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.
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 SecureString& 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 SecureString& strOldWalletPassphrase, const SecureString& 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 SecureString& 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 // Add a transaction to the wallet, or update it.
301 // pblock is optional, but should be provided if the transaction is known to be in a block.
302 // If fUpdate is true, existing transactions will be updated.
303 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
305 uint256 hash = tx.GetHash();
306 CRITICAL_BLOCK(cs_wallet)
308 bool fExisted = mapWallet.count(hash);
309 if (fExisted && !fUpdate) return false;
310 if (fExisted || IsMine(tx) || IsFromMe(tx))
312 CWalletTx wtx(this,tx);
313 // Get merkle branch if transaction was found in a block
315 wtx.SetMerkleBranch(pblock);
316 return AddToWallet(wtx);
319 WalletUpdateSpent(tx);
324 bool CWallet::EraseFromWallet(uint256 hash)
328 CRITICAL_BLOCK(cs_wallet)
330 if (mapWallet.erase(hash))
331 CWalletDB(strWalletFile).EraseTx(hash);
337 bool CWallet::IsMine(const CTxIn &txin) const
339 CRITICAL_BLOCK(cs_wallet)
341 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
342 if (mi != mapWallet.end())
344 const CWalletTx& prev = (*mi).second;
345 if (txin.prevout.n < prev.vout.size())
346 if (IsMine(prev.vout[txin.prevout.n]))
353 int64 CWallet::GetDebit(const CTxIn &txin) const
355 CRITICAL_BLOCK(cs_wallet)
357 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
358 if (mi != mapWallet.end())
360 const CWalletTx& prev = (*mi).second;
361 if (txin.prevout.n < prev.vout.size())
362 if (IsMine(prev.vout[txin.prevout.n]))
363 return prev.vout[txin.prevout.n].nValue;
369 int64 CWalletTx::GetTxTime() const
371 return nTimeReceived;
374 int CWalletTx::GetRequestCount() const
376 // Returns -1 if it wasn't being tracked
378 CRITICAL_BLOCK(pwallet->cs_wallet)
385 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
386 if (mi != pwallet->mapRequestCount.end())
387 nRequests = (*mi).second;
392 // Did anyone request this transaction?
393 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
394 if (mi != pwallet->mapRequestCount.end())
396 nRequests = (*mi).second;
398 // How about the block it's in?
399 if (nRequests == 0 && hashBlock != 0)
401 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
402 if (mi != pwallet->mapRequestCount.end())
403 nRequests = (*mi).second;
405 nRequests = 1; // If it's in someone else's block it must have got out
413 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
414 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
416 nGeneratedImmature = nGeneratedMature = nFee = 0;
417 listReceived.clear();
419 strSentAccount = strFromAccount;
423 if (GetBlocksToMaturity() > 0)
424 nGeneratedImmature = pwallet->GetCredit(*this);
426 nGeneratedMature = GetCredit();
431 int64 nDebit = GetDebit();
432 if (nDebit > 0) // debit>0 means we signed/sent this transaction
434 int64 nValueOut = GetValueOut();
435 nFee = nDebit - nValueOut;
438 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
439 // but non-standard clients might (so return a list of address/amount pairs)
440 BOOST_FOREACH(const CTxOut& txout, vout)
442 CBitcoinAddress address;
443 vector<unsigned char> vchPubKey;
444 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
446 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
447 this->GetHash().ToString().c_str());
448 address = " unknown ";
451 // Don't report 'change' txouts
452 if (nDebit > 0 && pwallet->IsChange(txout))
456 listSent.push_back(make_pair(address, txout.nValue));
458 if (pwallet->IsMine(txout))
459 listReceived.push_back(make_pair(address, txout.nValue));
464 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
465 int64& nSent, int64& nFee) const
467 nGenerated = nReceived = nSent = nFee = 0;
469 int64 allGeneratedImmature, allGeneratedMature, allFee;
470 allGeneratedImmature = allGeneratedMature = allFee = 0;
471 string strSentAccount;
472 list<pair<CBitcoinAddress, int64> > listReceived;
473 list<pair<CBitcoinAddress, int64> > listSent;
474 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
476 if (strAccount == "")
477 nGenerated = allGeneratedMature;
478 if (strAccount == strSentAccount)
480 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
484 CRITICAL_BLOCK(pwallet->cs_wallet)
486 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
