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_pwalletdbEncryption)
38 if (pwalletdbEncryption)
39 return pwalletdbEncryption->WriteCryptedKey(vchPubKey, vchCryptedSecret);
41 return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey, vchCryptedSecret);
45 bool CWallet::Unlock(const string& strWalletPassphrase)
47 CRITICAL_BLOCK(cs_vMasterKey)
53 CKeyingMaterial vMasterKey;
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))
68 bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const string& strNewWalletPassphrase)
70 CRITICAL_BLOCK(cs_vMasterKey)
72 bool fWasLocked = IsLocked();
77 CKeyingMaterial vMasterKey;
78 BOOST_FOREACH(MasterKeyMap::value_type& pMasterKey, mapMasterKeys)
80 if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
82 if(!crypter.Decrypt(pMasterKey.second.vchCryptedKey, vMasterKey))
84 if (CCryptoKeyStore::Unlock(vMasterKey))
86 int64 nStartTime = GetTimeMillis();
87 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
88 pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
90 nStartTime = GetTimeMillis();
91 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
92 pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
94 if (pMasterKey.second.nDeriveIterations < 25000)
95 pMasterKey.second.nDeriveIterations = 25000;
97 printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
99 if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
101 if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey))
103 CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
114 // This class implements an addrIncoming entry that causes pre-0.4
115 // clients to crash on startup if reading a private-key-encrypted wallet.
116 class CCorruptAddress
121 if (nType & SER_DISK)
126 bool CWallet::EncryptWallet(const string& strWalletPassphrase)
128 CRITICAL_BLOCK(cs_KeyStore)
129 CRITICAL_BLOCK(cs_vMasterKey)
130 CRITICAL_BLOCK(cs_pwalletdbEncryption)
135 CKeyingMaterial vMasterKey;
136 RandAddSeedPerfmon();
138 vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
139 RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
141 CMasterKey kMasterKey;
143 RandAddSeedPerfmon();
144 kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
145 RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
148 int64 nStartTime = GetTimeMillis();
149 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
150 kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
152 nStartTime = GetTimeMillis();
153 crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
154 kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
156 if (kMasterKey.nDeriveIterations < 25000)
157 kMasterKey.nDeriveIterations = 25000;
159 printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
161 if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
163 if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey))
166 mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
169 pwalletdbEncryption = new CWalletDB(strWalletFile);
170 pwalletdbEncryption->TxnBegin();
171 pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
174 if (!EncryptKeys(vMasterKey))
177 pwalletdbEncryption->TxnAbort();
178 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.
183 CCorruptAddress corruptAddress;
184 pwalletdbEncryption->WriteSetting("addrIncoming", corruptAddress);
185 if (!pwalletdbEncryption->TxnCommit())
186 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.
188 pwalletdbEncryption->Close();
189 pwalletdbEncryption = NULL;
197 void CWallet::WalletUpdateSpent(const CTransaction &tx)
199 // Anytime a signature is successfully verified, it's proof the outpoint is spent.
200 // Update the wallet spent flag if it doesn't know due to wallet.dat being
201 // restored from backup or the user making copies of wallet.dat.
