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);
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 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
294 uint256 hash = tx.GetHash();
295 CRITICAL_BLOCK(cs_wallet)
297 bool fExisted = mapWallet.count(hash);
298 if (fExisted && !fUpdate) return false;
299 if (fExisted || IsMine(tx) || IsFromMe(tx))
301 CWalletTx wtx(this,tx);
302 // Get merkle branch if transaction was found in a block
304 wtx.SetMerkleBranch(pblock);
305 return AddToWallet(wtx);
308 WalletUpdateSpent(tx);
313 bool CWallet::EraseFromWallet(uint256 hash)
317 CRITICAL_BLOCK(cs_wallet)
319 if (mapWallet.erase(hash))
320 CWalletDB(strWalletFile).EraseTx(hash);
326 bool CWallet::IsMine(const CTxIn &txin) const
328 CRITICAL_BLOCK(cs_wallet)
330 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
331 if (mi != mapWallet.end())
333 const CWalletTx& prev = (*mi).second;
334 if (txin.prevout.n < prev.vout.size())
335 if (IsMine(prev.vout[txin.prevout.n]))
342 int64 CWallet::GetDebit(const CTxIn &txin) const
344 CRITICAL_BLOCK(cs_wallet)
346 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
347 if (mi != mapWallet.end())
349 const CWalletTx& prev = (*mi).second;
350 if (txin.prevout.n < prev.vout.size())
351 if (IsMine(prev.vout[txin.prevout.n]))
352 return prev.vout[txin.prevout.n].nValue;
358 int64 CWalletTx::GetTxTime() const
360 return nTimeReceived;
363 int CWalletTx::GetRequestCount() const
365 // Returns -1 if it wasn't being tracked
367 CRITICAL_BLOCK(pwallet->cs_wallet)
374 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
375 if (mi != pwallet->mapRequestCount.end())
376 nRequests = (*mi).second;
381 // Did anyone request this transaction?
382 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
383 if (mi != pwallet->mapRequestCount.end())
385 nRequests = (*mi).second;
387 // How about the block it's in?
388 if (nRequests == 0 && hashBlock != 0)
390 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
391 if (mi != pwallet->mapRequestCount.end())
392 nRequests = (*mi).second;
394 nRequests = 1; // If it's in someone else's block it must have got out
402 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
403 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
405 nGeneratedImmature = nGeneratedMature = nFee = 0;
406 listReceived.clear();
408 strSentAccount = strFromAccount;
412 if (GetBlocksToMaturity() > 0)
413 nGeneratedImmature = pwallet->GetCredit(*this);
415 nGeneratedMature = GetCredit();
420 int64 nDebit = GetDebit();
421 if (nDebit > 0) // debit>0 means we signed/sent this transaction
423 int64 nValueOut = GetValueOut();
424 nFee = nDebit - nValueOut;
427 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
428 // but non-standard clients might (so return a list of address/amount pairs)
429 BOOST_FOREACH(const CTxOut& txout, vout)
431 CBitcoinAddress address;
432 vector<unsigned char> vchPubKey;
433 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
435 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
436 this->GetHash().ToString().c_str());
437 address = " unknown ";
440 // Don't report 'change' txouts
441 if (nDebit > 0 && pwallet->IsChange(txout))
445 listSent.push_back(make_pair(address, txout.nValue));
447 if (pwallet->IsMine(txout))
448 listReceived.push_back(make_pair(address, txout.nValue));
453 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
454 int64& nSent, int64& nFee) const
456 nGenerated = nReceived = nSent = nFee = 0;
458 int64 allGeneratedImmature, allGeneratedMature, allFee;
459 allGeneratedImmature = allGeneratedMature = allFee = 0;
460 string strSentAccount;
461 list<pair<CBitcoinAddress, int64> > listReceived;
462 list<pair<CBitcoinAddress, int64> > listSent;
463 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
465 if (strAccount == "")
466 nGenerated = allGeneratedMature;
467 if (strAccount == strSentAccount)
469 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
473 CRITICAL_BLOCK(pwallet->cs_wallet)
475 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
477 if (pwallet->mapAddressBook.count(r.first))
479 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
480 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
