1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
13 //////////////////////////////////////////////////////////////////////////////
18 bool CWallet::AddKey(const CKey& key)
20 if (!CCryptoKeyStore::AddKey(key))
25 return CWalletDB(strWalletFile).WriteKey(key.GetPubKey(), key.GetPrivKey());
29 bool CWallet::AddCryptedKey(const vector<unsigned char> &vchPubKey, const vector<unsigned char> &vchCryptedSecret)
31 if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
35 CRITICAL_BLOCK(cs_wallet)
37 if (pwalletdbEncryption)
38 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
40 return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
45 bool CWallet::Unlock(const string& strWalletPassphrase)
51 CKeyingMaterial vMasterKey;
53 CRITICAL_BLOCK(cs_wallet)
54 BOOST_FOREACH(const MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
56 if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
58 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
60 if (CCryptoKeyStore::Unlock(vMasterKey))
66 bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const string& strNewWalletPassphrase)
68 bool fWasLocked = IsLocked();
70 CRITICAL_BLOCK(cs_wallet)
75 CKeyingMaterial vMasterKey;
76 BOOST_FOREACH(MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
78 if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
80 if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
82 if (CCryptoKeyStore::Unlock(vMasterKey))
84 int64 nStartTime = GetTimeMillis();
85 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
86 pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
88 nStartTime = GetTimeMillis();
89 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
90 pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
92 if (pMasterKey.second.nDeriveIterations < 25000)
93 pMasterKey.second.nDeriveIterations = 25000;
95 printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
97 if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
99 if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey))
101 CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
113 // This class implements an addrIncoming entry that causes pre-0.4
114 // clients to crash on startup if reading a private-key-encrypted wallet.
115 class CCorruptAddress
120 if (nType & SER_DISK)
125 bool CWallet::EncryptWallet(const string& strWalletPassphrase)
130 CKeyingMaterial vMasterKey;
131 RandAddSeedPerfmon();
133 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
134 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
136 CMasterKey kMasterKey;
138 RandAddSeedPerfmon();
139 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
140 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
143 int64 nStartTime = GetTimeMillis();
144 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
145 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
147 nStartTime = GetTimeMillis();
148 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
149 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
151 if (kMasterKey.nDeriveIterations < 25000)
152 kMasterKey.nDeriveIterations = 25000;
154 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
156 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
158 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
161 CRITICAL_BLOCK(cs_wallet)
163 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
166 pwalletdbEncryption = new CWalletDB(strWalletFile);
167 pwalletdbEncryption->TxnBegin();
168 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
171 if (!EncryptKeys(vMasterKey))
174 pwalletdbEncryption->TxnAbort();
175 exit(1); //We now probably have half of our keys encrypted in memory, and half not...die and let the user reload their unencrypted wallet.
180 CCorruptAddress corruptAddress;
181 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
182 if (!pwalletdbEncryption->TxnCommit())
183 exit(1); //We now have keys encrypted in memory, but no on disk...die to avoid confusion and let the user reload their unencrypted wallet.
185 pwalletdbEncryption->Close();
186 pwalletdbEncryption = NULL;
191 // Need to completely rewrite the wallet file; if we don't, bdb might keep
192 // bits of the unencrypted private key in slack space in the database file.
194 CDB::Rewrite(strWalletFile, "\x04pool");
200 void CWallet::WalletUpdateSpent(const CTransaction &tx)
202 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
203 // Update the wallet spent flag if it doesn't know due to wallet.dat being
204 // restored from backup or the user making copies of wallet.dat.
