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.
13 //////////////////////////////////////////////////////////////////////////////
18 bool CWallet::AddKey(const CKey& key)
20 if (!CCryptoKeyStore::AddKey(key))
25 return CWalletDB(strWalletFile).WriteKey(key.GetPubKey(), key.GetPrivKey());
29 bool CWallet::AddCryptedKey(const vector<unsigned char> &vchPubKey, const vector<unsigned char> &vchCryptedSecret)
31 if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
35 CRITICAL_BLOCK(cs_wallet)
37 if (pwalletdbEncryption)
38 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
40 return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
45 bool CWallet::Unlock(const string& strWalletPassphrase)
51 CKeyingMaterial vMasterKey;
53 CRITICAL_BLOCK(cs_wallet)
54 BOOST_FOREACH(const MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
56 if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
58 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
60 if (CCryptoKeyStore::Unlock(vMasterKey))
66 bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const string& strNewWalletPassphrase)
68 bool fWasLocked = IsLocked();
70 CRITICAL_BLOCK(cs_wallet)
75 CKeyingMaterial vMasterKey;
76 BOOST_FOREACH(MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
78 if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
80 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
82 if (CCryptoKeyStore::Unlock(vMasterKey))
84 int64 nStartTime = GetTimeMillis();
85 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
86 pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
88 nStartTime = GetTimeMillis();
89 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
90 pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
92 if (pMasterKey.second.nDeriveIterations < 25000)
93 pMasterKey.second.nDeriveIterations = 25000;
95 printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
97 if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
99 if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey))
101 CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
113 // This class implements an addrIncoming entry that causes pre-0.4
114 // clients to crash on startup if reading a private-key-encrypted wallet.
115 class CCorruptAddress
120 if (nType & SER_DISK)
125 bool CWallet::EncryptWallet(const string& strWalletPassphrase)
130 CKeyingMaterial vMasterKey;
131 RandAddSeedPerfmon();
133 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
134 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
136 CMasterKey kMasterKey;
138 RandAddSeedPerfmon();
139 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
140 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
143 int64 nStartTime = GetTimeMillis();
144 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
145 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
147 nStartTime = GetTimeMillis();
148 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
149 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
151 if (kMasterKey.nDeriveIterations < 25000)
152 kMasterKey.nDeriveIterations = 25000;
154 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
156 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
158 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
161 CRITICAL_BLOCK(cs_wallet)
163 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
166 pwalletdbEncryption = new CWalletDB(strWalletFile);
167 pwalletdbEncryption->TxnBegin();
168 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
171 if (!EncryptKeys(vMasterKey))
174 pwalletdbEncryption->TxnAbort();
175 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.
180 CCorruptAddress corruptAddress;
181 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
182 if (!pwalletdbEncryption->TxnCommit())
183 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.
185 pwalletdbEncryption->Close();
186 pwalletdbEncryption = NULL;
192 if (Resilver(strWalletFile))
193 CWalletDB(strWalletFile, "r+").WriteSetting("fIsResilvered", true);
198 void CWallet::WalletUpdateSpent(const CTransaction &tx)
200 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
201 // Update the wallet spent flag if it doesn't know due to wallet.dat being
202 // restored from backup or the user making copies of wallet.dat.
