1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
8 #include "cryptopp/sha.h"
14 //////////////////////////////////////////////////////////////////////////////
19 bool CWallet::AddKey(const CKey& key)
21 if (!CCryptoKeyStore::AddKey(key))
26 return CWalletDB(strWalletFile).WriteKey(key.GetPubKey(), key.GetPrivKey());
30 bool CWallet::AddCryptedKey(const vector<unsigned char> &vchPubKey, const vector<unsigned char> &vchCryptedSecret)
32 if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
36 CRITICAL_BLOCK(cs_wallet)
38 if (pwalletdbEncryption)
39 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
41 return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
45 bool CWallet::Unlock(const string& 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 string& strOldWalletPassphrase, const string& 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 string& strWalletPassphrase)
130 CKeyingMaterial vMasterKey;
131 RandAddSeedPerfmon();
133 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
134 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
136 CMasterKey kMasterKey;
138 RandAddSeedPerfmon();
139 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
140 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
143 int64 nStartTime = GetTimeMillis();
144 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
145 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
147 nStartTime = GetTimeMillis();
148 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
149 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
151 if (kMasterKey.nDeriveIterations < 25000)
152 kMasterKey.nDeriveIterations = 25000;
154 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
156 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
158 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
161 CRITICAL_BLOCK(cs_wallet)
163 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
166 pwalletdbEncryption = new CWalletDB(strWalletFile);
167 pwalletdbEncryption->TxnBegin();
168 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
171 if (!EncryptKeys(vMasterKey))
174 pwalletdbEncryption->TxnAbort();
175 exit(1); //We now probably have half of our keys encrypted in memory, and half not...die and let the user reload their unencrypted wallet.
180 CCorruptAddress corruptAddress;
181 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
182 if (!pwalletdbEncryption->TxnCommit())
183 exit(1); //We now have keys encrypted in memory, but no on disk...die to avoid confusion and let the user reload their unencrypted wallet.
185 pwalletdbEncryption->Close();
186 pwalletdbEncryption = NULL;
195 void CWallet::WalletUpdateSpent(const CTransaction &tx)
197 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
198 // Update the wallet spent flag if it doesn't know due to wallet.dat being
199 // restored from backup or the user making copies of wallet.dat.
200 CRITICAL_BLOCK(cs_wallet)
202 BOOST_FOREACH(const CTxIn& txin, tx.vin)
204 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
205 if (mi != mapWallet.end())
207 CWalletTx& wtx = (*mi).second;
208 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
210 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
211 wtx.MarkSpent(txin.prevout.n);
213 vWalletUpdated.push_back(txin.prevout.hash);
220 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
222 uint256 hash = wtxIn.GetHash();
223 CRITICAL_BLOCK(cs_wallet)
225 // Inserts only if not already there, returns tx inserted or tx found
226 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
227 CWalletTx& wtx = (*ret.first).second;
229 bool fInsertedNew = ret.second;
231 wtx.nTimeReceived = GetAdjustedTime();
233 bool fUpdated = false;
237 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
239 wtx.hashBlock = wtxIn.hashBlock;
242 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
244 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
245 wtx.nIndex = wtxIn.nIndex;
248 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
250 wtx.fFromMe = wtxIn.fFromMe;
253 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
257 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
260 if (fInsertedNew || fUpdated)
261 if (!wtx.WriteToDisk())
264 // If default receiving address gets used, replace it with a new one
265 CScript scriptDefaultKey;
266 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
267 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
