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);
46 bool CWallet::Unlock(const string& strWalletPassphrase)
52 CKeyingMaterial vMasterKey;
54 CRITICAL_BLOCK(cs_wallet)
55 BOOST_FOREACH(const MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
57 if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
59 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
61 if (CCryptoKeyStore::Unlock(vMasterKey))
67 bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const string& strNewWalletPassphrase)
69 bool fWasLocked = IsLocked();
71 CRITICAL_BLOCK(cs_wallet)
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);
114 // This class implements an addrIncoming entry that causes pre-0.4
115 // clients to crash on startup if reading a private-key-encrypted wallet.
116 class CCorruptAddress
121 if (nType & SER_DISK)
126 bool CWallet::EncryptWallet(const string& strWalletPassphrase)
131 CKeyingMaterial vMasterKey;
132 RandAddSeedPerfmon();
134 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
135 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
137 CMasterKey kMasterKey;
139 RandAddSeedPerfmon();
140 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
141 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
144 int64 nStartTime = GetTimeMillis();
145 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
146 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
148 nStartTime = GetTimeMillis();
149 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
150 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
152 if (kMasterKey.nDeriveIterations < 25000)
153 kMasterKey.nDeriveIterations = 25000;
155 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
157 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
159 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
162 CRITICAL_BLOCK(cs_wallet)
164 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
167 pwalletdbEncryption = new CWalletDB(strWalletFile);
168 pwalletdbEncryption->TxnBegin();
169 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
172 if (!EncryptKeys(vMasterKey))
175 pwalletdbEncryption->TxnAbort();
176 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.
181 CCorruptAddress corruptAddress;
182 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
183 if (!pwalletdbEncryption->TxnCommit())
184 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.
186 pwalletdbEncryption->Close();
187 pwalletdbEncryption = NULL;
193 if (Resilver(strWalletFile))
194 CWalletDB(strWalletFile, "r+").WriteSetting("fIsResilvered", true);
199 void CWallet::WalletUpdateSpent(const CTransaction &tx)
201 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
202 // Update the wallet spent flag if it doesn't know due to wallet.dat being
203 // restored from backup or the user making copies of wallet.dat.
204 CRITICAL_BLOCK(cs_wallet)
206 BOOST_FOREACH(const CTxIn& txin, tx.vin)
208 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
209 if (mi != mapWallet.end())
211 CWalletTx& wtx = (*mi).second;
212 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
214 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
215 wtx.MarkSpent(txin.prevout.n);
217 vWalletUpdated.push_back(txin.prevout.hash);
224 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
226 uint256 hash = wtxIn.GetHash();
227 CRITICAL_BLOCK(cs_wallet)
229 // Inserts only if not already there, returns tx inserted or tx found
230 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
231 CWalletTx& wtx = (*ret.first).second;
233 bool fInsertedNew = ret.second;
235 wtx.nTimeReceived = GetAdjustedTime();
237 bool fUpdated = false;
241 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
243 wtx.hashBlock = wtxIn.hashBlock;
246 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
248 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
249 wtx.nIndex = wtxIn.nIndex;
252 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
254 wtx.fFromMe = wtxIn.fFromMe;
257 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
261 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
264 if (fInsertedNew || fUpdated)
265 if (!wtx.WriteToDisk())
268 // If default receiving address gets used, replace it with a new one
269 CScript scriptDefaultKey;
270 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
271 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