202 CRITICAL_BLOCK(cs_mapWallet)
204 BOOST_FOREACH(const CTxIn& txin, tx.vin)
206 map<uint256, CWalletTx>::iterator mi = mapWallet.find(txin.prevout.hash);
207 if (mi != mapWallet.end())
209 CWalletTx& wtx = (*mi).second;
210 if (!wtx.IsSpent(txin.prevout.n) && IsMine(wtx.vout[txin.prevout.n]))
212 printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
213 wtx.MarkSpent(txin.prevout.n);
215 vWalletUpdated.push_back(txin.prevout.hash);
222 bool CWallet::AddToWallet(const CWalletTx& wtxIn)
224 uint256 hash = wtxIn.GetHash();
225 CRITICAL_BLOCK(cs_mapWallet)
227 // Inserts only if not already there, returns tx inserted or tx found
228 pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
229 CWalletTx& wtx = (*ret.first).second;
231 bool fInsertedNew = ret.second;
233 wtx.nTimeReceived = GetAdjustedTime();
235 bool fUpdated = false;
239 if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
241 wtx.hashBlock = wtxIn.hashBlock;
244 if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
246 wtx.vMerkleBranch = wtxIn.vMerkleBranch;
247 wtx.nIndex = wtxIn.nIndex;
250 if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
252 wtx.fFromMe = wtxIn.fFromMe;
255 fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
259 printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,10).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
262 if (fInsertedNew || fUpdated)
263 if (!wtx.WriteToDisk())
266 // If default receiving address gets used, replace it with a new one
267 CScript scriptDefaultKey;
268 scriptDefaultKey.SetBitcoinAddress(vchDefaultKey);
269 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
271 if (txout.scriptPubKey == scriptDefaultKey)
273 SetDefaultKey(GetOrReuseKeyFromPool());
274 SetAddressBookName(CBitcoinAddress(vchDefaultKey), "");
279 vWalletUpdated.push_back(hash);
281 // since AddToWallet is called directly for self-originating transactions, check for consumption of own coins
282 WalletUpdateSpent(wtx);
290 bool CWallet::AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate)
292 uint256 hash = tx.GetHash();
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);
308 bool CWallet::EraseFromWallet(uint256 hash)
312 CRITICAL_BLOCK(cs_mapWallet)
314 if (mapWallet.erase(hash))
315 CWalletDB(strWalletFile).EraseTx(hash);
321 bool CWallet::IsMine(const CTxIn &txin) const
323 CRITICAL_BLOCK(cs_mapWallet)
325 map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
326 if (mi != mapWallet.end())
328 const CWalletTx& prev = (*mi).second;
329 if (txin.prevout.n < prev.vout.size())
330 if (IsMine(prev.vout[txin.prevout.n]))
337 int64 CWallet::GetDebit(const CTxIn &txin) const
339 CRITICAL_BLOCK(cs_mapWallet)
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]))
347 return prev.vout[txin.prevout.n].nValue;
353 int64 CWalletTx::GetTxTime() const
355 if (!fTimeReceivedIsTxTime && hashBlock != 0)
357 // If we did not receive the transaction directly, we rely on the block's
358 // time to figure out when it happened. We use the median over a range
359 // of blocks to try to filter out inaccurate block times.
360 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
361 if (mi != mapBlockIndex.end())
363 CBlockIndex* pindex = (*mi).second;
365 return pindex->GetMedianTime();
368 return nTimeReceived;
371 int CWalletTx::GetRequestCount() const
373 // Returns -1 if it wasn't being tracked
375 CRITICAL_BLOCK(pwallet->cs_mapRequestCount)
382 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
383 if (mi != pwallet->mapRequestCount.end())
384 nRequests = (*mi).second;
389 // Did anyone request this transaction?
390 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
391 if (mi != pwallet->mapRequestCount.end())
393 nRequests = (*mi).second;
395 // How about the block it's in?
