1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
9 #include "cryptopp/sha.h"
10 #include <boost/filesystem.hpp>
11 #include <boost/filesystem/fstream.hpp>
14 using namespace boost;
20 CCriticalSection cs_setpwalletRegistered;
21 set<CWallet*> setpwalletRegistered;
23 CCriticalSection cs_main;
25 static map<uint256, CTransaction> mapTransactions;
26 CCriticalSection cs_mapTransactions;
27 unsigned int nTransactionsUpdated = 0;
28 map<COutPoint, CInPoint> mapNextTx;
30 map<uint256, CBlockIndex*> mapBlockIndex;
31 uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
32 static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
33 const int nTotalBlocksEstimate = 140700; // Conservative estimate of total nr of blocks on main chain
34 const int nInitialBlockThreshold = 120; // Regard blocks up until N-threshold as "initial download"
35 CBlockIndex* pindexGenesisBlock = NULL;
37 CBigNum bnBestChainWork = 0;
38 CBigNum bnBestInvalidWork = 0;
39 uint256 hashBestChain = 0;
40 CBlockIndex* pindexBest = NULL;
41 int64 nTimeBestReceived = 0;
43 map<uint256, CBlock*> mapOrphanBlocks;
44 multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
46 map<uint256, CDataStream*> mapOrphanTransactions;
47 multimap<uint256, CDataStream*> mapOrphanTransactionsByPrev;
54 int fGenerateBitcoins = false;
55 int64 nTransactionFee = 0;
56 int fLimitProcessors = false;
57 int nLimitProcessors = 1;
58 int fMinimizeToTray = true;
59 int fMinimizeOnClose = true;
72 //////////////////////////////////////////////////////////////////////////////
74 // dispatching functions
77 void RegisterWallet(CWallet* pwalletIn)
79 CRITICAL_BLOCK(cs_setpwalletRegistered)
81 setpwalletRegistered.insert(pwalletIn);
85 void UnregisterWallet(CWallet* pwalletIn)
87 CRITICAL_BLOCK(cs_setpwalletRegistered)
89 setpwalletRegistered.erase(pwalletIn);
93 bool static IsFromMe(CTransaction& tx)
95 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
96 if (pwallet->IsFromMe(tx))
101 bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
103 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
104 if (pwallet->GetTransaction(hashTx,wtx))
109 void static EraseFromWallets(uint256 hash)
111 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
112 pwallet->EraseFromWallet(hash);
115 void static SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL, bool fUpdate = false)
117 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
118 pwallet->AddToWalletIfInvolvingMe(tx, pblock, fUpdate);
121 void static SetBestChain(const CBlockLocator& loc)
123 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
124 pwallet->SetBestChain(loc);
127 void static UpdatedTransaction(const uint256& hashTx)
129 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
130 pwallet->UpdatedTransaction(hashTx);
133 void static PrintWallets(const CBlock& block)
135 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
136 pwallet->PrintWallet(block);
139 void static Inventory(const uint256& hash)
141 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
142 pwallet->Inventory(hash);
145 void static ResendWalletTransactions()
147 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
148 pwallet->ResendWalletTransactions();
157 //////////////////////////////////////////////////////////////////////////////
159 // mapOrphanTransactions
162 void static AddOrphanTx(const CDataStream& vMsg)
165 CDataStream(vMsg) >> tx;
166 uint256 hash = tx.GetHash();
167 if (mapOrphanTransactions.count(hash))
169 CDataStream* pvMsg = mapOrphanTransactions[hash] = new CDataStream(vMsg);
170 BOOST_FOREACH(const CTxIn& txin, tx.vin)
171 mapOrphanTransactionsByPrev.insert(make_pair(txin.prevout.hash, pvMsg));
174 void static EraseOrphanTx(uint256 hash)
176 if (!mapOrphanTransactions.count(hash))
178 const CDataStream* pvMsg = mapOrphanTransactions[hash];
180 CDataStream(*pvMsg) >> tx;
181 BOOST_FOREACH(const CTxIn& txin, tx.vin)
183 for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(txin.prevout.hash);
184 mi != mapOrphanTransactionsByPrev.upper_bound(txin.prevout.hash);)
186 if ((*mi).second == pvMsg)
187 mapOrphanTransactionsByPrev.erase(mi++);
193 mapOrphanTransactions.erase(hash);
203 //////////////////////////////////////////////////////////////////////////////
205 // CTransaction and CTxIndex
208 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout, CTxIndex& txindexRet)
211 if (!txdb.ReadTxIndex(prevout.hash, txindexRet))
213 if (!ReadFromDisk(txindexRet.pos))
215 if (prevout.n >= vout.size())
223 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout)
226 return ReadFromDisk(txdb, prevout, txindex);
229 bool CTransaction::ReadFromDisk(COutPoint prevout)
233 return ReadFromDisk(txdb, prevout, txindex);
238 int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
250 // Load the block this tx is in
252 if (!CTxDB("r").ReadTxIndex(GetHash(), txindex))
254 if (!blockTmp.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos))
259 // Update the tx's hashBlock
260 hashBlock = pblock->GetHash();
262 // Locate the transaction
263 for (nIndex = 0; nIndex < pblock->vtx.size(); nIndex++)
264 if (pblock->vtx[nIndex] == *(CTransaction*)this)
266 if (nIndex == pblock->vtx.size())
268 vMerkleBranch.clear();
270 printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
274 // Fill in merkle branch
275 vMerkleBranch = pblock->GetMerkleBranch(nIndex);
278 // Is the tx in a block that's in the main chain
279 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
280 if (mi == mapBlockIndex.end())
282 CBlockIndex* pindex = (*mi).second;
283 if (!pindex || !pindex->IsInMainChain())
286 return pindexBest->nHeight - pindex->nHeight + 1;
295 bool CTransaction::CheckTransaction() const
297 // Basic checks that don't depend on any context
299 return error("CTransaction::CheckTransaction() : vin empty");
301 return error("CTransaction::CheckTransaction() : vout empty");
303 if (::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
304 return error("CTransaction::CheckTransaction() : size limits failed");
306 // Check for negative or overflow output values
308 BOOST_FOREACH(const CTxOut& txout, vout)
310 if (txout.nValue < 0)
311 return error("CTransaction::CheckTransaction() : txout.nValue negative");
312 if (txout.nValue > MAX_MONEY)
313 return error("CTransaction::CheckTransaction() : txout.nValue too high");
314 nValueOut += txout.nValue;
315 if (!MoneyRange(nValueOut))
316 return error("CTransaction::CheckTransaction() : txout total out of range");
319 // Check for duplicate inputs
320 set<COutPoint> vInOutPoints;
321 BOOST_FOREACH(const CTxIn& txin, vin)
323 if (vInOutPoints.count(txin.prevout))
325 vInOutPoints.insert(txin.prevout);
330 if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
331 return error("CTransaction::CheckTransaction() : coinbase script size");
335 BOOST_FOREACH(const CTxIn& txin, vin)
336 if (txin.prevout.IsNull())
337 return error("CTransaction::CheckTransaction() : prevout is null");
343 bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMissingInputs)
346 *pfMissingInputs = false;
348 if (!CheckTransaction())
349 return error("AcceptToMemoryPool() : CheckTransaction failed");
351 // Coinbase is only valid in a block, not as a loose transaction
353 return error("AcceptToMemoryPool() : coinbase as individual tx");
355 // To help v0.1.5 clients who would see it as a negative number
356 if ((int64)nLockTime > INT_MAX)
357 return error("AcceptToMemoryPool() : not accepting nLockTime beyond 2038 yet");
360 unsigned int nSize = ::GetSerializeSize(*this, SER_NETWORK);
361 // Checking ECDSA signatures is a CPU bottleneck, so to avoid denial-of-service
362 // attacks disallow transactions with more than one SigOp per 34 bytes.
363 // 34 bytes because a TxOut is:
364 // 20-byte address + 8 byte bitcoin amount + 5 bytes of ops + 1 byte script length
365 if (GetSigOpCount() > nSize / 34 || nSize < 100)
366 return error("AcceptToMemoryPool() : nonstandard transaction");
368 // Rather not work on nonstandard transactions (unless -testnet)
369 if (!fTestNet && !IsStandard())
370 return error("AcceptToMemoryPool() : nonstandard transaction type");
372 // Do we already have it?
373 uint256 hash = GetHash();
374 CRITICAL_BLOCK(cs_mapTransactions)
375 if (mapTransactions.count(hash))
378 if (txdb.ContainsTx(hash))
381 // Check for conflicts with in-memory transactions
382 CTransaction* ptxOld = NULL;
383 for (int i = 0; i < vin.size(); i++)
385 COutPoint outpoint = vin[i].prevout;
386 if (mapNextTx.count(outpoint))
388 // Disable replacement feature for now
391 // Allow replacing with a newer version of the same transaction
394 ptxOld = mapNextTx[outpoint].ptx;
395 if (ptxOld->IsFinal())
397 if (!IsNewerThan(*ptxOld))
399 for (int i = 0; i < vin.size(); i++)
401 COutPoint outpoint = vin[i].prevout;
402 if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
411 // Check against previous transactions
412 map<uint256, CTxIndex> mapUnused;
414 if (!ConnectInputs(txdb, mapUnused, CDiskTxPos(1,1,1), pindexBest, nFees, false, false))
417 *pfMissingInputs = true;
418 return error("AcceptToMemoryPool() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
421 // Don't accept it if it can't get into a block
422 if (nFees < GetMinFee(1000, true, true))
423 return error("AcceptToMemoryPool() : not enough fees");
425 // Continuously rate-limit free transactions
426 // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
427 // be annoying or make other's transactions take longer to confirm.
