Method ValidateAndStoreHeadersCommitments

src/headerssync.cpp:139–175

}

bool HeadersSyncState::ValidateAndStoreHeadersCommitments(std::span<const CBlockHeader> headers)
{
    // The caller should not give us an empty set of headers.
    Assume(headers.size() > 0);
    if (headers.size() == 0) return true;

    Assume(m_download_state == State::PRESYNC);
    if (m_download_state != State::PRESYNC) return false;

    if (headers[0].hashPrevBlock != m_last_header_received.GetHash()) {
        // Somehow our peer gave us a header that doesn't connect.
        // This might be benign -- perhaps our peer reorged away from the chain
        // they were on. Give up on this sync for now (likely we will start a
        // new sync with a new starting point).
        LogDebug(BCLog::NET, "Initial headers sync aborted with peer=%d: non-continuous headers at height=%i (presync phase)\n", m_id, m_current_height);
        return false;
    }

    // If it does connect, (minimally) validate and occasionally store
    // commitments.
    for (const auto& hdr : headers) {
        if (!ValidateAndProcessSingleHeader(hdr)) {
            return false;
        }
    }

    if (m_current_chain_work >= m_minimum_required_work) {
        m_redownloaded_headers.clear();
        m_redownload_buffer_last_height = m_chain_start.nHeight;
        m_redownload_buffer_first_prev_hash = m_chain_start.GetBlockHash();
        m_redownload_buffer_last_hash = m_chain_start.GetBlockHash();
        m_redownload_chain_work = m_chain_start.nChainWork;
        m_download_state = State::REDOWNLOAD;
        LogDebug(BCLog::NET, "Initial headers sync transition with peer=%d: reached sufficient work at height=%i, redownloading from height=%i\n", m_id, m_current_height, m_redownload_buffer_last_height);
    }
    return true;
}

bool HeadersSyncState::ValidateAndProcessSingleHeader(const CBlockHeader& current)
{