1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
8 #include "cryptopp/sha.h"
14 //////////////////////////////////////////////////////////////////////////////
19 bool CWallet::AddKey(const CKey& key)
21 if (!CCryptoKeyStore::AddKey(key))
26 return CWalletDB(strWalletFile).WriteKey(key.GetPubKey(), key.GetPrivKey());
30 bool CWallet::AddCryptedKey(const vector<unsigned char> &vchPubKey, const vector<unsigned char> &vchCryptedSecret)
32 if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
36 CRITICAL_BLOCK(cs_wallet)
38 if (pwalletdbEncryption)
39 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
41 return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
46 bool CWallet::Unlock(const string& strWalletPassphrase)
52 CKeyingMaterial vMasterKey;
54 CRITICAL_BLOCK(cs_wallet)
55 BOOST_FOREACH(const MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
57 if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
59 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
61 if (CCryptoKeyStore::Unlock(vMasterKey))
67 bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const string& strNewWalletPassphrase)
69 bool fWasLocked = IsLocked();
71 CRITICAL_BLOCK(cs_wallet)
76 CKeyingMaterial vMasterKey;
77 BOOST_FOREACH(MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
79 if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
81 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
83 if (CCryptoKeyStore::Unlock(vMasterKey))
85 int64 nStartTime = GetTimeMillis();
86 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
87 pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
89 nStartTime = GetTimeMillis();
90 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
91 pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
93 if (pMasterKey.second.nDeriveIterations < 25000)
94 pMasterKey.second.nDeriveIterations = 25000;
96 printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
98 if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
100 if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey))
102 CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
114 // This class implements an addrIncoming entry that causes pre-0.4
115 // clients to crash on startup if reading a private-key-encrypted wallet.
116 class CCorruptAddress
121 if (nType & SER_DISK)
126 bool CWallet::EncryptWallet(const string& strWalletPassphrase)
131 CKeyingMaterial vMasterKey;
132 RandAddSeedPerfmon();
134 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
135 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
137 CMasterKey kMasterKey;
139 RandAddSeedPerfmon();
140 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
141 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
144 int64 nStartTime = GetTimeMillis();
145 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
146 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
148 nStartTime = GetTimeMillis();
149 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
150 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
152 if (kMasterKey.nDeriveIterations < 25000)
153 kMasterKey.nDeriveIterations = 25000;
155 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
157 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
159 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
162 CRITICAL_BLOCK(cs_wallet)
164 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
167 pwalletdbEncryption = new CWalletDB(strWalletFile);
168 pwalletdbEncryption->TxnBegin();
169 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
172 if (!EncryptKeys(vMasterKey))
175 pwalletdbEncryption->TxnAbort();
176 exit(1); //We now probably have half of our keys encrypted in memory, and half not...die and let the user reload their unencrypted wallet.
181 CCorruptAddress corruptAddress;
182 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
183 if (!pwalletdbEncryption->TxnCommit())
184 exit(1); //We now have keys encrypted in memory, but no on disk...die to avoid confusion and let the user reload their unencrypted wallet.
186 pwalletdbEncryption->Close();
187 pwalletdbEncryption = NULL;
191 Unlock(strWalletPassphrase);
195 // Need to completely rewrite the wallet file; if we don't, bdb might keep
196 // bits of the unencrypted private key in slack space in the database file.
197 if (CDB::Rewrite(strWalletFile))
198 RemoveLogFilesOnShutdown(true);
204 void CWallet::WalletUpdateSpent(const CTransaction &tx)
206 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
207 // Update the wallet spent flag if it doesn't know due to wallet.dat being
208 // restored from backup or the user making copies of wallet.dat.