428 if (nFees < MIN_RELAY_TX_FEE)
430 static CCriticalSection cs;
431 static double dFreeCount;
432 static int64 nLastTime;
433 int64 nNow = GetTime();
437 // Use an exponentially decaying ~10-minute window:
438 dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
440 // -limitfreerelay unit is thousand-bytes-per-minute
441 // At default rate it would take over a month to fill 1GB
442 if (dFreeCount > GetArg("-limitfreerelay", 15)*10*1000 && !IsFromMe(*this))
443 return error("AcceptToMemoryPool() : free transaction rejected by rate limiter");
445 printf("Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
451 // Store transaction in memory
452 CRITICAL_BLOCK(cs_mapTransactions)
456 printf("AcceptToMemoryPool() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
457 ptxOld->RemoveFromMemoryPool();
459 AddToMemoryPoolUnchecked();
462 ///// are we sure this is ok when loading transactions or restoring block txes
463 // If updated, erase old tx from wallet
465 EraseFromWallets(ptxOld->GetHash());
467 printf("AcceptToMemoryPool(): accepted %s\n", hash.ToString().substr(0,10).c_str());
471 bool CTransaction::AcceptToMemoryPool(bool fCheckInputs, bool* pfMissingInputs)
474 return AcceptToMemoryPool(txdb, fCheckInputs, pfMissingInputs);
477 bool CTransaction::AddToMemoryPoolUnchecked()
479 // Add to memory pool without checking anything. Don't call this directly,
480 // call AcceptToMemoryPool to properly check the transaction first.
481 CRITICAL_BLOCK(cs_mapTransactions)
483 uint256 hash = GetHash();
484 mapTransactions[hash] = *this;
485 for (int i = 0; i < vin.size(); i++)
486 mapNextTx[vin[i].prevout] = CInPoint(&mapTransactions[hash], i);
487 nTransactionsUpdated++;
493 bool CTransaction::RemoveFromMemoryPool()
495 // Remove transaction from memory pool
496 CRITICAL_BLOCK(cs_mapTransactions)
498 BOOST_FOREACH(const CTxIn& txin, vin)
499 mapNextTx.erase(txin.prevout);
500 mapTransactions.erase(GetHash());
501 nTransactionsUpdated++;
511 int CMerkleTx::GetDepthInMainChain(int& nHeightRet) const
513 if (hashBlock == 0 || nIndex == -1)
516 // Find the block it claims to be in
517 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
518 if (mi == mapBlockIndex.end())
520 CBlockIndex* pindex = (*mi).second;
521 if (!pindex || !pindex->IsInMainChain())
524 // Make sure the merkle branch connects to this block
525 if (!fMerkleVerified)
527 if (CBlock::CheckMerkleBranch(GetHash(), vMerkleBranch, nIndex) != pindex->hashMerkleRoot)
529 fMerkleVerified = true;
532 nHeightRet = pindex->nHeight;
533 return pindexBest->nHeight - pindex->nHeight + 1;
537 int CMerkleTx::GetBlocksToMaturity() const
541 return max(0, (COINBASE_MATURITY+20) - GetDepthInMainChain());
545 bool CMerkleTx::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs)
549 if (!IsInMainChain() && !ClientConnectInputs())
551 return CTransaction::AcceptToMemoryPool(txdb, false);
555 return CTransaction::AcceptToMemoryPool(txdb, fCheckInputs);
559 bool CMerkleTx::AcceptToMemoryPool()
562 return AcceptToMemoryPool(txdb);
567 bool CWalletTx::AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs)
569 CRITICAL_BLOCK(cs_mapTransactions)
571 // Add previous supporting transactions first
572 BOOST_FOREACH(CMerkleTx& tx, vtxPrev)
574 if (!tx.IsCoinBase())
576 uint256 hash = tx.GetHash();
577 if (!mapTransactions.count(hash) && !txdb.ContainsTx(hash))
578 tx.AcceptToMemoryPool(txdb, fCheckInputs);
581 return AcceptToMemoryPool(txdb, fCheckInputs);
586 bool CWalletTx::AcceptWalletTransaction()
589 return AcceptWalletTransaction(txdb);
592 int CTxIndex::GetDepthInMainChain() const
596 if (!block.ReadFromDisk(pos.nFile, pos.nBlockPos, false))
598 // Find the block in the index
599 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(block.GetHash());
600 if (mi == mapBlockIndex.end())
602 CBlockIndex* pindex = (*mi).second;
603 if (!pindex || !pindex->IsInMainChain())
605 return 1 + nBestHeight - pindex->nHeight;
617 //////////////////////////////////////////////////////////////////////////////
619 // CBlock and CBlockIndex
622 bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
624 if (!fReadTransactions)
626 *this = pindex->GetBlockHeader();
629 if (!ReadFromDisk(pindex->nFile, pindex->nBlockPos, fReadTransactions))
631 if (GetHash() != pindex->GetBlockHash())
632 return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
636 uint256 static GetOrphanRoot(const CBlock* pblock)
638 // Work back to the first block in the orphan chain
639 while (mapOrphanBlocks.count(pblock->hashPrevBlock))
640 pblock = mapOrphanBlocks[pblock->hashPrevBlock];
641 return pblock->GetHash();
644 int64 static GetBlockValue(int nHeight, int64 nFees)
646 int64 nSubsidy = 50 * COIN;
648 // Subsidy is cut in half every 4 years
649 nSubsidy >>= (nHeight / 210000);
651 return nSubsidy + nFees;
654 unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast)
656 const int64 nTargetTimespan = 14 * 24 * 60 * 60; // two weeks
657 const int64 nTargetSpacing = 10 * 60;
658 const int64 nInterval = nTargetTimespan / nTargetSpacing;
661 if (pindexLast == NULL)
662 return bnProofOfWorkLimit.GetCompact();
664 // Only change once per interval
665 if ((pindexLast->nHeight+1) % nInterval != 0)
666 return pindexLast->nBits;
668 // Go back by what we want to be 14 days worth of blocks
669 const CBlockIndex* pindexFirst = pindexLast;
670 for (int i = 0; pindexFirst && i < nInterval-1; i++)
671 pindexFirst = pindexFirst->pprev;
674 // Limit adjustment step
675 int64 nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime();
676 printf(" nActualTimespan = %"PRI64d" before bounds\n", nActualTimespan);
677 if (nActualTimespan < nTargetTimespan/4)
678 nActualTimespan = nTargetTimespan/4;
679 if (nActualTimespan > nTargetTimespan*4)
680 nActualTimespan = nTargetTimespan*4;
684 bnNew.SetCompact(pindexLast->nBits);
685 bnNew *= nActualTimespan;
686 bnNew /= nTargetTimespan;
688 if (bnNew > bnProofOfWorkLimit)
689 bnNew = bnProofOfWorkLimit;
692 printf("GetNextWorkRequired RETARGET\n");
693 printf("nTargetTimespan = %"PRI64d" nActualTimespan = %"PRI64d"\n", nTargetTimespan, nActualTimespan);
694 printf("Before: %08x %s\n", pindexLast->nBits, CBigNum().SetCompact(pindexLast->nBits).getuint256().ToString().c_str());
695 printf("After: %08x %s\n", bnNew.GetCompact(), bnNew.getuint256().ToString().c_str());
697 return bnNew.GetCompact();
700 bool CheckProofOfWork(uint256 hash, unsigned int nBits)
703 bnTarget.SetCompact(nBits);
706 if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
707 return error("CheckProofOfWork() : nBits below minimum work");
709 // Check proof of work matches claimed amount
710 if (hash > bnTarget.getuint256())
711 return error("CheckProofOfWork() : hash doesn't match nBits");
716 // Return conservative estimate of total number of blocks, 0 if unknown
717 int GetTotalBlocksEstimate()
725 return nTotalBlocksEstimate;
729 bool IsInitialBlockDownload()
731 if (pindexBest == NULL || nBestHeight < (GetTotalBlocksEstimate()-nInitialBlockThreshold))
733 static int64 nLastUpdate;
734 static CBlockIndex* pindexLastBest;
735 if (pindexBest != pindexLastBest)
737 pindexLastBest = pindexBest;
738 nLastUpdate = GetTime();
740 return (GetTime() - nLastUpdate < 10 &&
741 pindexBest->GetBlockTime() < GetTime() - 24 * 60 * 60);
744 void static InvalidChainFound(CBlockIndex* pindexNew)
746 if (pindexNew->bnChainWork > bnBestInvalidWork)
748 bnBestInvalidWork = pindexNew->bnChainWork;
749 CTxDB().WriteBestInvalidWork(bnBestInvalidWork);
752 printf("InvalidChainFound: invalid block=%s height=%d work=%s\n", pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight, pindexNew->bnChainWork.ToString().c_str());
753 printf("InvalidChainFound: current best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
754 if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
755 printf("InvalidChainFound: WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.\n");
768 bool CTransaction::DisconnectInputs(CTxDB& txdb)
770 // Relinquish previous transactions' spent pointers
773 BOOST_FOREACH(const CTxIn& txin, vin)
775 COutPoint prevout = txin.prevout;
777 // Get prev txindex from disk
779 if (!txdb.ReadTxIndex(prevout.hash, txindex))
780 return error("DisconnectInputs() : ReadTxIndex failed");
782 if (prevout.n >= txindex.vSpent.size())
783 return error("DisconnectInputs() : prevout.n out of range");
785 // Mark outpoint as not spent
786 txindex.vSpent[prevout.n].SetNull();
789 if (!txdb.UpdateTxIndex(prevout.hash, txindex))
790 return error("DisconnectInputs() : UpdateTxIndex failed");
794 // Remove transaction from index
795 // This can fail if a duplicate of this transaction was in a chain that got
796 // reorganized away. This is only possible if this transaction was completely
797 // spent, so erasing it would be a no-op anway.
