Method WriteBlock

src/node/blockstorage.cpp:1148–1180

}

FlatFilePos BlockManager::WriteBlock(const CBlock& block, int nHeight)
{
    AssertLockHeld(::cs_main);
    const unsigned int block_size{static_cast<unsigned int>(GetSerializeSize(TX_WITH_WITNESS(block)))};
    FlatFilePos pos{FindNextBlockPos(block_size + STORAGE_HEADER_BYTES, nHeight, block.GetBlockTime())};
    if (pos.IsNull()) {
        LogError("FindNextBlockPos failed for %s while writing block", pos.ToString());
        return FlatFilePos();
    }
    AutoFile file{OpenBlockFile(pos, /*fReadOnly=*/false)};
    if (file.IsNull()) {
        LogError("OpenBlockFile failed for %s while writing block", pos.ToString());
        m_opts.notifications.fatalError(_("Failed to write block."));
        return FlatFilePos();
    }
    {
        BufferedWriter fileout{file};

        // Write index header
        fileout << GetParams().MessageStart() << block_size;
        pos.nPos += STORAGE_HEADER_BYTES;
        // Write block
        fileout << TX_WITH_WITNESS(block);
    }

    if (file.fclose() != 0) {
        LogError("Failed to close block file %s: %s", pos.ToString(), SysErrorString(errno));
        m_opts.notifications.fatalError(_("Failed to close file when writing block."));
        return FlatFilePos();
    }

    return pos;
}

static auto InitBlocksdirXorKey(const BlockManager::Options& opts)
{