pool transactions into the block - int64 nFees = 0; - { - LOCK2(cs_main, mempool.cs); - CBlockIndex* pindexPrev = pindexBest; - CCoinsViewCache view(*pcoinsTip, true); - - // Priority order to process transactions - list<COrphan> vOrphan; // list memory doesn't move - map<uint256, vector<COrphan*> > mapDependers; - bool fPrintPriority = GetBoolArg("-printpriority", false); - - // This vector will be sorted into a priority queue: - vector<TxPriority> vecPriority; - vecPriority.reserve(mempool.mapTx.size()); - for (map<uint256, CTransaction>::iterator mi = mempool.mapTx.begin(); mi != mempool.mapTx.end(); ++mi) - { - CTransaction& tx = (*mi).second; - if (tx.IsCoinBase() || !IsFinalTx(tx)) - continue; - - COrphan* porphan = NULL; - double dPriority = 0; - int64 nTotalIn = 0; - bool fMissingInputs = false; - BOOST_FOREACH(const CTxIn& txin, tx.vin) - { - // Read prev transaction - if (!view.HaveCoins(txin.prevout.hash)) - { - // This should never happen; all transactions in the memory - // pool should connect to either transactions in the chain - // or other transactions in the memory pool. - if (!mempool.mapTx.count(txin.prevout.hash)) - { - printf("ERROR: mempool transaction missing input\n"); - if (fDebug) assert("mempool transaction missing input" == 0); - fMissingInputs = true; - if (porphan) - vOrphan.pop_back(); - break; - } - - // Has to wait for dependencies - if (!porphan) - { - // Use list for automatic deletion - vOrphan.push_back(COrphan(&tx)); - porphan = &vOrphan.back(); - } - mapDependers[txin.prevout.hash].push_back(porphan); - porphan->setDependsOn.insert(txin.prevout.hash); - nTotalIn += mempool.mapTx[txin.prevout.hash].vout[txin.prevout.n].nValue; - continue; - } - const CCoins &coins = view.GetCoins(txin.prevout.hash); - - int64 nValueIn = coins.vout[txin.prevout.n].nValue; - nTotalIn += nValueIn; - - int nConf = pindexPrev->nHeight - coins.nHeight + 1; - - dPriority += (double)nValueIn * nConf; - } - if (fMissingInputs) continue; - - // Priority is sum(valuein * age) / txsize - unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION); - dPriority /= nTxSize; - - // This is a more accurate fee-per-kilobyte than is used by the client code, because the - // client code rounds up the size to the nearest 1K. That's good, because it gives an - // incentive to create smaller transactions. - double dFeePerKb = double(nTotalIn-GetValueOut(tx)) / (double(nTxSize)/1000.0); - - if (porphan) - { - porphan->dPriority = dPriority; - porphan->dFeePerKb = dFeePerKb; - } - else - vecPriority.push_back(TxPriority(dPriority, dFeePerKb, &(*mi).second)); - } - - // Collect transactions into block - uint64 nBlockSize = 1000; - uint64 nBlockTx = 0; - int nBlockSigOps = 100; - bool fSortedByFee = (nBlockPrioritySize <= 0); - - TxPriorityCompare comparer(fSortedByFee); - std::make_heap(vecPriority.begin(), vecPriority.end(), comparer); - - while (!vecPriority.empty()) - { - // Take highest priority transaction off the priority queue: - double dPriority = vecPriority.front().get<0>(); - double dFeePerKb = vecPriority.front().get<1>(); - CTransaction& tx = *(vecPriority.front().get<2>()); - - std::pop_heap(vecPriority.begin(), vecPriority.end(), comparer); - vecPriority.pop_back(); - - // Size limits - unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION); - if (nBlockSize + nTxSize >= nBlockMaxSize) - continue; - - // Legacy limits on sigOps: - unsigned