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 SecureString& 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 SecureString& strOldWalletPassphrase, const SecureString& 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 SecureString& 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;
190 Unlock(strWalletPassphrase);
194 // Need to completely rewrite the wallet file; if we don't, bdb might keep
195 // bits of the unencrypted private key in slack space in the database file.
196 CDB::Rewrite(strWalletFile);
202 void CWallet::WalletUpdateSpent(const CTransaction &tx)
204 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
205 // Update the wallet spent flag if it doesn't know due to wallet.dat being
206 // restored from backup or the user making copies of wallet.dat.
207 CRITICAL_BLOCK(cs_wallet)
209 BOOST_FOREACH(const CTxIn& txin, tx.vin)
211 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
212 if (mi != mapWallet.end())
214 CWalletTx& wtx = (*mi).second;
215 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
217 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
218 wtx.MarkSpent(txin.prevout.n);
220 vWalletUpdated.push_back(txin.prevout.hash);
227 void CWallet::MarkDirty()
229 CRITICAL_BLOCK(cs_wallet)
231 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
232 item.second.MarkDirty();
236 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
238 uint256 hash = wtxIn.GetHash();
239 CRITICAL_BLOCK(cs_wallet)
241 // Inserts only if not already there, returns tx inserted or tx found
242 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
243 CWalletTx& wtx = (*ret.first).second;
244 wtx.BindWallet(this);
245 bool fInsertedNew = ret.second;
247 wtx.nTimeReceived = GetAdjustedTime();
249 bool fUpdated = false;
253 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
255 wtx.hashBlock = wtxIn.hashBlock;
258 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
260 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
261 wtx.nIndex = wtxIn.nIndex;
264 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
266 wtx.fFromMe = wtxIn.fFromMe;
269 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
273 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
276 if (fInsertedNew || fUpdated)
277 if (!wtx.WriteToDisk())
280 // If default receiving address gets used, replace it with a new one
281 CScript scriptDefaultKey;
282 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
283 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
285 if (txout.scriptPubKey == scriptDefaultKey)
287 std::vector<unsigned char> newDefaultKey;
288 if (GetKeyFromPool(newDefaultKey, false))
290 SetDefaultKey(newDefaultKey);
291 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
297 vWalletUpdated.push_back(hash);
299 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
300 WalletUpdateSpent(wtx);
308 // Add a transaction to the wallet, or update it.
309 // pblock is optional, but should be provided if the transaction is known to be in a block.
310 // If fUpdate is true, existing transactions will be updated.
311 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate, bool fFindBlock)
313 uint256 hash = tx.GetHash();
314 CRITICAL_BLOCK(cs_wallet)
316 bool fExisted = mapWallet.count(hash);
317 if (fExisted && !fUpdate) return false;
318 if (fExisted || IsMine(tx) || IsFromMe(tx))
320 CWalletTx wtx(this,tx);
321 // Get merkle branch if transaction was found in a block
323 wtx.SetMerkleBranch(pblock);
324 return AddToWallet(wtx);
327 WalletUpdateSpent(tx);
332 bool CWallet::EraseFromWallet(uint256 hash)
336 CRITICAL_BLOCK(cs_wallet)
338 if (mapWallet.erase(hash))
339 CWalletDB(strWalletFile).EraseTx(hash);
345 bool CWallet::IsMine(const CTxIn &txin) const
347 CRITICAL_BLOCK(cs_wallet)
349 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
350 if (mi != mapWallet.end())
352 const CWalletTx& prev = (*mi).second;
353 if (txin.prevout.n < prev.vout.size())
354 if (IsMine(prev.vout[txin.prevout.n]))
361 int64 CWallet::GetDebit(const CTxIn &txin) const
363 CRITICAL_BLOCK(cs_wallet)
365 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
366 if (mi != mapWallet.end())
368 const CWalletTx& prev = (*mi).second;
369 if (txin.prevout.n < prev.vout.size())
370 if (IsMine(prev.vout[txin.prevout.n]))
371 return prev.vout[txin.prevout.n].nValue;
377 int64 CWalletTx::GetTxTime() const
379 return nTimeReceived;
382 int CWalletTx::GetRequestCount() const
384 // Returns -1 if it wasn't being tracked
386 CRITICAL_BLOCK(pwallet->cs_wallet)
393 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
394 if (mi != pwallet->mapRequestCount.end())
395 nRequests = (*mi).second;
400 // Did anyone request this transaction?
