// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TXDB_LEVELDB_H
#define BITCOIN_TXDB_LEVELDB_H

#include "main.h"
#include "leveldb.h"

/** CCoinsView backed by the LevelDB coin database (coins/) */
class CCoinsViewDB : public CCoinsView
{
protected:
    CLevelDB db;
public:
    CCoinsViewDB(bool fMemory = false);

    bool GetCoins(uint256 txid, CCoins &coins);
    bool SetCoins(uint256 txid, const CCoins &coins);
    bool HaveCoins(uint256 txid);
    CBlockIndex *GetBestBlock();
    bool SetBestBlock(CBlockIndex *pindex);
    bool BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex);
    bool GetStats(CCoinsStats &stats);
};

/** Access to the block database (blktree/) */
class CBlockTreeDB : public CLevelDB
{
public:
    CBlockTreeDB(bool fMemory = false);
private:
    CBlockTreeDB(const CBlockTreeDB&);
    void operator=(const CBlockTreeDB&);
public:
    bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
    bool ReadBestInvalidTrust(CBigNum& bnBestInvalidTrust);
    bool WriteBestInvalidTrust(CBigNum bnBestInvalidTrust);
    bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
    bool WriteBlockFileInfo(int nFile, const CBlockFileInfo &fileinfo);
    bool ReadLastBlockFile(int &nFile);
    bool WriteLastBlockFile(int nFile);
    bool ReadSyncCheckpoint(uint256& hashCheckpoint);
    bool WriteSyncCheckpoint(uint256 hashCheckpoint);
    bool ReadCheckpointPubKey(std::string& strPubKey);
    bool WriteCheckpointPubKey(const std::string& strPubKey);
    bool ReadModifierUpgradeTime(unsigned int& nUpgradeTime);
    bool WriteModifierUpgradeTime(const unsigned int& nUpgradeTime);
    bool LoadBlockIndexGuts();
};

#endif // BITCOIN_TXDB_LEVELDB_H