273 if (txout.scriptPubKey == scriptDefaultKey)
275 std::vector<unsigned char> newDefaultKey;
276 if (GetKeyFromPool(newDefaultKey, false))
278 SetDefaultKey(newDefaultKey);
279 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
285 vWalletUpdated.push_back(hash);
287 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
288 WalletUpdateSpent(wtx);
296 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
298 uint256 hash = tx.GetHash();
299 CRITICAL_BLOCK(cs_wallet)
301 bool fExisted = mapWallet.count(hash);
302 if (fExisted && !fUpdate) return false;
303 if (fExisted || IsMine(tx) || IsFromMe(tx))
305 CWalletTx wtx(this,tx);
306 // Get merkle branch if transaction was found in a block
308 wtx.SetMerkleBranch(pblock);
309 return AddToWallet(wtx);
312 WalletUpdateSpent(tx);
317 bool CWallet::EraseFromWallet(uint256 hash)
321 CRITICAL_BLOCK(cs_wallet)
323 if (mapWallet.erase(hash))
324 CWalletDB(strWalletFile).EraseTx(hash);
330 bool CWallet::IsMine(const CTxIn &txin) const
332 CRITICAL_BLOCK(cs_wallet)
334 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
335 if (mi != mapWallet.end())
337 const CWalletTx& prev = (*mi).second;
338 if (txin.prevout.n < prev.vout.size())
339 if (IsMine(prev.vout[txin.prevout.n]))
346 int64 CWallet::GetDebit(const CTxIn &txin) const
348 CRITICAL_BLOCK(cs_wallet)
350 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
351 if (mi != mapWallet.end())
353 const CWalletTx& prev = (*mi).second;
354 if (txin.prevout.n < prev.vout.size())
355 if (IsMine(prev.vout[txin.prevout.n]))
356 return prev.vout[txin.prevout.n].nValue;
362 int64 CWalletTx::GetTxTime() const
364 return nTimeReceived;
367 int CWalletTx::GetRequestCount() const
369 // Returns -1 if it wasn't being tracked
371 CRITICAL_BLOCK(pwallet->cs_wallet)
378 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
379 if (mi != pwallet->mapRequestCount.end())
380 nRequests = (*mi).second;
385 // Did anyone request this transaction?
386 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
387 if (mi != pwallet->mapRequestCount.end())
389 nRequests = (*mi).second;
391 // How about the block it's in?
392 if (nRequests == 0 && hashBlock != 0)
394 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
395 if (mi != pwallet->mapRequestCount.end())
396 nRequests = (*mi).second;
398 nRequests = 1; // If it's in someone else's block it must have got out
406 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
407 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
409 nGeneratedImmature = nGeneratedMature = nFee = 0;
410 listReceived.clear();
412 strSentAccount = strFromAccount;
416 if (GetBlocksToMaturity() > 0)
417 nGeneratedImmature = pwallet->GetCredit(*this);
419 nGeneratedMature = GetCredit();
424 int64 nDebit = GetDebit();
425 if (nDebit > 0) // debit>0 means we signed/sent this transaction
427 int64 nValueOut = GetValueOut();
428 nFee = nDebit - nValueOut;
431 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
432 // but non-standard clients might (so return a list of address/amount pairs)
433 BOOST_FOREACH(const CTxOut& txout, vout)
435 CBitcoinAddress address;
436 vector<unsigned char> vchPubKey;
437 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
439 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
440 this->GetHash().ToString().c_str());
441 address = " unknown ";
444 // Don't report 'change' txouts
445 if (nDebit > 0 && pwallet->IsChange(txout))
449 listSent.push_back(make_pair(address, txout.nValue));
451 if (pwallet->IsMine(txout))
452 listReceived.push_back(make_pair(address, txout.nValue));
457 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
458 int64& nSent, int64& nFee) const
460 nGenerated = nReceived = nSent = nFee = 0;
462 int64 allGeneratedImmature, allGeneratedMature, allFee;
463 allGeneratedImmature = allGeneratedMature = allFee = 0;
464 string strSentAccount;
465 list<pair<CBitcoinAddress, int64> > listReceived;
466 list<pair<CBitcoinAddress, int64> > listSent;
467 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
469 if (strAccount == "")
470 nGenerated = allGeneratedMature;
471 if (strAccount == strSentAccount)
473 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
477 CRITICAL_BLOCK(pwallet->cs_wallet)
479 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