209 CRITICAL_BLOCK(cs_wallet)
211 BOOST_FOREACH(const CTxIn& txin, tx.vin)
213 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
214 if (mi != mapWallet.end())
216 CWalletTx& wtx = (*mi).second;
217 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
219 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
220 wtx.MarkSpent(txin.prevout.n);
222 vWalletUpdated.push_back(txin.prevout.hash);
229 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
231 uint256 hash = wtxIn.GetHash();
232 CRITICAL_BLOCK(cs_wallet)
234 // Inserts only if not already there, returns tx inserted or tx found
235 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
236 CWalletTx& wtx = (*ret.first).second;
238 bool fInsertedNew = ret.second;
240 wtx.nTimeReceived = GetAdjustedTime();
242 bool fUpdated = false;
246 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
248 wtx.hashBlock = wtxIn.hashBlock;
251 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
253 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
254 wtx.nIndex = wtxIn.nIndex;
257 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
259 wtx.fFromMe = wtxIn.fFromMe;
262 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
266 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
269 if (fInsertedNew || fUpdated)
270 if (!wtx.WriteToDisk())
273 // If default receiving address gets used, replace it with a new one
274 CScript scriptDefaultKey;
275 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
276 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
278 if (txout.scriptPubKey == scriptDefaultKey)
280 std::vector<unsigned char> newDefaultKey;
281 if (GetKeyFromPool(newDefaultKey, false))
283 SetDefaultKey(newDefaultKey);
284 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
290 vWalletUpdated.push_back(hash);
292 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
293 WalletUpdateSpent(wtx);
301 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
303 uint256 hash = tx.GetHash();
304 CRITICAL_BLOCK(cs_wallet)
306 bool fExisted = mapWallet.count(hash);
307 if (fExisted && !fUpdate) return false;
308 if (fExisted || IsMine(tx) || IsFromMe(tx))
310 CWalletTx wtx(this,tx);
311 // Get merkle branch if transaction was found in a block
313 wtx.SetMerkleBranch(pblock);
314 return AddToWallet(wtx);
317 WalletUpdateSpent(tx);
322 bool CWallet::EraseFromWallet(uint256 hash)
326 CRITICAL_BLOCK(cs_wallet)
328 if (mapWallet.erase(hash))
329 CWalletDB(strWalletFile).EraseTx(hash);
335 bool CWallet::IsMine(const CTxIn &txin) const
337 CRITICAL_BLOCK(cs_wallet)
339 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
340 if (mi != mapWallet.end())
342 const CWalletTx& prev = (*mi).second;
343 if (txin.prevout.n < prev.vout.size())
344 if (IsMine(prev.vout[txin.prevout.n]))
351 int64 CWallet::GetDebit(const CTxIn &txin) const
353 CRITICAL_BLOCK(cs_wallet)
355 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
356 if (mi != mapWallet.end())
358 const CWalletTx& prev = (*mi).second;
359 if (txin.prevout.n < prev.vout.size())
360 if (IsMine(prev.vout[txin.prevout.n]))
361 return prev.vout[txin.prevout.n].nValue;
367 int64 CWalletTx::GetTxTime() const
369 return nTimeReceived;
372 int CWalletTx::GetRequestCount() const
374 // Returns -1 if it wasn't being tracked
376 CRITICAL_BLOCK(pwallet->cs_wallet)
383 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
384 if (mi != pwallet->mapRequestCount.end())
385 nRequests = (*mi).second;
390 // Did anyone request this transaction?
391 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
392 if (mi != pwallet->mapRequestCount.end())
394 nRequests = (*mi).second;
396 // How about the block it's in?
397 if (nRequests == 0 && hashBlock != 0)
399 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
400 if (mi != pwallet->mapRequestCount.end())
401 nRequests = (*mi).second;
403 nRequests = 1; // If it's in someone else's block it must have got out
411 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
412 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
414 nGeneratedImmature = nGeneratedMature = nFee = 0;
415 listReceived.clear();
417 strSentAccount = strFromAccount;
421 if (GetBlocksToMaturity() > 0)
422 nGeneratedImmature = pwallet->GetCredit(*this);
424 nGeneratedMature = GetCredit();
429 int64 nDebit = GetDebit();
430 if (nDebit > 0) // debit>0 means we signed/sent this transaction
432 int64 nValueOut = GetValueOut();
433 nFee = nDebit - nValueOut;
436 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
437 // but non-standard clients might (so return a list of address/amount pairs)
438 BOOST_FOREACH(const CTxOut& txout, vout)
440 CBitcoinAddress address;
441 vector<unsigned char> vchPubKey;
442 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
444 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
445 this->GetHash().ToString().c_str());
446 address = " unknown ";
449 // Don't report 'change' txouts
450 if (nDebit > 0 && pwallet->IsChange(txout))
454 listSent.push_back(make_pair(address, txout.nValue));
456 if (pwallet->IsMine(txout))
