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https://github.com/bitcoin/bitcoin.git
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405 lines
10 KiB
C++
405 lines
10 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Distributed under the MIT/X11 software license, see the accompanying
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// file license.txt or http://www.opensource.org/licenses/mit-license.php.
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class CTransaction;
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class CTxIndex;
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class CDiskBlockIndex;
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class CDiskTxPos;
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class COutPoint;
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class CUser;
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class CReview;
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class CAddress;
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class CWalletTx;
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extern map<string, string> mapAddressBook;
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extern CCriticalSection cs_mapAddressBook;
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extern vector<unsigned char> vchDefaultKey;
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extern bool fClient;
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extern int nBestHeight;
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extern unsigned int nWalletDBUpdated;
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extern DbEnv dbenv;
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extern void DBFlush(bool fShutdown);
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class CDB
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{
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protected:
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Db* pdb;
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string strFile;
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vector<DbTxn*> vTxn;
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bool fReadOnly;
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explicit CDB(const char* pszFile, const char* pszMode="r+");
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~CDB() { Close(); }
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public:
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void Close();
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private:
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CDB(const CDB&);
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void operator=(const CDB&);
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protected:
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template<typename K, typename T>
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bool Read(const K& key, T& value)
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{
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if (!pdb)
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return false;
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// Key
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CDataStream ssKey(SER_DISK);
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ssKey.reserve(1000);
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ssKey << key;
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Dbt datKey(&ssKey[0], ssKey.size());
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// Read
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Dbt datValue;
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datValue.set_flags(DB_DBT_MALLOC);
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int ret = pdb->get(GetTxn(), &datKey, &datValue, 0);
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memset(datKey.get_data(), 0, datKey.get_size());
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if (datValue.get_data() == NULL)
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return false;
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// Unserialize value
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CDataStream ssValue((char*)datValue.get_data(), (char*)datValue.get_data() + datValue.get_size(), SER_DISK);
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ssValue >> value;
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// Clear and free memory
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memset(datValue.get_data(), 0, datValue.get_size());
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free(datValue.get_data());
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return (ret == 0);
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}
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template<typename K, typename T>
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bool Write(const K& key, const T& value, bool fOverwrite=true)
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{
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if (!pdb)
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return false;
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if (fReadOnly)
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assert(("Write called on database in read-only mode", false));
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// Key
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CDataStream ssKey(SER_DISK);
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ssKey.reserve(1000);
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ssKey << key;
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Dbt datKey(&ssKey[0], ssKey.size());
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// Value
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CDataStream ssValue(SER_DISK);
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ssValue.reserve(10000);
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ssValue << value;
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Dbt datValue(&ssValue[0], ssValue.size());
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// Write
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int ret = pdb->put(GetTxn(), &datKey, &datValue, (fOverwrite ? 0 : DB_NOOVERWRITE));
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// Clear memory in case it was a private key
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memset(datKey.get_data(), 0, datKey.get_size());
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memset(datValue.get_data(), 0, datValue.get_size());
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return (ret == 0);
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}
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template<typename K>
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bool Erase(const K& key)
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{
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if (!pdb)
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return false;
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if (fReadOnly)
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assert(("Erase called on database in read-only mode", false));
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// Key
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CDataStream ssKey(SER_DISK);
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ssKey.reserve(1000);
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ssKey << key;
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Dbt datKey(&ssKey[0], ssKey.size());
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// Erase
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int ret = pdb->del(GetTxn(), &datKey, 0);
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// Clear memory
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memset(datKey.get_data(), 0, datKey.get_size());
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return (ret == 0 || ret == DB_NOTFOUND);
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}
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template<typename K>
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bool Exists(const K& key)
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{
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if (!pdb)
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return false;
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// Key
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CDataStream ssKey(SER_DISK);
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ssKey.reserve(1000);
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ssKey << key;
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Dbt datKey(&ssKey[0], ssKey.size());
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// Exists
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int ret = pdb->exists(GetTxn(), &datKey, 0);
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// Clear memory
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memset(datKey.get_data(), 0, datKey.get_size());
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return (ret == 0);
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}
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Dbc* GetCursor()
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{
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if (!pdb)
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return NULL;
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Dbc* pcursor = NULL;
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int ret = pdb->cursor(NULL, &pcursor, 0);
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if (ret != 0)
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return NULL;
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return pcursor;
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}
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int ReadAtCursor(Dbc* pcursor, CDataStream& ssKey, CDataStream& ssValue, unsigned int fFlags=DB_NEXT)
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{
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// Read at cursor
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Dbt datKey;
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if (fFlags == DB_SET || fFlags == DB_SET_RANGE || fFlags == DB_GET_BOTH || fFlags == DB_GET_BOTH_RANGE)
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{
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datKey.set_data(&ssKey[0]);
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datKey.set_size(ssKey.size());
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}
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Dbt datValue;
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if (fFlags == DB_GET_BOTH || fFlags == DB_GET_BOTH_RANGE)
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{
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datValue.set_data(&ssValue[0]);
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datValue.set_size(ssValue.size());
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}
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datKey.set_flags(DB_DBT_MALLOC);
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datValue.set_flags(DB_DBT_MALLOC);
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int ret = pcursor->get(&datKey, &datValue, fFlags);
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if (ret != 0)
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return ret;
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else if (datKey.get_data() == NULL || datValue.get_data() == NULL)
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return 99999;
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// Convert to streams
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ssKey.SetType(SER_DISK);
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ssKey.clear();
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ssKey.write((char*)datKey.get_data(), datKey.get_size());
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ssValue.SetType(SER_DISK);
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ssValue.clear();
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ssValue.write((char*)datValue.get_data(), datValue.get_size());
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// Clear and free memory
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memset(datKey.get_data(), 0, datKey.get_size());
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memset(datValue.get_data(), 0, datValue.get_size());
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free(datKey.get_data());
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free(datValue.get_data());
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return 0;
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}
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DbTxn* GetTxn()
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{