481 if (pwallet->mapAddressBook.count(r.first))
483 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
484 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
485 nReceived += r.second;
487 else if (strAccount.empty())
489 nReceived += r.second;
495 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
499 const int COPY_DEPTH = 3;
500 if (SetMerkleBranch() < COPY_DEPTH)
502 vector<uint256> vWorkQueue;
503 BOOST_FOREACH(const CTxIn& txin, vin)
504 vWorkQueue.push_back(txin.prevout.hash);
506 // This critsect is OK because txdb is already open
507 CRITICAL_BLOCK(pwallet->cs_wallet)
509 map<uint256, const CMerkleTx*> mapWalletPrev;
510 set<uint256> setAlreadyDone;
511 for (int i = 0; i < vWorkQueue.size(); i++)
513 uint256 hash = vWorkQueue[i];
514 if (setAlreadyDone.count(hash))
516 setAlreadyDone.insert(hash);
519 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
520 if (mi != pwallet->mapWallet.end())
523 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
524 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
526 else if (mapWalletPrev.count(hash))
528 tx = *mapWalletPrev[hash];
530 else if (!fClient && txdb.ReadDiskTx(hash, tx))
536 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
540 int nDepth = tx.SetMerkleBranch();
541 vtxPrev.push_back(tx);
543 if (nDepth < COPY_DEPTH)
544 BOOST_FOREACH(const CTxIn& txin, tx.vin)
545 vWorkQueue.push_back(txin.prevout.hash);
550 reverse(vtxPrev.begin(), vtxPrev.end());
553 bool CWalletTx::WriteToDisk()
555 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
558 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
562 CBlockIndex* pindex = pindexStart;
563 CRITICAL_BLOCK(cs_wallet)
568 block.ReadFromDisk(pindex, true);
569 BOOST_FOREACH(CTransaction& tx, block.vtx)
571 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
574 pindex = pindex->pnext;
580 void CWallet::ReacceptWalletTransactions()
584 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
587 vector<CDiskTxPos> vMissingTx;
588 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
590 CWalletTx& wtx = item.second;
591 if (wtx.IsCoinBase() && wtx.IsSpent(0))
595 bool fUpdated = false;
596 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
598 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
599 if (txindex.vSpent.size() != wtx.vout.size())
601 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
604 for (int i = 0; i < txindex.vSpent.size(); i++)
608 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
612 vMissingTx.push_back(txindex.vSpent[i]);
617 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
624 // Reaccept any txes of ours that aren't already in a block
625 if (!wtx.IsCoinBase())
626 wtx.AcceptWalletTransaction(txdb, false);
629 if (!vMissingTx.empty())
631 // TODO: optimize this to scan just part of the block chain?
632 if (ScanForWalletTransactions(pindexGenesisBlock))
633 fRepeat = true; // Found missing transactions: re-do Reaccept.
638 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
640 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
642 if (!tx.IsCoinBase())
644 uint256 hash = tx.GetHash();
645 if (!txdb.ContainsTx(hash))
646 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
651 uint256 hash = GetHash();
652 if (!txdb.ContainsTx(hash))
654 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
655 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
660 void CWalletTx::RelayWalletTransaction()
663 RelayWalletTransaction(txdb);
666 void CWallet::ResendWalletTransactions()
668 // Do this infrequently and randomly to avoid giving away
669 // that these are our transactions.
670 static int64 nNextTime;
671 if (GetTime() < nNextTime)
673 bool fFirst = (nNextTime == 0);
674 nNextTime = GetTime() + GetRand(30 * 60);
678 // Only do it if there's been a new block since last time
679 static int64 nLastTime;
680 if (nTimeBestReceived < nLastTime)
682 nLastTime = GetTime();
684 // Rebroadcast any of our txes that aren't in a block yet
685 printf("ResendWalletTransactions()\n");
687 CRITICAL_BLOCK(cs_wallet)
689 // Sort them in chronological order
690 multimap<unsigned int, CWalletTx*> mapSorted;
691 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
693 CWalletTx& wtx = item.second;
694 // Don't rebroadcast until it's had plenty of time that
695 // it should have gotten in already by now.