396 if (nRequests == 0 && hashBlock != 0)
398 map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
399 if (mi != pwallet->mapRequestCount.end())
400 nRequests = (*mi).second;
402 nRequests = 1; // If it's in someone else's block it must have got out
410 void CWalletTx::GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, list<pair<CBitcoinAddress, int64> >& listReceived,
411 list<pair<CBitcoinAddress, int64> >& listSent, int64& nFee, string& strSentAccount) const
413 nGeneratedImmature = nGeneratedMature = nFee = 0;
414 listReceived.clear();
416 strSentAccount = strFromAccount;
420 if (GetBlocksToMaturity() > 0)
421 nGeneratedImmature = pwallet->GetCredit(*this);
423 nGeneratedMature = GetCredit();
428 int64 nDebit = GetDebit();
429 if (nDebit > 0) // debit>0 means we signed/sent this transaction
431 int64 nValueOut = GetValueOut();
432 nFee = nDebit - nValueOut;
435 // Sent/received. Standard client will never generate a send-to-multiple-recipients,
436 // but non-standard clients might (so return a list of address/amount pairs)
437 BOOST_FOREACH(const CTxOut& txout, vout)
439 CBitcoinAddress address;
440 vector<unsigned char> vchPubKey;
441 if (!ExtractAddress(txout.scriptPubKey, NULL, address))
443 printf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
444 this->GetHash().ToString().c_str());
445 address = " unknown ";
448 // Don't report 'change' txouts
449 if (nDebit > 0 && pwallet->IsChange(txout))
453 listSent.push_back(make_pair(address, txout.nValue));
455 if (pwallet->IsMine(txout))
456 listReceived.push_back(make_pair(address, txout.nValue));
461 void CWalletTx::GetAccountAmounts(const string& strAccount, int64& nGenerated, int64& nReceived,
462 int64& nSent, int64& nFee) const
464 nGenerated = nReceived = nSent = nFee = 0;
466 int64 allGeneratedImmature, allGeneratedMature, allFee;
467 allGeneratedImmature = allGeneratedMature = allFee = 0;
468 string strSentAccount;
469 list<pair<CBitcoinAddress, int64> > listReceived;
470 list<pair<CBitcoinAddress, int64> > listSent;
471 GetAmounts(allGeneratedImmature, allGeneratedMature, listReceived, listSent, allFee, strSentAccount);
473 if (strAccount == "")
474 nGenerated = allGeneratedMature;
475 if (strAccount == strSentAccount)
477 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& s, listSent)
481 CRITICAL_BLOCK(pwallet->cs_mapAddressBook)
483 BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress,int64)& r, listReceived)
485 if (pwallet->mapAddressBook.count(r.first))
487 map<CBitcoinAddress, string>::const_iterator mi = pwallet->mapAddressBook.find(r.first);
488 if (mi != pwallet->mapAddressBook.end() && (*mi).second == strAccount)
489 nReceived += r.second;
491 else if (strAccount.empty())
493 nReceived += r.second;
499 void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
503 const int COPY_DEPTH = 3;
504 if (SetMerkleBranch() < COPY_DEPTH)
506 vector<uint256> vWorkQueue;
507 BOOST_FOREACH(const CTxIn& txin, vin)
508 vWorkQueue.push_back(txin.prevout.hash);
510 // This critsect is OK because txdb is already open
511 CRITICAL_BLOCK(pwallet->cs_mapWallet)
513 map<uint256, const CMerkleTx*> mapWalletPrev;
514 set<uint256> setAlreadyDone;
515 for (int i = 0; i < vWorkQueue.size(); i++)
517 uint256 hash = vWorkQueue[i];
518 if (setAlreadyDone.count(hash))
520 setAlreadyDone.insert(hash);
523 map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(hash);
524 if (mi != pwallet->mapWallet.end())
