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"
12 #include "ui_interface.h"
13 #include "checkqueue.h"
15 #include <boost/algorithm/string/replace.hpp>
16 #include <boost/filesystem.hpp>
17 #include <boost/filesystem/fstream.hpp>
22 using namespace boost;
26 CCriticalSection cs_setpwalletRegistered;
27 set<CWallet*> setpwalletRegistered;
29 CCriticalSection cs_main;
32 unsigned int nTransactionsUpdated = 0;
34 map<uint256, CBlockIndex*> mapBlockIndex;
35 set<pair<COutPoint, unsigned int> > setStakeSeen;
37 CBigNum bnProofOfWorkLimit(~uint256(0) >> 20); // "standard" scrypt target limit for proof of work, results with 0,000244140625 proof-of-work difficulty
38 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
39 CBigNum bnProofOfStakeLimit(~uint256(0) >> 27); // proof of stake target limit since 20 June 2013, equal to 0.03125 proof of stake difficulty
40 CBigNum bnProofOfStakeHardLimit(~uint256(0) >> 30); // disabled temporarily, will be used in the future to fix minimal proof of stake difficulty at 0.25
41 uint256 nPoWBase = uint256("0x00000000ffff0000000000000000000000000000000000000000000000000000"); // difficulty-1 target
43 CBigNum bnProofOfWorkLimitTestNet(~uint256(0) >> 16);
45 unsigned int nStakeMinAge = 30 * nOneDay; // 30 days as zero time weight
46 unsigned int nStakeMaxAge = 90 * nOneDay; // 90 days as full weight
47 unsigned int nStakeTargetSpacing = 10 * 60; // 10-minute stakes spacing
48 unsigned int nModifierInterval = 6 * nOneHour; // time to elapse before new modifier is computed
50 int nCoinbaseMaturity = 500;
52 CBlockIndex* pindexGenesisBlock = NULL;
55 uint256 nBestChainTrust = 0;
56 uint256 nBestInvalidTrust = 0;
58 uint256 hashBestChain = 0;
59 CBlockIndex* pindexBest = NULL;
60 int64_t nTimeBestReceived = 0;
61 int nScriptCheckThreads = 0;
63 CMedianFilter<int> cPeerBlockCounts(5, 0); // Amount of blocks that other nodes claim to have
65 map<uint256, CBlock*> mapOrphanBlocks;
66 multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
67 set<pair<COutPoint, unsigned int> > setStakeSeenOrphan;
68 map<uint256, uint256> mapProofOfStake;
70 map<uint256, CTransaction> mapOrphanTransactions;
71 map<uint256, set<uint256> > mapOrphanTransactionsByPrev;
73 // Constant stuff for coinbase transactions we create:
74 CScript COINBASE_FLAGS;
76 const string strMessageMagic = "NovaCoin Signed Message:\n";
79 int64_t nTransactionFee = MIN_TX_FEE;
80 int64_t nMinimumInputValue = MIN_TXOUT_AMOUNT;
82 // Ping and address broadcast intervals
83 int64_t nPingInterval = 30 * 60;
84 int64_t nBroadcastInterval = nOneDay;
86 extern enum Checkpoints::CPMode CheckpointsMode;
88 //////////////////////////////////////////////////////////////////////////////
90 // dispatching functions
93 // These functions dispatch to one or all registered wallets
96 void RegisterWallet(CWallet* pwalletIn)
99 LOCK(cs_setpwalletRegistered);
100 setpwalletRegistered.insert(pwalletIn);
104 void UnregisterWallet(CWallet* pwalletIn)
107 LOCK(cs_setpwalletRegistered);
108 setpwalletRegistered.erase(pwalletIn);
112 // check whether the passed transaction is from us
113 bool static IsFromMe(CTransaction& tx)
115 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
116 if (pwallet->IsFromMe(tx))
121 // get the wallet transaction with the given hash (if it exists)
122 bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
124 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
125 if (pwallet->GetTransaction(hashTx,wtx))
130 // erases transaction with the given hash from all wallets
131 void static EraseFromWallets(uint256 hash)
133 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
134 pwallet->EraseFromWallet(hash);
137 // make sure all wallets know about the given transaction, in the given block
138 void SyncWithWallets(const CTransaction& tx, const CBlock* pblock, bool fUpdate, bool fConnect)
142 // wallets need to refund inputs when disconnecting coinstake
143 if (tx.IsCoinStake())
145 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
146 if (pwallet->IsFromMe(tx))
147 pwallet->DisableTransaction(tx);
152 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
153 pwallet->AddToWalletIfInvolvingMe(tx, pblock, fUpdate);
156 // notify wallets about a new best chain
157 void static SetBestChain(const CBlockLocator& loc)
159 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
160 pwallet->SetBestChain(loc);
163 // notify wallets about an updated transaction
164 void static UpdatedTransaction(const uint256& hashTx)
166 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
167 pwallet->UpdatedTransaction(hashTx);
171 void static PrintWallets(const CBlock& block)
173 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
174 pwallet->PrintWallet(block);
177 // notify wallets about an incoming inventory (for request counts)
178 void static Inventory(const uint256& hash)
180 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
181 pwallet->Inventory(hash);
184 // ask wallets to resend their transactions
185 void ResendWalletTransactions()
187 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
188 pwallet->ResendWalletTransactions();
197 //////////////////////////////////////////////////////////////////////////////
199 // mapOrphanTransactions
202 bool AddOrphanTx(const CTransaction& tx)
204 uint256 hash = tx.GetHash();
205 if (mapOrphanTransactions.count(hash))
208 // Ignore big transactions, to avoid a
209 // send-big-orphans memory exhaustion attack. If a peer has a legitimate
210 // large transaction with a missing parent then we assume
211 // it will rebroadcast it later, after the parent transaction(s)
212 // have been mined or received.
213 // 10,000 orphans, each of which is at most 5,000 bytes big is
214 // at most 500 megabytes of orphans:
216 size_t nSize = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
220 printf("ignoring large orphan tx (size: %" PRIszu ", hash: %s)\n", nSize, hash.ToString().substr(0,10).c_str());
224 mapOrphanTransactions[hash] = tx;
225 BOOST_FOREACH(const CTxIn& txin, tx.vin)
226 mapOrphanTransactionsByPrev[txin.prevout.hash].insert(hash);
228 printf("stored orphan tx %s (mapsz %" PRIszu ")\n", hash.ToString().substr(0,10).c_str(),
229 mapOrphanTransactions.size());
233 void static EraseOrphanTx(uint256 hash)
235 if (!mapOrphanTransactions.count(hash))
237 const CTransaction& tx = mapOrphanTransactions[hash];
238 BOOST_FOREACH(const CTxIn& txin, tx.vin)
240 mapOrphanTransactionsByPrev[txin.prevout.hash].erase(hash);
241 if (mapOrphanTransactionsByPrev[txin.prevout.hash].empty())
242 mapOrphanTransactionsByPrev.erase(txin.prevout.hash);
244 mapOrphanTransactions.erase(hash);
247 unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
249 unsigned int nEvicted = 0;
250 while (mapOrphanTransactions.size() > nMaxOrphans)
252 // Evict a random orphan:
253 uint256 randomhash = GetRandHash();
254 map<uint256, CTransaction>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
255 if (it == mapOrphanTransactions.end())
256 it = mapOrphanTransactions.begin();
257 EraseOrphanTx(it->first);
269 //////////////////////////////////////////////////////////////////////////////
271 // CTransaction and CTxIndex
274 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout, CTxIndex& txindexRet)
277 if (!txdb.ReadTxIndex(prevout.hash, txindexRet))
279 if (!ReadFromDisk(txindexRet.pos))
281 if (prevout.n >= vout.size())
289 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout)
292 return ReadFromDisk(txdb, prevout, txindex);
295 bool CTransaction::ReadFromDisk(COutPoint prevout)
299 return ReadFromDisk(txdb, prevout, txindex);
302 bool CTransaction::IsStandard(string& strReason) const
304 if (nVersion > CTransaction::CURRENT_VERSION)
306 strReason = "version";
310 unsigned int nDataOut = 0;
311 txnouttype whichType;
312 BOOST_FOREACH(const CTxIn& txin, vin)
314 // Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed
315 // keys. (remember the 520 byte limit on redeemScript size) That works
316 // out to a (15*(33+1))+3=513 byte redeemScript, 513+1+15*(73+1)=1624
317 // bytes of scriptSig, which we round off to 1650 bytes for some minor
318 // future-proofing. That's also enough to spend a 20-of-20
319 // CHECKMULTISIG scriptPubKey, though such a scriptPubKey is not
320 // considered standard)
321 if (txin.scriptSig.size() > 1650)
323 strReason = "scriptsig-size";
326 if (!txin.scriptSig.IsPushOnly())
328 strReason = "scriptsig-not-pushonly";
331 if (!txin.scriptSig.HasCanonicalPushes()) {
332 strReason = "txin-scriptsig-not-canonicalpushes";
336 BOOST_FOREACH(const CTxOut& txout, vout) {
337 if (!::IsStandard(txout.scriptPubKey, whichType)) {
338 strReason = "scriptpubkey";
341 if (whichType == TX_NULL_DATA)
344 if (txout.nValue == 0) {
345 strReason = "txout-value=0";
348 if (!txout.scriptPubKey.HasCanonicalPushes()) {
349 strReason = "txout-scriptsig-not-canonicalpushes";
355 // only one OP_RETURN txout is permitted
357 strReason = "multi-op-return";
365 // Check transaction inputs, and make sure any
366 // pay-to-script-hash transactions are evaluating IsStandard scripts
368 // Why bother? To avoid denial-of-service attacks; an attacker
369 // can submit a standard HASH... OP_EQUAL transaction,
370 // which will get accepted into blocks. The redemption
371 // script can be anything; an attacker could use a very
372 // expensive-to-check-upon-redemption script like:
373 // DUP CHECKSIG DROP ... repeated 100 times... OP_1
375 bool CTransaction::AreInputsStandard(const MapPrevTx& mapInputs) const
378 return true; // Coinbases don't use vin normally
380 for (unsigned int i = 0; i < vin.size(); i++)
382 const CTxOut& prev = GetOutputFor(vin[i], mapInputs);
384 vector<vector<unsigned char> > vSolutions;
385 txnouttype whichType;
386 // get the scriptPubKey corresponding to this input:
387 const CScript& prevScript = prev.scriptPubKey;
388 if (!Solver(prevScript, whichType, vSolutions))
390 int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
391 if (nArgsExpected < 0)
394 // Transactions with extra stuff in their scriptSigs are
395 // non-standard. Note that this EvalScript() call will
396 // be quick, because if there are any operations
397 // beside "push data" in the scriptSig the
398 // IsStandard() call returns false
399 vector<vector<unsigned char> > stack;
400 if (!EvalScript(stack, vin[i].scriptSig, *this, i, false, 0))
403 if (whichType == TX_SCRIPTHASH)
407 CScript subscript(stack.back().begin(), stack.back().end());
408 vector<vector<unsigned char> > vSolutions2;
409 txnouttype whichType2;
410 if (!Solver(subscript, whichType2, vSolutions2))
412 if (whichType2 == TX_SCRIPTHASH)
416 tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
419 nArgsExpected += tmpExpected;
422 if (stack.size() != (unsigned int)nArgsExpected)
430 CTransaction::GetLegacySigOpCount() const
432 unsigned int nSigOps = 0;
433 if (!IsCoinBase() || nTime < COINBASE_SIGOPS_SWITCH_TIME)
435 // Coinbase scriptsigs are never executed, so there is
436 // no sense in calculation of sigops.
437 BOOST_FOREACH(const CTxIn& txin, vin)
439 nSigOps += txin.scriptSig.GetSigOpCount(false);
442 BOOST_FOREACH(const CTxOut& txout, vout)
444 nSigOps += txout.scriptPubKey.GetSigOpCount(false);
450 int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
462 // Load the block this tx is in
464 if (!CTxDB("r").ReadTxIndex(GetHash(), txindex))
466 if (!blockTmp.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos))
471 // Update the tx's hashBlock
472 hashBlock = pblock->GetHash();
474 // Locate the transaction
475 for (nIndex = 0; nIndex < (int)pblock->vtx.size(); nIndex++)
476 if (pblock->vtx[nIndex] == *(CTransaction*)this)
478 if (nIndex == (int)pblock->vtx.size())
480 vMerkleBranch.clear();
482 printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
486 // Fill in merkle branch
487 vMerkleBranch = pblock->GetMerkleBranch(nIndex);
490 // Is the tx in a block that's in the main chain
491 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
492 if (mi == mapBlockIndex.end())
494 CBlockIndex* pindex = (*mi).second;
495 if (!pindex || !pindex->IsInMainChain())
498 return pindexBest->nHeight - pindex->nHeight + 1;
507 bool CTransaction::CheckTransaction() const
509 // Basic checks that don't depend on any context
511 return DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
513 return DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
515 if (::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
516 return DoS(100, error("CTransaction::CheckTransaction() : size limits failed"));
518 // Check for negative or overflow output values
519 int64_t nValueOut = 0;
520 for (unsigned int i = 0; i < vout.size(); i++)
522 const CTxOut& txout = vout[i];
523 if (txout.IsEmpty() && !IsCoinBase() && !IsCoinStake())
524 return DoS(100, error("CTransaction::CheckTransaction() : txout empty for user transaction"));
526 if (txout.nValue < 0)
527 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue is negative"));
528 if (txout.nValue > MAX_MONEY)
529 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
530 nValueOut += txout.nValue;
531 if (!MoneyRange(nValueOut))
532 return DoS(100, error("CTransaction::CheckTransaction() : txout total out of range"));
535 // Check for duplicate inputs
536 set<COutPoint> vInOutPoints;
537 BOOST_FOREACH(const CTxIn& txin, vin)
539 if (vInOutPoints.count(txin.prevout))
541 vInOutPoints.insert(txin.prevout);
546 if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
547 return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size is invalid"));
551 BOOST_FOREACH(const CTxIn& txin, vin)
552 if (txin.prevout.IsNull())
553 return DoS(10, error("CTransaction::CheckTransaction() : prevout is null"));
559 int64_t CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree, enum GetMinFee_mode mode, unsigned int nBytes) const
561 int64_t nMinTxFee = MIN_TX_FEE, nMinRelayTxFee = MIN_RELAY_TX_FEE;
565 // Enforce 0.01 as minimum fee for coinstake
567 nMinRelayTxFee = CENT;
570 // Base fee is either nMinTxFee or nMinRelayTxFee
571 int64_t nBaseFee = (mode == GMF_RELAY) ? nMinRelayTxFee : nMinTxFee;
573 unsigned int nNewBlockSize = nBlockSize + nBytes;
574 int64_t nMinFee = (1 + (int64_t)nBytes / 1000) * nBaseFee;
580 // Transactions under 1K are free
586 // Free transaction area
587 if (nNewBlockSize < 27000)
592 // To limit dust spam, require additional MIN_TX_FEE/MIN_RELAY_TX_FEE for
593 // each non empty output which is less than 0.01
595 // It's safe to ignore empty outputs here, because these inputs are allowed
596 // only for coinbase and coinstake transactions.