481 nReceived += r.second;
483 else if (strAccount.empty())
485 nReceived += r.second;
491 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
495 const int COPY_DEPTH = 3;
496 if (SetMerkleBranch() < COPY_DEPTH)
498 vector<uint256> vWorkQueue;
499 BOOST_FOREACH(const CTxIn& txin, vin)
500 vWorkQueue.push_back(txin.prevout.hash);
502 // This critsect is OK because txdb is already open
503 CRITICAL_BLOCK(pwallet->cs_wallet)
505 map<uint256, const CMerkleTx*> mapWalletPrev;
506 set<uint256> setAlreadyDone;
507 for (int i = 0; i < vWorkQueue.size(); i++)
509 uint256 hash = vWorkQueue[i];
510 if (setAlreadyDone.count(hash))
512 setAlreadyDone.insert(hash);
515 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
516 if (mi != pwallet->mapWallet.end())
519 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
520 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
522 else if (mapWalletPrev.count(hash))
524 tx = *mapWalletPrev[hash];
526 else if (!fClient && txdb.ReadDiskTx(hash, tx))
532 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
536 int nDepth = tx.SetMerkleBranch();
537 vtxPrev.push_back(tx);
539 if (nDepth < COPY_DEPTH)
540 BOOST_FOREACH(const CTxIn& txin, tx.vin)
541 vWorkQueue.push_back(txin.prevout.hash);
546 reverse(vtxPrev.begin(), vtxPrev.end());
549 bool CWalletTx::WriteToDisk()
551 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
554 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
558 CBlockIndex* pindex = pindexStart;
559 CRITICAL_BLOCK(cs_wallet)
564 block.ReadFromDisk(pindex, true);
565 BOOST_FOREACH(CTransaction& tx, block.vtx)
567 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
570 pindex = pindex->pnext;
576 void CWallet::ReacceptWalletTransactions()
580 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
583 vector<CDiskTxPos> vMissingTx;
584 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
586 CWalletTx& wtx = item.second;
587 if (wtx.IsCoinBase() && wtx.IsSpent(0))
591 bool fUpdated = false;
592 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
594 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
595 if (txindex.vSpent.size() != wtx.vout.size())
597 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
600 for (int i = 0; i < txindex.vSpent.size(); i++)
604 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
608 vMissingTx.push_back(txindex.vSpent[i]);
613 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
620 // Reaccept any txes of ours that aren't already in a block
621 if (!wtx.IsCoinBase())
622 wtx.AcceptWalletTransaction(txdb, false);
625 if (!vMissingTx.empty())
627 // TODO: optimize this to scan just part of the block chain?
628 if (ScanForWalletTransactions(pindexGenesisBlock))
629 fRepeat = true; // Found missing transactions: re-do Reaccept.
634 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
636 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
638 if (!tx.IsCoinBase())
640 uint256 hash = tx.GetHash();
641 if (!txdb.ContainsTx(hash))
642 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
647 uint256 hash = GetHash();
648 if (!txdb.ContainsTx(hash))
650 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
651 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
656 void CWalletTx::RelayWalletTransaction()
659 RelayWalletTransaction(txdb);
662 void CWallet::ResendWalletTransactions()
664 // Do this infrequently and randomly to avoid giving away
665 // that these are our transactions.
666 static int64 nNextTime;
667 if (GetTime() < nNextTime)
669 bool fFirst = (nNextTime == 0);
670 nNextTime = GetTime() + GetRand(30 * 60);
674 // Only do it if there's been a new block since last time
675 static int64 nLastTime;
676 if (nTimeBestReceived < nLastTime)
678 nLastTime = GetTime();
680 // Rebroadcast any of our txes that aren't in a block yet
681 printf("ResendWalletTransactions()\n");
683 CRITICAL_BLOCK(cs_wallet)
685 // Sort them in chronological order
686 multimap<unsigned int, CWalletTx*> mapSorted;
687 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
689 CWalletTx& wtx = item.second;
690 // Don't rebroadcast until it's had plenty of time that
691 // it should have gotten in already by now.