527 BOOST_FOREACH(const CMerkleTx& txWalletPrev, (*mi).second.vtxPrev)
528 mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
530 else if (mapWalletPrev.count(hash))
532 tx = *mapWalletPrev[hash];
534 else if (!fClient && txdb.ReadDiskTx(hash, tx))
540 printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
544 int nDepth = tx.SetMerkleBranch();
545 vtxPrev.push_back(tx);
547 if (nDepth < COPY_DEPTH)
548 BOOST_FOREACH(const CTxIn& txin, tx.vin)
549 vWorkQueue.push_back(txin.prevout.hash);
554 reverse(vtxPrev.begin(), vtxPrev.end());
557 bool CWalletTx::WriteToDisk()
559 return CWalletDB(pwallet->strWalletFile).WriteTx(GetHash(), *this);
562 int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
566 CBlockIndex* pindex = pindexStart;
567 CRITICAL_BLOCK(cs_mapWallet)
572 block.ReadFromDisk(pindex, true);
573 BOOST_FOREACH(CTransaction& tx, block.vtx)
575 if (AddToWalletIfInvolvingMe(tx, &block, fUpdate))
578 pindex = pindex->pnext;
584 void CWallet::ReacceptWalletTransactions()
588 while (fRepeat) CRITICAL_BLOCK(cs_mapWallet)
591 vector<CDiskTxPos> vMissingTx;
592 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
594 CWalletTx& wtx = item.second;
595 if (wtx.IsCoinBase() && wtx.IsSpent(0))
599 bool fUpdated = false;
600 if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
602 // Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
603 if (txindex.vSpent.size() != wtx.vout.size())
605 printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
608 for (int i = 0; i < txindex.vSpent.size(); i++)
612 if (!txindex.vSpent[i].IsNull() && IsMine(wtx.vout[i]))
616 vMissingTx.push_back(txindex.vSpent[i]);
621 printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
628 // Reaccept any txes of ours that aren't already in a block
629 if (!wtx.IsCoinBase())
630 wtx.AcceptWalletTransaction(txdb, false);
633 if (!vMissingTx.empty())
635 // TODO: optimize this to scan just part of the block chain?
636 if (ScanForWalletTransactions(pindexGenesisBlock))
637 fRepeat = true; // Found missing transactions: re-do Reaccept.
642 void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
644 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
646 if (!tx.IsCoinBase())
648 uint256 hash = tx.GetHash();
649 if (!txdb.ContainsTx(hash))
650 RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
655 uint256 hash = GetHash();
656 if (!txdb.ContainsTx(hash))
658 printf("Relaying wtx %s\n", hash.ToString().substr(0,10).c_str());
659 RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
664 void CWalletTx::RelayWalletTransaction()
667 RelayWalletTransaction(txdb);
670 void CWallet::ResendWalletTransactions()
672 // Do this infrequently and randomly to avoid giving away
673 // that these are our transactions.
674 static int64 nNextTime;
675 if (GetTime() < nNextTime)
677 bool fFirst = (nNextTime == 0);
678 nNextTime = GetTime() + GetRand(30 * 60);
682 // Only do it if there's been a new block since last time
683 static int64 nLastTime;
684 if (nTimeBestReceived < nLastTime)
686 nLastTime = GetTime();
688 // Rebroadcast any of our txes that aren't in a block yet
689 printf("ResendWalletTransactions()\n");
691 CRITICAL_BLOCK(cs_mapWallet)
693 // Sort them in chronological order
694 multimap<unsigned int, CWalletTx*> mapSorted;
695 BOOST_FOREACH(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
697 CWalletTx& wtx = item.second;
698 // Don't rebroadcast until it's had plenty of time that
699 // it should have gotten in already by now.
