block.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 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_PRIMITIVES_BLOCK_H
#define BITCOIN_PRIMITIVES_BLOCK_H
 
#include <primitives/transaction.h>
#include <serialize.h>
#include <uint256.h>
#include <util/time.h>
 
class CBlockHeader
{
public:
    // header
    int32_t nVersion;
    uint256 hashPrevBlock;
    uint256 hashMerkleRoot;
    uint32_t nTime;
    uint32_t nBits;
    uint32_t nNonce;
 
    CBlockHeader()
    {
        SetNull();
    }
 
    SERIALIZE_METHODS(CBlockHeader, obj) { READWRITE(obj.nVersion, obj.hashPrevBlock, obj.hashMerkleRoot, obj.nTime, obj.nBits, obj.nNonce); }
 
    void SetNull()
    {
        nVersion = 0;
        hashPrevBlock.SetNull();
        hashMerkleRoot.SetNull();
        nTime = 0;
        nBits = 0;
        nNonce = 0;
    }
 
    bool IsNull() const
    {
        return (nBits == 0);
    }
 
    uint256 GetHash() const;
 
    NodeSeconds Time() const
    {
        return NodeSeconds{std::chrono::seconds{nTime}};
    }
 
    int64_t GetBlockTime() const
    {
        return (int64_t)nTime;
    }
};
 
 
class CBlock : public CBlockHeader
{
public:
    // network and disk
    std::vector<CTransactionRef> vtx;
 
    // Memory-only flags for caching expensive checks
    mutable bool fChecked;                            // CheckBlock()
    mutable bool m_checked_witness_commitment{false}; // CheckWitnessCommitment()
    mutable bool m_checked_merkle_root{false};        // CheckMerkleRoot()
 
    CBlock()
    {
        SetNull();
    }
 
    CBlock(const CBlockHeader &header)
    {
        SetNull();
        *(static_cast<CBlockHeader*>(this)) = header;
    }
 
    SERIALIZE_METHODS(CBlock, obj)
    {
        READWRITE(AsBase<CBlockHeader>(obj), obj.vtx);
    }
 
    void SetNull()
    {
        CBlockHeader::SetNull();
        vtx.clear();
        fChecked = false;
        m_checked_witness_commitment = false;
        m_checked_merkle_root = false;
    }
 
    CBlockHeader GetBlockHeader() const
    {
        CBlockHeader block;
        block.nVersion       = nVersion;
        block.hashPrevBlock  = hashPrevBlock;
        block.hashMerkleRoot = hashMerkleRoot;
        block.nTime          = nTime;
        block.nBits          = nBits;
        block.nNonce         = nNonce;
        return block;
    }
 
    std::string ToString() const;
};
 
struct CBlockLocator
{
    static constexpr int DUMMY_VERSION = 70016;
 
    std::vector<uint256> vHave;
 
    CBlockLocator() = default;
 
    explicit CBlockLocator(std::vector<uint256>&& have) : vHave(std::move(have)) {}
 
    SERIALIZE_METHODS(CBlockLocator, obj)
    {
        int nVersion = DUMMY_VERSION;
        READWRITE(nVersion);
        READWRITE(obj.vHave);
    }
 
    void SetNull()
    {
        vHave.clear();
    }
 
    bool IsNull() const
    {
        return vHave.empty();
    }
};
 
#endif // BITCOIN_PRIMITIVES_BLOCK_H