488 if (pwallet->mapAddressBook.count(r.first))
490 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
491 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
492 nReceived += r.second;
494 else if (strAccount.empty())
496 nReceived += r.second;
502 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
506 const int COPY_DEPTH = 3;
507 if (SetMerkleBranch() < COPY_DEPTH)
509 vector<uint256> vWorkQueue;
510 BOOST_FOREACH(const CTxIn& txin, vin)
511 vWorkQueue.push_back(txin.prevout.hash);
513 // This critsect is OK because txdb is already open
514 CRITICAL_BLOCK(pwallet->cs_wallet)
516 map<uint256, const CMerkleTx*> mapWalletPrev;
517 set<uint256> setAlreadyDone;
518 for (int i = 0; i < vWorkQueue.size(); i++)
520 uint256 hash = vWorkQueue[i];
521 if (setAlreadyDone.count(hash))
523 setAlreadyDone.insert(hash);
526 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
527 if (mi != pwallet->mapWallet.end())
530 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
531 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
533 else if (mapWalletPrev.count(hash))
535 tx = *mapWalletPrev[hash];
537 else if (!fClient && txdb.ReadDiskTx(hash, tx))
543 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
547 int nDepth = tx.SetMerkleBranch();
548 vtxPrev.push_back(tx);
550 if (nDepth < COPY_DEPTH)
551 BOOST_FOREACH(const CTxIn& txin, tx.vin)
552 vWorkQueue.push_back(txin.prevout.hash);
557 reverse(vtxPrev.begin(), vtxPrev.end());
560 bool CWalletTx::WriteToDisk()
562 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
565 // Scan the block chain (starting in pindexStart) for transactions
566 // from or to us. If fUpdate is true, found transactions that already
567 // exist in the wallet will be updated.
568 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
572 CBlockIndex* pindex = pindexStart;
573 CRITICAL_BLOCK(cs_wallet)
578 block.ReadFromDisk(pindex, true);
579 BOOST_FOREACH(CTransaction& tx, block.vtx)
581 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
584 pindex = pindex->pnext;
590 void CWallet::ReacceptWalletTransactions()
594 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
597 vector<CDiskTxPos> vMissingTx;
598 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
600 CWalletTx& wtx = item.second;
601 if (wtx.IsCoinBase() && wtx.IsSpent(0))
605 bool fUpdated = false;
606 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
608 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
609 if (txindex.vSpent.size() != wtx.vout.size())
611 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
614 for (int i = 0; i < txindex.vSpent.size(); i++)
618 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
622 vMissingTx.push_back(txindex.vSpent[i]);
627 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
634 // Reaccept any txes of ours that aren't already in a block
635 if (!wtx.IsCoinBase())
636 wtx.AcceptWalletTransaction(txdb, false);
639 if (!vMissingTx.empty())
641 // TODO: optimize this to scan just part of the block chain?
642 if (ScanForWalletTransactions(pindexGenesisBlock))
643 fRepeat = true; // Found missing transactions: re-do Reaccept.
648 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
650 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
652 if (!tx.IsCoinBase())
654 uint256 hash = tx.GetHash();
655 if (!txdb.ContainsTx(hash))
656 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
661 uint256 hash = GetHash();
662 if (!txdb.ContainsTx(hash))
664 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
665 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
670 void CWalletTx::RelayWalletTransaction()
673 RelayWalletTransaction(txdb);
676 void CWallet::ResendWalletTransactions()
678 // Do this infrequently and randomly to avoid giving away
679 // that these are our transactions.
680 static int64 nNextTime;
681 if (GetTime() < nNextTime)
683 bool fFirst = (nNextTime == 0);
684 nNextTime = GetTime() + GetRand(30 * 60);
688 // Only do it if there's been a new block since last time
689 static int64 nLastTime;
690 if (nTimeBestReceived < nLastTime)
692 nLastTime = GetTime();
694 // Rebroadcast any of our txes that aren't in a block yet
695 printf("ResendWalletTransactions()\n");
697 CRITICAL_BLOCK(cs_wallet)
699 // Sort them in chronological order
700 multimap<unsigned int, CWalletTx*> mapSorted;
701 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
703 CWalletTx& wtx = item.second;
704 // Don't rebroadcast until it's had plenty of time that
705 // it should have gotten in already by now.
