1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2012 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
7 #include "checkpoints.h"
11 #include "ui_interface.h"
13 #include "scrypt_mine.h"
14 #include <boost/algorithm/string/replace.hpp>
15 #include <boost/filesystem.hpp>
16 #include <boost/filesystem/fstream.hpp>
19 using namespace boost;
25 CCriticalSection cs_setpwalletRegistered;
26 set<CWallet*> setpwalletRegistered;
28 CCriticalSection cs_main;
31 unsigned int nTransactionsUpdated = 0;
33 map<uint256, CBlockIndex*> mapBlockIndex;
34 set<pair<COutPoint, unsigned int> > setStakeSeen;
36 CBigNum bnProofOfWorkLimit(~uint256(0) >> 20); // "standard" scrypt target limit for proof of work, results with 0,000244140625 proof-of-work difficulty
37 CBigNum bnProofOfStakeLegacyLimit(~uint256(0) >> 24); // proof of stake target limit from block #15000 and until 20 June 2013, results with 0,00390625 proof of stake difficulty
38 CBigNum bnProofOfStakeLimit(~uint256(0) >> 27); // proof of stake target limit since 20 June 2013, equal to 0.03125 proof of stake difficulty
39 CBigNum bnProofOfStakeHardLimit(~uint256(0) >> 30); // disabled temporarily, will be used in the future to fix minimal proof of stake difficulty at 0.25
40 CBigNum bnPoWBase = CBigNum(uint256("0x00000000ffff0000000000000000000000000000000000000000000000000000")); // difficulty-1 target
42 CBigNum bnProofOfWorkLimitTestNet(~uint256(0) >> 16);
44 unsigned int nStakeMinAge = 60 * 60 * 24 * 30; // 30 days as minimum age for coin age
45 unsigned int nStakeMaxAge = 60 * 60 * 24 * 90; // 90 days as stake age of full weight
46 unsigned int nStakeTargetSpacing = 10 * 60; // 10-minute stakes spacing
47 unsigned int nModifierInterval = 6 * 60 * 60; // time to elapse before new modifier is computed
49 int nCoinbaseMaturity = 500;
50 CBlockIndex* pindexGenesisBlock = NULL;
52 CBigNum bnBestChainTrust = 0;
53 CBigNum bnBestInvalidTrust = 0;
54 uint256 hashBestChain = 0;
55 CBlockIndex* pindexBest = NULL;
56 int64 nTimeBestReceived = 0;
58 CMedianFilter<int> cPeerBlockCounts(5, 0); // Amount of blocks that other nodes claim to have
60 map<uint256, CBlock*> mapOrphanBlocks;
61 multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
62 set<pair<COutPoint, unsigned int> > setStakeSeenOrphan;
63 map<uint256, uint256> mapProofOfStake;
65 map<uint256, CDataStream*> mapOrphanTransactions;
66 map<uint256, map<uint256, CDataStream*> > mapOrphanTransactionsByPrev;
68 // Constant stuff for coinbase transactions we create:
69 CScript COINBASE_FLAGS;
71 const string strMessageMagic = "NovaCoin Signed Message:\n";
77 int64 nTransactionFee = MIN_TX_FEE;
80 //////////////////////////////////////////////////////////////////////////////
82 // dispatching functions
85 // These functions dispatch to one or all registered wallets
88 void RegisterWallet(CWallet* pwalletIn)
91 LOCK(cs_setpwalletRegistered);
92 setpwalletRegistered.insert(pwalletIn);
96 void UnregisterWallet(CWallet* pwalletIn)
99 LOCK(cs_setpwalletRegistered);
100 setpwalletRegistered.erase(pwalletIn);
104 // check whether the passed transaction is from us
105 bool static IsFromMe(CTransaction& tx)
107 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
108 if (pwallet->IsFromMe(tx))
113 // get the wallet transaction with the given hash (if it exists)
114 bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
116 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
117 if (pwallet->GetTransaction(hashTx,wtx))
122 // erases transaction with the given hash from all wallets
123 void static EraseFromWallets(uint256 hash)
125 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
126 pwallet->EraseFromWallet(hash);
129 // make sure all wallets know about the given transaction, in the given block
130 void SyncWithWallets(const CTransaction& tx, const CBlock* pblock, bool fUpdate, bool fConnect)
134 // ppcoin: wallets need to refund inputs when disconnecting coinstake
135 if (tx.IsCoinStake())
137 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
138 if (pwallet->IsFromMe(tx))
139 pwallet->DisableTransaction(tx);
144 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
145 pwallet->AddToWalletIfInvolvingMe(tx, pblock, fUpdate);
148 // notify wallets about a new best chain
149 void static SetBestChain(const CBlockLocator& loc)
151 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
152 pwallet->SetBestChain(loc);
155 // notify wallets about an updated transaction
156 void static UpdatedTransaction(const uint256& hashTx)
158 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
159 pwallet->UpdatedTransaction(hashTx);
163 void static PrintWallets(const CBlock& block)
165 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
166 pwallet->PrintWallet(block);
169 // notify wallets about an incoming inventory (for request counts)
170 void static Inventory(const uint256& hash)
172 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
173 pwallet->Inventory(hash);
176 // ask wallets to resend their transactions
177 void ResendWalletTransactions()
179 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
180 pwallet->ResendWalletTransactions();
189 //////////////////////////////////////////////////////////////////////////////
191 // mapOrphanTransactions
194 bool AddOrphanTx(const CDataStream& vMsg)
197 CDataStream(vMsg) >> tx;
198 uint256 hash = tx.GetHash();
199 if (mapOrphanTransactions.count(hash))
202 CDataStream* pvMsg = new CDataStream(vMsg);
204 // Ignore big transactions, to avoid a
205 // send-big-orphans memory exhaustion attack. If a peer has a legitimate
206 // large transaction with a missing parent then we assume
207 // it will rebroadcast it later, after the parent transaction(s)
208 // have been mined or received.
209 // 10,000 orphans, each of which is at most 5,000 bytes big is
210 // at most 500 megabytes of orphans:
211 if (pvMsg->size() > 5000)
213 printf("ignoring large orphan tx (size: %"PRIszu", hash: %s)\n", pvMsg->size(), hash.ToString().substr(0,10).c_str());
218 mapOrphanTransactions[hash] = pvMsg;
219 BOOST_FOREACH(const CTxIn& txin, tx.vin)
220 mapOrphanTransactionsByPrev[txin.prevout.hash].insert(make_pair(hash, pvMsg));
222 printf("stored orphan tx %s (mapsz %"PRIszu")\n", hash.ToString().substr(0,10).c_str(),
223 mapOrphanTransactions.size());
227 void static EraseOrphanTx(uint256 hash)
229 if (!mapOrphanTransactions.count(hash))
231 const CDataStream* pvMsg = mapOrphanTransactions[hash];
233 CDataStream(*pvMsg) >> tx;
234 BOOST_FOREACH(const CTxIn& txin, tx.vin)
236 mapOrphanTransactionsByPrev[txin.prevout.hash].erase(hash);
237 if (mapOrphanTransactionsByPrev[txin.prevout.hash].empty())
238 mapOrphanTransactionsByPrev.erase(txin.prevout.hash);
241 mapOrphanTransactions.erase(hash);
244 unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
246 unsigned int nEvicted = 0;
247 while (mapOrphanTransactions.size() > nMaxOrphans)
249 // Evict a random orphan:
250 uint256 randomhash = GetRandHash();
251 map<uint256, CDataStream*>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
252 if (it == mapOrphanTransactions.end())
253 it = mapOrphanTransactions.begin();
254 EraseOrphanTx(it->first);
266 //////////////////////////////////////////////////////////////////////////////
268 // CTransaction and CTxIndex
271 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout, CTxIndex& txindexRet)
274 if (!txdb.ReadTxIndex(prevout.hash, txindexRet))
276 if (!ReadFromDisk(txindexRet.pos))
278 if (prevout.n >= vout.size())
286 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout)
289 return ReadFromDisk(txdb, prevout, txindex);
292 bool CTransaction::ReadFromDisk(COutPoint prevout)
296 return ReadFromDisk(txdb, prevout, txindex);
299 bool CTransaction::IsStandard() const
301 if (nVersion > CTransaction::CURRENT_VERSION)
304 BOOST_FOREACH(const CTxIn& txin, vin)
306 // Biggest 'standard' txin is a 3-signature 3-of-3 CHECKMULTISIG
307 // pay-to-script-hash, which is 3 ~80-byte signatures, 3
308 // ~65-byte public keys, plus a few script ops.
309 if (txin.scriptSig.size() > 500)
311 if (!txin.scriptSig.IsPushOnly())
314 BOOST_FOREACH(const CTxOut& txout, vout) {
315 if (!::IsStandard(txout.scriptPubKey))
317 if (txout.nValue == 0)
324 // Check transaction inputs, and make sure any
325 // pay-to-script-hash transactions are evaluating IsStandard scripts
327 // Why bother? To avoid denial-of-service attacks; an attacker
328 // can submit a standard HASH... OP_EQUAL transaction,
329 // which will get accepted into blocks. The redemption
330 // script can be anything; an attacker could use a very
331 // expensive-to-check-upon-redemption script like:
332 // DUP CHECKSIG DROP ... repeated 100 times... OP_1
334 bool CTransaction::AreInputsStandard(const MapPrevTx& mapInputs) const
337 return true; // Coinbases don't use vin normally
339 for (unsigned int i = 0; i < vin.size(); i++)
341 const CTxOut& prev = GetOutputFor(vin[i], mapInputs);
343 vector<vector<unsigned char> > vSolutions;
344 txnouttype whichType;
345 // get the scriptPubKey corresponding to this input:
346 const CScript& prevScript = prev.scriptPubKey;
347 if (!Solver(prevScript, whichType, vSolutions))
349 int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
350 if (nArgsExpected < 0)
353 // Transactions with extra stuff in their scriptSigs are
354 // non-standard. Note that this EvalScript() call will
355 // be quick, because if there are any operations
356 // beside "push data" in the scriptSig the
357 // IsStandard() call returns false
358 vector<vector<unsigned char> > stack;
359 if (!EvalScript(stack, vin[i].scriptSig, *this, i, 0))
362 if (whichType == TX_SCRIPTHASH)
366 CScript subscript(stack.back().begin(), stack.back().end());
367 vector<vector<unsigned char> > vSolutions2;
368 txnouttype whichType2;
369 if (!Solver(subscript, whichType2, vSolutions2))
371 if (whichType2 == TX_SCRIPTHASH)
375 tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
378 nArgsExpected += tmpExpected;
381 if (stack.size() != (unsigned int)nArgsExpected)
389 CTransaction::GetLegacySigOpCount() const
391 unsigned int nSigOps = 0;
392 BOOST_FOREACH(const CTxIn& txin, vin)
394 nSigOps += txin.scriptSig.GetSigOpCount(false);
396 BOOST_FOREACH(const CTxOut& txout, vout)
398 nSigOps += txout.scriptPubKey.GetSigOpCount(false);
404 int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
416 // Load the block this tx is in
418 if (!CTxDB("r").ReadTxIndex(GetHash(), txindex))
420 if (!blockTmp.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos))
425 // Update the tx's hashBlock
426 hashBlock = pblock->GetHash();
428 // Locate the transaction
429 for (nIndex = 0; nIndex < (int)pblock->vtx.size(); nIndex++)
430 if (pblock->vtx[nIndex] == *(CTransaction*)this)
432 if (nIndex == (int)pblock->vtx.size())
434 vMerkleBranch.clear();
436 printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
440 // Fill in merkle branch
441 vMerkleBranch = pblock->GetMerkleBranch(nIndex);
444 // Is the tx in a block that's in the main chain
445 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
446 if (mi == mapBlockIndex.end())
448 CBlockIndex* pindex = (*mi).second;
449 if (!pindex || !pindex->IsInMainChain())
452 return pindexBest->nHeight - pindex->nHeight + 1;
461 bool CTransaction::CheckTransaction() const
463 // Basic checks that don't depend on any context
465 return DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
467 return DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
469 if (::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
470 return DoS(100, error("CTransaction::CheckTransaction() : size limits failed"));
472 // Check for negative or overflow output values
474 for (unsigned int i = 0; i < vout.size(); i++)
476 const CTxOut& txout = vout[i];
477 if (txout.IsEmpty() && !IsCoinBase() && !IsCoinStake())
478 return DoS(100, error("CTransaction::CheckTransaction() : txout empty for user transaction"));
480 // NovaCoin: enforce minimum output amount for user transactions
481 // (and for all transactions until 20 Sep 2013)
482 if ((!IsCoinBase() || nTime < CHAINCHECKS_SWITCH_TIME)
483 && (!txout.IsEmpty()) && txout.nValue < MIN_TXOUT_AMOUNT)
484 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue below minimum"));
486 if (txout.nValue > MAX_MONEY)
487 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
488 nValueOut += txout.nValue;
489 if (!MoneyRange(nValueOut))
490 return DoS(100, error("CTransaction::CheckTransaction() : txout total out of range"));
493 // Check for duplicate inputs
494 set<COutPoint> vInOutPoints;
495 BOOST_FOREACH(const CTxIn& txin, vin)
497 if (vInOutPoints.count(txin.prevout))
499 vInOutPoints.insert(txin.prevout);
504 if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
505 return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size is invalid"));
509 BOOST_FOREACH(const CTxIn& txin, vin)
510 if (txin.prevout.IsNull())
511 return DoS(10, error("CTransaction::CheckTransaction() : prevout is null"));
517 int64 CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree,
518 enum GetMinFee_mode mode) const
520 // Base fee is either MIN_TX_FEE or MIN_RELAY_TX_FEE
521 int64 nBaseFee = (mode == GMF_RELAY) ? MIN_RELAY_TX_FEE : MIN_TX_FEE;
523 unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION);
524 unsigned int nNewBlockSize = nBlockSize + nBytes;
525 int64 nMinFee = (1 + (int64)nBytes / 1000) * nBaseFee;
527 // To limit dust spam, require MIN_TX_FEE/MIN_RELAY_TX_FEE if any output is less than 0.01
528 if (nMinFee < nBaseFee)
530 BOOST_FOREACH(const CTxOut& txout, vout)
531 if (txout.nValue < CENT)
535 // Raise the price as the block approaches full
536 if (nBlockSize != 1 && nNewBlockSize >= MAX_BLOCK_SIZE_GEN/2)
538 if (nNewBlockSize >= MAX_BLOCK_SIZE_GEN)
540 nMinFee *= MAX_BLOCK_SIZE_GEN / (MAX_BLOCK_SIZE_GEN - nNewBlockSize);
543 if (!MoneyRange(nMinFee))
549 bool CTxMemPool::accept(CTxDB& txdb, CTransaction &tx, bool fCheckInputs,
550 bool* pfMissingInputs)
553 *pfMissingInputs = false;
555 if (!tx.CheckTransaction())
556 return error("CTxMemPool::accept() : CheckTransaction failed");
558 // Coinbase is only valid in a block, not as a loose transaction
560 return tx.DoS(100, error("CTxMemPool::accept() : coinbase as individual tx"));
562 // ppcoin: coinstake is also only valid in a block, not as a loose transaction
563 if (tx.IsCoinStake())
564 return tx.DoS(100, error("CTxMemPool::accept() : coinstake as individual tx"));
566 // To help v0.1.5 clients who would see it as a negative number
567 if ((int64)tx.nLockTime > std::numeric_limits<int>::max())
568 return error("CTxMemPool::accept() : not accepting nLockTime beyond 2038 yet");
570 // Rather not work on nonstandard transactions (unless -testnet)
571 if (!fTestNet && !tx.IsStandard())
572 return error("CTxMemPool::accept() : nonstandard transaction type");
574 // Do we already have it?
575 uint256 hash = tx.GetHash();
578 if (mapTx.count(hash))
582 if (txdb.ContainsTx(hash))
585 // Check for conflicts with in-memory transactions
586 CTransaction* ptxOld = NULL;
587 for (unsigned int i = 0; i < tx.vin.size(); i++)
589 COutPoint outpoint = tx.vin[i].prevout;
590 if (mapNextTx.count(outpoint))
592 // Disable replacement feature for now
595 // Allow replacing with a newer version of the same transaction
598 ptxOld = mapNextTx[outpoint].ptx;
599 if (ptxOld->IsFinal())
601 if (!tx.IsNewerThan(*ptxOld))
603 for (unsigned int i = 0; i < tx.vin.size(); i++)
605 COutPoint outpoint = tx.vin[i].prevout;
606 if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
616 map<uint256, CTxIndex> mapUnused;
617 bool fInvalid = false;
618 if (!tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
621 return error("CTxMemPool::accept() : FetchInputs found invalid tx %s", hash.ToString().substr(0,10).c_str());
623 *pfMissingInputs = true;
627 // Check for non-standard pay-to-script-hash in inputs
628 if (!tx.AreInputsStandard(mapInputs) && !fTestNet)
629 return error("CTxMemPool::accept() : nonstandard transaction input");
631 // Note: if you modify this code to accept non-standard transactions, then
632 // you should add code here to check that the transaction does a
633 // reasonable number of ECDSA signature verifications.
