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_mapPubKeys)
128 CRITICAL_BLOCK(cs_KeyStore)
129 CRITICAL_BLOCK(cs_vMasterKey)
130 CRITICAL_BLOCK(cs_pwalletdbEncryption)
135 CKeyingMaterial vMasterKey;
136 RandAddSeedPerfmon();
138 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
139 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
141 CMasterKey kMasterKey;
143 RandAddSeedPerfmon();
144 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
145 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
148 int64 nStartTime = GetTimeMillis();
149 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
150 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
152 nStartTime = GetTimeMillis();
153 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
154 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
156 if (kMasterKey.nDeriveIterations < 25000)
157 kMasterKey.nDeriveIterations = 25000;
159 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
161 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
163 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
166 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
169 pwalletdbEncryption = new CWalletDB(strWalletFile);
170 pwalletdbEncryption->TxnBegin();
171 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
174 if (!EncryptKeys(vMasterKey))
177 pwalletdbEncryption->TxnAbort();
178 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.
183 CCorruptAddress corruptAddress;
184 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
185 if (!pwalletdbEncryption->TxnCommit())
186 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.
188 pwalletdbEncryption->Close();
189 pwalletdbEncryption = NULL;
197 void CWallet::WalletUpdateSpent(const CTransaction &tx)
199 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
200 // Update the wallet spent flag if it doesn't know due to wallet.dat being
201 // restored from backup or the user making copies of wallet.dat.
202 CRITICAL_BLOCK(cs_mapWallet)
204 BOOST_FOREACH(const CTxIn& txin, tx.vin)
206 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
207 if (mi != mapWallet.end())
209 CWalletTx& wtx = (*mi).second;
210 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
212 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
213 wtx.MarkSpent(txin.prevout.n);
215 vWalletUpdated.push_back(txin.prevout.hash);
222 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
224 uint256 hash = wtxIn.GetHash();
225 CRITICAL_BLOCK(cs_mapWallet)
227 // Inserts only if not already there, returns tx inserted or tx found
228 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
229 CWalletTx& wtx = (*ret.first).second;
231 bool fInsertedNew = ret.second;
233 wtx.nTimeReceived = GetAdjustedTime();
235 bool fUpdated = false;
239 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
241 wtx.hashBlock = wtxIn.hashBlock;
244 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
246 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
247 wtx.nIndex = wtxIn.nIndex;
250 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
252 wtx.fFromMe = wtxIn.fFromMe;
255 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
259 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
262 if (fInsertedNew || fUpdated)
263 if (!wtx.WriteToDisk())
266 // If default receiving address gets used, replace it with a new one
267 CScript scriptDefaultKey;
268 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
269 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
271 if (txout.scriptPubKey == scriptDefaultKey)
273 SetDefaultKey(GetOrReuseKeyFromPool());
274 SetAddressBookName(PubKeyToAddress(vchDefaultKey), "");
279 vWalletUpdated.push_back(hash);
281 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
282 WalletUpdateSpent(wtx);
290 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
292 uint256 hash = tx.GetHash();
293 bool fExisted = mapWallet.count(hash);
294 if (fExisted && !fUpdate) return false;
295 if (fExisted || IsMine(tx) || IsFromMe(tx))
297 CWalletTx wtx(this,tx);
298 // Get merkle branch if transaction was found in a block
300 wtx.SetMerkleBranch(pblock);
301 return AddToWallet(wtx);
304 WalletUpdateSpent(tx);
308 bool CWallet::EraseFromWallet(uint256 hash)
312 CRITICAL_BLOCK(cs_mapWallet)
314 if (mapWallet.erase(hash))
315 CWalletDB(strWalletFile).EraseTx(hash);
321 bool CWallet::IsMine(const CTxIn &txin) const
323 CRITICAL_BLOCK(cs_mapWallet)
325 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
326 if (mi != mapWallet.end())
328 const CWalletTx& prev = (*mi).second;
329 if (txin.prevout.n < prev.vout.size())
330 if (IsMine(prev.vout[txin.prevout.n]))
337 int64 CWallet::GetDebit(const CTxIn &txin) const
339 CRITICAL_BLOCK(cs_mapWallet)
341 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
342 if (mi != mapWallet.end())
344 const CWalletTx& prev = (*mi).second;
345 if (txin.prevout.n < prev.vout.size())
346 if (IsMine(prev.vout[txin.prevout.n]))
347 return prev.vout[txin.prevout.n].nValue;
353 int64 CWalletTx::GetTxTime() const
355 if (!fTimeReceivedIsTxTime && hashBlock != 0)
357 // If we did not receive the transaction directly, we rely on the block's
358 // time to figure out when it happened. We use the median over a range
359 // of blocks to try to filter out inaccurate block times.