706 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
707 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
709 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
711 CWalletTx& wtx = *item.second;
712 wtx.RelayWalletTransaction(txdb);
722 //////////////////////////////////////////////////////////////////////////////
728 int64 CWallet::GetBalance() const
731 CRITICAL_BLOCK(cs_wallet)
733 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
735 const CWalletTx* pcoin = &(*it).second;
736 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
738 nTotal += pcoin->GetAvailableCredit();
745 int64 CWallet::GetUnconfirmedBalance() const
748 CRITICAL_BLOCK(cs_wallet)
750 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
752 const CWalletTx* pcoin = &(*it).second;
753 if (pcoin->IsFinal() && pcoin->IsConfirmed())
755 nTotal += pcoin->GetAvailableCredit();
761 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
766 // List of values less than target
767 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
768 coinLowestLarger.first = INT64_MAX;
769 coinLowestLarger.second.first = NULL;
770 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
771 int64 nTotalLower = 0;
773 CRITICAL_BLOCK(cs_wallet)
775 vector<const CWalletTx*> vCoins;
776 vCoins.reserve(mapWallet.size());
777 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
778 vCoins.push_back(&(*it).second);
779 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
781 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
783 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
786 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
789 int nDepth = pcoin->GetDepthInMainChain();
790 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
793 for (int i = 0; i < pcoin->vout.size(); i++)
795 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
798 int64 n = pcoin->vout[i].nValue;
803 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
805 if (n == nTargetValue)
807 setCoinsRet.insert(coin.second);
808 nValueRet += coin.first;
811 else if (n < nTargetValue + CENT)
813 vValue.push_back(coin);
816 else if (n < coinLowestLarger.first)
818 coinLowestLarger = coin;
824 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
826 for (int i = 0; i < vValue.size(); ++i)
828 setCoinsRet.insert(vValue[i].second);
829 nValueRet += vValue[i].first;
834 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
836 if (coinLowestLarger.second.first == NULL)
838 setCoinsRet.insert(coinLowestLarger.second);
839 nValueRet += coinLowestLarger.first;
843 if (nTotalLower >= nTargetValue + CENT)
844 nTargetValue += CENT;
846 // Solve subset sum by stochastic approximation
847 sort(vValue.rbegin(), vValue.rend());
848 vector<char> vfIncluded;
849 vector<char> vfBest(vValue.size(), true);
850 int64 nBest = nTotalLower;
852 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
854 vfIncluded.assign(vValue.size(), false);
856 bool fReachedTarget = false;
857 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
859 for (int i = 0; i < vValue.size(); i++)
861 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
863 nTotal += vValue[i].first;
864 vfIncluded[i] = true;
865 if (nTotal >= nTargetValue)
867 fReachedTarget = true;
873 nTotal -= vValue[i].first;
874 vfIncluded[i] = false;
881 // If the next larger is still closer, return it
882 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
884 setCoinsRet.insert(coinLowestLarger.second);
885 nValueRet += coinLowestLarger.first;
888 for (int i = 0; i < vValue.size(); i++)
891 setCoinsRet.insert(vValue[i].second);
892 nValueRet += vValue[i].first;
896 printf("SelectCoins() best subset: ");
897 for (int i = 0; i < vValue.size(); i++)
899 printf("%s ", FormatMoney(vValue[i].first).c_str());
900 printf("total %s\n", FormatMoney(nBest).c_str());
906 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
908 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
909 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
910 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
916 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
919 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
925 if (vecSend.empty() || nValue < 0)
928 wtxNew.pwallet = this;
930 CRITICAL_BLOCK(cs_main)
931 CRITICAL_BLOCK(cs_wallet)
933 // txdb must be opened before the mapWallet lock
936 nFeeRet = nTransactionFee;
941 wtxNew.fFromMe = true;
943 int64 nTotalValue = nValue + nFeeRet;
944 double dPriority = 0;
945 // vouts to the payees
946 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
947 wtxNew.vout.push_back(CTxOut(s.second, s.first));
949 // Choose coins to use
950 set<pair<const CWalletTx*,unsigned int> > setCoins;
952 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
954 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
956 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
957 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
960 int64 nChange = nValueIn - nValue - nFeeRet;
961 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
962 // or until nChange becomes zero
963 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
965 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
966 nChange -= nMoveToFee;
967 nFeeRet += nMoveToFee;
972 // Note: We use a new key here to keep it from being obvious which side is the change.
973 // The drawback is that by not reusing a previous key, the change may be lost if a
974 // backup is restored, if the backup doesn't have the new private key for the change.
