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;
192 // Need to completely rewrite the wallet file; if we don't, bdb might keep
193 // bits of the unencrypted private key in slack space in the database file.
195 CDB::Rewrite(strWalletFile, "\x04pool");
201 void CWallet::WalletUpdateSpent(const CTransaction &tx)
203 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
204 // Update the wallet spent flag if it doesn't know due to wallet.dat being
205 // restored from backup or the user making copies of wallet.dat.
206 CRITICAL_BLOCK(cs_wallet)
208 BOOST_FOREACH(const CTxIn& txin, tx.vin)
210 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
211 if (mi != mapWallet.end())
213 CWalletTx& wtx = (*mi).second;
214 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
216 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
217 wtx.MarkSpent(txin.prevout.n);
219 vWalletUpdated.push_back(txin.prevout.hash);
226 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
228 uint256 hash = wtxIn.GetHash();
229 CRITICAL_BLOCK(cs_wallet)
231 // Inserts only if not already there, returns tx inserted or tx found
232 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
233 CWalletTx& wtx = (*ret.first).second;
235 bool fInsertedNew = ret.second;
237 wtx.nTimeReceived = GetAdjustedTime();
239 bool fUpdated = false;
243 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
245 wtx.hashBlock = wtxIn.hashBlock;
248 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
250 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
251 wtx.nIndex = wtxIn.nIndex;
254 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
256 wtx.fFromMe = wtxIn.fFromMe;
259 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
263 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
266 if (fInsertedNew || fUpdated)
267 if (!wtx.WriteToDisk())
270 // If default receiving address gets used, replace it with a new one
271 CScript scriptDefaultKey;
272 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
273 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
275 if (txout.scriptPubKey == scriptDefaultKey)
277 std::vector<unsigned char> newDefaultKey;
278 if (GetKeyFromPool(newDefaultKey, false))
280 SetDefaultKey(newDefaultKey);
281 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
287 vWalletUpdated.push_back(hash);
289 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
290 WalletUpdateSpent(wtx);
298 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
300 uint256 hash = tx.GetHash();
301 CRITICAL_BLOCK(cs_wallet)
303 bool fExisted = mapWallet.count(hash);
304 if (fExisted && !fUpdate) return false;
305 if (fExisted || IsMine(tx) || IsFromMe(tx))
307 CWalletTx wtx(this,tx);
308 // Get merkle branch if transaction was found in a block
310 wtx.SetMerkleBranch(pblock);
311 return AddToWallet(wtx);
314 WalletUpdateSpent(tx);
319 bool CWallet::EraseFromWallet(uint256 hash)
323 CRITICAL_BLOCK(cs_wallet)
325 if (mapWallet.erase(hash))
326 CWalletDB(strWalletFile).EraseTx(hash);
332 bool CWallet::IsMine(const CTxIn &txin) const
334 CRITICAL_BLOCK(cs_wallet)
336 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
337 if (mi != mapWallet.end())
339 const CWalletTx& prev = (*mi).second;
340 if (txin.prevout.n < prev.vout.size())
341 if (IsMine(prev.vout[txin.prevout.n]))
348 int64 CWallet::GetDebit(const CTxIn &txin) const
350 CRITICAL_BLOCK(cs_wallet)
352 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
353 if (mi != mapWallet.end())
355 const CWalletTx& prev = (*mi).second;
356 if (txin.prevout.n < prev.vout.size())
357 if (IsMine(prev.vout[txin.prevout.n]))
358 return prev.vout[txin.prevout.n].nValue;
364 int64 CWalletTx::GetTxTime() const
366 return nTimeReceived;
369 int CWalletTx::GetRequestCount() const
371 // Returns -1 if it wasn't being tracked
373 CRITICAL_BLOCK(pwallet->cs_wallet)
380 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
381 if (mi != pwallet->mapRequestCount.end())
382 nRequests = (*mi).second;
387 // Did anyone request this transaction?
388 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
389 if (mi != pwallet->mapRequestCount.end())
391 nRequests = (*mi).second;
393 // How about the block it's in?
