Method ReportHeadersPresync

src/validation.cpp:4282–4305

}

void ChainstateManager::ReportHeadersPresync(int64_t height, int64_t timestamp)
{
    AssertLockNotHeld(GetMutex());
    {
        LOCK(GetMutex());
        // Don't report headers presync progress if we already have a post-minchainwork header chain.
        // This means we lose reporting for potentially legitimate, but unlikely, deep reorgs, but
        // prevent attackers that spam low-work headers from filling our logs.
        if (m_best_header->nChainWork >= UintToArith256(GetConsensus().nMinimumChainWork)) return;
        // Rate limit headers presync updates to 4 per second, as these are not subject to DoS
        // protection.
        auto now = MockableSteadyClock::now();
        if (now < m_last_presync_update + std::chrono::milliseconds{250}) return;
        m_last_presync_update = now;
    }
    bool initial_download = IsInitialBlockDownload();
    GetNotifications().headerTip(GetSynchronizationState(initial_download, m_blockman.m_blockfiles_indexed), height, timestamp, /*presync=*/true);
    if (initial_download) {
        int64_t blocks_left{(NodeClock::now() - NodeSeconds{std::chrono::seconds{timestamp}}) / GetConsensus().PowTargetSpacing()};
        blocks_left = std::max<int64_t>(0, blocks_left);
        const double progress{100.0 * height / (height + blocks_left)};
        LogInfo("Pre-synchronizing blockheaders, height: %d (~%.2f%%)\n", height, progress);
    }
}

/** Store block on disk. If dbp is non-nullptr, the file is known to already reside on disk */
bool ChainstateManager::AcceptBlock(const std::shared_ptr<const CBlock>& pblock, BlockValidationState& state, CBlockIndex** ppindex, bool fRequested, const FlatFilePos* dbp, bool* fNewBlock, bool min_pow_checked)