692 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
693 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
695 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
697 CWalletTx& wtx = *item.second;
698 wtx.RelayWalletTransaction(txdb);
708 //////////////////////////////////////////////////////////////////////////////
714 int64 CWallet::GetBalance() const
717 CRITICAL_BLOCK(cs_wallet)
719 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
721 const CWalletTx* pcoin = &(*it).second;
722 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
724 nTotal += pcoin->GetAvailableCredit();
731 int64 CWallet::GetUnconfirmedBalance() const
734 CRITICAL_BLOCK(cs_mapWallet)
736 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
738 const CWalletTx* pcoin = &(*it).second;
739 if (pcoin->IsFinal() && pcoin->IsConfirmed())
741 nTotal += pcoin->GetAvailableCredit();
747 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
752 // List of values less than target
753 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
754 coinLowestLarger.first = INT64_MAX;
755 coinLowestLarger.second.first = NULL;
756 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
757 int64 nTotalLower = 0;
759 CRITICAL_BLOCK(cs_wallet)
761 vector<const CWalletTx*> vCoins;
762 vCoins.reserve(mapWallet.size());
763 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
764 vCoins.push_back(&(*it).second);
765 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
767 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
769 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
772 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
775 int nDepth = pcoin->GetDepthInMainChain();
776 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
779 for (int i = 0; i < pcoin->vout.size(); i++)
781 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
784 int64 n = pcoin->vout[i].nValue;
789 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
791 if (n == nTargetValue)
793 setCoinsRet.insert(coin.second);
794 nValueRet += coin.first;
797 else if (n < nTargetValue + CENT)
799 vValue.push_back(coin);
802 else if (n < coinLowestLarger.first)
804 coinLowestLarger = coin;
810 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
812 for (int i = 0; i < vValue.size(); ++i)
814 setCoinsRet.insert(vValue[i].second);
815 nValueRet += vValue[i].first;
820 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
822 if (coinLowestLarger.second.first == NULL)
824 setCoinsRet.insert(coinLowestLarger.second);
825 nValueRet += coinLowestLarger.first;
829 if (nTotalLower >= nTargetValue + CENT)
830 nTargetValue += CENT;
832 // Solve subset sum by stochastic approximation
833 sort(vValue.rbegin(), vValue.rend());
834 vector<char> vfIncluded;
835 vector<char> vfBest(vValue.size(), true);
836 int64 nBest = nTotalLower;
838 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
840 vfIncluded.assign(vValue.size(), false);
842 bool fReachedTarget = false;
843 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
845 for (int i = 0; i < vValue.size(); i++)
847 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
849 nTotal += vValue[i].first;
850 vfIncluded[i] = true;
851 if (nTotal >= nTargetValue)
853 fReachedTarget = true;
859 nTotal -= vValue[i].first;
860 vfIncluded[i] = false;
867 // If the next larger is still closer, return it
868 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
870 setCoinsRet.insert(coinLowestLarger.second);
871 nValueRet += coinLowestLarger.first;
874 for (int i = 0; i < vValue.size(); i++)
877 setCoinsRet.insert(vValue[i].second);
878 nValueRet += vValue[i].first;
882 printf("SelectCoins() best subset: ");
883 for (int i = 0; i < vValue.size(); i++)
885 printf("%s ", FormatMoney(vValue[i].first).c_str());
886 printf("total %s\n", FormatMoney(nBest).c_str());
892 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
894 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
895 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
896 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
902 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
905 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
911 if (vecSend.empty() || nValue < 0)
914 wtxNew.pwallet = this;
916 CRITICAL_BLOCK(cs_main)
917 CRITICAL_BLOCK(cs_wallet)
919 // txdb must be opened before the mapWallet lock
922 nFeeRet = nTransactionFee;
927 wtxNew.fFromMe = true;
929 int64 nTotalValue = nValue + nFeeRet;
930 double dPriority = 0;
931 // vouts to the payees
932 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
933 wtxNew.vout.push_back(CTxOut(s.second, s.first));
935 // Choose coins to use
936 set<pair<const CWalletTx*,unsigned int> > setCoins;
938 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
940 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
942 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
943 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
946 int64 nChange = nValueIn - nValue - nFeeRet;
947 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
948 // or until nChange becomes zero
949 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
951 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
952 nChange -= nMoveToFee;
953 nFeeRet += nMoveToFee;
958 // Note: We use a new key here to keep it from being obvious which side is the change.