798 txdb.EraseTxIndex(*this);
804 bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx,
805 CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee)
807 // Take over previous transactions' spent pointers
811 for (int i = 0; i < vin.size(); i++)
813 COutPoint prevout = vin[i].prevout;
818 if ((fBlock || fMiner) && mapTestPool.count(prevout.hash))
820 // Get txindex from current proposed changes
821 txindex = mapTestPool[prevout.hash];
825 // Read txindex from txdb
826 fFound = txdb.ReadTxIndex(prevout.hash, txindex);
828 if (!fFound && (fBlock || fMiner))
829 return fMiner ? false : error("ConnectInputs() : %s prev tx %s index entry not found", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
833 if (!fFound || txindex.pos == CDiskTxPos(1,1,1))
835 // Get prev tx from single transactions in memory
836 CRITICAL_BLOCK(cs_mapTransactions)
838 if (!mapTransactions.count(prevout.hash))
839 return error("ConnectInputs() : %s mapTransactions prev not found %s", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
840 txPrev = mapTransactions[prevout.hash];
843 txindex.vSpent.resize(txPrev.vout.size());
847 // Get prev tx from disk
848 if (!txPrev.ReadFromDisk(txindex.pos))
849 return error("ConnectInputs() : %s ReadFromDisk prev tx %s failed", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
852 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
853 return error("ConnectInputs() : %s prevout.n out of range %d %d %d prev tx %s\n%s", GetHash().ToString().substr(0,10).c_str(), prevout.n, txPrev.vout.size(), txindex.vSpent.size(), prevout.hash.ToString().substr(0,10).c_str(), txPrev.ToString().c_str());
855 // If prev is coinbase, check that it's matured
856 if (txPrev.IsCoinBase())
857 for (CBlockIndex* pindex = pindexBlock; pindex && pindexBlock->nHeight - pindex->nHeight < COINBASE_MATURITY; pindex = pindex->pprev)
858 if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
859 return error("ConnectInputs() : tried to spend coinbase at depth %d", pindexBlock->nHeight - pindex->nHeight);
862 if (!VerifySignature(txPrev, *this, i))
863 return error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str());
865 // Check for conflicts
866 if (!txindex.vSpent[prevout.n].IsNull())
867 return fMiner ? false : error("ConnectInputs() : %s prev tx already used at %s", GetHash().ToString().substr(0,10).c_str(), txindex.vSpent[prevout.n].ToString().c_str());
869 // Check for negative or overflow input values
870 nValueIn += txPrev.vout[prevout.n].nValue;
871 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
872 return error("ConnectInputs() : txin values out of range");
874 // Mark outpoints as spent
875 txindex.vSpent[prevout.n] = posThisTx;
878 if (fBlock || fMiner)
880 mapTestPool[prevout.hash] = txindex;
884 if (nValueIn < GetValueOut())
885 return error("ConnectInputs() : %s value in < value out", GetHash().ToString().substr(0,10).c_str());
887 // Tally transaction fees
888 int64 nTxFee = nValueIn - GetValueOut();
890 return error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str());
891 if (nTxFee < nMinFee)
894 if (!MoneyRange(nFees))
895 return error("ConnectInputs() : nFees out of range");
900 // Add transaction to changes
901 mapTestPool[GetHash()] = CTxIndex(posThisTx, vout.size());
905 // Add transaction to test pool
906 mapTestPool[GetHash()] = CTxIndex(CDiskTxPos(1,1,1), vout.size());
913 bool CTransaction::ClientConnectInputs()
918 // Take over previous transactions' spent pointers
919 CRITICAL_BLOCK(cs_mapTransactions)
922 for (int i = 0; i < vin.size(); i++)
924 // Get prev tx from single transactions in memory
925 COutPoint prevout = vin[i].prevout;
926 if (!mapTransactions.count(prevout.hash))
928 CTransaction& txPrev = mapTransactions[prevout.hash];
930 if (prevout.n >= txPrev.vout.size())
934 if (!VerifySignature(txPrev, *this, i))
935 return error("ConnectInputs() : VerifySignature failed");
937 ///// this is redundant with the mapNextTx stuff, not sure which I want to get rid of
938 ///// this has to go away now that posNext is gone
939 // // Check for conflicts
940 // if (!txPrev.vout[prevout.n].posNext.IsNull())
941 // return error("ConnectInputs() : prev tx already used");
943 // // Flag outpoints as used
944 // txPrev.vout[prevout.n].posNext = posThisTx;
946 nValueIn += txPrev.vout[prevout.n].nValue;
948 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
949 return error("ClientConnectInputs() : txin values out of range");
951 if (GetValueOut() > nValueIn)
961 bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
963 // Disconnect in reverse order
964 for (int i = vtx.size()-1; i >= 0; i--)
965 if (!vtx[i].DisconnectInputs(txdb))
968 // Update block index on disk without changing it in memory.
969 // The memory index structure will be changed after the db commits.
972 CDiskBlockIndex blockindexPrev(pindex->pprev);
973 blockindexPrev.hashNext = 0;
974 if (!txdb.WriteBlockIndex(blockindexPrev))
975 return error("DisconnectBlock() : WriteBlockIndex failed");
981 bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
983 // Check it again in case a previous version let a bad block in
987 // Do not allow blocks that contain transactions which 'overwrite' older transactions,
988 // unless those are already completely spent.
989 // If such overwrites are allowed, coinbases and transactions depending upon those
990 // can be duplicated to remove the ability to spend the first instance -- even after
991 // being sent to another address.
992 // See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
993 // This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
994 // already refuses previously-known transaction id's entirely.
995 // This rule applies to all blocks whose timestamp is after March 15, 2012, 0:00 UTC.
996 // On testnet it is enabled as of februari 20, 2012, 0:00 UTC.
997 if (pindex->nTime > 1331769600 || (fTestNet && pindex->nTime > 1329696000))
998 BOOST_FOREACH(CTransaction& tx, vtx)
1000 CTxIndex txindexOld;
1001 if (txdb.ReadTxIndex(tx.GetHash(), txindexOld))
1002 BOOST_FOREACH(CDiskTxPos &pos, txindexOld.vSpent)
1007 //// issue here: it doesn't know the version
1008 unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - 1 + GetSizeOfCompactSize(vtx.size());
1010 map<uint256, CTxIndex> mapQueuedChanges;
1012 BOOST_FOREACH(CTransaction& tx, vtx)
1014 CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
1015 nTxPos += ::GetSerializeSize(tx, SER_DISK);
1017 if (!tx.ConnectInputs(txdb, mapQueuedChanges, posThisTx, pindex, nFees, true, false))
1020 // Write queued txindex changes
1021 for (map<uint256, CTxIndex>::iterator mi = mapQueuedChanges.begin(); mi != mapQueuedChanges.end(); ++mi)
1023 if (!txdb.UpdateTxIndex((*mi).first, (*mi).second))
1024 return error("ConnectBlock() : UpdateTxIndex failed");
1027 if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
1030 // Update block index on disk without changing it in memory.
1031 // The memory index structure will be changed after the db commits.
1034 CDiskBlockIndex blockindexPrev(pindex->pprev);
1035 blockindexPrev.hashNext = pindex->GetBlockHash();
1036 if (!txdb.WriteBlockIndex(blockindexPrev))
1037 return error("ConnectBlock() : WriteBlockIndex failed");
1040 // Watch for transactions paying to me
1041 BOOST_FOREACH(CTransaction& tx, vtx)
1042 SyncWithWallets(tx, this, true);
1047 bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
1049 printf("REORGANIZE\n");
1052 CBlockIndex* pfork = pindexBest;
1053 CBlockIndex* plonger = pindexNew;
1054 while (pfork != plonger)
1056 while (plonger->nHeight > pfork->nHeight)
1057 if (!(plonger = plonger->pprev))
1058 return error("Reorganize() : plonger->pprev is null");
1059 if (pfork == plonger)
1061 if (!(pfork = pfork->pprev))
1062 return error("Reorganize() : pfork->pprev is null");
1065 // List of what to disconnect
1066 vector<CBlockIndex*> vDisconnect;
1067 for (CBlockIndex* pindex = pindexBest; pindex != pfork; pindex = pindex->pprev)
1068 vDisconnect.push_back(pindex);
1070 // List of what to connect
1071 vector<CBlockIndex*> vConnect;
1072 for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
1073 vConnect.push_back(pindex);
1074 reverse(vConnect.begin(), vConnect.end());
1076 // Disconnect shorter branch
1077 vector<CTransaction> vResurrect;
1078 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
1081 if (!block.ReadFromDisk(pindex))
1082 return error("Reorganize() : ReadFromDisk for disconnect failed");
1083 if (!block.DisconnectBlock(txdb, pindex))
1084 return error("Reorganize() : DisconnectBlock failed");
1086 // Queue memory transactions to resurrect
1087 BOOST_FOREACH(const CTransaction& tx, block.vtx)
1088 if (!tx.IsCoinBase())
1089 vResurrect.push_back(tx);
1092 // Connect longer branch
1093 vector<CTransaction> vDelete;
1094 for (int i = 0; i < vConnect.size(); i++)
1096 CBlockIndex* pindex = vConnect[i];
1098 if (!block.ReadFromDisk(pindex))
1099 return error("Reorganize() : ReadFromDisk for connect failed");
1100 if (!block.ConnectBlock(txdb, pindex))
1104 return error("Reorganize() : ConnectBlock failed");
1107 // Queue memory transactions to delete
1108 BOOST_FOREACH(const CTransaction& tx, block.vtx)
1109 vDelete.push_back(tx);
1111 if (!txdb.WriteHashBestChain(pindexNew->GetBlockHash()))
1112 return error("Reorganize() : WriteHashBestChain failed");
1114 // Make sure it's successfully written to disk before changing memory structure
1115 if (!txdb.TxnCommit())
1116 return error("Reorganize() : TxnCommit failed");
1118 // Disconnect shorter branch
1119 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
1121 pindex->pprev->pnext = NULL;
1123 // Connect longer branch
1124 BOOST_FOREACH(CBlockIndex* pindex, vConnect)
1126 pindex->pprev->pnext = pindex;
1128 // Resurrect memory transactions that were in the disconnected branch
1129 BOOST_FOREACH(CTransaction& tx, vResurrect)
1130 tx.AcceptToMemoryPool(txdb, false);
1132 // Delete redundant memory transactions that are in the connected branch
1133 BOOST_FOREACH(CTransaction& tx, vDelete)
1134 tx.RemoveFromMemoryPool();
1140 bool CBlock::SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew)
1142 uint256 hash = GetHash();
1145 if (pindexGenesisBlock == NULL && hash == hashGenesisBlock)
1147 txdb.WriteHashBestChain(hash);
1148 if (!txdb.TxnCommit())
1149 return error("SetBestChain() : TxnCommit failed");
1150 pindexGenesisBlock = pindexNew;
1152 else if (hashPrevBlock == hashBestChain)
1154 // Adding to current best branch
1155 if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
1158 InvalidChainFound(pindexNew);
1159 return error("SetBestChain() : ConnectBlock failed");
1161 if (!txdb.TxnCommit())
1162 return error("SetBestChain() : TxnCommit failed");
1164 // Add to current best branch
1165 pindexNew->pprev->pnext = pindexNew;
1167 // Delete redundant memory transactions
1168 BOOST_FOREACH(CTransaction& tx, vtx)
1169 tx.RemoveFromMemoryPool();
1174 if (!Reorganize(txdb, pindexNew))
1177 InvalidChainFound(pindexNew);
1178 return error("SetBestChain() : Reorganize failed");
1182 // Update best block in wallet (so we can detect restored wallets)
1183 if (!IsInitialBlockDownload())
1185 const CBlockLocator locator(pindexNew);
1186 ::SetBestChain(locator);
1190 hashBestChain = hash;
1191 pindexBest = pindexNew;
1192 nBestHeight = pindexBest->nHeight;
1193 bnBestChainWork = pindexNew->bnChainWork;
1194 nTimeBestReceived = GetTime();
1195 nTransactionsUpdated++;
1196 printf("SetBestChain: new best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
1202 bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
1204 // Check for duplicate
1205 uint256 hash = GetHash();
1206 if (mapBlockIndex.count(hash))
1207 return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
1209 // Construct new block index object
1210 CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
1212 return error("AddToBlockIndex() : new CBlockIndex failed");
1213 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
1214 pindexNew->phashBlock = &((*mi).first);
1215 map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
1216 if (miPrev != mapBlockIndex.end())
1218 pindexNew->pprev = (*miPrev).second;
1219 pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
1221 pindexNew->bnChainWork = (pindexNew->pprev ? pindexNew->pprev->bnChainWork : 0) + pindexNew->GetBlockWork();
1225 txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
1226 if (!txdb.TxnCommit())
1230 if (pindexNew->bnChainWork > bnBestChainWork)
1231 if (!SetBestChain(txdb, pindexNew))
1236 if (pindexNew == pindexBest)
1238 // Notify UI to display prev block's coinbase if it was ours
1239 static uint256 hashPrevBestCoinBase;
1240 UpdatedTransaction(hashPrevBestCoinBase);
1241 hashPrevBestCoinBase = vtx[0].GetHash();
1251 bool CBlock::CheckBlock() const
1253 // These are checks that are independent of context
1254 // that can be verified before saving an orphan block.