269 if (txout.scriptPubKey == scriptDefaultKey)
271 SetDefaultKey(GetOrReuseKeyFromPool());
272 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
277 vWalletUpdated.push_back(hash);
279 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
280 WalletUpdateSpent(wtx);
288 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
290 uint256 hash = tx.GetHash();
291 CRITICAL_BLOCK(cs_wallet)
293 bool fExisted = mapWallet.count(hash);
294 if (fExisted && !fUpdate) return false;
295 if (fExisted || IsMine(tx) || IsFromMe(tx))
297 CWalletTx wtx(this,tx);
298 // Get merkle branch if transaction was found in a block
300 wtx.SetMerkleBranch(pblock);
301 return AddToWallet(wtx);
304 WalletUpdateSpent(tx);
309 bool CWallet::EraseFromWallet(uint256 hash)
313 CRITICAL_BLOCK(cs_wallet)
315 if (mapWallet.erase(hash))
316 CWalletDB(strWalletFile).EraseTx(hash);
322 bool CWallet::IsMine(const CTxIn &txin) const
324 CRITICAL_BLOCK(cs_wallet)
326 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
327 if (mi != mapWallet.end())
329 const CWalletTx& prev = (*mi).second;
330 if (txin.prevout.n < prev.vout.size())
331 if (IsMine(prev.vout[txin.prevout.n]))
338 int64 CWallet::GetDebit(const CTxIn &txin) const
340 CRITICAL_BLOCK(cs_wallet)
342 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
343 if (mi != mapWallet.end())
345 const CWalletTx& prev = (*mi).second;
346 if (txin.prevout.n < prev.vout.size())
347 if (IsMine(prev.vout[txin.prevout.n]))
348 return prev.vout[txin.prevout.n].nValue;
354 int64 CWalletTx::GetTxTime() const
356 CRITICAL_BLOCK(cs_main)
358 if (!fTimeReceivedIsTxTime && hashBlock != 0)
360 // If we did not receive the transaction directly, we rely on the block's
361 // time to figure out when it happened. We use the median over a range
362 // of blocks to try to filter out inaccurate block times.
363 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
364 if (mi != mapBlockIndex.end())
366 CBlockIndex* pindex = (*mi).second;
368 return pindex->GetMedianTime();
372 return nTimeReceived;
375 int CWalletTx::GetRequestCount() const
377 // Returns -1 if it wasn't being tracked
379 CRITICAL_BLOCK(pwallet->cs_wallet)
386 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
387 if (mi != pwallet->mapRequestCount.end())
388 nRequests = (*mi).second;
393 // Did anyone request this transaction?
394 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
395 if (mi != pwallet->mapRequestCount.end())
397 nRequests = (*mi).second;
399 // How about the block it's in?
400 if (nRequests == 0 && hashBlock != 0)
402 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
403 if (mi != pwallet->mapRequestCount.end())
404 nRequests = (*mi).second;
406 nRequests = 1; // If it's in someone else's block it must have got out
414 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
415 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
417 nGeneratedImmature = nGeneratedMature = nFee = 0;
418 listReceived.clear();
420 strSentAccount = strFromAccount;
424 if (GetBlocksToMaturity() > 0)
425 nGeneratedImmature = pwallet->GetCredit(*this);
427 nGeneratedMature = GetCredit();
432 int64 nDebit = GetDebit();
433 if (nDebit > 0) // debit>0 means we signed/sent this transaction
435 int64 nValueOut = GetValueOut();
436 nFee = nDebit - nValueOut;
439 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
440 // but non-standard clients might (so return a list of address/amount pairs)
441 BOOST_FOREACH(const CTxOut& txout, vout)
443 CBitcoinAddress address;
444 vector<unsigned char> vchPubKey;
445 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
447 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
448 this->GetHash().ToString().c_str());
449 address = " unknown ";
452 // Don't report 'change' txouts
453 if (nDebit > 0 && pwallet->IsChange(txout))
457 listSent.push_back(make_pair(address, txout.nValue));
459 if (pwallet->IsMine(txout))
460 listReceived.push_back(make_pair(address, txout.nValue));
465 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
466 int64& nSent, int64& nFee) const
468 nGenerated = nReceived = nSent = nFee = 0;
470 int64 allGeneratedImmature, allGeneratedMature, allFee;
471 allGeneratedImmature = allGeneratedMature = allFee = 0;
472 string strSentAccount;
473 list<pair<CBitcoinAddress, int64> > listReceived;
474 list<pair<CBitcoinAddress, int64> > listSent;
475 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
477 if (strAccount == "")
