1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2011 The Bitcoin developers
3 // Copyright (c) 2011-2012 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.
6 #ifndef BITCOIN_WALLET_H
7 #define BITCOIN_WALLET_H
13 extern bool fWalletUnlockStakeOnly;
19 // A CWallet is an extension of a keystore, which also maintains a set of
20 // transactions and balances, and provides the ability to create new
22 class CWallet : public CCryptoKeyStore
25 bool SelectCoinsMinConf(int64 nTargetValue, unsigned int nSpendTime, int nConfMine, int nConfTheirs, std::set<std::pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const;
26 bool SelectCoins(int64 nTargetValue, unsigned int nSpendTime, std::set<std::pair<const CWalletTx*,unsigned int> >& setCoinsRet, int64& nValueRet) const;
28 CWalletDB *pwalletdbEncryption;
31 mutable CCriticalSection cs_wallet;
34 std::string strWalletFile;
36 std::set<int64> setKeyPool;
38 typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
39 MasterKeyMap mapMasterKeys;
40 unsigned int nMasterKeyMaxID;
46 pwalletdbEncryption = NULL;
48 CWallet(std::string strWalletFileIn)
50 strWalletFile = strWalletFileIn;
53 pwalletdbEncryption = NULL;
56 std::map<uint256, CWalletTx> mapWallet;
57 std::vector<uint256> vWalletUpdated;
59 std::map<uint256, int> mapRequestCount;
61 std::map<CBitcoinAddress, std::string> mapAddressBook;
63 std::vector<unsigned char> vchDefaultKey;
65 // keystore implementation
66 // Adds a key to the store, and saves it to disk.
67 bool AddKey(const CKey& key);
68 // Adds a key to the store, without saving it to disk (used by LoadWallet)
69 bool LoadKey(const CKey& key) { return CCryptoKeyStore::AddKey(key); }
71 // Adds an encrypted key to the store, and saves it to disk.
72 bool AddCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
73 // Adds an encrypted key to the store, without saving it to disk (used by LoadWallet)
74 bool LoadCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret) { return CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret); }
76 bool Unlock(const SecureString& strWalletPassphrase);
77 bool ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase);
78 bool EncryptWallet(const SecureString& strWalletPassphrase);
80 bool AddToWallet(const CWalletTx& wtxIn);
81 bool AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate = false);
82 bool EraseFromWallet(uint256 hash);
83 void WalletUpdateSpent(const CTransaction& prevout);
84 int ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate = false);
85 void ReacceptWalletTransactions();
86 void ResendWalletTransactions();
87 int64 GetBalance() const;
88 int64 GetUnconfirmedBalance() const;
89 int64 GetStake() const;
90 bool CreateTransaction(const std::vector<std::pair<CScript, int64> >& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet);
91 bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CReserveKey& reservekey, int64& nFeeRet);
92 bool CreateCoinStake(CScript scriptPubKey, CTransaction& txNew);
93 bool CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey);
94 bool BroadcastTransaction(CWalletTx& wtxNew);
95 std::string SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);
96 std::string SendMoneyToBitcoinAddress(const CBitcoinAddress& address, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);
100 void ReserveKeyFromKeyPool(int64& nIndex, CKeyPool& keypool);
101 void KeepKey(int64 nIndex);
102 void ReturnKey(int64 nIndex);
103 bool GetKeyFromPool(std::vector<unsigned char> &key, bool fAllowReuse=true);
104 int64 GetOldestKeyPoolTime();
106 bool IsMine(const CTxIn& txin) const;
107 int64 GetDebit(const CTxIn& txin) const;
108 bool IsMine(const CTxOut& txout) const
110 return ::IsMine(*this, txout.scriptPubKey);
112 int64 GetCredit(const CTxOut& txout) const
114 if (!MoneyRange(txout.nValue))
115 throw std::runtime_error("CWallet::GetCredit() : value out of range");
116 return (IsMine(txout) ? txout.nValue : 0);
118 bool IsChange(const CTxOut& txout) const
120 CBitcoinAddress address;
121 if (ExtractAddress(txout.scriptPubKey, this, address))
122 CRITICAL_BLOCK(cs_wallet)
123 if (!mapAddressBook.count(address))
127 int64 GetChange(const CTxOut& txout) const
129 if (!MoneyRange(txout.nValue))
130 throw std::runtime_error("CWallet::GetChange() : value out of range");
131 return (IsChange(txout) ? txout.nValue : 0);
133 bool IsMine(const CTransaction& tx) const
135 BOOST_FOREACH(const CTxOut& txout, tx.vout)