597 BOOST_FOREACH(const CTxOut& txout, vout)
598 if (txout.nValue < CENT && !txout.IsEmpty())
601 // Raise the price as the block approaches full
602 if (nBlockSize != 1 && nNewBlockSize >= MAX_BLOCK_SIZE_GEN/2)
604 if (nNewBlockSize >= MAX_BLOCK_SIZE_GEN)
606 nMinFee *= MAX_BLOCK_SIZE_GEN / (MAX_BLOCK_SIZE_GEN - nNewBlockSize);
609 if (!MoneyRange(nMinFee))
616 bool CTxMemPool::accept(CTxDB& txdb, CTransaction &tx, bool fCheckInputs,
617 bool* pfMissingInputs)
620 *pfMissingInputs = false;
622 if (!tx.CheckTransaction())
623 return error("CTxMemPool::accept() : CheckTransaction failed");
625 // Coinbase is only valid in a block, not as a loose transaction
627 return tx.DoS(100, error("CTxMemPool::accept() : coinbase as individual tx"));
629 // ppcoin: coinstake is also only valid in a block, not as a loose transaction
630 if (tx.IsCoinStake())
631 return tx.DoS(100, error("CTxMemPool::accept() : coinstake as individual tx"));
633 // To help v0.1.5 clients who would see it as a negative number
634 if ((int64_t)tx.nLockTime > std::numeric_limits<int>::max())
635 return error("CTxMemPool::accept() : not accepting nLockTime beyond 2038 yet");
637 // Rather not work on nonstandard transactions (unless -testnet)
639 if (!fTestNet && !tx.IsStandard(strNonStd))
640 return error("CTxMemPool::accept() : nonstandard transaction (%s)", strNonStd.c_str());
642 // Do we already have it?
643 uint256 hash = tx.GetHash();
646 if (mapTx.count(hash))
650 if (txdb.ContainsTx(hash))
653 // Check for conflicts with in-memory transactions
654 CTransaction* ptxOld = NULL;
655 for (unsigned int i = 0; i < tx.vin.size(); i++)
657 COutPoint outpoint = tx.vin[i].prevout;
658 if (mapNextTx.count(outpoint))
660 // Disable replacement feature for now
663 // Allow replacing with a newer version of the same transaction
666 ptxOld = mapNextTx[outpoint].ptx;
667 if (ptxOld->IsFinal())
669 if (!tx.IsNewerThan(*ptxOld))
671 for (unsigned int i = 0; i < tx.vin.size(); i++)
673 COutPoint outpoint = tx.vin[i].prevout;
674 if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
684 map<uint256, CTxIndex> mapUnused;
685 bool fInvalid = false;
686 if (!tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
689 return error("CTxMemPool::accept() : FetchInputs found invalid tx %s", hash.ToString().substr(0,10).c_str());
691 *pfMissingInputs = true;
695 // Check for non-standard pay-to-script-hash in inputs
696 if (!tx.AreInputsStandard(mapInputs) && !fTestNet)
697 return error("CTxMemPool::accept() : nonstandard transaction input");
699 // Note: if you modify this code to accept non-standard transactions, then
700 // you should add code here to check that the transaction does a
701 // reasonable number of ECDSA signature verifications.
703 int64_t nFees = tx.GetValueIn(mapInputs)-tx.GetValueOut();
704 unsigned int nSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
706 // Don't accept it if it can't get into a block
707 int64_t txMinFee = tx.GetMinFee(1000, true, GMF_RELAY, nSize);
708 if (nFees < txMinFee)
709 return error("CTxMemPool::accept() : not enough fees %s, %" PRId64 " < %" PRId64,
710 hash.ToString().c_str(),
713 // Continuously rate-limit free transactions
714 // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
715 // be annoying or make others' transactions take longer to confirm.
716 if (nFees < MIN_RELAY_TX_FEE)
718 static CCriticalSection cs;
719 static double dFreeCount;
720 static int64_t nLastTime;
721 int64_t nNow = GetTime();
725 // Use an exponentially decaying ~10-minute window:
726 dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
728 // -limitfreerelay unit is thousand-bytes-per-minute
729 // At default rate it would take over a month to fill 1GB
730 if (dFreeCount > GetArg("-limitfreerelay", 15)*10*1000 && !IsFromMe(tx))
731 return error("CTxMemPool::accept() : free transaction rejected by rate limiter");
733 printf("Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
738 // Check against previous transactions
739 // This is done last to help prevent CPU exhaustion denial-of-service attacks.
740 if (!tx.ConnectInputs(txdb, mapInputs, mapUnused, CDiskTxPos(1,1,1), pindexBest, false, false, true, STRICT_FLAGS))
742 return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
746 // Store transaction in memory
751 printf("CTxMemPool::accept() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
754 addUnchecked(hash, tx);
757 ///// are we sure this is ok when loading transactions or restoring block txes
758 // If updated, erase old tx from wallet
760 EraseFromWallets(ptxOld->GetHash());
762 printf("CTxMemPool::accept() : accepted %s (poolsz %" PRIszu ")\n",
763 hash.ToString().substr(0,10).c_str(),
768 bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMissingInputs)
770 return mempool.accept(txdb, *this, fCheckInputs, pfMissingInputs);
773 bool CTxMemPool::addUnchecked(const uint256& hash, CTransaction &tx)
775 // Add to memory pool without checking anything. Don't call this directly,
776 // call CTxMemPool::accept to properly check the transaction first.
779 for (unsigned int i = 0; i < tx.vin.size(); i++)
780 mapNextTx[tx.vin[i].prevout] = CInPoint(&mapTx[hash], i);
781 nTransactionsUpdated++;
787 bool CTxMemPool::remove(CTransaction &tx)
789 // Remove transaction from memory pool
792 uint256 hash = tx.GetHash();
793 if (mapTx.count(hash))
795 BOOST_FOREACH(const CTxIn& txin, tx.vin)
796 mapNextTx.erase(txin.prevout);
798 nTransactionsUpdated++;
804 void CTxMemPool::clear()
809 ++nTransactionsUpdated;
812 void CTxMemPool::queryHashes(std::vector<uint256>& vtxid)
817 vtxid.reserve(mapTx.size());
818 for (map<uint256, CTransaction>::iterator mi = mapTx.begin(); mi != mapTx.end(); ++mi)
819 vtxid.push_back((*mi).first);
825 int CMerkleTx::GetDepthInMainChain(CBlockIndex* &pindexRet) const
827 if (hashBlock == 0 || nIndex == -1)
830 // Find the block it claims to be in
831 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
832 if (mi == mapBlockIndex.end())
834 CBlockIndex* pindex = (*mi).second;
835 if (!pindex || !pindex->IsInMainChain())
838 // Make sure the merkle branch connects to this block
839 if (!fMerkleVerified)
841 if (CBlock::CheckMerkleBranch(GetHash(), vMerkleBranch, nIndex) != pindex->hashMerkleRoot)
843 fMerkleVerified = true;
847 return pindexBest->nHeight - pindex->nHeight + 1;
851 int CMerkleTx::GetBlocksToMaturity() const
853 if (!(IsCoinBase() || IsCoinStake()))
855 return max(0, (nCoinbaseMaturity+20) - GetDepthInMainChain());
859 bool CMerkleTx::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs)
863 if (!IsInMainChain() && !ClientConnectInputs())
865 return CTransaction::AcceptToMemoryPool(txdb, false);
869 return CTransaction::AcceptToMemoryPool(txdb, fCheckInputs);
873 bool CMerkleTx::AcceptToMemoryPool()
876 return AcceptToMemoryPool(txdb);
881 bool CWalletTx::AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs)
886 // Add previous supporting transactions first
887 BOOST_FOREACH(CMerkleTx& tx, vtxPrev)
889 if (!(tx.IsCoinBase() || tx.IsCoinStake()))
891 uint256 hash = tx.GetHash();
892 if (!mempool.exists(hash) && !txdb.ContainsTx(hash))
893 tx.AcceptToMemoryPool(txdb, fCheckInputs);
896 return AcceptToMemoryPool(txdb, fCheckInputs);
901 bool CWalletTx::AcceptWalletTransaction()
904 return AcceptWalletTransaction(txdb);
907 int CTxIndex::GetDepthInMainChain() const
911 if (!block.ReadFromDisk(pos.nFile, pos.nBlockPos, false))
913 // Find the block in the index
914 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(block.GetHash());
915 if (mi == mapBlockIndex.end())
917 CBlockIndex* pindex = (*mi).second;
918 if (!pindex || !pindex->IsInMainChain())
920 return 1 + nBestHeight - pindex->nHeight;
923 // Return transaction in tx, and if it was found inside a block, its hash is placed in hashBlock
924 bool GetTransaction(const uint256 &hash, CTransaction &tx, uint256 &hashBlock)
930 if (mempool.exists(hash))
932 tx = mempool.lookup(hash);
938 if (tx.ReadFromDisk(txdb, COutPoint(hash, 0), txindex))
941 if (block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
942 hashBlock = block.GetHash();
956 //////////////////////////////////////////////////////////////////////////////
958 // CBlock and CBlockIndex
961 static CBlockIndex* pblockindexFBBHLast;
962 CBlockIndex* FindBlockByHeight(int nHeight)
964 CBlockIndex *pblockindex;
965 if (nHeight < nBestHeight / 2)
966 pblockindex = pindexGenesisBlock;
968 pblockindex = pindexBest;
969 if (pblockindexFBBHLast && abs(nHeight - pblockindex->nHeight) > abs(nHeight - pblockindexFBBHLast->nHeight))
970 pblockindex = pblockindexFBBHLast;
971 while (pblockindex->nHeight > nHeight)
972 pblockindex = pblockindex->pprev;
973 while (pblockindex->nHeight < nHeight)
974 pblockindex = pblockindex->pnext;
975 pblockindexFBBHLast = pblockindex;
979 bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
981 if (!fReadTransactions)
983 *this = pindex->GetBlockHeader();
986 if (!ReadFromDisk(pindex->nFile, pindex->nBlockPos, fReadTransactions))
988 if (GetHash() != pindex->GetBlockHash())
989 return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
993 uint256 static GetOrphanRoot(const CBlock* pblock)
995 // Work back to the first block in the orphan chain
996 while (mapOrphanBlocks.count(pblock->hashPrevBlock))
997 pblock = mapOrphanBlocks[pblock->hashPrevBlock];
998 return pblock->GetHash();
1001 // ppcoin: find block wanted by given orphan block
1002 uint256 WantedByOrphan(const CBlock* pblockOrphan)
1004 // Work back to the first block in the orphan chain
1005 while (mapOrphanBlocks.count(pblockOrphan->hashPrevBlock))
1006 pblockOrphan = mapOrphanBlocks[pblockOrphan->hashPrevBlock];
1007 return pblockOrphan->hashPrevBlock;
1010 // select stake target limit according to hard-coded conditions
1011 CBigNum inline GetProofOfStakeLimit(int nHeight, unsigned int nTime)
1013 if(fTestNet) // separate proof of stake target limit for testnet
1014 return bnProofOfStakeLimit;
1015 if(nTime > TARGETS_SWITCH_TIME) // 27 bits since 20 July 2013
1016 return bnProofOfStakeLimit;
1017 if(nHeight + 1 > 15000) // 24 bits since block 15000
1018 return bnProofOfStakeLegacyLimit;
1019 if(nHeight + 1 > 14060) // 31 bits since block 14060 until 15000
1020 return bnProofOfStakeHardLimit;
1022 return bnProofOfWorkLimit; // return bnProofOfWorkLimit of none matched
1025 // miner's coin base reward based on nBits
1026 int64_t GetProofOfWorkReward(unsigned int nBits, int64_t nFees)
1028 CBigNum bnSubsidyLimit = MAX_MINT_PROOF_OF_WORK;
1031 bnTarget.SetCompact(nBits);
1032 CBigNum bnTargetLimit = bnProofOfWorkLimit;
1033 bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());
1035 // NovaCoin: subsidy is cut in half every 64x multiply of PoW difficulty
1036 // A reasonably continuous curve is used to avoid shock to market
1037 // (nSubsidyLimit / nSubsidy) ** 6 == bnProofOfWorkLimit / bnTarget
1039 // Human readable form:
1041 // nSubsidy = 100 / (diff ^ 1/6)
1043 // Please note that we're using bisection to find an approximate solutuion
1044 CBigNum bnLowerBound = CENT;
1045 CBigNum bnUpperBound = bnSubsidyLimit;
1046 while (bnLowerBound + CENT <= bnUpperBound)
1048 CBigNum bnMidValue = (bnLowerBound + bnUpperBound) / 2;
1049 if (bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnTargetLimit > bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnTarget)
1050 bnUpperBound = bnMidValue;
1052 bnLowerBound = bnMidValue;
1055 int64_t nSubsidy = bnUpperBound.getuint64();
1057 nSubsidy = (nSubsidy / CENT) * CENT;
1058 if (fDebug && GetBoolArg("-printcreation"))
1059 printf("GetProofOfWorkReward() : create=%s nBits=0x%08x nSubsidy=%" PRId64 "\n", FormatMoney(nSubsidy).c_str(), nBits, nSubsidy);
1061 return min(nSubsidy, MAX_MINT_PROOF_OF_WORK) + nFees;
1064 // miner's coin stake reward based on nBits and coin age spent (coin-days)
1065 int64_t GetProofOfStakeReward(int64_t nCoinAge, unsigned int nBits, int64_t nTime, bool bCoinYearOnly)
1067 int64_t nRewardCoinYear, nSubsidy, nSubsidyLimit = 10 * COIN;
1069 // Stage 2 of emission process is mostly PoS-based.
1071 CBigNum bnRewardCoinYearLimit = MAX_MINT_PROOF_OF_STAKE; // Base stake mint rate, 100% year interest
1073 bnTarget.SetCompact(nBits);
1074 CBigNum bnTargetLimit = GetProofOfStakeLimit(0, nTime);
1075 bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());
1077 // A reasonably continuous curve is used to avoid shock to market
1079 CBigNum bnLowerBound = 1 * CENT, // Lower interest bound is 1% per year
1080 bnUpperBound = bnRewardCoinYearLimit, // Upper interest bound is 100% per year
1081 bnMidPart, bnRewardPart;
1083 while (bnLowerBound + CENT <= bnUpperBound)
1085 CBigNum bnMidValue = (bnLowerBound + bnUpperBound) / 2;
1088 // Reward for coin-year is cut in half every 8x multiply of PoS difficulty
1090 // (nRewardCoinYearLimit / nRewardCoinYear) ** 3 == bnProofOfStakeLimit / bnTarget
1092 // Human readable form: nRewardCoinYear = 1 / (posdiff ^ 1/3)
1095 bnMidPart = bnMidValue * bnMidValue * bnMidValue;
1096 bnRewardPart = bnRewardCoinYearLimit * bnRewardCoinYearLimit * bnRewardCoinYearLimit;
1098 if (bnMidPart * bnTargetLimit > bnRewardPart * bnTarget)
1099 bnUpperBound = bnMidValue;
1101 bnLowerBound = bnMidValue;
1104 nRewardCoinYear = bnUpperBound.getuint64();
1105 nRewardCoinYear = min((nRewardCoinYear / CENT) * CENT, MAX_MINT_PROOF_OF_STAKE);
1108 return nRewardCoinYear;
1110 nSubsidy = nCoinAge * nRewardCoinYear * 33 / (365 * 33 + 8);
1112 // Set reasonable reward limit for large inputs
1114 // This will stimulate large holders to use smaller inputs, that's good for the network protection
1116 if (fDebug && GetBoolArg("-printcreation") && nSubsidyLimit < nSubsidy)
1117 printf("GetProofOfStakeReward(): %s is greater than %s, coinstake reward will be truncated\n", FormatMoney(nSubsidy).c_str(), FormatMoney(nSubsidyLimit).c_str());
1119 nSubsidy = min(nSubsidy, nSubsidyLimit);
1121 if (fDebug && GetBoolArg("-printcreation"))
1122 printf("GetProofOfStakeReward(): create=%s nCoinAge=%" PRId64 " nBits=%d\n", FormatMoney(nSubsidy).c_str(), nCoinAge, nBits);
1127 static const int64_t nTargetTimespan = 7 * nOneDay; // one week
1129 // get proof of work blocks max spacing according to hard-coded conditions
1130 int64_t inline GetTargetSpacingWorkMax(int nHeight, unsigned int nTime)
1132 if(nTime > TARGETS_SWITCH_TIME)
1133 return 3 * nStakeTargetSpacing; // 30 minutes on mainNet since 20 Jul 2013 00:00:00
1136 return 3 * nStakeTargetSpacing; // 15 minutes on testNet
1138 return 12 * nStakeTargetSpacing; // 2 hours otherwise
1142 // maximum nBits value could possible be required nTime after
1144 unsigned int ComputeMaxBits(CBigNum bnTargetLimit, unsigned int nBase, int64_t nTime)
1147 bnResult.SetCompact(nBase);
1149 while (nTime > 0 && bnResult < bnTargetLimit)
1151 // Maximum 200% adjustment per day...
