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 delete pwalletdbEncryption;
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 CDB::Rewrite(strWalletFile);
203 void CWallet::WalletUpdateSpent(const CTransaction &tx)
205 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
206 // Update the wallet spent flag if it doesn't know due to wallet.dat being
207 // restored from backup or the user making copies of wallet.dat.
208 CRITICAL_BLOCK(cs_wallet)
210 BOOST_FOREACH(const CTxIn& txin, tx.vin)
212 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
213 if (mi != mapWallet.end())
215 CWalletTx& wtx = (*mi).second;
216 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
218 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
219 wtx.MarkSpent(txin.prevout.n);
221 vWalletUpdated.push_back(txin.prevout.hash);
228 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
230 uint256 hash = wtxIn.GetHash();
231 CRITICAL_BLOCK(cs_wallet)
233 // Inserts only if not already there, returns tx inserted or tx found
234 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
235 CWalletTx& wtx = (*ret.first).second;
237 bool fInsertedNew = ret.second;
239 wtx.nTimeReceived = GetAdjustedTime();
241 bool fUpdated = false;
245 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
247 wtx.hashBlock = wtxIn.hashBlock;
250 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
252 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
253 wtx.nIndex = wtxIn.nIndex;
256 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
258 wtx.fFromMe = wtxIn.fFromMe;
261 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
265 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
268 if (fInsertedNew || fUpdated)
269 if (!wtx.WriteToDisk())
272 // If default receiving address gets used, replace it with a new one
273 CScript scriptDefaultKey;
274 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
275 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
277 if (txout.scriptPubKey == scriptDefaultKey)
279 std::vector<unsigned char> newDefaultKey;
280 if (GetKeyFromPool(newDefaultKey, false))
282 SetDefaultKey(newDefaultKey);
283 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
289 vWalletUpdated.push_back(hash);
291 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
292 WalletUpdateSpent(wtx);
300 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
302 uint256 hash = tx.GetHash();
303 CRITICAL_BLOCK(cs_wallet)
305 bool fExisted = mapWallet.count(hash);
306 if (fExisted && !fUpdate) return false;
307 if (fExisted || IsMine(tx) || IsFromMe(tx))
309 CWalletTx wtx(this,tx);
310 // Get merkle branch if transaction was found in a block
312 wtx.SetMerkleBranch(pblock);
313 return AddToWallet(wtx);
316 WalletUpdateSpent(tx);
321 bool CWallet::EraseFromWallet(uint256 hash)
325 CRITICAL_BLOCK(cs_wallet)
327 if (mapWallet.erase(hash))
328 CWalletDB(strWalletFile).EraseTx(hash);
334 bool CWallet::IsMine(const CTxIn &txin) const
336 CRITICAL_BLOCK(cs_wallet)
338 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
339 if (mi != mapWallet.end())
341 const CWalletTx& prev = (*mi).second;
342 if (txin.prevout.n < prev.vout.size())
343 if (IsMine(prev.vout[txin.prevout.n]))
350 int64 CWallet::GetDebit(const CTxIn &txin) const
352 CRITICAL_BLOCK(cs_wallet)
354 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
355 if (mi != mapWallet.end())
357 const CWalletTx& prev = (*mi).second;
358 if (txin.prevout.n < prev.vout.size())
359 if (IsMine(prev.vout[txin.prevout.n]))
360 return prev.vout[txin.prevout.n].nValue;
366 int64 CWalletTx::GetTxTime() const
368 return nTimeReceived;
371 int CWalletTx::GetRequestCount() const
373 // Returns -1 if it wasn't being tracked
375 CRITICAL_BLOCK(pwallet->cs_wallet)
382 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
383 if (mi != pwallet->mapRequestCount.end())
384 nRequests = (*mi).second;
389 // Did anyone request this transaction?
390 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
391 if (mi != pwallet->mapRequestCount.end())
393 nRequests = (*mi).second;
395 // How about the block it's in?