1257 if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
1258 return error("CheckBlock() : size limits failed");
1260 // Check proof of work matches claimed amount
1261 if (!CheckProofOfWork(GetHash(), nBits))
1262 return error("CheckBlock() : proof of work failed");
1265 if (GetBlockTime() > GetAdjustedTime() + 2 * 60 * 60)
1266 return error("CheckBlock() : block timestamp too far in the future");
1268 // First transaction must be coinbase, the rest must not be
1269 if (vtx.empty() || !vtx[0].IsCoinBase())
1270 return error("CheckBlock() : first tx is not coinbase");
1271 for (int i = 1; i < vtx.size(); i++)
1272 if (vtx[i].IsCoinBase())
1273 return error("CheckBlock() : more than one coinbase");
1275 // Check transactions
1276 BOOST_FOREACH(const CTransaction& tx, vtx)
1277 if (!tx.CheckTransaction())
1278 return error("CheckBlock() : CheckTransaction failed");
1280 // Check that it's not full of nonstandard transactions
1281 if (GetSigOpCount() > MAX_BLOCK_SIGOPS)
1282 return error("CheckBlock() : too many nonstandard transactions");
1285 if (hashMerkleRoot != BuildMerkleTree())
1286 return error("CheckBlock() : hashMerkleRoot mismatch");
1291 bool CBlock::AcceptBlock()
1293 // Check for duplicate
1294 uint256 hash = GetHash();
1295 if (mapBlockIndex.count(hash))
1296 return error("AcceptBlock() : block already in mapBlockIndex");
1298 // Get prev block index
1299 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
1300 if (mi == mapBlockIndex.end())
1301 return error("AcceptBlock() : prev block not found");
1302 CBlockIndex* pindexPrev = (*mi).second;
1303 int nHeight = pindexPrev->nHeight+1;
1305 // Check proof of work
1306 if (nBits != GetNextWorkRequired(pindexPrev))
1307 return error("AcceptBlock() : incorrect proof of work");
1309 // Check timestamp against prev
1310 if (GetBlockTime() <= pindexPrev->GetMedianTimePast())
1311 return error("AcceptBlock() : block's timestamp is too early");
1313 // Check that all transactions are finalized
1314 BOOST_FOREACH(const CTransaction& tx, vtx)
1315 if (!tx.IsFinal(nHeight, GetBlockTime()))
1316 return error("AcceptBlock() : contains a non-final transaction");
1318 // Check that the block chain matches the known block chain up to a checkpoint
1320 if ((nHeight == 11111 && hash != uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")) ||
1321 (nHeight == 33333 && hash != uint256("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6")) ||
1322 (nHeight == 68555 && hash != uint256("0x00000000001e1b4903550a0b96e9a9405c8a95f387162e4944e8d9fbe501cd6a")) ||
1323 (nHeight == 70567 && hash != uint256("0x00000000006a49b14bcf27462068f1264c961f11fa2e0eddd2be0791e1d4124a")) ||
1324 (nHeight == 74000 && hash != uint256("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20")) ||
1325 (nHeight == 105000 && hash != uint256("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97")) ||
1326 (nHeight == 118000 && hash != uint256("0x000000000000774a7f8a7a12dc906ddb9e17e75d684f15e00f8767f9e8f36553")) ||
1327 (nHeight == 134444 && hash != uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe")) ||
1328 (nHeight == 140700 && hash != uint256("0x000000000000033b512028abb90e1626d8b346fd0ed598ac0a3c371138dce2bd")))
1329 return error("AcceptBlock() : rejected by checkpoint lockin at %d", nHeight);
1331 // Write block to history file
1332 if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK)))
1333 return error("AcceptBlock() : out of disk space");
1334 unsigned int nFile = -1;
1335 unsigned int nBlockPos = 0;
1336 if (!WriteToDisk(nFile, nBlockPos))
1337 return error("AcceptBlock() : WriteToDisk failed");
1338 if (!AddToBlockIndex(nFile, nBlockPos))
1339 return error("AcceptBlock() : AddToBlockIndex failed");
1341 // Relay inventory, but don't relay old inventory during initial block download
1342 if (hashBestChain == hash)
1343 CRITICAL_BLOCK(cs_vNodes)
1344 BOOST_FOREACH(CNode* pnode, vNodes)
1345 if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 140700))
1346 pnode->PushInventory(CInv(MSG_BLOCK, hash));
1351 bool static ProcessBlock(CNode* pfrom, CBlock* pblock)
1353 // Check for duplicate
1354 uint256 hash = pblock->GetHash();
1355 if (mapBlockIndex.count(hash))
1356 return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,20).c_str());
1357 if (mapOrphanBlocks.count(hash))
1358 return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,20).c_str());
1360 // Preliminary checks
1361 if (!pblock->CheckBlock())
1362 return error("ProcessBlock() : CheckBlock FAILED");
1364 // If don't already have its previous block, shunt it off to holding area until we get it
1365 if (!mapBlockIndex.count(pblock->hashPrevBlock))
1367 printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
1368 CBlock* pblock2 = new CBlock(*pblock);
1369 mapOrphanBlocks.insert(make_pair(hash, pblock2));
1370 mapOrphanBlocksByPrev.insert(make_pair(pblock2->hashPrevBlock, pblock2));
1372 // Ask this guy to fill in what we're missing
1374 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(pblock2));
1379 if (!pblock->AcceptBlock())
1380 return error("ProcessBlock() : AcceptBlock FAILED");
1382 // Recursively process any orphan blocks that depended on this one
1383 vector<uint256> vWorkQueue;
1384 vWorkQueue.push_back(hash);
1385 for (int i = 0; i < vWorkQueue.size(); i++)
1387 uint256 hashPrev = vWorkQueue[i];
1388 for (multimap<uint256, CBlock*>::iterator mi = mapOrphanBlocksByPrev.lower_bound(hashPrev);
1389 mi != mapOrphanBlocksByPrev.upper_bound(hashPrev);
1392 CBlock* pblockOrphan = (*mi).second;
1393 if (pblockOrphan->AcceptBlock())
1394 vWorkQueue.push_back(pblockOrphan->GetHash());
1395 mapOrphanBlocks.erase(pblockOrphan->GetHash());
1396 delete pblockOrphan;
1398 mapOrphanBlocksByPrev.erase(hashPrev);
1401 printf("ProcessBlock: ACCEPTED\n");
1412 bool CheckDiskSpace(uint64 nAdditionalBytes)
1414 uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
1416 // Check for 15MB because database could create another 10MB log file at any time
1417 if (nFreeBytesAvailable < (uint64)15000000 + nAdditionalBytes)
1420 string strMessage = _("Warning: Disk space is low ");
1421 strMiscWarning = strMessage;
1422 printf("*** %s\n", strMessage.c_str());
1423 ThreadSafeMessageBox(strMessage, "Bitcoin", wxOK | wxICON_EXCLAMATION);
1424 CreateThread(Shutdown, NULL);
1430 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
1434 FILE* file = fopen(strprintf("%s/blk%04d.dat", GetDataDir().c_str(), nFile).c_str(), pszMode);
1437 if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))
1439 if (fseek(file, nBlockPos, SEEK_SET) != 0)
1448 static unsigned int nCurrentBlockFile = 1;
1450 FILE* AppendBlockFile(unsigned int& nFileRet)
1455 FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
1458 if (fseek(file, 0, SEEK_END) != 0)
1460 // FAT32 filesize max 4GB, fseek and ftell max 2GB, so we must stay under 2GB
1461 if (ftell(file) < 0x7F000000 - MAX_SIZE)
1463 nFileRet = nCurrentBlockFile;
1467 nCurrentBlockFile++;
1471 bool LoadBlockIndex(bool fAllowNew)
1475 hashGenesisBlock = uint256("0x00000007199508e34a9ff81e6ec0c477a4cccff2a4767a8eee39c11db367b008");
1476 bnProofOfWorkLimit = CBigNum(~uint256(0) >> 28);
1477 pchMessageStart[0] = 0xfa;
1478 pchMessageStart[1] = 0xbf;
1479 pchMessageStart[2] = 0xb5;
1480 pchMessageStart[3] = 0xda;
1487 if (!txdb.LoadBlockIndex())
1492 // Init with genesis block
1494 if (mapBlockIndex.empty())
1500 // CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
1501 // CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
1502 // CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
1503 // CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
1504 // vMerkleTree: 4a5e1e
1507 const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
1509 txNew.vin.resize(1);
1510 txNew.vout.resize(1);
1511 txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
1512 txNew.vout[0].nValue = 50 * COIN;
1513 txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
1515 block.vtx.push_back(txNew);
1516 block.hashPrevBlock = 0;
1517 block.hashMerkleRoot = block.BuildMerkleTree();
1519 block.nTime = 1231006505;
1520 block.nBits = 0x1d00ffff;
1521 block.nNonce = 2083236893;
1525 block.nTime = 1296688602;
1526 block.nBits = 0x1d07fff8;
1527 block.nNonce = 384568319;
1531 printf("%s\n", block.GetHash().ToString().c_str());
1532 printf("%s\n", hashGenesisBlock.ToString().c_str());
1533 printf("%s\n", block.hashMerkleRoot.ToString().c_str());
1534 assert(block.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
1536 assert(block.GetHash() == hashGenesisBlock);
1538 // Start new block file
1540 unsigned int nBlockPos;
1541 if (!block.WriteToDisk(nFile, nBlockPos))
1542 return error("LoadBlockIndex() : writing genesis block to disk failed");
1543 if (!block.AddToBlockIndex(nFile, nBlockPos))
1544 return error("LoadBlockIndex() : genesis block not accepted");
1552 void PrintBlockTree()
1554 // precompute tree structure
1555 map<CBlockIndex*, vector<CBlockIndex*> > mapNext;
1556 for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
1558 CBlockIndex* pindex = (*mi).second;
1559 mapNext[pindex->pprev].push_back(pindex);
1561 //while (rand() % 3 == 0)
1562 // mapNext[pindex->pprev].push_back(pindex);