1155 if (bnResult > bnTargetLimit)
1156 bnResult = bnTargetLimit;
1157 return bnResult.GetCompact();
1161 // minimum amount of work that could possibly be required nTime after
1162 // minimum proof-of-work required was nBase
1164 unsigned int ComputeMinWork(unsigned int nBase, int64_t nTime)
1166 return ComputeMaxBits(bnProofOfWorkLimit, nBase, nTime);
1170 // minimum amount of stake that could possibly be required nTime after
1171 // minimum proof-of-stake required was nBase
1173 unsigned int ComputeMinStake(unsigned int nBase, int64_t nTime, unsigned int nBlockTime)
1175 return ComputeMaxBits(GetProofOfStakeLimit(0, nBlockTime), nBase, nTime);
1179 // ppcoin: find last block index up to pindex
1180 const CBlockIndex* GetLastBlockIndex(const CBlockIndex* pindex, bool fProofOfStake)
1182 while (pindex && pindex->pprev && (pindex->IsProofOfStake() != fProofOfStake))
1183 pindex = pindex->pprev;
1187 unsigned int GetNextTargetRequired(const CBlockIndex* pindexLast, bool fProofOfStake)
1189 CBigNum bnTargetLimit = !fProofOfStake ? bnProofOfWorkLimit : GetProofOfStakeLimit(pindexLast->nHeight, pindexLast->nTime);
1191 if (pindexLast == NULL)
1192 return bnTargetLimit.GetCompact(); // genesis block
1194 const CBlockIndex* pindexPrev = GetLastBlockIndex(pindexLast, fProofOfStake);
1195 if (pindexPrev->pprev == NULL)
1196 return bnTargetLimit.GetCompact(); // first block
1197 const CBlockIndex* pindexPrevPrev = GetLastBlockIndex(pindexPrev->pprev, fProofOfStake);
1198 if (pindexPrevPrev->pprev == NULL)
1199 return bnTargetLimit.GetCompact(); // second block
1201 int64_t nActualSpacing = pindexPrev->GetBlockTime() - pindexPrevPrev->GetBlockTime();
1203 // ppcoin: target change every block
1204 // ppcoin: retarget with exponential moving toward target spacing
1206 bnNew.SetCompact(pindexPrev->nBits);
1207 int64_t nTargetSpacing = fProofOfStake? nStakeTargetSpacing : min(GetTargetSpacingWorkMax(pindexLast->nHeight, pindexLast->nTime), (int64_t) nStakeTargetSpacing * (1 + pindexLast->nHeight - pindexPrev->nHeight));
1208 int64_t nInterval = nTargetTimespan / nTargetSpacing;
1209 bnNew *= ((nInterval - 1) * nTargetSpacing + nActualSpacing + nActualSpacing);
1210 bnNew /= ((nInterval + 1) * nTargetSpacing);
1212 if (bnNew > bnTargetLimit)
1213 bnNew = bnTargetLimit;
1215 return bnNew.GetCompact();
1218 bool CheckProofOfWork(uint256 hash, unsigned int nBits)
1221 bnTarget.SetCompact(nBits);
1224 if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
1225 return error("CheckProofOfWork() : nBits below minimum work");
1227 // Check proof of work matches claimed amount
1228 if (hash > bnTarget.getuint256())
1229 return error("CheckProofOfWork() : hash doesn't match nBits");
1234 // Return maximum amount of blocks that other nodes claim to have
1235 int GetNumBlocksOfPeers()
1237 return std::max(cPeerBlockCounts.median(), Checkpoints::GetTotalBlocksEstimate());
1240 bool IsInitialBlockDownload()
1242 if (pindexBest == NULL || nBestHeight < Checkpoints::GetTotalBlocksEstimate())
1244 static int64_t nLastUpdate;
1245 static CBlockIndex* pindexLastBest;
1246 int64_t nCurrentTime = GetTime();
1247 if (pindexBest != pindexLastBest)
1249 pindexLastBest = pindexBest;
1250 nLastUpdate = nCurrentTime;
1252 return (nCurrentTime - nLastUpdate < 10 &&
1253 pindexBest->GetBlockTime() < nCurrentTime - nOneDay);
1256 void static InvalidChainFound(CBlockIndex* pindexNew)
1258 if (pindexNew->nChainTrust > nBestInvalidTrust)
1260 nBestInvalidTrust = pindexNew->nChainTrust;
1261 CTxDB().WriteBestInvalidTrust(CBigNum(nBestInvalidTrust));
1262 uiInterface.NotifyBlocksChanged();
1265 uint256 nBestInvalidBlockTrust = pindexNew->nChainTrust - pindexNew->pprev->nChainTrust;
1266 uint256 nBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->nChainTrust - pindexBest->pprev->nChainTrust) : pindexBest->nChainTrust;
1268 printf("InvalidChainFound: invalid block=%s height=%d trust=%s blocktrust=%" PRId64 " date=%s\n",
1269 pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight,
1270 CBigNum(pindexNew->nChainTrust).ToString().c_str(), nBestInvalidBlockTrust.Get64(),
1271 DateTimeStrFormat("%x %H:%M:%S", pindexNew->GetBlockTime()).c_str());
1272 printf("InvalidChainFound: current best=%s height=%d trust=%s blocktrust=%" PRId64 " date=%s\n",
1273 hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
1274 CBigNum(pindexBest->nChainTrust).ToString().c_str(),
1275 nBestBlockTrust.Get64(),
1276 DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
1280 void CBlock::UpdateTime(const CBlockIndex* pindexPrev)
1282 nTime = max(GetBlockTime(), GetAdjustedTime());
1295 bool CTransaction::DisconnectInputs(CTxDB& txdb)
1297 // Relinquish previous transactions' spent pointers
1300 BOOST_FOREACH(const CTxIn& txin, vin)
1302 COutPoint prevout = txin.prevout;
1304 // Get prev txindex from disk
1306 if (!txdb.ReadTxIndex(prevout.hash, txindex))
1307 return error("DisconnectInputs() : ReadTxIndex failed");
1309 if (prevout.n >= txindex.vSpent.size())
1310 return error("DisconnectInputs() : prevout.n out of range");
1312 // Mark outpoint as not spent
1313 txindex.vSpent[prevout.n].SetNull();
1316 if (!txdb.UpdateTxIndex(prevout.hash, txindex))
1317 return error("DisconnectInputs() : UpdateTxIndex failed");
1321 // Remove transaction from index
1322 // This can fail if a duplicate of this transaction was in a chain that got
1323 // reorganized away. This is only possible if this transaction was completely
1324 // spent, so erasing it would be a no-op anyway.
1325 txdb.EraseTxIndex(*this);
1331 bool CTransaction::FetchInputs(CTxDB& txdb, const map<uint256, CTxIndex>& mapTestPool,
1332 bool fBlock, bool fMiner, MapPrevTx& inputsRet, bool& fInvalid)
1334 // FetchInputs can return false either because we just haven't seen some inputs
1335 // (in which case the transaction should be stored as an orphan)
1336 // or because the transaction is malformed (in which case the transaction should
1337 // be dropped). If tx is definitely invalid, fInvalid will be set to true.
1341 return true; // Coinbase transactions have no inputs to fetch.
1343 for (unsigned int i = 0; i < vin.size(); i++)
1345 COutPoint prevout = vin[i].prevout;
1346 if (inputsRet.count(prevout.hash))
1347 continue; // Got it already
1350 CTxIndex& txindex = inputsRet[prevout.hash].first;
1352 if ((fBlock || fMiner) && mapTestPool.count(prevout.hash))
1354 // Get txindex from current proposed changes
1355 txindex = mapTestPool.find(prevout.hash)->second;
1359 // Read txindex from txdb
1360 fFound = txdb.ReadTxIndex(prevout.hash, txindex);
1362 if (!fFound && (fBlock || fMiner))
1363 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());
1366 CTransaction& txPrev = inputsRet[prevout.hash].second;
1367 if (!fFound || txindex.pos == CDiskTxPos(1,1,1))
1369 // Get prev tx from single transactions in memory
1372 if (!mempool.exists(prevout.hash))
1373 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());
1374 txPrev = mempool.lookup(prevout.hash);
1377 txindex.vSpent.resize(txPrev.vout.size());
1381 // Get prev tx from disk
1382 if (!txPrev.ReadFromDisk(txindex.pos))
1383 return error("FetchInputs() : %s ReadFromDisk prev tx %s failed", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
1387 // Make sure all prevout.n indexes are valid:
1388 for (unsigned int i = 0; i < vin.size(); i++)
1390 const COutPoint prevout = vin[i].prevout;
1391 assert(inputsRet.count(prevout.hash) != 0);
1392 const CTxIndex& txindex = inputsRet[prevout.hash].first;
1393 const CTransaction& txPrev = inputsRet[prevout.hash].second;
1394 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
1396 // Revisit this if/when transaction replacement is implemented and allows
1399 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()));
1406 const CTxOut& CTransaction::GetOutputFor(const CTxIn& input, const MapPrevTx& inputs) const
1408 MapPrevTx::const_iterator mi = inputs.find(input.prevout.hash);
1409 if (mi == inputs.end())
1410 throw std::runtime_error("CTransaction::GetOutputFor() : prevout.hash not found");
1412 const CTransaction& txPrev = (mi->second).second;
1413 if (input.prevout.n >= txPrev.vout.size())
1414 throw std::runtime_error("CTransaction::GetOutputFor() : prevout.n out of range");
1416 return txPrev.vout[input.prevout.n];
1419 int64_t CTransaction::GetValueIn(const MapPrevTx& inputs) const
1424 int64_t nResult = 0;
1425 for (unsigned int i = 0; i < vin.size(); i++)
1427 nResult += GetOutputFor(vin[i], inputs).nValue;
1433 unsigned int CTransaction::GetP2SHSigOpCount(const MapPrevTx& inputs) const
1438 unsigned int nSigOps = 0;
1439 for (unsigned int i = 0; i < vin.size(); i++)
1441 const CTxOut& prevout = GetOutputFor(vin[i], inputs);
1442 if (prevout.scriptPubKey.IsPayToScriptHash())
1443 nSigOps += prevout.scriptPubKey.GetSigOpCount(vin[i].scriptSig);
1448 bool CScriptCheck::operator()() const {
1449 const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
1450 if (!VerifyScript(scriptSig, scriptPubKey, *ptxTo, nIn, nFlags, nHashType))
1451 return error("CScriptCheck() : %s VerifySignature failed", ptxTo->GetHash().ToString().substr(0,10).c_str());
1455 bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType)
1457 return CScriptCheck(txFrom, txTo, nIn, flags, nHashType)();
1460 bool CTransaction::ConnectInputs(CTxDB& txdb, MapPrevTx inputs, map<uint256, CTxIndex>& mapTestPool, const CDiskTxPos& posThisTx,
1461 const CBlockIndex* pindexBlock, bool fBlock, bool fMiner, bool fScriptChecks, unsigned int flags, std::vector<CScriptCheck> *pvChecks)
1463 // Take over previous transactions' spent pointers
1464 // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
1465 // fMiner is true when called from the internal bitcoin miner
1466 // ... both are false when called from CTransaction::AcceptToMemoryPool
1470 int64_t nValueIn = 0;
1472 for (unsigned int i = 0; i < vin.size(); i++)
1474 COutPoint prevout = vin[i].prevout;
1475 assert(inputs.count(prevout.hash) > 0);
1476 CTxIndex& txindex = inputs[prevout.hash].first;
1477 CTransaction& txPrev = inputs[prevout.hash].second;
1479 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
1480 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()));
1482 // If prev is coinbase or coinstake, check that it's matured
1483 if (txPrev.IsCoinBase() || txPrev.IsCoinStake())
1484 for (const CBlockIndex* pindex = pindexBlock; pindex && pindexBlock->nHeight - pindex->nHeight < nCoinbaseMaturity; pindex = pindex->pprev)
1485 if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
1486 return error("ConnectInputs() : tried to spend %s at depth %d", txPrev.IsCoinBase() ? "coinbase" : "coinstake", pindexBlock->nHeight - pindex->nHeight);
1488 // ppcoin: check transaction timestamp
1489 if (txPrev.nTime > nTime)
1490 return DoS(100, error("ConnectInputs() : transaction timestamp earlier than input transaction"));
1492 // Check for negative or overflow input values
1493 nValueIn += txPrev.vout[prevout.n].nValue;
1494 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
1495 return DoS(100, error("ConnectInputs() : txin values out of range"));
1500 pvChecks->reserve(vin.size());
1502 // The first loop above does all the inexpensive checks.
1503 // Only if ALL inputs pass do we perform expensive ECDSA signature checks.
1504 // Helps prevent CPU exhaustion attacks.
1505 for (unsigned int i = 0; i < vin.size(); i++)
1507 COutPoint prevout = vin[i].prevout;
1508 assert(inputs.count(prevout.hash) > 0);
1509 CTxIndex& txindex = inputs[prevout.hash].first;
1510 CTransaction& txPrev = inputs[prevout.hash].second;
1512 // Check for conflicts (double-spend)
1513 // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
1514 // for an attacker to attempt to split the network.
1515 if (!txindex.vSpent[prevout.n].IsNull())
1516 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());
1518 // Skip ECDSA signature verification when connecting blocks (fBlock=true)
1519 // before the last blockchain checkpoint. This is safe because block merkle hashes are
1520 // still computed and checked, and any change will be caught at the next checkpoint.
1524 CScriptCheck check(txPrev, *this, i, flags, 0);
1527 pvChecks->push_back(CScriptCheck());
1528 check.swap(pvChecks->back());
1532 if (flags & STRICT_FLAGS)
1534 // Don't trigger DoS code in case of STRICT_FLAGS caused failure.