396 if (nRequests == 0 && hashBlock != 0)
398 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
399 if (mi != pwallet->mapRequestCount.end())
400 nRequests = (*mi).second;
402 nRequests = 1; // If it's in someone else's block it must have got out
410 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
411 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
413 nGeneratedImmature = nGeneratedMature = nFee = 0;
414 listReceived.clear();
416 strSentAccount = strFromAccount;
420 if (GetBlocksToMaturity() > 0)
421 nGeneratedImmature = pwallet->GetCredit(*this);
423 nGeneratedMature = GetCredit();
428 int64 nDebit = GetDebit();
429 if (nDebit > 0) // debit>0 means we signed/sent this transaction
431 int64 nValueOut = GetValueOut();
432 nFee = nDebit - nValueOut;
435 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
436 // but non-standard clients might (so return a list of address/amount pairs)
437 BOOST_FOREACH(const CTxOut& txout, vout)
439 CBitcoinAddress address;
440 vector<unsigned char> vchPubKey;
441 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
443 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
444 this->GetHash().ToString().c_str());
445 address = " unknown ";
448 // Don't report 'change' txouts
449 if (nDebit > 0 && pwallet->IsChange(txout))
453 listSent.push_back(make_pair(address, txout.nValue));
455 if (pwallet->IsMine(txout))
456 listReceived.push_back(make_pair(address, txout.nValue));
461 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
462 int64& nSent, int64& nFee) const
464 nGenerated = nReceived = nSent = nFee = 0;
466 int64 allGeneratedImmature, allGeneratedMature, allFee;
467 allGeneratedImmature = allGeneratedMature = allFee = 0;
468 string strSentAccount;
469 list<pair<CBitcoinAddress, int64> > listReceived;
470 list<pair<CBitcoinAddress, int64> > listSent;
471 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
473 if (strAccount == "")
474 nGenerated = allGeneratedMature;
475 if (strAccount == strSentAccount)
477 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
481 CRITICAL_BLOCK(pwallet->cs_wallet)
483 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
485 if (pwallet->mapAddressBook.count(r.first))
487 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
488 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
489 nReceived += r.second;
491 else if (strAccount.empty())
493 nReceived += r.second;
499 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
503 const int COPY_DEPTH = 3;
504 if (SetMerkleBranch() < COPY_DEPTH)
506 vector<uint256> vWorkQueue;
507 BOOST_FOREACH(const CTxIn& txin, vin)
508 vWorkQueue.push_back(txin.prevout.hash);
510 // This critsect is OK because txdb is already open
511 CRITICAL_BLOCK(pwallet->cs_wallet)
513 map<uint256, const CMerkleTx*> mapWalletPrev;
514 set<uint256> setAlreadyDone;
515 for (unsigned int i = 0; i < vWorkQueue.size(); i++)
517 uint256 hash = vWorkQueue[i];
518 if (setAlreadyDone.count(hash))
520 setAlreadyDone.insert(hash);
523 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
524 if (mi != pwallet->mapWallet.end())
527 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
528 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
530 else if (mapWalletPrev.count(hash))
532 tx = *mapWalletPrev[hash];
534 else if (!fClient && txdb.ReadDiskTx(hash, tx))
540 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
544 int nDepth = tx.SetMerkleBranch();
545 vtxPrev.push_back(tx);
547 if (nDepth < COPY_DEPTH)
549 BOOST_FOREACH(const CTxIn& txin, tx.vin)
550 vWorkQueue.push_back(txin.prevout.hash);
556 reverse(vtxPrev.begin(), vtxPrev.end());
559 bool CWalletTx::WriteToDisk()
561 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
564 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
568 CBlockIndex* pindex = pindexStart;
569 CRITICAL_BLOCK(cs_wallet)
574 block.ReadFromDisk(pindex, true);
575 BOOST_FOREACH(CTransaction& tx, block.vtx)
577 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
580 pindex = pindex->pnext;
586 void CWallet::ReacceptWalletTransactions()
590 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
593 vector<CDiskTxPos> vMissingTx;
594 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
596 CWalletTx& wtx = item.second;
597 if (wtx.IsCoinBase() && wtx.IsSpent(0))
601 bool fUpdated = false;
602 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
604 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
605 if (txindex.vSpent.size() != wtx.vout.size())
607 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
610 for (unsigned int i = 0; i < txindex.vSpent.size(); i++)
614 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
618 vMissingTx.push_back(txindex.vSpent[i]);
623 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
630 // Reaccept any txes of ours that aren't already in a block
631 if (!wtx.IsCoinBase())
632 wtx.AcceptWalletTransaction(txdb, false);
635 if (!vMissingTx.empty())
637 // TODO: optimize this to scan just part of the block chain?
638 if (ScanForWalletTransactions(pindexGenesisBlock))
639 fRepeat = true; // Found missing transactions: re-do Reaccept.
