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;
191 Unlock(strWalletPassphrase);
195 // Need to completely rewrite the wallet file; if we don't, bdb might keep
196 // bits of the unencrypted private key in slack space in the database file.
197 CDB::Rewrite(strWalletFile);
203 void CWallet::WalletUpdateSpent(const CTransaction &tx)
205 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
206 // Update the wallet spent flag if it doesn't know due to wallet.dat being
207 // restored from backup or the user making copies of wallet.dat.
208 CRITICAL_BLOCK(cs_wallet)
210 BOOST_FOREACH(const CTxIn& txin, tx.vin)
212 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
213 if (mi != mapWallet.end())
215 CWalletTx& wtx = (*mi).second;
216 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
218 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
219 wtx.MarkSpent(txin.prevout.n);
221 vWalletUpdated.push_back(txin.prevout.hash);
228 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
230 uint256 hash = wtxIn.GetHash();
231 CRITICAL_BLOCK(cs_wallet)
233 // Inserts only if not already there, returns tx inserted or tx found
234 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
235 CWalletTx& wtx = (*ret.first).second;
237 bool fInsertedNew = ret.second;
239 wtx.nTimeReceived = GetAdjustedTime();
241 bool fUpdated = false;
245 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
247 wtx.hashBlock = wtxIn.hashBlock;
250 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
252 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
253 wtx.nIndex = wtxIn.nIndex;
256 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
258 wtx.fFromMe = wtxIn.fFromMe;
261 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
265 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
268 if (fInsertedNew || fUpdated)
269 if (!wtx.WriteToDisk())
272 // If default receiving address gets used, replace it with a new one
273 CScript scriptDefaultKey;
274 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
275 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
277 if (txout.scriptPubKey == scriptDefaultKey)
279 std::vector<unsigned char> newDefaultKey;
280 if (GetKeyFromPool(newDefaultKey, false))
282 SetDefaultKey(newDefaultKey);
283 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
289 vWalletUpdated.push_back(hash);
291 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
292 WalletUpdateSpent(wtx);
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 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
566 CBlockIndex* pindex = pindexStart;
567 CRITICAL_BLOCK(cs_wallet)
572 block.ReadFromDisk(pindex, true);
573 BOOST_FOREACH(CTransaction& tx, block.vtx)
575 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
578 pindex = pindex->pnext;
584 void CWallet::ReacceptWalletTransactions()
588 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
591 vector<CDiskTxPos> vMissingTx;
592 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
594 CWalletTx& wtx = item.second;
595 if (wtx.IsCoinBase() && wtx.IsSpent(0))
599 bool fUpdated = false;
600 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
602 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
603 if (txindex.vSpent.size() != wtx.vout.size())
605 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
608 for (int i = 0; i < txindex.vSpent.size(); i++)
612 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
616 vMissingTx.push_back(txindex.vSpent[i]);
621 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
628 // Reaccept any txes of ours that aren't already in a block
629 if (!wtx.IsCoinBase())
630 wtx.AcceptWalletTransaction(txdb, false);
633 if (!vMissingTx.empty())
635 // TODO: optimize this to scan just part of the block chain?
636 if (ScanForWalletTransactions(pindexGenesisBlock))
637 fRepeat = true; // Found missing transactions: re-do Reaccept.
642 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
644 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
646 if (!tx.IsCoinBase())
648 uint256 hash = tx.GetHash();
649 if (!txdb.ContainsTx(hash))
650 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
655 uint256 hash = GetHash();
656 if (!txdb.ContainsTx(hash))
658 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
659 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
664 void CWalletTx::RelayWalletTransaction()
667 RelayWalletTransaction(txdb);
670 void CWallet::ResendWalletTransactions()
672 // Do this infrequently and randomly to avoid giving away
673 // that these are our transactions.
674 static int64 nNextTime;
675 if (GetTime() < nNextTime)
677 bool fFirst = (nNextTime == 0);
678 nNextTime = GetTime() + GetRand(30 * 60);
682 // Only do it if there's been a new block since last time
683 static int64 nLastTime;
684 if (nTimeBestReceived < nLastTime)
686 nLastTime = GetTime();
688 // Rebroadcast any of our txes that aren't in a block yet
689 printf("ResendWalletTransactions()\n");
691 CRITICAL_BLOCK(cs_wallet)
693 // Sort them in chronological order
694 multimap<unsigned int, CWalletTx*> mapSorted;
695 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
697 CWalletTx& wtx = item.second;
698 // Don't rebroadcast until it's had plenty of time that
699 // it should have gotten in already by now.
