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 COPYING 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 if (!pwalletdbEncryption->TxnBegin())
170 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
173 if (!EncryptKeys(vMasterKey))
176 pwalletdbEncryption->TxnAbort();
177 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.
182 CCorruptAddress corruptAddress;
183 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
184 if (!pwalletdbEncryption->TxnCommit())
185 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.
187 delete pwalletdbEncryption;
188 pwalletdbEncryption = NULL;
192 Unlock(strWalletPassphrase);
196 // Need to completely rewrite the wallet file; if we don't, bdb might keep
197 // bits of the unencrypted private key in slack space in the database file.
198 CDB::Rewrite(strWalletFile);
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 (unsigned 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)
550 BOOST_FOREACH(const CTxIn& txin, tx.vin)
551 vWorkQueue.push_back(txin.prevout.hash);
557 reverse(vtxPrev.begin(), vtxPrev.end());
560 bool CWalletTx::WriteToDisk()
562 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
565 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
569 CBlockIndex* pindex = pindexStart;
570 CRITICAL_BLOCK(cs_wallet)
575 block.ReadFromDisk(pindex, true);
576 BOOST_FOREACH(CTransaction& tx, block.vtx)
578 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
581 pindex = pindex->pnext;
587 void CWallet::ReacceptWalletTransactions()
591 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
594 vector<CDiskTxPos> vMissingTx;
595 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
597 CWalletTx& wtx = item.second;
598 if (wtx.IsCoinBase() && wtx.IsSpent(0))
602 bool fUpdated = false;
603 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
605 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
606 if (txindex.vSpent.size() != wtx.vout.size())
608 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
611 for (unsigned int i = 0; i < txindex.vSpent.size(); i++)
615 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
619 vMissingTx.push_back(txindex.vSpent[i]);
624 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
631 // Reaccept any txes of ours that aren't already in a block
632 if (!wtx.IsCoinBase())
633 wtx.AcceptWalletTransaction(txdb, false);
636 if (!vMissingTx.empty())
638 // TODO: optimize this to scan just part of the block chain?
639 if (ScanForWalletTransactions(pindexGenesisBlock))
640 fRepeat = true; // Found missing transactions: re-do Reaccept.
645 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
647 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
649 if (!tx.IsCoinBase())
651 uint256 hash = tx.GetHash();
652 if (!txdb.ContainsTx(hash))
653 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
658 uint256 hash = GetHash();
659 if (!txdb.ContainsTx(hash))
661 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
662 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
667 void CWalletTx::RelayWalletTransaction()
670 RelayWalletTransaction(txdb);
673 void CWallet::ResendWalletTransactions()
675 // Do this infrequently and randomly to avoid giving away
676 // that these are our transactions.
677 static int64 nNextTime;
678 if (GetTime() < nNextTime)
680 bool fFirst = (nNextTime == 0);
681 nNextTime = GetTime() + GetRand(30 * 60);
685 // Only do it if there's been a new block since last time
686 static int64 nLastTime;
687 if (nTimeBestReceived < nLastTime)
689 nLastTime = GetTime();
691 // Rebroadcast any of our txes that aren't in a block yet
692 printf("ResendWalletTransactions()\n");
694 CRITICAL_BLOCK(cs_wallet)
696 // Sort them in chronological order
697 multimap<unsigned int, CWalletTx*> mapSorted;
698 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
700 CWalletTx& wtx = item.second;
701 // Don't rebroadcast until it's had plenty of time that
702 // it should have gotten in already by now.