401 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
402 if (mi != pwallet->mapRequestCount.end())
404 nRequests = (*mi).second;
406 // How about the block it's in?
407 if (nRequests == 0 && hashBlock != 0)
409 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
410 if (mi != pwallet->mapRequestCount.end())
411 nRequests = (*mi).second;
413 nRequests = 1; // If it's in someone else's block it must have got out
421 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
422 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
424 nGeneratedImmature = nGeneratedMature = nFee = 0;
425 listReceived.clear();
427 strSentAccount = strFromAccount;
431 if (GetBlocksToMaturity() > 0)
432 nGeneratedImmature = pwallet->GetCredit(*this);
434 nGeneratedMature = GetCredit();
439 int64 nDebit = GetDebit();
440 if (nDebit > 0) // debit>0 means we signed/sent this transaction
442 int64 nValueOut = GetValueOut();
443 nFee = nDebit - nValueOut;
446 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
447 // but non-standard clients might (so return a list of address/amount pairs)
448 BOOST_FOREACH(const CTxOut& txout, vout)
450 CBitcoinAddress address;
451 vector<unsigned char> vchPubKey;
452 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
454 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
455 this->GetHash().ToString().c_str());
456 address = " unknown ";
459 // Don't report 'change' txouts
460 if (nDebit > 0 && pwallet->IsChange(txout))
464 listSent.push_back(make_pair(address, txout.nValue));
466 if (pwallet->IsMine(txout))
467 listReceived.push_back(make_pair(address, txout.nValue));
472 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
473 int64& nSent, int64& nFee) const
475 nGenerated = nReceived = nSent = nFee = 0;
477 int64 allGeneratedImmature, allGeneratedMature, allFee;
478 allGeneratedImmature = allGeneratedMature = allFee = 0;
479 string strSentAccount;
480 list<pair<CBitcoinAddress, int64> > listReceived;
481 list<pair<CBitcoinAddress, int64> > listSent;
482 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
484 if (strAccount == "")
485 nGenerated = allGeneratedMature;
486 if (strAccount == strSentAccount)
488 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
492 CRITICAL_BLOCK(pwallet->cs_wallet)
494 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
496 if (pwallet->mapAddressBook.count(r.first))
498 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
499 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
500 nReceived += r.second;
502 else if (strAccount.empty())
504 nReceived += r.second;
510 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
514 const int COPY_DEPTH = 3;
515 if (SetMerkleBranch() < COPY_DEPTH)
517 vector<uint256> vWorkQueue;
518 BOOST_FOREACH(const CTxIn& txin, vin)
519 vWorkQueue.push_back(txin.prevout.hash);
521 // This critsect is OK because txdb is already open
522 CRITICAL_BLOCK(pwallet->cs_wallet)
524 map<uint256, const CMerkleTx*> mapWalletPrev;
525 set<uint256> setAlreadyDone;
526 for (int i = 0; i < vWorkQueue.size(); i++)
528 uint256 hash = vWorkQueue[i];
529 if (setAlreadyDone.count(hash))
531 setAlreadyDone.insert(hash);
534 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
535 if (mi != pwallet->mapWallet.end())
538 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
539 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
541 else if (mapWalletPrev.count(hash))
543 tx = *mapWalletPrev[hash];
545 else if (!fClient && txdb.ReadDiskTx(hash, tx))
551 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
555 int nDepth = tx.SetMerkleBranch();
556 vtxPrev.push_back(tx);
558 if (nDepth < COPY_DEPTH)
559 BOOST_FOREACH(const CTxIn& txin, tx.vin)
560 vWorkQueue.push_back(txin.prevout.hash);
565 reverse(vtxPrev.begin(), vtxPrev.end());
568 bool CWalletTx::WriteToDisk()
570 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
573 // Scan the block chain (starting in pindexStart) for transactions
574 // from or to us. If fUpdate is true, found transactions that already
575 // exist in the wallet will be updated.
