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/*
Copyright (C) 2019-Present SKALE Labs
This file is part of sgxwallet.
sgxwallet is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
sgxwallet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with sgxwallet. If not, see <https://www.gnu.org/licenses/>.
@file LevelDB.h
@author Stan Kladko
@date 2019
*/
#ifndef SGXWALLET_LEVELDB_H
#define SGXWALLET_LEVELDB_H
#include <memory>
#include <string>
#include <mutex>
#include <vector>
#include "common.h"
namespace leveldb {
class DB;
class Status;
class Slice;
}
class LevelDB {
recursive_mutex mutex;
shared_ptr<leveldb::DB> db;
static bool isInited;
static shared_ptr<LevelDB> levelDb;
static shared_ptr<LevelDB> csrDb;
static shared_ptr<LevelDB> csrStatusDb;
static string sgx_data_folder;
public:
static void initDataFolderAndDBs();
static const shared_ptr<LevelDB> &getLevelDb();
static const shared_ptr<LevelDB> &getCsrDb();
static const shared_ptr<LevelDB> &getCsrStatusDb();
public:
shared_ptr<string> readString(const string& _key);
void writeString(const string &key1, const string &value1);
void writeDataUnique(const string & Name, const string &value);
void writeByteArray(const char *_key, size_t _keyLen, const char *value,
size_t _valueLen);
void writeByteArray(string& _key, const char *value,
size_t _valueLen);
void deleteDHDKGKey (const string &_key);
void deleteTempNEK (const string &_key);
void deleteKey(const string &_key);
public:
void throwExceptionOnError(leveldb::Status result);
LevelDB(string& filename);
class KeyVisitor {
public:
virtual void visitDBKey(const char* _data) = 0;
virtual void writeDBKeysToVector(const char* _data, vector<const char*> & keys_vect) {}
};
uint64_t visitKeys(KeyVisitor* _visitor, uint64_t _maxKeysToVisit);
vector<string> writeKeysToVector1(uint64_t _maxKeysToVisit);
virtual ~LevelDB();
static const string &getSgxDataFolder();
};
#endif