696 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
697 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
699 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
701 CWalletTx& wtx = *item.second;
702 wtx.RelayWalletTransaction(txdb);
712 //////////////////////////////////////////////////////////////////////////////
718 int64 CWallet::GetBalance() const
721 CRITICAL_BLOCK(cs_wallet)
723 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
725 const CWalletTx* pcoin = &(*it).second;
726 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
728 nTotal += pcoin->GetAvailableCredit();
736 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
741 // List of values less than target
742 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
743 coinLowestLarger.first = INT64_MAX;
744 coinLowestLarger.second.first = NULL;
745 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
746 int64 nTotalLower = 0;
748 CRITICAL_BLOCK(cs_wallet)
750 vector<const CWalletTx*> vCoins;
751 vCoins.reserve(mapWallet.size());
752 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
753 vCoins.push_back(&(*it).second);
754 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
756 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
758 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
761 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
764 int nDepth = pcoin->GetDepthInMainChain();
765 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
768 for (int i = 0; i < pcoin->vout.size(); i++)
770 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
773 int64 n = pcoin->vout[i].nValue;
778 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
780 if (n == nTargetValue)
782 setCoinsRet.insert(coin.second);
783 nValueRet += coin.first;
786 else if (n < nTargetValue + CENT)
788 vValue.push_back(coin);
791 else if (n < coinLowestLarger.first)
793 coinLowestLarger = coin;
799 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
801 for (int i = 0; i < vValue.size(); ++i)
803 setCoinsRet.insert(vValue[i].second);
804 nValueRet += vValue[i].first;
809 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
811 if (coinLowestLarger.second.first == NULL)
813 setCoinsRet.insert(coinLowestLarger.second);
814 nValueRet += coinLowestLarger.first;
818 if (nTotalLower >= nTargetValue + CENT)
819 nTargetValue += CENT;
821 // Solve subset sum by stochastic approximation
822 sort(vValue.rbegin(), vValue.rend());
823 vector<char> vfIncluded;
824 vector<char> vfBest(vValue.size(), true);
825 int64 nBest = nTotalLower;
827 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
829 vfIncluded.assign(vValue.size(), false);
831 bool fReachedTarget = false;
832 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
834 for (int i = 0; i < vValue.size(); i++)
836 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
838 nTotal += vValue[i].first;
839 vfIncluded[i] = true;
840 if (nTotal >= nTargetValue)
842 fReachedTarget = true;
848 nTotal -= vValue[i].first;
849 vfIncluded[i] = false;
856 // If the next larger is still closer, return it
857 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
859 setCoinsRet.insert(coinLowestLarger.second);
860 nValueRet += coinLowestLarger.first;
863 for (int i = 0; i < vValue.size(); i++)
866 setCoinsRet.insert(vValue[i].second);
867 nValueRet += vValue[i].first;
871 printf("SelectCoins() best subset: ");
872 for (int i = 0; i < vValue.size(); i++)
874 printf("%s ", FormatMoney(vValue[i].first).c_str());
875 printf("total %s\n", FormatMoney(nBest).c_str());
881 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
883 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
884 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
885 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
891 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
894 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
900 if (vecSend.empty() || nValue < 0)
903 wtxNew.pwallet = this;
905 CRITICAL_BLOCK(cs_main)
906 CRITICAL_BLOCK(cs_wallet)
908 // txdb must be opened before the mapWallet lock
911 nFeeRet = nTransactionFee;
916 wtxNew.fFromMe = true;
918 int64 nTotalValue = nValue + nFeeRet;
919 double dPriority = 0;
920 // vouts to the payees
921 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
922 wtxNew.vout.push_back(CTxOut(s.second, s.first));
924 // Choose coins to use
925 set<pair<const CWalletTx*,unsigned int> > setCoins;
927 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
929 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
931 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
932 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
935 int64 nChange = nValueIn - nValue - nFeeRet;
936 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
937 // or until nChange becomes zero
938 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
940 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
941 nChange -= nMoveToFee;
942 nFeeRet += nMoveToFee;
947 // Note: We use a new key here to keep it from being obvious which side is the change.