140 bool IsFromMe(const CTransaction& tx) const
142 return (GetDebit(tx) > 0);
144 int64 GetDebit(const CTransaction& tx) const
147 BOOST_FOREACH(const CTxIn& txin, tx.vin)
149 nDebit += GetDebit(txin);
150 if (!MoneyRange(nDebit))
151 throw std::runtime_error("CWallet::GetDebit() : value out of range");
155 int64 GetCredit(const CTransaction& tx) const
158 BOOST_FOREACH(const CTxOut& txout, tx.vout)
160 nCredit += GetCredit(txout);
161 if (!MoneyRange(nCredit))
162 throw std::runtime_error("CWallet::GetCredit() : value out of range");
166 int64 GetChange(const CTransaction& tx) const
169 BOOST_FOREACH(const CTxOut& txout, tx.vout)
171 nChange += GetChange(txout);
172 if (!MoneyRange(nChange))
173 throw std::runtime_error("CWallet::GetChange() : value out of range");
177 void SetBestChain(const CBlockLocator& loc)
179 CWalletDB walletdb(strWalletFile);
180 walletdb.WriteBestBlock(loc);
183 int LoadWallet(bool& fFirstRunRet);
184 // bool BackupWallet(const std::string& strDest);
186 bool SetAddressBookName(const CBitcoinAddress& address, const std::string& strName);
188 bool DelAddressBookName(const CBitcoinAddress& address);
190 void UpdatedTransaction(const uint256 &hashTx)
192 CRITICAL_BLOCK(cs_wallet)
193 vWalletUpdated.push_back(hashTx);
196 void PrintWallet(const CBlock& block);
198 void Inventory(const uint256 &hash)
200 CRITICAL_BLOCK(cs_wallet)
202 std::map<uint256, int>::iterator mi = mapRequestCount.find(hash);
203 if (mi != mapRequestCount.end())
210 return setKeyPool.size();
213 bool GetTransaction(const uint256 &hashTx, CWalletTx& wtx);
215 bool SetDefaultKey(const std::vector<unsigned char> &vchPubKey);
224 std::vector<unsigned char> vchPubKey;
226 CReserveKey(CWallet* pwalletIn)
239 std::vector<unsigned char> GetReservedKey();
245 // A transaction with a bunch of additional info that only the owner cares
246 // about. It includes any unrecorded transactions needed to link it back
247 // to the block chain.
249 class CWalletTx : public CMerkleTx
252 const CWallet* pwallet;
254 std::vector<CMerkleTx> vtxPrev;
255 std::map<std::string, std::string> mapValue;
256 std::vector<std::pair<std::string, std::string> > vOrderForm;
257 unsigned int fTimeReceivedIsTxTime;
258 unsigned int nTimeReceived; // time received by this node
260 std::string strFromAccount;
261 std::vector<char> vfSpent; // which outputs are already spent
264 mutable char fDebitCached;
265 mutable char fCreditCached;
266 mutable char fAvailableCreditCached;
267 mutable char fChangeCached;
268 mutable int64 nDebitCached;
269 mutable int64 nCreditCached;
270 mutable int64 nAvailableCreditCached;
271 mutable int64 nChangeCached;
273 // memory only UI hints
274 mutable unsigned int nTimeDisplayed;
275 mutable int nLinesDisplayed;
276 mutable char fConfirmedDisplayed;
283 CWalletTx(const CWallet* pwalletIn)
288 CWalletTx(const CWallet* pwalletIn, const CMerkleTx& txIn) : CMerkleTx(txIn)
293 CWalletTx(const CWallet* pwalletIn, const CTransaction& txIn) : CMerkleTx(txIn)
298 void Init(const CWallet* pwalletIn)
304 fTimeReceivedIsTxTime = false;
307 strFromAccount.clear();
309 fDebitCached = false;
310 fCreditCached = false;
311 fAvailableCreditCached = false;
312 fChangeCached = false;
315 nAvailableCreditCached = 0;
319 fConfirmedDisplayed = false;
324 CWalletTx* pthis = const_cast<CWalletTx*>(this);
331 pthis->mapValue["fromaccount"] = pthis->strFromAccount;
334 BOOST_FOREACH(char f, vfSpent)
336 str += (f ? '1' : '0');
340 pthis->mapValue["spent"] = str;
343 nSerSize += SerReadWrite(s, *(CMerkleTx*)this, nType, nVersion,ser_action);
346 READWRITE(vOrderForm);
347 READWRITE(fTimeReceivedIsTxTime);
348 READWRITE(nTimeReceived);
354 pthis->strFromAccount = pthis->mapValue["fromaccount"];
356 if (mapValue.count("spent"))
357 BOOST_FOREACH(char c, pthis->mapValue["spent"])
358 pthis->vfSpent.push_back(c != '0');
360 pthis->vfSpent.assign(vout.size(), fSpent);
363 pthis->mapValue.erase("fromaccount");
364 pthis->mapValue.erase("version");
365 pthis->mapValue.erase("spent");
368 // marks certain txout's as spent
369 // returns true if any update took place
370 bool UpdateSpent(const std::vector<char>& vfNewSpent)
372 bool fReturn = false;
373 for (int i=0; i < vfNewSpent.size(); i++)
375 if (i == vfSpent.size())
378 if (vfNewSpent[i] && !vfSpent[i])
382 fAvailableCreditCached = false;
388 // make sure balances are recalculated
391 fCreditCached = false;
392 fAvailableCreditCached = false;
393 fDebitCached = false;