205 CRITICAL_BLOCK(cs_wallet)
207 BOOST_FOREACH(const CTxIn& txin, tx.vin)
209 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
210 if (mi != mapWallet.end())
212 CWalletTx& wtx = (*mi).second;
213 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
215 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
216 wtx.MarkSpent(txin.prevout.n);
218 vWalletUpdated.push_back(txin.prevout.hash);
225 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
227 uint256 hash = wtxIn.GetHash();
228 CRITICAL_BLOCK(cs_wallet)
230 // Inserts only if not already there, returns tx inserted or tx found
231 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
232 CWalletTx& wtx = (*ret.first).second;
234 bool fInsertedNew = ret.second;
236 wtx.nTimeReceived = GetAdjustedTime();
238 bool fUpdated = false;
242 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
244 wtx.hashBlock = wtxIn.hashBlock;
247 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
249 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
250 wtx.nIndex = wtxIn.nIndex;
253 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
255 wtx.fFromMe = wtxIn.fFromMe;
258 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
262 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
265 if (fInsertedNew || fUpdated)
266 if (!wtx.WriteToDisk())
269 // If default receiving address gets used, replace it with a new one
270 CScript scriptDefaultKey;
271 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
272 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
274 if (txout.scriptPubKey == scriptDefaultKey)
276 std::vector<unsigned char> newDefaultKey;
277 if (GetKeyFromPool(newDefaultKey, false))
279 SetDefaultKey(newDefaultKey);
280 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
286 vWalletUpdated.push_back(hash);
288 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
289 WalletUpdateSpent(wtx);
297 // Add a transaction to the wallet, or update it.
298 // pblock is optional, but should be provided if the transaction is known to be in a block.
299 // If fUpdate is true, existing transactions will be updated.
300 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
302 uint256 hash = tx.GetHash();
303 CRITICAL_BLOCK(cs_wallet)
305 bool fExisted = mapWallet.count(hash);
306 if (fExisted && !fUpdate) return false;
307 if (fExisted || IsMine(tx) || IsFromMe(tx))
309 CWalletTx wtx(this,tx);
310 // Get merkle branch if transaction was found in a block
312 wtx.SetMerkleBranch(pblock);
313 return AddToWallet(wtx);
316 WalletUpdateSpent(tx);
321 bool CWallet::EraseFromWallet(uint256 hash)
325 CRITICAL_BLOCK(cs_wallet)
327 if (mapWallet.erase(hash))
328 CWalletDB(strWalletFile).EraseTx(hash);
334 bool CWallet::IsMine(const CTxIn &txin) const
336 CRITICAL_BLOCK(cs_wallet)
338 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
339 if (mi != mapWallet.end())
341 const CWalletTx& prev = (*mi).second;
342 if (txin.prevout.n < prev.vout.size())
343 if (IsMine(prev.vout[txin.prevout.n]))
350 int64 CWallet::GetDebit(const CTxIn &txin) const
352 CRITICAL_BLOCK(cs_wallet)
354 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
355 if (mi != mapWallet.end())
357 const CWalletTx& prev = (*mi).second;
358 if (txin.prevout.n < prev.vout.size())
359 if (IsMine(prev.vout[txin.prevout.n]))
360 return prev.vout[txin.prevout.n].nValue;
366 int64 CWalletTx::GetTxTime() const
368 return nTimeReceived;
371 int CWalletTx::GetRequestCount() const
373 // Returns -1 if it wasn't being tracked
375 CRITICAL_BLOCK(pwallet->cs_wallet)
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<CBitcoinAddress, int64> >& listReceived,
411 list<pair<CBitcoinAddress, 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)
439 CBitcoinAddress address;
440 vector<unsigned char> vchPubKey;
441 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
443 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
444 this->GetHash().ToString().c_str());
445 address = " unknown ";
448 // Don't report 'change' txouts
449 if (nDebit > 0 && pwallet->IsChange(txout))
453 listSent.push_back(make_pair(address, txout.nValue));
455 if (pwallet->IsMine(txout))
456 listReceived.push_back(make_pair(address, txout.nValue));
461 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
462 int64& nSent, int64& nFee) const
464 nGenerated = nReceived = nSent = nFee = 0;
466 int64 allGeneratedImmature, allGeneratedMature, allFee;
467 allGeneratedImmature = allGeneratedMature = allFee = 0;
468 string strSentAccount;
469 list<pair<CBitcoinAddress, int64> > listReceived;
470 list<pair<CBitcoinAddress, int64> > listSent;
471 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
473 if (strAccount == "")
474 nGenerated = allGeneratedMature;