1565 vector<pair<int, CBlockIndex*> > vStack;
1566 vStack.push_back(make_pair(0, pindexGenesisBlock));
1569 while (!vStack.empty())
1571 int nCol = vStack.back().first;
1572 CBlockIndex* pindex = vStack.back().second;
1575 // print split or gap
1576 if (nCol > nPrevCol)
1578 for (int i = 0; i < nCol-1; i++)
1582 else if (nCol < nPrevCol)
1584 for (int i = 0; i < nCol; i++)
1591 for (int i = 0; i < nCol; i++)
1596 block.ReadFromDisk(pindex);
1597 printf("%d (%u,%u) %s %s tx %d",
1601 block.GetHash().ToString().substr(0,20).c_str(),
1602 DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
1605 PrintWallets(block);
1607 // put the main timechain first
1608 vector<CBlockIndex*>& vNext = mapNext[pindex];
1609 for (int i = 0; i < vNext.size(); i++)
1611 if (vNext[i]->pnext)
1613 swap(vNext[0], vNext[i]);
1619 for (int i = 0; i < vNext.size(); i++)
1620 vStack.push_back(make_pair(nCol+i, vNext[i]));
1633 //////////////////////////////////////////////////////////////////////////////
1638 map<uint256, CAlert> mapAlerts;
1639 CCriticalSection cs_mapAlerts;
1641 string GetWarnings(string strFor)
1644 string strStatusBar;
1646 if (GetBoolArg("-testsafemode"))
1649 // Misc warnings like out of disk space and clock is wrong
1650 if (strMiscWarning != "")
1653 strStatusBar = strMiscWarning;
1656 // Longer invalid proof-of-work chain
1657 if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
1660 strStatusBar = strRPC = "WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.";
1664 CRITICAL_BLOCK(cs_mapAlerts)
1666 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
1668 const CAlert& alert = item.second;
1669 if (alert.AppliesToMe() && alert.nPriority > nPriority)
1671 nPriority = alert.nPriority;
1672 strStatusBar = alert.strStatusBar;
1677 if (strFor == "statusbar")
1678 return strStatusBar;
1679 else if (strFor == "rpc")
1681 assert(!"GetWarnings() : invalid parameter");
1685 bool CAlert::ProcessAlert()
1687 if (!CheckSignature())
1692 CRITICAL_BLOCK(cs_mapAlerts)
1694 // Cancel previous alerts
1695 for (map<uint256, CAlert>::iterator mi = mapAlerts.begin(); mi != mapAlerts.end();)
1697 const CAlert& alert = (*mi).second;
1700 printf("cancelling alert %d\n", alert.nID);
1701 mapAlerts.erase(mi++);
1703 else if (!alert.IsInEffect())
1705 printf("expiring alert %d\n", alert.nID);
1706 mapAlerts.erase(mi++);
1712 // Check if this alert has been cancelled
1713 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
1715 const CAlert& alert = item.second;
1716 if (alert.Cancels(*this))
1718 printf("alert already cancelled by %d\n", alert.nID);
1724 mapAlerts.insert(make_pair(GetHash(), *this));
1727 printf("accepted alert %d, AppliesToMe()=%d\n", nID, AppliesToMe());
1739 //////////////////////////////////////////////////////////////////////////////
1745 bool static AlreadyHave(CTxDB& txdb, const CInv& inv)
1749 case MSG_TX: return mapTransactions.count(inv.hash) || mapOrphanTransactions.count(inv.hash) || txdb.ContainsTx(inv.hash);
1750 case MSG_BLOCK: return mapBlockIndex.count(inv.hash) || mapOrphanBlocks.count(inv.hash);
1752 // Don't know what it is, just say we already got one
1759 // The message start string is designed to be unlikely to occur in normal data.
1760 // The characters are rarely used upper ascii, not valid as UTF-8, and produce
1761 // a large 4-byte int at any alignment.
1762 unsigned char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
1765 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
1767 static map<unsigned int, vector<unsigned char> > mapReuseKey;
1768 RandAddSeedPerfmon();
1770 printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
1771 printf("received: %s (%d bytes)\n", strCommand.c_str(), vRecv.size());
1773 if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
1775 printf("dropmessagestest DROPPING RECV MESSAGE\n");
1783 if (strCommand == "version")
1785 // Each connection can only send one version message
1786 if (pfrom->nVersion != 0)
1793 vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
1794 if (pfrom->nVersion == 10300)
1795 pfrom->nVersion = 300;
1796 if (pfrom->nVersion >= 106 && !vRecv.empty())
1797 vRecv >> addrFrom >> nNonce;
1798 if (pfrom->nVersion >= 106 && !vRecv.empty())
1799 vRecv >> pfrom->strSubVer;
1800 if (pfrom->nVersion >= 209 && !vRecv.empty())
1801 vRecv >> pfrom->nStartingHeight;
1803 if (pfrom->nVersion == 0)
1806 // Disconnect if we connected to ourself
1807 if (nNonce == nLocalHostNonce && nNonce > 1)
1809 printf("connected to self at %s, disconnecting\n", pfrom->addr.ToString().c_str());
1810 pfrom->fDisconnect = true;
1814 // Be shy and don't send version until we hear
1815 if (pfrom->fInbound)
1816 pfrom->PushVersion();
1818 pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
1820 AddTimeData(pfrom->addr.ip, nTime);
1823 if (pfrom->nVersion >= 209)
1824 pfrom->PushMessage("verack");
1825 pfrom->vSend.SetVersion(min(pfrom->nVersion, VERSION));
1826 if (pfrom->nVersion < 209)
1827 pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
1829 if (!pfrom->fInbound)
1831 // Advertise our address
1832 if (addrLocalHost.IsRoutable() && !fUseProxy)
1834 CAddress addr(addrLocalHost);
1835 addr.nTime = GetAdjustedTime();
1836 pfrom->PushAddress(addr);
1839 // Get recent addresses
1840 if (pfrom->nVersion >= 31402 || mapAddresses.size() < 1000)
1842 pfrom->PushMessage("getaddr");
1843 pfrom->fGetAddr = true;
1847 // Ask the first connected node for block updates
1848 static int nAskedForBlocks;
1849 if (!pfrom->fClient &&
1850 (pfrom->nVersion < 32000 || pfrom->nVersion >= 32400) &&
1851 (nAskedForBlocks < 1 || vNodes.size() <= 1))
1854 pfrom->PushGetBlocks(pindexBest, uint256(0));
1858 CRITICAL_BLOCK(cs_mapAlerts)
1859 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
1860 item.second.RelayTo(pfrom);
1862 pfrom->fSuccessfullyConnected = true;
1864 printf("version message: version %d, blocks=%d\n", pfrom->nVersion, pfrom->nStartingHeight);
1868 else if (pfrom->nVersion == 0)
1870 // Must have a version message before anything else
1875 else if (strCommand == "verack")
1877 pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
1881 else if (strCommand == "addr")
1883 vector<CAddress> vAddr;
1886 // Don't want addr from older versions unless seeding
1887 if (pfrom->nVersion < 209)
1889 if (pfrom->nVersion < 31402 && mapAddresses.size() > 1000)
1891 if (vAddr.size() > 1000)
1892 return error("message addr size() = %d", vAddr.size());
1894 // Store the new addresses
1897 int64 nNow = GetAdjustedTime();
1898 int64 nSince = nNow - 10 * 60;
1899 BOOST_FOREACH(CAddress& addr, vAddr)
1903 // ignore IPv6 for now, since it isn't implemented anyway
1906 if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
1907 addr.nTime = nNow - 5 * 24 * 60 * 60;
1908 AddAddress(addr, 2 * 60 * 60, &addrDB);
1909 pfrom->AddAddressKnown(addr);
1910 if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
1912 // Relay to a limited number of other nodes
1913 CRITICAL_BLOCK(cs_vNodes)
1915 // Use deterministic randomness to send to the same nodes for 24 hours
1916 // at a time so the setAddrKnowns of the chosen nodes prevent repeats
1917 static uint256 hashSalt;
1919 RAND_bytes((unsigned char*)&hashSalt, sizeof(hashSalt));
1920 uint256 hashRand = hashSalt ^ (((int64)addr.ip)<<32) ^ ((GetTime()+addr.ip)/(24*60*60));
1921 hashRand = Hash(BEGIN(hashRand), END(hashRand));
1922 multimap<uint256, CNode*> mapMix;
1923 BOOST_FOREACH(CNode* pnode, vNodes)
1925 if (pnode->nVersion < 31402)
1927 unsigned int nPointer;
1928 memcpy(&nPointer, &pnode, sizeof(nPointer));
1929 uint256 hashKey = hashRand ^ nPointer;
1930 hashKey = Hash(BEGIN(hashKey), END(hashKey));
1931 mapMix.insert(make_pair(hashKey, pnode));
1933 int nRelayNodes = 2;
1934 for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
1935 ((*mi).second)->PushAddress(addr);
1939 addrDB.TxnCommit(); // Save addresses (it's ok if this fails)
1940 if (vAddr.size() < 1000)
1941 pfrom->fGetAddr = false;
1945 else if (strCommand == "inv")
1949 if (vInv.size() > 50000)
1950 return error("message inv size() = %d", vInv.size());
1953 BOOST_FOREACH(const CInv& inv, vInv)
1957 pfrom->AddInventoryKnown(inv);
1959 bool fAlreadyHave = AlreadyHave(txdb, inv);
1961 printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
1965 else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash))
1966 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
1968 // Track requests for our stuff
1969 Inventory(inv.hash);
1974 else if (strCommand == "getdata")
1978 if (vInv.size() > 50000)
1979 return error("message getdata size() = %d", vInv.size());
1981 BOOST_FOREACH(const CInv& inv, vInv)
1985 printf("received getdata for: %s\n", inv.ToString().c_str());
1987 if (inv.type == MSG_BLOCK)
1989 // Send block from disk
1990 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(inv.hash);
1991 if (mi != mapBlockIndex.end())
1994 block.ReadFromDisk((*mi).second);
1995 pfrom->PushMessage("block", block);
1997 // Trigger them to send a getblocks request for the next batch of inventory
1998 if (inv.hash == pfrom->hashContinue)
2000 // Bypass PushInventory, this must send even if redundant,
2001 // and we want it right after the last block so they don't
2002 // wait for other stuff first.
