1 // Copyright (c) 2009-2011 Satoshi Nakamoto & Bitcoin developers
2 // Distributed under the MIT/X11 software license, see the accompanying
3 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
7 #include "cryptopp/sha.h"
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_pwalletdbEncryption)
37 if (pwalletdbEncryption)
38 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
40 return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
44 bool CWallet::Unlock(const string& strWalletPassphrase)
46 CRITICAL_BLOCK(cs_vMasterKey)
52 CKeyingMaterial vMasterKey;
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))
67 bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const string& strNewWalletPassphrase)
69 CRITICAL_BLOCK(cs_vMasterKey)
71 bool fWasLocked = IsLocked();
76 CKeyingMaterial vMasterKey;
77 BOOST_FOREACH(MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
79 if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
81 if(!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
83 if (CCryptoKeyStore::Unlock(vMasterKey))
85 int64 nStartTime = GetTimeMillis();
86 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
87 pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
89 nStartTime = GetTimeMillis();
90 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
91 pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
93 if (pMasterKey.second.nDeriveIterations < 25000)
94 pMasterKey.second.nDeriveIterations = 25000;
96 printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
98 if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
100 if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey))
102 CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
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)
127 CRITICAL_BLOCK(cs_KeyStore)
128 CRITICAL_BLOCK(cs_vMasterKey)
129 CRITICAL_BLOCK(cs_pwalletdbEncryption)
134 CKeyingMaterial vMasterKey;
135 RandAddSeedPerfmon();
137 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
138 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
140 CMasterKey kMasterKey;
142 RandAddSeedPerfmon();
143 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
144 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
147 int64 nStartTime = GetTimeMillis();
148 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
149 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
151 nStartTime = GetTimeMillis();
152 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
153 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
155 if (kMasterKey.nDeriveIterations < 25000)
156 kMasterKey.nDeriveIterations = 25000;
158 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
160 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
162 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
165 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
168 pwalletdbEncryption = new CWalletDB(strWalletFile);
169 pwalletdbEncryption->TxnBegin();
170 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
173 if (!EncryptKeys(vMasterKey))
176 pwalletdbEncryption->TxnAbort();
177 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.
182 CCorruptAddress corruptAddress;
183 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
184 if (!pwalletdbEncryption->TxnCommit())
185 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.
187 pwalletdbEncryption->Close();
188 pwalletdbEncryption = NULL;
196 void CWallet::WalletUpdateSpent(const CTransaction &tx)
198 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
199 // Update the wallet spent flag if it doesn't know due to wallet.dat being
200 // restored from backup or the user making copies of wallet.dat.
201 CRITICAL_BLOCK(cs_mapWallet)
203 BOOST_FOREACH(const CTxIn& txin, tx.vin)
205 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
206 if (mi != mapWallet.end())
208 CWalletTx& wtx = (*mi).second;
209 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
211 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
212 wtx.MarkSpent(txin.prevout.n);
214 vWalletUpdated.push_back(txin.prevout.hash);
221 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
223 uint256 hash = wtxIn.GetHash();
224 CRITICAL_BLOCK(cs_mapWallet)
226 // Inserts only if not already there, returns tx inserted or tx found
227 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
228 CWalletTx& wtx = (*ret.first).second;
230 bool fInsertedNew = ret.second;
232 wtx.nTimeReceived = GetAdjustedTime();
234 bool fUpdated = false;
238 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
240 wtx.hashBlock = wtxIn.hashBlock;
243 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
245 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
246 wtx.nIndex = wtxIn.nIndex;
249 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