644 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
646 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
648 if (!tx.IsCoinBase())
650 uint256 hash = tx.GetHash();
651 if (!txdb.ContainsTx(hash))
652 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
657 uint256 hash = GetHash();
658 if (!txdb.ContainsTx(hash))
660 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
661 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
666 void CWalletTx::RelayWalletTransaction()
669 RelayWalletTransaction(txdb);
672 void CWallet::ResendWalletTransactions()
674 // Do this infrequently and randomly to avoid giving away
675 // that these are our transactions.
676 static int64 nNextTime;
677 if (GetTime() < nNextTime)
679 bool fFirst = (nNextTime == 0);
680 nNextTime = GetTime() + GetRand(30 * 60);
684 // Only do it if there's been a new block since last time
685 static int64 nLastTime;
686 if (nTimeBestReceived < nLastTime)
688 nLastTime = GetTime();
690 // Rebroadcast any of our txes that aren't in a block yet
691 printf("ResendWalletTransactions()\n");
693 CRITICAL_BLOCK(cs_wallet)
695 // Sort them in chronological order
696 multimap<unsigned int, CWalletTx*> mapSorted;
697 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
699 CWalletTx& wtx = item.second;
700 // Don't rebroadcast until it's had plenty of time that
701 // it should have gotten in already by now.
702 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
703 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
705 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
707 CWalletTx& wtx = *item.second;
708 wtx.RelayWalletTransaction(txdb);
718 //////////////////////////////////////////////////////////////////////////////
724 int64 CWallet::GetBalance() const
727 CRITICAL_BLOCK(cs_wallet)
729 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
731 const CWalletTx* pcoin = &(*it).second;
732 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
734 nTotal += pcoin->GetAvailableCredit();
742 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
747 // List of values less than target
748 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
749 coinLowestLarger.first = INT64_MAX;
750 coinLowestLarger.second.first = NULL;
751 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
752 int64 nTotalLower = 0;
754 CRITICAL_BLOCK(cs_wallet)
756 vector<const CWalletTx*> vCoins;
757 vCoins.reserve(mapWallet.size());
758 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
759 vCoins.push_back(&(*it).second);
760 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
762 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
764 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
767 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
770 int nDepth = pcoin->GetDepthInMainChain();
771 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
774 for (unsigned int i = 0; i < pcoin->vout.size(); i++)
776 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
779 int64 n = pcoin->vout[i].nValue;
784 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
786 if (n == nTargetValue)
788 setCoinsRet.insert(coin.second);
789 nValueRet += coin.first;
792 else if (n < nTargetValue + CENT)
794 vValue.push_back(coin);
797 else if (n < coinLowestLarger.first)
799 coinLowestLarger = coin;
805 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
807 for (unsigned int i = 0; i < vValue.size(); ++i)
809 setCoinsRet.insert(vValue[i].second);
810 nValueRet += vValue[i].first;
815 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
817 if (coinLowestLarger.second.first == NULL)
819 setCoinsRet.insert(coinLowestLarger.second);
820 nValueRet += coinLowestLarger.first;
824 if (nTotalLower >= nTargetValue + CENT)
825 nTargetValue += CENT;
827 // Solve subset sum by stochastic approximation
828 sort(vValue.rbegin(), vValue.rend());
829 vector<char> vfIncluded;
830 vector<char> vfBest(vValue.size(), true);
831 int64 nBest = nTotalLower;
833 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
835 vfIncluded.assign(vValue.size(), false);
837 bool fReachedTarget = false;
838 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
840 for (unsigned int i = 0; i < vValue.size(); i++)
842 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
844 nTotal += vValue[i].first;
845 vfIncluded[i] = true;
846 if (nTotal >= nTargetValue)
848 fReachedTarget = true;
854 nTotal -= vValue[i].first;
855 vfIncluded[i] = false;
862 // If the next larger is still closer, return it
863 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
865 setCoinsRet.insert(coinLowestLarger.second);
866 nValueRet += coinLowestLarger.first;
869 for (unsigned int i = 0; i < vValue.size(); i++)
872 setCoinsRet.insert(vValue[i].second);
873 nValueRet += vValue[i].first;
877 printf("SelectCoins() best subset: ");
878 for (unsigned int i = 0; i < vValue.size(); i++)
880 printf("%s ", FormatMoney(vValue[i].first).c_str());
881 printf("total %s\n", FormatMoney(nBest).c_str());
887 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
889 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
890 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
891 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
897 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
900 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
906 if (vecSend.empty() || nValue < 0)
909 wtxNew.pwallet = this;
911 CRITICAL_BLOCK(cs_main)
912 CRITICAL_BLOCK(cs_wallet)
914 // txdb must be opened before the mapWallet lock
917 nFeeRet = nTransactionFee;
922 wtxNew.fFromMe = true;
924 int64 nTotalValue = nValue + nFeeRet;
925 double dPriority = 0;
926 // vouts to the payees
927 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
928 wtxNew.vout.push_back(CTxOut(s.second, s.first));
930 // Choose coins to use
931 set<pair<const CWalletTx*,unsigned int> > setCoins;
933 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
935 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
937 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
938 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
941 int64 nChange = nValueIn - nValue - nFeeRet;
942 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
943 // or until nChange becomes zero
944 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
946 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
947 nChange -= nMoveToFee;
948 nFeeRet += nMoveToFee;
953 // Note: We use a new key here to keep it from being obvious which side is the change.
