79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2016 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_UNDO_H
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#define BITCOIN_UNDO_H
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#include "compressor.h"
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#include "primitives/transaction.h"
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#include "serialize.h"
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/** Undo information for a CTxIn
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*
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* Contains the prevout's CTxOut being spent, and if this was the
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* last output of the affected transaction, its metadata as well
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* (coinbase or not, height, transaction version)
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*/
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class CTxInUndo
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{
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public:
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CTxOut txout; // the txout data before being spent
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bool fCoinBase; // if the outpoint was the last unspent: whether it belonged to a coinbase
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unsigned int nHeight; // if the outpoint was the last unspent: its height
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int nVersion; // if the outpoint was the last unspent: its version
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CTxInUndo() : txout(), fCoinBase(false), nHeight(0), nVersion(0) {}
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CTxInUndo(const CTxOut &txoutIn, bool fCoinBaseIn = false, unsigned int nHeightIn = 0, int nVersionIn = 0) : txout(txoutIn), fCoinBase(fCoinBaseIn), nHeight(nHeightIn), nVersion(nVersionIn) { }
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template<typename Stream>
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void Serialize(Stream &s) const {
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::Serialize(s, VARINT(nHeight*2+(fCoinBase ? 1 : 0)));
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if (nHeight > 0)
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::Serialize(s, VARINT(this->nVersion));
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::Serialize(s, CTxOutCompressor(REF(txout)));
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}
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template<typename Stream>
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void Unserialize(Stream &s) {
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unsigned int nCode = 0;
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::Unserialize(s, VARINT(nCode));
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nHeight = nCode / 2;
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fCoinBase = nCode & 1;
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if (nHeight > 0)
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::Unserialize(s, VARINT(this->nVersion));
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::Unserialize(s, REF(CTxOutCompressor(REF(txout))));
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}
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};
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/** Undo information for a CTransaction */
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class CTxUndo
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{
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public:
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// undo information for all txins
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std::vector<CTxInUndo> vprevout;
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ADD_SERIALIZE_METHODS;
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template <typename Stream, typename Operation>
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inline void SerializationOp(Stream& s, Operation ser_action) {
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READWRITE(vprevout);
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}
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};
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/** Undo information for a CBlock */
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class CBlockUndo
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{
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public:
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std::vector<CTxUndo> vtxundo; // for all but the coinbase
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ADD_SERIALIZE_METHODS;
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template <typename Stream, typename Operation>
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inline void SerializationOp(Stream& s, Operation ser_action) {
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READWRITE(vtxundo);
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}
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};
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#endif // BITCOIN_UNDO_H
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