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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2013 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or
#include "leveldbwrapper.h"
#include "main.h"
#include <map>
#include <string>
#include <utility>
#include <vector>
class CCoins;
class uint256;
// -dbcache default (MiB)
static const int64_t nDefaultDbCache = 100;
// max. -dbcache in (MiB)
static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 4096 : 1024;
// min. -dbcache in (MiB)
static const int64_t nMinDbCache = 4;
/** CCoinsView backed by the LevelDB coin database (chainstate/) */
class CCoinsViewDB : public CCoinsView
CLevelDBWrapper db;
CCoinsViewDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock);
bool GetStats(CCoinsStats &stats) const;
/** Access to the block database (blocks/index/) */
class CBlockTreeDB : public CLevelDBWrapper
CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
CBlockTreeDB(const CBlockTreeDB&);
void operator=(const CBlockTreeDB&);
bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
bool WriteBlockFileInfo(int nFile, const CBlockFileInfo &fileinfo);
bool ReadLastBlockFile(int &nFile);
bool WriteLastBlockFile(int nFile);
bool WriteReindexing(bool fReindex);
bool ReadReindexing(bool &fReindex);
bool ReadTxIndex(const uint256 &txid, CDiskTxPos &pos);
bool WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> > &list);
bool WriteFlag(const std::string &name, bool fValue);
bool ReadFlag(const std::string &name, bool &fValue);
bool LoadBlockIndexGuts();