954 // The drawback is that by not reusing a previous key, the change may be lost if a
955 // backup is restored, if the backup doesn't have the new private key for the change.
956 // If we reused the old key, it would be possible to add code to look for and
957 // rediscover unknown transactions that were written with keys of ours to recover
958 // post-backup change.
960 // Reserve a new key pair from key pool
961 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
962 // assert(mapKeys.count(vchPubKey));
964 // Fill a vout to ourself, using same address type as the payment
965 CScript scriptChange;
966 if (vecSend[0].first.GetBitcoinAddress().IsValid())
967 scriptChange.SetBitcoinAddress(vchPubKey);
969 scriptChange << vchPubKey << OP_CHECKSIG;
971 // Insert change txn at random position:
972 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
973 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
976 reservekey.ReturnKey();
979 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
980 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
984 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
985 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
989 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
990 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
994 // Check that enough fee is included
995 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
996 bool fAllowFree = CTransaction::AllowFree(dPriority);
997 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
998 if (nFeeRet < max(nPayFee, nMinFee))
1000 nFeeRet = max(nPayFee, nMinFee);
1004 // Fill vtxPrev by copying from previous transactions vtxPrev
1005 wtxNew.AddSupportingTransactions(txdb);
1006 wtxNew.fTimeReceivedIsTxTime = true;
1015 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1017 vector< pair<CScript, int64> > vecSend;
1018 vecSend.push_back(make_pair(scriptPubKey, nValue));
1019 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1022 // Call after CreateTransaction unless you want to abort
1023 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1025 CRITICAL_BLOCK(cs_main)
1026 CRITICAL_BLOCK(cs_wallet)
1028 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1030 // This is only to keep the database open to defeat the auto-flush for the
1031 // duration of this scope. This is the only place where this optimization
1032 // maybe makes sense; please don't do it anywhere else.
1033 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1035 // Take key pair from key pool so it won't be used again
1036 reservekey.KeepKey();
1038 // Add tx to wallet, because if it has change it's also ours,
1039 // otherwise just for transaction history.
1040 AddToWallet(wtxNew);
1042 // Mark old coins as spent
1043 set<CWalletTx*> setCoins;
1044 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1046 CWalletTx &coin = mapWallet[txin.prevout.hash];
1047 coin.pwallet = this;
1048 coin.MarkSpent(txin.prevout.n);
1050 vWalletUpdated.push_back(coin.GetHash());
1057 // Track how many getdata requests our transaction gets
1058 mapRequestCount[wtxNew.GetHash()] = 0;
1061 if (!wtxNew.AcceptToMemoryPool())
1063 // This must not fail. The transaction has already been signed and recorded.
1064 printf("CommitTransaction() : Error: Transaction not valid");
1067 wtxNew.RelayWalletTransaction();
1076 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1078 CReserveKey reservekey(this);
1083 string strError = _("Error: Wallet locked, unable to create transaction ");
1084 printf("SendMoney() : %s", strError.c_str());
1087 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1090 if (nValue + nFeeRequired > GetBalance())
1091 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());
1093 strError = _("Error: Transaction creation failed ");
1094 printf("SendMoney() : %s", strError.c_str());
1098 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1101 if (!CommitTransaction(wtxNew, reservekey))
1102 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.");
1110 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1114 return _("Invalid amount");
1115 if (nValue + nTransactionFee > GetBalance())
1116 return _("Insufficient funds");
1118 // Parse bitcoin address
1119 CScript scriptPubKey;
1120 scriptPubKey.SetBitcoinAddress(address);
1122 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1128 int CWallet::LoadWallet(bool& fFirstRunRet)
1132 fFirstRunRet = false;
1133 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1134 if (nLoadWalletRet == DB_NEED_REWRITE)
1136 if (CDB::Rewrite(strWalletFile, "\x04pool"))
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);