700 if (nTimeBestReceived - (int64)wtx.nTimeReceived > 5 * 60)
701 mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
703 BOOST_FOREACH(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
705 CWalletTx& wtx = *item.second;
706 wtx.RelayWalletTransaction(txdb);
716 //////////////////////////////////////////////////////////////////////////////
722 int64 CWallet::GetBalance() const
725 CRITICAL_BLOCK(cs_mapWallet)
727 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
729 const CWalletTx* pcoin = &(*it).second;
730 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
732 nTotal += pcoin->GetAvailableCredit();
739 int64 CWallet::GetUnconfirmedBalance() const
742 CRITICAL_BLOCK(cs_mapWallet)
744 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
746 const CWalletTx* pcoin = &(*it).second;
747 if (pcoin->IsFinal() && pcoin->IsConfirmed())
749 nTotal += pcoin->GetAvailableCredit();
755 bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
760 // List of values less than target
761 pair<int64, pair<const CWalletTx*,unsigned int> > coinLowestLarger;
762 coinLowestLarger.first = INT64_MAX;
763 coinLowestLarger.second.first = NULL;
764 vector<pair<int64, pair<const CWalletTx*,unsigned int> > > vValue;
765 int64 nTotalLower = 0;
767 CRITICAL_BLOCK(cs_mapWallet)
769 vector<const CWalletTx*> vCoins;
770 vCoins.reserve(mapWallet.size());
771 for (map<uint256, CWalletTx>::const_iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
772 vCoins.push_back(&(*it).second);
773 random_shuffle(vCoins.begin(), vCoins.end(), GetRandInt);
775 BOOST_FOREACH(const CWalletTx* pcoin, vCoins)
777 if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
780 if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
783 int nDepth = pcoin->GetDepthInMainChain();
784 if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
787 for (int i = 0; i < pcoin->vout.size(); i++)
789 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
792 int64 n = pcoin->vout[i].nValue;
797 pair<int64,pair<const CWalletTx*,unsigned int> > coin = make_pair(n,make_pair(pcoin,i));
799 if (n == nTargetValue)
801 setCoinsRet.insert(coin.second);
802 nValueRet += coin.first;
805 else if (n < nTargetValue + CENT)
807 vValue.push_back(coin);
810 else if (n < coinLowestLarger.first)
812 coinLowestLarger = coin;
818 if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
820 for (int i = 0; i < vValue.size(); ++i)
822 setCoinsRet.insert(vValue[i].second);
823 nValueRet += vValue[i].first;
828 if (nTotalLower < nTargetValue + (coinLowestLarger.second.first ? CENT : 0))
830 if (coinLowestLarger.second.first == NULL)
832 setCoinsRet.insert(coinLowestLarger.second);
833 nValueRet += coinLowestLarger.first;
837 if (nTotalLower >= nTargetValue + CENT)
838 nTargetValue += CENT;
840 // Solve subset sum by stochastic approximation
841 sort(vValue.rbegin(), vValue.rend());
842 vector<char> vfIncluded;
843 vector<char> vfBest(vValue.size(), true);
844 int64 nBest = nTotalLower;
846 for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
848 vfIncluded.assign(vValue.size(), false);
850 bool fReachedTarget = false;
851 for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
853 for (int i = 0; i < vValue.size(); i++)
855 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
857 nTotal += vValue[i].first;
858 vfIncluded[i] = true;
859 if (nTotal >= nTargetValue)
861 fReachedTarget = true;
867 nTotal -= vValue[i].first;
868 vfIncluded[i] = false;
875 // If the next larger is still closer, return it
876 if (coinLowestLarger.second.first && coinLowestLarger.first - nTargetValue <= nBest - nTargetValue)
878 setCoinsRet.insert(coinLowestLarger.second);
879 nValueRet += coinLowestLarger.first;
882 for (int i = 0; i < vValue.size(); i++)
885 setCoinsRet.insert(vValue[i].second);
886 nValueRet += vValue[i].first;
890 printf("SelectCoins() best subset: ");
891 for (int i = 0; i < vValue.size(); i++)
893 printf("%s ", FormatMoney(vValue[i].first).c_str());
894 printf("total %s\n", FormatMoney(nBest).c_str());
900 bool CWallet::SelectCoins(int64 nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const
902 return (SelectCoinsMinConf(nTargetValue, 1, 6, setCoinsRet, nValueRet) ||