394 fChangeCached = false;
397 void MarkSpent(unsigned int nOut)
399 if (nOut >= vout.size())
400 throw std::runtime_error("CWalletTx::MarkSpent() : nOut out of range");
401 vfSpent.resize(vout.size());
404 vfSpent[nOut] = true;
405 fAvailableCreditCached = false;
409 bool IsSpent(unsigned int nOut) const
411 if (nOut >= vout.size())
412 throw std::runtime_error("CWalletTx::IsSpent() : nOut out of range");
413 if (nOut >= vfSpent.size())
415 return (!!vfSpent[nOut]);
418 int64 GetDebit() const
424 nDebitCached = pwallet->GetDebit(*this);
429 int64 GetCredit(bool fUseCache=true) const
431 // Must wait until coinbase is safely deep enough in the chain before valuing it
432 if ((IsCoinBase() || IsCoinStake()) && GetBlocksToMaturity() > 0)
435 // GetBalance can assume transactions in mapWallet won't change
436 if (fUseCache && fCreditCached)
437 return nCreditCached;
438 nCreditCached = pwallet->GetCredit(*this);
439 fCreditCached = true;
440 return nCreditCached;
443 int64 GetAvailableCredit(bool fUseCache=true) const
445 // Must wait until coinbase is safely deep enough in the chain before valuing it
446 if ((IsCoinBase() || IsCoinStake()) && GetBlocksToMaturity() > 0)
449 if (fUseCache && fAvailableCreditCached)
450 return nAvailableCreditCached;
453 for (int i = 0; i < vout.size(); i++)
457 const CTxOut &txout = vout[i];
458 nCredit += pwallet->GetCredit(txout);
459 if (!MoneyRange(nCredit))
460 throw std::runtime_error("CWalletTx::GetAvailableCredit() : value out of range");
464 nAvailableCreditCached = nCredit;
465 fAvailableCreditCached = true;
470 int64 GetChange() const
473 return nChangeCached;
474 nChangeCached = pwallet->GetChange(*this);
475 fChangeCached = true;
476 return nChangeCached;
479 void GetAmounts(int64& nGeneratedImmature, int64& nGeneratedMature, std::list<std::pair<CBitcoinAddress, int64> >& listReceived,
480 std::list<std::pair<CBitcoinAddress, int64> >& listSent, int64& nFee, std::string& strSentAccount) const;
482 void GetAccountAmounts(const std::string& strAccount, int64& nGenerated, int64& nReceived,
483 int64& nSent, int64& nFee) const;
485 bool IsFromMe() const
487 return (GetDebit() > 0);
490 bool IsConfirmed() const
492 // Quick answer in most cases
495 if (GetDepthInMainChain() >= 1)
497 if (!IsFromMe()) // using wtx's cached debit
500 // If no confirmations but it's from us, we can still
501 // consider it confirmed if all dependencies are confirmed
502 std::map<uint256, const CMerkleTx*> mapPrev;
503 std::vector<const CMerkleTx*> vWorkQueue;
504 vWorkQueue.reserve(vtxPrev.size()+1);
505 vWorkQueue.push_back(this);
506 for (int i = 0; i < vWorkQueue.size(); i++)
508 const CMerkleTx* ptx = vWorkQueue[i];
512 if (ptx->GetDepthInMainChain() >= 1)
514 if (!pwallet->IsFromMe(*ptx))
518 BOOST_FOREACH(const CMerkleTx& tx, vtxPrev)
519 mapPrev[tx.GetHash()] = &tx;
521 BOOST_FOREACH(const CTxIn& txin, ptx->vin)
523 if (!mapPrev.count(txin.prevout.hash))
525 vWorkQueue.push_back(mapPrev[txin.prevout.hash]);
533 int64 GetTxTime() const;
534 int GetRequestCount() const;
536 void AddSupportingTransactions(CTxDB& txdb);
538 bool AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs=true);
539 bool AcceptWalletTransaction();
541 void RelayWalletTransaction(CTxDB& txdb);
542 void RelayWalletTransaction();
547 // Private key that includes an expiration date in case it never gets used.
555 std::string strComment;
556 //// todo: add something to note what created it (user, getnewaddress, change)
557 //// maybe should have a map<string, string> property map
559 CWalletKey(int64 nExpires=0)
561 nTimeCreated = (nExpires ? GetTime() : 0);
562 nTimeExpires = nExpires;
567 if (!(nType & SER_GETHASH))
569 READWRITE(vchPrivKey);
570 READWRITE(nTimeCreated);
571 READWRITE(nTimeExpires);
572 READWRITE(strComment);
582 // Account information.
583 // Stored in wallet with key "acc"+string account name
588 std::vector<unsigned char> vchPubKey;
602 if (!(nType & SER_GETHASH))
604 READWRITE(vchPubKey);
611 // Internal transfers.
612 // Database key is acentry<account><counter>
614 class CAccountingEntry
617 std::string strAccount;
620 std::string strOtherAccount;
621 std::string strComment;
633 strOtherAccount.clear();
639 if (!(nType & SER_GETHASH))
641 // Note: strAccount is serialized as part of the key, not here.
642 READWRITE(nCreditDebit);
644 READWRITE(strOtherAccount);
645 READWRITE(strComment);
649 bool GetWalletFile(CWallet* pwallet, std::string &strWalletFileOut);