457 listReceived.push_back(make_pair(address, txout.nValue));
462 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
463 int64& nSent, int64& nFee) const
465 nGenerated = nReceived = nSent = nFee = 0;
467 int64 allGeneratedImmature, allGeneratedMature, allFee;
468 allGeneratedImmature = allGeneratedMature = allFee = 0;
469 string strSentAccount;
470 list<pair<CBitcoinAddress, int64> > listReceived;
471 list<pair<CBitcoinAddress, int64> > listSent;
472 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
474 if (strAccount == "")
475 nGenerated = allGeneratedMature;
476 if (strAccount == strSentAccount)
478 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
482 CRITICAL_BLOCK(pwallet->cs_wallet)
484 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
486 if (pwallet->mapAddressBook.count(r.first))
488 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
489 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
490 nReceived += r.second;
492 else if (strAccount.empty())
494 nReceived += r.second;
500 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
504 const int COPY_DEPTH = 3;
505 if (SetMerkleBranch() < COPY_DEPTH)
507 vector<uint256> vWorkQueue;
508 BOOST_FOREACH(const CTxIn& txin, vin)
509 vWorkQueue.push_back(txin.prevout.hash);
511 // This critsect is OK because txdb is already open
512 CRITICAL_BLOCK(pwallet->cs_wallet)
514 map<uint256, const CMerkleTx*> mapWalletPrev;
515 set<uint256> setAlreadyDone;
516 for (int i = 0; i < vWorkQueue.size(); i++)
518 uint256 hash = vWorkQueue[i];
519 if (setAlreadyDone.count(hash))
521 setAlreadyDone.insert(hash);
524 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
525 if (mi != pwallet->mapWallet.end())
528 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
529 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
531 else if (mapWalletPrev.count(hash))
533 tx = *mapWalletPrev[hash];
535 else if (!fClient && txdb.ReadDiskTx(hash, tx))
541 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
545 int nDepth = tx.SetMerkleBranch();
546 vtxPrev.push_back(tx);
548 if (nDepth < COPY_DEPTH)
549 BOOST_FOREACH(const CTxIn& txin, tx.vin)
550 vWorkQueue.push_back(txin.prevout.hash);
555 reverse(vtxPrev.begin(), vtxPrev.end());
558 bool CWalletTx::WriteToDisk()
560 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
563 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
567 CBlockIndex* pindex = pindexStart;
568 CRITICAL_BLOCK(cs_wallet)
573 block.ReadFromDisk(pindex, true);
574 BOOST_FOREACH(CTransaction& tx, block.vtx)
576 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
579 pindex = pindex->pnext;
585 void CWallet::ReacceptWalletTransactions()
589 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
592 vector<CDiskTxPos> vMissingTx;
593 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
595 CWalletTx& wtx = item.second;
596 if (wtx.IsCoinBase() && wtx.IsSpent(0))
600 bool fUpdated = false;
601 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
603 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
604 if (txindex.vSpent.size() != wtx.vout.size())
606 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
609 for (int i = 0; i < txindex.vSpent.size(); i++)
613 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
617 vMissingTx.push_back(txindex.vSpent[i]);
622 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
629 // Reaccept any txes of ours that aren't already in a block
630 if (!wtx.IsCoinBase())
631 wtx.AcceptWalletTransaction(txdb, false);
634 if (!vMissingTx.empty())
636 // TODO: optimize this to scan just part of the block chain?
637 if (ScanForWalletTransactions(pindexGenesisBlock))
638 fRepeat = true; // Found missing transactions: re-do Reaccept.
643 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
645 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
647 if (!tx.IsCoinBase())
649 uint256 hash = tx.GetHash();
650 if (!txdb.ContainsTx(hash))
651 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
656 uint256 hash = GetHash();
657 if (!txdb.ContainsTx(hash))
659 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
660 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
665 void CWalletTx::RelayWalletTransaction()
668 RelayWalletTransaction(txdb);
671 void CWallet::ResendWalletTransactions()
673 // Do this infrequently and randomly to avoid giving away
674 // that these are our transactions.
675 static int64 nNextTime;
676 if (GetTime() < nNextTime)
678 bool fFirst = (nNextTime == 0);
679 nNextTime = GetTime() + GetRand(30 * 60);
683 // Only do it if there's been a new block since last time
684 static int64 nLastTime;
685 if (nTimeBestReceived < nLastTime)
687 nLastTime = GetTime();
689 // Rebroadcast any of our txes that aren't in a block yet
690 printf("ResendWalletTransactions()\n");
692 CRITICAL_BLOCK(cs_wallet)
694 // Sort them in chronological order
695 multimap<unsigned int, CWalletTx*> mapSorted;
696 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
698 CWalletTx& wtx = item.second;
699 // Don't rebroadcast until it's had plenty of time that
700 // it should have gotten in already by now.