975 // If we reused the old key, it would be possible to add code to look for and
976 // rediscover unknown transactions that were written with keys of ours to recover
977 // post-backup change.
979 // Reserve a new key pair from key pool
980 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
981 // assert(mapKeys.count(vchPubKey));
983 // Fill a vout to ourself, using same address type as the payment
984 CScript scriptChange;
985 if (vecSend[0].first.GetBitcoinAddress().IsValid())
986 scriptChange.SetBitcoinAddress(vchPubKey);
988 scriptChange << vchPubKey << OP_CHECKSIG;
990 // Insert change txn at random position:
991 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
992 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
995 reservekey.ReturnKey();
998 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
999 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
1003 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
1004 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1008 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1009 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1011 dPriority /= nBytes;
1013 // Check that enough fee is included
1014 int64 nPayFee = nTransactionFee; // ppcoin: simplify tx fee
1015 int64 nMinFee = wtxNew.GetMinFee(1, false);
1016 if (nFeeRet < max(nPayFee, nMinFee))
1018 nFeeRet = max(nPayFee, nMinFee);
1022 // Fill vtxPrev by copying from previous transactions vtxPrev
1023 wtxNew.AddSupportingTransactions(txdb);
1024 wtxNew.fTimeReceivedIsTxTime = true;
1033 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1035 vector< pair<CScript, int64> > vecSend;
1036 vecSend.push_back(make_pair(scriptPubKey, nValue));
1037 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1040 // Call after CreateTransaction unless you want to abort
1041 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1043 CRITICAL_BLOCK(cs_main)
1044 CRITICAL_BLOCK(cs_wallet)
1046 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1048 // This is only to keep the database open to defeat the auto-flush for the
1049 // duration of this scope. This is the only place where this optimization
1050 // maybe makes sense; please don't do it anywhere else.
1051 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1053 // Take key pair from key pool so it won't be used again
1054 reservekey.KeepKey();
1056 // Add tx to wallet, because if it has change it's also ours,
1057 // otherwise just for transaction history.
1058 AddToWallet(wtxNew);
1060 // Mark old coins as spent
1061 set<CWalletTx*> setCoins;
1062 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1064 CWalletTx &coin = mapWallet[txin.prevout.hash];
1065 coin.pwallet = this;
1066 coin.MarkSpent(txin.prevout.n);
1068 vWalletUpdated.push_back(coin.GetHash());
1075 // Track how many getdata requests our transaction gets
1076 mapRequestCount[wtxNew.GetHash()] = 0;
1079 if (!wtxNew.AcceptToMemoryPool())
1081 // This must not fail. The transaction has already been signed and recorded.
1082 printf("CommitTransaction() : Error: Transaction not valid");
1085 wtxNew.RelayWalletTransaction();
1094 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1096 CReserveKey reservekey(this);
1101 string strError = _("Error: Wallet locked, unable to create transaction ");
1102 printf("SendMoney() : %s", strError.c_str());
1105 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1108 if (nValue + nFeeRequired > GetBalance())
1109 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());
1111 strError = _("Error: Transaction creation failed ");
1112 printf("SendMoney() : %s", strError.c_str());
1116 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1119 if (!CommitTransaction(wtxNew, reservekey))
1120 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.");
1128 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1132 return _("Invalid amount");
1133 if (nValue + nTransactionFee > GetBalance())
1134 return _("Insufficient funds");
1136 // Parse bitcoin address
1137 CScript scriptPubKey;
1138 scriptPubKey.SetBitcoinAddress(address);
1140 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1146 int CWallet::LoadWallet(bool& fFirstRunRet)
1150 fFirstRunRet = false;
1151 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1152 if (nLoadWalletRet == DB_NEED_REWRITE)
1154 if (CDB::Rewrite(strWalletFile, "\x04pool"))
1157 // Note: can't top-up keypool here, because wallet is locked.
1158 // User will be prompted to unlock wallet the next operation
1159 // the requires a new key.