360 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
361 if (mi != mapBlockIndex.end())
363 CBlockIndex* pindex = (*mi).second;
365 return pindex->GetMedianTime();
368 return nTimeReceived;
371 int CWalletTx::GetRequestCount() const
373 // Returns -1 if it wasn't being tracked
375 CRITICAL_BLOCK(pwallet->cs_mapRequestCount)
382 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
383 if (mi != pwallet->mapRequestCount.end())
384 nRequests = (*mi).second;
389 // Did anyone request this transaction?
390 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
391 if (mi != pwallet->mapRequestCount.end())
393 nRequests = (*mi).second;
395 // How about the block it's in?
396 if (nRequests == 0 && hashBlock != 0)
398 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
399 if (mi != pwallet->mapRequestCount.end())
400 nRequests = (*mi).second;
402 nRequests = 1; // If it's in someone else's block it must have got out
410 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<string, int64> >& listReceived,
411 list<pair<string, int64> >& listSent, int64& nFee, string& strSentAccount) const
413 nGeneratedImmature = nGeneratedMature = nFee = 0;
414 listReceived.clear();
416 strSentAccount = strFromAccount;
420 if (GetBlocksToMaturity() > 0)
421 nGeneratedImmature = pwallet->GetCredit(*this);
423 nGeneratedMature = GetCredit();
428 int64 nDebit = GetDebit();
429 if (nDebit > 0) // debit>0 means we signed/sent this transaction
431 int64 nValueOut = GetValueOut();
432 nFee = nDebit - nValueOut;
435 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
436 // but non-standard clients might (so return a list of address/amount pairs)
437 BOOST_FOREACH(const CTxOut& txout, vout)
441 vector<unsigned char> vchPubKey;
442 if (ExtractHash160(txout.scriptPubKey, hash160))
443 address = Hash160ToAddress(hash160);
444 else if (ExtractPubKey(txout.scriptPubKey, NULL, vchPubKey))
445 address = PubKeyToAddress(vchPubKey);
448 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
449 this->GetHash().ToString().c_str());
450 address = " unknown ";
453 // Don't report 'change' txouts
454 if (nDebit > 0 && pwallet->IsChange(txout))
458 listSent.push_back(make_pair(address, txout.nValue));
460 if (pwallet->IsMine(txout))
461 listReceived.push_back(make_pair(address, txout.nValue));
466 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
467 int64& nSent, int64& nFee) const
469 nGenerated = nReceived = nSent = nFee = 0;
471 int64 allGeneratedImmature, allGeneratedMature, allFee;
472 allGeneratedImmature = allGeneratedMature = allFee = 0;
473 string strSentAccount;
474 list<pair<string, int64> > listReceived;
475 list<pair<string, int64> > listSent;
476 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
478 if (strAccount == "")
479 nGenerated = allGeneratedMature;
480 if (strAccount == strSentAccount)
482 BOOST_FOREACH(const PAIRTYPE(string,int64)& s, listSent)
486 CRITICAL_BLOCK(pwallet->cs_mapAddressBook)
488 BOOST_FOREACH(const PAIRTYPE(string,int64)& r, listReceived)
490 if (pwallet->mapAddressBook.count(r.first))
492 map<string, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
493 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
494 nReceived += r.second;
496 else if (strAccount.empty())
498 nReceived += r.second;
504 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
508 const int COPY_DEPTH = 3;
509 if (SetMerkleBranch() < COPY_DEPTH)
511 vector<uint256> vWorkQueue;
512 BOOST_FOREACH(const CTxIn& txin, vin)
513 vWorkQueue.push_back(txin.prevout.hash);
515 // This critsect is OK because txdb is already open
516 CRITICAL_BLOCK(pwallet->cs_mapWallet)
518 map<uint256, const CMerkleTx*> mapWalletPrev;
