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block.h
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block.h
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2013 The Bitcoin developers
// Copyright (c) 2015-2020 The PIVX developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_PRIMITIVES_BLOCK_H
#define BITCOIN_PRIMITIVES_BLOCK_H
#include "primitives/transaction.h"
#include "keystore.h"
#include "serialize.h"
#include "uint256.h"
/** Nodes collect new transactions into a block, hash them into a hash tree,
* and scan through nonce values to make the block's hash satisfy proof-of-work
* requirements. When they solve the proof-of-work, they broadcast the block
* to everyone and the block is added to the block chain. The first transaction
* in the block is a special one that creates a new coin owned by the creator
* of the block.
*/
class CBlockHeader
{
public:
// header
static const int32_t CURRENT_VERSION=7; //!> Version 7 removes nAccumulatorCheckpoint from serialization
int32_t nVersion;
uint256 hashPrevBlock;
uint256 hashMerkleRoot;
uint32_t nTime;
uint32_t nBits;
uint32_t nNonce;
uint256 nAccumulatorCheckpoint; // only for version 4, 5 and 6.
CBlockHeader()
{
SetNull();
}
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action) {
READWRITE(nVersion);
READWRITE(hashPrevBlock);
READWRITE(hashMerkleRoot);
READWRITE(nTime);
READWRITE(nBits);
READWRITE(nNonce);
//zerocoin active, header changes to include accumulator checksum
if(nVersion > 3 && nVersion < 7)
READWRITE(nAccumulatorCheckpoint);
}
void SetNull()
{
nVersion = CBlockHeader::CURRENT_VERSION;
hashPrevBlock.SetNull();
hashMerkleRoot.SetNull();
nTime = 0;
nBits = 0;
nNonce = 0;
nAccumulatorCheckpoint.SetNull();
}
bool IsNull() const
{
return (nBits == 0);
}
uint256 GetHash() const;
int64_t GetBlockTime() const
{
return (int64_t)nTime;
}
};
class CBlock : public CBlockHeader
{
public:
// network and disk
std::vector<CTransactionRef> vtx;
// ppcoin: block signature - signed by one of the coin base txout[N]'s owner
std::vector<unsigned char> vchBlockSig;
// memory only
mutable bool fChecked;
CBlock()
{
SetNull();
}
CBlock(const CBlockHeader &header)
{
SetNull();
*((CBlockHeader*)this) = header;
}
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action) {
READWRITE(*(CBlockHeader*)this);
READWRITE(vtx);
if(vtx.size() > 1 && vtx[1]->IsCoinStake())
READWRITE(vchBlockSig);
}
void SetNull()
{
CBlockHeader::SetNull();
vtx.clear();
fChecked = false;
vchBlockSig.clear();
}
CBlockHeader GetBlockHeader() const
{
CBlockHeader block;
block.nVersion = nVersion;
block.hashPrevBlock = hashPrevBlock;
block.hashMerkleRoot = hashMerkleRoot;
block.nTime = nTime;
block.nBits = nBits;
block.nNonce = nNonce;
if(nVersion > 3 && nVersion < 7)
block.nAccumulatorCheckpoint = nAccumulatorCheckpoint;
return block;
}
bool IsProofOfStake() const
{
return (vtx.size() > 1 && vtx[1]->IsCoinStake());
}
bool IsProofOfWork() const
{
return !IsProofOfStake();
}
std::string ToString() const;
void print() const;
};
/** Describes a place in the block chain to another node such that if the
* other node doesn't have the same branch, it can find a recent common trunk.
* The further back it is, the further before the fork it may be.
*/
struct CBlockLocator
{
std::vector<uint256> vHave;
CBlockLocator() {}
CBlockLocator(const std::vector<uint256>& vHaveIn)
{
vHave = vHaveIn;
}
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action) {
int nVersion = s.GetVersion();
if (!(s.GetType() & SER_GETHASH))
READWRITE(nVersion);
READWRITE(vHave);
}
void SetNull()
{
vHave.clear();
}
bool IsNull()
{
return vHave.empty();
}
};
#endif // BITCOIN_PRIMITIVES_BLOCK_H