703 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
704 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
706 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
708 CWalletTx& wtx = *item.second;
709 wtx.RelayWalletTransaction(txdb);
719 //////////////////////////////////////////////////////////////////////////////
725 int64 CWallet::GetBalance() const
728 CRITICAL_BLOCK(cs_wallet)
730 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
732 const CWalletTx* pcoin = &(*it).second;
733 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
735 nTotal += pcoin->GetAvailableCredit();
743 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
748 // List of values less than target
749 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
750 coinLowestLarger.first = INT64_MAX;
751 coinLowestLarger.second.first = NULL;
752 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
753 int64 nTotalLower = 0;
755 CRITICAL_BLOCK(cs_wallet)
757 vector<const CWalletTx*> vCoins;
758 vCoins.reserve(mapWallet.size());
759 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
760 vCoins.push_back(&(*it).second);
761 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
763 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
765 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
768 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
771 int nDepth = pcoin->GetDepthInMainChain();
772 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
775 for (unsigned int i = 0; i < pcoin->vout.size(); i++)
777 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
780 int64 n = pcoin->vout[i].nValue;
785 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
787 if (n == nTargetValue)
789 setCoinsRet.insert(coin.second);
790 nValueRet += coin.first;
793 else if (n < nTargetValue + CENT)
795 vValue.push_back(coin);
798 else if (n < coinLowestLarger.first)
800 coinLowestLarger = coin;
806 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
808 for (unsigned int i = 0; i < vValue.size(); ++i)
810 setCoinsRet.insert(vValue[i].second);
811 nValueRet += vValue[i].first;
816 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
818 if (coinLowestLarger.second.first == NULL)
820 setCoinsRet.insert(coinLowestLarger.second);
821 nValueRet += coinLowestLarger.first;
825 if (nTotalLower >= nTargetValue + CENT)
826 nTargetValue += CENT;
828 // Solve subset sum by stochastic approximation
829 sort(vValue.rbegin(), vValue.rend());
830 vector<char> vfIncluded;
831 vector<char> vfBest(vValue.size(), true);
832 int64 nBest = nTotalLower;
834 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
836 vfIncluded.assign(vValue.size(), false);
838 bool fReachedTarget = false;
839 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
841 for (unsigned int i = 0; i < vValue.size(); i++)
843 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
845 nTotal += vValue[i].first;
846 vfIncluded[i] = true;
847 if (nTotal >= nTargetValue)
849 fReachedTarget = true;
855 nTotal -= vValue[i].first;
856 vfIncluded[i] = false;
863 // If the next larger is still closer, return it
864 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
866 setCoinsRet.insert(coinLowestLarger.second);
867 nValueRet += coinLowestLarger.first;
870 for (unsigned int i = 0; i < vValue.size(); i++)
873 setCoinsRet.insert(vValue[i].second);
874 nValueRet += vValue[i].first;
878 printf("SelectCoins() best subset: ");
879 for (unsigned int i = 0; i < vValue.size(); i++)
881 printf("%s ", FormatMoney(vValue[i].first).c_str());
882 printf("total %s\n", FormatMoney(nBest).c_str());
888 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
890 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
891 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
892 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
898 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
901 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
907 if (vecSend.empty() || nValue < 0)
910 wtxNew.pwallet = this;
912 CRITICAL_BLOCK(cs_main)
913 CRITICAL_BLOCK(cs_wallet)
915 // txdb must be opened before the mapWallet lock
918 nFeeRet = nTransactionFee;
923 wtxNew.fFromMe = true;
925 int64 nTotalValue = nValue + nFeeRet;
926 double dPriority = 0;
927 // vouts to the payees
928 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
929 wtxNew.vout.push_back(CTxOut(s.second, s.first));
931 // Choose coins to use
932 set<pair<const CWalletTx*,unsigned int> > setCoins;
934 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
936 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
938 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
939 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
942 int64 nChange = nValueIn - nValue - nFeeRet;
943 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
944 // or until nChange becomes zero
945 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
947 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
948 nChange -= nMoveToFee;
949 nFeeRet += nMoveToFee;
954 // Note: We use a new key here to keep it from being obvious which side is the change.
955 // The drawback is that by not reusing a previous key, the change may be lost if a
956 // backup is restored, if the backup doesn't have the new private key for the change.
957 // If we reused the old key, it would be possible to add code to look for and
958 // rediscover unknown transactions that were written with keys of ours to recover
959 // post-backup change.