251 wtx.fFromMe = wtxIn.fFromMe;
254 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
258 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
261 if (fInsertedNew || fUpdated)
262 if (!wtx.WriteToDisk())
265 // If default receiving address gets used, replace it with a new one
266 CScript scriptDefaultKey;
267 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
268 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
270 if (txout.scriptPubKey == scriptDefaultKey)
272 SetDefaultKey(GetOrReuseKeyFromPool());
273 SetAddressBookName(PubKeyToAddress(vchDefaultKey), "");
278 vWalletUpdated.push_back(hash);
280 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
281 WalletUpdateSpent(wtx);
289 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
291 uint256 hash = tx.GetHash();
292 bool fExisted = mapWallet.count(hash);
293 if (fExisted && !fUpdate) return false;
294 if (fExisted || IsMine(tx) || IsFromMe(tx))
296 CWalletTx wtx(this,tx);
297 // Get merkle branch if transaction was found in a block
299 wtx.SetMerkleBranch(pblock);
300 return AddToWallet(wtx);
303 WalletUpdateSpent(tx);
307 bool CWallet::EraseFromWallet(uint256 hash)
311 CRITICAL_BLOCK(cs_mapWallet)
313 if (mapWallet.erase(hash))
314 CWalletDB(strWalletFile).EraseTx(hash);
320 bool CWallet::IsMine(const CTxIn &txin) const
322 CRITICAL_BLOCK(cs_mapWallet)
324 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
325 if (mi != mapWallet.end())
327 const CWalletTx& prev = (*mi).second;
328 if (txin.prevout.n < prev.vout.size())
329 if (IsMine(prev.vout[txin.prevout.n]))
336 int64 CWallet::GetDebit(const CTxIn &txin) const
338 CRITICAL_BLOCK(cs_mapWallet)
340 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
341 if (mi != mapWallet.end())
343 const CWalletTx& prev = (*mi).second;
344 if (txin.prevout.n < prev.vout.size())
345 if (IsMine(prev.vout[txin.prevout.n]))
346 return prev.vout[txin.prevout.n].nValue;
352 int64 CWalletTx::GetTxTime() const
354 if (!fTimeReceivedIsTxTime && hashBlock != 0)
356 // If we did not receive the transaction directly, we rely on the block's
357 // time to figure out when it happened. We use the median over a range
358 // of blocks to try to filter out inaccurate block times.
359 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
360 if (mi != mapBlockIndex.end())
362 CBlockIndex* pindex = (*mi).second;
364 return pindex->GetMedianTime();
367 return nTimeReceived;
370 int CWalletTx::GetRequestCount() const
372 // Returns -1 if it wasn't being tracked
374 CRITICAL_BLOCK(pwallet->cs_mapRequestCount)
381 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
382 if (mi != pwallet->mapRequestCount.end())
383 nRequests = (*mi).second;
388 // Did anyone request this transaction?
389 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
390 if (mi != pwallet->mapRequestCount.end())
392 nRequests = (*mi).second;
394 // How about the block it's in?
395 if (nRequests == 0 && hashBlock != 0)
397 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
398 if (mi != pwallet->mapRequestCount.end())
399 nRequests = (*mi).second;
401 nRequests = 1; // If it's in someone else's block it must have got out
409 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<string, int64> >& listReceived,
410 list<pair<string, int64> >& listSent, int64& nFee, string& strSentAccount) const
412 nGeneratedImmature = nGeneratedMature = nFee = 0;
413 listReceived.clear();
415 strSentAccount = strFromAccount;
419 if (GetBlocksToMaturity() > 0)
420 nGeneratedImmature = pwallet->GetCredit(*this);
422 nGeneratedMature = GetCredit();
427 int64 nDebit = GetDebit();
428 if (nDebit > 0) // debit>0 means we signed/sent this transaction
430 int64 nValueOut = GetValueOut();
431 nFee = nDebit - nValueOut;
434 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
435 // but non-standard clients might (so return a list of address/amount pairs)
436 BOOST_FOREACH(const CTxOut& txout, vout)
440 vector<unsigned char> vchPubKey;
441 if (ExtractHash160(txout.scriptPubKey, pwallet, hash160))
442 address = Hash160ToAddress(hash160);
445 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
446 this->GetHash().ToString().c_str());
447 address = " unknown ";
450 // Don't report 'change' txouts
451 if (nDebit > 0 && pwallet->IsChange(txout))
455 listSent.push_back(make_pair(address, txout.nValue));
457 if (pwallet->IsMine(txout))
458 listReceived.push_back(make_pair(address, txout.nValue));
463 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
464 int64& nSent, int64& nFee) const
466 nGenerated = nReceived = nSent = nFee = 0;
468 int64 allGeneratedImmature, allGeneratedMature, allFee;
469 allGeneratedImmature = allGeneratedMature = allFee = 0;
470 string strSentAccount;