478 nGenerated = allGeneratedMature;
479 if (strAccount == strSentAccount)
481 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
485 CRITICAL_BLOCK(pwallet->cs_wallet)
487 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
489 if (pwallet->mapAddressBook.count(r.first))
491 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
492 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
493 nReceived += r.second;
495 else if (strAccount.empty())
497 nReceived += r.second;
503 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
507 const int COPY_DEPTH = 3;
508 if (SetMerkleBranch() < COPY_DEPTH)
510 vector<uint256> vWorkQueue;
511 BOOST_FOREACH(const CTxIn& txin, vin)
512 vWorkQueue.push_back(txin.prevout.hash);
514 // This critsect is OK because txdb is already open
515 CRITICAL_BLOCK(pwallet->cs_wallet)
517 map<uint256, const CMerkleTx*> mapWalletPrev;
518 set<uint256> setAlreadyDone;
519 for (int i = 0; i < vWorkQueue.size(); i++)
521 uint256 hash = vWorkQueue[i];
522 if (setAlreadyDone.count(hash))
524 setAlreadyDone.insert(hash);
527 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
528 if (mi != pwallet->mapWallet.end())
531 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
532 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
534 else if (mapWalletPrev.count(hash))
536 tx = *mapWalletPrev[hash];
538 else if (!fClient && txdb.ReadDiskTx(hash, tx))
544 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
548 int nDepth = tx.SetMerkleBranch();
549 vtxPrev.push_back(tx);
551 if (nDepth < COPY_DEPTH)
552 BOOST_FOREACH(const CTxIn& txin, tx.vin)
553 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 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
570 CBlockIndex* pindex = pindexStart;
571 CRITICAL_BLOCK(cs_wallet)
576 block.ReadFromDisk(pindex, true);
577 BOOST_FOREACH(CTransaction& tx, block.vtx)
579 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
582 pindex = pindex->pnext;
588 void CWallet::ReacceptWalletTransactions()
592 while (fRepeat) CRITICAL_BLOCK(cs_wallet)
595 vector<CDiskTxPos> vMissingTx;
596 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
598 CWalletTx& wtx = item.second;
599 if (wtx.IsCoinBase() && wtx.IsSpent(0))
603 bool fUpdated = false;
604 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
606 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
607 if (txindex.vSpent.size() != wtx.vout.size())
609 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
612 for (int i = 0; i < txindex.vSpent.size(); i++)
616 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
620 vMissingTx.push_back(txindex.vSpent[i]);
625 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
632 // Reaccept any txes of ours that aren't already in a block
633 if (!wtx.IsCoinBase())
634 wtx.AcceptWalletTransaction(txdb, false);
637 if (!vMissingTx.empty())
639 // TODO: optimize this to scan just part of the block chain?
640 if (ScanForWalletTransactions(pindexGenesisBlock))
641 fRepeat = true; // Found missing transactions: re-do Reaccept.
646 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
648 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
650 if (!tx.IsCoinBase())
652 uint256 hash = tx.GetHash();
653 if (!txdb.ContainsTx(hash))
654 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
659 uint256 hash = GetHash();
660 if (!txdb.ContainsTx(hash))
662 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
663 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
668 void CWalletTx::RelayWalletTransaction()
671 RelayWalletTransaction(txdb);
674 void CWallet::ResendWalletTransactions()
676 // Do this infrequently and randomly to avoid giving away
677 // that these are our transactions.
678 static int64 nNextTime;
679 if (GetTime() < nNextTime)
681 bool fFirst = (nNextTime == 0);
682 nNextTime = GetTime() + GetRand(30 * 60);
686 // Only do it if there's been a new block since last time
687 static int64 nLastTime;
688 if (nTimeBestReceived < nLastTime)
690 nLastTime = GetTime();
692 // Rebroadcast any of our txes that aren't in a block yet
693 printf("ResendWalletTransactions()\n");
695 CRITICAL_BLOCK(cs_wallet)
697 // Sort them in chronological order
698 multimap<unsigned int, CWalletTx*> mapSorted;
699 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
701 CWalletTx& wtx = item.second;
702 // Don't rebroadcast until it's had plenty of time that
703 // it should have gotten in already by now.