2004 vInv.push_back(CInv(MSG_BLOCK, hashBestChain));
2005 pfrom->PushMessage("inv", vInv);
2006 pfrom->hashContinue = 0;
2010 else if (inv.IsKnownType())
2012 // Send stream from relay memory
2013 CRITICAL_BLOCK(cs_mapRelay)
2015 map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
2016 if (mi != mapRelay.end())
2017 pfrom->PushMessage(inv.GetCommand(), (*mi).second);
2021 // Track requests for our stuff
2022 Inventory(inv.hash);
2027 else if (strCommand == "getblocks")
2029 CBlockLocator locator;
2031 vRecv >> locator >> hashStop;
2033 // Find the last block the caller has in the main chain
2034 CBlockIndex* pindex = locator.GetBlockIndex();
2036 // Send the rest of the chain
2038 pindex = pindex->pnext;
2039 int nLimit = 500 + locator.GetDistanceBack();
2040 unsigned int nBytes = 0;
2041 printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
2042 for (; pindex; pindex = pindex->pnext)
2044 if (pindex->GetBlockHash() == hashStop)
2046 printf(" getblocks stopping at %d %s (%u bytes)\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str(), nBytes);
2049 pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
2051 block.ReadFromDisk(pindex, true);
2052 nBytes += block.GetSerializeSize(SER_NETWORK);
2053 if (--nLimit <= 0 || nBytes >= SendBufferSize()/2)
2055 // When this block is requested, we'll send an inv that'll make them
2056 // getblocks the next batch of inventory.
2057 printf(" getblocks stopping at limit %d %s (%u bytes)\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str(), nBytes);
2058 pfrom->hashContinue = pindex->GetBlockHash();
2065 else if (strCommand == "getheaders")
2067 CBlockLocator locator;
2069 vRecv >> locator >> hashStop;
2071 CBlockIndex* pindex = NULL;
2072 if (locator.IsNull())
2074 // If locator is null, return the hashStop block
2075 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashStop);
2076 if (mi == mapBlockIndex.end())
2078 pindex = (*mi).second;
2082 // Find the last block the caller has in the main chain
2083 pindex = locator.GetBlockIndex();
2085 pindex = pindex->pnext;
2088 vector<CBlock> vHeaders;
2089 int nLimit = 2000 + locator.GetDistanceBack();
2090 printf("getheaders %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
2091 for (; pindex; pindex = pindex->pnext)
2093 vHeaders.push_back(pindex->GetBlockHeader());
2094 if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
2097 pfrom->PushMessage("headers", vHeaders);
2101 else if (strCommand == "tx")
2103 vector<uint256> vWorkQueue;
2104 CDataStream vMsg(vRecv);
2108 CInv inv(MSG_TX, tx.GetHash());
2109 pfrom->AddInventoryKnown(inv);
2111 bool fMissingInputs = false;
2112 if (tx.AcceptToMemoryPool(true, &fMissingInputs))
2114 SyncWithWallets(tx, NULL, true);
2115 RelayMessage(inv, vMsg);
2116 mapAlreadyAskedFor.erase(inv);
2117 vWorkQueue.push_back(inv.hash);
2119 // Recursively process any orphan transactions that depended on this one
2120 for (int i = 0; i < vWorkQueue.size(); i++)
2122 uint256 hashPrev = vWorkQueue[i];
2123 for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(hashPrev);
2124 mi != mapOrphanTransactionsByPrev.upper_bound(hashPrev);
2127 const CDataStream& vMsg = *((*mi).second);
2129 CDataStream(vMsg) >> tx;
2130 CInv inv(MSG_TX, tx.GetHash());
2132 if (tx.AcceptToMemoryPool(true))
2134 printf(" accepted orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
2135 SyncWithWallets(tx, NULL, true);
2136 RelayMessage(inv, vMsg);
2137 mapAlreadyAskedFor.erase(inv);
2138 vWorkQueue.push_back(inv.hash);
2143 BOOST_FOREACH(uint256 hash, vWorkQueue)
2144 EraseOrphanTx(hash);
2146 else if (fMissingInputs)
2148 printf("storing orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
2154 else if (strCommand == "block")
2159 printf("received block %s\n", block.GetHash().ToString().substr(0,20).c_str());
2162 CInv inv(MSG_BLOCK, block.GetHash());
2163 pfrom->AddInventoryKnown(inv);
2165 if (ProcessBlock(pfrom, &block))
2166 mapAlreadyAskedFor.erase(inv);
2170 else if (strCommand == "getaddr")
2172 // Nodes rebroadcast an addr every 24 hours
2173 pfrom->vAddrToSend.clear();
2174 int64 nSince = GetAdjustedTime() - 3 * 60 * 60; // in the last 3 hours
2175 CRITICAL_BLOCK(cs_mapAddresses)
2177 unsigned int nCount = 0;
2178 BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
2180 const CAddress& addr = item.second;
2181 if (addr.nTime > nSince)
2184 BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
2186 const CAddress& addr = item.second;
2187 if (addr.nTime > nSince && GetRand(nCount) < 2500)
2188 pfrom->PushAddress(addr);
2194 else if (strCommand == "checkorder")
2199 if (!GetBoolArg("-allowreceivebyip"))
2201 pfrom->PushMessage("reply", hashReply, (int)2, string(""));
2208 /// we have a chance to check the order here
2210 // Keep giving the same key to the same ip until they use it
2211 if (!mapReuseKey.count(pfrom->addr.ip))
2212 pwalletMain->GetKeyFromPool(mapReuseKey[pfrom->addr.ip], true);
2214 // Send back approval of order and pubkey to use
2215 CScript scriptPubKey;
2216 scriptPubKey << mapReuseKey[pfrom->addr.ip] << OP_CHECKSIG;
2217 pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
2221 else if (strCommand == "reply")
2226 CRequestTracker tracker;
2227 CRITICAL_BLOCK(pfrom->cs_mapRequests)
2229 map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
2230 if (mi != pfrom->mapRequests.end())
2232 tracker = (*mi).second;
2233 pfrom->mapRequests.erase(mi);
2236 if (!tracker.IsNull())
2237 tracker.fn(tracker.param1, vRecv);
2241 else if (strCommand == "ping")
2246 else if (strCommand == "alert")
2251 if (alert.ProcessAlert())
2254 pfrom->setKnown.insert(alert.GetHash());
2255 CRITICAL_BLOCK(cs_vNodes)
2256 BOOST_FOREACH(CNode* pnode, vNodes)
2257 alert.RelayTo(pnode);
2264 // Ignore unknown commands for extensibility
2268 // Update the last seen time for this node's address
2269 if (pfrom->fNetworkNode)
2270 if (strCommand == "version" || strCommand == "addr" || strCommand == "inv" || strCommand == "getdata" || strCommand == "ping")
2271 AddressCurrentlyConnected(pfrom->addr);
2277 bool ProcessMessages(CNode* pfrom)
2279 CDataStream& vRecv = pfrom->vRecv;
2283 // printf("ProcessMessages(%u bytes)\n", vRecv.size());
2287 // (4) message start
2296 // Scan for message start
2297 CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
2298 int nHeaderSize = vRecv.GetSerializeSize(CMessageHeader());
2299 if (vRecv.end() - pstart < nHeaderSize)
2301 if (vRecv.size() > nHeaderSize)
2303 printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
2304 vRecv.erase(vRecv.begin(), vRecv.end() - nHeaderSize);
2308 if (pstart - vRecv.begin() > 0)
2309 printf("\n\nPROCESSMESSAGE SKIPPED %d BYTES\n\n", pstart - vRecv.begin());
2310 vRecv.erase(vRecv.begin(), pstart);
2313 vector<char> vHeaderSave(vRecv.begin(), vRecv.begin() + nHeaderSize);
2318 printf("\n\nPROCESSMESSAGE: ERRORS IN HEADER %s\n\n\n", hdr.GetCommand().c_str());
2321 string strCommand = hdr.GetCommand();
2324 unsigned int nMessageSize = hdr.nMessageSize;
2325 if (nMessageSize > MAX_SIZE)
2327 printf("ProcessMessage(%s, %u bytes) : nMessageSize > MAX_SIZE\n", strCommand.c_str(), nMessageSize);
2330 if (nMessageSize > vRecv.size())
2332 // Rewind and wait for rest of message
2333 vRecv.insert(vRecv.begin(), vHeaderSave.begin(), vHeaderSave.end());
2338 if (vRecv.GetVersion() >= 209)
2340 uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
2341 unsigned int nChecksum = 0;
2342 memcpy(&nChecksum, &hash, sizeof(nChecksum));
2343 if (nChecksum != hdr.nChecksum)
2345 printf("ProcessMessage(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
2346 strCommand.c_str(), nMessageSize, nChecksum, hdr.nChecksum);
2351 // Copy message to its own buffer
2352 CDataStream vMsg(vRecv.begin(), vRecv.begin() + nMessageSize, vRecv.nType, vRecv.nVersion);
2353 vRecv.ignore(nMessageSize);
2359 CRITICAL_BLOCK(cs_main)
2360 fRet = ProcessMessage(pfrom, strCommand, vMsg);
2364 catch (std::ios_base::failure& e)
2366 if (strstr(e.what(), "end of data"))
2368 // Allow exceptions from underlength message on vRecv
2369 printf("ProcessMessage(%s, %u bytes) : Exception '%s' caught, normally caused by a message being shorter than its stated length\n", strCommand.c_str(), nMessageSize, e.what());
2371 else if (strstr(e.what(), "size too large"))
2373 // Allow exceptions from overlong size
2374 printf("ProcessMessage(%s, %u bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
2378 PrintExceptionContinue(&e, "ProcessMessage()");
2381 catch (std::exception& e) {
2382 PrintExceptionContinue(&e, "ProcessMessage()");