471 list<pair<string, int64> > listReceived;
472 list<pair<string, int64> > listSent;
473 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
475 if (strAccount == "")
476 nGenerated = allGeneratedMature;
477 if (strAccount == strSentAccount)
479 BOOST_FOREACH(const PAIRTYPE(string,int64)& s, listSent)
483 CRITICAL_BLOCK(pwallet->cs_mapAddressBook)
485 BOOST_FOREACH(const PAIRTYPE(string,int64)& r, listReceived)
487 if (pwallet->mapAddressBook.count(r.first))
489 map<string, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
490 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
491 nReceived += r.second;
493 else if (strAccount.empty())
495 nReceived += r.second;
501 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
505 const int COPY_DEPTH = 3;
506 if (SetMerkleBranch() < COPY_DEPTH)
508 vector<uint256> vWorkQueue;
509 BOOST_FOREACH(const CTxIn& txin, vin)
510 vWorkQueue.push_back(txin.prevout.hash);
512 // This critsect is OK because txdb is already open
513 CRITICAL_BLOCK(pwallet->cs_mapWallet)
515 map<uint256, const CMerkleTx*> mapWalletPrev;
516 set<uint256> setAlreadyDone;
517 for (int i = 0; i < vWorkQueue.size(); i++)
519 uint256 hash = vWorkQueue[i];
520 if (setAlreadyDone.count(hash))
522 setAlreadyDone.insert(hash);
525 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
526 if (mi != pwallet->mapWallet.end())
529 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
530 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
532 else if (mapWalletPrev.count(hash))
534 tx = *mapWalletPrev[hash];
536 else if (!fClient && txdb.ReadDiskTx(hash, tx))
542 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
546 int nDepth = tx.SetMerkleBranch();
547 vtxPrev.push_back(tx);
549 if (nDepth < COPY_DEPTH)
550 BOOST_FOREACH(const CTxIn& txin, tx.vin)
551 vWorkQueue.push_back(txin.prevout.hash);
556 reverse(vtxPrev.begin(), vtxPrev.end());
559 bool CWalletTx::WriteToDisk()
561 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
564 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
568 CBlockIndex* pindex = pindexStart;
569 CRITICAL_BLOCK(cs_mapWallet)
574 block.ReadFromDisk(pindex, true);
575 BOOST_FOREACH(CTransaction& tx, block.vtx)
577 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
580 pindex = pindex->pnext;
586 void CWallet::ReacceptWalletTransactions()
590 while (fRepeat) CRITICAL_BLOCK(cs_mapWallet)
593 vector<CDiskTxPos> vMissingTx;
594 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
596 CWalletTx& wtx = item.second;
597 if (wtx.IsCoinBase() && wtx.IsSpent(0))
601 bool fUpdated = false;
602 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
604 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
605 if (txindex.vSpent.size() != wtx.vout.size())
607 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
610 for (int i = 0; i < txindex.vSpent.size(); i++)
614 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
618 vMissingTx.push_back(txindex.vSpent[i]);
623 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
630 // Reaccept any txes of ours that aren't already in a block
631 if (!wtx.IsCoinBase())
632 wtx.AcceptWalletTransaction(txdb, false);
635 if (!vMissingTx.empty())
637 // TODO: optimize this to scan just part of the block chain?
638 if (ScanForWalletTransactions(pindexGenesisBlock))
639 fRepeat = true; // Found missing transactions: re-do Reaccept.
644 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
646 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
648 if (!tx.IsCoinBase())
650 uint256 hash = tx.GetHash();
651 if (!txdb.ContainsTx(hash))
652 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
657 uint256 hash = GetHash();
658 if (!txdb.ContainsTx(hash))
660 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
661 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
666 void CWalletTx::RelayWalletTransaction()
669 RelayWalletTransaction(txdb);
672 void CWallet::ResendWalletTransactions()
674 // Do this infrequently and randomly to avoid giving away
675 // that these are our transactions.
676 static int64 nNextTime;
677 if (GetTime() < nNextTime)
679 bool fFirst = (nNextTime == 0);
680 nNextTime = GetTime() + GetRand(30 * 60);
684 // Only do it if there's been a new block since last time
685 static int64 nLastTime;
686 if (nTimeBestReceived < nLastTime)
688 nLastTime = GetTime();
690 // Rebroadcast any of our txes that aren't in a block yet
691 printf("ResendWalletTransactions()\n");
693 CRITICAL_BLOCK(cs_mapWallet)
695 // Sort them in chronological order
696 multimap<unsigned int, CWalletTx*> mapSorted;
697 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
699 CWalletTx& wtx = item.second;
700 // Don't rebroadcast until it's had plenty of time that
701 // it should have gotten in already by now.
