undo.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_UNDO_H
#define BITCOIN_UNDO_H
 
#include "compressor.h" 
#include "primitives/transaction.h"
#include "serialize.h"
 
class CTxInUndo
{
public:
    CTxOut txout;         // the txout data before being spent
    bool fCoinBase;       // if the outpoint was the last unspent: whether it belonged to a coinbase
    unsigned int nHeight; // if the outpoint was the last unspent: its height
    int nVersion;         // if the outpoint was the last unspent: its version
 
    CTxInUndo() : txout(), fCoinBase(false), nHeight(0), nVersion(0) {}
    CTxInUndo(const CTxOut &txoutIn, bool fCoinBaseIn = false, unsigned int nHeightIn = 0, int nVersionIn = 0) : txout(txoutIn), fCoinBase(fCoinBaseIn), nHeight(nHeightIn), nVersion(nVersionIn) { }
 
    template<typename Stream>
    void Serialize(Stream &s) const {
        ::Serialize(s, VARINT(nHeight*2+(fCoinBase ? 1 : 0)));
        if (nHeight > 0)
            ::Serialize(s, VARINT(this->nVersion));
        ::Serialize(s, CTxOutCompressor(REF(txout)));
    }
 
    template<typename Stream>
    void Unserialize(Stream &s) {
        unsigned int nCode = 0;
        ::Unserialize(s, VARINT(nCode));
        nHeight = nCode / 2;
        fCoinBase = nCode & 1;
        if (nHeight > 0)
            ::Unserialize(s, VARINT(this->nVersion));
        ::Unserialize(s, REF(CTxOutCompressor(REF(txout))));
    }
};
 
class CTxUndo
{
public:
    // undo information for all txins
    std::vector<CTxInUndo> vprevout;
 
    ADD_SERIALIZE_METHODS;
 
    template <typename Stream, typename Operation>
    inline void SerializationOp(Stream& s, Operation ser_action) {
        READWRITE(vprevout);
    }
};
 
class CBlockUndo
{
public:
    std::vector<CTxUndo> vtxundo; // for all but the coinbase
 
    ADD_SERIALIZE_METHODS;
 
    template <typename Stream, typename Operation>
    inline void SerializationOp(Stream& s, Operation ser_action) {
        READWRITE(vtxundo);
    }
};
 
#endif // BITCOIN_UNDO_H