2384 PrintExceptionContinue(NULL, "ProcessMessage()");
2388 printf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand.c_str(), nMessageSize);
2396 bool SendMessages(CNode* pto, bool fSendTrickle)
2398 CRITICAL_BLOCK(cs_main)
2400 // Don't send anything until we get their version message
2401 if (pto->nVersion == 0)
2405 if (pto->nLastSend && GetTime() - pto->nLastSend > 30 * 60 && pto->vSend.empty())
2406 pto->PushMessage("ping");
2408 // Resend wallet transactions that haven't gotten in a block yet
2409 ResendWalletTransactions();
2411 // Address refresh broadcast
2412 static int64 nLastRebroadcast;
2413 if (GetTime() - nLastRebroadcast > 24 * 60 * 60)
2415 nLastRebroadcast = GetTime();
2416 CRITICAL_BLOCK(cs_vNodes)
2418 BOOST_FOREACH(CNode* pnode, vNodes)
2420 // Periodically clear setAddrKnown to allow refresh broadcasts
2421 pnode->setAddrKnown.clear();
2423 // Rebroadcast our address
2424 if (addrLocalHost.IsRoutable() && !fUseProxy)
2426 CAddress addr(addrLocalHost);
2427 addr.nTime = GetAdjustedTime();
2428 pnode->PushAddress(addr);
2434 // Clear out old addresses periodically so it's not too much work at once
2435 static int64 nLastClear;
2436 if (nLastClear == 0)
2437 nLastClear = GetTime();
2438 if (GetTime() - nLastClear > 10 * 60 && vNodes.size() >= 3)
2440 nLastClear = GetTime();
2441 CRITICAL_BLOCK(cs_mapAddresses)
2444 int64 nSince = GetAdjustedTime() - 14 * 24 * 60 * 60;
2445 for (map<vector<unsigned char>, CAddress>::iterator mi = mapAddresses.begin();
2446 mi != mapAddresses.end();)
2448 const CAddress& addr = (*mi).second;
2449 if (addr.nTime < nSince)
2451 if (mapAddresses.size() < 1000 || GetTime() > nLastClear + 20)
2453 addrdb.EraseAddress(addr);
2454 mapAddresses.erase(mi++);
2468 vector<CAddress> vAddr;
2469 vAddr.reserve(pto->vAddrToSend.size());
2470 BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
2472 // returns true if wasn't already contained in the set
2473 if (pto->setAddrKnown.insert(addr).second)
2475 vAddr.push_back(addr);
2476 // receiver rejects addr messages larger than 1000
2477 if (vAddr.size() >= 1000)
2479 pto->PushMessage("addr", vAddr);
2484 pto->vAddrToSend.clear();
2486 pto->PushMessage("addr", vAddr);
2491 // Message: inventory
2494 vector<CInv> vInvWait;
2495 CRITICAL_BLOCK(pto->cs_inventory)
2497 vInv.reserve(pto->vInventoryToSend.size());
2498 vInvWait.reserve(pto->vInventoryToSend.size());
2499 BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
2501 if (pto->setInventoryKnown.count(inv))
2504 // trickle out tx inv to protect privacy
2505 if (inv.type == MSG_TX && !fSendTrickle)
2507 // 1/4 of tx invs blast to all immediately
2508 static uint256 hashSalt;
2510 RAND_bytes((unsigned char*)&hashSalt, sizeof(hashSalt));
2511 uint256 hashRand = inv.hash ^ hashSalt;
2512 hashRand = Hash(BEGIN(hashRand), END(hashRand));
2513 bool fTrickleWait = ((hashRand & 3) != 0);
2515 // always trickle our own transactions
2519 if (GetTransaction(inv.hash, wtx))
2521 fTrickleWait = true;
2526 vInvWait.push_back(inv);
2531 // returns true if wasn't already contained in the set
2532 if (pto->setInventoryKnown.insert(inv).second)
2534 vInv.push_back(inv);
2535 if (vInv.size() >= 1000)
2537 pto->PushMessage("inv", vInv);
2542 pto->vInventoryToSend = vInvWait;
2545 pto->PushMessage("inv", vInv);
2551 vector<CInv> vGetData;
2552 int64 nNow = GetTime() * 1000000;
2554 while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
2556 const CInv& inv = (*pto->mapAskFor.begin()).second;
2557 if (!AlreadyHave(txdb, inv))
2559 printf("sending getdata: %s\n", inv.ToString().c_str());
2560 vGetData.push_back(inv);
2561 if (vGetData.size() >= 1000)
2563 pto->PushMessage("getdata", vGetData);
2567 mapAlreadyAskedFor[inv] = nNow;
2568 pto->mapAskFor.erase(pto->mapAskFor.begin());
2570 if (!vGetData.empty())
2571 pto->PushMessage("getdata", vGetData);
2590 //////////////////////////////////////////////////////////////////////////////
2595 int static FormatHashBlocks(void* pbuffer, unsigned int len)
2597 unsigned char* pdata = (unsigned char*)pbuffer;
2598 unsigned int blocks = 1 + ((len + 8) / 64);
2599 unsigned char* pend = pdata + 64 * blocks;
2600 memset(pdata + len, 0, 64 * blocks - len);
2602 unsigned int bits = len * 8;
2603 pend[-1] = (bits >> 0) & 0xff;
2604 pend[-2] = (bits >> 8) & 0xff;
2605 pend[-3] = (bits >> 16) & 0xff;
2606 pend[-4] = (bits >> 24) & 0xff;
2610 using CryptoPP::ByteReverse;
2612 static const unsigned int pSHA256InitState[8] =
2613 {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
2615 inline void SHA256Transform(void* pstate, void* pinput, const void* pinit)
2617 memcpy(pstate, pinit, 32);
2618 CryptoPP::SHA256::Transform((CryptoPP::word32*)pstate, (CryptoPP::word32*)pinput);
2622 // ScanHash scans nonces looking for a hash with at least some zero bits.
2623 // It operates on big endian data. Caller does the byte reversing.
2624 // All input buffers are 16-byte aligned. nNonce is usually preserved
2625 // between calls, but periodically or if nNonce is 0xffff0000 or above,
2626 // the block is rebuilt and nNonce starts over at zero.
2628 unsigned int static ScanHash_CryptoPP(char* pmidstate, char* pdata, char* phash1, char* phash, unsigned int& nHashesDone)
2630 unsigned int& nNonce = *(unsigned int*)(pdata + 12);
2634 // Hash pdata using pmidstate as the starting state into
2635 // preformatted buffer phash1, then hash phash1 into phash
2637 SHA256Transform(phash1, pdata, pmidstate);
2638 SHA256Transform(phash, phash1, pSHA256InitState);
2640 // Return the nonce if the hash has at least some zero bits,
2641 // caller will check if it has enough to reach the target
2642 if (((unsigned short*)phash)[14] == 0)
2645 // If nothing found after trying for a while, return -1
2646 if ((nNonce & 0xffff) == 0)
2648 nHashesDone = 0xffff+1;
2654 // Some explaining would be appreciated
2659 set<uint256> setDependsOn;
2662 COrphan(CTransaction* ptxIn)
2670 printf("COrphan(hash=%s, dPriority=%.1f)\n", ptx->GetHash().ToString().substr(0,10).c_str(), dPriority);
2671 BOOST_FOREACH(uint256 hash, setDependsOn)
2672 printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
2677 CBlock* CreateNewBlock(CReserveKey& reservekey)
2679 CBlockIndex* pindexPrev = pindexBest;
2682 auto_ptr<CBlock> pblock(new CBlock());
2686 // Create coinbase tx
2688 txNew.vin.resize(1);
2689 txNew.vin[0].prevout.SetNull();
2690 txNew.vout.resize(1);
2691 txNew.vout[0].scriptPubKey << reservekey.GetReservedKey() << OP_CHECKSIG;
2693 // Add our coinbase tx as first transaction
2694 pblock->vtx.push_back(txNew);
2696 // Collect memory pool transactions into the block
2698 CRITICAL_BLOCK(cs_main)
2699 CRITICAL_BLOCK(cs_mapTransactions)
2703 // Priority order to process transactions
2704 list<COrphan> vOrphan; // list memory doesn't move
2705 map<uint256, vector<COrphan*> > mapDependers;
2706 multimap<double, CTransaction*> mapPriority;
2707 for (map<uint256, CTransaction>::iterator mi = mapTransactions.begin(); mi != mapTransactions.end(); ++mi)
2709 CTransaction& tx = (*mi).second;
2710 if (tx.IsCoinBase() || !tx.IsFinal())
2713 COrphan* porphan = NULL;
2714 double dPriority = 0;
2715 BOOST_FOREACH(const CTxIn& txin, tx.vin)
2717 // Read prev transaction
2718 CTransaction txPrev;
2720 if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
2722 // Has to wait for dependencies
2725 // Use list for automatic deletion
2726 vOrphan.push_back(COrphan(&tx));
2727 porphan = &vOrphan.back();
2729 mapDependers[txin.prevout.hash].push_back(porphan);
2730 porphan->setDependsOn.insert(txin.prevout.hash);
2733 int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
2735 // Read block header
2736 int nConf = txindex.GetDepthInMainChain();
2738 dPriority += (double)nValueIn * nConf;
2740 if (fDebug && GetBoolArg("-printpriority"))
2741 printf("priority nValueIn=%-12I64d nConf=%-5d dPriority=%-20.1f\n", nValueIn, nConf, dPriority);
2744 // Priority is sum(valuein * age) / txsize
2745 dPriority /= ::GetSerializeSize(tx, SER_NETWORK);
2748 porphan->dPriority = dPriority;
2750 mapPriority.insert(make_pair(-dPriority, &(*mi).second));
2752 if (fDebug && GetBoolArg("-printpriority"))
2754 printf("priority %-20.1f %s\n%s", dPriority, tx.GetHash().ToString().substr(0,10).c_str(), tx.ToString().c_str());
2761 // Collect transactions into block
2762 map<uint256, CTxIndex> mapTestPool;
2763 uint64 nBlockSize = 1000;
2764 int nBlockSigOps = 100;
2765 while (!mapPriority.empty())
2767 // Take highest priority transaction off priority queue
2768 double dPriority = -(*mapPriority.begin()).first;