961 // Reserve a new key pair from key pool
962 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
963 // assert(mapKeys.count(vchPubKey));
965 // Fill a vout to ourself, using same address type as the payment
966 CScript scriptChange;
967 if (vecSend[0].first.GetBitcoinAddress().IsValid())
968 scriptChange.SetBitcoinAddress(vchPubKey);
970 scriptChange << vchPubKey << OP_CHECKSIG;
972 // Insert change txn at random position:
973 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
974 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
977 reservekey.ReturnKey();
980 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
981 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
985 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
986 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
990 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
991 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
995 // Check that enough fee is included
996 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
997 bool fAllowFree = CTransaction::AllowFree(dPriority);
998 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
999 if (nFeeRet < max(nPayFee, nMinFee))
1001 nFeeRet = max(nPayFee, nMinFee);
1005 // Fill vtxPrev by copying from previous transactions vtxPrev
1006 wtxNew.AddSupportingTransactions(txdb);
1007 wtxNew.fTimeReceivedIsTxTime = true;
1016 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1018 vector< pair<CScript, int64> > vecSend;
1019 vecSend.push_back(make_pair(scriptPubKey, nValue));
1020 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1023 // Call after CreateTransaction unless you want to abort
1024 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1026 CRITICAL_BLOCK(cs_main)
1027 CRITICAL_BLOCK(cs_wallet)
1029 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1031 // This is only to keep the database open to defeat the auto-flush for the
1032 // duration of this scope. This is the only place where this optimization
1033 // maybe makes sense; please don't do it anywhere else.
1034 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1036 // Take key pair from key pool so it won't be used again
1037 reservekey.KeepKey();
1039 // Add tx to wallet, because if it has change it's also ours,
1040 // otherwise just for transaction history.
1041 AddToWallet(wtxNew);
1043 // Mark old coins as spent
1044 set<CWalletTx*> setCoins;
1045 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1047 CWalletTx &coin = mapWallet[txin.prevout.hash];
1048 coin.pwallet = this;
1049 coin.MarkSpent(txin.prevout.n);
1051 vWalletUpdated.push_back(coin.GetHash());
1058 // Track how many getdata requests our transaction gets
1059 mapRequestCount[wtxNew.GetHash()] = 0;
1062 if (!wtxNew.AcceptToMemoryPool())
1064 // This must not fail. The transaction has already been signed and recorded.
1065 printf("CommitTransaction() : Error: Transaction not valid");
1068 wtxNew.RelayWalletTransaction();
1077 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1079 CReserveKey reservekey(this);
1084 string strError = _("Error: Wallet locked, unable to create transaction ");
1085 printf("SendMoney() : %s", strError.c_str());
1088 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1091 if (nValue + nFeeRequired > GetBalance())
1092 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());
1094 strError = _("Error: Transaction creation failed ");
1095 printf("SendMoney() : %s", strError.c_str());
1099 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1102 if (!CommitTransaction(wtxNew, reservekey))
1103 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.");
1111 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1115 return _("Invalid amount");
1116 if (nValue + nTransactionFee > GetBalance())
1117 return _("Insufficient funds");
1119 // Parse bitcoin address
1120 CScript scriptPubKey;
1121 scriptPubKey.SetBitcoinAddress(address);
1123 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1129 int CWallet::LoadWallet(bool& fFirstRunRet)
1133 fFirstRunRet = false;
1134 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1135 if (nLoadWalletRet == DB_NEED_REWRITE)
1137 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1140 // Note: can't top-up keypool here, because wallet is locked.
1141 // User will be prompted to unlock wallet the next operation
1142 // the requires a new key.