700 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
701 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
703 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
705 CWalletTx& wtx = *item.second;
706 wtx.RelayWalletTransaction(txdb);
716 //////////////////////////////////////////////////////////////////////////////
722 int64 CWallet::GetBalance() const
725 CRITICAL_BLOCK(cs_wallet)
727 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
729 const CWalletTx* pcoin = &(*it).second;
730 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
732 nTotal += pcoin->GetAvailableCredit();
740 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
745 // List of values less than target
746 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
747 coinLowestLarger.first = INT64_MAX;
748 coinLowestLarger.second.first = NULL;
749 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
750 int64 nTotalLower = 0;
752 CRITICAL_BLOCK(cs_wallet)
754 vector<const CWalletTx*> vCoins;
755 vCoins.reserve(mapWallet.size());
756 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
757 vCoins.push_back(&(*it).second);
758 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
760 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
762 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
765 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
768 int nDepth = pcoin->GetDepthInMainChain();
769 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
772 for (int i = 0; i < pcoin->vout.size(); i++)
774 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
777 int64 n = pcoin->vout[i].nValue;
782 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
784 if (n == nTargetValue)
786 setCoinsRet.insert(coin.second);
787 nValueRet += coin.first;
790 else if (n < nTargetValue + CENT)
792 vValue.push_back(coin);
795 else if (n < coinLowestLarger.first)
797 coinLowestLarger = coin;
803 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
805 for (int i = 0; i < vValue.size(); ++i)
807 setCoinsRet.insert(vValue[i].second);
808 nValueRet += vValue[i].first;
813 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
815 if (coinLowestLarger.second.first == NULL)
817 setCoinsRet.insert(coinLowestLarger.second);
818 nValueRet += coinLowestLarger.first;
822 if (nTotalLower >= nTargetValue + CENT)
823 nTargetValue += CENT;
825 // Solve subset sum by stochastic approximation
826 sort(vValue.rbegin(), vValue.rend());
827 vector<char> vfIncluded;
828 vector<char> vfBest(vValue.size(), true);
829 int64 nBest = nTotalLower;
831 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
833 vfIncluded.assign(vValue.size(), false);
835 bool fReachedTarget = false;
836 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
838 for (int i = 0; i < vValue.size(); i++)
840 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
842 nTotal += vValue[i].first;
843 vfIncluded[i] = true;
844 if (nTotal >= nTargetValue)
846 fReachedTarget = true;
852 nTotal -= vValue[i].first;
853 vfIncluded[i] = false;
860 // If the next larger is still closer, return it
861 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
863 setCoinsRet.insert(coinLowestLarger.second);
864 nValueRet += coinLowestLarger.first;
867 for (int i = 0; i < vValue.size(); i++)
870 setCoinsRet.insert(vValue[i].second);
871 nValueRet += vValue[i].first;
875 printf("SelectCoins() best subset: ");
876 for (int i = 0; i < vValue.size(); i++)
878 printf("%s ", FormatMoney(vValue[i].first).c_str());
879 printf("total %s\n", FormatMoney(nBest).c_str());
885 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
887 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
888 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
889 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
895 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
898 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
904 if (vecSend.empty() || nValue < 0)
907 wtxNew.pwallet = this;
909 CRITICAL_BLOCK(cs_main)
910 CRITICAL_BLOCK(cs_wallet)
912 // txdb must be opened before the mapWallet lock
915 nFeeRet = nTransactionFee;
920 wtxNew.fFromMe = true;
922 int64 nTotalValue = nValue + nFeeRet;
923 double dPriority = 0;
924 // vouts to the payees
925 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
926 wtxNew.vout.push_back(CTxOut(s.second, s.first));
928 // Choose coins to use
929 set<pair<const CWalletTx*,unsigned int> > setCoins;
931 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
933 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
935 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
936 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
939 int64 nChange = nValueIn - nValue - nFeeRet;
940 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
941 // or until nChange becomes zero
942 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
944 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
945 nChange -= nMoveToFee;
946 nFeeRet += nMoveToFee;
951 // Note: We use a new key here to keep it from being obvious which side is the change.