1535 CScriptCheck check(txPrev, *this, i, flags & ~STRICT_FLAGS, 0);
1537 return error("ConnectInputs() : %s strict VerifySignature failed", GetHash().ToString().substr(0,10).c_str());
1539 return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
1543 // Mark outpoints as spent
1544 txindex.vSpent[prevout.n] = posThisTx;
1547 if (fBlock || fMiner)
1549 mapTestPool[prevout.hash] = txindex;
1555 if (nTime > Checkpoints::GetLastCheckpointTime())
1557 unsigned int nTxSize = GetSerializeSize(SER_NETWORK, PROTOCOL_VERSION);
1559 // coin stake tx earns reward instead of paying fee
1561 if (!GetCoinAge(txdb, nCoinAge))
1562 return error("ConnectInputs() : %s unable to get coin age for coinstake", GetHash().ToString().substr(0,10).c_str());
1564 int64_t nReward = GetValueOut() - nValueIn;
1565 int64_t nCalculatedReward = GetProofOfStakeReward(nCoinAge, pindexBlock->nBits, nTime) - GetMinFee(1, false, GMF_BLOCK, nTxSize) + CENT;
1567 if (nReward > nCalculatedReward)
1568 return DoS(100, error("ConnectInputs() : coinstake pays too much(actual=%" PRId64 " vs calculated=%" PRId64 ")", nReward, nCalculatedReward));
1573 if (nValueIn < GetValueOut())
1574 return DoS(100, error("ConnectInputs() : %s value in < value out", GetHash().ToString().substr(0,10).c_str()));
1576 // Tally transaction fees
1577 int64_t nTxFee = nValueIn - GetValueOut();
1579 return DoS(100, error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str()));
1582 if (!MoneyRange(nFees))
1583 return DoS(100, error("ConnectInputs() : nFees out of range"));
1591 bool CTransaction::ClientConnectInputs()
1596 // Take over previous transactions' spent pointers
1599 int64_t nValueIn = 0;
1600 for (unsigned int i = 0; i < vin.size(); i++)
1602 // Get prev tx from single transactions in memory
1603 COutPoint prevout = vin[i].prevout;
1604 if (!mempool.exists(prevout.hash))
1606 CTransaction& txPrev = mempool.lookup(prevout.hash);
1608 if (prevout.n >= txPrev.vout.size())
1612 if (!VerifySignature(txPrev, *this, i, SCRIPT_VERIFY_NOCACHE | SCRIPT_VERIFY_P2SH, 0))
1613 return error("ClientConnectInputs() : VerifySignature failed");
1615 ///// this is redundant with the mempool.mapNextTx stuff,
1616 ///// not sure which I want to get rid of
1617 ///// this has to go away now that posNext is gone
1618 // // Check for conflicts
1619 // if (!txPrev.vout[prevout.n].posNext.IsNull())
1620 // return error("ConnectInputs() : prev tx already used");
1622 // // Flag outpoints as used
1623 // txPrev.vout[prevout.n].posNext = posThisTx;
1625 nValueIn += txPrev.vout[prevout.n].nValue;
1627 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
1628 return error("ClientConnectInputs() : txin values out of range");
1630 if (GetValueOut() > nValueIn)
1640 bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
1642 // Disconnect in reverse order
1643 for (int i = vtx.size()-1; i >= 0; i--)
1644 if (!vtx[i].DisconnectInputs(txdb))
1647 // Update block index on disk without changing it in memory.
1648 // The memory index structure will be changed after the db commits.
1651 CDiskBlockIndex blockindexPrev(pindex->pprev);
1652 blockindexPrev.hashNext = 0;
1653 if (!txdb.WriteBlockIndex(blockindexPrev))
1654 return error("DisconnectBlock() : WriteBlockIndex failed");
1657 // ppcoin: clean up wallet after disconnecting coinstake
1658 BOOST_FOREACH(CTransaction& tx, vtx)
1659 SyncWithWallets(tx, this, false, false);
1664 static CCheckQueue<CScriptCheck> scriptcheckqueue(128);
1666 void ThreadScriptCheck(void*) {
1667 vnThreadsRunning[THREAD_SCRIPTCHECK]++;
1668 RenameThread("novacoin-scriptch");
1669 scriptcheckqueue.Thread();
1670 vnThreadsRunning[THREAD_SCRIPTCHECK]--;
1673 void ThreadScriptCheckQuit() {
1674 scriptcheckqueue.Quit();
1677 bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
1679 // Check it again in case a previous version let a bad block in, but skip BlockSig checking
1680 if (!CheckBlock(!fJustCheck, !fJustCheck, false))
1683 // Do not allow blocks that contain transactions which 'overwrite' older transactions,
1684 // unless those are already completely spent.
1685 // If such overwrites are allowed, coinbases and transactions depending upon those
1686 // can be duplicated to remove the ability to spend the first instance -- even after
1687 // being sent to another address.
1688 // See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
1689 // This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
1690 // already refuses previously-known transaction ids entirely.
1691 // This rule was originally applied all blocks whose timestamp was after March 15, 2012, 0:00 UTC.
1692 // Now that the whole chain is irreversibly beyond that time it is applied to all blocks except the
1693 // two in the chain that violate it. This prevents exploiting the issue against nodes in their
1694 // initial block download.
1695 bool fEnforceBIP30 = true; // Always active in NovaCoin
1696 bool fScriptChecks = pindex->nHeight >= Checkpoints::GetTotalBlocksEstimate();
1698 //// issue here: it doesn't know the version
1699 unsigned int nTxPos;
1701 // FetchInputs treats CDiskTxPos(1,1,1) as a special "refer to memorypool" indicator
1702 // 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
1705 nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK, CLIENT_VERSION) - (2 * GetSizeOfCompactSize(0)) + GetSizeOfCompactSize(vtx.size());
1707 map<uint256, CTxIndex> mapQueuedChanges;
1708 CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
1711 int64_t nValueIn = 0;
1712 int64_t nValueOut = 0;
1713 unsigned int nSigOps = 0;
1714 BOOST_FOREACH(CTransaction& tx, vtx)
1716 uint256 hashTx = tx.GetHash();
1718 if (fEnforceBIP30) {
1719 CTxIndex txindexOld;
1720 if (txdb.ReadTxIndex(hashTx, txindexOld)) {
1721 BOOST_FOREACH(CDiskTxPos &pos, txindexOld.vSpent)
1727 nSigOps += tx.GetLegacySigOpCount();
1728 if (nSigOps > MAX_BLOCK_SIGOPS)
1729 return DoS(100, error("ConnectBlock() : too many sigops"));
1731 CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
1733 nTxPos += ::GetSerializeSize(tx, SER_DISK, CLIENT_VERSION);
1735 MapPrevTx mapInputs;
1736 if (tx.IsCoinBase())
1737 nValueOut += tx.GetValueOut();
1741 if (!tx.FetchInputs(txdb, mapQueuedChanges, true, false, mapInputs, fInvalid))
1744 // Add in sigops done by pay-to-script-hash inputs;
1745 // this is to prevent a "rogue miner" from creating
1746 // an incredibly-expensive-to-validate block.
1747 nSigOps += tx.GetP2SHSigOpCount(mapInputs);
1748 if (nSigOps > MAX_BLOCK_SIGOPS)
1749 return DoS(100, error("ConnectBlock() : too many sigops"));
1751 int64_t nTxValueIn = tx.GetValueIn(mapInputs);
1752 int64_t nTxValueOut = tx.GetValueOut();
1753 nValueIn += nTxValueIn;
1754 nValueOut += nTxValueOut;
1755 if (!tx.IsCoinStake())
1756 nFees += nTxValueIn - nTxValueOut;
1758 std::vector<CScriptCheck> vChecks;
1759 if (!tx.ConnectInputs(txdb, mapInputs, mapQueuedChanges, posThisTx, pindex, true, false, fScriptChecks, SCRIPT_VERIFY_NOCACHE | SCRIPT_VERIFY_P2SH, nScriptCheckThreads ? &vChecks : NULL))
1761 control.Add(vChecks);
1764 mapQueuedChanges[hashTx] = CTxIndex(posThisTx, tx.vout.size());
1767 if (!control.Wait())
1768 return DoS(100, false);
1770 if (IsProofOfWork())
1772 int64_t nBlockReward = GetProofOfWorkReward(nBits, nFees);
1774 // Check coinbase reward
1775 if (vtx[0].GetValueOut() > nBlockReward)
1776 return error("CheckBlock() : coinbase reward exceeded (actual=%" PRId64 " vs calculated=%" PRId64 ")",
1777 vtx[0].GetValueOut(),
1781 // track money supply and mint amount info
1782 pindex->nMint = nValueOut - nValueIn + nFees;
1783 pindex->nMoneySupply = (pindex->pprev? pindex->pprev->nMoneySupply : 0) + nValueOut - nValueIn;
1784 if (!txdb.WriteBlockIndex(CDiskBlockIndex(pindex)))
1785 return error("Connect() : WriteBlockIndex for pindex failed");
1787 // fees are not collected by proof-of-stake miners
1788 // fees are destroyed to compensate the entire network
1789 if (fDebug && IsProofOfStake() && GetBoolArg("-printcreation"))
1790 printf("ConnectBlock() : destroy=%s nFees=%" PRId64 "\n", FormatMoney(nFees).c_str(), nFees);
1795 // Write queued txindex changes
1796 for (map<uint256, CTxIndex>::iterator mi = mapQueuedChanges.begin(); mi != mapQueuedChanges.end(); ++mi)
1798 if (!txdb.UpdateTxIndex((*mi).first, (*mi).second))
1799 return error("ConnectBlock() : UpdateTxIndex failed");
1802 // Update block index on disk without changing it in memory.
1803 // The memory index structure will be changed after the db commits.
1806 CDiskBlockIndex blockindexPrev(pindex->pprev);
1807 blockindexPrev.hashNext = pindex->GetBlockHash();
1808 if (!txdb.WriteBlockIndex(blockindexPrev))
1809 return error("ConnectBlock() : WriteBlockIndex failed");
1812 // Watch for transactions paying to me
1813 BOOST_FOREACH(CTransaction& tx, vtx)
1814 SyncWithWallets(tx, this, true);
1820 bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
1822 printf("REORGANIZE\n");
1825 CBlockIndex* pfork = pindexBest;
1826 CBlockIndex* plonger = pindexNew;
1827 while (pfork != plonger)
1829 while (plonger->nHeight > pfork->nHeight)
1830 if (!(plonger = plonger->pprev))
1831 return error("Reorganize() : plonger->pprev is null");
1832 if (pfork == plonger)
1834 if (!(pfork = pfork->pprev))
1835 return error("Reorganize() : pfork->pprev is null");
1838 // List of what to disconnect
1839 vector<CBlockIndex*> vDisconnect;
1840 for (CBlockIndex* pindex = pindexBest; pindex != pfork; pindex = pindex->pprev)
1841 vDisconnect.push_back(pindex);
1843 // List of what to connect
1844 vector<CBlockIndex*> vConnect;
1845 for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
1846 vConnect.push_back(pindex);
1847 reverse(vConnect.begin(), vConnect.end());
1849 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());
1850 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());
1852 // Disconnect shorter branch
1853 vector<CTransaction> vResurrect;
1854 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
1857 if (!block.ReadFromDisk(pindex))
1858 return error("Reorganize() : ReadFromDisk for disconnect failed");
1859 if (!block.DisconnectBlock(txdb, pindex))
1860 return error("Reorganize() : DisconnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
1862 // Queue memory transactions to resurrect
1863 BOOST_FOREACH(const CTransaction& tx, block.vtx)
1864 if (!(tx.IsCoinBase() || tx.IsCoinStake()))
1865 vResurrect.push_back(tx);
1868 // Connect longer branch
1869 vector<CTransaction> vDelete;
1870 for (unsigned int i = 0; i < vConnect.size(); i++)
1872 CBlockIndex* pindex = vConnect[i];
1874 if (!block.ReadFromDisk(pindex))
1875 return error("Reorganize() : ReadFromDisk for connect failed");
1876 if (!block.ConnectBlock(txdb, pindex))
1879 return error("Reorganize() : ConnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
1882 // Queue memory transactions to delete
1883 BOOST_FOREACH(const CTransaction& tx, block.vtx)
1884 vDelete.push_back(tx);
1886 if (!txdb.WriteHashBestChain(pindexNew->GetBlockHash()))
1887 return error("Reorganize() : WriteHashBestChain failed");
1889 // Make sure it's successfully written to disk before changing memory structure
1890 if (!txdb.TxnCommit())
1891 return error("Reorganize() : TxnCommit failed");
1893 // Disconnect shorter branch
1894 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
1896 pindex->pprev->pnext = NULL;
1898 // Connect longer branch
1899 BOOST_FOREACH(CBlockIndex* pindex, vConnect)
1901 pindex->pprev->pnext = pindex;
1903 // Resurrect memory transactions that were in the disconnected branch
1904 BOOST_FOREACH(CTransaction& tx, vResurrect)
1905 tx.AcceptToMemoryPool(txdb, false);
1907 // Delete redundant memory transactions that are in the connected branch
1908 BOOST_FOREACH(CTransaction& tx, vDelete)
1911 printf("REORGANIZE: done\n");
1917 // Called from inside SetBestChain: attaches a block to the new best chain being built
1918 bool CBlock::SetBestChainInner(CTxDB& txdb, CBlockIndex *pindexNew)
1920 uint256 hash = GetHash();
1922 // Adding to current best branch
1923 if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
1926 InvalidChainFound(pindexNew);
1929 if (!txdb.TxnCommit())
1930 return error("SetBestChain() : TxnCommit failed");
1932 // Add to current best branch
1933 pindexNew->pprev->pnext = pindexNew;
1935 // Delete redundant memory transactions
1936 BOOST_FOREACH(CTransaction& tx, vtx)
1942 bool CBlock::SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew)
1944 uint256 hash = GetHash();
1946 if (!txdb.TxnBegin())
1947 return error("SetBestChain() : TxnBegin failed");
1949 if (pindexGenesisBlock == NULL && hash == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
1951 txdb.WriteHashBestChain(hash);
1952 if (!txdb.TxnCommit())
1953 return error("SetBestChain() : TxnCommit failed");
1954 pindexGenesisBlock = pindexNew;
1956 else if (hashPrevBlock == hashBestChain)
1958 if (!SetBestChainInner(txdb, pindexNew))
1959 return error("SetBestChain() : SetBestChainInner failed");
1963 // the first block in the new chain that will cause it to become the new best chain
1964 CBlockIndex *pindexIntermediate = pindexNew;
1966 // list of blocks that need to be connected afterwards
1967 std::vector<CBlockIndex*> vpindexSecondary;
1969 // Reorganize is costly in terms of db load, as it works in a single db transaction.
1970 // Try to limit how much needs to be done inside
1971 while (pindexIntermediate->pprev && pindexIntermediate->pprev->nChainTrust > pindexBest->nChainTrust)
1973 vpindexSecondary.push_back(pindexIntermediate);
1974 pindexIntermediate = pindexIntermediate->pprev;
1977 if (!vpindexSecondary.empty())
1978 printf("Postponing %" PRIszu " reconnects\n", vpindexSecondary.size());
1980 // Switch to new best branch
1981 if (!Reorganize(txdb, pindexIntermediate))
1984 InvalidChainFound(pindexNew);
1985 return error("SetBestChain() : Reorganize failed");
1988 // Connect further blocks
1989 BOOST_REVERSE_FOREACH(CBlockIndex *pindex, vpindexSecondary)
1992 if (!block.ReadFromDisk(pindex))
1994 printf("SetBestChain() : ReadFromDisk failed\n");
1997 if (!txdb.TxnBegin()) {
1998 printf("SetBestChain() : TxnBegin 2 failed\n");
2001 // errors now are not fatal, we still did a reorganisation to a new chain in a valid way
2002 if (!block.SetBestChainInner(txdb, pindex))
2007 // Update best block in wallet (so we can detect restored wallets)
2008 bool fIsInitialDownload = IsInitialBlockDownload();
2009 if (!fIsInitialDownload)
2011 const CBlockLocator locator(pindexNew);
2012 ::SetBestChain(locator);
2016 hashBestChain = hash;
2017 pindexBest = pindexNew;
2018 pblockindexFBBHLast = NULL;
2019 nBestHeight = pindexBest->nHeight;
2020 nBestChainTrust = pindexNew->nChainTrust;
2021 nTimeBestReceived = GetTime();
2022 nTransactionsUpdated++;
2024 uint256 nBestBlockTrust = pindexBest->nHeight != 0 ? (pindexBest->nChainTrust - pindexBest->pprev->nChainTrust) : pindexBest->nChainTrust;
2026 printf("SetBestChain: new best=%s height=%d trust=%s blocktrust=%" PRId64 " date=%s\n",
2027 hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
2028 CBigNum(nBestChainTrust).ToString().c_str(),
2029 nBestBlockTrust.Get64(),
2030 DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
2032 // Check the version of the last 100 blocks to see if we need to upgrade:
2033 if (!fIsInitialDownload)
2036 const CBlockIndex* pindex = pindexBest;
2037 for (int i = 0; i < 100 && pindex != NULL; i++)
2039 if (pindex->nVersion > CBlock::CURRENT_VERSION)
2041 pindex = pindex->pprev;
2044 printf("SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, CBlock::CURRENT_VERSION);
2045 if (nUpgraded > 100/2)
2046 // strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
2047 strMiscWarning = _("Warning: This version is obsolete, upgrade required!");
2050 std::string strCmd = GetArg("-blocknotify", "");
2052 if (!fIsInitialDownload && !strCmd.empty())
2054 boost::replace_all(strCmd, "%s", hashBestChain.GetHex());
2055 boost::thread t(runCommand, strCmd); // thread runs free
2061 // ppcoin: total coin age spent in transaction, in the unit of coin-days.