1144 nLoadWalletRet = DB_NEED_REWRITE;
1147 if (nLoadWalletRet != DB_LOAD_OK)
1148 return nLoadWalletRet;
1149 fFirstRunRet = vchDefaultKey.empty();
1151 if (!HaveKey(Hash160(vchDefaultKey)))
1153 // Create new keyUser and set as default key
1154 RandAddSeedPerfmon();
1156 std::vector<unsigned char> newDefaultKey;
1157 if (!GetKeyFromPool(newDefaultKey, false))
1158 return DB_LOAD_FAIL;
1159 SetDefaultKey(newDefaultKey);
1160 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1161 return DB_LOAD_FAIL;
1164 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1169 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1171 mapAddressBook[address] = strName;
1174 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1177 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1179 mapAddressBook.erase(address);
1182 return CWalletDB(strWalletFile).EraseName(address.ToString());
1186 void CWallet::PrintWallet(const CBlock& block)
1188 CRITICAL_BLOCK(cs_wallet)
1190 if (mapWallet.count(block.vtx[0].GetHash()))
1192 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1193 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1199 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1201 CRITICAL_BLOCK(cs_wallet)
1203 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1204 if (mi != mapWallet.end())
1213 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1217 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1220 vchDefaultKey = vchPubKey;
1224 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1226 if (!pwallet->fFileBacked)
1228 strWalletFileOut = pwallet->strWalletFile;
1233 // Mark old keypool keys as used,
1234 // and generate all new keys
1236 bool CWallet::NewKeyPool()
1238 CRITICAL_BLOCK(cs_wallet)
1240 CWalletDB walletdb(strWalletFile);
1241 BOOST_FOREACH(int64 nIndex, setKeyPool)
1242 walletdb.ErasePool(nIndex);
1248 int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
1249 for (int i = 0; i < nKeys; i++)
1252 walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
1253 setKeyPool.insert(nIndex);
1255 printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
1260 bool CWallet::TopUpKeyPool()
1262 CRITICAL_BLOCK(cs_wallet)
1267 CWalletDB walletdb(strWalletFile);
1270 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1271 while (setKeyPool.size() < nTargetSize+1)
1274 if (!setKeyPool.empty())
1275 nEnd = *(--setKeyPool.end()) + 1;
1276 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1277 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1278 setKeyPool.insert(nEnd);
1279 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1285 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1288 keypool.vchPubKey.clear();
1289 CRITICAL_BLOCK(cs_wallet)
1294 // Get the oldest key
1295 if(setKeyPool.empty())
1298 CWalletDB walletdb(strWalletFile);
1300 nIndex = *(setKeyPool.begin());
1301 setKeyPool.erase(setKeyPool.begin());
1302 if (!walletdb.ReadPool(nIndex, keypool))
1303 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1304 if (!HaveKey(Hash160(keypool.vchPubKey)))
1305 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1306 assert(!keypool.vchPubKey.empty());
1307 printf("keypool reserve %"PRI64d"\n", nIndex);
1311 void CWallet::KeepKey(int64 nIndex)
1313 // Remove from key pool
1316 CWalletDB walletdb(strWalletFile);
1317 walletdb.ErasePool(nIndex);
1319 printf("keypool keep %"PRI64d"\n", nIndex);
1322 void CWallet::ReturnKey(int64 nIndex)
1324 // Return to key pool
1325 CRITICAL_BLOCK(cs_wallet)
1326 setKeyPool.insert(nIndex);
1327 printf("keypool return %"PRI64d"\n", nIndex);
1330 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1334 CRITICAL_BLOCK(cs_wallet)
1336 ReserveKeyFromKeyPool(nIndex, keypool);
1339 if (fAllowReuse && !vchDefaultKey.empty())
1341 result = vchDefaultKey;
1344 if (IsLocked()) return false;
1345 result = GenerateNewKey();
1349 result = keypool.vchPubKey;
1354 int64 CWallet::GetOldestKeyPoolTime()
1358 ReserveKeyFromKeyPool(nIndex, keypool);
1362 return keypool.nTime;
1365 vector<unsigned char> CReserveKey::GetReservedKey()
1370 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1372 vchPubKey = keypool.vchPubKey;
1375 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1376 vchPubKey = pwallet->vchDefaultKey;
1379 assert(!vchPubKey.empty());
1383 void CReserveKey::KeepKey()
1386 pwallet->KeepKey(nIndex);
1391 void CReserveKey::ReturnKey()
1394 pwallet->ReturnKey(nIndex);