635 int64 nFees = tx.GetValueIn(mapInputs)-tx.GetValueOut();
636 unsigned int nSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
638 // Don't accept it if it can't get into a block
639 int64 txMinFee = tx.GetMinFee(1000, false, GMF_RELAY);
640 if (nFees < txMinFee)
641 return error("CTxMemPool::accept() : not enough fees %s, %"PRI64d" < %"PRI64d,
642 hash.ToString().c_str(),
645 // Continuously rate-limit free transactions
646 // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
647 // be annoying or make others' transactions take longer to confirm.
648 if (nFees < MIN_RELAY_TX_FEE)
650 static CCriticalSection cs;
651 static double dFreeCount;
652 static int64 nLastTime;
653 int64 nNow = GetTime();
657 // Use an exponentially decaying ~10-minute window:
658 dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
660 // -limitfreerelay unit is thousand-bytes-per-minute
661 // At default rate it would take over a month to fill 1GB
662 if (dFreeCount > GetArg("-limitfreerelay", 15)*10*1000 && !IsFromMe(tx))
663 return error("CTxMemPool::accept() : free transaction rejected by rate limiter");
665 printf("Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
670 // Check against previous transactions
671 // This is done last to help prevent CPU exhaustion denial-of-service attacks.
672 if (!tx.ConnectInputs(txdb, mapInputs, mapUnused, CDiskTxPos(1,1,1), pindexBest, false, false))
674 return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
678 // Store transaction in memory
683 printf("CTxMemPool::accept() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
686 addUnchecked(hash, tx);
689 ///// are we sure this is ok when loading transactions or restoring block txes
690 // If updated, erase old tx from wallet
692 EraseFromWallets(ptxOld->GetHash());
694 printf("CTxMemPool::accept() : accepted %s (poolsz %"PRIszu")\n",
695 hash.ToString().substr(0,10).c_str(),
700 bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMissingInputs)
702 return mempool.accept(txdb, *this, fCheckInputs, pfMissingInputs);
705 bool CTxMemPool::addUnchecked(const uint256& hash, CTransaction &tx)
707 // Add to memory pool without checking anything. Don't call this directly,
708 // call CTxMemPool::accept to properly check the transaction first.
711 for (unsigned int i = 0; i < tx.vin.size(); i++)
712 mapNextTx[tx.vin[i].prevout] = CInPoint(&mapTx[hash], i);
713 nTransactionsUpdated++;
719 bool CTxMemPool::remove(CTransaction &tx)
721 // Remove transaction from memory pool
724 uint256 hash = tx.GetHash();
725 if (mapTx.count(hash))
727 BOOST_FOREACH(const CTxIn& txin, tx.vin)
728 mapNextTx.erase(txin.prevout);
730 nTransactionsUpdated++;
736 void CTxMemPool::clear()
741 ++nTransactionsUpdated;
744 void CTxMemPool::queryHashes(std::vector<uint256>& vtxid)
749 vtxid.reserve(mapTx.size());
750 for (map<uint256, CTransaction>::iterator mi = mapTx.begin(); mi != mapTx.end(); ++mi)
751 vtxid.push_back((*mi).first);
757 int CMerkleTx::GetDepthInMainChain(CBlockIndex* &pindexRet) const
759 if (hashBlock == 0 || nIndex == -1)
762 // Find the block it claims to be in
763 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
764 if (mi == mapBlockIndex.end())
766 CBlockIndex* pindex = (*mi).second;
767 if (!pindex || !pindex->IsInMainChain())
770 // Make sure the merkle branch connects to this block
771 if (!fMerkleVerified)
773 if (CBlock::CheckMerkleBranch(GetHash(), vMerkleBranch, nIndex) != pindex->hashMerkleRoot)
775 fMerkleVerified = true;
779 return pindexBest->nHeight - pindex->nHeight + 1;
783 int CMerkleTx::GetBlocksToMaturity() const
785 if (!(IsCoinBase() || IsCoinStake()))
787 return max(0, (nCoinbaseMaturity+20) - GetDepthInMainChain());
791 bool CMerkleTx::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs)
795 if (!IsInMainChain() && !ClientConnectInputs())
797 return CTransaction::AcceptToMemoryPool(txdb, false);
801 return CTransaction::AcceptToMemoryPool(txdb, fCheckInputs);
805 bool CMerkleTx::AcceptToMemoryPool()
808 return AcceptToMemoryPool(txdb);
813 bool CWalletTx::AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs)
818 // Add previous supporting transactions first
819 BOOST_FOREACH(CMerkleTx& tx, vtxPrev)
821 if (!(tx.IsCoinBase() || tx.IsCoinStake()))
823 uint256 hash = tx.GetHash();
824 if (!mempool.exists(hash) && !txdb.ContainsTx(hash))
825 tx.AcceptToMemoryPool(txdb, fCheckInputs);
828 return AcceptToMemoryPool(txdb, fCheckInputs);
833 bool CWalletTx::AcceptWalletTransaction()
836 return AcceptWalletTransaction(txdb);
839 int CTxIndex::GetDepthInMainChain() const
843 if (!block.ReadFromDisk(pos.nFile, pos.nBlockPos, false))
845 // Find the block in the index
846 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(block.GetHash());
847 if (mi == mapBlockIndex.end())
849 CBlockIndex* pindex = (*mi).second;
850 if (!pindex || !pindex->IsInMainChain())
852 return 1 + nBestHeight - pindex->nHeight;
855 // Return transaction in tx, and if it was found inside a block, its hash is placed in hashBlock
856 bool GetTransaction(const uint256 &hash, CTransaction &tx, uint256 &hashBlock)
862 if (mempool.exists(hash))
864 tx = mempool.lookup(hash);
870 if (tx.ReadFromDisk(txdb, COutPoint(hash, 0), txindex))
873 if (block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
874 hashBlock = block.GetHash();
888 //////////////////////////////////////////////////////////////////////////////
890 // CBlock and CBlockIndex
893 static CBlockIndex* pblockindexFBBHLast;
894 CBlockIndex* FindBlockByHeight(int nHeight)
896 CBlockIndex *pblockindex;
897 if (nHeight < nBestHeight / 2)
898 pblockindex = pindexGenesisBlock;
900 pblockindex = pindexBest;
901 if (pblockindexFBBHLast && abs(nHeight - pblockindex->nHeight) > abs(nHeight - pblockindexFBBHLast->nHeight))
902 pblockindex = pblockindexFBBHLast;
903 while (pblockindex->nHeight > nHeight)
904 pblockindex = pblockindex->pprev;
905 while (pblockindex->nHeight < nHeight)
906 pblockindex = pblockindex->pnext;
907 pblockindexFBBHLast = pblockindex;
911 bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
913 if (!fReadTransactions)
915 *this = pindex->GetBlockHeader();
918 if (!ReadFromDisk(pindex->nFile, pindex->nBlockPos, fReadTransactions))
920 if (GetHash() != pindex->GetBlockHash())
921 return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
925 uint256 static GetOrphanRoot(const CBlock* pblock)
927 // Work back to the first block in the orphan chain
928 while (mapOrphanBlocks.count(pblock->hashPrevBlock))
929 pblock = mapOrphanBlocks[pblock->hashPrevBlock];
930 return pblock->GetHash();
933 // ppcoin: find block wanted by given orphan block
934 uint256 WantedByOrphan(const CBlock* pblockOrphan)
936 // Work back to the first block in the orphan chain
937 while (mapOrphanBlocks.count(pblockOrphan->hashPrevBlock))
938 pblockOrphan = mapOrphanBlocks[pblockOrphan->hashPrevBlock];
939 return pblockOrphan->hashPrevBlock;
942 // select stake target limit according to hard-coded conditions
943 CBigNum static GetProofOfStakeLimit(int nHeight, unsigned int nTime)
945 if(fTestNet) // separate proof of stake target limit for testnet
946 return bnProofOfStakeLimit;
947 if(nTime > TARGETS_SWITCH_TIME) // 27 bits since 20 July 2013
948 return bnProofOfStakeLimit;
949 if(nHeight + 1 > 15000) // 24 bits since block 15000
950 return bnProofOfStakeLegacyLimit;
951 if(nHeight + 1 > 14060) // 31 bits since block 14060 until 15000
952 return bnProofOfStakeHardLimit;
954 return bnProofOfWorkLimit; // return bnProofOfWorkLimit of none matched
957 // miner's coin base reward based on nBits
958 int64 GetProofOfWorkReward(unsigned int nBits)
960 CBigNum bnSubsidyLimit = MAX_MINT_PROOF_OF_WORK;
963 bnTarget.SetCompact(nBits);
964 CBigNum bnTargetLimit = bnProofOfWorkLimit;
965 bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());
967 // NovaCoin: subsidy is cut in half every 64x multiply of PoW difficulty
968 // A reasonably continuous curve is used to avoid shock to market
969 // (nSubsidyLimit / nSubsidy) ** 6 == bnProofOfWorkLimit / bnTarget
971 // Human readable form:
973 // nSubsidy = 100 / (diff ^ 1/6)
974 CBigNum bnLowerBound = CENT;
975 CBigNum bnUpperBound = bnSubsidyLimit;
976 while (bnLowerBound + CENT <= bnUpperBound)
978 CBigNum bnMidValue = (bnLowerBound + bnUpperBound) / 2;
979 if (fDebug && GetBoolArg("-printcreation"))
980 printf("GetProofOfWorkReward() : lower=%"PRI64d" upper=%"PRI64d" mid=%"PRI64d"\n", bnLowerBound.getuint64(), bnUpperBound.getuint64(), bnMidValue.getuint64());
981 if (bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnTargetLimit > bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnTarget)
982 bnUpperBound = bnMidValue;
984 bnLowerBound = bnMidValue;
987 int64 nSubsidy = bnUpperBound.getuint64();
989 nSubsidy = (nSubsidy / CENT) * CENT;
990 if (fDebug && GetBoolArg("-printcreation"))
991 printf("GetProofOfWorkReward() : create=%s nBits=0x%08x nSubsidy=%"PRI64d"\n", FormatMoney(nSubsidy).c_str(), nBits, nSubsidy);
993 return min(nSubsidy, MAX_MINT_PROOF_OF_WORK);
996 // miner's coin stake reward based on nBits and coin age spent (coin-days)
997 int64 GetProofOfStakeReward(int64 nCoinAge, unsigned int nBits, unsigned int nTime)
999 int64 nRewardCoinYear;
1001 if(fTestNet || nTime > STAKE_SWITCH_TIME)
1003 // Stage 2 of emission process is PoS-based. It will be active on mainNet since 20 Jun 2013.
1005 CBigNum bnRewardCoinYearLimit = MAX_MINT_PROOF_OF_STAKE; // Base stake mint rate, 100% year interest
1007 bnTarget.SetCompact(nBits);
1008 CBigNum bnTargetLimit = GetProofOfStakeLimit(0, nTime);
1009 bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());
1011 // NovaCoin: reward for coin-year is cut in half every 64x multiply of PoS difficulty
1012 // A reasonably continuous curve is used to avoid shock to market
1013 // (nRewardCoinYearLimit / nRewardCoinYear) ** 6 == bnProofOfStakeLimit / bnTarget
1015 // Human readable form:
1017 // nRewardCoinYear = 1 / (posdiff ^ 1/6)
1019 CBigNum bnLowerBound = 1 * CENT; // Lower interest bound is 1% per year
1020 CBigNum bnUpperBound = bnRewardCoinYearLimit;
1021 while (bnLowerBound + CENT <= bnUpperBound)
1023 CBigNum bnMidValue = (bnLowerBound + bnUpperBound) / 2;
1024 if (fDebug && GetBoolArg("-printcreation"))
1025 printf("GetProofOfStakeReward() : lower=%"PRI64d" upper=%"PRI64d" mid=%"PRI64d"\n", bnLowerBound.getuint64(), bnUpperBound.getuint64(), bnMidValue.getuint64());
1026 if (bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnTargetLimit > bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnTarget)
1027 bnUpperBound = bnMidValue;
1029 bnLowerBound = bnMidValue;
1032 nRewardCoinYear = bnUpperBound.getuint64();
1033 nRewardCoinYear = min((nRewardCoinYear / CENT) * CENT, MAX_MINT_PROOF_OF_STAKE);
1037 // Old creation amount per coin-year, 5% fixed stake mint rate
1038 nRewardCoinYear = 5 * CENT;
1041 int64 nSubsidy = nCoinAge * 33 / (365 * 33 + 8) * nRewardCoinYear;
1042 if (fDebug && GetBoolArg("-printcreation"))
1043 printf("GetProofOfStakeReward(): create=%s nCoinAge=%"PRI64d" nBits=%d\n", FormatMoney(nSubsidy).c_str(), nCoinAge, nBits);
1047 static const int64 nTargetTimespan = 7 * 24 * 60 * 60; // one week
1049 // get proof of work blocks max spacing according to hard-coded conditions
1050 int64 static GetTargetSpacingWorkMax(int nHeight, unsigned int nTime)
1052 if(nTime > TARGETS_SWITCH_TIME)
1053 return 3 * nStakeTargetSpacing; // 30 minutes on mainNet since 20 Jul 2013 00:00:00
1056 return 3 * nStakeTargetSpacing; // 15 minutes on testNet
1058 return 12 * nStakeTargetSpacing; // 2 hours otherwise
1062 // minimum amount of work that could possibly be required nTime after
1063 // minimum work required was nBase
1065 unsigned int ComputeMinWork(unsigned int nBase, int64 nTime)
1067 CBigNum bnTargetLimit = bnProofOfWorkLimit;
1070 bnResult.SetCompact(nBase);
1072 while (nTime > 0 && bnResult < bnTargetLimit)
1074 // Maximum 200% adjustment per day...
1076 nTime -= 24 * 60 * 60;
1078 if (bnResult > bnTargetLimit)
1079 bnResult = bnTargetLimit;
1080 return bnResult.GetCompact();
1083 // ppcoin: find last block index up to pindex
1084 const CBlockIndex* GetLastBlockIndex(const CBlockIndex* pindex, bool fProofOfStake)
1086 while (pindex && pindex->pprev && (pindex->IsProofOfStake() != fProofOfStake))
1087 pindex = pindex->pprev;
1091 unsigned int GetNextTargetRequired(const CBlockIndex* pindexLast, bool fProofOfStake)
1093 CBigNum bnTargetLimit = !fProofOfStake ? bnProofOfWorkLimit : GetProofOfStakeLimit(pindexLast->nHeight, pindexLast->nTime);
1095 if (pindexLast == NULL)
1096 return bnTargetLimit.GetCompact(); // genesis block
1098 const CBlockIndex* pindexPrev = GetLastBlockIndex(pindexLast, fProofOfStake);
1099 if (pindexPrev->pprev == NULL)
1100 return bnTargetLimit.GetCompact(); // first block
1101 const CBlockIndex* pindexPrevPrev = GetLastBlockIndex(pindexPrev->pprev, fProofOfStake);
1102 if (pindexPrevPrev->pprev == NULL)
1103 return bnTargetLimit.GetCompact(); // second block
1105 int64 nActualSpacing = pindexPrev->GetBlockTime() - pindexPrevPrev->GetBlockTime();
1107 // ppcoin: target change every block
1108 // ppcoin: retarget with exponential moving toward target spacing
1110 bnNew.SetCompact(pindexPrev->nBits);
1111 int64 nTargetSpacing = fProofOfStake? nStakeTargetSpacing : min(GetTargetSpacingWorkMax(pindexLast->nHeight, pindexLast->nTime), (int64) nStakeTargetSpacing * (1 + pindexLast->nHeight - pindexPrev->nHeight));
1112 int64 nInterval = nTargetTimespan / nTargetSpacing;
1113 bnNew *= ((nInterval - 1) * nTargetSpacing + nActualSpacing + nActualSpacing);
1114 bnNew /= ((nInterval + 1) * nTargetSpacing);
1116 if (bnNew > bnTargetLimit)
1117 bnNew = bnTargetLimit;
1119 return bnNew.GetCompact();
1122 bool CheckProofOfWork(uint256 hash, unsigned int nBits)
1125 bnTarget.SetCompact(nBits);
1128 if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
1129 return error("CheckProofOfWork() : nBits below minimum work");
1131 // Check proof of work matches claimed amount
1132 if (hash > bnTarget.getuint256())
1133 return error("CheckProofOfWork() : hash doesn't match nBits");
1138 // Return maximum amount of blocks that other nodes claim to have
1139 int GetNumBlocksOfPeers()
1141 return std::max(cPeerBlockCounts.median(), Checkpoints::GetTotalBlocksEstimate());
1144 bool IsInitialBlockDownload()
1146 if (pindexBest == NULL || nBestHeight < Checkpoints::GetTotalBlocksEstimate())
1148 static int64 nLastUpdate;
1149 static CBlockIndex* pindexLastBest;
1150 if (pindexBest != pindexLastBest)
1152 pindexLastBest = pindexBest;
1153 nLastUpdate = GetTime();
1155 return (GetTime() - nLastUpdate < 10 &&
1156 pindexBest->GetBlockTime() < GetTime() - 24 * 60 * 60);
1159 void static InvalidChainFound(CBlockIndex* pindexNew)
1161 if (pindexNew->bnChainTrust > bnBestInvalidTrust)
1163 bnBestInvalidTrust = pindexNew->bnChainTrust;
1164 CTxDB().WriteBestInvalidTrust(bnBestInvalidTrust);
1165 uiInterface.NotifyBlocksChanged();
1168 CBigNum bnBestInvalidBlockTrust = pindexNew->bnChainTrust - pindexNew->pprev->bnChainTrust;
1169 CBigNum bnBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->bnChainTrust - pindexBest->pprev->bnChainTrust) : pindexBest->bnChainTrust;
1171 printf("InvalidChainFound: invalid block=%s height=%d trust=%s blocktrust=%s date=%s\n",
1172 pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight,
1173 pindexNew->bnChainTrust.ToString().c_str(), bnBestInvalidBlockTrust.ToString().c_str(),
1174 DateTimeStrFormat("%x %H:%M:%S", pindexNew->GetBlockTime()).c_str());
1175 printf("InvalidChainFound: current best=%s height=%d trust=%s blocktrust=%s date=%s\n",
1176 hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
1177 bnBestChainTrust.ToString().c_str(),
1178 bnBestBlockTrust.ToString().c_str(),
1179 DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
1183 void CBlock::UpdateTime(const CBlockIndex* pindexPrev)
1185 nTime = max(GetBlockTime(), GetAdjustedTime());
1198 bool CTransaction::DisconnectInputs(CTxDB& txdb)
1200 // Relinquish previous transactions' spent pointers
1203 BOOST_FOREACH(const CTxIn& txin, vin)
1205 COutPoint prevout = txin.prevout;
1207 // Get prev txindex from disk
1209 if (!txdb.ReadTxIndex(prevout.hash, txindex))
1210 return error("DisconnectInputs() : ReadTxIndex failed");
1212 if (prevout.n >= txindex.vSpent.size())
1213 return error("DisconnectInputs() : prevout.n out of range");
1215 // Mark outpoint as not spent
1216 txindex.vSpent[prevout.n].SetNull();
1219 if (!txdb.UpdateTxIndex(prevout.hash, txindex))
1220 return error("DisconnectInputs() : UpdateTxIndex failed");
1224 // Remove transaction from index
1225 // This can fail if a duplicate of this transaction was in a chain that got
1226 // reorganized away. This is only possible if this transaction was completely
1227 // spent, so erasing it would be a no-op anyway.