2062 // Only those coins meeting minimum age requirement counts. As those
2063 // transactions not in main chain are not currently indexed so we
2064 // might not find out about their coin age. Older transactions are
2065 // guaranteed to be in main chain by sync-checkpoint. This rule is
2066 // introduced to help nodes establish a consistent view of the coin
2067 // age (trust score) of competing branches.
2068 bool CTransaction::GetCoinAge(CTxDB& txdb, uint64_t& nCoinAge) const
2070 CBigNum bnCentSecond = 0; // coin age in the unit of cent-seconds
2076 BOOST_FOREACH(const CTxIn& txin, vin)
2078 // First try finding the previous transaction in database
2079 CTransaction txPrev;
2081 if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
2082 continue; // previous transaction not in main chain
2083 if (nTime < txPrev.nTime)
2084 return false; // Transaction timestamp violation
2086 // Read block header
2088 if (!block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
2089 return false; // unable to read block of previous transaction
2090 if (block.GetBlockTime() + nStakeMinAge > nTime)
2091 continue; // only count coins meeting min age requirement
2093 int64_t nValueIn = txPrev.vout[txin.prevout.n].nValue;
2094 bnCentSecond += CBigNum(nValueIn) * (nTime-txPrev.nTime) / CENT;
2096 if (fDebug && GetBoolArg("-printcoinage"))
2097 printf("coin age nValueIn=%" PRId64 " nTimeDiff=%d bnCentSecond=%s\n", nValueIn, nTime - txPrev.nTime, bnCentSecond.ToString().c_str());
2100 CBigNum bnCoinDay = bnCentSecond * CENT / COIN / nOneDay;
2101 if (fDebug && GetBoolArg("-printcoinage"))
2102 printf("coin age bnCoinDay=%s\n", bnCoinDay.ToString().c_str());
2103 nCoinAge = bnCoinDay.getuint64();
2107 // ppcoin: total coin age spent in block, in the unit of coin-days.
2108 bool CBlock::GetCoinAge(uint64_t& nCoinAge) const
2113 BOOST_FOREACH(const CTransaction& tx, vtx)
2115 uint64_t nTxCoinAge;
2116 if (tx.GetCoinAge(txdb, nTxCoinAge))
2117 nCoinAge += nTxCoinAge;
2122 if (nCoinAge == 0) // block coin age minimum 1 coin-day
2124 if (fDebug && GetBoolArg("-printcoinage"))
2125 printf("block coin age total nCoinDays=%" PRId64 "\n", nCoinAge);
2129 bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
2131 // Check for duplicate
2132 uint256 hash = GetHash();
2133 if (mapBlockIndex.count(hash))
2134 return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
2136 // Construct new block index object
2137 CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
2139 return error("AddToBlockIndex() : new CBlockIndex failed");
2140 pindexNew->phashBlock = &hash;
2141 map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
2142 if (miPrev != mapBlockIndex.end())
2144 pindexNew->pprev = (*miPrev).second;
2145 pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
2148 // ppcoin: compute chain trust score
2149 pindexNew->nChainTrust = (pindexNew->pprev ? pindexNew->pprev->nChainTrust : 0) + pindexNew->GetBlockTrust();
2151 // ppcoin: compute stake entropy bit for stake modifier
2152 if (!pindexNew->SetStakeEntropyBit(GetStakeEntropyBit(pindexNew->nHeight)))
2153 return error("AddToBlockIndex() : SetStakeEntropyBit() failed");
2155 // ppcoin: record proof-of-stake hash value
2156 if (pindexNew->IsProofOfStake())
2158 if (!mapProofOfStake.count(hash))
2159 return error("AddToBlockIndex() : hashProofOfStake not found in map");
2160 pindexNew->hashProofOfStake = mapProofOfStake[hash];
2163 // ppcoin: compute stake modifier
2164 uint64_t nStakeModifier = 0;
2165 bool fGeneratedStakeModifier = false;
2166 if (!ComputeNextStakeModifier(pindexNew, nStakeModifier, fGeneratedStakeModifier))
2167 return error("AddToBlockIndex() : ComputeNextStakeModifier() failed");
2168 pindexNew->SetStakeModifier(nStakeModifier, fGeneratedStakeModifier);
2169 pindexNew->nStakeModifierChecksum = GetStakeModifierChecksum(pindexNew);
2170 if (!CheckStakeModifierCheckpoints(pindexNew->nHeight, pindexNew->nStakeModifierChecksum))
2171 return error("AddToBlockIndex() : Rejected by stake modifier checkpoint height=%d, modifier=0x%016" PRIx64, pindexNew->nHeight, nStakeModifier);
2173 // Add to mapBlockIndex
2174 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
2175 if (pindexNew->IsProofOfStake())
2176 setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
2177 pindexNew->phashBlock = &((*mi).first);
2179 // Write to disk block index
2181 if (!txdb.TxnBegin())
2183 txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
2184 if (!txdb.TxnCommit())
2188 if (pindexNew->nChainTrust > nBestChainTrust)
2189 if (!SetBestChain(txdb, pindexNew))
2192 if (pindexNew == pindexBest)
2194 // Notify UI to display prev block's coinbase if it was ours
2195 static uint256 hashPrevBestCoinBase;
2196 UpdatedTransaction(hashPrevBestCoinBase);
2197 hashPrevBestCoinBase = vtx[0].GetHash();
2200 static int8_t counter = 0;
2201 if( (++counter & 0x0F) == 0 || !IsInitialBlockDownload()) // repaint every 16 blocks if not in initial block download
2202 uiInterface.NotifyBlocksChanged();
2209 bool CBlock::CheckBlock(bool fCheckPOW, bool fCheckMerkleRoot, bool fCheckSig) const
2211 // These are checks that are independent of context
2212 // that can be verified before saving an orphan block.
2214 set<uint256> uniqueTx; // tx hashes
2215 unsigned int nSigOps = 0; // total sigops
2218 if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
2219 return DoS(100, error("CheckBlock() : size limits failed"));
2221 bool fProofOfStake = IsProofOfStake();
2223 // First transaction must be coinbase, the rest must not be
2224 if (!vtx[0].IsCoinBase())
2225 return DoS(100, error("CheckBlock() : first tx is not coinbase"));
2227 if (!vtx[0].CheckTransaction())
2228 return DoS(vtx[0].nDoS, error("CheckBlock() : CheckTransaction failed on coinbase"));
2230 uniqueTx.insert(vtx[0].GetHash());
2231 nSigOps += vtx[0].GetLegacySigOpCount();
2235 // Proof-of-STake related checkings. Note that we know here that 1st transactions is coinstake. We don't need
2236 // check the type of 1st transaction because it's performed earlier by IsProofOfStake()
2238 // nNonce must be zero for proof-of-stake blocks
2240 return DoS(100, error("CheckBlock() : non-zero nonce in proof-of-stake block"));
2242 // Coinbase output should be empty if proof-of-stake block
2243 if (vtx[0].vout.size() != 1 || !vtx[0].vout[0].IsEmpty())
2244 return DoS(100, error("CheckBlock() : coinbase output not empty for proof-of-stake block"));
2246 // Check coinstake timestamp
2247 if (GetBlockTime() != (int64_t)vtx[1].nTime)
2248 return DoS(50, error("CheckBlock() : coinstake timestamp violation nTimeBlock=%" PRId64 " nTimeTx=%u", GetBlockTime(), vtx[1].nTime));
2250 // NovaCoin: check proof-of-stake block signature
2251 if (fCheckSig && !CheckBlockSignature())
2252 return DoS(100, error("CheckBlock() : bad proof-of-stake block signature"));
2254 if (!vtx[1].CheckTransaction())
2255 return DoS(vtx[1].nDoS, error("CheckBlock() : CheckTransaction failed on coinstake"));
2257 uniqueTx.insert(vtx[1].GetHash());
2258 nSigOps += vtx[1].GetLegacySigOpCount();
2262 // Check proof of work matches claimed amount
2263 if (fCheckPOW && !CheckProofOfWork(GetHash(), nBits))
2264 return DoS(50, error("CheckBlock() : proof of work failed"));
2267 if (GetBlockTime() > FutureDrift(GetAdjustedTime()))
2268 return error("CheckBlock() : block timestamp too far in the future");
2270 // Check coinbase timestamp
2271 if (GetBlockTime() < PastDrift((int64_t)vtx[0].nTime))
2272 return DoS(50, error("CheckBlock() : coinbase timestamp is too late"));
2275 // Iterate all transactions starting from second for proof-of-stake block
2276 // or first for proof-of-work block
2277 for (unsigned int i = fProofOfStake ? 2 : 1; i < vtx.size(); i++)
2279 const CTransaction& tx = vtx[i];
2281 // Reject coinbase transactions at non-zero index
2282 if (tx.IsCoinBase())
2283 return DoS(100, error("CheckBlock() : coinbase at wrong index"));
2285 // Reject coinstake transactions at index != 1
2286 if (tx.IsCoinStake())
2287 return DoS(100, error("CheckBlock() : coinstake at wrong index"));
2289 // Check transaction timestamp
2290 if (GetBlockTime() < (int64_t)tx.nTime)
2291 return DoS(50, error("CheckBlock() : block timestamp earlier than transaction timestamp"));
2293 // Check transaction consistency
2294 if (!tx.CheckTransaction())
2295 return DoS(tx.nDoS, error("CheckBlock() : CheckTransaction failed"));
2297 // Add transaction hash into list of unique transaction IDs
2298 uniqueTx.insert(tx.GetHash());
2300 // Calculate sigops count
2301 nSigOps += tx.GetLegacySigOpCount();
2304 // Check for duplicate txids. This is caught by ConnectInputs(),
2305 // but catching it earlier avoids a potential DoS attack:
2306 if (uniqueTx.size() != vtx.size())
2307 return DoS(100, error("CheckBlock() : duplicate transaction"));
2309 // Reject block if validation would consume too much resources.
2310 if (nSigOps > MAX_BLOCK_SIGOPS)
2311 return DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"));
2313 // Check merkle root
2314 if (fCheckMerkleRoot && hashMerkleRoot != BuildMerkleTree())
2315 return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
2320 bool CBlock::AcceptBlock()
2322 // Check for duplicate
2323 uint256 hash = GetHash();
2324 if (mapBlockIndex.count(hash))
2325 return error("AcceptBlock() : block already in mapBlockIndex");
2327 // Get prev block index
2328 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
2329 if (mi == mapBlockIndex.end())
2330 return DoS(10, error("AcceptBlock() : prev block not found"));
2331 CBlockIndex* pindexPrev = (*mi).second;
2332 int nHeight = pindexPrev->nHeight+1;
2334 // Check proof-of-work or proof-of-stake
2335 if (nBits != GetNextTargetRequired(pindexPrev, IsProofOfStake()))
2336 return DoS(100, error("AcceptBlock() : incorrect %s", IsProofOfWork() ? "proof-of-work" : "proof-of-stake"));
2338 int64_t nMedianTimePast = pindexPrev->GetMedianTimePast();
2339 int nMaxOffset = 12 * 3600; // 12 hours
2340 if (pindexPrev->nTime < 1450569600)
2341 nMaxOffset = 7 * 86400; // One week until 20 Dec, 2015
2343 // Check timestamp against prev
2344 if (GetBlockTime() <= nMedianTimePast || FutureDrift(GetBlockTime()) < pindexPrev->GetBlockTime())
2345 return error("AcceptBlock() : block's timestamp is too early");
2347 // Don't accept blocks with future timestamps
2348 if (pindexPrev->nHeight > 1 && nMedianTimePast + nMaxOffset < GetBlockTime())
2349 return error("AcceptBlock() : block's timestamp is too far in the future");
2351 // Check that all transactions are finalized
2352 BOOST_FOREACH(const CTransaction& tx, vtx)
2353 if (!tx.IsFinal(nHeight, GetBlockTime()))
2354 return DoS(10, error("AcceptBlock() : contains a non-final transaction"));
2356 // Check that the block chain matches the known block chain up to a checkpoint
2357 if (!Checkpoints::CheckHardened(nHeight, hash))
2358 return DoS(100, error("AcceptBlock() : rejected by hardened checkpoint lock-in at %d", nHeight));
2360 bool cpSatisfies = Checkpoints::CheckSync(hash, pindexPrev);
2362 // Check that the block satisfies synchronized checkpoint
2363 if (CheckpointsMode == Checkpoints::STRICT && !cpSatisfies)
2364 return error("AcceptBlock() : rejected by synchronized checkpoint");
2366 if (CheckpointsMode == Checkpoints::ADVISORY && !cpSatisfies)
2367 strMiscWarning = _("WARNING: syncronized checkpoint violation detected, but skipped!");
2369 // Enforce rule that the coinbase starts with serialized block height
2370 CScript expect = CScript() << nHeight;
2371 if (vtx[0].vin[0].scriptSig.size() < expect.size() ||
2372 !std::equal(expect.begin(), expect.end(), vtx[0].vin[0].scriptSig.begin()))
2373 return DoS(100, error("AcceptBlock() : block height mismatch in coinbase"));
2375 // Write block to history file
2376 if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK, CLIENT_VERSION)))
2377 return error("AcceptBlock() : out of disk space");
2378 unsigned int nFile = std::numeric_limits<unsigned int>::max();
2379 unsigned int nBlockPos = 0;
2380 if (!WriteToDisk(nFile, nBlockPos))
2381 return error("AcceptBlock() : WriteToDisk failed");
2382 if (!AddToBlockIndex(nFile, nBlockPos))
2383 return error("AcceptBlock() : AddToBlockIndex failed");
2385 // Relay inventory, but don't relay old inventory during initial block download
2386 int nBlockEstimate = Checkpoints::GetTotalBlocksEstimate();
2387 if (hashBestChain == hash)
2390 BOOST_FOREACH(CNode* pnode, vNodes)
2391 if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate))
2392 pnode->PushInventory(CInv(MSG_BLOCK, hash));
2395 // ppcoin: check pending sync-checkpoint
2396 Checkpoints::AcceptPendingSyncCheckpoint();
2401 uint256 CBlockIndex::GetBlockTrust() const
2404 bnTarget.SetCompact(nBits);
2409 // Return 1 for the first 12 blocks
2410 if (pprev == NULL || pprev->nHeight < 12)
2413 const CBlockIndex* currentIndex = pprev;
2415 if(IsProofOfStake())
2417 CBigNum bnNewTrust = (CBigNum(1)<<256) / (bnTarget+1);
2419 // Return 1/3 of score if parent block is not the PoW block
2420 if (!pprev->IsProofOfWork())
2421 return (bnNewTrust / 3).getuint256();
2425 // Check last 12 blocks type
2426 while (pprev->nHeight - currentIndex->nHeight < 12)
2428 if (currentIndex->IsProofOfWork())
2430 currentIndex = currentIndex->pprev;
2433 // Return 1/3 of score if less than 3 PoW blocks found
2435 return (bnNewTrust / 3).getuint256();
2437 return bnNewTrust.getuint256();
2441 // Calculate work amount for block
2442 CBigNum bnPoWTrust = CBigNum(nPoWBase) / (bnTarget+1);
2444 // Set nPowTrust to 1 if PoW difficulty is too low
2448 CBigNum bnLastBlockTrust = CBigNum(pprev->nChainTrust - pprev->pprev->nChainTrust);
