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;
195 void CWallet::WalletUpdateSpent(const CTransaction &tx)
197 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
198 // Update the wallet spent flag if it doesn't know due to wallet.dat being
199 // restored from backup or the user making copies of wallet.dat.
200 CRITICAL_BLOCK(cs_wallet)
202 BOOST_FOREACH(const CTxIn& txin, tx.vin)
204 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
205 if (mi != mapWallet.end())
207 CWalletTx& wtx = (*mi).second;
208 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
210 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
211 wtx.MarkSpent(txin.prevout.n);
213 vWalletUpdated.push_back(txin.prevout.hash);
220 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
222 uint256 hash = wtxIn.GetHash();
223 CRITICAL_BLOCK(cs_wallet)
225 // Inserts only if not already there, returns tx inserted or tx found
226 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
227 CWalletTx& wtx = (*ret.first).second;
229 bool fInsertedNew = ret.second;
231 wtx.nTimeReceived = GetAdjustedTime();
233 bool fUpdated = false;
237 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
239 wtx.hashBlock = wtxIn.hashBlock;
242 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
244 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
245 wtx.nIndex = wtxIn.nIndex;
248 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
250 wtx.fFromMe = wtxIn.fFromMe;
253 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
257 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
260 if (fInsertedNew || fUpdated)
261 if (!wtx.WriteToDisk())
264 // If default receiving address gets used, replace it with a new one
265 CScript scriptDefaultKey;
266 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
267 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
269 if (txout.scriptPubKey == scriptDefaultKey)
271 std::vector<unsigned char> newDefaultKey;
272 if (GetKeyFromPool(newDefaultKey, false))
274 SetDefaultKey(newDefaultKey);
275 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
281 vWalletUpdated.push_back(hash);
283 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
284 WalletUpdateSpent(wtx);
292 // Add a transaction to the wallet, or update it.
293 // pblock is optional, but should be provided if the transaction is known to be in a block.
294 // If fUpdate is true, existing transactions will be updated.
295 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
297 uint256 hash = tx.GetHash();
298 CRITICAL_BLOCK(cs_wallet)
300 bool fExisted = mapWallet.count(hash);
301 if (fExisted && !fUpdate) return false;
302 if (fExisted || IsMine(tx) || IsFromMe(tx))
304 CWalletTx wtx(this,tx);
305 // Get merkle branch if transaction was found in a block
307 wtx.SetMerkleBranch(pblock);
308 return AddToWallet(wtx);
311 WalletUpdateSpent(tx);
316 bool CWallet::EraseFromWallet(uint256 hash)
320 CRITICAL_BLOCK(cs_wallet)
322 if (mapWallet.erase(hash))
323 CWalletDB(strWalletFile).EraseTx(hash);
329 bool CWallet::IsMine(const CTxIn &txin) const
331 CRITICAL_BLOCK(cs_wallet)
333 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
334 if (mi != mapWallet.end())
336 const CWalletTx& prev = (*mi).second;
337 if (txin.prevout.n < prev.vout.size())
338 if (IsMine(prev.vout[txin.prevout.n]))
345 int64 CWallet::GetDebit(const CTxIn &txin) const
347 CRITICAL_BLOCK(cs_wallet)
349 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
350 if (mi != mapWallet.end())
352 const CWalletTx& prev = (*mi).second;
353 if (txin.prevout.n < prev.vout.size())
354 if (IsMine(prev.vout[txin.prevout.n]))
355 return prev.vout[txin.prevout.n].nValue;
361 int64 CWalletTx::GetTxTime() const
363 return nTimeReceived;
366 int CWalletTx::GetRequestCount() const
368 // Returns -1 if it wasn't being tracked
370 CRITICAL_BLOCK(pwallet->cs_wallet)
377 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
378 if (mi != pwallet->mapRequestCount.end())
379 nRequests = (*mi).second;
384 // Did anyone request this transaction?
