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 delete pwalletdbEncryption;
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 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
229 uint256 hash = wtxIn.GetHash();
230 CRITICAL_BLOCK(cs_wallet)
232 // Inserts only if not already there, returns tx inserted or tx found
233 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
234 CWalletTx& wtx = (*ret.first).second;
236 bool fInsertedNew = ret.second;
238 wtx.nTimeReceived = GetAdjustedTime();
240 bool fUpdated = false;
244 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
246 wtx.hashBlock = wtxIn.hashBlock;
249 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
251 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
252 wtx.nIndex = wtxIn.nIndex;
255 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
257 wtx.fFromMe = wtxIn.fFromMe;
260 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
264 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
267 if (fInsertedNew || fUpdated)
268 if (!wtx.WriteToDisk())
271 // If default receiving address gets used, replace it with a new one
272 CScript scriptDefaultKey;
273 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
274 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
276 if (txout.scriptPubKey == scriptDefaultKey)
278 std::vector<unsigned char> newDefaultKey;
279 if (GetKeyFromPool(newDefaultKey, false))
281 SetDefaultKey(newDefaultKey);
282 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
288 vWalletUpdated.push_back(hash);
290 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
291 WalletUpdateSpent(wtx);
299 // Add a transaction to the wallet, or update it.
300 // pblock is optional, but should be provided if the transaction is known to be in a block.
301 // If fUpdate is true, existing transactions will be updated.
302 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
304 uint256 hash = tx.GetHash();
305 CRITICAL_BLOCK(cs_wallet)
307 bool fExisted = mapWallet.count(hash);
308 if (fExisted && !fUpdate) return false;
309 if (fExisted || IsMine(tx) || IsFromMe(tx))
311 CWalletTx wtx(this,tx);
312 // Get merkle branch if transaction was found in a block
314 wtx.SetMerkleBranch(pblock);
315 return AddToWallet(wtx);
318 WalletUpdateSpent(tx);
323 bool CWallet::EraseFromWallet(uint256 hash)
327 CRITICAL_BLOCK(cs_wallet)
329 if (mapWallet.erase(hash))
330 CWalletDB(strWalletFile).EraseTx(hash);
336 bool CWallet::IsMine(const CTxIn &txin) const
338 CRITICAL_BLOCK(cs_wallet)
340 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
341 if (mi != mapWallet.end())
343 const CWalletTx& prev = (*mi).second;
344 if (txin.prevout.n < prev.vout.size())
345 if (IsMine(prev.vout[txin.prevout.n]))
352 int64 CWallet::GetDebit(const CTxIn &txin) const
354 CRITICAL_BLOCK(cs_wallet)
356 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
357 if (mi != mapWallet.end())
359 const CWalletTx& prev = (*mi).second;
360 if (txin.prevout.n < prev.vout.size())
361 if (IsMine(prev.vout[txin.prevout.n]))
362 return prev.vout[txin.prevout.n].nValue;
368 int64 CWalletTx::GetTxTime() const
370 return nTimeReceived;
373 int CWalletTx::GetRequestCount() const
375 // Returns -1 if it wasn't being tracked
377 CRITICAL_BLOCK(pwallet->cs_wallet)
384 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
385 if (mi != pwallet->mapRequestCount.end())
386 nRequests = (*mi).second;
391 // Did anyone request this transaction?
392 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
393 if (mi != pwallet->mapRequestCount.end())
395 nRequests = (*mi).second;
397 // How about the block it's in?