952 // The drawback is that by not reusing a previous key, the change may be lost if a
953 // backup is restored, if the backup doesn't have the new private key for the change.
954 // If we reused the old key, it would be possible to add code to look for and
955 // rediscover unknown transactions that were written with keys of ours to recover
956 // post-backup change.
958 // Reserve a new key pair from key pool
959 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
960 // assert(mapKeys.count(vchPubKey));
962 // Fill a vout to ourself, using same address type as the payment
963 CScript scriptChange;
964 if (vecSend[0].first.GetBitcoinAddress().IsValid())
965 scriptChange.SetBitcoinAddress(vchPubKey);
967 scriptChange << vchPubKey << OP_CHECKSIG;
969 // Insert change txn at random position:
970 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
971 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
974 reservekey.ReturnKey();
977 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
978 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
982 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
983 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
987 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
988 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
992 // Check that enough fee is included
993 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
994 bool fAllowFree = CTransaction::AllowFree(dPriority);
995 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
996 if (nFeeRet < max(nPayFee, nMinFee))
998 nFeeRet = max(nPayFee, nMinFee);
1002 // Fill vtxPrev by copying from previous transactions vtxPrev
1003 wtxNew.AddSupportingTransactions(txdb);
1004 wtxNew.fTimeReceivedIsTxTime = true;
1013 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1015 vector< pair<CScript, int64> > vecSend;
1016 vecSend.push_back(make_pair(scriptPubKey, nValue));
1017 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1020 // Call after CreateTransaction unless you want to abort
1021 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1023 CRITICAL_BLOCK(cs_main)
1024 CRITICAL_BLOCK(cs_wallet)
1026 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1028 // This is only to keep the database open to defeat the auto-flush for the
1029 // duration of this scope. This is the only place where this optimization
1030 // maybe makes sense; please don't do it anywhere else.
1031 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1033 // Take key pair from key pool so it won't be used again
1034 reservekey.KeepKey();
1036 // Add tx to wallet, because if it has change it's also ours,
1037 // otherwise just for transaction history.
1038 AddToWallet(wtxNew);
1040 // Mark old coins as spent
1041 set<CWalletTx*> setCoins;
1042 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1044 CWalletTx &coin = mapWallet[txin.prevout.hash];
1045 coin.pwallet = this;
1046 coin.MarkSpent(txin.prevout.n);
1048 vWalletUpdated.push_back(coin.GetHash());
1055 // Track how many getdata requests our transaction gets
1056 mapRequestCount[wtxNew.GetHash()] = 0;
1059 if (!wtxNew.AcceptToMemoryPool())
1061 // This must not fail. The transaction has already been signed and recorded.
1062 printf("CommitTransaction() : Error: Transaction not valid");
1065 wtxNew.RelayWalletTransaction();
1074 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1076 CReserveKey reservekey(this);
1081 string strError = _("Error: Wallet locked, unable to create transaction ");
1082 printf("SendMoney() : %s", strError.c_str());
1085 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1088 if (nValue + nFeeRequired > GetBalance())
1089 strError = strprintf(_("Error: This transaction requires a transaction fee of at least %s because of its amount, complexity, or use of recently received funds "), FormatMoney(nFeeRequired).c_str());
1091 strError = _("Error: Transaction creation failed ");
1092 printf("SendMoney() : %s", strError.c_str());
1096 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1099 if (!CommitTransaction(wtxNew, reservekey))
1100 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.");
1108 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1112 return _("Invalid amount");
1113 if (nValue + nTransactionFee > GetBalance())
1114 return _("Insufficient funds");
1116 // Parse bitcoin address
1117 CScript scriptPubKey;
1118 scriptPubKey.SetBitcoinAddress(address);
1120 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1126 int CWallet::LoadWallet(bool& fFirstRunRet)
1130 fFirstRunRet = false;
1131 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1132 if (nLoadWalletRet == DB_NEED_REWRITE)
1134 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1137 // Note: can't top-up keypool here, because wallet is locked.
1138 // User will be prompted to unlock wallet the next operation
1139 // the requires a new key.