702 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
703 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
705 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
707 CWalletTx& wtx = *item.second;
708 wtx.RelayWalletTransaction(txdb);
718 //////////////////////////////////////////////////////////////////////////////
724 int64 CWallet::GetBalance() const
727 CRITICAL_BLOCK(cs_mapWallet)
729 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
731 const CWalletTx* pcoin = &(*it).second;
732 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
734 nTotal += pcoin->GetAvailableCredit();
742 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
747 // List of values less than target
748 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
749 coinLowestLarger.first = INT64_MAX;
750 coinLowestLarger.second.first = NULL;
751 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
752 int64 nTotalLower = 0;
754 CRITICAL_BLOCK(cs_mapWallet)
756 vector<const CWalletTx*> vCoins;
757 vCoins.reserve(mapWallet.size());
758 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
759 vCoins.push_back(&(*it).second);
760 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
762 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
764 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
767 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
770 int nDepth = pcoin->GetDepthInMainChain();
771 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
774 for (int i = 0; i < pcoin->vout.size(); i++)
776 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
779 int64 n = pcoin->vout[i].nValue;
784 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
786 if (n == nTargetValue)
788 setCoinsRet.insert(coin.second);
789 nValueRet += coin.first;
792 else if (n < nTargetValue + CENT)
794 vValue.push_back(coin);
797 else if (n < coinLowestLarger.first)
799 coinLowestLarger = coin;
805 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
807 for (int i = 0; i < vValue.size(); ++i)
809 setCoinsRet.insert(vValue[i].second);
810 nValueRet += vValue[i].first;
815 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
817 if (coinLowestLarger.second.first == NULL)
819 setCoinsRet.insert(coinLowestLarger.second);
820 nValueRet += coinLowestLarger.first;
824 if (nTotalLower >= nTargetValue + CENT)
825 nTargetValue += CENT;
827 // Solve subset sum by stochastic approximation
828 sort(vValue.rbegin(), vValue.rend());
829 vector<char> vfIncluded;
830 vector<char> vfBest(vValue.size(), true);
831 int64 nBest = nTotalLower;
833 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
835 vfIncluded.assign(vValue.size(), false);
837 bool fReachedTarget = false;
838 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
840 for (int i = 0; i < vValue.size(); i++)
842 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
844 nTotal += vValue[i].first;
845 vfIncluded[i] = true;
846 if (nTotal >= nTargetValue)
848 fReachedTarget = true;
854 nTotal -= vValue[i].first;
855 vfIncluded[i] = false;
862 // If the next larger is still closer, return it
863 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
865 setCoinsRet.insert(coinLowestLarger.second);
866 nValueRet += coinLowestLarger.first;
869 for (int i = 0; i < vValue.size(); i++)
872 setCoinsRet.insert(vValue[i].second);
873 nValueRet += vValue[i].first;
877 printf("SelectCoins() best subset: ");
878 for (int i = 0; i < vValue.size(); i++)
880 printf("%s ", FormatMoney(vValue[i].first).c_str());
881 printf("total %s\n", FormatMoney(nBest).c_str());
887 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
889 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
890 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
891 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
897 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
900 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
906 if (vecSend.empty() || nValue < 0)
909 wtxNew.pwallet = this;
911 CRITICAL_BLOCK(cs_main)
913 // txdb must be opened before the mapWallet lock
915 CRITICAL_BLOCK(cs_mapWallet)
917 nFeeRet = nTransactionFee;
922 wtxNew.fFromMe = true;
924 int64 nTotalValue = nValue + nFeeRet;
925 double dPriority = 0;
926 // vouts to the payees
927 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
928 wtxNew.vout.push_back(CTxOut(s.second, s.first));
930 // Choose coins to use
931 set<pair<const CWalletTx*,unsigned int> > setCoins;
933 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
935 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
937 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
938 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
941 // Fill a vout back to self with any change
942 int64 nChange = nValueIn - nTotalValue;
945 // Note: We use a new key here to keep it from being obvious which side is the change.