398 if (nRequests == 0 && hashBlock != 0)
400 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
401 if (mi != pwallet->mapRequestCount.end())
402 nRequests = (*mi).second;
404 nRequests = 1; // If it's in someone else's block it must have got out
412 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
413 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
415 nGeneratedImmature = nGeneratedMature = nFee = 0;
416 listReceived.clear();
418 strSentAccount = strFromAccount;
422 if (GetBlocksToMaturity() > 0)
423 nGeneratedImmature = pwallet->GetCredit(*this);
425 nGeneratedMature = GetCredit();
430 int64 nDebit = GetDebit();
431 if (nDebit > 0) // debit>0 means we signed/sent this transaction
433 int64 nValueOut = GetValueOut();
434 nFee = nDebit - nValueOut;
437 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
438 // but non-standard clients might (so return a list of address/amount pairs)
439 BOOST_FOREACH(const CTxOut& txout, vout)
441 CBitcoinAddress address;
442 vector<unsigned char> vchPubKey;
443 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
445 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
446 this->GetHash().ToString().c_str());
447 address = " unknown ";
450 // Don't report 'change' txouts
451 if (nDebit > 0 && pwallet->IsChange(txout))
455 listSent.push_back(make_pair(address, txout.nValue));
457 if (pwallet->IsMine(txout))
458 listReceived.push_back(make_pair(address, txout.nValue));
463 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
464 int64& nSent, int64& nFee) const
466 nGenerated = nReceived = nSent = nFee = 0;
468 int64 allGeneratedImmature, allGeneratedMature, allFee;
469 allGeneratedImmature = allGeneratedMature = allFee = 0;
470 string strSentAccount;
471 list<pair<CBitcoinAddress, int64> > listReceived;
472 list<pair<CBitcoinAddress, int64> > listSent;
473 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
475 if (strAccount == "")
476 nGenerated = allGeneratedMature;
477 if (strAccount == strSentAccount)
479 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
483 CRITICAL_BLOCK(pwallet->cs_wallet)
485 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
487 if (pwallet->mapAddressBook.count(r.first))
489 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
490 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
491 nReceived += r.second;
493 else if (strAccount.empty())
495 nReceived += r.second;
501 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
505 const int COPY_DEPTH = 3;
506 if (SetMerkleBranch() < COPY_DEPTH)
508 vector<uint256> vWorkQueue;
509 BOOST_FOREACH(const CTxIn& txin, vin)
510 vWorkQueue.push_back(txin.prevout.hash);
512 // This critsect is OK because txdb is already open
513 CRITICAL_BLOCK(pwallet->cs_wallet)
515 map<uint256, const CMerkleTx*> mapWalletPrev;
516 set<uint256> setAlreadyDone;
517 for (unsigned int i = 0; i < vWorkQueue.size(); i++)
519 uint256 hash = vWorkQueue[i];
520 if (setAlreadyDone.count(hash))
522 setAlreadyDone.insert(hash);
525 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
526 if (mi != pwallet->mapWallet.end())
529 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
530 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
532 else if (mapWalletPrev.count(hash))
534 tx = *mapWalletPrev[hash];
536 else if (!fClient && txdb.ReadDiskTx(hash, tx))
542 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
546 int nDepth = tx.SetMerkleBranch();
547 vtxPrev.push_back(tx);
549 if (nDepth < COPY_DEPTH)
551 BOOST_FOREACH(const CTxIn& txin, tx.vin)
552 vWorkQueue.push_back(txin.prevout.hash);
558 reverse(vtxPrev.begin(), vtxPrev.end());
561 bool CWalletTx::WriteToDisk()
563 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
566 // Scan the block chain (starting in pindexStart) for transactions
567 // from or to us. If fUpdate is true, found transactions that already
568 // exist in the wallet will be updated.
569 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
573 CBlockIndex* pindex = pindexStart;
574 CRITICAL_BLOCK(cs_wallet)
579 block.ReadFromDisk(pindex, true);
580 BOOST_FOREACH(CTransaction& tx, block.vtx)
582 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
585 pindex = pindex->pnext;
591 void CWallet::ReacceptWalletTransactions()
595 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
598 vector<CDiskTxPos> vMissingTx;
599 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
601 CWalletTx& wtx = item.second;
602 if (wtx.IsCoinBase() && wtx.IsSpent(0))
606 bool fUpdated = false;
607 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
609 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
610 if (txindex.vSpent.size() != wtx.vout.size())
612 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
615 for (unsigned int i = 0; i < txindex.vSpent.size(); i++)
619 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
623 vMissingTx.push_back(txindex.vSpent[i]);
628 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
635 // Reaccept any txes of ours that aren't already in a block
636 if (!wtx.IsCoinBase())
637 wtx.AcceptWalletTransaction(txdb, false);
640 if (!vMissingTx.empty())
642 // TODO: optimize this to scan just part of the block chain?
643 if (ScanForWalletTransactions(pindexGenesisBlock))
644 fRepeat = true; // Found missing transactions: re-do Reaccept.
649 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
651 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
653 if (!tx.IsCoinBase())
655 uint256 hash = tx.GetHash();
656 if (!txdb.ContainsTx(hash))
657 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
662 uint256 hash = GetHash();
663 if (!txdb.ContainsTx(hash))
665 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
666 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
671 void CWalletTx::RelayWalletTransaction()
674 RelayWalletTransaction(txdb);
677 void CWallet::ResendWalletTransactions()
679 // Do this infrequently and randomly to avoid giving away
680 // that these are our transactions.