701 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
702 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
704 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
706 CWalletTx& wtx = *item.second;
707 wtx.RelayWalletTransaction(txdb);
717 //////////////////////////////////////////////////////////////////////////////
723 int64 CWallet::GetBalance() const
726 CRITICAL_BLOCK(cs_wallet)
728 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
730 const CWalletTx* pcoin = &(*it).second;
731 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
733 nTotal += pcoin->GetAvailableCredit();
741 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
746 // List of values less than target
747 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
748 coinLowestLarger.first = INT64_MAX;
749 coinLowestLarger.second.first = NULL;
750 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
751 int64 nTotalLower = 0;
753 CRITICAL_BLOCK(cs_wallet)
755 vector<const CWalletTx*> vCoins;
756 vCoins.reserve(mapWallet.size());
757 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
758 vCoins.push_back(&(*it).second);
759 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
761 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
763 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
766 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
769 int nDepth = pcoin->GetDepthInMainChain();
770 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
773 for (int i = 0; i < pcoin->vout.size(); i++)
775 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
778 int64 n = pcoin->vout[i].nValue;
783 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
785 if (n == nTargetValue)
787 setCoinsRet.insert(coin.second);
788 nValueRet += coin.first;
791 else if (n < nTargetValue + CENT)
793 vValue.push_back(coin);
796 else if (n < coinLowestLarger.first)
798 coinLowestLarger = coin;
804 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
806 for (int i = 0; i < vValue.size(); ++i)
808 setCoinsRet.insert(vValue[i].second);
809 nValueRet += vValue[i].first;
814 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
816 if (coinLowestLarger.second.first == NULL)
818 setCoinsRet.insert(coinLowestLarger.second);
819 nValueRet += coinLowestLarger.first;
823 if (nTotalLower >= nTargetValue + CENT)
824 nTargetValue += CENT;
826 // Solve subset sum by stochastic approximation
827 sort(vValue.rbegin(), vValue.rend());
828 vector<char> vfIncluded;
829 vector<char> vfBest(vValue.size(), true);
830 int64 nBest = nTotalLower;
832 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
834 vfIncluded.assign(vValue.size(), false);
836 bool fReachedTarget = false;
837 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
839 for (int i = 0; i < vValue.size(); i++)
841 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
843 nTotal += vValue[i].first;
844 vfIncluded[i] = true;
845 if (nTotal >= nTargetValue)
847 fReachedTarget = true;
853 nTotal -= vValue[i].first;
854 vfIncluded[i] = false;
861 // If the next larger is still closer, return it
862 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
864 setCoinsRet.insert(coinLowestLarger.second);
865 nValueRet += coinLowestLarger.first;
868 for (int i = 0; i < vValue.size(); i++)
871 setCoinsRet.insert(vValue[i].second);
872 nValueRet += vValue[i].first;
876 printf("SelectCoins() best subset: ");
877 for (int i = 0; i < vValue.size(); i++)
879 printf("%s ", FormatMoney(vValue[i].first).c_str());
880 printf("total %s\n", FormatMoney(nBest).c_str());
886 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
888 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
889 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
890 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
896 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
899 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
905 if (vecSend.empty() || nValue < 0)
908 wtxNew.pwallet = this;
910 CRITICAL_BLOCK(cs_main)
911 CRITICAL_BLOCK(cs_wallet)
913 // txdb must be opened before the mapWallet lock
916 nFeeRet = nTransactionFee;
921 wtxNew.fFromMe = true;
923 int64 nTotalValue = nValue + nFeeRet;
924 double dPriority = 0;
925 // vouts to the payees
926 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
927 wtxNew.vout.push_back(CTxOut(s.second, s.first));
929 // Choose coins to use
930 set<pair<const CWalletTx*,unsigned int> > setCoins;
932 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
934 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
936 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
937 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
940 int64 nChange = nValueIn - nValue - nFeeRet;
941 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
942 // or until nChange becomes zero
943 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
945 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
946 nChange -= nMoveToFee;
947 nFeeRet += nMoveToFee;
952 // Note: We use a new key here to keep it from being obvious which side is the change.