1228 txdb.EraseTxIndex(*this);
1234 bool CTransaction::FetchInputs(CTxDB& txdb, const map<uint256, CTxIndex>& mapTestPool,
1235 bool fBlock, bool fMiner, MapPrevTx& inputsRet, bool& fInvalid)
1237 // FetchInputs can return false either because we just haven't seen some inputs
1238 // (in which case the transaction should be stored as an orphan)
1239 // or because the transaction is malformed (in which case the transaction should
1240 // be dropped). If tx is definitely invalid, fInvalid will be set to true.
1244 return true; // Coinbase transactions have no inputs to fetch.
1246 for (unsigned int i = 0; i < vin.size(); i++)
1248 COutPoint prevout = vin[i].prevout;
1249 if (inputsRet.count(prevout.hash))
1250 continue; // Got it already
1253 CTxIndex& txindex = inputsRet[prevout.hash].first;
1255 if ((fBlock || fMiner) && mapTestPool.count(prevout.hash))
1257 // Get txindex from current proposed changes
1258 txindex = mapTestPool.find(prevout.hash)->second;
1262 // Read txindex from txdb
1263 fFound = txdb.ReadTxIndex(prevout.hash, txindex);
1265 if (!fFound && (fBlock || fMiner))
1266 return fMiner ? false : error("FetchInputs() : %s prev tx %s index entry not found", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
1269 CTransaction& txPrev = inputsRet[prevout.hash].second;
1270 if (!fFound || txindex.pos == CDiskTxPos(1,1,1))
1272 // Get prev tx from single transactions in memory
1275 if (!mempool.exists(prevout.hash))
1276 return error("FetchInputs() : %s mempool Tx prev not found %s", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
1277 txPrev = mempool.lookup(prevout.hash);
1280 txindex.vSpent.resize(txPrev.vout.size());
1284 // Get prev tx from disk
1285 if (!txPrev.ReadFromDisk(txindex.pos))
1286 return error("FetchInputs() : %s ReadFromDisk prev tx %s failed", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
1290 // Make sure all prevout.n indexes are valid:
1291 for (unsigned int i = 0; i < vin.size(); i++)
1293 const COutPoint prevout = vin[i].prevout;
1294 assert(inputsRet.count(prevout.hash) != 0);
1295 const CTxIndex& txindex = inputsRet[prevout.hash].first;
1296 const CTransaction& txPrev = inputsRet[prevout.hash].second;
1297 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
1299 // Revisit this if/when transaction replacement is implemented and allows
1302 return DoS(100, error("FetchInputs() : %s prevout.n out of range %d %"PRIszu" %"PRIszu" 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()));
1309 const CTxOut& CTransaction::GetOutputFor(const CTxIn& input, const MapPrevTx& inputs) const
1311 MapPrevTx::const_iterator mi = inputs.find(input.prevout.hash);
1312 if (mi == inputs.end())
1313 throw std::runtime_error("CTransaction::GetOutputFor() : prevout.hash not found");
1315 const CTransaction& txPrev = (mi->second).second;
1316 if (input.prevout.n >= txPrev.vout.size())
1317 throw std::runtime_error("CTransaction::GetOutputFor() : prevout.n out of range");
1319 return txPrev.vout[input.prevout.n];
1322 int64 CTransaction::GetValueIn(const MapPrevTx& inputs) const
1328 for (unsigned int i = 0; i < vin.size(); i++)
1330 nResult += GetOutputFor(vin[i], inputs).nValue;
1336 unsigned int CTransaction::GetP2SHSigOpCount(const MapPrevTx& inputs) const
1341 unsigned int nSigOps = 0;
1342 for (unsigned int i = 0; i < vin.size(); i++)
1344 const CTxOut& prevout = GetOutputFor(vin[i], inputs);
1345 if (prevout.scriptPubKey.IsPayToScriptHash())
1346 nSigOps += prevout.scriptPubKey.GetSigOpCount(vin[i].scriptSig);
1351 bool CTransaction::ConnectInputs(CTxDB& txdb, MapPrevTx inputs,
1352 map<uint256, CTxIndex>& mapTestPool, const CDiskTxPos& posThisTx,
1353 const CBlockIndex* pindexBlock, bool fBlock, bool fMiner, bool fStrictPayToScriptHash)
1355 // Take over previous transactions' spent pointers
1356 // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
1357 // fMiner is true when called from the internal bitcoin miner
1358 // ... both are false when called from CTransaction::AcceptToMemoryPool
1363 for (unsigned int i = 0; i < vin.size(); i++)
1365 COutPoint prevout = vin[i].prevout;
1366 assert(inputs.count(prevout.hash) > 0);
1367 CTxIndex& txindex = inputs[prevout.hash].first;
1368 CTransaction& txPrev = inputs[prevout.hash].second;
1370 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
1371 return DoS(100, error("ConnectInputs() : %s prevout.n out of range %d %"PRIszu" %"PRIszu" 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()));
1373 // If prev is coinbase or coinstake, check that it's matured
1374 if (txPrev.IsCoinBase() || txPrev.IsCoinStake())
1375 for (const CBlockIndex* pindex = pindexBlock; pindex && pindexBlock->nHeight - pindex->nHeight < nCoinbaseMaturity; pindex = pindex->pprev)
1376 if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
1377 return error("ConnectInputs() : tried to spend %s at depth %d", txPrev.IsCoinBase() ? "coinbase" : "coinstake", pindexBlock->nHeight - pindex->nHeight);
1379 // ppcoin: check transaction timestamp
1380 if (txPrev.nTime > nTime)
1381 return DoS(100, error("ConnectInputs() : transaction timestamp earlier than input transaction"));
1383 // Check for negative or overflow input values
1384 nValueIn += txPrev.vout[prevout.n].nValue;
1385 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
1386 return DoS(100, error("ConnectInputs() : txin values out of range"));
1389 // The first loop above does all the inexpensive checks.
1390 // Only if ALL inputs pass do we perform expensive ECDSA signature checks.
1391 // Helps prevent CPU exhaustion attacks.
1392 for (unsigned int i = 0; i < vin.size(); i++)
1394 COutPoint prevout = vin[i].prevout;
1395 assert(inputs.count(prevout.hash) > 0);
1396 CTxIndex& txindex = inputs[prevout.hash].first;
1397 CTransaction& txPrev = inputs[prevout.hash].second;
1399 // Check for conflicts (double-spend)
1400 // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
1401 // for an attacker to attempt to split the network.
1402 if (!txindex.vSpent[prevout.n].IsNull())
1403 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());
1405 // Skip ECDSA signature verification when connecting blocks (fBlock=true)
1406 // before the last blockchain checkpoint. This is safe because block merkle hashes are
1407 // still computed and checked, and any change will be caught at the next checkpoint.
1408 if (!(fBlock && (nBestHeight < Checkpoints::GetTotalBlocksEstimate())))
1411 if (!VerifySignature(txPrev, *this, i, fStrictPayToScriptHash, 0))
1413 // only during transition phase for P2SH: do not invoke anti-DoS code for
1414 // potentially old clients relaying bad P2SH transactions
1415 if (fStrictPayToScriptHash && VerifySignature(txPrev, *this, i, false, 0))
1416 return error("ConnectInputs() : %s P2SH VerifySignature failed", GetHash().ToString().substr(0,10).c_str());
1418 return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
1422 // Mark outpoints as spent
1423 txindex.vSpent[prevout.n] = posThisTx;
1426 if (fBlock || fMiner)
1428 mapTestPool[prevout.hash] = txindex;
1434 // ppcoin: coin stake tx earns reward instead of paying fee
1436 if (!GetCoinAge(txdb, nCoinAge))
1437 return error("ConnectInputs() : %s unable to get coin age for coinstake", GetHash().ToString().substr(0,10).c_str());
1438 int64 nStakeReward = GetValueOut() - nValueIn;
1439 if (nStakeReward > GetProofOfStakeReward(nCoinAge, pindexBlock->nBits, nTime) - GetMinFee() + MIN_TX_FEE)
1440 return DoS(100, error("ConnectInputs() : %s stake reward exceeded", GetHash().ToString().substr(0,10).c_str()));
1444 if (nValueIn < GetValueOut())
1445 return DoS(100, error("ConnectInputs() : %s value in < value out", GetHash().ToString().substr(0,10).c_str()));
1447 // Tally transaction fees
1448 int64 nTxFee = nValueIn - GetValueOut();
1450 return DoS(100, error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str()));
1451 // ppcoin: enforce transaction fees for every block
1452 if (nTxFee < GetMinFee())
1453 return fBlock? DoS(100, error("ConnectInputs() : %s not paying required fee=%s, paid=%s", GetHash().ToString().substr(0,10).c_str(), FormatMoney(GetMinFee()).c_str(), FormatMoney(nTxFee).c_str())) : false;
1456 if (!MoneyRange(nFees))
1457 return DoS(100, error("ConnectInputs() : nFees out of range"));
1465 bool CTransaction::ClientConnectInputs()
1470 // Take over previous transactions' spent pointers
1474 for (unsigned int i = 0; i < vin.size(); i++)
1476 // Get prev tx from single transactions in memory
1477 COutPoint prevout = vin[i].prevout;
1478 if (!mempool.exists(prevout.hash))
1480 CTransaction& txPrev = mempool.lookup(prevout.hash);
1482 if (prevout.n >= txPrev.vout.size())
1486 if (!VerifySignature(txPrev, *this, i, true, 0))
1487 return error("ConnectInputs() : VerifySignature failed");
1489 ///// this is redundant with the mempool.mapNextTx stuff,
1490 ///// not sure which I want to get rid of
1491 ///// this has to go away now that posNext is gone
1492 // // Check for conflicts
1493 // if (!txPrev.vout[prevout.n].posNext.IsNull())
1494 // return error("ConnectInputs() : prev tx already used");
1496 // // Flag outpoints as used
1497 // txPrev.vout[prevout.n].posNext = posThisTx;
1499 nValueIn += txPrev.vout[prevout.n].nValue;
1501 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
1502 return error("ClientConnectInputs() : txin values out of range");
1504 if (GetValueOut() > nValueIn)
1514 bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
1516 // Disconnect in reverse order
1517 for (int i = vtx.size()-1; i >= 0; i--)
1518 if (!vtx[i].DisconnectInputs(txdb))
1521 // Update block index on disk without changing it in memory.
1522 // The memory index structure will be changed after the db commits.
1525 CDiskBlockIndex blockindexPrev(pindex->pprev);
1526 blockindexPrev.hashNext = 0;
1527 if (!txdb.WriteBlockIndex(blockindexPrev))
1528 return error("DisconnectBlock() : WriteBlockIndex failed");
1531 // ppcoin: clean up wallet after disconnecting coinstake
1532 BOOST_FOREACH(CTransaction& tx, vtx)
1533 SyncWithWallets(tx, this, false, false);
1538 bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
1540 // Check it again in case a previous version let a bad block in
1541 if (!CheckBlock(!fJustCheck, !fJustCheck))
1544 // Do not allow blocks that contain transactions which 'overwrite' older transactions,
1545 // unless those are already completely spent.
1546 // If such overwrites are allowed, coinbases and transactions depending upon those
1547 // can be duplicated to remove the ability to spend the first instance -- even after
1548 // being sent to another address.
1549 // See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
1550 // This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
1551 // already refuses previously-known transaction ids entirely.
1552 // This rule was originally applied all blocks whose timestamp was after March 15, 2012, 0:00 UTC.
1553 // Now that the whole chain is irreversibly beyond that time it is applied to all blocks except the
1554 // two in the chain that violate it. This prevents exploiting the issue against nodes in their
1555 // initial block download.
1556 bool fEnforceBIP30 = true; // Always active in NovaCoin
1557 bool fStrictPayToScriptHash = true; // Always active in NovaCoin
1559 //// issue here: it doesn't know the version
1560 unsigned int nTxPos;
1562 // FetchInputs treats CDiskTxPos(1,1,1) as a special "refer to memorypool" indicator
1563 // Since we're just checking the block and not actually connecting it, it might not (and probably shouldn't) be on the disk to get the transaction from
1566 nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK, CLIENT_VERSION) - (2 * GetSizeOfCompactSize(0)) + GetSizeOfCompactSize(vtx.size());
1568 map<uint256, CTxIndex> mapQueuedChanges;
1571 int64 nValueOut = 0;
1572 unsigned int nSigOps = 0;
1573 BOOST_FOREACH(CTransaction& tx, vtx)
1575 uint256 hashTx = tx.GetHash();
1577 if (fEnforceBIP30) {
1578 CTxIndex txindexOld;
1579 if (txdb.ReadTxIndex(hashTx, txindexOld)) {
1580 BOOST_FOREACH(CDiskTxPos &pos, txindexOld.vSpent)
1586 nSigOps += tx.GetLegacySigOpCount();
1587 if (nSigOps > MAX_BLOCK_SIGOPS)
1588 return DoS(100, error("ConnectBlock() : too many sigops"));
1590 CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
1592 nTxPos += ::GetSerializeSize(tx, SER_DISK, CLIENT_VERSION);
1594 MapPrevTx mapInputs;
1595 if (tx.IsCoinBase())
1596 nValueOut += tx.GetValueOut();
1600 if (!tx.FetchInputs(txdb, mapQueuedChanges, true, false, mapInputs, fInvalid))
1603 if (fStrictPayToScriptHash)
1605 // Add in sigops done by pay-to-script-hash inputs;
1606 // this is to prevent a "rogue miner" from creating
1607 // an incredibly-expensive-to-validate block.
1608 nSigOps += tx.GetP2SHSigOpCount(mapInputs);
1609 if (nSigOps > MAX_BLOCK_SIGOPS)
1610 return DoS(100, error("ConnectBlock() : too many sigops"));
1613 int64 nTxValueIn = tx.GetValueIn(mapInputs);
1614 int64 nTxValueOut = tx.GetValueOut();
1615 nValueIn += nTxValueIn;
1616 nValueOut += nTxValueOut;
1617 if (!tx.IsCoinStake())
1618 nFees += nTxValueIn - nTxValueOut;
1620 if (!tx.ConnectInputs(txdb, mapInputs, mapQueuedChanges, posThisTx, pindex, true, false, fStrictPayToScriptHash))
1624 mapQueuedChanges[hashTx] = CTxIndex(posThisTx, tx.vout.size());
1627 // ppcoin: track money supply and mint amount info
1628 pindex->nMint = nValueOut - nValueIn + nFees;
1629 pindex->nMoneySupply = (pindex->pprev? pindex->pprev->nMoneySupply : 0) + nValueOut - nValueIn;
1630 if (!txdb.WriteBlockIndex(CDiskBlockIndex(pindex)))
1631 return error("Connect() : WriteBlockIndex for pindex failed");
1633 // ppcoin: fees are not collected by miners as in bitcoin
1634 // ppcoin: fees are destroyed to compensate the entire network
1635 if (fDebug && GetBoolArg("-printcreation"))
1636 printf("ConnectBlock() : destroy=%s nFees=%"PRI64d"\n", FormatMoney(nFees).c_str(), nFees);
1641 // Write queued txindex changes
1642 for (map<uint256, CTxIndex>::iterator mi = mapQueuedChanges.begin(); mi != mapQueuedChanges.end(); ++mi)
1644 if (!txdb.UpdateTxIndex((*mi).first, (*mi).second))
1645 return error("ConnectBlock() : UpdateTxIndex failed");
1648 // Update block index on disk without changing it in memory.
1649 // The memory index structure will be changed after the db commits.