475 if (strAccount == strSentAccount)
477 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
481 CRITICAL_BLOCK(pwallet->cs_wallet)
483 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
485 if (pwallet->mapAddressBook.count(r.first))
487 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
488 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
489 nReceived += r.second;
491 else if (strAccount.empty())
493 nReceived += r.second;
499 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
503 const int COPY_DEPTH = 3;
504 if (SetMerkleBranch() < COPY_DEPTH)
506 vector<uint256> vWorkQueue;
507 BOOST_FOREACH(const CTxIn& txin, vin)
508 vWorkQueue.push_back(txin.prevout.hash);
510 // This critsect is OK because txdb is already open
511 CRITICAL_BLOCK(pwallet->cs_wallet)
513 map<uint256, const CMerkleTx*> mapWalletPrev;
514 set<uint256> setAlreadyDone;
515 for (int i = 0; i < vWorkQueue.size(); i++)
517 uint256 hash = vWorkQueue[i];
518 if (setAlreadyDone.count(hash))
520 setAlreadyDone.insert(hash);
523 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
524 if (mi != pwallet->mapWallet.end())
527 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
528 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
530 else if (mapWalletPrev.count(hash))
532 tx = *mapWalletPrev[hash];
534 else if (!fClient && txdb.ReadDiskTx(hash, tx))
540 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
544 int nDepth = tx.SetMerkleBranch();
545 vtxPrev.push_back(tx);
547 if (nDepth < COPY_DEPTH)
548 BOOST_FOREACH(const CTxIn& txin, tx.vin)
549 vWorkQueue.push_back(txin.prevout.hash);
554 reverse(vtxPrev.begin(), vtxPrev.end());
557 bool CWalletTx::WriteToDisk()
559 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
562 // Scan the block chain (starting in pindexStart) for transactions
563 // from or to us. If fUpdate is true, found transactions that already
564 // exist in the wallet will be updated.
565 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
569 CBlockIndex* pindex = pindexStart;
570 CRITICAL_BLOCK(cs_wallet)
575 block.ReadFromDisk(pindex, true);
576 BOOST_FOREACH(CTransaction& tx, block.vtx)
578 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
581 pindex = pindex->pnext;
587 void CWallet::ReacceptWalletTransactions()
591 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
594 vector<CDiskTxPos> vMissingTx;
595 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
597 CWalletTx& wtx = item.second;
598 if (wtx.IsCoinBase() && wtx.IsSpent(0))
602 bool fUpdated = false;
603 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
605 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
606 if (txindex.vSpent.size() != wtx.vout.size())
608 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
611 for (int i = 0; i < txindex.vSpent.size(); i++)
615 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
619 vMissingTx.push_back(txindex.vSpent[i]);
624 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
631 // Reaccept any txes of ours that aren't already in a block
632 if (!wtx.IsCoinBase())
633 wtx.AcceptWalletTransaction(txdb, false);
636 if (!vMissingTx.empty())
638 // TODO: optimize this to scan just part of the block chain?
639 if (ScanForWalletTransactions(pindexGenesisBlock))
640 fRepeat = true; // Found missing transactions: re-do Reaccept.
645 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
647 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
649 if (!tx.IsCoinBase())
651 uint256 hash = tx.GetHash();
652 if (!txdb.ContainsTx(hash))
653 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
658 uint256 hash = GetHash();
659 if (!txdb.ContainsTx(hash))
661 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
662 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
667 void CWalletTx::RelayWalletTransaction()
670 RelayWalletTransaction(txdb);
673 void CWallet::ResendWalletTransactions()
675 // Do this infrequently and randomly to avoid giving away
676 // that these are our transactions.
677 static int64 nNextTime;
678 if (GetTime() < nNextTime)
680 bool fFirst = (nNextTime == 0);
681 nNextTime = GetTime() + GetRand(30 * 60);
685 // Only do it if there's been a new block since last time
686 static int64 nLastTime;
687 if (nTimeBestReceived < nLastTime)
689 nLastTime = GetTime();
691 // Rebroadcast any of our txes that aren't in a block yet
692 printf("ResendWalletTransactions()\n");
694 CRITICAL_BLOCK(cs_wallet)
696 // Sort them in chronological order
697 multimap<unsigned int, CWalletTx*> mapSorted;
698 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
700 CWalletTx& wtx = item.second;
701 // Don't rebroadcast until it's had plenty of time that
702 // it should have gotten in already by now.