953 // The drawback is that by not reusing a previous key, the change may be lost if a
954 // backup is restored, if the backup doesn't have the new private key for the change.
955 // If we reused the old key, it would be possible to add code to look for and
956 // rediscover unknown transactions that were written with keys of ours to recover
957 // post-backup change.
959 // Reserve a new key pair from key pool
960 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
961 // assert(mapKeys.count(vchPubKey));
963 // Fill a vout to ourself, using same address type as the payment
964 CScript scriptChange;
965 if (vecSend[0].first.GetBitcoinAddress().IsValid())
966 scriptChange.SetBitcoinAddress(vchPubKey);
968 scriptChange << vchPubKey << OP_CHECKSIG;
970 // Insert change txn at random position:
971 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
972 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
975 reservekey.ReturnKey();
978 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
979 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
983 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
984 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
988 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
989 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
993 // Check that enough fee is included
994 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
995 bool fAllowFree = CTransaction::AllowFree(dPriority);
996 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
997 if (nFeeRet < max(nPayFee, nMinFee))
999 nFeeRet = max(nPayFee, nMinFee);
1003 // Fill vtxPrev by copying from previous transactions vtxPrev
1004 wtxNew.AddSupportingTransactions(txdb);
1005 wtxNew.fTimeReceivedIsTxTime = true;
1014 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1016 vector< pair<CScript, int64> > vecSend;
1017 vecSend.push_back(make_pair(scriptPubKey, nValue));
1018 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1021 // Call after CreateTransaction unless you want to abort
1022 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1024 CRITICAL_BLOCK(cs_main)
1025 CRITICAL_BLOCK(cs_wallet)
1027 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1029 // This is only to keep the database open to defeat the auto-flush for the
1030 // duration of this scope. This is the only place where this optimization
1031 // maybe makes sense; please don't do it anywhere else.
1032 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1034 // Take key pair from key pool so it won't be used again
1035 reservekey.KeepKey();
1037 // Add tx to wallet, because if it has change it's also ours,
1038 // otherwise just for transaction history.
1039 AddToWallet(wtxNew);
1041 // Mark old coins as spent
1042 set<CWalletTx*> setCoins;
1043 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1045 CWalletTx &coin = mapWallet[txin.prevout.hash];
1046 coin.pwallet = this;
1047 coin.MarkSpent(txin.prevout.n);
1049 vWalletUpdated.push_back(coin.GetHash());
1056 // Track how many getdata requests our transaction gets
1057 mapRequestCount[wtxNew.GetHash()] = 0;
1060 if (!wtxNew.AcceptToMemoryPool())
1062 // This must not fail. The transaction has already been signed and recorded.
1063 printf("CommitTransaction() : Error: Transaction not valid");
1066 wtxNew.RelayWalletTransaction();
1075 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1077 CReserveKey reservekey(this);
1082 string strError = _("Error: Wallet locked, unable to create transaction ");
1083 printf("SendMoney() : %s", strError.c_str());
1086 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1089 if (nValue + nFeeRequired > GetBalance())
1090 strError = strprintf(_("Error: This transaction requires a transaction fee of at least %s because of its amount, complexity, or use of recently received funds "), FormatMoney(nFeeRequired).c_str());
1092 strError = _("Error: Transaction creation failed ");
1093 printf("SendMoney() : %s", strError.c_str());
1097 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1100 if (!CommitTransaction(wtxNew, reservekey))
1101 return _("Error: The transaction was rejected. This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here.");
1109 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1113 return _("Invalid amount");
1114 if (nValue + nTransactionFee > GetBalance())
1115 return _("Insufficient funds");
1117 // Parse bitcoin address
1118 CScript scriptPubKey;
1119 scriptPubKey.SetBitcoinAddress(address);
1121 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1127 int CWallet::LoadWallet(bool& fFirstRunRet)
1131 fFirstRunRet = false;
1132 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1133 if (nLoadWalletRet == DB_NEED_REWRITE)
1135 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1137 RemoveLogFilesOnShutdown(true);
1139 // Note: can't top-up keypool here, because wallet is locked.
1140 // User will be prompted to unlock wallet the next operation
1141 // the requires a new key.