385 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
386 if (mi != pwallet->mapRequestCount.end())
388 nRequests = (*mi).second;
390 // How about the block it's in?
391 if (nRequests == 0 && hashBlock != 0)
393 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
394 if (mi != pwallet->mapRequestCount.end())
395 nRequests = (*mi).second;
397 nRequests = 1; // If it's in someone else's block it must have got out
405 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
406 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
408 nGeneratedImmature = nGeneratedMature = nFee = 0;
409 listReceived.clear();
411 strSentAccount = strFromAccount;
415 if (GetBlocksToMaturity() > 0)
416 nGeneratedImmature = pwallet->GetCredit(*this);
418 nGeneratedMature = GetCredit();
423 int64 nDebit = GetDebit();
424 if (nDebit > 0) // debit>0 means we signed/sent this transaction
426 int64 nValueOut = GetValueOut();
427 nFee = nDebit - nValueOut;
430 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
431 // but non-standard clients might (so return a list of address/amount pairs)
432 BOOST_FOREACH(const CTxOut& txout, vout)
434 CBitcoinAddress address;
435 vector<unsigned char> vchPubKey;
436 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
438 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
439 this->GetHash().ToString().c_str());
440 address = " unknown ";
443 // Don't report 'change' txouts
444 if (nDebit > 0 && pwallet->IsChange(txout))
448 listSent.push_back(make_pair(address, txout.nValue));
450 if (pwallet->IsMine(txout))
451 listReceived.push_back(make_pair(address, txout.nValue));
456 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
457 int64& nSent, int64& nFee) const
459 nGenerated = nReceived = nSent = nFee = 0;
461 int64 allGeneratedImmature, allGeneratedMature, allFee;
462 allGeneratedImmature = allGeneratedMature = allFee = 0;
463 string strSentAccount;
464 list<pair<CBitcoinAddress, int64> > listReceived;
465 list<pair<CBitcoinAddress, int64> > listSent;
466 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
468 if (strAccount == "")
469 nGenerated = allGeneratedMature;
470 if (strAccount == strSentAccount)
472 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
476 CRITICAL_BLOCK(pwallet->cs_wallet)
478 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
480 if (pwallet->mapAddressBook.count(r.first))
482 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
483 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
484 nReceived += r.second;
486 else if (strAccount.empty())
488 nReceived += r.second;
494 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
498 const int COPY_DEPTH = 3;
499 if (SetMerkleBranch() < COPY_DEPTH)
501 vector<uint256> vWorkQueue;
502 BOOST_FOREACH(const CTxIn& txin, vin)
503 vWorkQueue.push_back(txin.prevout.hash);
505 // This critsect is OK because txdb is already open
506 CRITICAL_BLOCK(pwallet->cs_wallet)
508 map<uint256, const CMerkleTx*> mapWalletPrev;
509 set<uint256> setAlreadyDone;
510 for (int i = 0; i < vWorkQueue.size(); i++)
512 uint256 hash = vWorkQueue[i];
513 if (setAlreadyDone.count(hash))
515 setAlreadyDone.insert(hash);
518 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
519 if (mi != pwallet->mapWallet.end())
522 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
523 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
525 else if (mapWalletPrev.count(hash))
527 tx = *mapWalletPrev[hash];
529 else if (!fClient && txdb.ReadDiskTx(hash, tx))
535 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
539 int nDepth = tx.SetMerkleBranch();
540 vtxPrev.push_back(tx);
542 if (nDepth < COPY_DEPTH)
543 BOOST_FOREACH(const CTxIn& txin, tx.vin)
544 vWorkQueue.push_back(txin.prevout.hash);
549 reverse(vtxPrev.begin(), vtxPrev.end());
552 bool CWalletTx::WriteToDisk()
554 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
557 // Scan the block chain (starting in pindexStart) for transactions
558 // from or to us. If fUpdate is true, found transactions that already
559 // exist in the wallet will be updated.
