1 // Copyright (c) 2009-2011 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Copyright (c) 2011 The PPCoin developers
4 // Distributed under the MIT/X11 software license, see the accompanying
5 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
9 #include "cryptopp/sha.h"
15 //////////////////////////////////////////////////////////////////////////////
20 bool CWallet::AddKey(const CKey& key)
22 if (!CCryptoKeyStore::AddKey(key))
27 return CWalletDB(strWalletFile).WriteKey(key.GetPubKey(), key.GetPrivKey());
31 bool CWallet::AddCryptedKey(const vector<unsigned char> &vchPubKey, const vector<unsigned char> &vchCryptedSecret)
33 if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
37 CRITICAL_BLOCK(cs_wallet)
39 if (pwalletdbEncryption)
40 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
42 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;
196 void CWallet::WalletUpdateSpent(const CTransaction &tx)
198 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
199 // Update the wallet spent flag if it doesn't know due to wallet.dat being
200 // restored from backup or the user making copies of wallet.dat.
201 CRITICAL_BLOCK(cs_wallet)
203 BOOST_FOREACH(const CTxIn& txin, tx.vin)
205 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
206 if (mi != mapWallet.end())
208 CWalletTx& wtx = (*mi).second;
209 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
211 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
212 wtx.MarkSpent(txin.prevout.n);
214 vWalletUpdated.push_back(txin.prevout.hash);
221 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
223 uint256 hash = wtxIn.GetHash();
224 CRITICAL_BLOCK(cs_wallet)
226 // Inserts only if not already there, returns tx inserted or tx found
227 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
228 CWalletTx& wtx = (*ret.first).second;
230 bool fInsertedNew = ret.second;
232 wtx.nTimeReceived = GetAdjustedTime();
234 bool fUpdated = false;
238 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
240 wtx.hashBlock = wtxIn.hashBlock;
243 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
245 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
246 wtx.nIndex = wtxIn.nIndex;
249 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
251 wtx.fFromMe = wtxIn.fFromMe;
254 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
258 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
261 if (fInsertedNew || fUpdated)
262 if (!wtx.WriteToDisk())
265 // If default receiving address gets used, replace it with a new one
266 CScript scriptDefaultKey;
267 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
268 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
270 if (txout.scriptPubKey == scriptDefaultKey)
272 std::vector<unsigned char> newDefaultKey;
273 if (GetKeyFromPool(newDefaultKey, false))
275 SetDefaultKey(newDefaultKey);
276 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
282 vWalletUpdated.push_back(hash);
284 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
285 WalletUpdateSpent(wtx);
293 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
295 uint256 hash = tx.GetHash();
296 CRITICAL_BLOCK(cs_wallet)
298 bool fExisted = mapWallet.count(hash);
299 if (fExisted && !fUpdate) return false;
300 if (fExisted || IsMine(tx) || IsFromMe(tx))
302 CWalletTx wtx(this,tx);
303 // Get merkle branch if transaction was found in a block
305 wtx.SetMerkleBranch(pblock);
306 return AddToWallet(wtx);
309 WalletUpdateSpent(tx);
314 bool CWallet::EraseFromWallet(uint256 hash)
318 CRITICAL_BLOCK(cs_wallet)
320 if (mapWallet.erase(hash))
321 CWalletDB(strWalletFile).EraseTx(hash);
327 bool CWallet::IsMine(const CTxIn &txin) const
329 CRITICAL_BLOCK(cs_wallet)
331 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
332 if (mi != mapWallet.end())
334 const CWalletTx& prev = (*mi).second;
335 if (txin.prevout.n < prev.vout.size())
336 if (IsMine(prev.vout[txin.prevout.n]))
343 int64 CWallet::GetDebit(const CTxIn &txin) const
345 CRITICAL_BLOCK(cs_wallet)
347 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
348 if (mi != mapWallet.end())
350 const CWalletTx& prev = (*mi).second;
351 if (txin.prevout.n < prev.vout.size())
352 if (IsMine(prev.vout[txin.prevout.n]))
353 return prev.vout[txin.prevout.n].nValue;
359 int64 CWalletTx::GetTxTime() const
361 return nTimeReceived;
364 int CWalletTx::GetRequestCount() const
366 // Returns -1 if it wasn't being tracked
368 CRITICAL_BLOCK(pwallet->cs_wallet)
375 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
376 if (mi != pwallet->mapRequestCount.end())
377 nRequests = (*mi).second;
382 // Did anyone request this transaction?