903 SelectCoinsMinConf(nTargetValue, 1, 1, setCoinsRet, nValueRet) ||
904 SelectCoinsMinConf(nTargetValue, 0, 1, setCoinsRet, nValueRet));
910 bool CWallet::CreateTransaction(const vector<pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
913 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
919 if (vecSend.empty() || nValue < 0)
922 wtxNew.pwallet = this;
924 CRITICAL_BLOCK(cs_main)
926 // txdb must be opened before the mapWallet lock
928 CRITICAL_BLOCK(cs_mapWallet)
930 nFeeRet = nTransactionFee;
935 wtxNew.fFromMe = true;
937 int64 nTotalValue = nValue + nFeeRet;
938 double dPriority = 0;
939 // vouts to the payees
940 BOOST_FOREACH (const PAIRTYPE(CScript, int64)& s, vecSend)
941 wtxNew.vout.push_back(CTxOut(s.second, s.first));
943 // Choose coins to use
944 set<pair<const CWalletTx*,unsigned int> > setCoins;
946 if (!SelectCoins(nTotalValue, setCoins, nValueIn))
948 BOOST_FOREACH(PAIRTYPE(const CWalletTx*, unsigned int) pcoin, setCoins)
950 int64 nCredit = pcoin.first->vout[pcoin.second].nValue;
951 dPriority += (double)nCredit * pcoin.first->GetDepthInMainChain();
954 int64 nChange = nValueIn - nValue - nFeeRet;
955 // if sub-cent change is required, the fee must be raised to at least MIN_TX_FEE
956 // or until nChange becomes zero
957 if (nFeeRet < MIN_TX_FEE && nChange > 0 && nChange < CENT)
959 int64 nMoveToFee = min(nChange, MIN_TX_FEE - nFeeRet);
960 nChange -= nMoveToFee;
961 nFeeRet += nMoveToFee;
966 // Note: We use a new key here to keep it from being obvious which side is the change.
967 // The drawback is that by not reusing a previous key, the change may be lost if a
968 // backup is restored, if the backup doesn't have the new private key for the change.
969 // If we reused the old key, it would be possible to add code to look for and
970 // rediscover unknown transactions that were written with keys of ours to recover
971 // post-backup change.
973 // Reserve a new key pair from key pool
974 vector<unsigned char> vchPubKey = reservekey.GetReservedKey();
975 // assert(mapKeys.count(vchPubKey));
977 // Fill a vout to ourself, using same address type as the payment
978 CScript scriptChange;
979 if (vecSend[0].first.GetBitcoinAddress().IsValid())
980 scriptChange.SetBitcoinAddress(vchPubKey);
982 scriptChange << vchPubKey << OP_CHECKSIG;
984 // Insert change txn at random position:
985 vector<CTxOut>::iterator position = wtxNew.vout.begin()+GetRandInt(wtxNew.vout.size());
986 wtxNew.vout.insert(position, CTxOut(nChange, scriptChange));
989 reservekey.ReturnKey();
992 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
993 wtxNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second));
997 BOOST_FOREACH(const PAIRTYPE(const CWalletTx*,unsigned int)& coin, setCoins)
998 if (!SignSignature(*this, *coin.first, wtxNew, nIn++))
1002 unsigned int nBytes = ::GetSerializeSize(*(CTransaction*)&wtxNew, SER_NETWORK);
1003 if (nBytes >= MAX_BLOCK_SIZE_GEN/5)
1005 dPriority /= nBytes;
1007 // Check that enough fee is included
1008 int64 nPayFee = nTransactionFee * (1 + (int64)nBytes / 1000);
1009 bool fAllowFree = CTransaction::AllowFree(dPriority);
1010 int64 nMinFee = wtxNew.GetMinFee(1, fAllowFree);
1011 if (nFeeRet < max(nPayFee, nMinFee))
1013 nFeeRet = max(nPayFee, nMinFee);
1017 // Fill vtxPrev by copying from previous transactions vtxPrev
1018 wtxNew.AddSupportingTransactions(txdb);
1019 wtxNew.fTimeReceivedIsTxTime = true;
1028 bool CWallet::CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet)
1030 vector< pair<CScript, int64> > vecSend;
1031 vecSend.push_back(make_pair(scriptPubKey, nValue));
1032 return CreateTransaction(vecSend, wtxNew, reservekey, nFeeRet);
1035 // Call after CreateTransaction unless you want to abort
1036 bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
1038 CRITICAL_BLOCK(cs_main)
1040 printf("CommitTransaction:\n%s", wtxNew.ToString().c_str());
1041 CRITICAL_BLOCK(cs_mapWallet)
1043 // This is only to keep the database open to defeat the auto-flush for the
1044 // duration of this scope. This is the only place where this optimization
1045 // maybe makes sense; please don't do it anywhere else.