704 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
705 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
707 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
709 CWalletTx& wtx = *item.second;
710 wtx.RelayWalletTransaction(txdb);
720 //////////////////////////////////////////////////////////////////////////////
726 int64 CWallet::GetBalance() const
729 CRITICAL_BLOCK(cs_wallet)
731 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
733 const CWalletTx* pcoin = &(*it).second;
734 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
736 nTotal += pcoin->GetAvailableCredit();
744 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
749 // List of values less than target
750 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
751 coinLowestLarger.first = INT64_MAX;
752 coinLowestLarger.second.first = NULL;
753 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
754 int64 nTotalLower = 0;
756 CRITICAL_BLOCK(cs_wallet)
758 vector<const CWalletTx*> vCoins;
759 vCoins.reserve(mapWallet.size());
760 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
761 vCoins.push_back(&(*it).second);
762 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
764 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
766 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
769 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
772 int nDepth = pcoin->GetDepthInMainChain();
773 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
776 for (int i = 0; i < pcoin->vout.size(); i++)
778 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
781 int64 n = pcoin->vout[i].nValue;
786 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
788 if (n == nTargetValue)
790 setCoinsRet.insert(coin.second);
791 nValueRet += coin.first;
794 else if (n < nTargetValue + CENT)
796 vValue.push_back(coin);
799 else if (n < coinLowestLarger.first)
801 coinLowestLarger = coin;
807 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
809 for (int i = 0; i < vValue.size(); ++i)
811 setCoinsRet.insert(vValue[i].second);
812 nValueRet += vValue[i].first;
817 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
819 if (coinLowestLarger.second.first == NULL)
821 setCoinsRet.insert(coinLowestLarger.second);
822 nValueRet += coinLowestLarger.first;
826 if (nTotalLower >= nTargetValue + CENT)
827 nTargetValue += CENT;
829 // Solve subset sum by stochastic approximation
830 sort(vValue.rbegin(), vValue.rend());
831 vector<char> vfIncluded;
832 vector<char> vfBest(vValue.size(), true);
833 int64 nBest = nTotalLower;
835 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
837 vfIncluded.assign(vValue.size(), false);
839 bool fReachedTarget = false;
840 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
842 for (int i = 0; i < vValue.size(); i++)
844 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
846 nTotal += vValue[i].first;
847 vfIncluded[i] = true;
848 if (nTotal >= nTargetValue)
850 fReachedTarget = true;
856 nTotal -= vValue[i].first;
857 vfIncluded[i] = false;
864 // If the next larger is still closer, return it
865 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
867 setCoinsRet.insert(coinLowestLarger.second);
868 nValueRet += coinLowestLarger.first;
871 for (int i = 0; i < vValue.size(); i++)
874 setCoinsRet.insert(vValue[i].second);
875 nValueRet += vValue[i].first;
879 printf("SelectCoins() best subset: ");
880 for (int i = 0; i < vValue.size(); i++)
882 printf("%s ", FormatMoney(vValue[i].first).c_str());
883 printf("total %s\n", FormatMoney(nBest).c_str());
889 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
891 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
892 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
893 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
899 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
902 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
908 if (vecSend.empty() || nValue < 0)
911 wtxNew.pwallet = this;
913 CRITICAL_BLOCK(cs_main)
914 CRITICAL_BLOCK(cs_wallet)
916 // txdb must be opened before the mapWallet lock
919 nFeeRet = nTransactionFee;
924 wtxNew.fFromMe = true;
926 int64 nTotalValue = nValue + nFeeRet;
927 double dPriority = 0;
928 // vouts to the payees
929 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
930 wtxNew.vout.push_back(CTxOut(s.second, s.first));
932 // Choose coins to use
933 set<pair<const CWalletTx*,unsigned int> > setCoins;
935 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
937 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
939 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
940 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
943 int64 nChange = nValueIn - nValue - nFeeRet;
944 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
945 // or until nChange becomes zero
946 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
948 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
949 nChange -= nMoveToFee;
950 nFeeRet += nMoveToFee;
955 // Note: We use a new key here to keep it from being obvious which side is the change.