2450 // Return nPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
2451 if (!(pprev->IsProofOfStake() && pprev->pprev->IsProofOfStake()))
2452 return (bnPoWTrust + 2 * bnLastBlockTrust / 3).getuint256();
2456 // Check last 12 blocks type
2457 while (pprev->nHeight - currentIndex->nHeight < 12)
2459 if (currentIndex->IsProofOfStake())
2461 currentIndex = currentIndex->pprev;
2464 // Return nPoWTrust + 2/3 of previous block score if less than 7 PoS blocks found
2466 return (bnPoWTrust + 2 * bnLastBlockTrust / 3).getuint256();
2468 bnTarget.SetCompact(pprev->nBits);
2473 CBigNum bnNewTrust = (CBigNum(1)<<256) / (bnTarget+1);
2475 // Return nPoWTrust + full trust score for previous block nBits
2476 return (bnPoWTrust + bnNewTrust).getuint256();
2480 bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired, unsigned int nToCheck)
2482 unsigned int nFound = 0;
2483 for (unsigned int i = 0; i < nToCheck && nFound < nRequired && pstart != NULL; i++)
2485 if (pstart->nVersion >= minVersion)
2487 pstart = pstart->pprev;
2489 return (nFound >= nRequired);
2492 bool static ReserealizeBlockSignature(CBlock* pblock)
2494 if (pblock->IsProofOfWork())
2496 pblock->vchBlockSig.clear();
2500 return CKey::ReserealizeSignature(pblock->vchBlockSig);
2503 bool static IsCanonicalBlockSignature(CBlock* pblock)
2505 if (pblock->IsProofOfWork())
2506 return pblock->vchBlockSig.empty();
2508 return IsDERSignature(pblock->vchBlockSig);
2511 bool ProcessBlock(CNode* pfrom, CBlock* pblock)
2513 // Check for duplicate
2514 uint256 hash = pblock->GetHash();
2515 if (mapBlockIndex.count(hash))
2516 return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,20).c_str());
2517 if (mapOrphanBlocks.count(hash))
2518 return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,20).c_str());
2520 // Check proof-of-stake
2521 // Limited duplicity on stake: prevents block flood attack
2522 // Duplicate stake allowed only when there is orphan child block
2523 if (pblock->IsProofOfStake() && setStakeSeen.count(pblock->GetProofOfStake()) && !mapOrphanBlocksByPrev.count(hash) && !Checkpoints::WantedByPendingSyncCheckpoint(hash))
2524 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());
2526 // Strip the garbage from newly received blocks, if we found some
2527 if (!IsCanonicalBlockSignature(pblock)) {
2528 if (!ReserealizeBlockSignature(pblock))
2529 printf("WARNING: ProcessBlock() : ReserealizeBlockSignature FAILED\n");
2532 // Preliminary checks
2533 if (!pblock->CheckBlock(true, true, (pblock->nTime > Checkpoints::GetLastCheckpointTime())))
2534 return error("ProcessBlock() : CheckBlock FAILED");
2536 // ppcoin: verify hash target and signature of coinstake tx
2537 if (pblock->IsProofOfStake())
2539 uint256 hashProofOfStake = 0, targetProofOfStake = 0;
2540 if (!CheckProofOfStake(pblock->vtx[1], pblock->nBits, hashProofOfStake, targetProofOfStake))
2542 printf("WARNING: ProcessBlock(): check proof-of-stake failed for block %s\n", hash.ToString().c_str());
2543 return false; // do not error here as we expect this during initial block download
2545 if (!mapProofOfStake.count(hash)) // add to mapProofOfStake
2546 mapProofOfStake.insert(make_pair(hash, hashProofOfStake));
2549 CBlockIndex* pcheckpoint = Checkpoints::GetLastSyncCheckpoint();
2550 if (pcheckpoint && pblock->hashPrevBlock != hashBestChain && !Checkpoints::WantedByPendingSyncCheckpoint(hash))
2552 // Extra checks to prevent "fill up memory by spamming with bogus blocks"
2553 int64_t deltaTime = pblock->GetBlockTime() - pcheckpoint->nTime;
2555 bnNewBlock.SetCompact(pblock->nBits);
2558 if (pblock->IsProofOfStake())
2559 bnRequired.SetCompact(ComputeMinStake(GetLastBlockIndex(pcheckpoint, true)->nBits, deltaTime, pblock->nTime));
2561 bnRequired.SetCompact(ComputeMinWork(GetLastBlockIndex(pcheckpoint, false)->nBits, deltaTime));
2563 if (bnNewBlock > bnRequired)
2566 pfrom->Misbehaving(100);
2567 return error("ProcessBlock() : block with too little %s", pblock->IsProofOfStake()? "proof-of-stake" : "proof-of-work");
2571 // ppcoin: ask for pending sync-checkpoint if any
2572 if (!IsInitialBlockDownload())
2573 Checkpoints::AskForPendingSyncCheckpoint(pfrom);
2575 // If don't already have its previous block, shunt it off to holding area until we get it
2576 if (!mapBlockIndex.count(pblock->hashPrevBlock))
2578 printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
2579 // ppcoin: check proof-of-stake
2580 if (pblock->IsProofOfStake())
2582 // Limited duplicity on stake: prevents block flood attack
2583 // Duplicate stake allowed only when there is orphan child block
2584 if (setStakeSeenOrphan.count(pblock->GetProofOfStake()) && !mapOrphanBlocksByPrev.count(hash) && !Checkpoints::WantedByPendingSyncCheckpoint(hash))
2585 return error("ProcessBlock() : duplicate proof-of-stake (%s, %d) for orphan block %s", pblock->GetProofOfStake().first.ToString().c_str(), pblock->GetProofOfStake().second, hash.ToString().c_str());
2587 setStakeSeenOrphan.insert(pblock->GetProofOfStake());
2589 CBlock* pblock2 = new CBlock(*pblock);
2590 mapOrphanBlocks.insert(make_pair(hash, pblock2));
2591 mapOrphanBlocksByPrev.insert(make_pair(pblock2->hashPrevBlock, pblock2));
2593 // Ask this guy to fill in what we're missing
2596 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(pblock2));
2597 // ppcoin: getblocks may not obtain the ancestor block rejected
2598 // earlier by duplicate-stake check so we ask for it again directly
2599 if (!IsInitialBlockDownload())
2600 pfrom->AskFor(CInv(MSG_BLOCK, WantedByOrphan(pblock2)));
2606 if (!pblock->AcceptBlock())
2607 return error("ProcessBlock() : AcceptBlock FAILED");
2609 // Recursively process any orphan blocks that depended on this one
2610 vector<uint256> vWorkQueue;
2611 vWorkQueue.push_back(hash);
2612 for (unsigned int i = 0; i < vWorkQueue.size(); i++)
2614 uint256 hashPrev = vWorkQueue[i];
2615 for (multimap<uint256, CBlock*>::iterator mi = mapOrphanBlocksByPrev.lower_bound(hashPrev);
2616 mi != mapOrphanBlocksByPrev.upper_bound(hashPrev);
2619 CBlock* pblockOrphan = (*mi).second;
2620 if (pblockOrphan->AcceptBlock())
2621 vWorkQueue.push_back(pblockOrphan->GetHash());
2622 mapOrphanBlocks.erase(pblockOrphan->GetHash());
2623 setStakeSeenOrphan.erase(pblockOrphan->GetProofOfStake());
2624 delete pblockOrphan;
2626 mapOrphanBlocksByPrev.erase(hashPrev);
2629 printf("ProcessBlock: ACCEPTED\n");
2631 // ppcoin: if responsible for sync-checkpoint send it
2632 if (pfrom && !CSyncCheckpoint::strMasterPrivKey.empty())
2633 Checkpoints::SendSyncCheckpoint(Checkpoints::AutoSelectSyncCheckpoint());
2638 // ppcoin: check block signature
2639 bool CBlock::CheckBlockSignature() const
2641 if (vchBlockSig.empty())
2644 txnouttype whichType;
2645 vector<valtype> vSolutions;
2646 if (!Solver(vtx[1].vout[1].scriptPubKey, whichType, vSolutions))
2649 if (whichType == TX_PUBKEY)
2651 valtype& vchPubKey = vSolutions[0];
2653 if (!key.SetPubKey(vchPubKey))
2655 return key.Verify(GetHash(), vchBlockSig);
2661 bool CheckDiskSpace(uint64_t nAdditionalBytes)
2663 uint64_t nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
2665 // Check for nMinDiskSpace bytes (currently 50MB)
2666 if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
2669 string strMessage = _("Warning: Disk space is low!");
2670 strMiscWarning = strMessage;
2671 printf("*** %s\n", strMessage.c_str());
2672 uiInterface.ThreadSafeMessageBox(strMessage, "NovaCoin", CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
2679 static filesystem::path BlockFilePath(unsigned int nFile)
2681 string strBlockFn = strprintf("blk%04u.dat", nFile);
2682 return GetDataDir() / strBlockFn;
2685 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
2687 if ((nFile < 1) || (nFile == std::numeric_limits<uint32_t>::max()))
2689 FILE* file = fopen(BlockFilePath(nFile).string().c_str(), pszMode);
2692 if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))
2694 if (fseek(file, nBlockPos, SEEK_SET) != 0)
2703 static unsigned int nCurrentBlockFile = 1;
2705 FILE* AppendBlockFile(unsigned int& nFileRet)
2710 FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
2713 if (fseek(file, 0, SEEK_END) != 0)
2715 // FAT32 file size max 4GB, fseek and ftell max 2GB, so we must stay under 2GB
2716 if (ftell(file) < (long)(0x7F000000 - MAX_SIZE))
2718 nFileRet = nCurrentBlockFile;
2722 nCurrentBlockFile++;
2726 void UnloadBlockIndex()
2728 mapBlockIndex.clear();
2729 setStakeSeen.clear();
2730 pindexGenesisBlock = NULL;
2732 nBestChainTrust = 0;
2733 nBestInvalidTrust = 0;
2738 bool LoadBlockIndex(bool fAllowNew)
2742 pchMessageStart[0] = 0xcd;
2743 pchMessageStart[1] = 0xf2;
2744 pchMessageStart[2] = 0xc0;
2745 pchMessageStart[3] = 0xef;
2747 bnProofOfWorkLimit = bnProofOfWorkLimitTestNet; // 16 bits PoW target limit for testnet
2748 nStakeMinAge = 2 * nOneHour; // test net min age is 2 hours
2749 nModifierInterval = 20 * 60; // test modifier interval is 20 minutes
2750 nCoinbaseMaturity = 10; // test maturity is 10 blocks
2751 nStakeTargetSpacing = 5 * 60; // test block spacing is 5 minutes
2758 if (!txdb.LoadBlockIndex())
2762 // Init with genesis block
2764 if (mapBlockIndex.empty())
2773 //CBlock(hash=00000a060336cbb72fe969666d337b87198b1add2abaa59cca226820b32933a4, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b, nTime=1360105017, nBits=1e0fffff, nNonce=1575379, vtx=1, vchBlockSig=)
2774 // Coinbase(hash=4cb33b3b6a, nTime=1360105017, ver=1, vin.size=1, vout.size=1, nLockTime=0)
2775 // CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936)
2777 // vMerkleTree: 4cb33b3b6a
2781 //CBlock(hash=0000c763e402f2436da9ed36c7286f62c3f6e5dbafce9ff289bd43d7459327eb, ver=1, hashPrevBlock=0000000000000000000000000000000000000000000000000000000000000000, hashMerkleRoot=4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b, nTime=1360105017, nBits=1f00ffff, nNonce=46534, vtx=1, vchBlockSig=)
2782 // Coinbase(hash=4cb33b3b6a, nTime=1360105017, ver=1, vin.size=1, vout.size=1, nLockTime=0)
2783 // CTxIn(COutPoint(0000000000, 4294967295), coinbase 04ffff001d020f274468747470733a2f2f626974636f696e74616c6b2e6f72672f696e6465782e7068703f746f7069633d3133343137392e6d736731353032313936236d736731353032313936)
2785 // vMerkleTree: 4cb33b3b6a
2787 const char* pszTimestamp = "https://bitcointalk.org/index.php?topic=134179.msg1502196#msg1502196";
2789 txNew.nTime = 1360105017;
2790 txNew.vin.resize(1);
2791 txNew.vout.resize(1);
2792 txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(9999) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
2793 txNew.vout[0].SetEmpty();
2795 block.vtx.push_back(txNew);
2796 block.hashPrevBlock = 0;
2797 block.hashMerkleRoot = block.BuildMerkleTree();
2799 block.nTime = 1360105017;
2800 block.nBits = bnProofOfWorkLimit.GetCompact();
2801 block.nNonce = !fTestNet ? 1575379 : 46534;
2804 assert(block.hashMerkleRoot == uint256("0x4cb33b3b6a861dcbc685d3e614a9cafb945738d6833f182855679f2fad02057b"));
2806 assert(block.GetHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet));
2807 assert(block.CheckBlock());
2809 // Start new block file
2811 unsigned int nBlockPos;
2812 if (!block.WriteToDisk(nFile, nBlockPos))
2813 return error("LoadBlockIndex() : writing genesis block to disk failed");
2814 if (!block.AddToBlockIndex(nFile, nBlockPos))
2815 return error("LoadBlockIndex() : genesis block not accepted");
2817 // initialize synchronized checkpoint
2818 if (!Checkpoints::WriteSyncCheckpoint((!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)))
2819 return error("LoadBlockIndex() : failed to init sync checkpoint");
2821 // upgrade time set to zero if txdb initialized
2823 if (!txdb.WriteModifierUpgradeTime(0))
2824 return error("LoadBlockIndex() : failed to init upgrade info");
2825 printf(" Upgrade Info: ModifierUpgradeTime txdb initialization\n");
2831 string strPubKey = "";
2832 if (!txdb.ReadCheckpointPubKey(strPubKey) || strPubKey != CSyncCheckpoint::strMasterPubKey)
2834 // write checkpoint master key to db
2836 if (!txdb.WriteCheckpointPubKey(CSyncCheckpoint::strMasterPubKey))
2837 return error("LoadBlockIndex() : failed to write new checkpoint master key to db");
2838 if (!txdb.TxnCommit())
2839 return error("LoadBlockIndex() : failed to commit new checkpoint master key to db");
2840 if ((!fTestNet) && !Checkpoints::ResetSyncCheckpoint())
2841 return error("LoadBlockIndex() : failed to reset sync-checkpoint");
2844 // upgrade time set to zero if blocktreedb initialized
2845 if (txdb.ReadModifierUpgradeTime(nModifierUpgradeTime))
2847 if (nModifierUpgradeTime)
2848 printf(" Upgrade Info: blocktreedb upgrade detected at timestamp %d\n", nModifierUpgradeTime);
2850 printf(" Upgrade Info: no blocktreedb upgrade detected.\n");
2854 nModifierUpgradeTime = GetTime();
2855 printf(" Upgrade Info: upgrading blocktreedb at timestamp %u\n", nModifierUpgradeTime);
2856 if (!txdb.WriteModifierUpgradeTime(nModifierUpgradeTime))
2857 return error("LoadBlockIndex() : failed to write upgrade info");
2870 void PrintBlockTree()
2872 // pre-compute tree structure
2873 map<CBlockIndex*, vector<CBlockIndex*> > mapNext;
2874 for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
2876 CBlockIndex* pindex = (*mi).second;
2877 mapNext[pindex->pprev].push_back(pindex);
2879 //while (rand() % 3 == 0)
2880 // mapNext[pindex->pprev].push_back(pindex);
2883 vector<pair<int, CBlockIndex*> > vStack;
2884 vStack.push_back(make_pair(0, pindexGenesisBlock));
2887 while (!vStack.empty())
2889 int nCol = vStack.back().first;
2890 CBlockIndex* pindex = vStack.back().second;
2893 // print split or gap
2894 if (nCol > nPrevCol)
2896 for (int i = 0; i < nCol-1; i++)
2900 else if (nCol < nPrevCol)
2902 for (int i = 0; i < nCol; i++)