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();
737 int64 CWallet::GetUnconfirmedBalance() const
740 CRITICAL_BLOCK(cs_wallet)
742 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
744 const CWalletTx* pcoin = &(*it).second;
745 if (pcoin->IsFinal() && pcoin->IsConfirmed())
747 nTotal += pcoin->GetAvailableCredit();
753 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
758 // List of values less than target
759 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
760 coinLowestLarger.first = INT64_MAX;
761 coinLowestLarger.second.first = NULL;
762 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
763 int64 nTotalLower = 0;
765 CRITICAL_BLOCK(cs_wallet)
767 vector<const CWalletTx*> vCoins;
768 vCoins.reserve(mapWallet.size());
769 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
770 vCoins.push_back(&(*it).second);
771 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
773 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
775 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
778 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
781 int nDepth = pcoin->GetDepthInMainChain();
782 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
785 for (int i = 0; i < pcoin->vout.size(); i++)
787 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
790 int64 n = pcoin->vout[i].nValue;
795 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
797 if (n == nTargetValue)
799 setCoinsRet.insert(coin.second);
800 nValueRet += coin.first;
803 else if (n < nTargetValue + CENT)
805 vValue.push_back(coin);
808 else if (n < coinLowestLarger.first)
810 coinLowestLarger = coin;
816 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
818 for (int i = 0; i < vValue.size(); ++i)
820 setCoinsRet.insert(vValue[i].second);
821 nValueRet += vValue[i].first;
826 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
828 if (coinLowestLarger.second.first == NULL)
830 setCoinsRet.insert(coinLowestLarger.second);
831 nValueRet += coinLowestLarger.first;
835 if (nTotalLower >= nTargetValue + CENT)
836 nTargetValue += CENT;
838 // Solve subset sum by stochastic approximation
839 sort(vValue.rbegin(), vValue.rend());
840 vector<char> vfIncluded;
841 vector<char> vfBest(vValue.size(), true);
842 int64 nBest = nTotalLower;
844 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
846 vfIncluded.assign(vValue.size(), false);
848 bool fReachedTarget = false;
849 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
851 for (int i = 0; i < vValue.size(); i++)
853 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
855 nTotal += vValue[i].first;
856 vfIncluded[i] = true;
857 if (nTotal >= nTargetValue)
859 fReachedTarget = true;
865 nTotal -= vValue[i].first;
866 vfIncluded[i] = false;
873 // If the next larger is still closer, return it
874 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
876 setCoinsRet.insert(coinLowestLarger.second);
877 nValueRet += coinLowestLarger.first;
880 for (int i = 0; i < vValue.size(); i++)
883 setCoinsRet.insert(vValue[i].second);
884 nValueRet += vValue[i].first;
888 printf("SelectCoins() best subset: ");
889 for (int i = 0; i < vValue.size(); i++)
891 printf("%s ", FormatMoney(vValue[i].first).c_str());
892 printf("total %s\n", FormatMoney(nBest).c_str());
898 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
900 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
901 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
902 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
908 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
911 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
917 if (vecSend.empty() || nValue < 0)
920 wtxNew.pwallet = this;
922 CRITICAL_BLOCK(cs_main)
923 CRITICAL_BLOCK(cs_wallet)
925 // txdb must be opened before the mapWallet lock
928 nFeeRet = nTransactionFee;
933 wtxNew.fFromMe = true;
935 int64 nTotalValue = nValue + nFeeRet;
936 double dPriority = 0;
937 // vouts to the payees
938 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
939 wtxNew.vout.push_back(CTxOut(s.second, s.first));
941 // Choose coins to use
942 set<pair<const CWalletTx*,unsigned int> > setCoins;
944 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
946 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
948 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
949 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
952 int64 nChange = nValueIn - nValue - nFeeRet;
953 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
954 // or until nChange becomes zero
955 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
957 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
958 nChange -= nMoveToFee;
959 nFeeRet += nMoveToFee;
964 // Note: We use a new key here to keep it from being obvious which side is the change.