383 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
384 if (mi != pwallet->mapRequestCount.end())
386 nRequests = (*mi).second;
388 // How about the block it's in?
389 if (nRequests == 0 && hashBlock != 0)
391 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
392 if (mi != pwallet->mapRequestCount.end())
393 nRequests = (*mi).second;
395 nRequests = 1; // If it's in someone else's block it must have got out
403 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
404 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
406 nGeneratedImmature = nGeneratedMature = nFee = 0;
407 listReceived.clear();
409 strSentAccount = strFromAccount;
413 if (GetBlocksToMaturity() > 0)
414 nGeneratedImmature = pwallet->GetCredit(*this);
416 nGeneratedMature = GetCredit();
421 int64 nDebit = GetDebit();
422 if (nDebit > 0) // debit>0 means we signed/sent this transaction
424 int64 nValueOut = GetValueOut();
425 nFee = nDebit - nValueOut;
428 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
429 // but non-standard clients might (so return a list of address/amount pairs)
430 BOOST_FOREACH(const CTxOut& txout, vout)
432 CBitcoinAddress address;
433 vector<unsigned char> vchPubKey;
434 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
436 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
437 this->GetHash().ToString().c_str());
438 address = " unknown ";
441 // Don't report 'change' txouts
442 if (nDebit > 0 && pwallet->IsChange(txout))
446 listSent.push_back(make_pair(address, txout.nValue));
448 if (pwallet->IsMine(txout))
449 listReceived.push_back(make_pair(address, txout.nValue));
454 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
455 int64& nSent, int64& nFee) const
457 nGenerated = nReceived = nSent = nFee = 0;
459 int64 allGeneratedImmature, allGeneratedMature, allFee;
460 allGeneratedImmature = allGeneratedMature = allFee = 0;
461 string strSentAccount;
462 list<pair<CBitcoinAddress, int64> > listReceived;
463 list<pair<CBitcoinAddress, int64> > listSent;
464 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
466 if (strAccount == "")
467 nGenerated = allGeneratedMature;
468 if (strAccount == strSentAccount)
470 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
474 CRITICAL_BLOCK(pwallet->cs_wallet)
476 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
478 if (pwallet->mapAddressBook.count(r.first))
480 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
481 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
482 nReceived += r.second;
484 else if (strAccount.empty())
486 nReceived += r.second;
492 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
496 const int COPY_DEPTH = 3;
497 if (SetMerkleBranch() < COPY_DEPTH)
499 vector<uint256> vWorkQueue;
500 BOOST_FOREACH(const CTxIn& txin, vin)
501 vWorkQueue.push_back(txin.prevout.hash);
503 // This critsect is OK because txdb is already open
504 CRITICAL_BLOCK(pwallet->cs_wallet)
506 map<uint256, const CMerkleTx*> mapWalletPrev;
507 set<uint256> setAlreadyDone;
508 for (int i = 0; i < vWorkQueue.size(); i++)
510 uint256 hash = vWorkQueue[i];
511 if (setAlreadyDone.count(hash))
513 setAlreadyDone.insert(hash);
516 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
517 if (mi != pwallet->mapWallet.end())
520 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
521 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
523 else if (mapWalletPrev.count(hash))
525 tx = *mapWalletPrev[hash];
527 else if (!fClient && txdb.ReadDiskTx(hash, tx))
533 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
537 int nDepth = tx.SetMerkleBranch();
538 vtxPrev.push_back(tx);
540 if (nDepth < COPY_DEPTH)
541 BOOST_FOREACH(const CTxIn& txin, tx.vin)
542 vWorkQueue.push_back(txin.prevout.hash);
547 reverse(vtxPrev.begin(), vtxPrev.end());
550 bool CWalletTx::WriteToDisk()
552 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
555 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
559 CBlockIndex* pindex = pindexStart;
560 CRITICAL_BLOCK(cs_wallet)
565 block.ReadFromDisk(pindex, true);
566 BOOST_FOREACH(CTransaction& tx, block.vtx)
568 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
571 pindex = pindex->pnext;
577 void CWallet::ReacceptWalletTransactions()
581 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
584 vector<CDiskTxPos> vMissingTx;
585 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
587 CWalletTx& wtx = item.second;
588 if (wtx.IsCoinBase() && wtx.IsSpent(0))
592 bool fUpdated = false;
593 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
595 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
596 if (txindex.vSpent.size() != wtx.vout.size())
598 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
601 for (int i = 0; i < txindex.vSpent.size(); i++)
605 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
609 vMissingTx.push_back(txindex.vSpent[i]);
614 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
621 // Reaccept any txes of ours that aren't already in a block
622 if (!wtx.IsCoinBase())
623 wtx.AcceptWalletTransaction(txdb, false);
626 if (!vMissingTx.empty())
628 // TODO: optimize this to scan just part of the block chain?
