You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
3.3 KiB
111 lines
3.3 KiB
// 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 "consensus/consensus.h" |
|
#include "primitives/transaction.h" |
|
#include "serialize.h" |
|
|
|
/** Undo information for a CTxIn |
|
* |
|
* Contains the prevout's CTxOut being spent, and its metadata as well |
|
* (coinbase or not, height). The serialization contains a dummy value of |
|
* zero. This is be compatible with older versions which expect to see |
|
* the transaction version there. |
|
*/ |
|
class TxInUndoSerializer |
|
{ |
|
const Coin* txout; |
|
|
|
public: |
|
template<typename Stream> |
|
void Serialize(Stream &s) const { |
|
::Serialize(s, VARINT(txout->nHeight * 2 + (txout->fCoinBase ? 1 : 0))); |
|
if (txout->nHeight > 0) { |
|
// Required to maintain compatibility with older undo format. |
|
::Serialize(s, (unsigned char)0); |
|
} |
|
::Serialize(s, CTxOutCompressor(REF(txout->out))); |
|
} |
|
|
|
TxInUndoSerializer(const Coin* coin) : txout(coin) {} |
|
}; |
|
|
|
class TxInUndoDeserializer |
|
{ |
|
Coin* txout; |
|
|
|
public: |
|
template<typename Stream> |
|
void Unserialize(Stream &s) { |
|
unsigned int nCode = 0; |
|
::Unserialize(s, VARINT(nCode)); |
|
txout->nHeight = nCode / 2; |
|
txout->fCoinBase = nCode & 1; |
|
if (txout->nHeight > 0) { |
|
// Old versions stored the version number for the last spend of |
|
// a transaction's outputs. Non-final spends were indicated with |
|
// height = 0. |
|
int nVersionDummy; |
|
::Unserialize(s, VARINT(nVersionDummy)); |
|
} |
|
::Unserialize(s, REF(CTxOutCompressor(REF(txout->out)))); |
|
} |
|
|
|
TxInUndoDeserializer(Coin* coin) : txout(coin) {} |
|
}; |
|
|
|
static const size_t MAX_INPUTS_PER_BLOCK = MAX_BLOCK_BASE_SIZE / ::GetSerializeSize(CTxIn(), SER_NETWORK, PROTOCOL_VERSION); |
|
|
|
/** Undo information for a CTransaction */ |
|
class CTxUndo |
|
{ |
|
public: |
|
// undo information for all txins |
|
std::vector<Coin> vprevout; |
|
|
|
template <typename Stream> |
|
void Serialize(Stream& s) const { |
|
// TODO: avoid reimplementing vector serializer |
|
uint64_t count = vprevout.size(); |
|
::Serialize(s, COMPACTSIZE(REF(count))); |
|
for (const auto& prevout : vprevout) { |
|
::Serialize(s, REF(TxInUndoSerializer(&prevout))); |
|
} |
|
} |
|
|
|
template <typename Stream> |
|
void Unserialize(Stream& s) { |
|
// TODO: avoid reimplementing vector deserializer |
|
uint64_t count = 0; |
|
::Unserialize(s, COMPACTSIZE(count)); |
|
if (count > MAX_INPUTS_PER_BLOCK) { |
|
throw std::ios_base::failure("Too many input undo records"); |
|
} |
|
vprevout.resize(count); |
|
for (auto& prevout : vprevout) { |
|
::Unserialize(s, REF(TxInUndoDeserializer(&prevout))); |
|
} |
|
} |
|
}; |
|
|
|
/** Undo information for a CBlock */ |
|
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
|
|
|