203 CRITICAL_BLOCK(cs_wallet)
205 BOOST_FOREACH(const CTxIn& txin, tx.vin)
207 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
208 if (mi != mapWallet.end())
210 CWalletTx& wtx = (*mi).second;
211 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
213 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
214 wtx.MarkSpent(txin.prevout.n);
216 vWalletUpdated.push_back(txin.prevout.hash);
223 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
225 uint256 hash = wtxIn.GetHash();
226 CRITICAL_BLOCK(cs_wallet)
228 // Inserts only if not already there, returns tx inserted or tx found
229 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
230 CWalletTx& wtx = (*ret.first).second;
232 bool fInsertedNew = ret.second;
234 wtx.nTimeReceived = GetAdjustedTime();
236 bool fUpdated = false;
240 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
242 wtx.hashBlock = wtxIn.hashBlock;
245 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
247 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
248 wtx.nIndex = wtxIn.nIndex;
251 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
253 wtx.fFromMe = wtxIn.fFromMe;
256 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
260 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
263 if (fInsertedNew || fUpdated)
264 if (!wtx.WriteToDisk())
267 // If default receiving address gets used, replace it with a new one
268 CScript scriptDefaultKey;
269 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
270 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
272 if (txout.scriptPubKey == scriptDefaultKey)
274 std::vector<unsigned char> newDefaultKey;
275 if (GetKeyFromPool(newDefaultKey, false))
277 SetDefaultKey(newDefaultKey);
278 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
284 vWalletUpdated.push_back(hash);
286 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
287 WalletUpdateSpent(wtx);
295 // Add a transaction to the wallet, or update it.
296 // pblock is optional, but should be provided if the transaction is known to be in a block.
297 // If fUpdate is true, existing transactions will be updated.
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 // Scan the block chain (starting in pindexStart) for transactions
561 // from or to us. If fUpdate is true, found transactions that already
562 // exist in the wallet will be updated.
563 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
567 CBlockIndex* pindex = pindexStart;
568 CRITICAL_BLOCK(cs_wallet)
573 block.ReadFromDisk(pindex, true);
574 BOOST_FOREACH(CTransaction& tx, block.vtx)
576 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
579 pindex = pindex->pnext;
585 void CWallet::ReacceptWalletTransactions()
589 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
592 vector<CDiskTxPos> vMissingTx;
593 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
595 CWalletTx& wtx = item.second;
596 if (wtx.IsCoinBase() && wtx.IsSpent(0))
600 bool fUpdated = false;
601 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
603 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
604 if (txindex.vSpent.size() != wtx.vout.size())
606 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
609 for (int i = 0; i < txindex.vSpent.size(); i++)
613 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
617 vMissingTx.push_back(txindex.vSpent[i]);
622 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
629 // Reaccept any txes of ours that aren't already in a block
630 if (!wtx.IsCoinBase())
631 wtx.AcceptWalletTransaction(txdb, false);
634 if (!vMissingTx.empty())
636 // TODO: optimize this to scan just part of the block chain?
637 if (ScanForWalletTransactions(pindexGenesisBlock))
638 fRepeat = true; // Found missing transactions: re-do Reaccept.
643 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
645 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
647 if (!tx.IsCoinBase())
649 uint256 hash = tx.GetHash();
650 if (!txdb.ContainsTx(hash))
651 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
656 uint256 hash = GetHash();
657 if (!txdb.ContainsTx(hash))
659 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
660 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
665 void CWalletTx::RelayWalletTransaction()
668 RelayWalletTransaction(txdb);
671 void CWallet::ResendWalletTransactions()
673 // Do this infrequently and randomly to avoid giving away
674 // that these are our transactions.
675 static int64 nNextTime;
676 if (GetTime() < nNextTime)
678 bool fFirst = (nNextTime == 0);
679 nNextTime = GetTime() + GetRand(30 * 60);
683 // Only do it if there's been a new block since last time
684 static int64 nLastTime;
685 if (nTimeBestReceived < nLastTime)
687 nLastTime = GetTime();
689 // Rebroadcast any of our txes that aren't in a block yet
690 printf("ResendWalletTransactions()\n");
692 CRITICAL_BLOCK(cs_wallet)
694 // Sort them in chronological order
695 multimap<unsigned int, CWalletTx*> mapSorted;
696 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
698 CWalletTx& wtx = item.second;
699 // Don't rebroadcast until it's had plenty of time that
700 // it should have gotten in already by now.