629 if (ScanForWalletTransactions(pindexGenesisBlock))
630 fRepeat = true; // Found missing transactions: re-do Reaccept.
635 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
637 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
639 if (!tx.IsCoinBase())
641 uint256 hash = tx.GetHash();
642 if (!txdb.ContainsTx(hash))
643 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
648 uint256 hash = GetHash();
649 if (!txdb.ContainsTx(hash))
651 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
652 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
657 void CWalletTx::RelayWalletTransaction()
660 RelayWalletTransaction(txdb);
663 void CWallet::ResendWalletTransactions()
665 // Do this infrequently and randomly to avoid giving away
666 // that these are our transactions.
667 static int64 nNextTime;
668 if (GetTime() < nNextTime)
670 bool fFirst = (nNextTime == 0);
671 nNextTime = GetTime() + GetRand(30 * 60);
675 // Only do it if there's been a new block since last time
676 static int64 nLastTime;
677 if (nTimeBestReceived < nLastTime)
679 nLastTime = GetTime();
681 // Rebroadcast any of our txes that aren't in a block yet
682 printf("ResendWalletTransactions()\n");
684 CRITICAL_BLOCK(cs_wallet)
686 // Sort them in chronological order
687 multimap<unsigned int, CWalletTx*> mapSorted;
688 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
690 CWalletTx& wtx = item.second;
691 // Don't rebroadcast until it's had plenty of time that
692 // it should have gotten in already by now.
693 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
694 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
696 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
698 CWalletTx& wtx = *item.second;
699 wtx.RelayWalletTransaction(txdb);
709 //////////////////////////////////////////////////////////////////////////////
715 int64 CWallet::GetBalance() const
718 CRITICAL_BLOCK(cs_wallet)
720 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
722 const CWalletTx* pcoin = &(*it).second;
723 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
725 nTotal += pcoin->GetAvailableCredit();
733 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
738 // List of values less than target
739 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
740 coinLowestLarger.first = INT64_MAX;
741 coinLowestLarger.second.first = NULL;
742 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
743 int64 nTotalLower = 0;
745 CRITICAL_BLOCK(cs_wallet)
747 vector<const CWalletTx*> vCoins;
748 vCoins.reserve(mapWallet.size());
749 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
750 vCoins.push_back(&(*it).second);
751 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
753 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
755 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
758 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
761 int nDepth = pcoin->GetDepthInMainChain();
762 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
765 for (int i = 0; i < pcoin->vout.size(); i++)
767 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
770 int64 n = pcoin->vout[i].nValue;
775 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
777 if (n == nTargetValue)
779 setCoinsRet.insert(coin.second);
780 nValueRet += coin.first;
783 else if (n < nTargetValue + CENT)
785 vValue.push_back(coin);
788 else if (n < coinLowestLarger.first)
790 coinLowestLarger = coin;
796 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
798 for (int i = 0; i < vValue.size(); ++i)
800 setCoinsRet.insert(vValue[i].second);
801 nValueRet += vValue[i].first;
806 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
808 if (coinLowestLarger.second.first == NULL)
810 setCoinsRet.insert(coinLowestLarger.second);
811 nValueRet += coinLowestLarger.first;
815 if (nTotalLower >= nTargetValue + CENT)
816 nTargetValue += CENT;
818 // Solve subset sum by stochastic approximation
819 sort(vValue.rbegin(), vValue.rend());
820 vector<char> vfIncluded;
821 vector<char> vfBest(vValue.size(), true);
822 int64 nBest = nTotalLower;
824 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
826 vfIncluded.assign(vValue.size(), false);
828 bool fReachedTarget = false;
829 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
831 for (int i = 0; i < vValue.size(); i++)
833 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
835 nTotal += vValue[i].first;
836 vfIncluded[i] = true;
837 if (nTotal >= nTargetValue)
839 fReachedTarget = true;
845 nTotal -= vValue[i].first;
846 vfIncluded[i] = false;
853 // If the next larger is still closer, return it
854 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
856 setCoinsRet.insert(coinLowestLarger.second);
857 nValueRet += coinLowestLarger.first;
860 for (int i = 0; i < vValue.size(); i++)
863 setCoinsRet.insert(vValue[i].second);
864 nValueRet += vValue[i].first;
868 printf("SelectCoins() best subset: ");
869 for (int i = 0; i < vValue.size(); i++)
871 printf("%s ", FormatMoney(vValue[i].first).c_str());
872 printf("total %s\n", FormatMoney(nBest).c_str());
878 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
880 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
881 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
882 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
888 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
891 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
897 if (vecSend.empty() || nValue < 0)
900 wtxNew.pwallet = this;
902 CRITICAL_BLOCK(cs_main)
903 CRITICAL_BLOCK(cs_wallet)
905 // txdb must be opened before the mapWallet lock
908 nFeeRet = nTransactionFee;
913 wtxNew.fFromMe = true;
915 int64 nTotalValue = nValue + nFeeRet;
916 double dPriority = 0;
917 // vouts to the payees
918 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
919 wtxNew.vout.push_back(CTxOut(s.second, s.first));
921 // Choose coins to use
922 set<pair<const CWalletTx*,unsigned int> > setCoins;
924 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
926 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
928 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
929 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
932 int64 nChange = nValueIn - nValue - nFeeRet;
933 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
934 // or until nChange becomes zero
935 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
937 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
938 nChange -= nMoveToFee;
939 nFeeRet += nMoveToFee;
944 // Note: We use a new key here to keep it from being obvious which side is the change.