681 static int64 nNextTime;
682 if (GetTime() < nNextTime)
684 bool fFirst = (nNextTime == 0);
685 nNextTime = GetTime() + GetRand(30 * 60);
689 // Only do it if there's been a new block since last time
690 static int64 nLastTime;
691 if (nTimeBestReceived < nLastTime)
693 nLastTime = GetTime();
695 // Rebroadcast any of our txes that aren't in a block yet
696 printf("ResendWalletTransactions()\n");
698 CRITICAL_BLOCK(cs_wallet)
700 // Sort them in chronological order
701 multimap<unsigned int, CWalletTx*> mapSorted;
702 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
704 CWalletTx& wtx = item.second;
705 // Don't rebroadcast until it's had plenty of time that
706 // it should have gotten in already by now.
707 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
708 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
710 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
712 CWalletTx& wtx = *item.second;
713 wtx.RelayWalletTransaction(txdb);
723 //////////////////////////////////////////////////////////////////////////////
729 int64 CWallet::GetBalance() const
732 CRITICAL_BLOCK(cs_wallet)
734 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
736 const CWalletTx* pcoin = &(*it).second;
737 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
739 nTotal += pcoin->GetAvailableCredit();
746 int64 CWallet::GetUnconfirmedBalance() const
749 CRITICAL_BLOCK(cs_wallet)
751 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
753 const CWalletTx* pcoin = &(*it).second;
754 if (pcoin->IsFinal() && pcoin->IsConfirmed())
756 nTotal += pcoin->GetAvailableCredit();
762 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
767 // List of values less than target
768 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
769 coinLowestLarger.first = INT64_MAX;
770 coinLowestLarger.second.first = NULL;
771 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
772 int64 nTotalLower = 0;
774 CRITICAL_BLOCK(cs_wallet)
776 vector<const CWalletTx*> vCoins;
777 vCoins.reserve(mapWallet.size());
778 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
779 vCoins.push_back(&(*it).second);
780 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
782 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
784 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
787 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
790 int nDepth = pcoin->GetDepthInMainChain();
791 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
794 for (unsigned int i = 0; i < pcoin->vout.size(); i++)
796 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
799 int64 n = pcoin->vout[i].nValue;
804 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
806 if (n == nTargetValue)
808 setCoinsRet.insert(coin.second);
809 nValueRet += coin.first;
812 else if (n < nTargetValue + CENT)
814 vValue.push_back(coin);
817 else if (n < coinLowestLarger.first)
819 coinLowestLarger = coin;
825 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
827 for (unsigned int i = 0; i < vValue.size(); ++i)
829 setCoinsRet.insert(vValue[i].second);
830 nValueRet += vValue[i].first;
835 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
837 if (coinLowestLarger.second.first == NULL)
839 setCoinsRet.insert(coinLowestLarger.second);
840 nValueRet += coinLowestLarger.first;
844 if (nTotalLower >= nTargetValue + CENT)
845 nTargetValue += CENT;
847 // Solve subset sum by stochastic approximation
848 sort(vValue.rbegin(), vValue.rend());
849 vector<char> vfIncluded;
850 vector<char> vfBest(vValue.size(), true);
851 int64 nBest = nTotalLower;
853 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
855 vfIncluded.assign(vValue.size(), false);
857 bool fReachedTarget = false;
858 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
860 for (unsigned int i = 0; i < vValue.size(); i++)
862 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
864 nTotal += vValue[i].first;
865 vfIncluded[i] = true;
866 if (nTotal >= nTargetValue)
868 fReachedTarget = true;
874 nTotal -= vValue[i].first;
875 vfIncluded[i] = false;
882 // If the next larger is still closer, return it
883 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
885 setCoinsRet.insert(coinLowestLarger.second);
886 nValueRet += coinLowestLarger.first;
889 for (unsigned int i = 0; i < vValue.size(); i++)
892 setCoinsRet.insert(vValue[i].second);
893 nValueRet += vValue[i].first;
897 printf("SelectCoins() best subset: ");
898 for (unsigned int i = 0; i < vValue.size(); i++)
900 printf("%s ", FormatMoney(vValue[i].first).c_str());
901 printf("total %s\n", FormatMoney(nBest).c_str());
907 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
909 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
910 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
911 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
917 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
920 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
926 if (vecSend.empty() || nValue < 0)
929 wtxNew.pwallet = this;
931 CRITICAL_BLOCK(cs_main)
932 CRITICAL_BLOCK(cs_wallet)
934 // txdb must be opened before the mapWallet lock
937 nFeeRet = nTransactionFee;
942 wtxNew.fFromMe = true;
944 int64 nTotalValue = nValue + nFeeRet;
945 double dPriority = 0;
946 // vouts to the payees
947 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
948 wtxNew.vout.push_back(CTxOut(s.second, s.first));
950 // Choose coins to use
951 set<pair<const CWalletTx*,unsigned int> > setCoins;
953 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
955 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
957 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
958 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
961 int64 nChange = nValueIn - nValue - nFeeRet;
962 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
963 // or until nChange becomes zero
964 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
966 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
967 nChange -= nMoveToFee;
968 nFeeRet += nMoveToFee;
973 // Note: We use a new key here to keep it from being obvious which side is the change.