519 set<uint256> setAlreadyDone;
520 for (int i = 0; i < vWorkQueue.size(); i++)
522 uint256 hash = vWorkQueue[i];
523 if (setAlreadyDone.count(hash))
525 setAlreadyDone.insert(hash);
528 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
529 if (mi != pwallet->mapWallet.end())
532 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
533 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
535 else if (mapWalletPrev.count(hash))
537 tx = *mapWalletPrev[hash];
539 else if (!fClient && txdb.ReadDiskTx(hash, tx))
545 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
549 int nDepth = tx.SetMerkleBranch();
550 vtxPrev.push_back(tx);
552 if (nDepth < COPY_DEPTH)
553 BOOST_FOREACH(const CTxIn& txin, tx.vin)
554 vWorkQueue.push_back(txin.prevout.hash);
559 reverse(vtxPrev.begin(), vtxPrev.end());
562 bool CWalletTx::WriteToDisk()
564 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
567 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
571 CBlockIndex* pindex = pindexStart;
572 CRITICAL_BLOCK(cs_mapWallet)
577 block.ReadFromDisk(pindex, true);
578 BOOST_FOREACH(CTransaction& tx, block.vtx)
580 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
583 pindex = pindex->pnext;
589 void CWallet::ReacceptWalletTransactions()
593 while (fRepeat) CRITICAL_BLOCK(cs_mapWallet)
596 vector<CDiskTxPos> vMissingTx;
597 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
599 CWalletTx& wtx = item.second;
600 if (wtx.IsCoinBase() && wtx.IsSpent(0))
604 bool fUpdated = false;
605 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
607 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
608 if (txindex.vSpent.size() != wtx.vout.size())
610 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
613 for (int i = 0; i < txindex.vSpent.size(); i++)
617 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
621 vMissingTx.push_back(txindex.vSpent[i]);
626 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
633 // Reaccept any txes of ours that aren't already in a block
634 if (!wtx.IsCoinBase())
635 wtx.AcceptWalletTransaction(txdb, false);
638 if (!vMissingTx.empty())
640 // TODO: optimize this to scan just part of the block chain?
641 if (ScanForWalletTransactions(pindexGenesisBlock))
642 fRepeat = true; // Found missing transactions: re-do Reaccept.
647 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
649 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
651 if (!tx.IsCoinBase())
653 uint256 hash = tx.GetHash();
654 if (!txdb.ContainsTx(hash))
655 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
660 uint256 hash = GetHash();
661 if (!txdb.ContainsTx(hash))
663 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
664 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
669 void CWalletTx::RelayWalletTransaction()
672 RelayWalletTransaction(txdb);
675 void CWallet::ResendWalletTransactions()
677 // Do this infrequently and randomly to avoid giving away
678 // that these are our transactions.
679 static int64 nNextTime;
680 if (GetTime() < nNextTime)
682 bool fFirst = (nNextTime == 0);
683 nNextTime = GetTime() + GetRand(30 * 60);
687 // Only do it if there's been a new block since last time
688 static int64 nLastTime;
689 if (nTimeBestReceived < nLastTime)
691 nLastTime = GetTime();
693 // Rebroadcast any of our txes that aren't in a block yet
694 printf("ResendWalletTransactions()\n");
696 CRITICAL_BLOCK(cs_mapWallet)
698 // Sort them in chronological order
699 multimap<unsigned int, CWalletTx*> mapSorted;
700 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
702 CWalletTx& wtx = item.second;
703 // Don't rebroadcast until it's had plenty of time that
704 // it should have gotten in already by now.