948 // The drawback is that by not reusing a previous key, the change may be lost if a
949 // backup is restored, if the backup doesn't have the new private key for the change.
950 // If we reused the old key, it would be possible to add code to look for and
951 // rediscover unknown transactions that were written with keys of ours to recover
952 // post-backup change.
954 // Reserve a new key pair from key pool
955 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
956 // assert(mapKeys.count(vchPubKey));
958 // Fill a vout to ourself, using same address type as the payment
959 CScript scriptChange;
960 if (vecSend[0].first.GetBitcoinAddress().IsValid())
961 scriptChange.SetBitcoinAddress(vchPubKey);
963 scriptChange << vchPubKey << OP_CHECKSIG;
965 // Insert change txn at random position:
966 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
967 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
970 reservekey.ReturnKey();
973 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
974 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
978 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
979 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
983 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
984 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
988 // Check that enough fee is included
989 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
990 bool fAllowFree = CTransaction::AllowFree(dPriority);
991 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
992 if (nFeeRet < max(nPayFee, nMinFee))
994 nFeeRet = max(nPayFee, nMinFee);
998 // Fill vtxPrev by copying from previous transactions vtxPrev
999 wtxNew.AddSupportingTransactions(txdb);
1000 wtxNew.fTimeReceivedIsTxTime = true;
1009 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1011 vector< pair<CScript, int64> > vecSend;
1012 vecSend.push_back(make_pair(scriptPubKey, nValue));
1013 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1016 // Call after CreateTransaction unless you want to abort
1017 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1019 CRITICAL_BLOCK(cs_main)
1020 CRITICAL_BLOCK(cs_wallet)
1022 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1024 // This is only to keep the database open to defeat the auto-flush for the
1025 // duration of this scope. This is the only place where this optimization
1026 // maybe makes sense; please don't do it anywhere else.
1027 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1029 // Take key pair from key pool so it won't be used again
1030 reservekey.KeepKey();
1032 // Add tx to wallet, because if it has change it's also ours,
1033 // otherwise just for transaction history.
1034 AddToWallet(wtxNew);
1036 // Mark old coins as spent
1037 set<CWalletTx*> setCoins;
1038 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1040 CWalletTx &coin = mapWallet[txin.prevout.hash];
1041 coin.pwallet = this;
1042 coin.MarkSpent(txin.prevout.n);
1044 vWalletUpdated.push_back(coin.GetHash());
1051 // Track how many getdata requests our transaction gets
1052 mapRequestCount[wtxNew.GetHash()] = 0;
1055 if (!wtxNew.AcceptToMemoryPool())
1057 // This must not fail. The transaction has already been signed and recorded.
