Method Rewind

src/index/blockfilterindex.cpp:281–302

}

bool BlockFilterIndex::Rewind(const CBlockIndex* current_tip, const CBlockIndex* new_tip)
{
    assert(current_tip->GetAncestor(new_tip->nHeight) == new_tip);

    CDBBatch batch(*m_db);
    std::unique_ptr<CDBIterator> db_it(m_db->NewIterator());

    // During a reorg, we need to copy all filters for blocks that are getting disconnected from the
    // height index to the hash index so we can still find them when the height index entries are
    // overwritten.
    if (!CopyHeightIndexToHashIndex(*db_it, batch, m_name, new_tip->nHeight, current_tip->nHeight)) {
        return false;
    }

    // The latest filter position gets written in Commit by the call to the BaseIndex::Rewind.
    // But since this creates new references to the filter, the position should get updated here
    // atomically as well in case Commit fails.
    batch.Write(DB_FILTER_POS, m_next_filter_pos);
    if (!m_db->WriteBatch(batch)) return false;

    return BaseIndex::Rewind(current_tip, new_tip);
}

static bool LookupOne(const CDBWrapper& db, const CBlockIndex* block_index, DBVal& result)
{