705 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
706 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
708 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
710 CWalletTx& wtx = *item.second;
711 wtx.RelayWalletTransaction(txdb);
721 //////////////////////////////////////////////////////////////////////////////
727 int64 CWallet::GetBalance() const
730 CRITICAL_BLOCK(cs_mapWallet)
732 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
734 const CWalletTx* pcoin = &(*it).second;
735 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
737 nTotal += pcoin->GetAvailableCredit();
745 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
750 // List of values less than target
751 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
752 coinLowestLarger.first = INT64_MAX;
753 coinLowestLarger.second.first = NULL;
754 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
755 int64 nTotalLower = 0;
757 CRITICAL_BLOCK(cs_mapWallet)
759 vector<const CWalletTx*> vCoins;
760 vCoins.reserve(mapWallet.size());
761 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
762 vCoins.push_back(&(*it).second);
763 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
765 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
767 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
770 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
773 int nDepth = pcoin->GetDepthInMainChain();
774 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
777 for (int i = 0; i < pcoin->vout.size(); i++)
779 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
782 int64 n = pcoin->vout[i].nValue;
787 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
789 if (n == nTargetValue)
791 setCoinsRet.insert(coin.second);
792 nValueRet += coin.first;
795 else if (n < nTargetValue + CENT)
797 vValue.push_back(coin);
800 else if (n < coinLowestLarger.first)
802 coinLowestLarger = coin;
808 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
810 for (int i = 0; i < vValue.size(); ++i)
812 setCoinsRet.insert(vValue[i].second);
813 nValueRet += vValue[i].first;
818 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
820 if (coinLowestLarger.second.first == NULL)
822 setCoinsRet.insert(coinLowestLarger.second);
823 nValueRet += coinLowestLarger.first;
827 if (nTotalLower >= nTargetValue + CENT)
828 nTargetValue += CENT;
830 // Solve subset sum by stochastic approximation
831 sort(vValue.rbegin(), vValue.rend());
832 vector<char> vfIncluded;
833 vector<char> vfBest(vValue.size(), true);
834 int64 nBest = nTotalLower;
836 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
838 vfIncluded.assign(vValue.size(), false);
840 bool fReachedTarget = false;
841 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
843 for (int i = 0; i < vValue.size(); i++)
845 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
847 nTotal += vValue[i].first;
848 vfIncluded[i] = true;
849 if (nTotal >= nTargetValue)
851 fReachedTarget = true;
857 nTotal -= vValue[i].first;
858 vfIncluded[i] = false;
865 // If the next larger is still closer, return it
866 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
868 setCoinsRet.insert(coinLowestLarger.second);
869 nValueRet += coinLowestLarger.first;
872 for (int i = 0; i < vValue.size(); i++)
875 setCoinsRet.insert(vValue[i].second);
876 nValueRet += vValue[i].first;
880 printf("SelectCoins() best subset: ");
881 for (int i = 0; i < vValue.size(); i++)
883 printf("%s ", FormatMoney(vValue[i].first).c_str());
884 printf("total %s\n", FormatMoney(nBest).c_str());
890 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
892 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
893 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
894 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
900 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
903 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
909 if (vecSend.empty() || nValue < 0)
912 wtxNew.pwallet = this;
914 CRITICAL_BLOCK(cs_main)
916 // txdb must be opened before the mapWallet lock
918 CRITICAL_BLOCK(cs_mapWallet)
920 nFeeRet = nTransactionFee;
925 wtxNew.fFromMe = true;
927 int64 nTotalValue = nValue + nFeeRet;
928 double dPriority = 0;
929 // vouts to the payees
930 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
931 wtxNew.vout.push_back(CTxOut(s.second, s.first));
933 // Choose coins to use
934 set<pair<const CWalletTx*,unsigned int> > setCoins;
936 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
938 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
940 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
941 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
944 // Fill a vout back to self with any change
945 int64 nChange = nValueIn - nTotalValue;
948 // Note: We use a new key here to keep it from being obvious which side is the change.
949 // The drawback is that by not reusing a previous key, the change may be lost if a
950 // backup is restored, if the backup doesn't have the new private key for the change.