703 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
704 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
706 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
708 CWalletTx& wtx = *item.second;
709 wtx.RelayWalletTransaction(txdb);
719 //////////////////////////////////////////////////////////////////////////////
725 int64 CWallet::GetBalance() const
728 CRITICAL_BLOCK(cs_wallet)
730 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
732 const CWalletTx* pcoin = &(*it).second;
733 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
735 nTotal += pcoin->GetAvailableCredit();
742 int64 CWallet::GetUnconfirmedBalance() const
745 CRITICAL_BLOCK(cs_wallet)
747 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
749 const CWalletTx* pcoin = &(*it).second;
750 if (pcoin->IsFinal() && pcoin->IsConfirmed())
752 nTotal += pcoin->GetAvailableCredit();
758 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
763 // List of values less than target
764 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
765 coinLowestLarger.first = INT64_MAX;
766 coinLowestLarger.second.first = NULL;
767 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
768 int64 nTotalLower = 0;
770 CRITICAL_BLOCK(cs_wallet)
772 vector<const CWalletTx*> vCoins;
773 vCoins.reserve(mapWallet.size());
774 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
775 vCoins.push_back(&(*it).second);
776 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
778 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
780 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
783 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
786 int nDepth = pcoin->GetDepthInMainChain();
787 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
790 for (int i = 0; i < pcoin->vout.size(); i++)
792 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
795 int64 n = pcoin->vout[i].nValue;
800 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
802 if (n == nTargetValue)
804 setCoinsRet.insert(coin.second);
805 nValueRet += coin.first;
808 else if (n < nTargetValue + CENT)
810 vValue.push_back(coin);
813 else if (n < coinLowestLarger.first)
815 coinLowestLarger = coin;
821 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
823 for (int i = 0; i < vValue.size(); ++i)
825 setCoinsRet.insert(vValue[i].second);
826 nValueRet += vValue[i].first;
831 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
833 if (coinLowestLarger.second.first == NULL)
835 setCoinsRet.insert(coinLowestLarger.second);
836 nValueRet += coinLowestLarger.first;
840 if (nTotalLower >= nTargetValue + CENT)
841 nTargetValue += CENT;
843 // Solve subset sum by stochastic approximation
844 sort(vValue.rbegin(), vValue.rend());
845 vector<char> vfIncluded;
846 vector<char> vfBest(vValue.size(), true);
847 int64 nBest = nTotalLower;
849 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
851 vfIncluded.assign(vValue.size(), false);
853 bool fReachedTarget = false;
854 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
856 for (int i = 0; i < vValue.size(); i++)
858 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
860 nTotal += vValue[i].first;
861 vfIncluded[i] = true;
862 if (nTotal >= nTargetValue)
864 fReachedTarget = true;
870 nTotal -= vValue[i].first;
871 vfIncluded[i] = false;
878 // If the next larger is still closer, return it
879 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
881 setCoinsRet.insert(coinLowestLarger.second);
882 nValueRet += coinLowestLarger.first;
885 for (int i = 0; i < vValue.size(); i++)
888 setCoinsRet.insert(vValue[i].second);
889 nValueRet += vValue[i].first;
893 printf("SelectCoins() best subset: ");
894 for (int i = 0; i < vValue.size(); i++)
896 printf("%s ", FormatMoney(vValue[i].first).c_str());
897 printf("total %s\n", FormatMoney(nBest).c_str());
903 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
905 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
906 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
907 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
913 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
916 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
922 if (vecSend.empty() || nValue < 0)
925 wtxNew.pwallet = this;
927 CRITICAL_BLOCK(cs_main)
928 CRITICAL_BLOCK(cs_wallet)
930 // txdb must be opened before the mapWallet lock
933 nFeeRet = nTransactionFee;
938 wtxNew.fFromMe = true;
940 int64 nTotalValue = nValue + nFeeRet;
941 double dPriority = 0;
942 // vouts to the payees
943 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
944 wtxNew.vout.push_back(CTxOut(s.second, s.first));
946 // Choose coins to use
947 set<pair<const CWalletTx*,unsigned int> > setCoins;
949 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
951 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
953 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
954 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
957 int64 nChange = nValueIn - nValue - nFeeRet;
958 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
959 // or until nChange becomes zero
960 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
962 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
963 nChange -= nMoveToFee;
964 nFeeRet += nMoveToFee;
969 // Note: We use a new key here to keep it from being obvious which side is the change.