701 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
702 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
704 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
706 CWalletTx& wtx = *item.second;
707 wtx.RelayWalletTransaction(txdb);
717 //////////////////////////////////////////////////////////////////////////////
723 int64 CWallet::GetBalance() const
726 CRITICAL_BLOCK(cs_wallet)
728 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
730 const CWalletTx* pcoin = &(*it).second;
731 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
733 nTotal += pcoin->GetAvailableCredit();
740 int64 CWallet::GetUnconfirmedBalance() const
743 CRITICAL_BLOCK(cs_wallet)
745 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
747 const CWalletTx* pcoin = &(*it).second;
748 if (pcoin->IsFinal() && pcoin->IsConfirmed())
750 nTotal += pcoin->GetAvailableCredit();
756 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
761 // List of values less than target
762 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
763 coinLowestLarger.first = INT64_MAX;
764 coinLowestLarger.second.first = NULL;
765 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
766 int64 nTotalLower = 0;
768 CRITICAL_BLOCK(cs_wallet)
770 vector<const CWalletTx*> vCoins;
771 vCoins.reserve(mapWallet.size());
772 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
773 vCoins.push_back(&(*it).second);
774 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
776 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
778 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
781 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
784 int nDepth = pcoin->GetDepthInMainChain();
785 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
788 for (int i = 0; i < pcoin->vout.size(); i++)
790 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
793 int64 n = pcoin->vout[i].nValue;
798 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
800 if (n == nTargetValue)
802 setCoinsRet.insert(coin.second);
803 nValueRet += coin.first;
806 else if (n < nTargetValue + CENT)
808 vValue.push_back(coin);
811 else if (n < coinLowestLarger.first)
813 coinLowestLarger = coin;
819 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
821 for (int i = 0; i < vValue.size(); ++i)
823 setCoinsRet.insert(vValue[i].second);
824 nValueRet += vValue[i].first;
829 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
831 if (coinLowestLarger.second.first == NULL)
833 setCoinsRet.insert(coinLowestLarger.second);
834 nValueRet += coinLowestLarger.first;
838 if (nTotalLower >= nTargetValue + CENT)
839 nTargetValue += CENT;
841 // Solve subset sum by stochastic approximation
842 sort(vValue.rbegin(), vValue.rend());
843 vector<char> vfIncluded;
844 vector<char> vfBest(vValue.size(), true);
845 int64 nBest = nTotalLower;
847 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
849 vfIncluded.assign(vValue.size(), false);
851 bool fReachedTarget = false;
852 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
854 for (int i = 0; i < vValue.size(); i++)
856 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
858 nTotal += vValue[i].first;
859 vfIncluded[i] = true;
860 if (nTotal >= nTargetValue)
862 fReachedTarget = true;
868 nTotal -= vValue[i].first;
869 vfIncluded[i] = false;
876 // If the next larger is still closer, return it
877 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
879 setCoinsRet.insert(coinLowestLarger.second);
880 nValueRet += coinLowestLarger.first;
883 for (int i = 0; i < vValue.size(); i++)
886 setCoinsRet.insert(vValue[i].second);
887 nValueRet += vValue[i].first;
891 printf("SelectCoins() best subset: ");
892 for (int i = 0; i < vValue.size(); i++)
894 printf("%s ", FormatMoney(vValue[i].first).c_str());
895 printf("total %s\n", FormatMoney(nBest).c_str());
901 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
903 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
904 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
905 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
911 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
914 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
920 if (vecSend.empty() || nValue < 0)
923 wtxNew.pwallet = this;
925 CRITICAL_BLOCK(cs_main)
926 CRITICAL_BLOCK(cs_wallet)
928 // txdb must be opened before the mapWallet lock
931 nFeeRet = nTransactionFee;
936 wtxNew.fFromMe = true;
938 int64 nTotalValue = nValue + nFeeRet;
939 double dPriority = 0;
940 // vouts to the payees
941 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
942 wtxNew.vout.push_back(CTxOut(s.second, s.first));
944 // Choose coins to use
945 set<pair<const CWalletTx*,unsigned int> > setCoins;
947 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
949 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
951 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
952 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
955 int64 nChange = nValueIn - nValue - nFeeRet;
956 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
957 // or until nChange becomes zero
958 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
960 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
961 nChange -= nMoveToFee;
962 nFeeRet += nMoveToFee;
967 // Note: We use a new key here to keep it from being obvious which side is the change.