951 // If we reused the old key, it would be possible to add code to look for and
952 // rediscover unknown transactions that were written with keys of ours to recover
953 // post-backup change.
955 // Reserve a new key pair from key pool
956 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
957 // assert(mapKeys.count(vchPubKey));
959 // Fill a vout to ourself, using same address type as the payment
960 CScript scriptChange;
961 if (vecSend[0].first.GetBitcoinAddressHash160() != 0)
962 scriptChange.SetBitcoinAddress(vchPubKey);
964 scriptChange << vchPubKey << OP_CHECKSIG;
966 // Insert change txn at random position:
967 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
968 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
971 reservekey.ReturnKey();
974 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
975 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
979 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
980 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
984 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
985 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
989 // Check that enough fee is included
990 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
991 bool fAllowFree = CTransaction::AllowFree(dPriority);
992 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
993 if (nFeeRet < max(nPayFee, nMinFee))
995 nFeeRet = max(nPayFee, nMinFee);
999 // Fill vtxPrev by copying from previous transactions vtxPrev
1000 wtxNew.AddSupportingTransactions(txdb);
1001 wtxNew.fTimeReceivedIsTxTime = true;
1010 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1012 vector< pair<CScript, int64> > vecSend;
1013 vecSend.push_back(make_pair(scriptPubKey, nValue));
1014 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1017 // Call after CreateTransaction unless you want to abort
1018 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1020 CRITICAL_BLOCK(cs_main)
1022 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1023 CRITICAL_BLOCK(cs_mapWallet)
1025 // This is only to keep the database open to defeat the auto-flush for the
1026 // duration of this scope. This is the only place where this optimization
1027 // maybe makes sense; please don't do it anywhere else.
1028 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1030 // Take key pair from key pool so it won't be used again
1031 reservekey.KeepKey();
1033 // Add tx to wallet, because if it has change it's also ours,
1034 // otherwise just for transaction history.
1035 AddToWallet(wtxNew);
1037 // Mark old coins as spent
1038 set<CWalletTx*> setCoins;
1039 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1041 CWalletTx &coin = mapWallet[txin.prevout.hash];
1042 coin.pwallet = this;
1043 coin.MarkSpent(txin.prevout.n);
1045 vWalletUpdated.push_back(coin.GetHash());
1052 // Track how many getdata requests our transaction gets
1053 CRITICAL_BLOCK(cs_mapRequestCount)
1054 mapRequestCount[wtxNew.GetHash()] = 0;
1057 if (!wtxNew.AcceptToMemoryPool())
1059 // This must not fail. The transaction has already been signed and recorded.
1060 printf("CommitTransaction() : Error: Transaction not valid");
1063 wtxNew.RelayWalletTransaction();
1072 // requires cs_main lock
1073 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1075 CReserveKey reservekey(this);
1077 CRITICAL_BLOCK(cs_vMasterKey)
1081 string strError = _("Error: Wallet locked, unable to create transaction ");
1082 printf("SendMoney() : %s", strError.c_str());
1085 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1088 if (nValue + nFeeRequired > GetBalance())
1089 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());
1091 strError = _("Error: Transaction creation failed ");
1092 printf("SendMoney() : %s", strError.c_str());
1097 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1100 if (!CommitTransaction(wtxNew, reservekey))
1101 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.");
1109 // requires cs_main lock
1110 string CWallet::SendMoneyToBitcoinAddress(string strAddress, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1114 return _("Invalid amount");
1115 if (nValue + nTransactionFee > GetBalance())
1116 return _("Insufficient funds");