394 if (nRequests == 0 && hashBlock != 0)
396 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
397 if (mi != pwallet->mapRequestCount.end())
398 nRequests = (*mi).second;
400 nRequests = 1; // If it's in someone else's block it must have got out
408 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
409 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
411 nGeneratedImmature = nGeneratedMature = nFee = 0;
412 listReceived.clear();
414 strSentAccount = strFromAccount;
418 if (GetBlocksToMaturity() > 0)
419 nGeneratedImmature = pwallet->GetCredit(*this);
421 nGeneratedMature = GetCredit();
426 int64 nDebit = GetDebit();
427 if (nDebit > 0) // debit>0 means we signed/sent this transaction
429 int64 nValueOut = GetValueOut();
430 nFee = nDebit - nValueOut;
433 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
434 // but non-standard clients might (so return a list of address/amount pairs)
435 BOOST_FOREACH(const CTxOut& txout, vout)
437 CBitcoinAddress address;
438 vector<unsigned char> vchPubKey;
439 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
441 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
442 this->GetHash().ToString().c_str());
443 address = " unknown ";
446 // Don't report 'change' txouts
447 if (nDebit > 0 && pwallet->IsChange(txout))
451 listSent.push_back(make_pair(address, txout.nValue));
453 if (pwallet->IsMine(txout))
454 listReceived.push_back(make_pair(address, txout.nValue));
459 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
460 int64& nSent, int64& nFee) const
462 nGenerated = nReceived = nSent = nFee = 0;
464 int64 allGeneratedImmature, allGeneratedMature, allFee;
465 allGeneratedImmature = allGeneratedMature = allFee = 0;
466 string strSentAccount;
467 list<pair<CBitcoinAddress, int64> > listReceived;
468 list<pair<CBitcoinAddress, int64> > listSent;
469 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
471 if (strAccount == "")
472 nGenerated = allGeneratedMature;
473 if (strAccount == strSentAccount)
475 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
479 CRITICAL_BLOCK(pwallet->cs_wallet)
481 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
483 if (pwallet->mapAddressBook.count(r.first))
485 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
486 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
487 nReceived += r.second;
489 else if (strAccount.empty())
491 nReceived += r.second;
497 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
501 const int COPY_DEPTH = 3;
502 if (SetMerkleBranch() < COPY_DEPTH)
504 vector<uint256> vWorkQueue;
505 BOOST_FOREACH(const CTxIn& txin, vin)
506 vWorkQueue.push_back(txin.prevout.hash);
508 // This critsect is OK because txdb is already open
509 CRITICAL_BLOCK(pwallet->cs_wallet)
511 map<uint256, const CMerkleTx*> mapWalletPrev;
512 set<uint256> setAlreadyDone;
513 for (int i = 0; i < vWorkQueue.size(); i++)
515 uint256 hash = vWorkQueue[i];
516 if (setAlreadyDone.count(hash))
518 setAlreadyDone.insert(hash);
521 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
522 if (mi != pwallet->mapWallet.end())
525 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
526 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
528 else if (mapWalletPrev.count(hash))
530 tx = *mapWalletPrev[hash];
532 else if (!fClient && txdb.ReadDiskTx(hash, tx))
538 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
542 int nDepth = tx.SetMerkleBranch();
543 vtxPrev.push_back(tx);
545 if (nDepth < COPY_DEPTH)
546 BOOST_FOREACH(const CTxIn& txin, tx.vin)
547 vWorkQueue.push_back(txin.prevout.hash);
552 reverse(vtxPrev.begin(), vtxPrev.end());
555 bool CWalletTx::WriteToDisk()
557 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
560 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
564 CBlockIndex* pindex = pindexStart;
565 CRITICAL_BLOCK(cs_wallet)
570 block.ReadFromDisk(pindex, true);
571 BOOST_FOREACH(CTransaction& tx, block.vtx)
573 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
576 pindex = pindex->pnext;
582 void CWallet::ReacceptWalletTransactions()
586 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
589 vector<CDiskTxPos> vMissingTx;
590 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
592 CWalletTx& wtx = item.second;
593 if (wtx.IsCoinBase() && wtx.IsSpent(0))
597 bool fUpdated = false;
598 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
600 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
601 if (txindex.vSpent.size() != wtx.vout.size())
603 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
606 for (int i = 0; i < txindex.vSpent.size(); i++)
610 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
614 vMissingTx.push_back(txindex.vSpent[i]);
619 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
626 // Reaccept any txes of ours that aren't already in a block
627 if (!wtx.IsCoinBase())
628 wtx.AcceptWalletTransaction(txdb, false);
631 if (!vMissingTx.empty())
633 // TODO: optimize this to scan just part of the block chain?
634 if (ScanForWalletTransactions(pindexGenesisBlock))
635 fRepeat = true; // Found missing transactions: re-do Reaccept.