965 // The drawback is that by not reusing a previous key, the change may be lost if a
966 // backup is restored, if the backup doesn't have the new private key for the change.
967 // If we reused the old key, it would be possible to add code to look for and
968 // rediscover unknown transactions that were written with keys of ours to recover
969 // post-backup change.
971 // Reserve a new key pair from key pool
972 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
973 // assert(mapKeys.count(vchPubKey));
975 // Fill a vout to ourself, using same address type as the payment
976 CScript scriptChange;
977 if (vecSend[0].first.GetBitcoinAddress().IsValid())
978 scriptChange.SetBitcoinAddress(vchPubKey);
980 scriptChange << vchPubKey << OP_CHECKSIG;
982 // Insert change txn at random position:
983 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
984 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
987 reservekey.ReturnKey();
990 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
991 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
995 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
996 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1000 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1001 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1003 dPriority /= nBytes;
1005 // Check that enough fee is included
1006 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1007 bool fAllowFree = CTransaction::AllowFree(dPriority);
1008 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1009 if (nFeeRet < max(nPayFee, nMinFee))
1011 nFeeRet = max(nPayFee, nMinFee);
1015 // Fill vtxPrev by copying from previous transactions vtxPrev
1016 wtxNew.AddSupportingTransactions(txdb);
1017 wtxNew.fTimeReceivedIsTxTime = true;
1026 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1028 vector< pair<CScript, int64> > vecSend;
1029 vecSend.push_back(make_pair(scriptPubKey, nValue));
1030 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1033 // Call after CreateTransaction unless you want to abort
1034 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1036 CRITICAL_BLOCK(cs_main)
1037 CRITICAL_BLOCK(cs_wallet)
1039 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1041 // This is only to keep the database open to defeat the auto-flush for the
1042 // duration of this scope. This is the only place where this optimization
1043 // maybe makes sense; please don't do it anywhere else.
1044 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1046 // Take key pair from key pool so it won't be used again
1047 reservekey.KeepKey();
1049 // Add tx to wallet, because if it has change it's also ours,
1050 // otherwise just for transaction history.
1051 AddToWallet(wtxNew);
1053 // Mark old coins as spent
1054 set<CWalletTx*> setCoins;
1055 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1057 CWalletTx &coin = mapWallet[txin.prevout.hash];
1058 coin.pwallet = this;
1059 coin.MarkSpent(txin.prevout.n);
1061 vWalletUpdated.push_back(coin.GetHash());
1068 // Track how many getdata requests our transaction gets
1069 mapRequestCount[wtxNew.GetHash()] = 0;
1072 if (!wtxNew.AcceptToMemoryPool())
1074 // This must not fail. The transaction has already been signed and recorded.