int nTxSigOps = GetLegacySigOpCount(tx); - if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS) - continue; - - // Skip free transactions if we're past the minimum block size: - if (fSortedByFee && (dFeePerKb < CTransaction::nMinTxFee) && (nBlockSize + nTxSize >= nBlockMinSize)) - continue; - - // Prioritize by fee once past the priority size or we run out of high-priority - // transactions: - if (!fSortedByFee && - ((nBlockSize + nTxSize >= nBlockPrioritySize) || !AllowFree(dPriority))) - { - fSortedByFee = true; - comparer = TxPriorityCompare(fSortedByFee); - std::make_heap(vecPriority.begin(), vecPriority.end(), comparer); - } - - if (!view.HaveInputs(tx)) - continue; - - int64 nTxFees = view.GetValueIn(tx)-GetValueOut(tx); - - nTxSigOps += GetP2SHSigOpCount(tx, view); - if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS) - continue; - - CValidationState state; - if (!CheckInputs(tx, state, view, true, SCRIPT_VERIFY_P2SH)) - continue; - - CTxUndo txundo; - uint256 hash = tx.GetHash(); - UpdateCoins(tx, state, view, txundo, pindexPrev->nHeight+1, hash); - - // Added - pblock->vtx.push_back(tx); - pblocktemplate->vTxFees.push_back(nTxFees); - pblocktemplate->vTxSigOps.push_back(nTxSigOps); - nBlockSize += nTxSize; - ++nBlockTx; - nBlockSigOps += nTxSigOps; - nFees += nTxFees; - - if (fPrintPriority) - { - printf("priority %.1f feeperkb %.1f txid %s\n", - dPriority, dFeePerKb, tx.GetHash().ToString().c_str()); - } - - // Add transactions that depend on this one to the priority queue - if (mapDependers.count(hash)) - { - BOOST_FOREACH(COrphan* porphan, mapDependers[hash]) - { - if (!porphan->setDependsOn.empty()) - { - porphan->setDependsOn.erase(hash); - if (porphan->setDependsOn.empty()) - { - vecPriority.push_back(TxPriority(porphan->dPriority, porphan->dFeePerKb, porphan->ptx)); - std::push_heap(vecPriority.begin(), vecPriority.end(), comparer); - } - } - } - } - } - - nLastBlockTx = nBlockTx; - nLastBlockSize = nBlockSize; - printf("CreateNewBlock(): total size %"PRI64u"\n", nBlockSize); - - pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nHeight+1, nFees); - pblocktemplate->vTxFees[0] = -nFees; - - // Fill in header - pblock->hashPrevBlock = pindexPrev->GetBlockHash(); - UpdateTime(*pblock, pindexPrev); - pblock->nBits = GetNextWorkRequired(pindexPrev, pblock); - pblock->nNonce = 0; - pblock->vtx[0].vin[0].scriptSig = CScript() << OP_0 << OP_0; - pblocktemplate->vTxSigOps[0] = GetLegacySigOpCount(pblock->vtx[0]); - - CBlockIndex indexDummy(*pblock); - indexDummy.pprev = pindexPrev; - indexDummy.nHeight = pindexPrev->nHeight + 1; - CCoinsViewCache viewNew(*pcoinsTip, true); - CValidationState state; - if (!ConnectBlock(*pblock, state, &indexDummy, viewNew, true)) - throw std::runtime_error("CreateNewBlock() : ConnectBlock failed"); - } - - return pblocktemplate.release(); -} - - -void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce) -{ - // Update nExtraNonce - static uint256 hashPrevBlock; - if (hashPrevBlock != pblock->hashPrevBlock) - { - nExtraNonce = 0; - hashPrevBlock = pblock->hashPrevBlock; - } - ++nExtraNonce; - unsigned int nHeight = pindexPrev->nHeight+1; // Height first in coinbase required for block.version=2 - pblock->vtx[0].vin[0].scriptSig = (CScript() << nHeight << CBigNum(nExtraNonce)) + COINBASE_FLAGS; - assert(pblock->vtx[0].vin[0].scriptSig.size() <= 100); - - pblock->hashMerkleRoot = pblock->BuildMerkleTree(); -} - - -void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1) -{ - // - // Pre-build hash buffers - // - struct - { - struct unnamed2 - { - int nVersion; - uint256 hashPrevBlock; - uint256 hashMerkleRoot; - unsigned int nTime; - unsigned int nBits; - unsigned int nNonce; - } - block; - unsigned char pchPadding0[64]; - uint256 hash1; - unsigned char pchPadding1[64]; - } - tmp; - memset(&tmp, 0, sizeof(tmp)); - - tmp.block.nVersion = pblock->nVersion; - tmp.block.hashPrevBlock = pblock->hashPrevBlock; - tmp.block.hashMerkleRoot = pblock->hashMerkleRoot; - tmp.block.nTime = pblock->nTime; - tmp.block.nBits = pblock->nBits; - tmp.block.nNonce = pblock->nNonce; - - FormatHashBlocks(&tmp.block, sizeof(tmp.block)); - FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1)); - - // Byte swap all the input buffer - for (unsigned int i = 0; i < sizeof(tmp)/4; i++) - ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]); - - // Precalc the first half of the first hash, which stays constant - SHA256Transform(pmidstate, &tmp.block, pSHA256InitState); - - memcpy(pdata, &tmp.block, 128); - memcpy(phash1, &tmp.hash1, 64); -} - - -bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey) -{ - uint256 hash = pblock->GetHash(); - uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256(); - - if (hash > hashTarget) - return false; - - //// debug print - printf("BitcoinMiner:\n"); - printf("proof-of-work found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str()); - pblock->print(); - printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str()); - - // Found a solution - { - LOCK(cs_main); - if (pblock->hashPrevBlock != hashBestChain) - return error("BitcoinMiner : generated block is stale"); - - // Remove key from key pool - reservekey.KeepKey(); - - // Track how many getdata requests this block gets - { - LOCK(wallet.cs_wallet); - wallet.mapRequestCount[pblock->GetHash()] = 0; - } - - // Process this block the same as if we had received it from another node - CValidationState state; - if (!ProcessBlock(state, NULL, pblock)) - return error("BitcoinMiner : ProcessBlock, block not accepted"); - } - - return true; -} - -void static BitcoinMiner(CWallet *pwallet) -{ - printf("BitcoinMiner started\n"); - SetThreadPriority(THREAD_PRIORITY_LOWEST); - RenameThread("bitcoin-miner"); - - // Each thread has its own key and counter - CReserveKey reservekey(pwallet); - unsigned int nExtraNonce = 0; - - try { loop { - if (Params().NetworkID() != CChainParams::REGTEST) { - // Busy-wait for the network to come online so we don't waste time mining - // on an obsolete chain. In regtest mode we expect to fly solo. - while (vNodes.empty()) - MilliSleep(1000); - } - - // - // Create new block - // - unsigned int nTransactionsUpdatedLast = nTransactionsUpdated; - CBlockIndex* pindexPrev = pindexBest; - - auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(reservekey)); - if (!pblocktemplate.get()) - return; - CBlock *pblock = &pblocktemplate->block; - IncrementExtraNonce(pblock, pindexPrev, nExtraNonce); - - printf("Running BitcoinMiner with %"PRIszu" transactions in block (%u bytes)\n", pblock->vtx.size(), - ::GetSerializeSize(*pblock, SER_NETWORK, PROTOCOL_VERSION)); - - // - // Pre-build hash buffers - // - char pmidstatebuf[32+16]; char* pmidstate = alignup<16>(pmidstatebuf); - char pdatabuf[128+16]; char* pdata = alignup<16>(pdatabuf); - char phash1buf[64+16]; char* phash1 = alignup<16>(phash1buf); - - FormatHashBuffers(pblock, pmidstate, pdata, phash1); - - unsigned int& nBlockTime = *(unsigned int*)(pdata + 64 + 4); - unsigned int& nBlockBits = *(unsigned int*)(pdata + 64 + 8); - unsigned int& nBlockNonce = *(unsigned int*)(pdata + 64 + 12); - - - // - // Search - // - int64 nStart = GetTime(); - uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256(); - uint256 hashbuf[2]; - uint256& hash = *alignup<16>(hashbuf); - loop - { - unsigned int nHashesDone = 0; - unsigned int nNonceFound; - - // Crypto++ SHA256 - nNonceFound = ScanHash_CryptoPP(pmidstate, pdata + 64, phash1, - (char*)&hash, nHashesDone); - - // Check if something found - if (nNonceFound != (unsigned int) -1) - { - for (unsigned int i = 0; i < sizeof(hash)/4; i++) - ((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]); - - if (hash <= hashTarget) - { - // Found a solution - pblock->nNonce = ByteReverse(nNonceFound); - assert(hash == pblock->GetHash()); - - SetThreadPriority(THREAD_PRIORITY_NORMAL); - CheckWork(pblock, *pwalletMain, reservekey); - SetThreadPriority(THREAD_PRIORITY_LOWEST); - - // In regression test mode, stop mining after a block is found. This - // allows developers to controllably generate a block on demand. - if (Params().NetworkID() == CChainParams::REGTEST) - throw boost::thread_interrupted(); - - break; - } - } - - // Meter hashes/sec - static int64 nHashCounter; - if (nHPSTimerStart == 0) - { - nHPSTimerStart = GetTimeMillis(); - nHashCounter = 0; - } - else - nHashCounter += nHashesDone; - if (GetTimeMillis() - nHPSTimerStart > 4000) - { - static CCriticalSection cs; - { - LOCK(cs); - if (GetTimeMillis() - nHPSTimerStart > 4000) - { - dHashesPerSec = 1000.0 * nHashCounter / (GetTimeMillis() - nHPSTimerStart); - nHPSTimerStart = GetTimeMillis(); - nHashCounter = 0; - static int64 nLogTime; - if (GetTime() - nLogTime > 30 * 60) - { - nLogTime = GetTime(); - printf("hashmeter %6.0f khash/s\n", dHashesPerSec/1000.0); - } - } - } - } - - // Check for stop or if block needs to be rebuilt - boost::this_thread::interruption_point(); - if (vNodes.empty() && Params().NetworkID() != CChainParams::REGTEST) - break; - if (nBlockNonce >= 0xffff0000) - break; - if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60) - break; - if (pindexPrev != pindexBest) - break; - - // Update nTime every few seconds - UpdateTime(*pblock, pindexPrev); - nBlockTime = ByteReverse(pblock->nTime); - if (TestNet()) - { - // Changing pblock->nTime can change work required on testnet: - nBlockBits = ByteReverse(pblock->nBits); - hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256(); - } - } - } } - catch (boost::thread_interrupted) - { - printf("BitcoinMiner terminated\n"); - throw; - } -} - -void GenerateBitcoins(bool fGenerate, CWallet* pwallet) -{ - static boost::thread_group* minerThreads = NULL; - - int nThreads = GetArg("-genproclimit", -1); - if (nThreads < 0) { - if (Params().NetworkID() == CChainParams::REGTEST) - nThreads = 1; - else - nThreads = boost::thread::hardware_concurrency(); - } - - if (minerThreads != NULL) - { - minerThreads->interrupt_all(); - delete minerThreads; - minerThreads = NULL; - } - - if (nThreads == 0 || !fGenerate) - return; - - minerThreads = new boost::thread_group(); - for (int i = 0; i < nThreads; i++) - minerThreads->create_thread(boost::bind(&BitcoinMiner, pwallet)); -} - - - class CMainCleanup { public: |