576 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
580 CBlockIndex* pindex = pindexStart;
581 CRITICAL_BLOCK(cs_wallet)
586 block.ReadFromDisk(pindex, true);
587 BOOST_FOREACH(CTransaction& tx, block.vtx)
589 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
592 pindex = pindex->pnext;
598 int CWallet::ScanForWalletTransaction(const uint256& hashTx)
601 tx.ReadFromDisk(COutPoint(hashTx, 0));
602 if (AddToWalletIfInvolvingMe(tx, NULL, true, true))
607 void CWallet::ReacceptWalletTransactions()
611 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
614 vector<CDiskTxPos> vMissingTx;
615 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
617 CWalletTx& wtx = item.second;
618 if (wtx.IsCoinBase() && wtx.IsSpent(0))
622 bool fUpdated = false;
623 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
625 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
626 if (txindex.vSpent.size() != wtx.vout.size())
628 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
631 for (int i = 0; i < txindex.vSpent.size(); i++)
635 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
639 vMissingTx.push_back(txindex.vSpent[i]);
644 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
651 // Reaccept any txes of ours that aren't already in a block
652 if (!wtx.IsCoinBase())
653 wtx.AcceptWalletTransaction(txdb, false);
656 if (!vMissingTx.empty())
658 // TODO: optimize this to scan just part of the block chain?
659 if (ScanForWalletTransactions(pindexGenesisBlock))
660 fRepeat = true; // Found missing transactions: re-do Reaccept.
665 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
667 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
669 if (!tx.IsCoinBase())
671 uint256 hash = tx.GetHash();
672 if (!txdb.ContainsTx(hash))
673 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
678 uint256 hash = GetHash();
679 if (!txdb.ContainsTx(hash))
681 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
682 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
687 void CWalletTx::RelayWalletTransaction()
690 RelayWalletTransaction(txdb);
693 void CWallet::ResendWalletTransactions()
695 // Do this infrequently and randomly to avoid giving away
696 // that these are our transactions.
697 static int64 nNextTime;
698 if (GetTime() < nNextTime)
700 bool fFirst = (nNextTime == 0);
701 nNextTime = GetTime() + GetRand(30 * 60);
705 // Only do it if there's been a new block since last time
706 static int64 nLastTime;
707 if (nTimeBestReceived < nLastTime)
709 nLastTime = GetTime();
711 // Rebroadcast any of our txes that aren't in a block yet
712 printf("ResendWalletTransactions()\n");
714 CRITICAL_BLOCK(cs_wallet)
716 // Sort them in chronological order
717 multimap<unsigned int, CWalletTx*> mapSorted;
718 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
720 CWalletTx& wtx = item.second;
721 // Don't rebroadcast until it's had plenty of time that
722 // it should have gotten in already by now.
723 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
724 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
726 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
728 CWalletTx& wtx = *item.second;
729 wtx.RelayWalletTransaction(txdb);
739 //////////////////////////////////////////////////////////////////////////////
745 int64 CWallet::GetBalance() const
748 CRITICAL_BLOCK(cs_wallet)
750 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
752 const CWalletTx* pcoin = &(*it).second;
753 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
755 nTotal += pcoin->GetAvailableCredit();
762 int64 CWallet::GetUnconfirmedBalance() const
765 CRITICAL_BLOCK(cs_wallet)
767 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
769 const CWalletTx* pcoin = &(*it).second;
770 if (pcoin->IsFinal() && pcoin->IsConfirmed())
772 nTotal += pcoin->GetAvailableCredit();
778 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
783 // List of values less than target
784 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
785 coinLowestLarger.first = INT64_MAX;
786 coinLowestLarger.second.first = NULL;
787 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
788 int64 nTotalLower = 0;
790 CRITICAL_BLOCK(cs_wallet)
792 vector<const CWalletTx*> vCoins;
793 vCoins.reserve(mapWallet.size());
794 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
795 vCoins.push_back(&(*it).second);
796 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
798 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
800 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
803 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
806 int nDepth = pcoin->GetDepthInMainChain();
807 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
810 for (int i = 0; i < pcoin->vout.size(); i++)
812 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
815 int64 n = pcoin->vout[i].nValue;
820 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
822 if (n == nTargetValue)
824 setCoinsRet.insert(coin.second);
825 nValueRet += coin.first;
828 else if (n < nTargetValue + CENT)
830 vValue.push_back(coin);
833 else if (n < coinLowestLarger.first)
835 coinLowestLarger = coin;
841 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
843 for (int i = 0; i < vValue.size(); ++i)
845 setCoinsRet.insert(vValue[i].second);
846 nValueRet += vValue[i].first;
851 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