968 // The drawback is that by not reusing a previous key, the change may be lost if a
969 // backup is restored, if the backup doesn't have the new private key for the change.
970 // If we reused the old key, it would be possible to add code to look for and
971 // rediscover unknown transactions that were written with keys of ours to recover
972 // post-backup change.
974 // Reserve a new key pair from key pool
975 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
976 // assert(mapKeys.count(vchPubKey));
978 // Fill a vout to ourself, using same address type as the payment
979 CScript scriptChange;
980 if (vecSend[0].first.GetBitcoinAddress().IsValid())
981 scriptChange.SetBitcoinAddress(vchPubKey);
983 scriptChange << vchPubKey << OP_CHECKSIG;
985 // Insert change txn at random position:
986 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
987 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
990 reservekey.ReturnKey();
993 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
994 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
998 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
999 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1003 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1004 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1006 dPriority /= nBytes;
1008 // Check that enough fee is included
1009 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1010 bool fAllowFree = CTransaction::AllowFree(dPriority);
1011 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1012 if (nFeeRet < max(nPayFee, nMinFee))
1014 nFeeRet = max(nPayFee, nMinFee);
1018 // Fill vtxPrev by copying from previous transactions vtxPrev
1019 wtxNew.AddSupportingTransactions(txdb);
1020 wtxNew.fTimeReceivedIsTxTime = true;
1029 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1031 vector< pair<CScript, int64> > vecSend;
1032 vecSend.push_back(make_pair(scriptPubKey, nValue));
1033 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1036 // Call after CreateTransaction unless you want to abort
1037 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1039 CRITICAL_BLOCK(cs_main)
1040 CRITICAL_BLOCK(cs_wallet)
1042 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1044 // This is only to keep the database open to defeat the auto-flush for the
1045 // duration of this scope. This is the only place where this optimization
1046 // maybe makes sense; please don't do it anywhere else.
1047 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1049 // Take key pair from key pool so it won't be used again
1050 reservekey.KeepKey();
1052 // Add tx to wallet, because if it has change it's also ours,
1053 // otherwise just for transaction history.
1054 AddToWallet(wtxNew);
1056 // Mark old coins as spent
1057 set<CWalletTx*> setCoins;
1058 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1060 CWalletTx &coin = mapWallet[txin.prevout.hash];
1061 coin.pwallet = this;
1062 coin.MarkSpent(txin.prevout.n);
1064 vWalletUpdated.push_back(coin.GetHash());
1071 // Track how many getdata requests our transaction gets
1072 mapRequestCount[wtxNew.GetHash()] = 0;
1075 if (!wtxNew.AcceptToMemoryPool())
1077 // This must not fail. The transaction has already been signed and recorded.
1078 printf("CommitTransaction() : Error: Transaction not valid");
1081 wtxNew.RelayWalletTransaction();
1090 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1092 CReserveKey reservekey(this);
1097 string strError = _("Error: Wallet locked, unable to create transaction ");
1098 printf("SendMoney() : %s", strError.c_str());
1101 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1104 if (nValue + nFeeRequired > GetBalance())
1105 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());
1107 strError = _("Error: Transaction creation failed ");
1108 printf("SendMoney() : %s", strError.c_str());
1112 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1115 if (!CommitTransaction(wtxNew, reservekey))
1116 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.");
1124 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1128 return _("Invalid amount");
1129 if (nValue + nTransactionFee > GetBalance())
1130 return _("Insufficient funds");
1132 // Parse bitcoin address
1133 CScript scriptPubKey;