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if (!vTxn.empty())
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return vTxn.back();
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else
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return NULL;
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}
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public:
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bool TxnBegin()
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{
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if (!pdb)
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return false;
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DbTxn* ptxn = NULL;
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int ret = dbenv.txn_begin(GetTxn(), &ptxn, DB_TXN_NOSYNC);
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if (!ptxn || ret != 0)
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return false;
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vTxn.push_back(ptxn);
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return true;
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}
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bool TxnCommit()
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{
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if (!pdb)
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return false;
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if (vTxn.empty())
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return false;
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int ret = vTxn.back()->commit(0);
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vTxn.pop_back();
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return (ret == 0);
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}
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bool TxnAbort()
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{
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if (!pdb)
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return false;
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if (vTxn.empty())
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return false;
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int ret = vTxn.back()->abort();
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vTxn.pop_back();
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return (ret == 0);
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}
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bool ReadVersion(int& nVersion)
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{
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nVersion = 0;
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return Read(string("version"), nVersion);
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}
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bool WriteVersion(int nVersion)
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{
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return Write(string("version"), nVersion);
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}
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};
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class CTxDB : public CDB
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{
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public:
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CTxDB(const char* pszMode="r+") : CDB(!fClient ? "blkindex.dat" : NULL, pszMode) { }
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private:
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CTxDB(const CTxDB&);
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void operator=(const CTxDB&);
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public:
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bool ReadTxIndex(uint256 hash, CTxIndex& txindex);
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bool UpdateTxIndex(uint256 hash, const CTxIndex& txindex);
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bool AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight);
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bool EraseTxIndex(const CTransaction& tx);
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bool ContainsTx(uint256 hash);
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bool ReadOwnerTxes(uint160 hash160, int nHeight, vector<CTransaction>& vtx);
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bool ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex);
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bool ReadDiskTx(uint256 hash, CTransaction& tx);
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bool ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex);
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bool ReadDiskTx(COutPoint outpoint, CTransaction& tx);
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bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
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bool EraseBlockIndex(uint256 hash);
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bool ReadHashBestChain(uint256& hashBestChain);
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bool WriteHashBestChain(uint256 hashBestChain);
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bool LoadBlockIndex();
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};
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class CAddrDB : public CDB
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{
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public:
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CAddrDB(const char* pszMode="r+") : CDB("addr.dat", pszMode) { }
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private:
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CAddrDB(const CAddrDB&);
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void operator=(const CAddrDB&);
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public:
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bool WriteAddress(const CAddress& addr);
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bool LoadAddresses();
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};
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bool LoadAddresses();
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class CWalletDB : public CDB
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{
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public:
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CWalletDB(const char* pszMode="r+") : CDB("wallet.dat", pszMode) { }
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private:
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CWalletDB(const CWalletDB&);
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void operator=(const CWalletDB&);
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public:
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bool ReadName(const string& strAddress, string& strName)
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{
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strName = "";
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return Read(make_pair(string("name"), strAddress), strName);
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}
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bool WriteName(const string& strAddress, const string& strName)
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{
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CRITICAL_BLOCK(cs_mapAddressBook)
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mapAddressBook[strAddress] = strName;
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nWalletDBUpdated++;
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return Write(make_pair(string("name"), strAddress), strName);
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}
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bool EraseName(const string& strAddress)
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{
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// This should only be used for sending addresses, never for receiving addresses,
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// receiving addresses must always have an address book entry if they're not change return.
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CRITICAL_BLOCK(cs_mapAddressBook)
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mapAddressBook.erase(strAddress);
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nWalletDBUpdated++;
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return Erase(make_pair(string("name"), strAddress));
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}
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bool ReadTx(uint256 hash, CWalletTx& wtx)
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{
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return Read(make_pair(string("tx"), hash), wtx);
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}
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bool WriteTx(uint256 hash, const CWalletTx& wtx)
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{
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nWalletDBUpdated++;
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return Write(make_pair(string("tx"), hash), wtx);
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}
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bool EraseTx(uint256 hash)
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{
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nWalletDBUpdated++;
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return Erase(make_pair(string("tx"), hash));
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}
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bool ReadKey(const vector<unsigned char>& vchPubKey, CPrivKey& vchPrivKey)
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{
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vchPrivKey.clear();
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return Read(make_pair(string("key"), vchPubKey), vchPrivKey);
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}
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bool WriteKey(const vector<unsigned char>& vchPubKey, const CPrivKey& vchPrivKey)
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{
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nWalletDBUpdated++;
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return Write(make_pair(string("key"), vchPubKey), vchPrivKey, false);
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}
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bool ReadDefaultKey(vector<unsigned char>& vchPubKey)
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{
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vchPubKey.clear();
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return Read(string("defaultkey"), vchPubKey);
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}
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bool WriteDefaultKey(const vector<unsigned char>& vchPubKey)
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{
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vchDefaultKey = vchPubKey;
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nWalletDBUpdated++;
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return Write(string("defaultkey"), vchPubKey);
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}
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template<typename T>
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bool ReadSetting(const string& strKey, T& value)
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{
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return Read(make_pair(string("setting"), strKey), value);
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}
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template<typename T>
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bool WriteSetting(const string& strKey, const T& value)
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{
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nWalletDBUpdated++;
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return Write(make_pair(string("setting"), strKey), value);
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}
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bool LoadWallet();
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};
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bool LoadWallet(bool& fFirstRunRet);
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inline bool SetAddressBookName(const string& strAddress, const string& strName)
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{
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return CWalletDB().WriteName(strAddress, strName);
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}
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