853 if (coinLowestLarger.second.first == NULL)
855 setCoinsRet.insert(coinLowestLarger.second);
856 nValueRet += coinLowestLarger.first;
860 if (nTotalLower >= nTargetValue + CENT)
861 nTargetValue += CENT;
863 // Solve subset sum by stochastic approximation
864 sort(vValue.rbegin(), vValue.rend());
865 vector<char> vfIncluded;
866 vector<char> vfBest(vValue.size(), true);
867 int64 nBest = nTotalLower;
869 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
871 vfIncluded.assign(vValue.size(), false);
873 bool fReachedTarget = false;
874 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
876 for (int i = 0; i < vValue.size(); i++)
878 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
880 nTotal += vValue[i].first;
881 vfIncluded[i] = true;
882 if (nTotal >= nTargetValue)
884 fReachedTarget = true;
890 nTotal -= vValue[i].first;
891 vfIncluded[i] = false;
898 // If the next larger is still closer, return it
899 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
901 setCoinsRet.insert(coinLowestLarger.second);
902 nValueRet += coinLowestLarger.first;
905 for (int i = 0; i < vValue.size(); i++)
908 setCoinsRet.insert(vValue[i].second);
909 nValueRet += vValue[i].first;
913 printf("SelectCoins() best subset: ");
914 for (int i = 0; i < vValue.size(); i++)
916 printf("%s ", FormatMoney(vValue[i].first).c_str());
917 printf("total %s\n", FormatMoney(nBest).c_str());
923 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
925 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
926 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
927 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
933 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
936 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
942 if (vecSend.empty() || nValue < 0)
945 wtxNew.BindWallet(this);
947 CRITICAL_BLOCK(cs_main)
948 CRITICAL_BLOCK(cs_wallet)
950 // txdb must be opened before the mapWallet lock
953 nFeeRet = nTransactionFee;
958 wtxNew.fFromMe = true;
960 int64 nTotalValue = nValue + nFeeRet;
961 double dPriority = 0;
962 // vouts to the payees
963 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
964 wtxNew.vout.push_back(CTxOut(s.second, s.first));
966 // Choose coins to use
967 set<pair<const CWalletTx*,unsigned int> > setCoins;
969 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
971 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
973 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
974 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
977 int64 nChange = nValueIn - nValue - nFeeRet;
978 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
979 // or until nChange becomes zero
980 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
982 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
983 nChange -= nMoveToFee;
984 nFeeRet += nMoveToFee;
989 // Note: We use a new key here to keep it from being obvious which side is the change.
990 // The drawback is that by not reusing a previous key, the change may be lost if a
991 // backup is restored, if the backup doesn't have the new private key for the change.
992 // If we reused the old key, it would be possible to add code to look for and
993 // rediscover unknown transactions that were written with keys of ours to recover
994 // post-backup change.
996 // Reserve a new key pair from key pool
997 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
998 // assert(mapKeys.count(vchPubKey));
1000 // Fill a vout to ourself
1001 // TODO: pass in scriptChange instead of reservekey so
1002 // change transaction isn't always pay-to-bitcoin-address
1003 CScript scriptChange;
1004 scriptChange.SetBitcoinAddress(vchPubKey);
1006 // Insert change txn at random position:
1007 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
1008 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
1011 reservekey.ReturnKey();
1014 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
1015 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
1019 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
1020 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1024 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1025 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1027 dPriority /= nBytes;
1029 // Check that enough fee is included
1030 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1031 bool fAllowFree = CTransaction::AllowFree(dPriority);
1032 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1033 if (nFeeRet < max(nPayFee, nMinFee))
1035 nFeeRet = max(nPayFee, nMinFee);
1039 // Fill vtxPrev by copying from previous transactions vtxPrev
1040 wtxNew.AddSupportingTransactions(txdb);
1041 wtxNew.fTimeReceivedIsTxTime = true;
1050 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1052 vector< pair<CScript, int64> > vecSend;
1053 vecSend.push_back(make_pair(scriptPubKey, nValue));
1054 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1057 // Call after CreateTransaction unless you want to abort
1058 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1060 CRITICAL_BLOCK(cs_main)
1061 CRITICAL_BLOCK(cs_wallet)
1063 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1065 // This is only to keep the database open to defeat the auto-flush for the
1066 // duration of this scope. This is the only place where this optimization
1067 // maybe makes sense; please don't do it anywhere else.