956 // The drawback is that by not reusing a previous key, the change may be lost if a
957 // backup is restored, if the backup doesn't have the new private key for the change.
958 // If we reused the old key, it would be possible to add code to look for and
959 // rediscover unknown transactions that were written with keys of ours to recover
960 // post-backup change.
962 // Reserve a new key pair from key pool
963 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
964 // assert(mapKeys.count(vchPubKey));
966 // Fill a vout to ourself, using same address type as the payment
967 CScript scriptChange;
968 if (vecSend[0].first.GetBitcoinAddress().IsValid())
969 scriptChange.SetBitcoinAddress(vchPubKey);
971 scriptChange << vchPubKey << OP_CHECKSIG;
973 // Insert change txn at random position:
974 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
975 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
978 reservekey.ReturnKey();
981 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
982 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
986 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
987 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
991 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
992 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
996 // Check that enough fee is included
997 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
998 bool fAllowFree = CTransaction::AllowFree(dPriority);
999 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1000 if (nFeeRet < max(nPayFee, nMinFee))
1002 nFeeRet = max(nPayFee, nMinFee);
1006 // Fill vtxPrev by copying from previous transactions vtxPrev
1007 wtxNew.AddSupportingTransactions(txdb);
1008 wtxNew.fTimeReceivedIsTxTime = true;
1017 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1019 vector< pair<CScript, int64> > vecSend;
1020 vecSend.push_back(make_pair(scriptPubKey, nValue));
1021 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1024 // Call after CreateTransaction unless you want to abort
1025 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1027 CRITICAL_BLOCK(cs_main)
1028 CRITICAL_BLOCK(cs_wallet)
1030 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1032 // This is only to keep the database open to defeat the auto-flush for the
1033 // duration of this scope. This is the only place where this optimization
1034 // maybe makes sense; please don't do it anywhere else.
1035 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1037 // Take key pair from key pool so it won't be used again
1038 reservekey.KeepKey();
1040 // Add tx to wallet, because if it has change it's also ours,
1041 // otherwise just for transaction history.
1042 AddToWallet(wtxNew);
1044 // Mark old coins as spent
1045 set<CWalletTx*> setCoins;
1046 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1048 CWalletTx &coin = mapWallet[txin.prevout.hash];
1049 coin.pwallet = this;
1050 coin.MarkSpent(txin.prevout.n);
1052 vWalletUpdated.push_back(coin.GetHash());
1059 // Track how many getdata requests our transaction gets
1060 mapRequestCount[wtxNew.GetHash()] = 0;
1063 if (!wtxNew.AcceptToMemoryPool())
1065 // This must not fail. The transaction has already been signed and recorded.