640 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
642 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
644 if (!tx.IsCoinBase())
646 uint256 hash = tx.GetHash();
647 if (!txdb.ContainsTx(hash))
648 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
653 uint256 hash = GetHash();
654 if (!txdb.ContainsTx(hash))
656 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
657 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
662 void CWalletTx::RelayWalletTransaction()
665 RelayWalletTransaction(txdb);
668 void CWallet::ResendWalletTransactions()
670 // Do this infrequently and randomly to avoid giving away
671 // that these are our transactions.
672 static int64 nNextTime;
673 if (GetTime() < nNextTime)
675 bool fFirst = (nNextTime == 0);
676 nNextTime = GetTime() + GetRand(30 * 60);
680 // Only do it if there's been a new block since last time
681 static int64 nLastTime;
682 if (nTimeBestReceived < nLastTime)
684 nLastTime = GetTime();
686 // Rebroadcast any of our txes that aren't in a block yet
687 printf("ResendWalletTransactions()\n");
689 CRITICAL_BLOCK(cs_wallet)
691 // Sort them in chronological order
692 multimap<unsigned int, CWalletTx*> mapSorted;
693 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
695 CWalletTx& wtx = item.second;
696 // Don't rebroadcast until it's had plenty of time that
697 // it should have gotten in already by now.
698 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
699 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
701 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
703 CWalletTx& wtx = *item.second;
704 wtx.RelayWalletTransaction(txdb);
714 //////////////////////////////////////////////////////////////////////////////
720 int64 CWallet::GetBalance() const
723 CRITICAL_BLOCK(cs_wallet)
725 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
727 const CWalletTx* pcoin = &(*it).second;
728 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
730 nTotal += pcoin->GetAvailableCredit();
738 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
743 // List of values less than target
744 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
745 coinLowestLarger.first = INT64_MAX;
746 coinLowestLarger.second.first = NULL;
747 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
748 int64 nTotalLower = 0;
750 CRITICAL_BLOCK(cs_wallet)
752 vector<const CWalletTx*> vCoins;
753 vCoins.reserve(mapWallet.size());
754 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
755 vCoins.push_back(&(*it).second);
756 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
758 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
760 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
763 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
766 int nDepth = pcoin->GetDepthInMainChain();
767 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
770 for (int i = 0; i < pcoin->vout.size(); i++)
772 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
775 int64 n = pcoin->vout[i].nValue;
780 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
782 if (n == nTargetValue)
784 setCoinsRet.insert(coin.second);
785 nValueRet += coin.first;
788 else if (n < nTargetValue + CENT)
790 vValue.push_back(coin);
793 else if (n < coinLowestLarger.first)
795 coinLowestLarger = coin;
801 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
803 for (int i = 0; i < vValue.size(); ++i)
805 setCoinsRet.insert(vValue[i].second);
806 nValueRet += vValue[i].first;
811 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
813 if (coinLowestLarger.second.first == NULL)
815 setCoinsRet.insert(coinLowestLarger.second);
816 nValueRet += coinLowestLarger.first;
820 if (nTotalLower >= nTargetValue + CENT)
821 nTargetValue += CENT;
823 // Solve subset sum by stochastic approximation
824 sort(vValue.rbegin(), vValue.rend());
825 vector<char> vfIncluded;
826 vector<char> vfBest(vValue.size(), true);
827 int64 nBest = nTotalLower;
829 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
831 vfIncluded.assign(vValue.size(), false);
833 bool fReachedTarget = false;
834 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
836 for (int i = 0; i < vValue.size(); i++)
838 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
840 nTotal += vValue[i].first;
841 vfIncluded[i] = true;
842 if (nTotal >= nTargetValue)
844 fReachedTarget = true;
850 nTotal -= vValue[i].first;
851 vfIncluded[i] = false;
858 // If the next larger is still closer, return it
859 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
861 setCoinsRet.insert(coinLowestLarger.second);
862 nValueRet += coinLowestLarger.first;
865 for (int i = 0; i < vValue.size(); i++)
868 setCoinsRet.insert(vValue[i].second);
869 nValueRet += vValue[i].first;
873 printf("SelectCoins() best subset: ");
874 for (int i = 0; i < vValue.size(); i++)
876 printf("%s ", FormatMoney(vValue[i].first).c_str());
877 printf("total %s\n", FormatMoney(nBest).c_str());
883 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
885 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
886 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
887 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
893 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
896 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
902 if (vecSend.empty() || nValue < 0)
905 wtxNew.pwallet = this;
907 CRITICAL_BLOCK(cs_main)
908 CRITICAL_BLOCK(cs_wallet)
910 // txdb must be opened before the mapWallet lock
913 nFeeRet = nTransactionFee;
918 wtxNew.fFromMe = true;
920 int64 nTotalValue = nValue + nFeeRet;
921 double dPriority = 0;
922 // vouts to the payees
923 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
924 wtxNew.vout.push_back(CTxOut(s.second, s.first));
926 // Choose coins to use
927 set<pair<const CWalletTx*,unsigned int> > setCoins;
929 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
931 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
933 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
934 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
937 int64 nChange = nValueIn - nValue - nFeeRet;
938 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
939 // or until nChange becomes zero
940 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
942 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
943 nChange -= nMoveToFee;
944 nFeeRet += nMoveToFee;
949 // Note: We use a new key here to keep it from being obvious which side is the change.