2909 for (int i = 0; i < nCol; i++)
2914 block.ReadFromDisk(pindex);
2915 printf("%d (%u,%u) %s %08x %s mint %7s tx %" PRIszu "",
2919 block.GetHash().ToString().c_str(),
2921 DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
2922 FormatMoney(pindex->nMint).c_str(),
2925 PrintWallets(block);
2927 // put the main time-chain first
2928 vector<CBlockIndex*>& vNext = mapNext[pindex];
2929 for (unsigned int i = 0; i < vNext.size(); i++)
2931 if (vNext[i]->pnext)
2933 swap(vNext[0], vNext[i]);
2939 for (unsigned int i = 0; i < vNext.size(); i++)
2940 vStack.push_back(make_pair(nCol+i, vNext[i]));
2944 bool LoadExternalBlockFile(FILE* fileIn)
2946 int64_t nStart = GetTimeMillis();
2952 CAutoFile blkdat(fileIn, SER_DISK, CLIENT_VERSION);
2953 unsigned int nPos = 0;
2954 while (nPos != std::numeric_limits<uint32_t>::max() && blkdat.good() && !fRequestShutdown)
2956 unsigned char pchData[65536];
2958 fseek(blkdat, nPos, SEEK_SET);
2959 int nRead = fread(pchData, 1, sizeof(pchData), blkdat);
2962 nPos = std::numeric_limits<uint32_t>::max();
2965 void* nFind = memchr(pchData, pchMessageStart[0], nRead+1-sizeof(pchMessageStart));
2968 if (memcmp(nFind, pchMessageStart, sizeof(pchMessageStart))==0)
2970 nPos += ((unsigned char*)nFind - pchData) + sizeof(pchMessageStart);
2973 nPos += ((unsigned char*)nFind - pchData) + 1;
2976 nPos += sizeof(pchData) - sizeof(pchMessageStart) + 1;
2977 } while(!fRequestShutdown);
2978 if (nPos == std::numeric_limits<uint32_t>::max())
2980 fseek(blkdat, nPos, SEEK_SET);
2983 if (nSize > 0 && nSize <= MAX_BLOCK_SIZE)
2987 if (ProcessBlock(NULL,&block))
2995 catch (const std::exception&) {
2996 printf("%s() : Deserialize or I/O error caught during load\n",
2997 BOOST_CURRENT_FUNCTION);
3000 printf("Loaded %i blocks from external file in %" PRId64 "ms\n", nLoaded, GetTimeMillis() - nStart);
3004 //////////////////////////////////////////////////////////////////////////////
3009 extern map<uint256, CAlert> mapAlerts;
3010 extern CCriticalSection cs_mapAlerts;
3012 string GetWarnings(string strFor)
3015 string strStatusBar;
3018 if (GetBoolArg("-testsafemode"))
3021 // Misc warnings like out of disk space and clock is wrong
3022 if (strMiscWarning != "")
3025 strStatusBar = strMiscWarning;
3028 // if detected unmet upgrade requirement enter safe mode
3029 // Note: Modifier upgrade requires blockchain redownload if past protocol switch
3030 if (IsFixedModifierInterval(nModifierUpgradeTime + nOneDay)) // 1 day margin
3033 strStatusBar = strRPC = "WARNING: Blockchain redownload required approaching or past v.0.4.4.6u4 upgrade deadline.";
3036 // if detected invalid checkpoint enter safe mode
3037 if (Checkpoints::hashInvalidCheckpoint != 0)
3040 strStatusBar = strRPC = _("WARNING: Invalid checkpoint found! Displayed transactions may not be correct! You may need to upgrade, or notify developers.");
3046 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
3048 const CAlert& alert = item.second;
3049 if (alert.AppliesToMe() && alert.nPriority > nPriority)
3051 nPriority = alert.nPriority;
3052 strStatusBar = alert.strStatusBar;
3053 if (nPriority > 1000)
3054 strRPC = strStatusBar;
3059 if (strFor == "statusbar")
3060 return strStatusBar;
3061 else if (strFor == "rpc")
3063 assert(!"GetWarnings() : invalid parameter");
3074 //////////////////////////////////////////////////////////////////////////////
3080 bool static AlreadyHave(CTxDB& txdb, const CInv& inv)
3086 bool txInMap = false;
3089 txInMap = (mempool.exists(inv.hash));
3092 mapOrphanTransactions.count(inv.hash) ||
3093 txdb.ContainsTx(inv.hash);
3097 return mapBlockIndex.count(inv.hash) ||
3098 mapOrphanBlocks.count(inv.hash);
3100 // Don't know what it is, just say we already got one
3107 // The message start string is designed to be unlikely to occur in normal data.
3108 // The characters are rarely used upper ASCII, not valid as UTF-8, and produce
3109 // a large 4-byte int at any alignment.
3110 unsigned char pchMessageStart[4] = { 0xe4, 0xe8, 0xe9, 0xe5 };
3112 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
3114 static map<CService, CPubKey> mapReuseKey;
3115 RandAddSeedPerfmon();
3117 printf("received: %s (%" PRIszu " bytes)\n", strCommand.c_str(), vRecv.size());
3118 if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
3120 printf("dropmessagestest DROPPING RECV MESSAGE\n");
3124 if (strCommand == "version")
3126 // Each connection can only send one version message
3127 if (pfrom->nVersion != 0)
3129 pfrom->Misbehaving(1);
3136 uint64_t nNonce = 1;
3137 vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
3138 if (pfrom->nVersion < MIN_PROTO_VERSION)
3140 // Since February 20, 2012, the protocol is initiated at version 209,
3141 // and earlier versions are no longer supported
3142 printf("partner %s using obsolete version %i; disconnecting\n", pfrom->addr.ToString().c_str(), pfrom->nVersion);
3143 pfrom->fDisconnect = true;
3147 if (pfrom->nVersion == 10300)
3148 pfrom->nVersion = 300;
3150 vRecv >> addrFrom >> nNonce;
3152 vRecv >> pfrom->strSubVer;
3154 vRecv >> pfrom->nStartingHeight;
3156 if (pfrom->fInbound && addrMe.IsRoutable())
3158 pfrom->addrLocal = addrMe;
3162 // Disconnect if we connected to ourself
3163 if (nNonce == nLocalHostNonce && nNonce > 1)
3165 printf("connected to self at %s, disconnecting\n", pfrom->addr.ToString().c_str());
3166 pfrom->fDisconnect = true;
3170 if (pfrom->nVersion < 60010)
3172 printf("partner %s using a buggy client %d, disconnecting\n", pfrom->addr.ToString().c_str(), pfrom->nVersion);
3173 pfrom->fDisconnect = true;
3177 // record my external IP reported by peer
3178 if (addrFrom.IsRoutable() && addrMe.IsRoutable())
3179 addrSeenByPeer = addrMe;
3181 // Be shy and don't send version until we hear
3182 if (pfrom->fInbound)
3183 pfrom->PushVersion();
3185 pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
3187 AddTimeData(pfrom->addr, nTime);
3190 pfrom->PushMessage("verack");
3191 pfrom->vSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
3193 if (!pfrom->fInbound)
3195 // Advertise our address
3196 if (!fNoListen && !IsInitialBlockDownload())
3198 CAddress addr = GetLocalAddress(&pfrom->addr);
3199 if (addr.IsRoutable())
3200 pfrom->PushAddress(addr);
3203 // Get recent addresses
3204 if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000)
3206 pfrom->PushMessage("getaddr");
3207 pfrom->fGetAddr = true;
3209 addrman.Good(pfrom->addr);
3211 if (((CNetAddr)pfrom->addr) == (CNetAddr)addrFrom)
3213 addrman.Add(addrFrom, addrFrom);
3214 addrman.Good(addrFrom);
3218 // Ask the first connected node for block updates
3219 static int nAskedForBlocks = 0;
3220 if (!pfrom->fClient && !pfrom->fOneShot &&
3221 (pfrom->nStartingHeight > (nBestHeight - 144)) &&
3222 (pfrom->nVersion < NOBLKS_VERSION_START ||
3223 pfrom->nVersion >= NOBLKS_VERSION_END) &&
3224 (nAskedForBlocks < 1 || vNodes.size() <= 1))
3227 pfrom->PushGetBlocks(pindexBest, uint256(0));
3233 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
3234 item.second.RelayTo(pfrom);
3237 // Relay sync-checkpoint
3239 LOCK(Checkpoints::cs_hashSyncCheckpoint);
3240 if (!Checkpoints::checkpointMessage.IsNull())
3241 Checkpoints::checkpointMessage.RelayTo(pfrom);
3244 pfrom->fSuccessfullyConnected = true;
3246 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());
3248 cPeerBlockCounts.input(pfrom->nStartingHeight);
3250 // ppcoin: ask for pending sync-checkpoint if any
3251 if (!IsInitialBlockDownload())
3252 Checkpoints::AskForPendingSyncCheckpoint(pfrom);
3256 else if (pfrom->nVersion == 0)
3258 // Must have a version message before anything else
3259 pfrom->Misbehaving(1);
3264 else if (strCommand == "verack")
3266 pfrom->vRecv.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
3270 else if (strCommand == "addr")
3272 vector<CAddress> vAddr;
3275 // Don't want addr from older versions unless seeding
3276 if (pfrom->nVersion < CADDR_TIME_VERSION && addrman.size() > 1000)
3278 if (vAddr.size() > 1000)
3280 pfrom->Misbehaving(20);
3281 return error("message addr size() = %" PRIszu "", vAddr.size());
3284 // Store the new addresses
3285 vector<CAddress> vAddrOk;
3286 int64_t nNow = GetAdjustedTime();
3287 int64_t nSince = nNow - 10 * 60;
3288 BOOST_FOREACH(CAddress& addr, vAddr)
3292 if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
3293 addr.nTime = nNow - 5 * nOneDay;
3294 pfrom->AddAddressKnown(addr);
3295 bool fReachable = IsReachable(addr);
3296 if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
3298 // Relay to a limited number of other nodes
3301 // Use deterministic randomness to send to the same nodes for 24 hours
3302 // at a time so the setAddrKnowns of the chosen nodes prevent repeats
3303 static uint256 hashSalt;
3305 hashSalt = GetRandHash();
3306 uint64_t hashAddr = addr.GetHash();
3307 uint256 hashRand = hashSalt ^ (hashAddr<<32) ^ ((GetTime()+hashAddr)/nOneDay);
3308 hashRand = Hash(BEGIN(hashRand), END(hashRand));
3309 multimap<uint256, CNode*> mapMix;
3310 BOOST_FOREACH(CNode* pnode, vNodes)
3312 if (pnode->nVersion < CADDR_TIME_VERSION)
3314 unsigned int nPointer;
3315 memcpy(&nPointer, &pnode, sizeof(nPointer));
3316 uint256 hashKey = hashRand ^ nPointer;
3317 hashKey = Hash(BEGIN(hashKey), END(hashKey));
3318 mapMix.insert(make_pair(hashKey, pnode));
3320 int nRelayNodes = fReachable ? 2 : 1; // limited relaying of addresses outside our network(s)
3321 for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
3322 ((*mi).second)->PushAddress(addr);
3325 // Do not store addresses outside our network
3327 vAddrOk.push_back(addr);
3329 addrman.Add(vAddrOk, pfrom->addr, 2 * nOneHour);
3330 if (vAddr.size() < 1000)
3331 pfrom->fGetAddr = false;
3332 if (pfrom->fOneShot)
3333 pfrom->fDisconnect = true;
3336 else if (strCommand == "inv")
3340 if (vInv.size() > MAX_INV_SZ)
3342 pfrom->Misbehaving(20);
3343 return error("message inv size() = %" PRIszu "", vInv.size());
3346 // find last block in inv vector
3347 unsigned int nLastBlock = std::numeric_limits<uint32_t>::max();
3348 for (unsigned int nInv = 0; nInv < vInv.size(); nInv++) {
3349 if (vInv[vInv.size() - 1 - nInv].type == MSG_BLOCK) {
3350 nLastBlock = vInv.size() - 1 - nInv;
3355 for (unsigned int nInv = 0; nInv < vInv.size(); nInv++)
3357 const CInv &inv = vInv[nInv];
3361 pfrom->AddInventoryKnown(inv);
3363 bool fAlreadyHave = AlreadyHave(txdb, inv);
3365 printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
3369 else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash)) {
3370 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
3371 } else if (nInv == nLastBlock) {
3372 // In case we are on a very long side-chain, it is possible that we already have
3373 // the last block in an inv bundle sent in response to getblocks. Try to detect
3374 // this situation and push another getblocks to continue.
3375 pfrom->PushGetBlocks(mapBlockIndex[inv.hash], uint256(0));
3377 printf("force request: %s\n", inv.ToString().c_str());
3380 // Track requests for our stuff
3381 Inventory(inv.hash);
3386 else if (strCommand == "getdata")
3390 if (vInv.size() > MAX_INV_SZ)
3392 pfrom->Misbehaving(20);
3393 return error("message getdata size() = %" PRIszu "", vInv.size());
3396 if (fDebugNet || (vInv.size() != 1))
3397 printf("received getdata (%" PRIszu " invsz)\n", vInv.size());
3399 BOOST_FOREACH(const CInv& inv, vInv)
3403 if (fDebugNet || (vInv.size() == 1))
3404 printf("received getdata for: %s\n", inv.ToString().c_str());
3406 if (inv.type == MSG_BLOCK)
3408 // Send block from disk
3409 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(inv.hash);
3410 if (mi != mapBlockIndex.end())
3413 block.ReadFromDisk((*mi).second);
3414 pfrom->PushMessage("block", block);
3416 // Trigger them to send a getblocks request for the next batch of inventory
3417 if (inv.hash == pfrom->hashContinue)
3419 // ppcoin: send latest proof-of-work block to allow the
3420 // download node to accept as orphan (proof-of-stake
3421 // block might be rejected by stake connection check)
3423 vInv.push_back(CInv(MSG_BLOCK, GetLastBlockIndex(pindexBest, false)->GetBlockHash()));
3424 pfrom->PushMessage("inv", vInv);
3425 pfrom->hashContinue = 0;
3429 else if (inv.IsKnownType())
3431 // Send stream from relay memory
3432 bool pushed = false;
3435 map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
3436 if (mi != mapRelay.end()) {
3437 pfrom->PushMessage(inv.GetCommand(), (*mi).second);
3441 if (!pushed && inv.type == MSG_TX) {
3443 if (mempool.exists(inv.hash)) {
3444 CTransaction tx = mempool.lookup(inv.hash);
3445 CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
3448 pfrom->PushMessage("tx", ss);
3453 // Track requests for our stuff
3454 Inventory(inv.hash);
3459 else if (strCommand == "getblocks")
3461 CBlockLocator locator;
3463 vRecv >> locator >> hashStop;
3465 // Find the last block the caller has in the main chain
3466 CBlockIndex* pindex = locator.GetBlockIndex();
3468 // Send the rest of the chain
3470 pindex = pindex->pnext;
3472 printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
3473 for (; pindex; pindex = pindex->pnext)
3475 if (pindex->GetBlockHash() == hashStop)
3477 printf(" getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str());
3478 // ppcoin: tell downloading node about the latest block if it's
3479 // without risk being rejected due to stake connection check
3480 if (hashStop != hashBestChain && pindex->GetBlockTime() + nStakeMinAge > pindexBest->GetBlockTime())
3481 pfrom->PushInventory(CInv(MSG_BLOCK, hashBestChain));
3484 pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
3487 // When this block is requested, we'll send an inv that'll make them
3488 // getblocks the next batch of inventory.