1046 CWalletDB* pwalletdb = fFileBacked ? new CWalletDB(strWalletFile,"r") : NULL;
1048 // Take key pair from key pool so it won't be used again
1049 reservekey.KeepKey();
1051 // Add tx to wallet, because if it has change it's also ours,
1052 // otherwise just for transaction history.
1053 AddToWallet(wtxNew);
1055 // Mark old coins as spent
1056 set<CWalletTx*> setCoins;
1057 BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
1059 CWalletTx &coin = mapWallet[txin.prevout.hash];
1060 coin.pwallet = this;
1061 coin.MarkSpent(txin.prevout.n);
1063 vWalletUpdated.push_back(coin.GetHash());
1070 // Track how many getdata requests our transaction gets
1071 CRITICAL_BLOCK(cs_mapRequestCount)
1072 mapRequestCount[wtxNew.GetHash()] = 0;
1075 if (!wtxNew.AcceptToMemoryPool())
1077 // This must not fail. The transaction has already been signed and recorded.
1078 printf("CommitTransaction() : Error: Transaction not valid");
1081 wtxNew.RelayWalletTransaction();
1090 // requires cs_main lock
1091 string CWallet::SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee)
1093 CReserveKey reservekey(this);
1095 CRITICAL_BLOCK(cs_vMasterKey)
1099 string strError = _("Error: Wallet locked, unable to create transaction ");
1100 printf("SendMoney() : %s", strError.c_str());
1103 if (!CreateTransaction(scriptPubKey, nValue, wtxNew, reservekey, nFeeRequired))
1106 if (nValue + nFeeRequired > GetBalance())
1107 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());
1109 strError = _("Error: Transaction creation failed ");
1110 printf("SendMoney() : %s", strError.c_str());
1115 if (fAskFee && !ThreadSafeAskFee(nFeeRequired, _("Sending..."), NULL))
1118 if (!CommitTransaction(wtxNew, reservekey))
1119 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.");
1127 // requires cs_main lock
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_LOAD_OK)
1153 return nLoadWalletRet;
1154 fFirstRunRet = vchDefaultKey.empty();
1156 if (!HaveKey(Hash160(vchDefaultKey)))
1158 // Create new keyUser and set as default key
1159 RandAddSeedPerfmon();
1161 SetDefaultKey(GetOrReuseKeyFromPool());
1162 if (!SetAddressBookName(CBitcoinAddress(vchDefaultKey), ""))
1163 return DB_LOAD_FAIL;
1166 CreateThread(ThreadFlushWalletDB, &strWalletFile);
1171 bool CWallet::SetAddressBookName(const CBitcoinAddress& address, const string& strName)
1173 mapAddressBook[address] = strName;
1176 return CWalletDB(strWalletFile).WriteName(address.ToString(), strName);
1179 bool CWallet::DelAddressBookName(const CBitcoinAddress& address)
1181 mapAddressBook.erase(address);
1184 return CWalletDB(strWalletFile).EraseName(address.ToString());
1188 void CWallet::PrintWallet(const CBlock& block)
1190 CRITICAL_BLOCK(cs_mapWallet)
1192 if (mapWallet.count(block.vtx[0].GetHash()))
1194 CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
1195 printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
1201 bool CWallet::GetTransaction(const uint256 &hashTx, CWalletTx& wtx)