1141 nLoadWalletRet = DB_NEED_REWRITE;
1144 if (nLoadWalletRet != DB_LOAD_OK)
1145 return nLoadWalletRet;
1146 fFirstRunRet = vchDefaultKey.empty();
1148 if (!HaveKey(Hash160(vchDefaultKey)))
1150 // Create new keyUser and set as default key
1151 RandAddSeedPerfmon();
1153 std::vector<unsigned char> newDefaultKey;
1154 if (!GetKeyFromPool(newDefaultKey, false))
1155 return DB_LOAD_FAIL;
1156 SetDefaultKey(newDefaultKey);
1157 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1158 return DB_LOAD_FAIL;
1161 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1166 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1168 mapAddressBook[address] = strName;
1171 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1174 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1176 mapAddressBook.erase(address);
1179 return CWalletDB(strWalletFile).EraseName(address.ToString());
1183 void CWallet::PrintWallet(const CBlock& block)
1185 CRITICAL_BLOCK(cs_wallet)
1187 if (mapWallet.count(block.vtx[0].GetHash()))
1189 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1190 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1196 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1198 CRITICAL_BLOCK(cs_wallet)
1200 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1201 if (mi != mapWallet.end())
1210 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1214 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1217 vchDefaultKey = vchPubKey;
1221 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1223 if (!pwallet->fFileBacked)
1225 strWalletFileOut = pwallet->strWalletFile;
1230 // Mark old keypool keys as used,
1231 // and generate all new keys
1233 bool CWallet::NewKeyPool()
1235 CRITICAL_BLOCK(cs_wallet)
1237 CWalletDB walletdb(strWalletFile);
1238 BOOST_FOREACH(int64 nIndex, setKeyPool)
1239 walletdb.ErasePool(nIndex);
1245 int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
1246 for (int i = 0; i < nKeys; i++)
1249 walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
1250 setKeyPool.insert(nIndex);
1252 printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
1257 bool CWallet::TopUpKeyPool()
1259 CRITICAL_BLOCK(cs_wallet)
1264 CWalletDB walletdb(strWalletFile);
1267 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1268 while (setKeyPool.size() < nTargetSize+1)
1271 if (!setKeyPool.empty())
1272 nEnd = *(--setKeyPool.end()) + 1;
1273 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1274 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1275 setKeyPool.insert(nEnd);
1276 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1282 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1285 keypool.vchPubKey.clear();
1286 CRITICAL_BLOCK(cs_wallet)
1291 // Get the oldest key
1292 if(setKeyPool.empty())
1295 CWalletDB walletdb(strWalletFile);
1297 nIndex = *(setKeyPool.begin());
1298 setKeyPool.erase(setKeyPool.begin());
1299 if (!walletdb.ReadPool(nIndex, keypool))
1300 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1301 if (!HaveKey(Hash160(keypool.vchPubKey)))
1302 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1303 assert(!keypool.vchPubKey.empty());
1304 printf("keypool reserve %"PRI64d"\n", nIndex);
1308 void CWallet::KeepKey(int64 nIndex)
1310 // Remove from key pool
1313 CWalletDB walletdb(strWalletFile);
1314 walletdb.ErasePool(nIndex);
1316 printf("keypool keep %"PRI64d"\n", nIndex);
1319 void CWallet::ReturnKey(int64 nIndex)
1321 // Return to key pool
1322 CRITICAL_BLOCK(cs_wallet)
1323 setKeyPool.insert(nIndex);
1324 printf("keypool return %"PRI64d"\n", nIndex);
1327 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1331 CRITICAL_BLOCK(cs_wallet)
1333 ReserveKeyFromKeyPool(nIndex, keypool);
1336 if (fAllowReuse && !vchDefaultKey.empty())
1338 result = vchDefaultKey;
1341 if (IsLocked()) return false;
1342 result = GenerateNewKey();
1346 result = keypool.vchPubKey;
1351 int64 CWallet::GetOldestKeyPoolTime()
1355 ReserveKeyFromKeyPool(nIndex, keypool);
1359 return keypool.nTime;
1362 vector<unsigned char> CReserveKey::GetReservedKey()
1367 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1369 vchPubKey = keypool.vchPubKey;
1372 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1373 vchPubKey = pwallet->vchDefaultKey;
1376 assert(!vchPubKey.empty());
1380 void CReserveKey::KeepKey()
1383 pwallet->KeepKey(nIndex);
1388 void CReserveKey::ReturnKey()
1391 pwallet->ReturnKey(nIndex);