fuzz coverage

// Copyright (c) 2009-2010 Satoshi Nakamoto

// Copyright (c) 2009-2019 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <primitives/block.h>

#include <hash.h>

#include <tinyformat.h>

uint256 CBlockHeader::GetHash() const

{

    return (HashWriter{} << *this).GetHash();

}

std::string CBlock::ToString() const

{

    std::stringstream s;

    s << strprintf("CBlock(hash=%s, ver=0x%08x, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%u)\n",

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#define strprintf tfm::format

        GetHash().ToString(),

        nVersion,

        hashPrevBlock.ToString(),

        hashMerkleRoot.ToString(),

        nTime, nBits, nNonce,

        vtx.size());

    for (const auto& tx : vtx) {

        s << "  " << tx->ToString() << "\n";

    }

    return s.str();

}