1203 CRITICAL_BLOCK(cs_mapWallet)
1205 map<uint256, CWalletTx>::iterator mi = mapWallet.find(hashTx);
1206 if (mi != mapWallet.end())
1215 bool CWallet::SetDefaultKey(const std::vector<unsigned char> &vchPubKey)
1219 if (!CWalletDB(strWalletFile).WriteDefaultKey(vchPubKey))
1222 vchDefaultKey = vchPubKey;
1226 bool GetWalletFile(CWallet* pwallet, string &strWalletFileOut)
1228 if (!pwallet->fFileBacked)
1230 strWalletFileOut = pwallet->strWalletFile;
1234 bool CWallet::TopUpKeyPool()
1236 CRITICAL_BLOCK(cs_main)
1237 CRITICAL_BLOCK(cs_mapWallet)
1238 CRITICAL_BLOCK(cs_setKeyPool)
1239 CRITICAL_BLOCK(cs_vMasterKey)
1244 CWalletDB walletdb(strWalletFile);
1247 int64 nTargetSize = max(GetArg("-keypool", 100), (int64)0);
1248 while (setKeyPool.size() < nTargetSize+1)
1251 if (!setKeyPool.empty())
1252 nEnd = *(--setKeyPool.end()) + 1;
1253 if (!walletdb.WritePool(nEnd, CKeyPool(GenerateNewKey())))
1254 throw runtime_error("TopUpKeyPool() : writing generated key failed");
1255 setKeyPool.insert(nEnd);
1256 printf("keypool added key %"PRI64d", size=%d\n", nEnd, setKeyPool.size());
1262 void CWallet::ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool)
1265 keypool.vchPubKey.clear();
1266 CRITICAL_BLOCK(cs_main)
1267 CRITICAL_BLOCK(cs_mapWallet)
1268 CRITICAL_BLOCK(cs_setKeyPool)
1273 // Get the oldest key
1274 if(setKeyPool.empty())
1277 CWalletDB walletdb(strWalletFile);
1279 nIndex = *(setKeyPool.begin());
1280 setKeyPool.erase(setKeyPool.begin());
1281 if (!walletdb.ReadPool(nIndex, keypool))
1282 throw runtime_error("ReserveKeyFromKeyPool() : read failed");
1283 if (!HaveKey(Hash160(keypool.vchPubKey)))
1284 throw runtime_error("ReserveKeyFromKeyPool() : unknown key in key pool");
1285 assert(!keypool.vchPubKey.empty());
1286 printf("keypool reserve %"PRI64d"\n", nIndex);
1290 void CWallet::KeepKey(int64 nIndex)
1292 // Remove from key pool
1295 CWalletDB walletdb(strWalletFile);
1296 CRITICAL_BLOCK(cs_main)
1298 walletdb.ErasePool(nIndex);
1301 printf("keypool keep %"PRI64d"\n", nIndex);
1304 void CWallet::ReturnKey(int64 nIndex)
1306 // Return to key pool
1307 CRITICAL_BLOCK(cs_setKeyPool)
1308 setKeyPool.insert(nIndex);
1309 printf("keypool return %"PRI64d"\n", nIndex);
1312 vector<unsigned char> CWallet::GetOrReuseKeyFromPool()
1316 ReserveKeyFromKeyPool(nIndex, keypool);
1318 return vchDefaultKey;
1320 return keypool.vchPubKey;
1323 int64 CWallet::GetOldestKeyPoolTime()
1327 ReserveKeyFromKeyPool(nIndex, keypool);
1331 return keypool.nTime;
1334 vector<unsigned char> CReserveKey::GetReservedKey()
1339 pwallet->ReserveKeyFromKeyPool(nIndex, keypool);
1341 vchPubKey = keypool.vchPubKey;
1344 printf("CReserveKey::GetReservedKey(): Warning: using default key instead of a new key, top up your keypool.");
1345 vchPubKey = pwallet->vchDefaultKey;
1348 assert(!vchPubKey.empty());
1352 void CReserveKey::KeepKey()
1355 pwallet->KeepKey(nIndex);
1360 void CReserveKey::ReturnKey()
1363 pwallet->ReturnKey(nIndex);