970 // The drawback is that by not reusing a previous key, the change may be lost if a
971 // backup is restored, if the backup doesn't have the new private key for the change.
972 // If we reused the old key, it would be possible to add code to look for and
973 // rediscover unknown transactions that were written with keys of ours to recover
974 // post-backup change.
976 // Reserve a new key pair from key pool
977 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
978 // assert(mapKeys.count(vchPubKey));
980 // Fill a vout to ourself, using same address type as the payment
981 CScript scriptChange;
982 if (vecSend[0].first.GetBitcoinAddress().IsValid())
983 scriptChange.SetBitcoinAddress(vchPubKey);
985 scriptChange << vchPubKey << OP_CHECKSIG;
987 // Insert change txn at random position:
988 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
989 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
992 reservekey.ReturnKey();
995 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
996 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
1000 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
1001 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1005 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1006 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1008 dPriority /= nBytes;
1010 // Check that enough fee is included
1011 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1012 bool fAllowFree = CTransaction::AllowFree(dPriority);
1013 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1014 if (nFeeRet < max(nPayFee, nMinFee))
1016 nFeeRet = max(nPayFee, nMinFee);
1020 // Fill vtxPrev by copying from previous transactions vtxPrev
1021 wtxNew.AddSupportingTransactions(txdb);
1022 wtxNew.fTimeReceivedIsTxTime = true;
1031 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1033 vector< pair<CScript, int64> > vecSend;
1034 vecSend.push_back(make_pair(scriptPubKey, nValue));
1035 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1038 // Call after CreateTransaction unless you want to abort
1039 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1041 CRITICAL_BLOCK(cs_main)
1042 CRITICAL_BLOCK(cs_wallet)
1044 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1046 // This is only to keep the database open to defeat the auto-flush for the
1047 // duration of this scope. This is the only place where this optimization
1048 // maybe makes sense; please don't do it anywhere else.
1049 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1051 // Take key pair from key pool so it won't be used again
1052 reservekey.KeepKey();
1054 // Add tx to wallet, because if it has change it's also ours,
1055 // otherwise just for transaction history.
1056 AddToWallet(wtxNew);
1058 // Mark old coins as spent
1059 set<CWalletTx*> setCoins;
1060 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1062 CWalletTx &coin = mapWallet[txin.prevout.hash];
1063 coin.pwallet = this;
1064 coin.MarkSpent(txin.prevout.n);
1066 vWalletUpdated.push_back(coin.GetHash());
1073 // Track how many getdata requests our transaction gets
1074 mapRequestCount[wtxNew.GetHash()] = 0;
1077 if (!wtxNew.AcceptToMemoryPool())
1079 // This must not fail. The transaction has already been signed and recorded.
1080 printf("CommitTransaction() : Error: Transaction not valid");
1083 wtxNew.RelayWalletTransaction();
1092 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1094 CReserveKey reservekey(this);
1099 string strError = _("Error: Wallet locked, unable to create transaction ");
1100 printf("SendMoney() : %s", strError.c_str());
1103 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1106 if (nValue + nFeeRequired > GetBalance())
1107 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());
1109 strError = _("Error: Transaction creation failed ");
1110 printf("SendMoney() : %s", strError.c_str());
1114 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1117 if (!CommitTransaction(wtxNew, reservekey))
1118 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.");
1126 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1130 return _("Invalid amount");
1131 if (nValue + nTransactionFee > GetBalance())
1132 return _("Insufficient funds");
1134 // Parse bitcoin address
1135 CScript scriptPubKey;
1136 scriptPubKey.SetBitcoinAddress(address);
1138 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1144 int CWallet::LoadWallet(bool& fFirstRunRet)
1148 fFirstRunRet = false;
1149 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1150 if (nLoadWalletRet == DB_NEED_REWRITE)
1152 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1155 // Note: can't top-up keypool here, because wallet is locked.