950 // The drawback is that by not reusing a previous key, the change may be lost if a
951 // backup is restored, if the backup doesn't have the new private key for the change.
952 // If we reused the old key, it would be possible to add code to look for and
953 // rediscover unknown transactions that were written with keys of ours to recover
954 // post-backup change.
956 // Reserve a new key pair from key pool
957 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
958 // assert(mapKeys.count(vchPubKey));
960 // Fill a vout to ourself, using same address type as the payment
961 CScript scriptChange;
962 if (vecSend[0].first.GetBitcoinAddress().IsValid())
963 scriptChange.SetBitcoinAddress(vchPubKey);
965 scriptChange << vchPubKey << OP_CHECKSIG;
967 // Insert change txn at random position:
968 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
969 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
972 reservekey.ReturnKey();
975 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
976 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
980 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
981 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
985 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
986 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
990 // Check that enough fee is included
991 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
992 bool fAllowFree = CTransaction::AllowFree(dPriority);
993 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
994 if (nFeeRet < max(nPayFee, nMinFee))
996 nFeeRet = max(nPayFee, nMinFee);
1000 // Fill vtxPrev by copying from previous transactions vtxPrev
1001 wtxNew.AddSupportingTransactions(txdb);
1002 wtxNew.fTimeReceivedIsTxTime = true;
1011 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1013 vector< pair<CScript, int64> > vecSend;
1014 vecSend.push_back(make_pair(scriptPubKey, nValue));
1015 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1018 // Call after CreateTransaction unless you want to abort
1019 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1021 CRITICAL_BLOCK(cs_main)
1022 CRITICAL_BLOCK(cs_wallet)
1024 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1026 // This is only to keep the database open to defeat the auto-flush for the
1027 // duration of this scope. This is the only place where this optimization
1028 // maybe makes sense; please don't do it anywhere else.
1029 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1031 // Take key pair from key pool so it won't be used again
1032 reservekey.KeepKey();
1034 // Add tx to wallet, because if it has change it's also ours,
1035 // otherwise just for transaction history.
1036 AddToWallet(wtxNew);
1038 // Mark old coins as spent
1039 set<CWalletTx*> setCoins;
1040 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1042 CWalletTx &coin = mapWallet[txin.prevout.hash];
1043 coin.pwallet = this;
1044 coin.MarkSpent(txin.prevout.n);
1046 vWalletUpdated.push_back(coin.GetHash());
1053 // Track how many getdata requests our transaction gets
1054 mapRequestCount[wtxNew.GetHash()] = 0;
1057 if (!wtxNew.AcceptToMemoryPool())
1059 // This must not fail. The transaction has already been signed and recorded.
1060 printf("CommitTransaction() : Error: Transaction not valid");
1063 wtxNew.RelayWalletTransaction();
1072 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1074 CReserveKey reservekey(this);
1079 string strError = _("Error: Wallet locked, unable to create transaction ");
1080 printf("SendMoney() : %s", strError.c_str());
1083 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1086 if (nValue + nFeeRequired > GetBalance())
1087 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());
1089 strError = _("Error: Transaction creation failed ");
1090 printf("SendMoney() : %s", strError.c_str());
1094 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1097 if (!CommitTransaction(wtxNew, reservekey))
1098 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.");
1106 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1110 return _("Invalid amount");
1111 if (nValue + nTransactionFee > GetBalance())
1112 return _("Insufficient funds");
1114 // Parse bitcoin address
1115 CScript scriptPubKey;
1116 scriptPubKey.SetBitcoinAddress(address);
1118 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1124 int CWallet::LoadWallet(bool& fFirstRunRet)
1128 fFirstRunRet = false;
1129 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1130 if (nLoadWalletRet == DB_NEED_REWRITE)
1132 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1135 // Note: can't top-up keypool here, because wallet is locked.