959 // The drawback is that by not reusing a previous key, the change may be lost if a
960 // backup is restored, if the backup doesn't have the new private key for the change.
961 // If we reused the old key, it would be possible to add code to look for and
962 // rediscover unknown transactions that were written with keys of ours to recover
963 // post-backup change.
965 // Reserve a new key pair from key pool
966 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
967 // assert(mapKeys.count(vchPubKey));
969 // Fill a vout to ourself, using same address type as the payment
970 CScript scriptChange;
971 if (vecSend[0].first.GetBitcoinAddress().IsValid())
972 scriptChange.SetBitcoinAddress(vchPubKey);
974 scriptChange << vchPubKey << OP_CHECKSIG;
976 // Insert change txn at random position:
977 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
978 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
981 reservekey.ReturnKey();
984 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
985 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
989 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
990 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
994 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
995 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
999 // Check that enough fee is included
1000 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1001 bool fAllowFree = CTransaction::AllowFree(dPriority);
1002 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1003 if (nFeeRet < max(nPayFee, nMinFee))
1005 nFeeRet = max(nPayFee, nMinFee);
1009 // Fill vtxPrev by copying from previous transactions vtxPrev
1010 wtxNew.AddSupportingTransactions(txdb);
1011 wtxNew.fTimeReceivedIsTxTime = true;
1020 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1022 vector< pair<CScript, int64> > vecSend;
1023 vecSend.push_back(make_pair(scriptPubKey, nValue));
1024 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1027 // Call after CreateTransaction unless you want to abort
1028 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1030 CRITICAL_BLOCK(cs_main)
1031 CRITICAL_BLOCK(cs_wallet)
1033 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1035 // This is only to keep the database open to defeat the auto-flush for the
1036 // duration of this scope. This is the only place where this optimization
1037 // maybe makes sense; please don't do it anywhere else.
1038 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1040 // Take key pair from key pool so it won't be used again
1041 reservekey.KeepKey();
1043 // Add tx to wallet, because if it has change it's also ours,
1044 // otherwise just for transaction history.
1045 AddToWallet(wtxNew);
1047 // Mark old coins as spent
1048 set<CWalletTx*> setCoins;
1049 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1051 CWalletTx &coin = mapWallet[txin.prevout.hash];
1052 coin.pwallet = this;
1053 coin.MarkSpent(txin.prevout.n);
1055 vWalletUpdated.push_back(coin.GetHash());
1062 // Track how many getdata requests our transaction gets
1063 mapRequestCount[wtxNew.GetHash()] = 0;
1066 if (!wtxNew.AcceptToMemoryPool())
1068 // This must not fail. The transaction has already been signed and recorded.