1075 printf("CommitTransaction() : Error: Transaction not valid");
1078 wtxNew.RelayWalletTransaction();
1087 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1089 CReserveKey reservekey(this);
1094 string strError = _("Error: Wallet locked, unable to create transaction ");
1095 printf("SendMoney() : %s", strError.c_str());
1098 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1101 if (nValue + nFeeRequired > GetBalance())
1102 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());
1104 strError = _("Error: Transaction creation failed ");
1105 printf("SendMoney() : %s", strError.c_str());
1109 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1112 if (!CommitTransaction(wtxNew, reservekey))
1113 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.");
1121 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1125 return _("Invalid amount");
1126 if (nValue + nTransactionFee > GetBalance())
1127 return _("Insufficient funds");
1129 // Parse bitcoin address
1130 CScript scriptPubKey;
1131 scriptPubKey.SetBitcoinAddress(address);
1133 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1139 int CWallet::LoadWallet(bool& fFirstRunRet)
1143 fFirstRunRet = false;
1144 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1145 if (nLoadWalletRet != DB_LOAD_OK)
1146 return nLoadWalletRet;
1147 fFirstRunRet = vchDefaultKey.empty();
1149 if (!HaveKey(Hash160(vchDefaultKey)))
1151 // Create new keyUser and set as default key
1152 RandAddSeedPerfmon();
1154 std::vector<unsigned char> newDefaultKey;
1155 if (!GetKeyFromPool(newDefaultKey, false))
1156 return DB_LOAD_FAIL;
1157 SetDefaultKey(newDefaultKey);
1158 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1159 return DB_LOAD_FAIL;
1162 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1167 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1169 mapAddressBook[address] = strName;
1172 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1175 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1177 mapAddressBook.erase(address);
1180 return CWalletDB(strWalletFile).EraseName(address.ToString());
1184 void CWallet::PrintWallet(const CBlock& block)
1186 CRITICAL_BLOCK(cs_wallet)
1188 if (mapWallet.count(block.vtx[0].GetHash()))
1190 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1191 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1197 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1199 CRITICAL_BLOCK(cs_wallet)
1201 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1202 if (mi != mapWallet.end())
1211 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1215 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1218 vchDefaultKey = vchPubKey;
1222 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1224 if (!pwallet->fFileBacked)
1226 strWalletFileOut = pwallet->strWalletFile;
1230 bool CWallet::TopUpKeyPool()
1232 CRITICAL_BLOCK(cs_wallet)
1237 CWalletDB walletdb(strWalletFile);
1240 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1241 while (setKeyPool.size() < nTargetSize+1)
1244 if (!setKeyPool.empty())
1245 nEnd = *(--setKeyPool.end()) + 1;
1246 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1247 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1248 setKeyPool.insert(nEnd);
1249 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1255 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1258 keypool.vchPubKey.clear();
1259 CRITICAL_BLOCK(cs_wallet)
1264 // Get the oldest key
1265 if(setKeyPool.empty())
1268 CWalletDB walletdb(strWalletFile);
1270 nIndex = *(setKeyPool.begin());
1271 setKeyPool.erase(setKeyPool.begin());
1272 if (!walletdb.ReadPool(nIndex, keypool))
1273 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1274 if (!HaveKey(Hash160(keypool.vchPubKey)))
1275 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1276 assert(!keypool.vchPubKey.empty());
1277 printf("keypool reserve %"PRI64d"\n", nIndex);
1281 void CWallet::KeepKey(int64 nIndex)
1283 // Remove from key pool
1286 CWalletDB walletdb(strWalletFile);
1287 walletdb.ErasePool(nIndex);
1289 printf("keypool keep %"PRI64d"\n", nIndex);
1292 void CWallet::ReturnKey(int64 nIndex)
1294 // Return to key pool
1295 CRITICAL_BLOCK(cs_wallet)
1296 setKeyPool.insert(nIndex);
1297 printf("keypool return %"PRI64d"\n", nIndex);
1300 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1304 CRITICAL_BLOCK(cs_wallet)
1306 ReserveKeyFromKeyPool(nIndex, keypool);
1309 if (fAllowReuse && !vchDefaultKey.empty())
1311 result = vchDefaultKey;
1314 if (IsLocked()) return false;
1315 result = GenerateNewKey();
1319 result = keypool.vchPubKey;
1324 int64 CWallet::GetOldestKeyPoolTime()
1328 ReserveKeyFromKeyPool(nIndex, keypool);
1332 return keypool.nTime;
1335 vector<unsigned char> CReserveKey::GetReservedKey()
1340 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1342 vchPubKey = keypool.vchPubKey;
1345 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1346 vchPubKey = pwallet->vchDefaultKey;
1349 assert(!vchPubKey.empty());
1353 void CReserveKey::KeepKey()
1356 pwallet->KeepKey(nIndex);
1361 void CReserveKey::ReturnKey()
1364 pwallet->ReturnKey(nIndex);