1652 CDiskBlockIndex blockindexPrev(pindex->pprev);
1653 blockindexPrev.hashNext = pindex->GetBlockHash();
1654 if (!txdb.WriteBlockIndex(blockindexPrev))
1655 return error("ConnectBlock() : WriteBlockIndex failed");
1658 // Watch for transactions paying to me
1659 BOOST_FOREACH(CTransaction& tx, vtx)
1660 SyncWithWallets(tx, this, true);
1665 bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
1667 printf("REORGANIZE\n");
1670 CBlockIndex* pfork = pindexBest;
1671 CBlockIndex* plonger = pindexNew;
1672 while (pfork != plonger)
1674 while (plonger->nHeight > pfork->nHeight)
1675 if (!(plonger = plonger->pprev))
1676 return error("Reorganize() : plonger->pprev is null");
1677 if (pfork == plonger)
1679 if (!(pfork = pfork->pprev))
1680 return error("Reorganize() : pfork->pprev is null");
1683 // List of what to disconnect
1684 vector<CBlockIndex*> vDisconnect;
1685 for (CBlockIndex* pindex = pindexBest; pindex != pfork; pindex = pindex->pprev)
1686 vDisconnect.push_back(pindex);
1688 // List of what to connect
1689 vector<CBlockIndex*> vConnect;
1690 for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
1691 vConnect.push_back(pindex);
1692 reverse(vConnect.begin(), vConnect.end());
1694 printf("REORGANIZE: Disconnect %"PRIszu" blocks; %s..%s\n", vDisconnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexBest->GetBlockHash().ToString().substr(0,20).c_str());
1695 printf("REORGANIZE: Connect %"PRIszu" blocks; %s..%s\n", vConnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->GetBlockHash().ToString().substr(0,20).c_str());
1697 // Disconnect shorter branch
1698 vector<CTransaction> vResurrect;
1699 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
1702 if (!block.ReadFromDisk(pindex))
1703 return error("Reorganize() : ReadFromDisk for disconnect failed");
1704 if (!block.DisconnectBlock(txdb, pindex))
1705 return error("Reorganize() : DisconnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
1707 // Queue memory transactions to resurrect
1708 BOOST_FOREACH(const CTransaction& tx, block.vtx)
1709 if (!(tx.IsCoinBase() || tx.IsCoinStake()))
1710 vResurrect.push_back(tx);
1713 // Connect longer branch
1714 vector<CTransaction> vDelete;
1715 for (unsigned int i = 0; i < vConnect.size(); i++)
1717 CBlockIndex* pindex = vConnect[i];
1719 if (!block.ReadFromDisk(pindex))
1720 return error("Reorganize() : ReadFromDisk for connect failed");
1721 if (!block.ConnectBlock(txdb, pindex))
1724 return error("Reorganize() : ConnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
1727 // Queue memory transactions to delete
1728 BOOST_FOREACH(const CTransaction& tx, block.vtx)
1729 vDelete.push_back(tx);
1731 if (!txdb.WriteHashBestChain(pindexNew->GetBlockHash()))
1732 return error("Reorganize() : WriteHashBestChain failed");
1734 // Make sure it's successfully written to disk before changing memory structure
1735 if (!txdb.TxnCommit())
1736 return error("Reorganize() : TxnCommit failed");
1738 // Disconnect shorter branch
1739 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
1741 pindex->pprev->pnext = NULL;
1743 // Connect longer branch
1744 BOOST_FOREACH(CBlockIndex* pindex, vConnect)
1746 pindex->pprev->pnext = pindex;
1748 // Resurrect memory transactions that were in the disconnected branch
1749 BOOST_FOREACH(CTransaction& tx, vResurrect)
1750 tx.AcceptToMemoryPool(txdb, false);
1752 // Delete redundant memory transactions that are in the connected branch
1753 BOOST_FOREACH(CTransaction& tx, vDelete)
1756 printf("REORGANIZE: done\n");
1762 // Called from inside SetBestChain: attaches a block to the new best chain being built
1763 bool CBlock::SetBestChainInner(CTxDB& txdb, CBlockIndex *pindexNew)
1765 uint256 hash = GetHash();
1767 // Adding to current best branch
1768 if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
1771 InvalidChainFound(pindexNew);
1774 if (!txdb.TxnCommit())
1775 return error("SetBestChain() : TxnCommit failed");
1777 // Add to current best branch
1778 pindexNew->pprev->pnext = pindexNew;
1780 // Delete redundant memory transactions
1781 BOOST_FOREACH(CTransaction& tx, vtx)
1787 bool CBlock::SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew)
1789 uint256 hash = GetHash();
1791 if (!txdb.TxnBegin())
1792 return error("SetBestChain() : TxnBegin failed");
1794 if (pindexGenesisBlock == NULL && hash == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
1796 txdb.WriteHashBestChain(hash);
1797 if (!txdb.TxnCommit())
1798 return error("SetBestChain() : TxnCommit failed");
1799 pindexGenesisBlock = pindexNew;
1801 else if (hashPrevBlock == hashBestChain)
1803 if (!SetBestChainInner(txdb, pindexNew))
1804 return error("SetBestChain() : SetBestChainInner failed");
1808 // the first block in the new chain that will cause it to become the new best chain
1809 CBlockIndex *pindexIntermediate = pindexNew;
1811 // list of blocks that need to be connected afterwards
1812 std::vector<CBlockIndex*> vpindexSecondary;
1814 // Reorganize is costly in terms of db load, as it works in a single db transaction.
1815 // Try to limit how much needs to be done inside
1816 while (pindexIntermediate->pprev && pindexIntermediate->pprev->bnChainTrust > pindexBest->bnChainTrust)
1818 vpindexSecondary.push_back(pindexIntermediate);
1819 pindexIntermediate = pindexIntermediate->pprev;
1822 if (!vpindexSecondary.empty())
1823 printf("Postponing %"PRIszu" reconnects\n", vpindexSecondary.size());
1825 // Switch to new best branch
1826 if (!Reorganize(txdb, pindexIntermediate))
1829 InvalidChainFound(pindexNew);
1830 return error("SetBestChain() : Reorganize failed");
1833 // Connect further blocks
1834 BOOST_REVERSE_FOREACH(CBlockIndex *pindex, vpindexSecondary)
1837 if (!block.ReadFromDisk(pindex))
1839 printf("SetBestChain() : ReadFromDisk failed\n");
1842 if (!txdb.TxnBegin()) {
1843 printf("SetBestChain() : TxnBegin 2 failed\n");
1846 // errors now are not fatal, we still did a reorganisation to a new chain in a valid way
1847 if (!block.SetBestChainInner(txdb, pindex))
1852 // Update best block in wallet (so we can detect restored wallets)
1853 bool fIsInitialDownload = IsInitialBlockDownload();
1854 if (!fIsInitialDownload)
1856 const CBlockLocator locator(pindexNew);
1857 ::SetBestChain(locator);
1861 hashBestChain = hash;
1862 pindexBest = pindexNew;
1863 pblockindexFBBHLast = NULL;
1864 nBestHeight = pindexBest->nHeight;
1865 bnBestChainTrust = pindexNew->bnChainTrust;
1866 nTimeBestReceived = GetTime();
1867 nTransactionsUpdated++;
1869 CBigNum bnBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->bnChainTrust - pindexBest->pprev->bnChainTrust) : pindexBest->bnChainTrust;
1871 printf("SetBestChain: new best=%s height=%d trust=%s blocktrust=%s date=%s\n",
1872 hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainTrust.ToString().c_str(),
1873 bnBestBlockTrust.ToString().c_str(),
1874 DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
1876 // Check the version of the last 100 blocks to see if we need to upgrade:
1877 if (!fIsInitialDownload)
1880 const CBlockIndex* pindex = pindexBest;
1881 for (int i = 0; i < 100 && pindex != NULL; i++)
1883 if (pindex->nVersion > CBlock::CURRENT_VERSION)
1885 pindex = pindex->pprev;
1888 printf("SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, CBlock::CURRENT_VERSION);
1889 if (nUpgraded > 100/2)
1890 // strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
1891 strMiscWarning = _("Warning: This version is obsolete, upgrade required!");
1894 std::string strCmd = GetArg("-blocknotify", "");
1896 if (!fIsInitialDownload && !strCmd.empty())
1898 boost::replace_all(strCmd, "%s", hashBestChain.GetHex());
1899 boost::thread t(runCommand, strCmd); // thread runs free
1905 // ppcoin: total coin age spent in transaction, in the unit of coin-days.
1906 // Only those coins meeting minimum age requirement counts. As those
1907 // transactions not in main chain are not currently indexed so we
1908 // might not find out about their coin age. Older transactions are
1909 // guaranteed to be in main chain by sync-checkpoint. This rule is
1910 // introduced to help nodes establish a consistent view of the coin
1911 // age (trust score) of competing branches.
1912 bool CTransaction::GetCoinAge(CTxDB& txdb, uint64& nCoinAge) const
1914 CBigNum bnCentSecond = 0; // coin age in the unit of cent-seconds
1920 BOOST_FOREACH(const CTxIn& txin, vin)
1922 // First try finding the previous transaction in database
1923 CTransaction txPrev;
1925 if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
1926 continue; // previous transaction not in main chain
1927 if (nTime < txPrev.nTime)
1928 return false; // Transaction timestamp violation
1930 // Read block header
1932 if (!block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
1933 return false; // unable to read block of previous transaction
1934 if (block.GetBlockTime() + nStakeMinAge > nTime)
1935 continue; // only count coins meeting min age requirement
1937 int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
1938 bnCentSecond += CBigNum(nValueIn) * (nTime-txPrev.nTime) / CENT;
1940 if (fDebug && GetBoolArg("-printcoinage"))
1941 printf("coin age nValueIn=%"PRI64d" nTimeDiff=%d bnCentSecond=%s\n", nValueIn, nTime - txPrev.nTime, bnCentSecond.ToString().c_str());
1944 CBigNum bnCoinDay = bnCentSecond * CENT / COIN / (24 * 60 * 60);
1945 if (fDebug && GetBoolArg("-printcoinage"))
1946 printf("coin age bnCoinDay=%s\n", bnCoinDay.ToString().c_str());
1947 nCoinAge = bnCoinDay.getuint64();
1951 // ppcoin: total coin age spent in block, in the unit of coin-days.
1952 bool CBlock::GetCoinAge(uint64& nCoinAge) const
1957 BOOST_FOREACH(const CTransaction& tx, vtx)
1960 if (tx.GetCoinAge(txdb, nTxCoinAge))
1961 nCoinAge += nTxCoinAge;
1966 if (nCoinAge == 0) // block coin age minimum 1 coin-day
1968 if (fDebug && GetBoolArg("-printcoinage"))
1969 printf("block coin age total nCoinDays=%"PRI64d"\n", nCoinAge);
1973 bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
1975 // Check for duplicate
1976 uint256 hash = GetHash();
1977 if (mapBlockIndex.count(hash))
1978 return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
1980 // Construct new block index object
1981 CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
1983 return error("AddToBlockIndex() : new CBlockIndex failed");
1984 pindexNew->phashBlock = &hash;
1985 map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
1986 if (miPrev != mapBlockIndex.end())
1988 pindexNew->pprev = (*miPrev).second;
1989 pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
1992 // ppcoin: compute chain trust score
1993 pindexNew->bnChainTrust = (pindexNew->pprev ? pindexNew->pprev->bnChainTrust : 0) + pindexNew->GetBlockTrust();
1995 // ppcoin: compute stake entropy bit for stake modifier
1996 if (!pindexNew->SetStakeEntropyBit(GetStakeEntropyBit(pindexNew->nHeight)))
1997 return error("AddToBlockIndex() : SetStakeEntropyBit() failed");
1999 // ppcoin: record proof-of-stake hash value
2000 if (pindexNew->IsProofOfStake())
2002 if (!mapProofOfStake.count(hash))
2003 return error("AddToBlockIndex() : hashProofOfStake not found in map");
2004 pindexNew->hashProofOfStake = mapProofOfStake[hash];
2007 // ppcoin: compute stake modifier
2008 uint64 nStakeModifier = 0;
2009 bool fGeneratedStakeModifier = false;
2010 if (!ComputeNextStakeModifier(pindexNew->pprev, nStakeModifier, fGeneratedStakeModifier))
2011 return error("AddToBlockIndex() : ComputeNextStakeModifier() failed");
2012 pindexNew->SetStakeModifier(nStakeModifier, fGeneratedStakeModifier);
2013 pindexNew->nStakeModifierChecksum = GetStakeModifierChecksum(pindexNew);
2014 if (!CheckStakeModifierCheckpoints(pindexNew->nHeight, pindexNew->nStakeModifierChecksum))
2015 return error("AddToBlockIndex() : Rejected by stake modifier checkpoint height=%d, modifier=0x%016"PRI64x, pindexNew->nHeight, nStakeModifier);
2017 // Add to mapBlockIndex
2018 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
2019 if (pindexNew->IsProofOfStake())
2020 setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
2021 pindexNew->phashBlock = &((*mi).first);
2023 // Write to disk block index
2025 if (!txdb.TxnBegin())
2027 txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
2028 if (!txdb.TxnCommit())
2032 if (pindexNew->bnChainTrust > bnBestChainTrust)
2033 if (!SetBestChain(txdb, pindexNew))
2038 if (pindexNew == pindexBest)
2040 // Notify UI to display prev block's coinbase if it was ours
2041 static uint256 hashPrevBestCoinBase;
2042 UpdatedTransaction(hashPrevBestCoinBase);
2043 hashPrevBestCoinBase = vtx[0].GetHash();
2046 uiInterface.NotifyBlocksChanged();
2053 bool CBlock::CheckBlock(bool fCheckPOW, bool fCheckMerkleRoot) const
2055 // These are checks that are independent of context
2056 // that can be verified before saving an orphan block.