1136 // User will be prompted to unlock wallet the next operation
1137 // the requires a new key.
1139 nLoadWalletRet = DB_NEED_REWRITE;
1142 if (nLoadWalletRet != DB_LOAD_OK)
1143 return nLoadWalletRet;
1144 fFirstRunRet = vchDefaultKey.empty();
1146 if (!HaveKey(Hash160(vchDefaultKey)))
1148 // Create new keyUser and set as default key
1149 RandAddSeedPerfmon();
1151 std::vector<unsigned char> newDefaultKey;
1152 if (!GetKeyFromPool(newDefaultKey, false))
1153 return DB_LOAD_FAIL;
1154 SetDefaultKey(newDefaultKey);
1155 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1156 return DB_LOAD_FAIL;
1159 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1164 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1166 mapAddressBook[address] = strName;
1169 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1172 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1174 mapAddressBook.erase(address);
1177 return CWalletDB(strWalletFile).EraseName(address.ToString());
1181 void CWallet::PrintWallet(const CBlock& block)
1183 CRITICAL_BLOCK(cs_wallet)
1185 if (mapWallet.count(block.vtx[0].GetHash()))
1187 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1188 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1194 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1196 CRITICAL_BLOCK(cs_wallet)
1198 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1199 if (mi != mapWallet.end())
1208 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1212 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1215 vchDefaultKey = vchPubKey;
1219 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1221 if (!pwallet->fFileBacked)
1223 strWalletFileOut = pwallet->strWalletFile;
1227 bool CWallet::TopUpKeyPool()
1229 CRITICAL_BLOCK(cs_wallet)
1234 CWalletDB walletdb(strWalletFile);
1237 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1238 while (setKeyPool.size() < nTargetSize+1)
1241 if (!setKeyPool.empty())
1242 nEnd = *(--setKeyPool.end()) + 1;
1243 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1244 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1245 setKeyPool.insert(nEnd);
1246 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1252 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1255 keypool.vchPubKey.clear();
1256 CRITICAL_BLOCK(cs_wallet)
1261 // Get the oldest key
1262 if(setKeyPool.empty())
1265 CWalletDB walletdb(strWalletFile);
1267 nIndex = *(setKeyPool.begin());
1268 setKeyPool.erase(setKeyPool.begin());
1269 if (!walletdb.ReadPool(nIndex, keypool))
1270 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1271 if (!HaveKey(Hash160(keypool.vchPubKey)))
1272 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1273 assert(!keypool.vchPubKey.empty());
1274 printf("keypool reserve %"PRI64d"\n", nIndex);
1278 void CWallet::KeepKey(int64 nIndex)
1280 // Remove from key pool
1283 CWalletDB walletdb(strWalletFile);
1284 walletdb.ErasePool(nIndex);
1286 printf("keypool keep %"PRI64d"\n", nIndex);
1289 void CWallet::ReturnKey(int64 nIndex)
1291 // Return to key pool
1292 CRITICAL_BLOCK(cs_wallet)
1293 setKeyPool.insert(nIndex);
1294 printf("keypool return %"PRI64d"\n", nIndex);
1297 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1301 CRITICAL_BLOCK(cs_wallet)
1303 ReserveKeyFromKeyPool(nIndex, keypool);
1306 if (fAllowReuse && !vchDefaultKey.empty())
1308 result = vchDefaultKey;
1311 if (IsLocked()) return false;
1312 result = GenerateNewKey();
1316 result = keypool.vchPubKey;
1321 int64 CWallet::GetOldestKeyPoolTime()
1325 ReserveKeyFromKeyPool(nIndex, keypool);
1329 return keypool.nTime;
1332 vector<unsigned char> CReserveKey::GetReservedKey()
1337 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1339 vchPubKey = keypool.vchPubKey;
1342 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1343 vchPubKey = pwallet->vchDefaultKey;
1346 assert(!vchPubKey.empty());
1350 void CReserveKey::KeepKey()
1353 pwallet->KeepKey(nIndex);
1358 void CReserveKey::ReturnKey()
1361 pwallet->ReturnKey(nIndex);