1066 printf("CommitTransaction() : Error: Transaction not valid");
1069 wtxNew.RelayWalletTransaction();
1078 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1080 CReserveKey reservekey(this);
1085 string strError = _("Error: Wallet locked, unable to create transaction ");
1086 printf("SendMoney() : %s", strError.c_str());
1089 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1092 if (nValue + nFeeRequired > GetBalance())
1093 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());
1095 strError = _("Error: Transaction creation failed ");
1096 printf("SendMoney() : %s", strError.c_str());
1100 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1103 if (!CommitTransaction(wtxNew, reservekey))
1104 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.");
1112 string CWallet::SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1116 return _("Invalid amount");
1117 if (nValue + nTransactionFee > GetBalance())
1118 return _("Insufficient funds");
1120 // Parse bitcoin address
1121 CScript scriptPubKey;
1122 scriptPubKey.SetBitcoinAddress(address);
1124 return SendMoney(scriptPubKey, nValue, wtxNew, fAskFee);
1130 int CWallet::LoadWallet(bool& fFirstRunRet)
1134 fFirstRunRet = false;
1135 int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
1136 if (nLoadWalletRet != DB_LOAD_OK)
1137 return nLoadWalletRet;
1138 fFirstRunRet = vchDefaultKey.empty();
1140 if (!HaveKey(Hash160(vchDefaultKey)))
1142 // Create new keyUser and set as default key
1143 RandAddSeedPerfmon();
1145 SetDefaultKey(GetOrReuseKeyFromPool());
1146 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1147 return DB_LOAD_FAIL;
1150 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1155 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1157 mapAddressBook[address] = strName;
1160 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1163 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1165 mapAddressBook.erase(address);
1168 return CWalletDB(strWalletFile).EraseName(address.ToString());
1172 void CWallet::PrintWallet(const CBlock& block)
1174 CRITICAL_BLOCK(cs_wallet)
1176 if (mapWallet.count(block.vtx[0].GetHash()))
1178 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1179 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1185 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1187 CRITICAL_BLOCK(cs_wallet)
1189 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1190 if (mi != mapWallet.end())
1199 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1203 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1206 vchDefaultKey = vchPubKey;
1210 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1212 if (!pwallet->fFileBacked)
1214 strWalletFileOut = pwallet->strWalletFile;
1218 bool CWallet::TopUpKeyPool()
1220 CRITICAL_BLOCK(cs_wallet)
1225 CWalletDB walletdb(strWalletFile);
1228 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1229 while (setKeyPool.size() < nTargetSize+1)
1232 if (!setKeyPool.empty())
1233 nEnd = *(--setKeyPool.end()) + 1;
1234 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1235 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1236 setKeyPool.insert(nEnd);
1237 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1243 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1246 keypool.vchPubKey.clear();
1247 CRITICAL_BLOCK(cs_wallet)
1252 // Get the oldest key
1253 if(setKeyPool.empty())
1256 CWalletDB walletdb(strWalletFile);
1258 nIndex = *(setKeyPool.begin());
1259 setKeyPool.erase(setKeyPool.begin());
1260 if (!walletdb.ReadPool(nIndex, keypool))
1261 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1262 if (!HaveKey(Hash160(keypool.vchPubKey)))
1263 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1264 assert(!keypool.vchPubKey.empty());
1265 printf("keypool reserve %"PRI64d"\n", nIndex);
1269 void CWallet::KeepKey(int64 nIndex)
1271 // Remove from key pool
1274 CWalletDB walletdb(strWalletFile);
1275 walletdb.ErasePool(nIndex);
1277 printf("keypool keep %"PRI64d"\n", nIndex);
1280 void CWallet::ReturnKey(int64 nIndex)
1282 // Return to key pool
1283 CRITICAL_BLOCK(cs_wallet)
1284 setKeyPool.insert(nIndex);
1285 printf("keypool return %"PRI64d"\n", nIndex);
1288 vector<unsigned char> CWallet::GetOrReuseKeyFromPool()
1292 ReserveKeyFromKeyPool(nIndex, keypool);
1294 return vchDefaultKey;
1296 return keypool.vchPubKey;
1299 int64 CWallet::GetOldestKeyPoolTime()
1303 ReserveKeyFromKeyPool(nIndex, keypool);
1307 return keypool.nTime;
1310 vector<unsigned char> CReserveKey::GetReservedKey()
1315 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1317 vchPubKey = keypool.vchPubKey;
1320 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1321 vchPubKey = pwallet->vchDefaultKey;
1324 assert(!vchPubKey.empty());
1328 void CReserveKey::KeepKey()
1331 pwallet->KeepKey(nIndex);
1336 void CReserveKey::ReturnKey()
1339 pwallet->ReturnKey(nIndex);