txdb.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Copyright (c) 2015-2018 The PIVX developers
// Copyright (c) 2018-2020 The DAPS Project developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_TXDB_H
#define BITCOIN_TXDB_H
 
#include "dbwrapper.h"
#include "main.h"
 
#include <map>
#include <string>
#include <utility>
#include <vector>
 
class CCoins;
class uint256;
 
static const int64_t nDefaultDbCache = 100;
static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
static const int64_t nMinDbCache = 4;
 
struct CDiskTxPos : public CDiskBlockPos {
    unsigned int nTxOffset; // after header
 
    ADD_SERIALIZE_METHODS;
 
    template <typename Stream, typename Operation>
    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
    {
        READWRITE(*(CDiskBlockPos*)this);
        READWRITE(VARINT(nTxOffset));
    }
 
    CDiskTxPos(const CDiskBlockPos& blockIn, unsigned int nTxOffsetIn) : CDiskBlockPos(blockIn.nFile, blockIn.nPos), nTxOffset(nTxOffsetIn)
    {
    }
 
    CDiskTxPos()
    {
        SetNull();
    }
 
    void SetNull()
    {
        CDiskBlockPos::SetNull();
        nTxOffset = 0;
    }
};
 
class CCoinsViewDB : public CCoinsView
{
protected:
    CDBWrapper db;
 
public:
    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;
};
 
class CBlockTreeDB : public CDBWrapper
{
public:
    CBlockTreeDB(size_t nCacheSize, bool fMemory = false, bool fWipe = false);
 
private:
    CBlockTreeDB(const CBlockTreeDB&);
    void operator=(const CBlockTreeDB&);
 
public:
    bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
    bool WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo);
    bool ReadBlockFileInfo(int nFile, CBlockFileInfo& fileinfo);
    bool ReadLastBlockFile(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 WriteInt(const std::string& name, int nValue);
    bool ReadInt(const std::string& name, int& nValue);
    bool LoadBlockIndexGuts();
 
    bool ReadKeyImage(const std::string& keyImage, uint256& bh);
    bool ReadKeyImages(const std::string& keyImage, std::vector<uint256>& bhs);
 
    bool WriteKeyImage(const std::string& keyImage, const uint256& height);
};
#endif // BITCOIN_TXDB_H