2059 if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
2060 return DoS(100, error("CheckBlock() : size limits failed"));
2062 // Special short-term limits to avoid 10,000 BDB lock limit:
2063 if (GetBlockTime() < LOCKS_SWITCH_TIME)
2065 // Rule is: #unique txids referenced <= 4,500
2066 // ... to prevent 10,000 BDB lock exhaustion on old clients
2067 set<uint256> setTxIn;
2068 for (size_t i = 0; i < vtx.size(); i++)
2070 setTxIn.insert(vtx[i].GetHash());
2071 if (i == 0) continue; // skip coinbase txin
2072 BOOST_FOREACH(const CTxIn& txin, vtx[i].vin)
2073 setTxIn.insert(txin.prevout.hash);
2075 size_t nTxids = setTxIn.size();
2077 return error("CheckBlock() : maxlocks violation");
2080 // Check proof of work matches claimed amount
2081 if (fCheckPOW && IsProofOfWork() && !CheckProofOfWork(GetHash(), nBits))
2082 return DoS(50, error("CheckBlock() : proof of work failed"));
2085 if (GetBlockTime() > GetAdjustedTime() + nMaxClockDrift)
2086 return error("CheckBlock() : block timestamp too far in the future");
2088 // First transaction must be coinbase, the rest must not be
2089 if (vtx.empty() || !vtx[0].IsCoinBase())
2090 return DoS(100, error("CheckBlock() : first tx is not coinbase"));
2091 for (unsigned int i = 1; i < vtx.size(); i++)
2092 if (vtx[i].IsCoinBase())
2093 return DoS(100, error("CheckBlock() : more than one coinbase"));
2095 // Check coinbase timestamp
2096 if (GetBlockTime() > (int64)vtx[0].nTime + nMaxClockDrift)
2097 return DoS(50, error("CheckBlock() : coinbase timestamp is too early"));
2099 if (IsProofOfStake())
2101 // ppcoin: coinbase output should be empty if proof-of-stake block
2102 if (vtx[0].vout.size() != 1 || !vtx[0].vout[0].IsEmpty())
2103 return error("CheckBlock() : coinbase output not empty for proof-of-stake block");
2105 // Second transaction must be coinstake, the rest must not be
2106 if (vtx.empty() || !vtx[1].IsCoinStake())
2107 return DoS(100, error("CheckBlock() : second tx is not coinstake"));
2108 for (unsigned int i = 2; i < vtx.size(); i++)
2109 if (vtx[i].IsCoinStake())
2110 return DoS(100, error("CheckBlock() : more than one coinstake"));
2112 // Check coinstake timestamp
2113 if (!CheckCoinStakeTimestamp(GetBlockTime(), (int64)vtx[1].nTime))
2114 return DoS(50, error("CheckBlock() : coinstake timestamp violation nTimeBlock=%"PRI64d" nTimeTx=%u", GetBlockTime(), vtx[1].nTime));
2118 // Coinbase fee paid until 20 Sep 2013
2119 int64 nFee = GetBlockTime() < CHAINCHECKS_SWITCH_TIME ? vtx[0].GetMinFee() - MIN_TX_FEE : 0;
2121 // Check coinbase reward
2122 if (vtx[0].GetValueOut() > (GetProofOfWorkReward(nBits) - nFee))
2123 return DoS(50, error("CheckBlock() : coinbase reward exceeded %s > %s",
2124 FormatMoney(vtx[0].GetValueOut()).c_str(),
2125 FormatMoney(GetProofOfWorkReward(nBits) - nFee).c_str()));
2128 // Check transactions
2129 BOOST_FOREACH(const CTransaction& tx, vtx)
2131 if (!tx.CheckTransaction())
2132 return DoS(tx.nDoS, error("CheckBlock() : CheckTransaction failed"));
2134 // ppcoin: check transaction timestamp
2135 if (GetBlockTime() < (int64)tx.nTime)
2136 return DoS(50, error("CheckBlock() : block timestamp earlier than transaction timestamp"));
2139 // Check for duplicate txids. This is caught by ConnectInputs(),
2140 // but catching it earlier avoids a potential DoS attack:
2141 set<uint256> uniqueTx;
2142 BOOST_FOREACH(const CTransaction& tx, vtx)
2144 uniqueTx.insert(tx.GetHash());
2146 if (uniqueTx.size() != vtx.size())
2147 return DoS(100, error("CheckBlock() : duplicate transaction"));
2149 unsigned int nSigOps = 0;
2150 BOOST_FOREACH(const CTransaction& tx, vtx)
2152 nSigOps += tx.GetLegacySigOpCount();
2154 if (nSigOps > MAX_BLOCK_SIGOPS)
2155 return DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"));
2157 // Check merkle root
2158 if (fCheckMerkleRoot && hashMerkleRoot != BuildMerkleTree())
2159 return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
2161 // NovaCoin: check proof-of-stake block signature
2162 if (IsProofOfStake() || (!fTestNet && GetBlockTime() < CHAINCHECKS_SWITCH_TIME))
2164 if (!CheckBlockSignature())
2165 return DoS(100, error("CheckBlock() : bad block signature"));
2171 bool CBlock::AcceptBlock()
2173 // Check for duplicate
2174 uint256 hash = GetHash();
2175 if (mapBlockIndex.count(hash))
2176 return error("AcceptBlock() : block already in mapBlockIndex");
2178 // Get prev block index
2179 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
2180 if (mi == mapBlockIndex.end())
2181 return DoS(10, error("AcceptBlock() : prev block not found"));
2182 CBlockIndex* pindexPrev = (*mi).second;
2183 int nHeight = pindexPrev->nHeight+1;
2185 // Check proof-of-work or proof-of-stake
2186 if (nBits != GetNextTargetRequired(pindexPrev, IsProofOfStake()))
2187 return DoS(100, error("AcceptBlock() : incorrect %s", IsProofOfWork() ? "proof-of-work" : "proof-of-stake"));
2189 // Check timestamp against prev
2190 if (GetBlockTime() <= pindexPrev->GetMedianTimePast() || GetBlockTime() + nMaxClockDrift < pindexPrev->GetBlockTime())
2191 return error("AcceptBlock() : block's timestamp is too early");
2193 // Check that all transactions are finalized
2194 BOOST_FOREACH(const CTransaction& tx, vtx)
2195 if (!tx.IsFinal(nHeight, GetBlockTime()))
2196 return DoS(10, error("AcceptBlock() : contains a non-final transaction"));
2198 // Check that the block chain matches the known block chain up to a checkpoint
2199 if (!Checkpoints::CheckHardened(nHeight, hash))
2200 return DoS(100, error("AcceptBlock() : rejected by hardened checkpoint lock-in at %d", nHeight));
2202 // ppcoin: check that the block satisfies synchronized checkpoint
2203 if (!Checkpoints::CheckSync(hash, pindexPrev))
2205 if(!GetBoolArg("-nosynccheckpoints", false))
2207 return error("AcceptBlock() : rejected by synchronized checkpoint");
2211 strMiscWarning = _("WARNING: syncronized checkpoint violation detected, but skipped!");
2215 // Reject block.nVersion < 3 blocks since 95% threshold on mainNet and always on testNet:
2216 if (nVersion < 3 && ((!fTestNet && nHeight > 14060) || (fTestNet && nHeight > 0)))
2217 return error("CheckBlock() : rejected nVersion < 3 block");
2219 // Enforce rule that the coinbase starts with serialized block height
2220 CScript expect = CScript() << nHeight;
2221 if (!std::equal(expect.begin(), expect.end(), vtx[0].vin[0].scriptSig.begin()))
2222 return DoS(100, error("AcceptBlock() : block height mismatch in coinbase"));
2224 // Write block to history file
2225 if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK, CLIENT_VERSION)))
2226 return error("AcceptBlock() : out of disk space");
2227 unsigned int nFile = -1;
2228 unsigned int nBlockPos = 0;
2229 if (!WriteToDisk(nFile, nBlockPos))
2230 return error("AcceptBlock() : WriteToDisk failed");
2231 if (!AddToBlockIndex(nFile, nBlockPos))
2232 return error("AcceptBlock() : AddToBlockIndex failed");
2234 // Relay inventory, but don't relay old inventory during initial block download
2235 int nBlockEstimate = Checkpoints::GetTotalBlocksEstimate();
2236 if (hashBestChain == hash)
2239 BOOST_FOREACH(CNode* pnode, vNodes)
2240 if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate))
2241 pnode->PushInventory(CInv(MSG_BLOCK, hash));
2244 // ppcoin: check pending sync-checkpoint
2245 Checkpoints::AcceptPendingSyncCheckpoint();
2250 CBigNum CBlockIndex::GetBlockTrust() const
2253 bnTarget.SetCompact(nBits);
2258 /* Old protocol, will be removed later */
2259 if (!fTestNet && GetBlockTime() < CHAINCHECKS_SWITCH_TIME)
2260 return (IsProofOfStake()? (CBigNum(1)<<256) / (bnTarget+1) : 1);
2264 // Calculate work amount for block
2265 CBigNum bnPoWTrust = bnPoWBase / (bnTarget+1);
2267 // Set bnPowTrust to 1 if we are checking PoS block or PoW difficulty is too low
2268 bnPoWTrust = (IsProofOfStake() || bnPoWTrust < 1) ? 1 : bnPoWTrust;
2270 // Return bnPoWTrust for the first 12 blocks
2271 if (pprev == NULL || pprev->nHeight < 12)
2274 const CBlockIndex* currentIndex = pprev;
2276 if(IsProofOfStake())
2278 // Return 1/3 of score if parent block is not the PoW block
2279 if (!pprev->IsProofOfWork())
2280 return (CBigNum(1)<<256) / (3 * (bnTarget+1));
2284 // Check last 12 blocks type
2285 while (pprev->nHeight - currentIndex->nHeight < 12)
2287 if (currentIndex->IsProofOfWork())
2289 currentIndex = currentIndex->pprev;
2292 // Return 1/3 of score if less than 3 PoW blocks found
2294 return (CBigNum(1)<<256) / (3 * (bnTarget+1));
2296 return (CBigNum(1)<<256) / (bnTarget+1);
2300 // Return bnPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
2301 if (!(pprev->IsProofOfStake() && pprev->pprev->IsProofOfStake()))
2302 return bnPoWTrust + (2 * (pprev->bnChainTrust - pprev->pprev->bnChainTrust) / 3);
2306 // Check last 12 blocks type
2307 while (pprev->nHeight - currentIndex->nHeight < 12)
2309 if (currentIndex->IsProofOfStake())
2311 currentIndex = currentIndex->pprev;
2314 // Return bnPoWTrust + 2/3 of previous block score if less than 7 PoS blocks found
2316 return bnPoWTrust + (2 * (pprev->bnChainTrust - pprev->pprev->bnChainTrust) / 3);
2318 bnTarget.SetCompact(pprev->nBits);
2323 // Return bnPoWTrust + full trust score for previous block nBits
2324 return bnPoWTrust + (CBigNum(1)<<256) / (bnTarget+1);
2328 bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired, unsigned int nToCheck)
2330 unsigned int nFound = 0;
2331 for (unsigned int i = 0; i < nToCheck && nFound < nRequired && pstart != NULL; i++)
2333 if (pstart->nVersion >= minVersion)
2335 pstart = pstart->pprev;
2337 return (nFound >= nRequired);
2340 bool ProcessBlock(CNode* pfrom, CBlock* pblock)
2342 // Check for duplicate
2343 uint256 hash = pblock->GetHash();
2344 if (mapBlockIndex.count(hash))
2345 return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,20).c_str());
2346 if (mapOrphanBlocks.count(hash))
2347 return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,20).c_str());
2349 // ppcoin: check proof-of-stake
2350 // Limited duplicity on stake: prevents block flood attack
2351 // Duplicate stake allowed only when there is orphan child block
2352 if (pblock->IsProofOfStake() && setStakeSeen.count(pblock->GetProofOfStake()) && !mapOrphanBlocksByPrev.count(hash) && !Checkpoints::WantedByPendingSyncCheckpoint(hash))
2353 return error("ProcessBlock() : duplicate proof-of-stake (%s, %d) for block %s", pblock->GetProofOfStake().first.ToString().c_str(), pblock->GetProofOfStake().second, hash.ToString().c_str());
2355 // Preliminary checks
2356 if (!pblock->CheckBlock())
2357 return error("ProcessBlock() : CheckBlock FAILED");
2359 // ppcoin: verify hash target and signature of coinstake tx
2360 if (pblock->IsProofOfStake())
2362 uint256 hashProofOfStake = 0;
2363 if (!CheckProofOfStake(pblock->vtx[1], pblock->nBits, hashProofOfStake))
2365 printf("WARNING: ProcessBlock(): check proof-of-stake failed for block %s\n", hash.ToString().c_str());
2366 return false; // do not error here as we expect this during initial block download
2368 if (!mapProofOfStake.count(hash)) // add to mapProofOfStake
2369 mapProofOfStake.insert(make_pair(hash, hashProofOfStake));
2372 CBlockIndex* pcheckpoint = Checkpoints::GetLastSyncCheckpoint();
2373 if (pcheckpoint && pblock->hashPrevBlock != hashBestChain && !Checkpoints::WantedByPendingSyncCheckpoint(hash))
2375 // Extra checks to prevent "fill up memory by spamming with bogus blocks"
2376 int64 deltaTime = pblock->GetBlockTime() - pcheckpoint->nTime;
2378 bnNewBlock.SetCompact(pblock->nBits);
2380 bnRequired.SetCompact(ComputeMinWork(GetLastBlockIndex(pcheckpoint, pblock->IsProofOfStake())->nBits, deltaTime));
2381 if (bnNewBlock > bnRequired)
2384 pfrom->Misbehaving(100);
2385 return error("ProcessBlock() : block with too little %s", pblock->IsProofOfStake()? "proof-of-stake" : "proof-of-work");
2389 // ppcoin: ask for pending sync-checkpoint if any
2390 if (!IsInitialBlockDownload())
2391 Checkpoints::AskForPendingSyncCheckpoint(pfrom);
2393 // If don't already have its previous block, shunt it off to holding area until we get it
2394 if (!mapBlockIndex.count(pblock->hashPrevBlock))
2396 printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
2397 CBlock* pblock2 = new CBlock(*pblock);
2398 // ppcoin: check proof-of-stake
2399 if (pblock2->IsProofOfStake())
2401 // Limited duplicity on stake: prevents block flood attack
2402 // Duplicate stake allowed only when there is orphan child block
2403 if (setStakeSeenOrphan.count(pblock2->GetProofOfStake()) && !mapOrphanBlocksByPrev.count(hash) && !Checkpoints::WantedByPendingSyncCheckpoint(hash))
2404 return error("ProcessBlock() : duplicate proof-of-stake (%s, %d) for orphan block %s", pblock2->GetProofOfStake().first.ToString().c_str(), pblock2->GetProofOfStake().second, hash.ToString().c_str());
2406 setStakeSeenOrphan.insert(pblock2->GetProofOfStake());
2408 mapOrphanBlocks.insert(make_pair(hash, pblock2));
2409 mapOrphanBlocksByPrev.insert(make_pair(pblock2->hashPrevBlock, pblock2));
2411 // Ask this guy to fill in what we're missing
2414 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(pblock2));
2415 // ppcoin: getblocks may not obtain the ancestor block rejected
2416 // earlier by duplicate-stake check so we ask for it again directly
2417 if (!IsInitialBlockDownload())
2418 pfrom->AskFor(CInv(MSG_BLOCK, WantedByOrphan(pblock2)));
2424 if (!pblock->AcceptBlock())
2425 return error("ProcessBlock() : AcceptBlock FAILED");
2427 // Recursively process any orphan blocks that depended on this one
2428 vector<uint256> vWorkQueue;
2429 vWorkQueue.push_back(hash);
2430 for (unsigned int i = 0; i < vWorkQueue.size(); i++)
2432 uint256 hashPrev = vWorkQueue[i];
2433 for (multimap<uint256, CBlock*>::iterator mi = mapOrphanBlocksByPrev.lower_bound(hashPrev);
2434 mi != mapOrphanBlocksByPrev.upper_bound(hashPrev);
2437 CBlock* pblockOrphan = (*mi).second;
2438 if (pblockOrphan->AcceptBlock())
2439 vWorkQueue.push_back(pblockOrphan->GetHash());
2440 mapOrphanBlocks.erase(pblockOrphan->GetHash());
2441 setStakeSeenOrphan.erase(pblockOrphan->GetProofOfStake());
2442 delete pblockOrphan;
2444 mapOrphanBlocksByPrev.erase(hashPrev);
2447 printf("ProcessBlock: ACCEPTED\n");
2449 // ppcoin: if responsible for sync-checkpoint send it
2450 if (pfrom && !CSyncCheckpoint::strMasterPrivKey.empty())
2451 Checkpoints::SendSyncCheckpoint(Checkpoints::AutoSelectSyncCheckpoint());
2456 // ppcoin: sign block
2457 bool CBlock::SignBlock(const CKeyStore& keystore)
2459 vector<valtype> vSolutions;
2460 txnouttype whichType;
2462 if(!IsProofOfStake())
2464 for(unsigned int i = 0; i < vtx[0].vout.size(); i++)
2466 const CTxOut& txout = vtx[0].vout[i];
2468 if (!Solver(txout.scriptPubKey, whichType, vSolutions))
2471 if (whichType == TX_PUBKEY)
2474 valtype& vchPubKey = vSolutions[0];
2477 if (!keystore.GetKey(Hash160(vchPubKey), key))
2479 if (key.GetPubKey() != vchPubKey)
2481 if(!key.Sign(GetHash(), vchBlockSig))
2490 const CTxOut& txout = vtx[1].vout[1];
2492 if (!Solver(txout.scriptPubKey, whichType, vSolutions))
2495 if (whichType == TX_PUBKEY)
2498 valtype& vchPubKey = vSolutions[0];
2501 if (!keystore.GetKey(Hash160(vchPubKey), key))
2503 if (key.GetPubKey() != vchPubKey)
2506 return key.Sign(GetHash(), vchBlockSig);
2510 printf("Sign failed\n");
2514 // ppcoin: check block signature
2515 bool CBlock::CheckBlockSignature() const
2517 if (GetHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
2518 return vchBlockSig.empty();
2520 vector<valtype> vSolutions;
2521 txnouttype whichType;
2523 if(IsProofOfStake())
2525 const CTxOut& txout = vtx[1].vout[1];
2527 if (!Solver(txout.scriptPubKey, whichType, vSolutions))
2529 if (whichType == TX_PUBKEY)
2531 valtype& vchPubKey = vSolutions[0];
2533 if (!key.SetPubKey(vchPubKey))
2535 if (vchBlockSig.empty())
2537 return key.Verify(GetHash(), vchBlockSig);
2542 for(unsigned int i = 0; i < vtx[0].vout.size(); i++)
2544 const CTxOut& txout = vtx[0].vout[i];
2546 if (!Solver(txout.scriptPubKey, whichType, vSolutions))
2549 if (whichType == TX_PUBKEY)
2552 valtype& vchPubKey = vSolutions[0];
2554 if (!key.SetPubKey(vchPubKey))
2556 if (vchBlockSig.empty())
2558 if(!key.Verify(GetHash(), vchBlockSig))
2568 bool CheckDiskSpace(uint64 nAdditionalBytes)
2570 uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
2572 // Check for nMinDiskSpace bytes (currently 50MB)