946 // The drawback is that by not reusing a previous key, the change may be lost if a
947 // backup is restored, if the backup doesn't have the new private key for the change.
948 // If we reused the old key, it would be possible to add code to look for and
949 // rediscover unknown transactions that were written with keys of ours to recover
950 // post-backup change.
952 // Reserve a new key pair from key pool
953 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
954 // assert(mapKeys.count(vchPubKey));
956 // Fill a vout to ourself, using same address type as the payment
957 CScript scriptChange;
958 if (vecSend[0].first.GetBitcoinAddressHash160() != 0)
959 scriptChange.SetBitcoinAddress(vchPubKey);
961 scriptChange << vchPubKey << OP_CHECKSIG;
963 // Insert change txn at random position:
964 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
965 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
968 reservekey.ReturnKey();
971 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
972 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
976 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
977 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
981 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
982 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
986 // Check that enough fee is included
987 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
988 bool fAllowFree = CTransaction::AllowFree(dPriority);
989 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
990 if (nFeeRet < max(nPayFee, nMinFee))
992 nFeeRet = max(nPayFee, nMinFee);
996 // Fill vtxPrev by copying from previous transactions vtxPrev
997 wtxNew.AddSupportingTransactions(txdb);
998 wtxNew.fTimeReceivedIsTxTime = true;
1007 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1009 vector< pair<CScript, int64> > vecSend;
1010 vecSend.push_back(make_pair(scriptPubKey, nValue));
1011 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1014 // Call after CreateTransaction unless you want to abort
1015 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1017 CRITICAL_BLOCK(cs_main)
1019 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1020 CRITICAL_BLOCK(cs_mapWallet)
1022 // This is only to keep the database open to defeat the auto-flush for the
1023 // duration of this scope. This is the only place where this optimization
1024 // maybe makes sense; please don't do it anywhere else.
1025 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1027 // Take key pair from key pool so it won't be used again
1028 reservekey.KeepKey();
1030 // Add tx to wallet, because if it has change it's also ours,
1031 // otherwise just for transaction history.
1032 AddToWallet(wtxNew);
1034 // Mark old coins as spent
1035 set<CWalletTx*> setCoins;
1036 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1038 CWalletTx &coin = mapWallet[txin.prevout.hash];
1039 coin.pwallet = this;
1040 coin.MarkSpent(txin.prevout.n);
1042 vWalletUpdated.push_back(coin.GetHash());
1049 // Track how many getdata requests our transaction gets
1050 CRITICAL_BLOCK(cs_mapRequestCount)
1051 mapRequestCount[wtxNew.GetHash()] = 0;
1054 if (!wtxNew.AcceptToMemoryPool())
1056 // This must not fail. The transaction has already been signed and recorded.
1057 printf("CommitTransaction() : Error: Transaction not valid");
1060 wtxNew.RelayWalletTransaction();
1069 // requires cs_main lock
1070 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1072 CReserveKey reservekey(this);
1074 CRITICAL_BLOCK(cs_vMasterKey)
1078 string strError = _("Error: Wallet locked, unable to create transaction ");
1079 printf("SendMoney() : %s", strError.c_str());
1082 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1085 if (nValue + nFeeRequired > GetBalance())
1086 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());
1088 strError = _("Error: Transaction creation failed ");
1089 printf("SendMoney() : %s", strError.c_str());
1094 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1097 if (!CommitTransaction(wtxNew, reservekey))
1098 return _("Error: The transaction was rejected. This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here.");
1106 // requires cs_main lock
1107 string CWallet::SendMoneyToBitcoinAddress(string strAddress, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1111 return _("Invalid amount");