1143 nLoadWalletRet = DB_NEED_REWRITE;
1146 if (nLoadWalletRet != DB_LOAD_OK)
1147 return nLoadWalletRet;
1148 fFirstRunRet = vchDefaultKey.empty();
1150 if (!HaveKey(Hash160(vchDefaultKey)))
1152 // Create new keyUser and set as default key
1153 RandAddSeedPerfmon();
1155 std::vector<unsigned char> newDefaultKey;
1156 if (!GetKeyFromPool(newDefaultKey, false))
1157 return DB_LOAD_FAIL;
1158 SetDefaultKey(newDefaultKey);
1159 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1160 return DB_LOAD_FAIL;
1163 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1168 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1170 mapAddressBook[address] = strName;
1173 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1176 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1178 mapAddressBook.erase(address);
1181 return CWalletDB(strWalletFile).EraseName(address.ToString());
1185 void CWallet::PrintWallet(const CBlock& block)
1187 CRITICAL_BLOCK(cs_wallet)
1189 if (mapWallet.count(block.vtx[0].GetHash()))
1191 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1192 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1198 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1200 CRITICAL_BLOCK(cs_wallet)
1202 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1203 if (mi != mapWallet.end())
1212 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1216 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1219 vchDefaultKey = vchPubKey;
1223 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1225 if (!pwallet->fFileBacked)
1227 strWalletFileOut = pwallet->strWalletFile;
1232 // Mark old keypool keys as used,
1233 // and generate all new keys
1235 bool CWallet::NewKeyPool()
1237 CRITICAL_BLOCK(cs_wallet)
1239 CWalletDB walletdb(strWalletFile);
1240 BOOST_FOREACH(int64 nIndex, setKeyPool)
1241 walletdb.ErasePool(nIndex);
1247 int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
1248 for (int i = 0; i < nKeys; i++)
1251 walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
1252 setKeyPool.insert(nIndex);
1254 printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
1259 bool CWallet::TopUpKeyPool()
1261 CRITICAL_BLOCK(cs_wallet)
1266 CWalletDB walletdb(strWalletFile);
1269 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1270 while (setKeyPool.size() < nTargetSize+1)
1273 if (!setKeyPool.empty())
1274 nEnd = *(--setKeyPool.end()) + 1;
1275 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1276 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1277 setKeyPool.insert(nEnd);
1278 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1284 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1287 keypool.vchPubKey.clear();
1288 CRITICAL_BLOCK(cs_wallet)
1293 // Get the oldest key
1294 if(setKeyPool.empty())
1297 CWalletDB walletdb(strWalletFile);
1299 nIndex = *(setKeyPool.begin());
1300 setKeyPool.erase(setKeyPool.begin());
1301 if (!walletdb.ReadPool(nIndex, keypool))
1302 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1303 if (!HaveKey(Hash160(keypool.vchPubKey)))
1304 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1305 assert(!keypool.vchPubKey.empty());
1306 printf("keypool reserve %"PRI64d"\n", nIndex);
1310 void CWallet::KeepKey(int64 nIndex)
1312 // Remove from key pool
1315 CWalletDB walletdb(strWalletFile);
1316 walletdb.ErasePool(nIndex);
1318 printf("keypool keep %"PRI64d"\n", nIndex);
1321 void CWallet::ReturnKey(int64 nIndex)
1323 // Return to key pool
1324 CRITICAL_BLOCK(cs_wallet)
1325 setKeyPool.insert(nIndex);
1326 printf("keypool return %"PRI64d"\n", nIndex);
1329 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1333 CRITICAL_BLOCK(cs_wallet)
1335 ReserveKeyFromKeyPool(nIndex, keypool);
1338 if (fAllowReuse && !vchDefaultKey.empty())
1340 result = vchDefaultKey;
1343 if (IsLocked()) return false;
1344 result = GenerateNewKey();
1348 result = keypool.vchPubKey;
1353 int64 CWallet::GetOldestKeyPoolTime()
1357 ReserveKeyFromKeyPool(nIndex, keypool);
1361 return keypool.nTime;
1364 vector<unsigned char> CReserveKey::GetReservedKey()
1369 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1371 vchPubKey = keypool.vchPubKey;
1374 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1375 vchPubKey = pwallet->vchDefaultKey;
1378 assert(!vchPubKey.empty());
1382 void CReserveKey::KeepKey()
1385 pwallet->KeepKey(nIndex);
1390 void CReserveKey::ReturnKey()
1393 pwallet->ReturnKey(nIndex);