1118 // Parse bitcoin address
1119 CScript scriptPubKey;
1120 if (!scriptPubKey.SetBitcoinAddress(strAddress))
1121 return _("Invalid bitcoin address");
1123 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1129 int CWallet::LoadWallet(bool& fFirstRunRet)
1133 fFirstRunRet = false;
1134 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1135 if (nLoadWalletRet != DB_LOAD_OK)
1136 return nLoadWalletRet;
1137 fFirstRunRet = vchDefaultKey.empty();
1139 if (!HaveKey(vchDefaultKey))
1141 // Create new keyUser and set as default key
1142 RandAddSeedPerfmon();
1144 SetDefaultKey(GetOrReuseKeyFromPool());
1145 if (!SetAddressBookName(PubKeyToAddress(vchDefaultKey), ""))
1146 return DB_LOAD_FAIL;
1149 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1154 bool CWallet::SetAddressBookName(const string& strAddress, const string& strName)
1156 mapAddressBook[strAddress] = strName;
1159 return CWalletDB(strWalletFile).WriteName(strAddress, strName);
1162 bool CWallet::DelAddressBookName(const string& strAddress)
1164 mapAddressBook.erase(strAddress);
1167 return CWalletDB(strWalletFile).EraseName(strAddress);
1171 void CWallet::PrintWallet(const CBlock& block)
1173 CRITICAL_BLOCK(cs_mapWallet)
1175 if (mapWallet.count(block.vtx[0].GetHash()))
1177 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1178 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1184 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1186 CRITICAL_BLOCK(cs_mapWallet)
1188 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1189 if (mi != mapWallet.end())
1198 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1202 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1205 vchDefaultKey = vchPubKey;
1209 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1211 if (!pwallet->fFileBacked)
1213 strWalletFileOut = pwallet->strWalletFile;
1217 bool CWallet::TopUpKeyPool()
1219 CRITICAL_BLOCK(cs_main)
1220 CRITICAL_BLOCK(cs_mapWallet)
1221 CRITICAL_BLOCK(cs_setKeyPool)
1222 CRITICAL_BLOCK(cs_vMasterKey)
1227 CWalletDB walletdb(strWalletFile);
1230 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1231 while (setKeyPool.size() < nTargetSize+1)
1234 if (!setKeyPool.empty())
1235 nEnd = *(--setKeyPool.end()) + 1;
1236 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1237 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1238 setKeyPool.insert(nEnd);
1239 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1245 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1248 keypool.vchPubKey.clear();
1249 CRITICAL_BLOCK(cs_main)
1250 CRITICAL_BLOCK(cs_mapWallet)
1251 CRITICAL_BLOCK(cs_setKeyPool)
1256 // Get the oldest key
1257 if(setKeyPool.empty())
1260 CWalletDB walletdb(strWalletFile);
1262 nIndex = *(setKeyPool.begin());
1263 setKeyPool.erase(setKeyPool.begin());
1264 if (!walletdb.ReadPool(nIndex, keypool))
1265 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1266 if (!HaveKey(keypool.vchPubKey))
1267 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1268 assert(!keypool.vchPubKey.empty());
1269 printf("keypool reserve %"PRI64d"\n", nIndex);
1273 void CWallet::KeepKey(int64 nIndex)
1275 // Remove from key pool
1278 CWalletDB walletdb(strWalletFile);
1279 CRITICAL_BLOCK(cs_main)
1281 walletdb.ErasePool(nIndex);
1284 printf("keypool keep %"PRI64d"\n", nIndex);
1287 void CWallet::ReturnKey(int64 nIndex)
1289 // Return to key pool
1290 CRITICAL_BLOCK(cs_setKeyPool)
1291 setKeyPool.insert(nIndex);
1292 printf("keypool return %"PRI64d"\n", nIndex);
1295 vector<unsigned char> CWallet::GetOrReuseKeyFromPool()
1299 ReserveKeyFromKeyPool(nIndex, keypool);
1301 return vchDefaultKey;
1303 return keypool.vchPubKey;
1306 int64 CWallet::GetOldestKeyPoolTime()
1310 ReserveKeyFromKeyPool(nIndex, keypool);
1314 return keypool.nTime;
1317 vector<unsigned char> CReserveKey::GetReservedKey()
1322 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1324 vchPubKey = keypool.vchPubKey;
1327 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1328 vchPubKey = pwallet->vchDefaultKey;
1331 assert(!vchPubKey.empty());
1335 void CReserveKey::KeepKey()
1338 pwallet->KeepKey(nIndex);
1343 void CReserveKey::ReturnKey()
1346 pwallet->ReturnKey(nIndex);