2769 CTransaction& tx = *(*mapPriority.begin()).second;
2770 mapPriority.erase(mapPriority.begin());
2773 unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK);
2774 if (nBlockSize + nTxSize >= MAX_BLOCK_SIZE_GEN)
2776 int nTxSigOps = tx.GetSigOpCount();
2777 if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
2780 // Transaction fee required depends on block size
2781 bool fAllowFree = (nBlockSize + nTxSize < 4000 || CTransaction::AllowFree(dPriority));
2782 int64 nMinFee = tx.GetMinFee(nBlockSize, fAllowFree, true);
2784 // Connecting shouldn't fail due to dependency on other memory pool transactions
2785 // because we're already processing them in order of dependency
2786 map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
2787 if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, nFees, false, true, nMinFee))
2789 swap(mapTestPool, mapTestPoolTmp);
2792 pblock->vtx.push_back(tx);
2793 nBlockSize += nTxSize;
2794 nBlockSigOps += nTxSigOps;
2796 // Add transactions that depend on this one to the priority queue
2797 uint256 hash = tx.GetHash();
2798 if (mapDependers.count(hash))
2800 BOOST_FOREACH(COrphan* porphan, mapDependers[hash])
2802 if (!porphan->setDependsOn.empty())
2804 porphan->setDependsOn.erase(hash);
2805 if (porphan->setDependsOn.empty())
2806 mapPriority.insert(make_pair(-porphan->dPriority, porphan->ptx));
2812 pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nHeight+1, nFees);
2815 pblock->hashPrevBlock = pindexPrev->GetBlockHash();
2816 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
2817 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
2818 pblock->nBits = GetNextWorkRequired(pindexPrev);
2821 return pblock.release();
2825 void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
2827 // Update nExtraNonce
2828 static uint256 hashPrevBlock;
2829 if (hashPrevBlock != pblock->hashPrevBlock)
2832 hashPrevBlock = pblock->hashPrevBlock;
2835 pblock->vtx[0].vin[0].scriptSig = CScript() << pblock->nTime << CBigNum(nExtraNonce);
2836 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
2840 void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
2843 // Prebuild hash buffers
2850 uint256 hashPrevBlock;
2851 uint256 hashMerkleRoot;
2854 unsigned int nNonce;
2857 unsigned char pchPadding0[64];
2859 unsigned char pchPadding1[64];
2862 memset(&tmp, 0, sizeof(tmp));
2864 tmp.block.nVersion = pblock->nVersion;
2865 tmp.block.hashPrevBlock = pblock->hashPrevBlock;
2866 tmp.block.hashMerkleRoot = pblock->hashMerkleRoot;
2867 tmp.block.nTime = pblock->nTime;
2868 tmp.block.nBits = pblock->nBits;
2869 tmp.block.nNonce = pblock->nNonce;
2871 FormatHashBlocks(&tmp.block, sizeof(tmp.block));
2872 FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
2874 // Byte swap all the input buffer
2875 for (int i = 0; i < sizeof(tmp)/4; i++)
2876 ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
2878 // Precalc the first half of the first hash, which stays constant
2879 SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
2881 memcpy(pdata, &tmp.block, 128);
2882 memcpy(phash1, &tmp.hash1, 64);
2886 bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
2888 uint256 hash = pblock->GetHash();
2889 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
2891 if (hash > hashTarget)
2895 printf("BitcoinMiner:\n");
2896 printf("proof-of-work found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str());
2898 printf("%s ", DateTimeStrFormat("%x %H:%M", GetTime()).c_str());
2899 printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str());
2902 CRITICAL_BLOCK(cs_main)
2904 if (pblock->hashPrevBlock != hashBestChain)
2905 return error("BitcoinMiner : generated block is stale");
2907 // Remove key from key pool
2908 reservekey.KeepKey();
2910 // Track how many getdata requests this block gets
2911 CRITICAL_BLOCK(wallet.cs_wallet)
2912 wallet.mapRequestCount[pblock->GetHash()] = 0;
2914 // Process this block the same as if we had received it from another node
2915 if (!ProcessBlock(NULL, pblock))
2916 return error("BitcoinMiner : ProcessBlock, block not accepted");
2923 void static ThreadBitcoinMiner(void* parg);
2925 void static BitcoinMiner(CWallet *pwallet)
2927 printf("BitcoinMiner started\n");
2928 SetThreadPriority(THREAD_PRIORITY_LOWEST);
2930 // Each thread has its own key and counter
2931 CReserveKey reservekey(pwallet);
2932 unsigned int nExtraNonce = 0;
2934 while (fGenerateBitcoins)
2936 if (AffinityBugWorkaround(ThreadBitcoinMiner))
2940 while (vNodes.empty() || IsInitialBlockDownload())
2945 if (!fGenerateBitcoins)
2953 unsigned int nTransactionsUpdatedLast = nTransactionsUpdated;
2954 CBlockIndex* pindexPrev = pindexBest;
2956 auto_ptr<CBlock> pblock(CreateNewBlock(reservekey));
2959 IncrementExtraNonce(pblock.get(), pindexPrev, nExtraNonce);
2961 printf("Running BitcoinMiner with %d transactions in block\n", pblock->vtx.size());
2965 // Prebuild hash buffers
2967 char pmidstatebuf[32+16]; char* pmidstate = alignup<16>(pmidstatebuf);
2968 char pdatabuf[128+16]; char* pdata = alignup<16>(pdatabuf);
2969 char phash1buf[64+16]; char* phash1 = alignup<16>(phash1buf);
2971 FormatHashBuffers(pblock.get(), pmidstate, pdata, phash1);
2973 unsigned int& nBlockTime = *(unsigned int*)(pdata + 64 + 4);
2974 unsigned int& nBlockNonce = *(unsigned int*)(pdata + 64 + 12);
2980 int64 nStart = GetTime();
2981 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
2983 uint256& hash = *alignup<16>(hashbuf);
2986 unsigned int nHashesDone = 0;
2987 unsigned int nNonceFound;
2990 nNonceFound = ScanHash_CryptoPP(pmidstate, pdata + 64, phash1,
2991 (char*)&hash, nHashesDone);
2993 // Check if something found
2994 if (nNonceFound != -1)
2996 for (int i = 0; i < sizeof(hash)/4; i++)
2997 ((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]);
2999 if (hash <= hashTarget)
3002 pblock->nNonce = ByteReverse(nNonceFound);
3003 assert(hash == pblock->GetHash());
3005 SetThreadPriority(THREAD_PRIORITY_NORMAL);
3006 CheckWork(pblock.get(), *pwalletMain, reservekey);
3007 SetThreadPriority(THREAD_PRIORITY_LOWEST);
3013 static int64 nHashCounter;
3014 if (nHPSTimerStart == 0)
3016 nHPSTimerStart = GetTimeMillis();
3020 nHashCounter += nHashesDone;
3021 if (GetTimeMillis() - nHPSTimerStart > 4000)
3023 static CCriticalSection cs;
3026 if (GetTimeMillis() - nHPSTimerStart > 4000)
3028 dHashesPerSec = 1000.0 * nHashCounter / (GetTimeMillis() - nHPSTimerStart);
3029 nHPSTimerStart = GetTimeMillis();
3031 string strStatus = strprintf(" %.0f khash/s", dHashesPerSec/1000.0);
3032 UIThreadCall(boost::bind(CalledSetStatusBar, strStatus, 0));
3033 static int64 nLogTime;
3034 if (GetTime() - nLogTime > 30 * 60)
3036 nLogTime = GetTime();
3037 printf("%s ", DateTimeStrFormat("%x %H:%M", GetTime()).c_str());
3038 printf("hashmeter %3d CPUs %6.0f khash/s\n", vnThreadsRunning[3], dHashesPerSec/1000.0);
3044 // Check for stop or if block needs to be rebuilt
3047 if (!fGenerateBitcoins)
3049 if (fLimitProcessors && vnThreadsRunning[3] > nLimitProcessors)
3053 if (nBlockNonce >= 0xffff0000)
3055 if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60)
3057 if (pindexPrev != pindexBest)
3060 // Update nTime every few seconds
3061 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
3062 nBlockTime = ByteReverse(pblock->nTime);
3067 void static ThreadBitcoinMiner(void* parg)
3069 CWallet* pwallet = (CWallet*)parg;
3072 vnThreadsRunning[3]++;
3073 BitcoinMiner(pwallet);
3074 vnThreadsRunning[3]--;
3076 catch (std::exception& e) {
3077 vnThreadsRunning[3]--;
3078 PrintException(&e, "ThreadBitcoinMiner()");
3080 vnThreadsRunning[3]--;
3081 PrintException(NULL, "ThreadBitcoinMiner()");
3083 UIThreadCall(boost::bind(CalledSetStatusBar, "", 0));
3085 if (vnThreadsRunning[3] == 0)
3087 printf("ThreadBitcoinMiner exiting, %d threads remaining\n", vnThreadsRunning[3]);
3091 void GenerateBitcoins(bool fGenerate, CWallet* pwallet)
3093 if (fGenerateBitcoins != fGenerate)
3095 fGenerateBitcoins = fGenerate;
3096 WriteSetting("fGenerateBitcoins", fGenerateBitcoins);
3099 if (fGenerateBitcoins)
3101 int nProcessors = boost::thread::hardware_concurrency();
3102 printf("%d processors\n", nProcessors);
3103 if (nProcessors < 1)
3105 if (fLimitProcessors && nProcessors > nLimitProcessors)
3106 nProcessors = nLimitProcessors;
3107 int nAddThreads = nProcessors - vnThreadsRunning[3];
3108 printf("Starting %d BitcoinMiner threads\n", nAddThreads);
3109 for (int i = 0; i < nAddThreads; i++)
3111 if (!CreateThread(ThreadBitcoinMiner, pwallet))
3112 printf("Error: CreateThread(ThreadBitcoinMiner) failed\n");