2573 if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
2576 string strMessage = _("Warning: Disk space is low!");
2577 strMiscWarning = strMessage;
2578 printf("*** %s\n", strMessage.c_str());
2579 uiInterface.ThreadSafeMessageBox(strMessage, "NovaCoin", CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
2586 static filesystem::path BlockFilePath(unsigned int nFile)
2588 string strBlockFn = strprintf("blk%04u.dat", nFile);
2589 return GetDataDir() / strBlockFn;
2592 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
2594 if ((nFile < 1) || (nFile == (unsigned int) -1))
2596 FILE* file = fopen(BlockFilePath(nFile).string().c_str(), pszMode);
2599 if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))
2601 if (fseek(file, nBlockPos, SEEK_SET) != 0)
2610 static unsigned int nCurrentBlockFile = 1;
2612 FILE* AppendBlockFile(unsigned int& nFileRet)
2617 FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
2620 if (fseek(file, 0, SEEK_END) != 0)
2622 // FAT32 file size max 4GB, fseek and ftell max 2GB, so we must stay under 2GB
2623 if (ftell(file) < (long)(0x7F000000 - MAX_SIZE))
2625 nFileRet = nCurrentBlockFile;
2629 nCurrentBlockFile++;
2633 bool LoadBlockIndex(bool fAllowNew)
2637 pchMessageStart[0] = 0xcd;
2638 pchMessageStart[1] = 0xf2;
2639 pchMessageStart[2] = 0xc0;
2640 pchMessageStart[3] = 0xef;
2642 bnProofOfWorkLimit = bnProofOfWorkLimitTestNet; // 16 bits PoW target limit for testnet
2643 nStakeMinAge = 2 * 60 * 60; // test net min age is 2 hours
2644 nModifierInterval = 20 * 60; // test modifier interval is 20 minutes
2645 nCoinbaseMaturity = 10; // test maturity is 10 blocks
2646 nStakeTargetSpacing = 5 * 60; // test block spacing is 5 minutes
2653 if (!txdb.LoadBlockIndex())
2658 // Init with genesis block
2660 if (mapBlockIndex.empty())
2669 //CBlock(hash=00000a060336cbb72fe969666d337b87198b1add2abaa59cca226820b32933a4, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b, nTime=1360105017, nBits=1e0fffff, nNonce=1575379, vtx=1, vchBlockSig=)
2670 // Coinbase(hash=4cb33b3b6a, nTime=1360105017, ver=1, vin.size=1, vout.size=1, nLockTime=0)
2671 // CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936)
2673 // vMerkleTree: 4cb33b3b6a
2677 //CBlock(hash=0000c763e402f2436da9ed36c7286f62c3f6e5dbafce9ff289bd43d7459327eb, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b, nTime=1360105017, nBits=1f00ffff, nNonce=46534, vtx=1, vchBlockSig=)
2678 // Coinbase(hash=4cb33b3b6a, nTime=1360105017, ver=1, vin.size=1, vout.size=1, nLockTime=0)
2679 // CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936)
2681 // vMerkleTree: 4cb33b3b6a
2683 const char* pszTimestamp = "https://bitcointalk.org/index.php?topic=134179.msg1502196#msg1502196";
2685 txNew.nTime = 1360105017;
2686 txNew.vin.resize(1);
2687 txNew.vout.resize(1);
2688 txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(9999) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
2689 txNew.vout[0].SetEmpty();
2691 block.vtx.push_back(txNew);
2692 block.hashPrevBlock = 0;
2693 block.hashMerkleRoot = block.BuildMerkleTree();
2695 block.nTime = 1360105017;
2696 block.nBits = bnProofOfWorkLimit.GetCompact();
2697 block.nNonce = !fTestNet ? 1575379 : 46534;
2700 assert(block.hashMerkleRoot == uint256("0x4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b"));
2702 assert(block.GetHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet));
2703 assert(block.CheckBlock());
2705 // Start new block file
2707 unsigned int nBlockPos;
2708 if (!block.WriteToDisk(nFile, nBlockPos))
2709 return error("LoadBlockIndex() : writing genesis block to disk failed");
2710 if (!block.AddToBlockIndex(nFile, nBlockPos))
2711 return error("LoadBlockIndex() : genesis block not accepted");
2713 // ppcoin: initialize synchronized checkpoint
2714 if (!Checkpoints::WriteSyncCheckpoint((!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)))
2715 return error("LoadBlockIndex() : failed to init sync checkpoint");
2718 // ppcoin: if checkpoint master key changed must reset sync-checkpoint
2721 string strPubKey = "";
2722 if (!txdb.ReadCheckpointPubKey(strPubKey) || strPubKey != CSyncCheckpoint::strMasterPubKey)
2724 // write checkpoint master key to db
2726 if (!txdb.WriteCheckpointPubKey(CSyncCheckpoint::strMasterPubKey))
2727 return error("LoadBlockIndex() : failed to write new checkpoint master key to db");
2728 if (!txdb.TxnCommit())
2729 return error("LoadBlockIndex() : failed to commit new checkpoint master key to db");
2730 if ((!fTestNet) && !Checkpoints::ResetSyncCheckpoint())
2731 return error("LoadBlockIndex() : failed to reset sync-checkpoint");
2741 void PrintBlockTree()
2743 // pre-compute tree structure
2744 map<CBlockIndex*, vector<CBlockIndex*> > mapNext;
2745 for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
2747 CBlockIndex* pindex = (*mi).second;
2748 mapNext[pindex->pprev].push_back(pindex);
2750 //while (rand() % 3 == 0)
2751 // mapNext[pindex->pprev].push_back(pindex);
2754 vector<pair<int, CBlockIndex*> > vStack;
2755 vStack.push_back(make_pair(0, pindexGenesisBlock));
2758 while (!vStack.empty())
2760 int nCol = vStack.back().first;
2761 CBlockIndex* pindex = vStack.back().second;
2764 // print split or gap
2765 if (nCol > nPrevCol)
2767 for (int i = 0; i < nCol-1; i++)
2771 else if (nCol < nPrevCol)
2773 for (int i = 0; i < nCol; i++)
2780 for (int i = 0; i < nCol; i++)
2785 block.ReadFromDisk(pindex);
2786 printf("%d (%u,%u) %s %08x %s mint %7s tx %"PRIszu"",
2790 block.GetHash().ToString().c_str(),
2792 DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
2793 FormatMoney(pindex->nMint).c_str(),
2796 PrintWallets(block);
2798 // put the main time-chain first
2799 vector<CBlockIndex*>& vNext = mapNext[pindex];
2800 for (unsigned int i = 0; i < vNext.size(); i++)
2802 if (vNext[i]->pnext)
2804 swap(vNext[0], vNext[i]);
2810 for (unsigned int i = 0; i < vNext.size(); i++)
2811 vStack.push_back(make_pair(nCol+i, vNext[i]));
2815 bool LoadExternalBlockFile(FILE* fileIn)
2817 int64 nStart = GetTimeMillis();
2823 CAutoFile blkdat(fileIn, SER_DISK, CLIENT_VERSION);
2824 unsigned int nPos = 0;
2825 while (nPos != (unsigned int)-1 && blkdat.good() && !fRequestShutdown)
2827 unsigned char pchData[65536];
2829 fseek(blkdat, nPos, SEEK_SET);
2830 int nRead = fread(pchData, 1, sizeof(pchData), blkdat);
2833 nPos = (unsigned int)-1;
2836 void* nFind = memchr(pchData, pchMessageStart[0], nRead+1-sizeof(pchMessageStart));
2839 if (memcmp(nFind, pchMessageStart, sizeof(pchMessageStart))==0)
2841 nPos += ((unsigned char*)nFind - pchData) + sizeof(pchMessageStart);
2844 nPos += ((unsigned char*)nFind - pchData) + 1;
2847 nPos += sizeof(pchData) - sizeof(pchMessageStart) + 1;
2848 } while(!fRequestShutdown);
2849 if (nPos == (unsigned int)-1)
2851 fseek(blkdat, nPos, SEEK_SET);
2854 if (nSize > 0 && nSize <= MAX_BLOCK_SIZE)
2858 if (ProcessBlock(NULL,&block))
2866 catch (std::exception &e) {
2867 printf("%s() : Deserialize or I/O error caught during load\n",
2868 __PRETTY_FUNCTION__);
2871 printf("Loaded %i blocks from external file in %"PRI64d"ms\n", nLoaded, GetTimeMillis() - nStart);
2883 //////////////////////////////////////////////////////////////////////////////
2888 extern map<uint256, CAlert> mapAlerts;
2889 extern CCriticalSection cs_mapAlerts;
2891 static string strMintMessage = "Info: Minting suspended due to locked wallet.";
2892 static string strMintWarning;
2894 string GetWarnings(string strFor)
2897 string strStatusBar;
2900 if (GetBoolArg("-testsafemode"))
2903 // ppcoin: wallet lock warning for minting
2904 if (strMintWarning != "")
2907 strStatusBar = strMintWarning;
2910 // Misc warnings like out of disk space and clock is wrong
2911 if (strMiscWarning != "")
2914 strStatusBar = strMiscWarning;
2917 // ppcoin: should not enter safe mode for longer invalid chain
2918 // ppcoin: if sync-checkpoint is too old do not enter safe mode
2919 if (Checkpoints::IsSyncCheckpointTooOld(60 * 60 * 24 * 10) && !fTestNet && !IsInitialBlockDownload())
2922 strStatusBar = "WARNING: Checkpoint is too old. Wait for block chain to download, or notify developers.";
2925 // ppcoin: if detected invalid checkpoint enter safe mode
2926 if (Checkpoints::hashInvalidCheckpoint != 0)
2929 strStatusBar = strRPC = "WARNING: Invalid checkpoint found! Displayed transactions may not be correct! You may need to upgrade, or notify developers.";
2935 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
2937 const CAlert& alert = item.second;
2938 if (alert.AppliesToMe() && alert.nPriority > nPriority)
2940 nPriority = alert.nPriority;
2941 strStatusBar = alert.strStatusBar;
2942 if (nPriority > 1000)
2943 strRPC = strStatusBar; // ppcoin: safe mode for high alert
2948 if (strFor == "statusbar")
2949 return strStatusBar;
2950 else if (strFor == "rpc")
2952 assert(!"GetWarnings() : invalid parameter");
2963 //////////////////////////////////////////////////////////////////////////////
2969 bool static AlreadyHave(CTxDB& txdb, const CInv& inv)
2975 bool txInMap = false;
2978 txInMap = (mempool.exists(inv.hash));
2981 mapOrphanTransactions.count(inv.hash) ||
2982 txdb.ContainsTx(inv.hash);
2986 return mapBlockIndex.count(inv.hash) ||
2987 mapOrphanBlocks.count(inv.hash);
2989 // Don't know what it is, just say we already got one
2996 // The message start string is designed to be unlikely to occur in normal data.
2997 // The characters are rarely used upper ASCII, not valid as UTF-8, and produce
2998 // a large 4-byte int at any alignment.
2999 unsigned char pchMessageStart[4] = { 0xe4, 0xe8, 0xe9, 0xe5 };
3001 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
3003 static map<CService, CPubKey> mapReuseKey;
3004 RandAddSeedPerfmon();
3006 printf("received: %s (%"PRIszu" bytes)\n", strCommand.c_str(), vRecv.size());
3007 if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
3009 printf("dropmessagestest DROPPING RECV MESSAGE\n");
3017 if (strCommand == "version")
3019 // Each connection can only send one version message
3020 if (pfrom->nVersion != 0)
3022 pfrom->Misbehaving(1);
3030 vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
3031 if (pfrom->nVersion < MIN_PROTO_VERSION)
3033 // Since February 20, 2012, the protocol is initiated at version 209,
3034 // and earlier versions are no longer supported
3035 printf("partner %s using obsolete version %i; disconnecting\n", pfrom->addr.ToString().c_str(), pfrom->nVersion);
3036 pfrom->fDisconnect = true;
3040 if (pfrom->nVersion == 10300)
3041 pfrom->nVersion = 300;
3043 vRecv >> addrFrom >> nNonce;
3045 vRecv >> pfrom->strSubVer;
3047 vRecv >> pfrom->nStartingHeight;
3049 if (pfrom->fInbound && addrMe.IsRoutable())
3051 pfrom->addrLocal = addrMe;
3055 // Disconnect if we connected to ourself
3056 if (nNonce == nLocalHostNonce && nNonce > 1)
3058 printf("connected to self at %s, disconnecting\n", pfrom->addr.ToString().c_str());
3059 pfrom->fDisconnect = true;
3063 // ppcoin: record my external IP reported by peer
3064 if (addrFrom.IsRoutable() && addrMe.IsRoutable())
3065 addrSeenByPeer = addrMe;
3067 // Be shy and don't send version until we hear
3068 if (pfrom->fInbound)
3069 pfrom->PushVersion();
3071 pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
3073 AddTimeData(pfrom->addr, nTime);
3076 pfrom->PushMessage("verack");
3077 pfrom->vSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
3079 if (!pfrom->fInbound)
3081 // Advertise our address
3082 if (!fNoListen && !IsInitialBlockDownload())
3084 CAddress addr = GetLocalAddress(&pfrom->addr);
3085 if (addr.IsRoutable())
3086 pfrom->PushAddress(addr);
3089 // Get recent addresses
3090 if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000)
3092 pfrom->PushMessage("getaddr");
3093 pfrom->fGetAddr = true;
3095 addrman.Good(pfrom->addr);
3097 if (((CNetAddr)pfrom->addr) == (CNetAddr)addrFrom)
3099 addrman.Add(addrFrom, addrFrom);
3100 addrman.Good(addrFrom);
3104 // Ask the first connected node for block updates
3105 static int nAskedForBlocks = 0;
3106 if (!pfrom->fClient && !pfrom->fOneShot &&
3107 (pfrom->nStartingHeight > (nBestHeight - 144)) &&
3108 (pfrom->nVersion < NOBLKS_VERSION_START ||
3109 pfrom->nVersion >= NOBLKS_VERSION_END) &&
3110 (nAskedForBlocks < 1 || vNodes.size() <= 1))
3113 pfrom->PushGetBlocks(pindexBest, uint256(0));
3119 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
3120 item.second.RelayTo(pfrom);
3123 // ppcoin: relay sync-checkpoint
3125 LOCK(Checkpoints::cs_hashSyncCheckpoint);
3126 if (!Checkpoints::checkpointMessage.IsNull())
3127 Checkpoints::checkpointMessage.RelayTo(pfrom);
3130 pfrom->fSuccessfullyConnected = true;
3132 printf("receive version message: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", pfrom->nVersion, pfrom->nStartingHeight, addrMe.ToString().c_str(), addrFrom.ToString().c_str(), pfrom->addr.ToString().c_str());
3134 cPeerBlockCounts.input(pfrom->nStartingHeight);
3136 // ppcoin: ask for pending sync-checkpoint if any
3137 if (!IsInitialBlockDownload())
3138 Checkpoints::AskForPendingSyncCheckpoint(pfrom);
3142 else if (pfrom->nVersion == 0)
3144 // Must have a version message before anything else
3145 pfrom->Misbehaving(1);
3150 else if (strCommand == "verack")
3152 pfrom->vRecv.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
3156 else if (strCommand == "addr")
3158 vector<CAddress> vAddr;
3161 // Don't want addr from older versions unless seeding
3162 if (pfrom->nVersion < CADDR_TIME_VERSION && addrman.size() > 1000)
3164 if (vAddr.size() > 1000)
3166 pfrom->Misbehaving(20);
3167 return error("message addr size() = %"PRIszu"", vAddr.size());
3170 // Store the new addresses
3171 vector<CAddress> vAddrOk;
3172 int64 nNow = GetAdjustedTime();
3173 int64 nSince = nNow - 10 * 60;
3174 BOOST_FOREACH(CAddress& addr, vAddr)
3178 if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
3179 addr.nTime = nNow - 5 * 24 * 60 * 60;
3180 pfrom->AddAddressKnown(addr);
3181 bool fReachable = IsReachable(addr);
3182 if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
3184 // Relay to a limited number of other nodes
3187 // Use deterministic randomness to send to the same nodes for 24 hours
3188 // at a time so the setAddrKnowns of the chosen nodes prevent repeats
3189 static uint256 hashSalt;
3191 hashSalt = GetRandHash();
3192 uint64 hashAddr = addr.GetHash();
3193 uint256 hashRand = hashSalt ^ (hashAddr<<32) ^ ((GetTime()+hashAddr)/(24*60*60));
3194 hashRand = Hash(BEGIN(hashRand), END(hashRand));
3195 multimap<uint256, CNode*> mapMix;
3196 BOOST_FOREACH(CNode* pnode, vNodes)
3198 if (pnode->nVersion < CADDR_TIME_VERSION)
3200 unsigned int nPointer;
3201 memcpy(&nPointer, &pnode, sizeof(nPointer));
3202 uint256 hashKey = hashRand ^ nPointer;
3203 hashKey = Hash(BEGIN(hashKey), END(hashKey));
3204 mapMix.insert(make_pair(hashKey, pnode));
3206 int nRelayNodes = fReachable ? 2 : 1; // limited relaying of addresses outside our network(s)
3207 for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
3208 ((*mi).second)->PushAddress(addr);
3211 // Do not store addresses outside our network
3213 vAddrOk.push_back(addr);
3215 addrman.Add(vAddrOk, pfrom->addr, 2 * 60 * 60);
3216 if (vAddr.size() < 1000)
3217 pfrom->fGetAddr = false;
3218 if (pfrom->fOneShot)
3219 pfrom->fDisconnect = true;
3223 else if (strCommand == "inv")
3227 if (vInv.size() > MAX_INV_SZ)
3229 pfrom->Misbehaving(20);
3230 return error("message inv size() = %"PRIszu"", vInv.size());
3233 // find last block in inv vector
3234 unsigned int nLastBlock = (unsigned int)(-1);
3235 for (unsigned int nInv = 0; nInv < vInv.size(); nInv++) {
3236 if (vInv[vInv.size() - 1 - nInv].type == MSG_BLOCK) {
3237 nLastBlock = vInv.size() - 1 - nInv;
3242 for (unsigned int nInv = 0; nInv < vInv.size(); nInv++)
3244 const CInv &inv = vInv[nInv];
3248 pfrom->AddInventoryKnown(inv);
3250 bool fAlreadyHave = AlreadyHave(txdb, inv);
3252 printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
3256 else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash)) {
3257 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
3258 } else if (nInv == nLastBlock) {
3259 // In case we are on a very long side-chain, it is possible that we already have
3260 // the last block in an inv bundle sent in response to getblocks. Try to detect
3261 // this situation and push another getblocks to continue.