1068 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1070 // Take key pair from key pool so it won't be used again
1071 reservekey.KeepKey();
1073 // Add tx to wallet, because if it has change it's also ours,
1074 // otherwise just for transaction history.
1075 AddToWallet(wtxNew);
1077 // Mark old coins as spent
1078 set<CWalletTx*> setCoins;
1079 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1081 CWalletTx &coin = mapWallet[txin.prevout.hash];
1082 coin.BindWallet(this);
1083 coin.MarkSpent(txin.prevout.n);
1085 vWalletUpdated.push_back(coin.GetHash());
1092 // Track how many getdata requests our transaction gets
1093 mapRequestCount[wtxNew.GetHash()] = 0;
1096 if (!wtxNew.AcceptToMemoryPool())
1098 // This must not fail. The transaction has already been signed and recorded.
1099 printf("CommitTransaction() : Error: Transaction not valid");
1102 wtxNew.RelayWalletTransaction();
1111 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1113 CReserveKey reservekey(this);
1118 string strError = _("Error: Wallet locked, unable to create transaction ");
1119 printf("SendMoney() : %s", strError.c_str());
1122 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1125 if (nValue + nFeeRequired > GetBalance())
1126 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());
1128 strError = _("Error: Transaction creation failed ");
1129 printf("SendMoney() : %s", strError.c_str());
1133 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1136 if (!CommitTransaction(wtxNew, reservekey))
1137 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.");
1145 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1149 return _("Invalid amount");
1150 if (nValue + nTransactionFee > GetBalance())
1151 return _("Insufficient funds");
1153 // Parse bitcoin address
1154 CScript scriptPubKey;
1155 scriptPubKey.SetBitcoinAddress(address);
1157 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1163 int CWallet::LoadWallet(bool& fFirstRunRet)
1167 fFirstRunRet = false;
1168 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1169 if (nLoadWalletRet == DB_NEED_REWRITE)
1171 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1174 // Note: can't top-up keypool here, because wallet is locked.
1175 // User will be prompted to unlock wallet the next operation
1176 // the requires a new key.
1178 nLoadWalletRet = DB_NEED_REWRITE;
1181 if (nLoadWalletRet != DB_LOAD_OK)
1182 return nLoadWalletRet;
1183 fFirstRunRet = vchDefaultKey.empty();
1185 if (!HaveKey(Hash160(vchDefaultKey)))
1187 // Create new keyUser and set as default key
1188 RandAddSeedPerfmon();
1190 std::vector<unsigned char> newDefaultKey;
1191 if (!GetKeyFromPool(newDefaultKey, false))
1192 return DB_LOAD_FAIL;
1193 SetDefaultKey(newDefaultKey);
1194 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1195 return DB_LOAD_FAIL;
1198 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1203 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1205 mapAddressBook[address] = strName;
1208 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1211 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1213 mapAddressBook.erase(address);
1216 return CWalletDB(strWalletFile).EraseName(address.ToString());
1220 void CWallet::PrintWallet(const CBlock& block)
1222 CRITICAL_BLOCK(cs_wallet)
1224 if (mapWallet.count(block.vtx[0].GetHash()))
1226 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1227 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1233 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1235 CRITICAL_BLOCK(cs_wallet)
1237 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1238 if (mi != mapWallet.end())
1247 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1251 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1254 vchDefaultKey = vchPubKey;