1058 printf("CommitTransaction() : Error: Transaction not valid");
1061 wtxNew.RelayWalletTransaction();
1070 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1072 CReserveKey reservekey(this);
1077 string strError = _("Error: Wallet locked, unable to create transaction ");
1078 printf("SendMoney() : %s", strError.c_str());
1081 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1084 if (nValue + nFeeRequired > GetBalance())
1085 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());
1087 strError = _("Error: Transaction creation failed ");
1088 printf("SendMoney() : %s", strError.c_str());
1092 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1095 if (!CommitTransaction(wtxNew, reservekey))
1096 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.");
1104 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1108 return _("Invalid amount");
1109 if (nValue + nTransactionFee > GetBalance())
1110 return _("Insufficient funds");
1112 // Parse bitcoin address
1113 CScript scriptPubKey;
1114 scriptPubKey.SetBitcoinAddress(address);
1116 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1122 int CWallet::LoadWallet(bool& fFirstRunRet)
1126 fFirstRunRet = false;
1127 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1128 if (nLoadWalletRet == DB_NEED_RESILVER)
1130 if (Resilver(strWalletFile))
1131 CWalletDB(strWalletFile, "r+").WriteSetting("fIsResilvered", true);
1132 nLoadWalletRet = DB_LOAD_OK;
1135 if (nLoadWalletRet != DB_LOAD_OK)
1136 return nLoadWalletRet;
1137 fFirstRunRet = vchDefaultKey.empty();
1139 if (!HaveKey(Hash160(vchDefaultKey)))
1141 // Create new keyUser and set as default key
1142 RandAddSeedPerfmon();
1144 std::vector<unsigned char> newDefaultKey;
1145 if (!GetKeyFromPool(newDefaultKey, false))
1146 return DB_LOAD_FAIL;
1147 SetDefaultKey(newDefaultKey);
1148 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1149 return DB_LOAD_FAIL;
1152 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1157 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1159 mapAddressBook[address] = strName;
1162 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1165 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1167 mapAddressBook.erase(address);
1170 return CWalletDB(strWalletFile).EraseName(address.ToString());
1174 void CWallet::PrintWallet(const CBlock& block)
1176 CRITICAL_BLOCK(cs_wallet)
1178 if (mapWallet.count(block.vtx[0].GetHash()))
1180 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1181 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1187 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1189 CRITICAL_BLOCK(cs_wallet)
1191 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1192 if (mi != mapWallet.end())
1201 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1205 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1208 vchDefaultKey = vchPubKey;
1212 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1214 if (!pwallet->fFileBacked)
1216 strWalletFileOut = pwallet->strWalletFile;
1220 bool CWallet::TopUpKeyPool()
1222 CRITICAL_BLOCK(cs_wallet)
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_wallet)
1254 // Get the oldest key
1255 if(setKeyPool.empty())
1258 CWalletDB walletdb(strWalletFile);
1260 nIndex = *(setKeyPool.begin());
1261 setKeyPool.erase(setKeyPool.begin());
1262 if (!walletdb.ReadPool(nIndex, keypool))
1263 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1264 if (!HaveKey(Hash160(keypool.vchPubKey)))
1265 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1266 assert(!keypool.vchPubKey.empty());
1267 printf("keypool reserve %"PRI64d"\n", nIndex);
1271 void CWallet::KeepKey(int64 nIndex)
1273 // Remove from key pool
1276 CWalletDB walletdb(strWalletFile);
1277 walletdb.ErasePool(nIndex);
1279 printf("keypool keep %"PRI64d"\n", nIndex);
1282 void CWallet::ReturnKey(int64 nIndex)
1284 // Return to key pool
1285 CRITICAL_BLOCK(cs_wallet)
1286 setKeyPool.insert(nIndex);
1287 printf("keypool return %"PRI64d"\n", nIndex);
1290 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1294 CRITICAL_BLOCK(cs_wallet)
1296 ReserveKeyFromKeyPool(nIndex, keypool);
1299 if (fAllowReuse && !vchDefaultKey.empty())
1301 result = vchDefaultKey;
1304 if (IsLocked()) return false;
1305 result = GenerateNewKey();
1309 result = keypool.vchPubKey;
1314 int64 CWallet::GetOldestKeyPoolTime()
1318 ReserveKeyFromKeyPool(nIndex, keypool);
1322 return keypool.nTime;
1325 vector<unsigned char> CReserveKey::GetReservedKey()
1330 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1332 vchPubKey = keypool.vchPubKey;
1335 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1336 vchPubKey = pwallet->vchDefaultKey;
1339 assert(!vchPubKey.empty());
1343 void CReserveKey::KeepKey()
1346 pwallet->KeepKey(nIndex);
1351 void CReserveKey::ReturnKey()
1354 pwallet->ReturnKey(nIndex);