3262 pfrom->PushGetBlocks(mapBlockIndex[inv.hash], uint256(0));
3264 printf("force request: %s\n", inv.ToString().c_str());
3267 // Track requests for our stuff
3268 Inventory(inv.hash);
3273 else if (strCommand == "getdata")
3277 if (vInv.size() > MAX_INV_SZ)
3279 pfrom->Misbehaving(20);
3280 return error("message getdata size() = %"PRIszu"", vInv.size());
3283 if (fDebugNet || (vInv.size() != 1))
3284 printf("received getdata (%"PRIszu" invsz)\n", vInv.size());
3286 BOOST_FOREACH(const CInv& inv, vInv)
3290 if (fDebugNet || (vInv.size() == 1))
3291 printf("received getdata for: %s\n", inv.ToString().c_str());
3293 if (inv.type == MSG_BLOCK)
3295 // Send block from disk
3296 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(inv.hash);
3297 if (mi != mapBlockIndex.end())
3300 block.ReadFromDisk((*mi).second);
3301 pfrom->PushMessage("block", block);
3303 // Trigger them to send a getblocks request for the next batch of inventory
3304 if (inv.hash == pfrom->hashContinue)
3306 // ppcoin: send latest proof-of-work block to allow the
3307 // download node to accept as orphan (proof-of-stake
3308 // block might be rejected by stake connection check)
3310 vInv.push_back(CInv(MSG_BLOCK, GetLastBlockIndex(pindexBest, false)->GetBlockHash()));
3311 pfrom->PushMessage("inv", vInv);
3312 pfrom->hashContinue = 0;
3316 else if (inv.IsKnownType())
3318 // Send stream from relay memory
3319 bool pushed = false;
3322 map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
3323 if (mi != mapRelay.end()) {
3324 pfrom->PushMessage(inv.GetCommand(), (*mi).second);
3328 if (!pushed && inv.type == MSG_TX) {
3330 if (mempool.exists(inv.hash)) {
3331 CTransaction tx = mempool.lookup(inv.hash);
3332 CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
3335 pfrom->PushMessage("tx", ss);
3340 // Track requests for our stuff
3341 Inventory(inv.hash);
3346 else if (strCommand == "getblocks")
3348 CBlockLocator locator;
3350 vRecv >> locator >> hashStop;
3352 // Find the last block the caller has in the main chain
3353 CBlockIndex* pindex = locator.GetBlockIndex();
3355 // Send the rest of the chain
3357 pindex = pindex->pnext;
3359 printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
3360 for (; pindex; pindex = pindex->pnext)
3362 if (pindex->GetBlockHash() == hashStop)
3364 printf(" getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str());
3365 // ppcoin: tell downloading node about the latest block if it's
3366 // without risk being rejected due to stake connection check
3367 if (hashStop != hashBestChain && pindex->GetBlockTime() + nStakeMinAge > pindexBest->GetBlockTime())
3368 pfrom->PushInventory(CInv(MSG_BLOCK, hashBestChain));
3371 pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
3374 // When this block is requested, we'll send an inv that'll make them
3375 // getblocks the next batch of inventory.
3376 printf(" getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str());
3377 pfrom->hashContinue = pindex->GetBlockHash();
3382 else if (strCommand == "checkpoint")
3384 CSyncCheckpoint checkpoint;
3385 vRecv >> checkpoint;
3387 if (checkpoint.ProcessSyncCheckpoint(pfrom))
3390 pfrom->hashCheckpointKnown = checkpoint.hashCheckpoint;
3392 BOOST_FOREACH(CNode* pnode, vNodes)
3393 checkpoint.RelayTo(pnode);
3397 else if (strCommand == "getheaders")
3399 CBlockLocator locator;
3401 vRecv >> locator >> hashStop;
3403 CBlockIndex* pindex = NULL;
3404 if (locator.IsNull())
3406 // If locator is null, return the hashStop block
3407 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashStop);
3408 if (mi == mapBlockIndex.end())
3410 pindex = (*mi).second;
3414 // Find the last block the caller has in the main chain
3415 pindex = locator.GetBlockIndex();
3417 pindex = pindex->pnext;
3420 vector<CBlock> vHeaders;
3422 printf("getheaders %d to %s\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str());
3423 for (; pindex; pindex = pindex->pnext)
3425 vHeaders.push_back(pindex->GetBlockHeader());
3426 if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
3429 pfrom->PushMessage("headers", vHeaders);
3433 else if (strCommand == "tx")
3435 vector<uint256> vWorkQueue;
3436 vector<uint256> vEraseQueue;
3437 CDataStream vMsg(vRecv);
3442 CInv inv(MSG_TX, tx.GetHash());
3443 pfrom->AddInventoryKnown(inv);
3445 // Truncate messages to the size of the tx in them
3446 unsigned int nSize = ::GetSerializeSize(tx,SER_NETWORK, PROTOCOL_VERSION);
3447 if (nSize < vMsg.size()){
3451 bool fMissingInputs = false;
3452 if (tx.AcceptToMemoryPool(txdb, true, &fMissingInputs))
3454 SyncWithWallets(tx, NULL, true);
3455 RelayMessage(inv, vMsg);
3456 mapAlreadyAskedFor.erase(inv);
3457 vWorkQueue.push_back(inv.hash);
3458 vEraseQueue.push_back(inv.hash);
3460 // Recursively process any orphan transactions that depended on this one
3461 for (unsigned int i = 0; i < vWorkQueue.size(); i++)
3463 uint256 hashPrev = vWorkQueue[i];
3464 for (map<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev[hashPrev].begin();
3465 mi != mapOrphanTransactionsByPrev[hashPrev].end();
3468 const CDataStream& vMsg = *((*mi).second);
3470 CDataStream(vMsg) >> tx;
3471 CInv inv(MSG_TX, tx.GetHash());
3472 bool fMissingInputs2 = false;
3474 if (tx.AcceptToMemoryPool(txdb, true, &fMissingInputs2))
3476 printf(" accepted orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
3477 SyncWithWallets(tx, NULL, true);
3478 RelayMessage(inv, vMsg);
3479 mapAlreadyAskedFor.erase(inv);
3480 vWorkQueue.push_back(inv.hash);
3481 vEraseQueue.push_back(inv.hash);
3483 else if (!fMissingInputs2)
3486 vEraseQueue.push_back(inv.hash);
3487 printf(" removed invalid orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
3492 BOOST_FOREACH(uint256 hash, vEraseQueue)
3493 EraseOrphanTx(hash);
3495 else if (fMissingInputs)
3499 // DoS prevention: do not allow mapOrphanTransactions to grow unbounded
3500 unsigned int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
3502 printf("mapOrphan overflow, removed %u tx\n", nEvicted);
3504 if (tx.nDoS) pfrom->Misbehaving(tx.nDoS);
3508 else if (strCommand == "block")
3513 printf("received block %s\n", block.GetHash().ToString().substr(0,20).c_str());
3516 CInv inv(MSG_BLOCK, block.GetHash());
3517 pfrom->AddInventoryKnown(inv);
3519 if (ProcessBlock(pfrom, &block))
3520 mapAlreadyAskedFor.erase(inv);
3521 if (block.nDoS) pfrom->Misbehaving(block.nDoS);
3525 else if (strCommand == "getaddr")
3527 pfrom->vAddrToSend.clear();
3528 vector<CAddress> vAddr = addrman.GetAddr();
3529 BOOST_FOREACH(const CAddress &addr, vAddr)
3530 pfrom->PushAddress(addr);
3534 else if (strCommand == "mempool")
3536 std::vector<uint256> vtxid;
3537 mempool.queryHashes(vtxid);
3539 for (unsigned int i = 0; i < vtxid.size(); i++) {
3540 CInv inv(MSG_TX, vtxid[i]);
3541 vInv.push_back(inv);
3542 if (i == (MAX_INV_SZ - 1))
3545 if (vInv.size() > 0)
3546 pfrom->PushMessage("inv", vInv);
3550 else if (strCommand == "checkorder")
3555 if (!GetBoolArg("-allowreceivebyip"))
3557 pfrom->PushMessage("reply", hashReply, (int)2, string(""));
3564 /// we have a chance to check the order here
3566 // Keep giving the same key to the same ip until they use it
3567 if (!mapReuseKey.count(pfrom->addr))
3568 pwalletMain->GetKeyFromPool(mapReuseKey[pfrom->addr], true);
3570 // Send back approval of order and pubkey to use
3571 CScript scriptPubKey;
3572 scriptPubKey << mapReuseKey[pfrom->addr] << OP_CHECKSIG;
3573 pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
3577 else if (strCommand == "reply")
3582 CRequestTracker tracker;
3584 LOCK(pfrom->cs_mapRequests);
3585 map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
3586 if (mi != pfrom->mapRequests.end())
3588 tracker = (*mi).second;
3589 pfrom->mapRequests.erase(mi);
3592 if (!tracker.IsNull())
3593 tracker.fn(tracker.param1, vRecv);
3597 else if (strCommand == "ping")
3599 if (pfrom->nVersion > BIP0031_VERSION)
3603 // Echo the message back with the nonce. This allows for two useful features:
3605 // 1) A remote node can quickly check if the connection is operational
3606 // 2) Remote nodes can measure the latency of the network thread. If this node
3607 // is overloaded it won't respond to pings quickly and the remote node can
3608 // avoid sending us more work, like chain download requests.
3610 // The nonce stops the remote getting confused between different pings: without
3611 // it, if the remote node sends a ping once per second and this node takes 5
3612 // seconds to respond to each, the 5th ping the remote sends would appear to
3613 // return very quickly.
3614 pfrom->PushMessage("pong", nonce);
3619 else if (strCommand == "alert")
3624 uint256 alertHash = alert.GetHash();
3625 if (pfrom->setKnown.count(alertHash) == 0)
3627 if (alert.ProcessAlert())
3630 pfrom->setKnown.insert(alertHash);
3633 BOOST_FOREACH(CNode* pnode, vNodes)
3634 alert.RelayTo(pnode);
3638 // Small DoS penalty so peers that send us lots of
3639 // duplicate/expired/invalid-signature/whatever alerts
3640 // eventually get banned.
3641 // This isn't a Misbehaving(100) (immediate ban) because the
3642 // peer might be an older or different implementation with
3643 // a different signature key, etc.
3644 pfrom->Misbehaving(10);
3652 // Ignore unknown commands for extensibility
3656 // Update the last seen time for this node's address
3657 if (pfrom->fNetworkNode)
3658 if (strCommand == "version" || strCommand == "addr" || strCommand == "inv" || strCommand == "getdata" || strCommand == "ping")
3659 AddressCurrentlyConnected(pfrom->addr);
3665 bool ProcessMessages(CNode* pfrom)
3667 CDataStream& vRecv = pfrom->vRecv;
3671 // printf("ProcessMessages(%u bytes)\n", vRecv.size());
3675 // (4) message start
3684 // Don't bother if send buffer is too full to respond anyway
3685 if (pfrom->vSend.size() >= SendBufferSize())
3688 // Scan for message start
3689 CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
3690 int nHeaderSize = vRecv.GetSerializeSize(CMessageHeader());
3691 if (vRecv.end() - pstart < nHeaderSize)
3693 if ((int)vRecv.size() > nHeaderSize)
3695 printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
3696 vRecv.erase(vRecv.begin(), vRecv.end() - nHeaderSize);
3700 if (pstart - vRecv.begin() > 0)
3701 printf("\n\nPROCESSMESSAGE SKIPPED %"PRIpdd" BYTES\n\n", pstart - vRecv.begin());
3702 vRecv.erase(vRecv.begin(), pstart);
3705 vector<char> vHeaderSave(vRecv.begin(), vRecv.begin() + nHeaderSize);
3710 printf("\n\nPROCESSMESSAGE: ERRORS IN HEADER %s\n\n\n", hdr.GetCommand().c_str());
3713 string strCommand = hdr.GetCommand();
3716 unsigned int nMessageSize = hdr.nMessageSize;
3717 if (nMessageSize > MAX_SIZE)
3719 printf("ProcessMessages(%s, %u bytes) : nMessageSize > MAX_SIZE\n", strCommand.c_str(), nMessageSize);
3722 if (nMessageSize > vRecv.size())
3724 // Rewind and wait for rest of message
3725 vRecv.insert(vRecv.begin(), vHeaderSave.begin(), vHeaderSave.end());
3730 uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
3731 unsigned int nChecksum = 0;
3732 memcpy(&nChecksum, &hash, sizeof(nChecksum));
3733 if (nChecksum != hdr.nChecksum)
3735 printf("ProcessMessages(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
3736 strCommand.c_str(), nMessageSize, nChecksum, hdr.nChecksum);
3740 // Copy message to its own buffer
3741 CDataStream vMsg(vRecv.begin(), vRecv.begin() + nMessageSize, vRecv.nType, vRecv.nVersion);
3742 vRecv.ignore(nMessageSize);
3750 fRet = ProcessMessage(pfrom, strCommand, vMsg);
3755 catch (std::ios_base::failure& e)
3757 if (strstr(e.what(), "end of data"))
3759 // Allow exceptions from under-length message on vRecv
3760 printf("ProcessMessages(%s, %u bytes) : Exception '%s' caught, normally caused by a message being shorter than its stated length\n", strCommand.c_str(), nMessageSize, e.what());
3762 else if (strstr(e.what(), "size too large"))
3764 // Allow exceptions from over-long size
3765 printf("ProcessMessages(%s, %u bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
3769 PrintExceptionContinue(&e, "ProcessMessages()");
3772 catch (std::exception& e) {
3773 PrintExceptionContinue(&e, "ProcessMessages()");
3775 PrintExceptionContinue(NULL, "ProcessMessages()");
3779 printf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand.c_str(), nMessageSize);
3787 bool SendMessages(CNode* pto, bool fSendTrickle)
3789 TRY_LOCK(cs_main, lockMain);
3791 // Don't send anything until we get their version message
3792 if (pto->nVersion == 0)
3795 // Keep-alive ping. We send a nonce of zero because we don't use it anywhere
3797 if (pto->nLastSend && GetTime() - pto->nLastSend > 30 * 60 && pto->vSend.empty()) {
3799 if (pto->nVersion > BIP0031_VERSION)
3800 pto->PushMessage("ping", nonce);
3802 pto->PushMessage("ping");
3805 // Resend wallet transactions that haven't gotten in a block yet
3806 ResendWalletTransactions();
3808 // Address refresh broadcast
3809 static int64 nLastRebroadcast;
3810 if (!IsInitialBlockDownload() && (GetTime() - nLastRebroadcast > 24 * 60 * 60))
3814 BOOST_FOREACH(CNode* pnode, vNodes)
3816 // Periodically clear setAddrKnown to allow refresh broadcasts
3817 if (nLastRebroadcast)
3818 pnode->setAddrKnown.clear();
3820 // Rebroadcast our address
3823 CAddress addr = GetLocalAddress(&pnode->addr);
3824 if (addr.IsRoutable())
3825 pnode->PushAddress(addr);
3829 nLastRebroadcast = GetTime();
3837 vector<CAddress> vAddr;
3838 vAddr.reserve(pto->vAddrToSend.size());
3839 BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
3841 // returns true if wasn't already contained in the set
3842 if (pto->setAddrKnown.insert(addr).second)
3844 vAddr.push_back(addr);
3845 // receiver rejects addr messages larger than 1000
3846 if (vAddr.size() >= 1000)
3848 pto->PushMessage("addr", vAddr);
3853 pto->vAddrToSend.clear();
3855 pto->PushMessage("addr", vAddr);
3860 // Message: inventory
3863 vector<CInv> vInvWait;
3865 LOCK(pto->cs_inventory);
3866 vInv.reserve(pto->vInventoryToSend.size());
3867 vInvWait.reserve(pto->vInventoryToSend.size());
3868 BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
3870 if (pto->setInventoryKnown.count(inv))
3873 // trickle out tx inv to protect privacy
3874 if (inv.type == MSG_TX && !fSendTrickle)
3876 // 1/4 of tx invs blast to all immediately
3877 static uint256 hashSalt;
3879 hashSalt = GetRandHash();
3880 uint256 hashRand = inv.hash ^ hashSalt;
3881 hashRand = Hash(BEGIN(hashRand), END(hashRand));
3882 bool fTrickleWait = ((hashRand & 3) != 0);
3884 // always trickle our own transactions
3888 if (GetTransaction(inv.hash, wtx))
3890 fTrickleWait = true;
3895 vInvWait.push_back(inv);
3900 // returns true if wasn't already contained in the set
3901 if (pto->setInventoryKnown.insert(inv).second)
3903 vInv.push_back(inv);
3904 if (vInv.size() >= 1000)
3906 pto->PushMessage("inv", vInv);
3911 pto->vInventoryToSend = vInvWait;
3914 pto->PushMessage("inv", vInv);
3920 vector<CInv> vGetData;
3921 int64 nNow = GetTime() * 1000000;
3923 while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
3925 const CInv& inv = (*pto->mapAskFor.begin()).second;
3926 if (!AlreadyHave(txdb, inv))
3929 printf("sending getdata: %s\n", inv.ToString().c_str());
3930 vGetData.push_back(inv);
3931 if (vGetData.size() >= 1000)
3933 pto->PushMessage("getdata", vGetData);
3936 mapAlreadyAskedFor[inv] = nNow;
3938 pto->mapAskFor.erase(pto->mapAskFor.begin());
3940 if (!vGetData.empty())
3941 pto->PushMessage("getdata", vGetData);
3960 //////////////////////////////////////////////////////////////////////////////
3965 int static FormatHashBlocks(void* pbuffer, unsigned int len)
3967 unsigned char* pdata = (unsigned char*)pbuffer;
3968 unsigned int blocks = 1 + ((len + 8) / 64);
3969 unsigned char* pend = pdata + 64 * blocks;
3970 memset(pdata + len, 0, 64 * blocks - len);
3972 unsigned int bits = len * 8;
3973 pend[-1] = (bits >> 0) & 0xff;
3974 pend[-2] = (bits >> 8) & 0xff;
3975 pend[-3] = (bits >> 16) & 0xff;
3976 pend[-4] = (bits >> 24) & 0xff;
3980 static const unsigned int pSHA256InitState[8] =
3981 {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
3983 void SHA256Transform(void* pstate, void* pinput, const void* pinit)
3986 unsigned char data[64];
3990 for (int i = 0; i < 16; i++)
3991 ((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]);
3993 for (int i = 0; i < 8; i++)
3994 ctx.h[i] = ((uint32_t*)pinit)[i];
3996 SHA256_Update(&ctx, data, sizeof(data));
3997 for (int i = 0; i < 8; i++)
3998 ((uint32_t*)pstate)[i] = ctx.h[i];
4001 // Some explaining would be appreciated
4006 set<uint256> setDependsOn;
4010 COrphan(CTransaction* ptxIn)
4013 dPriority = dFeePerKb = 0;
4018 printf("COrphan(hash=%s, dPriority=%.1f, dFeePerKb=%.1f)\n",
4019 ptx->GetHash().ToString().substr(0,10).c_str(), dPriority, dFeePerKb);
4020 BOOST_FOREACH(uint256 hash, setDependsOn)
4021 printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
4026 uint64 nLastBlockTx = 0;
4027 uint64 nLastBlockSize = 0;
4028 int64 nLastCoinStakeSearchInterval = 0;
4030 // We want to sort transactions by priority and fee, so:
4031 typedef boost::tuple<double, double, CTransaction*> TxPriority;
4032 class TxPriorityCompare
4036 TxPriorityCompare(bool _byFee) : byFee(_byFee) { }
4037 bool operator()(const TxPriority& a, const TxPriority& b)
4041 if (a.get<1>() == b.get<1>())
4042 return a.get<0>() < b.get<0>();
4043 return a.get<1>() < b.get<1>();
4047 if (a.get<0>() == b.get<0>())
4048 return a.get<1>() < b.get<1>();
4049 return a.get<0>() < b.get<0>();
4055 // fProofOfStake: try (best effort) to make a proof-of-stake block
4056 CBlock* CreateNewBlock(CWallet* pwallet, bool fProofOfStake)
4058 CReserveKey reservekey(pwallet);
4061 auto_ptr<CBlock> pblock(new CBlock());
4065 // Create coinbase tx
4067 txNew.vin.resize(1);
4068 txNew.vin[0].prevout.SetNull();
4069 txNew.vout.resize(1);
4070 txNew.vout[0].scriptPubKey << reservekey.GetReservedKey() << OP_CHECKSIG;
4072 // Add our coinbase tx as first transaction
4073 pblock->vtx.push_back(txNew);
4075 // Largest block you're willing to create:
4076 unsigned int nBlockMaxSize = GetArg("-blockmaxsize", MAX_BLOCK_SIZE_GEN/2);
4077 // Limit to betweeen 1K and MAX_BLOCK_SIZE-1K for sanity:
4078 nBlockMaxSize = std::max((unsigned int)1000, std::min((unsigned int)(MAX_BLOCK_SIZE-1000), nBlockMaxSize));
4080 // Special compatibility rule before 20 Aug: limit size to 500,000 bytes:
4081 if (GetAdjustedTime() < LOCKS_SWITCH_TIME)
4082 nBlockMaxSize = std::min(nBlockMaxSize, (unsigned int)(MAX_BLOCK_SIZE_GEN));
4084 // How much of the block should be dedicated to high-priority transactions,
4085 // included regardless of the fees they pay
4086 unsigned int nBlockPrioritySize = GetArg("-blockprioritysize", 27000);
4087 nBlockPrioritySize = std::min(nBlockMaxSize, nBlockPrioritySize);
4089 // Minimum block size you want to create; block will be filled with free transactions
4090 // until there are no more or the block reaches this size:
4091 unsigned int nBlockMinSize = GetArg("-blockminsize", 0);
4092 nBlockMinSize = std::min(nBlockMaxSize, nBlockMinSize);
4094 // Fee-per-kilobyte amount considered the same as "free"
4095 // Be careful setting this: if you set it to zero then
4096 // a transaction spammer can cheaply fill blocks using
4097 // 1-satoshi-fee transactions. It should be set above the real
4098 // cost to you of processing a transaction.