1258 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1260 if (!pwallet->fFileBacked)
1262 strWalletFileOut = pwallet->strWalletFile;
1267 // Mark old keypool keys as used,
1268 // and generate all new keys
1270 bool CWallet::NewKeyPool()
1272 CRITICAL_BLOCK(cs_wallet)
1274 CWalletDB walletdb(strWalletFile);
1275 BOOST_FOREACH(int64 nIndex, setKeyPool)
1276 walletdb.ErasePool(nIndex);
1282 int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
1283 for (int i = 0; i < nKeys; i++)
1286 walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
1287 setKeyPool.insert(nIndex);
1289 printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
1294 bool CWallet::TopUpKeyPool()
1296 CRITICAL_BLOCK(cs_wallet)
1301 CWalletDB walletdb(strWalletFile);
1304 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1305 while (setKeyPool.size() < nTargetSize+1)
1308 if (!setKeyPool.empty())
1309 nEnd = *(--setKeyPool.end()) + 1;
1310 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1311 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1312 setKeyPool.insert(nEnd);
1313 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1319 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1322 keypool.vchPubKey.clear();
1323 CRITICAL_BLOCK(cs_wallet)
1328 // Get the oldest key
1329 if(setKeyPool.empty())
1332 CWalletDB walletdb(strWalletFile);
1334 nIndex = *(setKeyPool.begin());
1335 setKeyPool.erase(setKeyPool.begin());
1336 if (!walletdb.ReadPool(nIndex, keypool))
1337 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1338 if (!HaveKey(Hash160(keypool.vchPubKey)))
1339 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1340 assert(!keypool.vchPubKey.empty());
1341 printf("keypool reserve %"PRI64d"\n", nIndex);
1345 int64 CWallet::AddReserveKey(const CKeyPool& keypool)
1347 CRITICAL_BLOCK(cs_main)
1348 CRITICAL_BLOCK(cs_wallet)
1350 CWalletDB walletdb(strWalletFile);
1352 int64 nIndex = 1 + *(--setKeyPool.end());
1353 if (!walletdb.WritePool(nIndex, keypool))
1354 throw runtime_error("AddReserveKey() : writing added key failed");
1355 setKeyPool.insert(nIndex);
1361 void CWallet::KeepKey(int64 nIndex)
1363 // Remove from key pool
1366 CWalletDB walletdb(strWalletFile);
1367 walletdb.ErasePool(nIndex);
1369 printf("keypool keep %"PRI64d"\n", nIndex);
1372 void CWallet::ReturnKey(int64 nIndex)
1374 // Return to key pool
1375 CRITICAL_BLOCK(cs_wallet)
1376 setKeyPool.insert(nIndex);
1377 printf("keypool return %"PRI64d"\n", nIndex);
1380 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1384 CRITICAL_BLOCK(cs_wallet)
1386 ReserveKeyFromKeyPool(nIndex, keypool);
1389 if (fAllowReuse && !vchDefaultKey.empty())
1391 result = vchDefaultKey;
1394 if (IsLocked()) return false;
1395 result = GenerateNewKey();
1399 result = keypool.vchPubKey;
1404 int64 CWallet::GetOldestKeyPoolTime()
1408 ReserveKeyFromKeyPool(nIndex, keypool);
1412 return keypool.nTime;
1415 vector<unsigned char> CReserveKey::GetReservedKey()
1420 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1422 vchPubKey = keypool.vchPubKey;
1425 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1426 vchPubKey = pwallet->vchDefaultKey;
1429 assert(!vchPubKey.empty());
1433 void CReserveKey::KeepKey()
1436 pwallet->KeepKey(nIndex);
1441 void CReserveKey::ReturnKey()
1444 pwallet->ReturnKey(nIndex);
1449 void CWallet::GetAllReserveAddresses(set<CBitcoinAddress>& setAddress)
1453 CWalletDB walletdb(strWalletFile);
1455 CRITICAL_BLOCK(cs_main)
1456 CRITICAL_BLOCK(cs_wallet)
1457 BOOST_FOREACH(const int64& id, setKeyPool)
1460 if (!walletdb.ReadPool(id, keypool))
1461 throw runtime_error("GetAllReserveKeyHashes() : read failed");
1462 CBitcoinAddress address(keypool.vchPubKey);
1463 assert(!keypool.vchPubKey.empty());
1464 if (!HaveKey(address))
1465 throw runtime_error("GetAllReserveKeyHashes() : unknown key in key pool");
1466 setAddress.insert(address);