1112 if (nValue + nTransactionFee > GetBalance())
1113 return _("Insufficient funds");
1115 // Parse bitcoin address
1116 CScript scriptPubKey;
1117 if (!scriptPubKey.SetBitcoinAddress(strAddress))
1118 return _("Invalid bitcoin address");
1120 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1126 int CWallet::LoadWallet(bool& fFirstRunRet)
1130 fFirstRunRet = false;
1131 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1132 if (nLoadWalletRet != DB_LOAD_OK)
1133 return nLoadWalletRet;
1134 fFirstRunRet = vchDefaultKey.empty();
1136 if (!HaveKey(Hash160(vchDefaultKey)))
1138 // Create new keyUser and set as default key
1139 RandAddSeedPerfmon();
1141 SetDefaultKey(GetOrReuseKeyFromPool());
1142 if (!SetAddressBookName(PubKeyToAddress(vchDefaultKey), ""))
1143 return DB_LOAD_FAIL;
1146 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1151 bool CWallet::SetAddressBookName(const string& strAddress, const string& strName)
1153 mapAddressBook[strAddress] = strName;
1156 return CWalletDB(strWalletFile).WriteName(strAddress, strName);
1159 bool CWallet::DelAddressBookName(const string& strAddress)
1161 mapAddressBook.erase(strAddress);
1164 return CWalletDB(strWalletFile).EraseName(strAddress);
1168 void CWallet::PrintWallet(const CBlock& block)
1170 CRITICAL_BLOCK(cs_mapWallet)
1172 if (mapWallet.count(block.vtx[0].GetHash()))
1174 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1175 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1181 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1183 CRITICAL_BLOCK(cs_mapWallet)
1185 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1186 if (mi != mapWallet.end())
1195 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1199 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1202 vchDefaultKey = vchPubKey;
1206 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1208 if (!pwallet->fFileBacked)
1210 strWalletFileOut = pwallet->strWalletFile;
1214 bool CWallet::TopUpKeyPool()
1216 CRITICAL_BLOCK(cs_main)
1217 CRITICAL_BLOCK(cs_mapWallet)
1218 CRITICAL_BLOCK(cs_setKeyPool)
1219 CRITICAL_BLOCK(cs_vMasterKey)
1224 CWalletDB walletdb(strWalletFile);
1227 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1228 while (setKeyPool.size() < nTargetSize+1)
1231 if (!setKeyPool.empty())
1232 nEnd = *(--setKeyPool.end()) + 1;
1233 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1234 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1235 setKeyPool.insert(nEnd);
1236 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1242 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1245 keypool.vchPubKey.clear();
1246 CRITICAL_BLOCK(cs_main)
1247 CRITICAL_BLOCK(cs_mapWallet)
1248 CRITICAL_BLOCK(cs_setKeyPool)
1253 // Get the oldest key
1254 if(setKeyPool.empty())
1257 CWalletDB walletdb(strWalletFile);
1259 nIndex = *(setKeyPool.begin());
1260 setKeyPool.erase(setKeyPool.begin());
1261 if (!walletdb.ReadPool(nIndex, keypool))
1262 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1263 if (!HaveKey(Hash160(keypool.vchPubKey)))
1264 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1265 assert(!keypool.vchPubKey.empty());
1266 printf("keypool reserve %"PRI64d"\n", nIndex);
1270 void CWallet::KeepKey(int64 nIndex)
1272 // Remove from key pool
1275 CWalletDB walletdb(strWalletFile);
1276 CRITICAL_BLOCK(cs_main)
1278 walletdb.ErasePool(nIndex);
1281 printf("keypool keep %"PRI64d"\n", nIndex);
1284 void CWallet::ReturnKey(int64 nIndex)
1286 // Return to key pool
1287 CRITICAL_BLOCK(cs_setKeyPool)
1288 setKeyPool.insert(nIndex);
1289 printf("keypool return %"PRI64d"\n", nIndex);
1292 vector<unsigned char> CWallet::GetOrReuseKeyFromPool()
1296 ReserveKeyFromKeyPool(nIndex, keypool);
1298 return vchDefaultKey;
1300 return keypool.vchPubKey;
1303 int64 CWallet::GetOldestKeyPoolTime()
1307 ReserveKeyFromKeyPool(nIndex, keypool);
1311 return keypool.nTime;
1314 vector<unsigned char> CReserveKey::GetReservedKey()
1319 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1321 vchPubKey = keypool.vchPubKey;
1324 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1325 vchPubKey = pwallet->vchDefaultKey;
1328 assert(!vchPubKey.empty());
1332 void CReserveKey::KeepKey()
1335 pwallet->KeepKey(nIndex);
1340 void CReserveKey::ReturnKey()
1343 pwallet->ReturnKey(nIndex);