4099 int64 nMinTxFee = MIN_TX_FEE;
4100 if (mapArgs.count("-mintxfee"))
4101 ParseMoney(mapArgs["-mintxfee"], nMinTxFee);
4103 // ppcoin: if coinstake available add coinstake tx
4104 static int64 nLastCoinStakeSearchTime = GetAdjustedTime(); // only initialized at startup
4105 CBlockIndex* pindexPrev = pindexBest;
4107 if (fProofOfStake) // attempt to find a coinstake
4109 pblock->nBits = GetNextTargetRequired(pindexPrev, true);
4110 CTransaction txCoinStake;
4111 int64 nSearchTime = txCoinStake.nTime; // search to current time
4112 if (nSearchTime > nLastCoinStakeSearchTime)
4114 if (pwallet->CreateCoinStake(*pwallet, pblock->nBits, nSearchTime-nLastCoinStakeSearchTime, txCoinStake))
4116 if (txCoinStake.nTime >= max(pindexPrev->GetMedianTimePast()+1, pindexPrev->GetBlockTime() - nMaxClockDrift))
4117 { // make sure coinstake would meet timestamp protocol
4118 // as it would be the same as the block timestamp
4119 pblock->vtx[0].vout[0].SetEmpty();
4120 pblock->vtx[0].nTime = txCoinStake.nTime;
4121 pblock->vtx.push_back(txCoinStake);
4124 nLastCoinStakeSearchInterval = nSearchTime - nLastCoinStakeSearchTime;
4125 nLastCoinStakeSearchTime = nSearchTime;
4129 pblock->nBits = GetNextTargetRequired(pindexPrev, pblock->IsProofOfStake());
4131 // Collect memory pool transactions into the block
4134 LOCK2(cs_main, mempool.cs);
4135 CBlockIndex* pindexPrev = pindexBest;
4138 // Priority order to process transactions
4139 list<COrphan> vOrphan; // list memory doesn't move
4140 map<uint256, vector<COrphan*> > mapDependers;
4142 // This vector will be sorted into a priority queue:
4143 vector<TxPriority> vecPriority;
4144 vecPriority.reserve(mempool.mapTx.size());
4145 for (map<uint256, CTransaction>::iterator mi = mempool.mapTx.begin(); mi != mempool.mapTx.end(); ++mi)
4147 CTransaction& tx = (*mi).second;
4148 if (tx.IsCoinBase() || tx.IsCoinStake() || !tx.IsFinal())
4151 COrphan* porphan = NULL;
4152 double dPriority = 0;
4154 bool fMissingInputs = false;
4155 BOOST_FOREACH(const CTxIn& txin, tx.vin)
4157 // Read prev transaction
4158 CTransaction txPrev;
4160 if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
4162 // This should never happen; all transactions in the memory
4163 // pool should connect to either transactions in the chain
4164 // or other transactions in the memory pool.
4165 if (!mempool.mapTx.count(txin.prevout.hash))
4167 printf("ERROR: mempool transaction missing input\n");
4168 if (fDebug) assert("mempool transaction missing input" == 0);
4169 fMissingInputs = true;
4175 // Has to wait for dependencies
4178 // Use list for automatic deletion
4179 vOrphan.push_back(COrphan(&tx));
4180 porphan = &vOrphan.back();
4182 mapDependers[txin.prevout.hash].push_back(porphan);
4183 porphan->setDependsOn.insert(txin.prevout.hash);
4184 nTotalIn += mempool.mapTx[txin.prevout.hash].vout[txin.prevout.n].nValue;
4187 int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
4188 nTotalIn += nValueIn;
4190 int nConf = txindex.GetDepthInMainChain();
4191 dPriority += (double)nValueIn * nConf;
4193 if (fMissingInputs) continue;
4195 // Priority is sum(valuein * age) / txsize
4196 unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
4197 dPriority /= nTxSize;
4199 // This is a more accurate fee-per-kilobyte than is used by the client code, because the
4200 // client code rounds up the size to the nearest 1K. That's good, because it gives an
4201 // incentive to create smaller transactions.
4202 double dFeePerKb = double(nTotalIn-tx.GetValueOut()) / (double(nTxSize)/1000.0);
4206 porphan->dPriority = dPriority;
4207 porphan->dFeePerKb = dFeePerKb;
4210 vecPriority.push_back(TxPriority(dPriority, dFeePerKb, &(*mi).second));
4213 // Collect transactions into block
4214 map<uint256, CTxIndex> mapTestPool;
4215 uint64 nBlockSize = 1000;
4216 uint64 nBlockTx = 0;
4217 int nBlockSigOps = 100;
4218 bool fSortedByFee = (nBlockPrioritySize <= 0);
4220 TxPriorityCompare comparer(fSortedByFee);
4221 std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
4223 while (!vecPriority.empty())
4225 // Take highest priority transaction off the priority queue:
4226 double dPriority = vecPriority.front().get<0>();
4227 double dFeePerKb = vecPriority.front().get<1>();
4228 CTransaction& tx = *(vecPriority.front().get<2>());
4230 std::pop_heap(vecPriority.begin(), vecPriority.end(), comparer);
4231 vecPriority.pop_back();
4234 unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
4235 if (nBlockSize + nTxSize >= nBlockMaxSize)
4238 // Legacy limits on sigOps:
4239 unsigned int nTxSigOps = tx.GetLegacySigOpCount();
4240 if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
4244 if (tx.nTime > GetAdjustedTime() || (pblock->IsProofOfStake() && tx.nTime > pblock->vtx[1].nTime))
4247 // ppcoin: simplify transaction fee - allow free = false
4248 int64 nMinFee = tx.GetMinFee(nBlockSize, false, GMF_BLOCK);
4250 // Skip free transactions if we're past the minimum block size:
4251 if (fSortedByFee && (dFeePerKb < nMinTxFee) && (nBlockSize + nTxSize >= nBlockMinSize))
4254 // Prioritize by fee once past the priority size or we run out of high-priority
4256 if (!fSortedByFee &&
4257 ((nBlockSize + nTxSize >= nBlockPrioritySize) || (dPriority < COIN * 144 / 250)))
4259 fSortedByFee = true;
4260 comparer = TxPriorityCompare(fSortedByFee);
4261 std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
4264 // Connecting shouldn't fail due to dependency on other memory pool transactions
4265 // because we're already processing them in order of dependency
4266 map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
4267 MapPrevTx mapInputs;
4269 if (!tx.FetchInputs(txdb, mapTestPoolTmp, false, true, mapInputs, fInvalid))
4272 int64 nTxFees = tx.GetValueIn(mapInputs)-tx.GetValueOut();
4273 if (nTxFees < nMinFee)
4276 nTxSigOps += tx.GetP2SHSigOpCount(mapInputs);
4277 if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
4280 if (!tx.ConnectInputs(txdb, mapInputs, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, false, true))
4282 mapTestPoolTmp[tx.GetHash()] = CTxIndex(CDiskTxPos(1,1,1), tx.vout.size());
4283 swap(mapTestPool, mapTestPoolTmp);
4286 pblock->vtx.push_back(tx);
4287 nBlockSize += nTxSize;
4289 nBlockSigOps += nTxSigOps;
4292 if (fDebug && GetBoolArg("-printpriority"))
4294 printf("priority %.1f feeperkb %.1f txid %s\n",
4295 dPriority, dFeePerKb, tx.GetHash().ToString().c_str());
4298 // Add transactions that depend on this one to the priority queue
4299 uint256 hash = tx.GetHash();
4300 if (mapDependers.count(hash))
4302 BOOST_FOREACH(COrphan* porphan, mapDependers[hash])
4304 if (!porphan->setDependsOn.empty())
4306 porphan->setDependsOn.erase(hash);
4307 if (porphan->setDependsOn.empty())
4309 vecPriority.push_back(TxPriority(porphan->dPriority, porphan->dFeePerKb, porphan->ptx));
4310 std::push_heap(vecPriority.begin(), vecPriority.end(), comparer);
4317 nLastBlockTx = nBlockTx;
4318 nLastBlockSize = nBlockSize;
4320 if (fDebug && GetBoolArg("-printpriority"))
4321 printf("CreateNewBlock(): total size %"PRI64u"\n", nBlockSize);
4323 if (pblock->IsProofOfWork())
4324 pblock->vtx[0].vout[0].nValue = GetProofOfWorkReward(pblock->nBits);
4327 pblock->hashPrevBlock = pindexPrev->GetBlockHash();
4328 if (pblock->IsProofOfStake())
4329 pblock->nTime = pblock->vtx[1].nTime; //same as coinstake timestamp
4330 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, pblock->GetMaxTransactionTime());
4331 pblock->nTime = max(pblock->GetBlockTime(), pindexPrev->GetBlockTime() - nMaxClockDrift);
4332 if (pblock->IsProofOfWork())
4333 pblock->UpdateTime(pindexPrev);
4337 return pblock.release();
4341 void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
4343 // Update nExtraNonce
4344 static uint256 hashPrevBlock;
4345 if (hashPrevBlock != pblock->hashPrevBlock)
4348 hashPrevBlock = pblock->hashPrevBlock;
4351 unsigned int nHeight = pindexPrev->nHeight+1; // Height first in coinbase required for block.version=2
4352 pblock->vtx[0].vin[0].scriptSig = (CScript() << nHeight << CBigNum(nExtraNonce)) + COINBASE_FLAGS;
4353 assert(pblock->vtx[0].vin[0].scriptSig.size() <= 100);
4355 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
4359 void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
4362 // Pre-build hash buffers
4369 uint256 hashPrevBlock;
4370 uint256 hashMerkleRoot;
4373 unsigned int nNonce;
4376 unsigned char pchPadding0[64];
4378 unsigned char pchPadding1[64];
4381 memset(&tmp, 0, sizeof(tmp));
4383 tmp.block.nVersion = pblock->nVersion;
4384 tmp.block.hashPrevBlock = pblock->hashPrevBlock;
4385 tmp.block.hashMerkleRoot = pblock->hashMerkleRoot;
4386 tmp.block.nTime = pblock->nTime;
4387 tmp.block.nBits = pblock->nBits;
4388 tmp.block.nNonce = pblock->nNonce;
4390 FormatHashBlocks(&tmp.block, sizeof(tmp.block));
4391 FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
4393 // Byte swap all the input buffer
4394 for (unsigned int i = 0; i < sizeof(tmp)/4; i++)
4395 ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
4397 // Precalc the first half of the first hash, which stays constant
4398 SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
4400 memcpy(pdata, &tmp.block, 128);
4401 memcpy(phash1, &tmp.hash1, 64);
4405 bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
4407 uint256 hash = pblock->GetHash();
4408 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
4410 if (hash > hashTarget && pblock->IsProofOfWork())
4411 return error("BitcoinMiner : proof-of-work not meeting target");
4414 printf("BitcoinMiner:\n");
4415 printf("new block found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str());
4417 printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str());
4422 if (pblock->hashPrevBlock != hashBestChain)
4423 return error("BitcoinMiner : generated block is stale");
4425 // Remove key from key pool
4426 reservekey.KeepKey();
4428 // Track how many getdata requests this block gets
4430 LOCK(wallet.cs_wallet);
4431 wallet.mapRequestCount[pblock->GetHash()] = 0;
4434 // Process this block the same as if we had received it from another node
4435 if (!ProcessBlock(NULL, pblock))
4436 return error("BitcoinMiner : ProcessBlock, block not accepted");
4442 void BitcoinMiner(CWallet *pwallet, bool fProofOfStake)
4444 SetThreadPriority(THREAD_PRIORITY_LOWEST);
4446 // Make this thread recognisable as the mining thread
4447 RenameThread("bitcoin-miner");
4449 // Each thread has its own key and counter
4450 CReserveKey reservekey(pwallet);
4451 unsigned int nExtraNonce = 0;
4453 while (fProofOfStake)
4457 while (vNodes.empty() || IsInitialBlockDownload())
4466 while (pwallet->IsLocked())
4468 strMintWarning = strMintMessage;
4471 strMintWarning = "";
4476 CBlockIndex* pindexPrev = pindexBest;
4478 auto_ptr<CBlock> pblock(CreateNewBlock(pwallet, fProofOfStake));
4481 IncrementExtraNonce(pblock.get(), pindexPrev, nExtraNonce);
4485 // ppcoin: if proof-of-stake block found then process block
4486 if (pblock->IsProofOfStake())
4488 if (!pblock->SignBlock(*pwalletMain))
4490 strMintWarning = strMintMessage;
4493 strMintWarning = "";
4494 printf("StakeMiner : proof-of-stake block found %s\n", pblock->GetHash().ToString().c_str());
4495 SetThreadPriority(THREAD_PRIORITY_NORMAL);
4496 CheckWork(pblock.get(), *pwalletMain, reservekey);
4497 SetThreadPriority(THREAD_PRIORITY_LOWEST);