3489 printf(" getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str());
3490 pfrom->hashContinue = pindex->GetBlockHash();
3495 else if (strCommand == "checkpoint")
3497 CSyncCheckpoint checkpoint;
3498 vRecv >> checkpoint;
3500 if (checkpoint.ProcessSyncCheckpoint(pfrom))
3503 pfrom->hashCheckpointKnown = checkpoint.hashCheckpoint;
3505 BOOST_FOREACH(CNode* pnode, vNodes)
3506 checkpoint.RelayTo(pnode);
3510 else if (strCommand == "getheaders")
3512 CBlockLocator locator;
3514 vRecv >> locator >> hashStop;
3516 CBlockIndex* pindex = NULL;
3517 if (locator.IsNull())
3519 // If locator is null, return the hashStop block
3520 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashStop);
3521 if (mi == mapBlockIndex.end())
3523 pindex = (*mi).second;
3527 // Find the last block the caller has in the main chain
3528 pindex = locator.GetBlockIndex();
3530 pindex = pindex->pnext;
3533 vector<CBlock> vHeaders;
3535 printf("getheaders %d to %s\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str());
3536 for (; pindex; pindex = pindex->pnext)
3538 vHeaders.push_back(pindex->GetBlockHeader());
3539 if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
3542 pfrom->PushMessage("headers", vHeaders);
3546 else if (strCommand == "tx")
3548 vector<uint256> vWorkQueue;
3549 vector<uint256> vEraseQueue;
3550 CDataStream vMsg(vRecv);
3555 CInv inv(MSG_TX, tx.GetHash());
3556 pfrom->AddInventoryKnown(inv);
3558 bool fMissingInputs = false;
3559 if (tx.AcceptToMemoryPool(txdb, true, &fMissingInputs))
3561 SyncWithWallets(tx, NULL, true);
3562 RelayTransaction(tx, inv.hash);
3563 mapAlreadyAskedFor.erase(inv);
3564 vWorkQueue.push_back(inv.hash);
3565 vEraseQueue.push_back(inv.hash);
3567 // Recursively process any orphan transactions that depended on this one
3568 for (unsigned int i = 0; i < vWorkQueue.size(); i++)
3570 uint256 hashPrev = vWorkQueue[i];
3571 for (set<uint256>::iterator mi = mapOrphanTransactionsByPrev[hashPrev].begin();
3572 mi != mapOrphanTransactionsByPrev[hashPrev].end();
3575 const uint256& orphanTxHash = *mi;
3576 CTransaction& orphanTx = mapOrphanTransactions[orphanTxHash];
3577 bool fMissingInputs2 = false;
3579 if (orphanTx.AcceptToMemoryPool(txdb, true, &fMissingInputs2))
3581 printf(" accepted orphan tx %s\n", orphanTxHash.ToString().substr(0,10).c_str());
3582 SyncWithWallets(tx, NULL, true);
3583 RelayTransaction(orphanTx, orphanTxHash);
3584 mapAlreadyAskedFor.erase(CInv(MSG_TX, orphanTxHash));
3585 vWorkQueue.push_back(orphanTxHash);
3586 vEraseQueue.push_back(orphanTxHash);
3588 else if (!fMissingInputs2)
3591 vEraseQueue.push_back(orphanTxHash);
3592 printf(" removed invalid orphan tx %s\n", orphanTxHash.ToString().substr(0,10).c_str());
3597 BOOST_FOREACH(uint256 hash, vEraseQueue)
3598 EraseOrphanTx(hash);
3600 else if (fMissingInputs)
3604 // DoS prevention: do not allow mapOrphanTransactions to grow unbounded
3605 unsigned int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
3607 printf("mapOrphan overflow, removed %u tx\n", nEvicted);
3609 if (tx.nDoS) pfrom->Misbehaving(tx.nDoS);
3613 else if (strCommand == "block")
3617 uint256 hashBlock = block.GetHash();
3619 printf("received block %s\n", hashBlock.ToString().substr(0,20).c_str());
3622 CInv inv(MSG_BLOCK, hashBlock);
3623 pfrom->AddInventoryKnown(inv);
3625 if (ProcessBlock(pfrom, &block))
3626 mapAlreadyAskedFor.erase(inv);
3627 if (block.nDoS) pfrom->Misbehaving(block.nDoS);
3631 // This asymmetric behavior for inbound and outbound connections was introduced
3632 // to prevent a fingerprinting attack: an attacker can send specific fake addresses
3633 // to users' AddrMan and later request them by sending getaddr messages.
3634 // Making users (which are behind NAT and can only make outgoing connections) ignore
3635 // getaddr message mitigates the attack.
3636 else if ((strCommand == "getaddr") && (pfrom->fInbound))
3638 // Don't return addresses older than nCutOff timestamp
3639 int64_t nCutOff = GetTime() - (nNodeLifespan * nOneDay);
3640 pfrom->vAddrToSend.clear();
3641 vector<CAddress> vAddr = addrman.GetAddr();
3642 BOOST_FOREACH(const CAddress &addr, vAddr)
3643 if(addr.nTime > nCutOff)
3644 pfrom->PushAddress(addr);
3648 else if (strCommand == "mempool")
3650 std::vector<uint256> vtxid;
3651 mempool.queryHashes(vtxid);
3653 for (unsigned int i = 0; i < vtxid.size(); i++) {
3654 CInv inv(MSG_TX, vtxid[i]);
3655 vInv.push_back(inv);
3656 if (i == (MAX_INV_SZ - 1))
3659 if (vInv.size() > 0)
3660 pfrom->PushMessage("inv", vInv);
3664 else if (strCommand == "checkorder")
3669 if (!GetBoolArg("-allowreceivebyip"))
3671 pfrom->PushMessage("reply", hashReply, (int)2, string(""));
3678 /// we have a chance to check the order here
3680 // Keep giving the same key to the same ip until they use it
3681 if (!mapReuseKey.count(pfrom->addr))
3682 pwalletMain->GetKeyFromPool(mapReuseKey[pfrom->addr], true);
3684 // Send back approval of order and pubkey to use
3685 CScript scriptPubKey;
3686 scriptPubKey << mapReuseKey[pfrom->addr] << OP_CHECKSIG;
3687 pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
3691 else if (strCommand == "reply")
3696 CRequestTracker tracker;
3698 LOCK(pfrom->cs_mapRequests);
3699 map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
3700 if (mi != pfrom->mapRequests.end())
3702 tracker = (*mi).second;
3703 pfrom->mapRequests.erase(mi);
3706 if (!tracker.IsNull())
3707 tracker.fn(tracker.param1, vRecv);
3711 else if (strCommand == "ping")
3713 if (pfrom->nVersion > BIP0031_VERSION)
3717 // Echo the message back with the nonce. This allows for two useful features:
3719 // 1) A remote node can quickly check if the connection is operational
3720 // 2) Remote nodes can measure the latency of the network thread. If this node
3721 // is overloaded it won't respond to pings quickly and the remote node can
3722 // avoid sending us more work, like chain download requests.
3724 // The nonce stops the remote getting confused between different pings: without
3725 // it, if the remote node sends a ping once per second and this node takes 5
3726 // seconds to respond to each, the 5th ping the remote sends would appear to
3727 // return very quickly.
3728 pfrom->PushMessage("pong", nonce);
3733 else if (strCommand == "alert")
3738 uint256 alertHash = alert.GetHash();
3739 if (pfrom->setKnown.count(alertHash) == 0)
3741 if (alert.ProcessAlert())
3744 pfrom->setKnown.insert(alertHash);
3747 BOOST_FOREACH(CNode* pnode, vNodes)
3748 alert.RelayTo(pnode);
3752 // Small DoS penalty so peers that send us lots of
3753 // duplicate/expired/invalid-signature/whatever alerts
3754 // eventually get banned.
3755 // This isn't a Misbehaving(100) (immediate ban) because the
3756 // peer might be an older or different implementation with
3757 // a different signature key, etc.
3758 pfrom->Misbehaving(10);
3766 // Ignore unknown commands for extensibility
3770 // Update the last seen time for this node's address
3771 if (pfrom->fNetworkNode)
3772 if (strCommand == "version" || strCommand == "addr" || strCommand == "inv" || strCommand == "getdata" || strCommand == "ping")
3773 AddressCurrentlyConnected(pfrom->addr);
3779 bool ProcessMessages(CNode* pfrom)
3781 CDataStream& vRecv = pfrom->vRecv;
3785 // printf("ProcessMessages(%u bytes)\n", vRecv.size());
3789 // (4) message start
3798 // Don't bother if send buffer is too full to respond anyway
3799 if (pfrom->vSend.size() >= SendBufferSize())
3802 // Scan for message start
3803 CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
3804 int nHeaderSize = vRecv.GetSerializeSize(CMessageHeader());
3805 if (vRecv.end() - pstart < nHeaderSize)
3807 if ((int)vRecv.size() > nHeaderSize)
3809 printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
3810 vRecv.erase(vRecv.begin(), vRecv.end() - nHeaderSize);
3814 if (pstart - vRecv.begin() > 0)
3815 printf("\n\nPROCESSMESSAGE SKIPPED %" PRIpdd " BYTES\n\n", pstart - vRecv.begin());
3816 vRecv.erase(vRecv.begin(), pstart);
3819 vector<char> vHeaderSave(vRecv.begin(), vRecv.begin() + nHeaderSize);
3824 printf("\n\nPROCESSMESSAGE: ERRORS IN HEADER %s\n\n\n", hdr.GetCommand().c_str());
3827 string strCommand = hdr.GetCommand();
3830 unsigned int nMessageSize = hdr.nMessageSize;
3831 if (nMessageSize > MAX_SIZE)
3833 printf("ProcessMessages(%s, %u bytes) : nMessageSize > MAX_SIZE\n", strCommand.c_str(), nMessageSize);
3836 if (nMessageSize > vRecv.size())
3838 // Rewind and wait for rest of message
3839 vRecv.insert(vRecv.begin(), vHeaderSave.begin(), vHeaderSave.end());
3844 uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
3845 unsigned int nChecksum = 0;
3846 memcpy(&nChecksum, &hash, sizeof(nChecksum));
3847 if (nChecksum != hdr.nChecksum)
3849 printf("ProcessMessages(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
3850 strCommand.c_str(), nMessageSize, nChecksum, hdr.nChecksum);
3854 // Copy message to its own buffer
3855 CDataStream vMsg(vRecv.begin(), vRecv.begin() + nMessageSize, vRecv.nType, vRecv.nVersion);
3856 vRecv.ignore(nMessageSize);
3864 fRet = ProcessMessage(pfrom, strCommand, vMsg);
3869 catch (std::ios_base::failure& e)
3871 if (strstr(e.what(), "end of data"))
3873 // Allow exceptions from under-length message on vRecv
3874 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());
3876 else if (strstr(e.what(), "size too large"))
3878 // Allow exceptions from over-long size
3879 printf("ProcessMessages(%s, %u bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
3883 PrintExceptionContinue(&e, "ProcessMessages()");
3886 catch (std::exception& e) {
3887 PrintExceptionContinue(&e, "ProcessMessages()");
3889 PrintExceptionContinue(NULL, "ProcessMessages()");
3893 printf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand.c_str(), nMessageSize);
3901 bool SendMessages(CNode* pto, bool fSendTrickle)
3903 TRY_LOCK(cs_main, lockMain);
3905 // Don't send anything until we get their version message
3906 if (pto->nVersion == 0)
3909 // Keep-alive ping. We send a nonce of zero because we don't use it anywhere
3911 if (pto->nLastSend && GetTime() - pto->nLastSend > nPingInterval && pto->vSend.empty()) {
3913 if (pto->nVersion > BIP0031_VERSION)
3914 pto->PushMessage("ping", nonce);
3916 pto->PushMessage("ping");
3920 if (pto->fStartSync) {
3921 pto->fStartSync = false;
3922 pto->PushGetBlocks(pindexBest, uint256(0));
3925 // Resend wallet transactions that haven't gotten in a block yet
3926 ResendWalletTransactions();
3928 // Address refresh broadcast
3929 static int64_t nLastRebroadcast;
3930 if (!IsInitialBlockDownload() && (GetTime() - nLastRebroadcast > nBroadcastInterval))
3934 BOOST_FOREACH(CNode* pnode, vNodes)
3936 // Periodically clear setAddrKnown to allow refresh broadcasts
3937 if (nLastRebroadcast)
3938 pnode->setAddrKnown.clear();
3940 // Rebroadcast our address
3943 CAddress addr = GetLocalAddress(&pnode->addr);
3944 if (addr.IsRoutable())
3945 pnode->PushAddress(addr);
3949 nLastRebroadcast = GetTime();
3957 vector<CAddress> vAddr;
3958 vAddr.reserve(pto->vAddrToSend.size());
3959 BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
3961 // returns true if wasn't already contained in the set
3962 if (pto->setAddrKnown.insert(addr).second)
3964 vAddr.push_back(addr);
3965 // receiver rejects addr messages larger than 1000
3966 if (vAddr.size() >= 1000)
3968 pto->PushMessage("addr", vAddr);
3973 pto->vAddrToSend.clear();
3975 pto->PushMessage("addr", vAddr);
3980 // Message: inventory
3983 vector<CInv> vInvWait;
3985 LOCK(pto->cs_inventory);
3986 vInv.reserve(pto->vInventoryToSend.size());
3987 vInvWait.reserve(pto->vInventoryToSend.size());
3988 BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
3990 if (pto->setInventoryKnown.count(inv))
3993 // trickle out tx inv to protect privacy
3994 if (inv.type == MSG_TX && !fSendTrickle)
3996 // 1/4 of tx invs blast to all immediately
3997 static uint256 hashSalt;
3999 hashSalt = GetRandHash();
4000 uint256 hashRand = inv.hash ^ hashSalt;
4001 hashRand = Hash(BEGIN(hashRand), END(hashRand));
4002 bool fTrickleWait = ((hashRand & 3) != 0);
4004 // always trickle our own transactions
4008 if (GetTransaction(inv.hash, wtx))
4010 fTrickleWait = true;
4015 vInvWait.push_back(inv);
4020 // returns true if wasn't already contained in the set
4021 if (pto->setInventoryKnown.insert(inv).second)
4023 vInv.push_back(inv);
4024 if (vInv.size() >= 1000)
4026 pto->PushMessage("inv", vInv);
4031 pto->vInventoryToSend = vInvWait;
4034 pto->PushMessage("inv", vInv);
4040 vector<CInv> vGetData;
4041 int64_t nNow = GetTime() * 1000000;
4043 while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
4045 const CInv& inv = (*pto->mapAskFor.begin()).second;
4046 if (!AlreadyHave(txdb, inv))
4049 printf("sending getdata: %s\n", inv.ToString().c_str());
4050 vGetData.push_back(inv);
4051 if (vGetData.size() >= 1000)
4053 pto->PushMessage("getdata", vGetData);
4056 mapAlreadyAskedFor[inv] = nNow;
4058 pto->mapAskFor.erase(pto->mapAskFor.begin());
4060 if (!vGetData.empty())
4061 pto->PushMessage("getdata", vGetData);
4074 std::map<uint256, CBlockIndex*>::iterator it1 = mapBlockIndex.begin();
4075 for (; it1 != mapBlockIndex.end(); it1++)
4076 delete (*it1).second;
4077 mapBlockIndex.clear();
4080 std::map<uint256, CBlock*>::iterator it2 = mapOrphanBlocks.begin();
4081 for (; it2 != mapOrphanBlocks.end(); it2++)
4082 delete (*it2).second;
4083 mapOrphanBlocks.clear();
4085 // orphan transactions
4087 } instance_of_cmaincleanup;