1156 // User will be prompted to unlock wallet the next operation
1157 // the requires a new key.
1159 nLoadWalletRet = DB_NEED_REWRITE;
1162 if (nLoadWalletRet != DB_LOAD_OK)
1163 return nLoadWalletRet;
1164 fFirstRunRet = vchDefaultKey.empty();
1166 if (!HaveKey(Hash160(vchDefaultKey)))
1168 // Create new keyUser and set as default key
1169 RandAddSeedPerfmon();
1171 std::vector<unsigned char> newDefaultKey;
1172 if (!GetKeyFromPool(newDefaultKey, false))
1173 return DB_LOAD_FAIL;
1174 SetDefaultKey(newDefaultKey);
1175 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1176 return DB_LOAD_FAIL;
1179 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1184 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1186 mapAddressBook[address] = strName;
1189 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1192 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1194 mapAddressBook.erase(address);
1197 return CWalletDB(strWalletFile).EraseName(address.ToString());
1201 void CWallet::PrintWallet(const CBlock& block)
1203 CRITICAL_BLOCK(cs_wallet)
1205 if (mapWallet.count(block.vtx[0].GetHash()))
1207 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1208 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1214 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1216 CRITICAL_BLOCK(cs_wallet)
1218 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1219 if (mi != mapWallet.end())
1228 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1232 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1235 vchDefaultKey = vchPubKey;
1239 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1241 if (!pwallet->fFileBacked)
1243 strWalletFileOut = pwallet->strWalletFile;
1247 bool CWallet::TopUpKeyPool()
1249 CRITICAL_BLOCK(cs_wallet)
1254 CWalletDB walletdb(strWalletFile);
1257 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1258 while (setKeyPool.size() < nTargetSize+1)
1261 if (!setKeyPool.empty())
1262 nEnd = *(--setKeyPool.end()) + 1;
1263 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1264 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1265 setKeyPool.insert(nEnd);
1266 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1272 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1275 keypool.vchPubKey.clear();
1276 CRITICAL_BLOCK(cs_wallet)
1281 // Get the oldest key
1282 if(setKeyPool.empty())
1285 CWalletDB walletdb(strWalletFile);
1287 nIndex = *(setKeyPool.begin());
1288 setKeyPool.erase(setKeyPool.begin());
1289 if (!walletdb.ReadPool(nIndex, keypool))
1290 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1291 if (!HaveKey(Hash160(keypool.vchPubKey)))
1292 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1293 assert(!keypool.vchPubKey.empty());
1294 printf("keypool reserve %"PRI64d"\n", nIndex);
1298 void CWallet::KeepKey(int64 nIndex)
1300 // Remove from key pool
1303 CWalletDB walletdb(strWalletFile);
1304 walletdb.ErasePool(nIndex);
1306 printf("keypool keep %"PRI64d"\n", nIndex);
1309 void CWallet::ReturnKey(int64 nIndex)
1311 // Return to key pool
1312 CRITICAL_BLOCK(cs_wallet)
1313 setKeyPool.insert(nIndex);
1314 printf("keypool return %"PRI64d"\n", nIndex);
1317 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1321 CRITICAL_BLOCK(cs_wallet)
1323 ReserveKeyFromKeyPool(nIndex, keypool);
1326 if (fAllowReuse && !vchDefaultKey.empty())
1328 result = vchDefaultKey;
1331 if (IsLocked()) return false;
1332 result = GenerateNewKey();
1336 result = keypool.vchPubKey;
1341 int64 CWallet::GetOldestKeyPoolTime()
1345 ReserveKeyFromKeyPool(nIndex, keypool);
1349 return keypool.nTime;
1352 vector<unsigned char> CReserveKey::GetReservedKey()
1357 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1359 vchPubKey = keypool.vchPubKey;
1362 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1363 vchPubKey = pwallet->vchDefaultKey;
1366 assert(!vchPubKey.empty());
1370 void CReserveKey::KeepKey()
1373 pwallet->KeepKey(nIndex);
1378 void CReserveKey::ReturnKey()
1381 pwallet->ReturnKey(nIndex);