1161 nLoadWalletRet = DB_NEED_REWRITE;
1164 if (nLoadWalletRet != DB_LOAD_OK)
1165 return nLoadWalletRet;
1166 fFirstRunRet = vchDefaultKey.empty();
1168 if (!HaveKey(Hash160(vchDefaultKey)))
1170 // Create new keyUser and set as default key
1171 RandAddSeedPerfmon();
1173 std::vector<unsigned char> newDefaultKey;
1174 if (!GetKeyFromPool(newDefaultKey, false))
1175 return DB_LOAD_FAIL;
1176 SetDefaultKey(newDefaultKey);
1177 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1178 return DB_LOAD_FAIL;
1181 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1186 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1188 mapAddressBook[address] = strName;
1191 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1194 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1196 mapAddressBook.erase(address);
1199 return CWalletDB(strWalletFile).EraseName(address.ToString());
1203 void CWallet::PrintWallet(const CBlock& block)
1205 CRITICAL_BLOCK(cs_wallet)
1207 if (mapWallet.count(block.vtx[0].GetHash()))
1209 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1210 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1216 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1218 CRITICAL_BLOCK(cs_wallet)
1220 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1221 if (mi != mapWallet.end())
1230 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1234 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1237 vchDefaultKey = vchPubKey;
1241 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1243 if (!pwallet->fFileBacked)
1245 strWalletFileOut = pwallet->strWalletFile;
1250 // Mark old keypool keys as used,
1251 // and generate all new keys
1253 bool CWallet::NewKeyPool()
1255 CRITICAL_BLOCK(cs_wallet)
1257 CWalletDB walletdb(strWalletFile);
1258 BOOST_FOREACH(int64 nIndex, setKeyPool)
1259 walletdb.ErasePool(nIndex);
1265 int64 nKeys = max(GetArg("-keypool", 100), (int64)0);
1266 for (int i = 0; i < nKeys; i++)
1269 walletdb.WritePool(nIndex, CKeyPool(GenerateNewKey()));
1270 setKeyPool.insert(nIndex);
1272 printf("CWallet::NewKeyPool wrote %"PRI64d" new keys\n", nKeys);
1277 bool CWallet::TopUpKeyPool()
1279 CRITICAL_BLOCK(cs_wallet)
1284 CWalletDB walletdb(strWalletFile);
1287 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1288 while (setKeyPool.size() < nTargetSize+1)
1291 if (!setKeyPool.empty())
1292 nEnd = *(--setKeyPool.end()) + 1;
1293 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1294 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1295 setKeyPool.insert(nEnd);
1296 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1302 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1305 keypool.vchPubKey.clear();
1306 CRITICAL_BLOCK(cs_wallet)
1311 // Get the oldest key
1312 if(setKeyPool.empty())
1315 CWalletDB walletdb(strWalletFile);
1317 nIndex = *(setKeyPool.begin());
1318 setKeyPool.erase(setKeyPool.begin());
1319 if (!walletdb.ReadPool(nIndex, keypool))
1320 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1321 if (!HaveKey(Hash160(keypool.vchPubKey)))
1322 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1323 assert(!keypool.vchPubKey.empty());
1324 printf("keypool reserve %"PRI64d"\n", nIndex);
1328 void CWallet::KeepKey(int64 nIndex)
1330 // Remove from key pool
1333 CWalletDB walletdb(strWalletFile);
1334 walletdb.ErasePool(nIndex);
1336 printf("keypool keep %"PRI64d"\n", nIndex);
1339 void CWallet::ReturnKey(int64 nIndex)
1341 // Return to key pool
1342 CRITICAL_BLOCK(cs_wallet)
1343 setKeyPool.insert(nIndex);
1344 printf("keypool return %"PRI64d"\n", nIndex);
1347 bool CWallet::GetKeyFromPool(vector<unsigned char>& result, bool fAllowReuse)
1351 CRITICAL_BLOCK(cs_wallet)
1353 ReserveKeyFromKeyPool(nIndex, keypool);
1356 if (fAllowReuse && !vchDefaultKey.empty())
1358 result = vchDefaultKey;
1361 if (IsLocked()) return false;
1362 result = GenerateNewKey();
1366 result = keypool.vchPubKey;
1371 int64 CWallet::GetOldestKeyPoolTime()
1375 ReserveKeyFromKeyPool(nIndex, keypool);
1379 return keypool.nTime;
1382 vector<unsigned char> CReserveKey::GetReservedKey()
1387 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1389 vchPubKey = keypool.vchPubKey;
1392 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1393 vchPubKey = pwallet->vchDefaultKey;
1396 assert(!vchPubKey.empty());
1400 void CReserveKey::KeepKey()
1403 pwallet->KeepKey(nIndex);
1408 void CReserveKey::ReturnKey()
1411 pwallet->ReturnKey(nIndex);