974 // The drawback is that by not reusing a previous key, the change may be lost if a
975 // backup is restored, if the backup doesn't have the new private key for the change.
976 // If we reused the old key, it would be possible to add code to look for and
977 // rediscover unknown transactions that were written with keys of ours to recover
978 // post-backup change.
980 // Reserve a new key pair from key pool
981 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
982 // assert(mapKeys.count(vchPubKey));
984 // Fill a vout to ourself, using same address type as the payment
985 CScript scriptChange;
986 if (vecSend[0].first.GetBitcoinAddress().IsValid())
987 scriptChange.SetBitcoinAddress(vchPubKey);
989 scriptChange << vchPubKey << OP_CHECKSIG;
991 // Insert change txn at random position:
992 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
993 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
996 reservekey.ReturnKey();
999 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
1000 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
1004 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
1005 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1009 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1010 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1012 dPriority /= nBytes;
1014 // Check that enough fee is included
1015 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1016 bool fAllowFree = CTransaction::AllowFree(dPriority);
1017 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1018 if (nFeeRet < max(nPayFee, nMinFee))
1020 nFeeRet = max(nPayFee, nMinFee);
1024 // Fill vtxPrev by copying from previous transactions vtxPrev
1025 wtxNew.AddSupportingTransactions(txdb);
1026 wtxNew.fTimeReceivedIsTxTime = true;
1035 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1037 vector< pair<CScript, int64> > vecSend;
1038 vecSend.push_back(make_pair(scriptPubKey, nValue));
1039 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1042 // Call after CreateTransaction unless you want to abort
1043 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1045 CRITICAL_BLOCK(cs_main)
1046 CRITICAL_BLOCK(cs_wallet)
1048 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1050 // This is only to keep the database open to defeat the auto-flush for the
1051 // duration of this scope. This is the only place where this optimization
1052 // maybe makes sense; please don't do it anywhere else.
1053 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1055 // Take key pair from key pool so it won't be used again
1056 reservekey.KeepKey();
1058 // Add tx to wallet, because if it has change it's also ours,
1059 // otherwise just for transaction history.
1060 AddToWallet(wtxNew);
1062 // Mark old coins as spent
1063 set<CWalletTx*> setCoins;
1064 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1066 CWalletTx &coin = mapWallet[txin.prevout.hash];
1067 coin.pwallet = this;
1068 coin.MarkSpent(txin.prevout.n);
1070 vWalletUpdated.push_back(coin.GetHash());
1077 // Track how many getdata requests our transaction gets
1078 mapRequestCount[wtxNew.GetHash()] = 0;
1081 if (!wtxNew.AcceptToMemoryPool())
1083 // This must not fail. The transaction has already been signed and recorded.
1084 printf("CommitTransaction() : Error: Transaction not valid");
1087 wtxNew.RelayWalletTransaction();
1096 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1098 CReserveKey reservekey(this);
1103 string strError = _("Error: Wallet locked, unable to create transaction ");
1104 printf("SendMoney() : %s", strError.c_str());
1107 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1110 if (nValue + nFeeRequired > GetBalance())
1111 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());
1113 strError = _("Error: Transaction creation failed ");
1114 printf("SendMoney() : %s", strError.c_str());
1118 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1121 if (!CommitTransaction(wtxNew, reservekey))
1122 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.");
1130 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1134 return _("Invalid amount");
1135 if (nValue + nTransactionFee > GetBalance())
1136 return _("Insufficient funds");
1138 // Parse bitcoin address
1139 CScript scriptPubKey;
1140 scriptPubKey.SetBitcoinAddress(address);
1142 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1148 int CWallet::LoadWallet(bool& fFirstRunRet)
1152 fFirstRunRet = false;
1153 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1154 if (nLoadWalletRet == DB_NEED_REWRITE)
1156 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1159 // Note: can't top-up keypool here, because wallet is locked.
1160 // User will be prompted to unlock wallet the next operation
1161 // the requires a new key.