945 // The drawback is that by not reusing a previous key, the change may be lost if a
946 // backup is restored, if the backup doesn't have the new private key for the change.
947 // If we reused the old key, it would be possible to add code to look for and
948 // rediscover unknown transactions that were written with keys of ours to recover
949 // post-backup change.
951 // Reserve a new key pair from key pool
952 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
953 // assert(mapKeys.count(vchPubKey));
955 // Fill a vout to ourself, using same address type as the payment
956 CScript scriptChange;
957 if (vecSend[0].first.GetBitcoinAddress().IsValid())
958 scriptChange.SetBitcoinAddress(vchPubKey);
960 scriptChange << vchPubKey << OP_CHECKSIG;
962 // Insert change txn at random position:
963 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
964 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
967 reservekey.ReturnKey();
970 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
971 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
975 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
976 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
980 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
981 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
985 // Check that enough fee is included
986 int64 nPayFee = nTransactionFee; // ppcoin: simplify tx fee
987 int64 nMinFee = wtxNew.GetMinFee(1, false);
988 if (nFeeRet < max(nPayFee, nMinFee))
990 nFeeRet = max(nPayFee, nMinFee);
994 // Fill vtxPrev by copying from previous transactions vtxPrev
995 wtxNew.AddSupportingTransactions(txdb);
996 wtxNew.fTimeReceivedIsTxTime = true;
1005 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1007 vector< pair<CScript, int64> > vecSend;
1008 vecSend.push_back(make_pair(scriptPubKey, nValue));
1009 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1012 // Call after CreateTransaction unless you want to abort
1013 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1015 CRITICAL_BLOCK(cs_main)
1016 CRITICAL_BLOCK(cs_wallet)
1018 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1020 // This is only to keep the database open to defeat the auto-flush for the
1021 // duration of this scope. This is the only place where this optimization
1022 // maybe makes sense; please don't do it anywhere else.
1023 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1025 // Take key pair from key pool so it won't be used again
1026 reservekey.KeepKey();
1028 // Add tx to wallet, because if it has change it's also ours,
1029 // otherwise just for transaction history.
1030 AddToWallet(wtxNew);
1032 // Mark old coins as spent
1033 set<CWalletTx*> setCoins;
1034 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1036 CWalletTx &coin = mapWallet[txin.prevout.hash];
1037 coin.pwallet = this;
1038 coin.MarkSpent(txin.prevout.n);
1040 vWalletUpdated.push_back(coin.GetHash());
1047 // Track how many getdata requests our transaction gets
1048 mapRequestCount[wtxNew.GetHash()] = 0;
1051 if (!wtxNew.AcceptToMemoryPool())
1053 // This must not fail. The transaction has already been signed and recorded.