1069 printf("CommitTransaction() : Error: Transaction not valid");
1072 wtxNew.RelayWalletTransaction();
1081 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1083 CReserveKey reservekey(this);
1088 string strError = _("Error: Wallet locked, unable to create transaction ");
1089 printf("SendMoney() : %s", strError.c_str());
1092 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1095 if (nValue + nFeeRequired > GetBalance())
1096 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());
1098 strError = _("Error: Transaction creation failed ");
1099 printf("SendMoney() : %s", strError.c_str());
1103 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1106 if (!CommitTransaction(wtxNew, reservekey))
1107 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.");
1115 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1119 return _("Invalid amount");
1120 if (nValue + nTransactionFee > GetBalance())
1121 return _("Insufficient funds");
1123 // Parse bitcoin address
1124 CScript scriptPubKey;
1125 scriptPubKey.SetBitcoinAddress(address);
1127 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1133 int CWallet::LoadWallet(bool& fFirstRunRet)
1137 fFirstRunRet = false;
1138 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1139 if (nLoadWalletRet != DB_LOAD_OK)
1140 return nLoadWalletRet;
1141 fFirstRunRet = vchDefaultKey.empty();
1143 if (!HaveKey(Hash160(vchDefaultKey)))
1145 // Create new keyUser and set as default key
1146 RandAddSeedPerfmon();
1148 std::vector<unsigned char> newDefaultKey;
1149 if (!GetKeyFromPool(newDefaultKey, false))
1150 return DB_LOAD_FAIL;
1151 SetDefaultKey(newDefaultKey);
1152 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1153 return DB_LOAD_FAIL;
1156 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1161 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1163 mapAddressBook[address] = strName;
1166 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1169 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1171 mapAddressBook.erase(address);
1174 return CWalletDB(strWalletFile).EraseName(address.ToString());
1178 void CWallet::PrintWallet(const CBlock& block)
1180 CRITICAL_BLOCK(cs_wallet)
1182 if (mapWallet.count(block.vtx[0].GetHash()))
1184 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1185 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1191 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1193 CRITICAL_BLOCK(cs_wallet)
1195 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1196 if (mi != mapWallet.end())
1205 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1209 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1212 vchDefaultKey = vchPubKey;
1216 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1218 if (!pwallet->fFileBacked)
1220 strWalletFileOut = pwallet->strWalletFile;
1224 bool CWallet::TopUpKeyPool()
1226 CRITICAL_BLOCK(cs_wallet)
1231 CWalletDB walletdb(strWalletFile);
1234 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1235 while (setKeyPool.size() < nTargetSize+1)
1238 if (!setKeyPool.empty())
1239 nEnd = *(--setKeyPool.end()) + 1;
1240 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1241 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1242 setKeyPool.insert(nEnd);
1243 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1249 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1252 keypool.vchPubKey.clear();
1253 CRITICAL_BLOCK(cs_wallet)
1258 // Get the oldest key
1259 if(setKeyPool.empty())
1262 CWalletDB walletdb(strWalletFile);
1264 nIndex = *(setKeyPool.begin());
1265 setKeyPool.erase(setKeyPool.begin());
1266 if (!walletdb.ReadPool(nIndex, keypool))
1267 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1268 if (!HaveKey(Hash160(keypool.vchPubKey)))
1269 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1270 assert(!keypool.vchPubKey.empty());
1271 printf("keypool reserve %"PRI64d"\n", nIndex);
1275 void CWallet::KeepKey(int64 nIndex)
1277 // Remove from key pool
1280 CWalletDB walletdb(strWalletFile);
1281 walletdb.ErasePool(nIndex);
1283 printf("keypool keep %"PRI64d"\n", nIndex);
1286 void CWallet::ReturnKey(int64 nIndex)
1288 // Return to key pool
1289 CRITICAL_BLOCK(cs_wallet)
1290 setKeyPool.insert(nIndex);
1291 printf("keypool return %"PRI64d"\n", nIndex);
1294 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1298 CRITICAL_BLOCK(cs_wallet)
1300 ReserveKeyFromKeyPool(nIndex, keypool);
1303 if (fAllowReuse && !vchDefaultKey.empty())
1305 result = vchDefaultKey;
1308 if (IsLocked()) return false;
1309 result = GenerateNewKey();
1313 result = keypool.vchPubKey;
1318 int64 CWallet::GetOldestKeyPoolTime()
1322 ReserveKeyFromKeyPool(nIndex, keypool);
1326 return keypool.nTime;
1329 vector<unsigned char> CReserveKey::GetReservedKey()
1334 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1336 vchPubKey = keypool.vchPubKey;
1339 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1340 vchPubKey = pwallet->vchDefaultKey;
1343 assert(!vchPubKey.empty());
1347 void CReserveKey::KeepKey()
1350 pwallet->KeepKey(nIndex);
1355 void CReserveKey::ReturnKey()
1358 pwallet->ReturnKey(nIndex);