Method LookupFilterHeader

src/index/blockfilterindex.cpp:387–415

}

bool BlockFilterIndex::LookupFilterHeader(const CBlockIndex* block_index, uint256& header_out)
{
    LOCK(m_cs_headers_cache);

    bool is_checkpoint{block_index->nHeight % CFCHECKPT_INTERVAL == 0};

    if (is_checkpoint) {
        // Try to find the block in the headers cache if this is a checkpoint height.
        auto header = m_headers_cache.find(block_index->GetBlockHash());
        if (header != m_headers_cache.end()) {
            header_out = header->second;
            return true;
        }
    }

    DBVal entry;
    if (!LookupOne(*m_db, block_index, entry)) {
        return false;
    }

    if (is_checkpoint &&
        m_headers_cache.size() < CF_HEADERS_CACHE_MAX_SZ) {
        // Add to the headers cache if this is a checkpoint height.
        m_headers_cache.emplace(block_index->GetBlockHash(), entry.header);
    }

    header_out = entry.header;
    return true;
}

bool BlockFilterIndex::LookupFilterRange(int start_height, const CBlockIndex* stop_index,
                                         std::vector<BlockFilter>& filters_out) const