1054 printf("CommitTransaction() : Error: Transaction not valid");
1057 wtxNew.RelayWalletTransaction();
1066 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1068 CReserveKey reservekey(this);
1073 string strError = _("Error: Wallet locked, unable to create transaction ");
1074 printf("SendMoney() : %s", strError.c_str());
1077 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1080 if (nValue + nFeeRequired > GetBalance())
1081 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());
1083 strError = _("Error: Transaction creation failed ");
1084 printf("SendMoney() : %s", strError.c_str());
1088 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1091 if (!CommitTransaction(wtxNew, reservekey))
1092 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.");
1100 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1104 return _("Invalid amount");
1105 if (nValue + nTransactionFee > GetBalance())
1106 return _("Insufficient funds");
1108 // Parse bitcoin address
1109 CScript scriptPubKey;
1110 scriptPubKey.SetBitcoinAddress(address);
1112 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1118 int CWallet::LoadWallet(bool& fFirstRunRet)
1122 fFirstRunRet = false;
1123 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1124 if (nLoadWalletRet != DB_LOAD_OK)
1125 return nLoadWalletRet;
1126 fFirstRunRet = vchDefaultKey.empty();
1128 if (!HaveKey(Hash160(vchDefaultKey)))
1130 // Create new keyUser and set as default key
1131 RandAddSeedPerfmon();
1133 std::vector<unsigned char> newDefaultKey;
1134 if (!GetKeyFromPool(newDefaultKey, false))
1135 return DB_LOAD_FAIL;
1136 SetDefaultKey(newDefaultKey);
1137 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1138 return DB_LOAD_FAIL;
1141 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1146 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1148 mapAddressBook[address] = strName;
1151 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1154 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1156 mapAddressBook.erase(address);
1159 return CWalletDB(strWalletFile).EraseName(address.ToString());
1163 void CWallet::PrintWallet(const CBlock& block)
1165 CRITICAL_BLOCK(cs_wallet)
1167 if (mapWallet.count(block.vtx[0].GetHash()))
1169 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1170 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1176 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1178 CRITICAL_BLOCK(cs_wallet)
1180 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1181 if (mi != mapWallet.end())
1190 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1194 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1197 vchDefaultKey = vchPubKey;
1201 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1203 if (!pwallet->fFileBacked)
1205 strWalletFileOut = pwallet->strWalletFile;
1209 bool CWallet::TopUpKeyPool()
1211 CRITICAL_BLOCK(cs_wallet)
1216 CWalletDB walletdb(strWalletFile);
1219 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1220 while (setKeyPool.size() < nTargetSize+1)
1223 if (!setKeyPool.empty())
1224 nEnd = *(--setKeyPool.end()) + 1;
1225 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1226 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1227 setKeyPool.insert(nEnd);
1228 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1234 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1237 keypool.vchPubKey.clear();
1238 CRITICAL_BLOCK(cs_wallet)
1243 // Get the oldest key
1244 if(setKeyPool.empty())
1247 CWalletDB walletdb(strWalletFile);
1249 nIndex = *(setKeyPool.begin());
1250 setKeyPool.erase(setKeyPool.begin());
1251 if (!walletdb.ReadPool(nIndex, keypool))
1252 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1253 if (!HaveKey(Hash160(keypool.vchPubKey)))
1254 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1255 assert(!keypool.vchPubKey.empty());
1256 printf("keypool reserve %"PRI64d"\n", nIndex);
1260 void CWallet::KeepKey(int64 nIndex)
1262 // Remove from key pool
1265 CWalletDB walletdb(strWalletFile);
1266 walletdb.ErasePool(nIndex);
1268 printf("keypool keep %"PRI64d"\n", nIndex);
1271 void CWallet::ReturnKey(int64 nIndex)
1273 // Return to key pool
1274 CRITICAL_BLOCK(cs_wallet)
1275 setKeyPool.insert(nIndex);
1276 printf("keypool return %"PRI64d"\n", nIndex);
1279 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1283 CRITICAL_BLOCK(cs_wallet)
1285 ReserveKeyFromKeyPool(nIndex, keypool);
1288 if (fAllowReuse && !vchDefaultKey.empty())
1290 result = vchDefaultKey;
1293 if (IsLocked()) return false;
1294 result = GenerateNewKey();
1298 result = keypool.vchPubKey;
1303 int64 CWallet::GetOldestKeyPoolTime()
1307 ReserveKeyFromKeyPool(nIndex, keypool);
1311 return keypool.nTime;
1314 vector<unsigned char> CReserveKey::GetReservedKey()
1319 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1321 vchPubKey = keypool.vchPubKey;
1324 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1325 vchPubKey = pwallet->vchDefaultKey;
1328 assert(!vchPubKey.empty());
1332 void CReserveKey::KeepKey()
1335 pwallet->KeepKey(nIndex);
1340 void CReserveKey::ReturnKey()
1343 pwallet->ReturnKey(nIndex);