1134 scriptPubKey.SetBitcoinAddress(address);
1136 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1142 int CWallet::LoadWallet(bool& fFirstRunRet)
1146 fFirstRunRet = false;
1147 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1148 if (nLoadWalletRet == DB_NEED_RESILVER)
1150 if (Resilver(strWalletFile))
1151 CWalletDB(strWalletFile, "r+").WriteSetting("fIsResilvered", true);
1152 nLoadWalletRet = DB_LOAD_OK;
1155 if (nLoadWalletRet != DB_LOAD_OK)
1156 return nLoadWalletRet;
1157 fFirstRunRet = vchDefaultKey.empty();
1159 if (!HaveKey(Hash160(vchDefaultKey)))
1161 // Create new keyUser and set as default key
1162 RandAddSeedPerfmon();
1164 std::vector<unsigned char> newDefaultKey;
1165 if (!GetKeyFromPool(newDefaultKey, false))
1166 return DB_LOAD_FAIL;
1167 SetDefaultKey(newDefaultKey);
1168 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1169 return DB_LOAD_FAIL;
1172 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1177 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1179 mapAddressBook[address] = strName;
1182 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1185 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1187 mapAddressBook.erase(address);
1190 return CWalletDB(strWalletFile).EraseName(address.ToString());
1194 void CWallet::PrintWallet(const CBlock& block)
1196 CRITICAL_BLOCK(cs_wallet)
1198 if (mapWallet.count(block.vtx[0].GetHash()))
1200 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1201 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1207 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1209 CRITICAL_BLOCK(cs_wallet)
1211 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1212 if (mi != mapWallet.end())
1221 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1225 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1228 vchDefaultKey = vchPubKey;
1232 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1234 if (!pwallet->fFileBacked)
1236 strWalletFileOut = pwallet->strWalletFile;
1240 bool CWallet::TopUpKeyPool()
1242 CRITICAL_BLOCK(cs_wallet)
1247 CWalletDB walletdb(strWalletFile);
1250 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1251 while (setKeyPool.size() < nTargetSize+1)
1254 if (!setKeyPool.empty())
1255 nEnd = *(--setKeyPool.end()) + 1;
1256 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1257 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1258 setKeyPool.insert(nEnd);
1259 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1265 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1268 keypool.vchPubKey.clear();
1269 CRITICAL_BLOCK(cs_wallet)
1274 // Get the oldest key
1275 if(setKeyPool.empty())
1278 CWalletDB walletdb(strWalletFile);
1280 nIndex = *(setKeyPool.begin());
1281 setKeyPool.erase(setKeyPool.begin());
1282 if (!walletdb.ReadPool(nIndex, keypool))
1283 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1284 if (!HaveKey(Hash160(keypool.vchPubKey)))
1285 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1286 assert(!keypool.vchPubKey.empty());
1287 printf("keypool reserve %"PRI64d"\n", nIndex);
1291 void CWallet::KeepKey(int64 nIndex)
1293 // Remove from key pool
1296 CWalletDB walletdb(strWalletFile);
1297 walletdb.ErasePool(nIndex);
1299 printf("keypool keep %"PRI64d"\n", nIndex);
1302 void CWallet::ReturnKey(int64 nIndex)
1304 // Return to key pool
1305 CRITICAL_BLOCK(cs_wallet)
1306 setKeyPool.insert(nIndex);
1307 printf("keypool return %"PRI64d"\n", nIndex);
1310 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1314 CRITICAL_BLOCK(cs_wallet)
1316 ReserveKeyFromKeyPool(nIndex, keypool);
1319 if (fAllowReuse && !vchDefaultKey.empty())
1321 result = vchDefaultKey;
1324 if (IsLocked()) return false;
1325 result = GenerateNewKey();
1329 result = keypool.vchPubKey;
1334 int64 CWallet::GetOldestKeyPoolTime()
1338 ReserveKeyFromKeyPool(nIndex, keypool);
1342 return keypool.nTime;
1345 vector<unsigned char> CReserveKey::GetReservedKey()
1350 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1352 vchPubKey = keypool.vchPubKey;
1355 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1356 vchPubKey = pwallet->vchDefaultKey;
1359 assert(!vchPubKey.empty());
1363 void CReserveKey::KeepKey()
1366 pwallet->KeepKey(nIndex);
1371 void CReserveKey::ReturnKey()
1374 pwallet->ReturnKey(nIndex);