1163 nLoadWalletRet = DB_NEED_REWRITE;
1166 if (nLoadWalletRet != DB_LOAD_OK)
1167 return nLoadWalletRet;
1168 fFirstRunRet = vchDefaultKey.empty();
1170 if (!HaveKey(Hash160(vchDefaultKey)))
1172 // Create new keyUser and set as default key
1173 RandAddSeedPerfmon();
1175 std::vector<unsigned char> newDefaultKey;
1176 if (!GetKeyFromPool(newDefaultKey, false))
1177 return DB_LOAD_FAIL;
1178 SetDefaultKey(newDefaultKey);
1179 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1180 return DB_LOAD_FAIL;
1183 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1188 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1190 mapAddressBook[address] = strName;
1193 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1196 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1198 mapAddressBook.erase(address);
1201 return CWalletDB(strWalletFile).EraseName(address.ToString());
1205 void CWallet::PrintWallet(const CBlock& block)
1207 CRITICAL_BLOCK(cs_wallet)
1209 if (mapWallet.count(block.vtx[0].GetHash()))
1211 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1212 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1218 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1220 CRITICAL_BLOCK(cs_wallet)
1222 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1223 if (mi != mapWallet.end())
1232 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1236 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1239 vchDefaultKey = vchPubKey;
1243 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1245 if (!pwallet->fFileBacked)
1247 strWalletFileOut = pwallet->strWalletFile;
1252 // Mark old keypool keys as used,
1253 // and generate all new keys
1255 bool CWallet::NewKeyPool()
1257 CRITICAL_BLOCK(cs_wallet)
1259 CWalletDB walletdb(strWalletFile);
1260 BOOST_FOREACH(int64 nIndex, setKeyPool)
1261 walletdb.ErasePool(nIndex);
1267 int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
1268 for (int i = 0; i < nKeys; i++)
1271 walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
1272 setKeyPool.insert(nIndex);
1274 printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
1279 bool CWallet::TopUpKeyPool()
1281 CRITICAL_BLOCK(cs_wallet)
1286 CWalletDB walletdb(strWalletFile);
1289 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1290 while (setKeyPool.size() < nTargetSize+1)
1293 if (!setKeyPool.empty())
1294 nEnd = *(--setKeyPool.end()) + 1;
1295 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1296 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1297 setKeyPool.insert(nEnd);
1298 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1304 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1307 keypool.vchPubKey.clear();
1308 CRITICAL_BLOCK(cs_wallet)
1313 // Get the oldest key
1314 if(setKeyPool.empty())
1317 CWalletDB walletdb(strWalletFile);
1319 nIndex = *(setKeyPool.begin());
1320 setKeyPool.erase(setKeyPool.begin());
1321 if (!walletdb.ReadPool(nIndex, keypool))
1322 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1323 if (!HaveKey(Hash160(keypool.vchPubKey)))
1324 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1325 assert(!keypool.vchPubKey.empty());
1326 printf("keypool reserve %"PRI64d"\n", nIndex);
1330 void CWallet::KeepKey(int64 nIndex)
1332 // Remove from key pool
1335 CWalletDB walletdb(strWalletFile);
1336 walletdb.ErasePool(nIndex);
1338 printf("keypool keep %"PRI64d"\n", nIndex);
1341 void CWallet::ReturnKey(int64 nIndex)
1343 // Return to key pool
1344 CRITICAL_BLOCK(cs_wallet)
1345 setKeyPool.insert(nIndex);
1346 printf("keypool return %"PRI64d"\n", nIndex);
1349 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1353 CRITICAL_BLOCK(cs_wallet)
1355 ReserveKeyFromKeyPool(nIndex, keypool);
1358 if (fAllowReuse && !vchDefaultKey.empty())
1360 result = vchDefaultKey;
1363 if (IsLocked()) return false;
1364 result = GenerateNewKey();
1368 result = keypool.vchPubKey;
1373 int64 CWallet::GetOldestKeyPoolTime()
1377 ReserveKeyFromKeyPool(nIndex, keypool);
1381 return keypool.nTime;
1384 vector<unsigned char> CReserveKey::GetReservedKey()
1389 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1391 vchPubKey = keypool.vchPubKey;
1394 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1395 vchPubKey = pwallet->vchDefaultKey;
1398 assert(!vchPubKey.empty());
1402 void CReserveKey::KeepKey()
1405 pwallet->KeepKey(nIndex);
1410 void CReserveKey::ReturnKey()
1413 pwallet->ReturnKey(nIndex);