LCOV - code coverage report
Current view: top level - src/index - blockfilterindex.cpp (source / functions) Coverage Total Hit
Test: fuzz_coverage.info Lines: 2.8 % 217 6
Test Date: 2026-09-23 06:36:48 Functions: 9.5 % 21 2
Branches: 0.7 % 269 2

             Branch data     Line data    Source code
       1                 :             : // Copyright (c) 2018-present The Bitcoin Core developers
       2                 :             : // Distributed under the MIT software license, see the accompanying
       3                 :             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4                 :             : 
       5                 :             : #include <index/blockfilterindex.h>
       6                 :             : 
       7                 :             : #include <blockfilter.h>
       8                 :             : #include <chain.h>
       9                 :             : #include <common/args.h>
      10                 :             : #include <dbwrapper.h>
      11                 :             : #include <flatfile.h>
      12                 :             : #include <hash.h>
      13                 :             : #include <index/base.h>
      14                 :             : #include <index/db_key.h>
      15                 :             : #include <interfaces/chain.h>
      16                 :             : #include <interfaces/types.h>
      17                 :             : #include <serialize.h>
      18                 :             : #include <streams.h>
      19                 :             : #include <sync.h>
      20                 :             : #include <uint256.h>
      21                 :             : #include <util/check.h>
      22                 :             : #include <util/byte_units.h>
      23                 :             : #include <util/fs.h>
      24                 :             : #include <util/hasher.h>
      25                 :             : #include <util/log.h>
      26                 :             : #include <util/syserror.h>
      27                 :             : 
      28                 :             : #include <cerrno>
      29                 :             : #include <exception>
      30                 :             : #include <map>
      31                 :             : #include <optional>
      32                 :             : #include <stdexcept>
      33                 :             : #include <string>
      34                 :             : #include <tuple>
      35                 :             : #include <utility>
      36                 :             : #include <vector>
      37                 :             : 
      38                 :             : /* The index database stores three items for each block: the disk location of the encoded filter,
      39                 :             :  * its dSHA256 hash, and the header. Those belonging to blocks on the active chain are indexed by
      40                 :             :  * height, and those belonging to blocks that have been reorganized out of the active chain are
      41                 :             :  * indexed by block hash. This ensures that filter data for any block that becomes part of the
      42                 :             :  * active chain can always be retrieved, alleviating timing concerns.
      43                 :             :  *
      44                 :             :  * The filters themselves are stored in flat files and referenced by the LevelDB entries. This
      45                 :             :  * minimizes the amount of data written to LevelDB and keeps the database values constant size. The
      46                 :             :  * disk location of the next block filter to be written (represented as a FlatFilePos) is stored
      47                 :             :  * under the DB_FILTER_POS key.
      48                 :             :  *
      49                 :             :  * The logic for keys is shared with other indexes, see index/db_key.h.
      50                 :             :  */
      51                 :             : constexpr uint8_t DB_FILTER_POS{'P'};
      52                 :             : 
      53                 :             : constexpr unsigned int MAX_FLTR_FILE_SIZE{16_MiB};
      54                 :             : /** The pre-allocation chunk size for fltr?????.dat files */
      55                 :             : constexpr unsigned int FLTR_FILE_CHUNK_SIZE{1_MiB};
      56                 :             : /** Maximum size of the cfheaders cache
      57                 :             :  *  We have a limit to prevent a bug in filling this cache
      58                 :             :  *  potentially turning into an OOM. At 2000 entries, this cache
      59                 :             :  *  is big enough for a 2,000,000 length block chain, which
      60                 :             :  *  we should be enough until ~2047. */
      61                 :             : constexpr size_t CF_HEADERS_CACHE_MAX_SZ{2000};
      62                 :             : 
      63                 :             : namespace {
      64                 :             : 
      65                 :           0 : std::string BlockFilterThreadName(BlockFilterType filter_type)
      66                 :             : {
      67      [ #  #  # ]:           0 :     switch (filter_type) {
      68                 :           0 :     case BlockFilterType::BASIC: return "blkfltbscidx";
      69                 :           0 :     case BlockFilterType::INVALID: return "";
      70                 :             :     } // no default case, so the compiler can warn about missing cases
      71                 :           0 :     assert(false);
      72                 :             : }
      73                 :             : 
      74                 :           0 : struct DBVal {
      75                 :             :     uint256 hash;
      76                 :             :     uint256 header;
      77                 :             :     FlatFilePos pos;
      78                 :             : 
      79                 :           0 :     SERIALIZE_METHODS(DBVal, obj) { READWRITE(obj.hash, obj.header, obj.pos); }
      80                 :             : };
      81                 :             : 
      82                 :             : }; // namespace
      83                 :             : 
      84                 :             : static std::map<BlockFilterType, BlockFilterIndex> g_filter_indexes;
      85                 :             : 
      86                 :           0 : BlockFilterIndex::BlockFilterIndex(std::unique_ptr<interfaces::Chain> chain, BlockFilterType filter_type,
      87                 :           0 :                                    size_t n_cache_size, bool f_memory, bool f_wipe)
      88   [ #  #  #  # ]:           0 :     : BaseIndex(std::move(chain), BlockFilterTypeName(filter_type) + " block filter index", BlockFilterThreadName(filter_type))
      89   [ #  #  #  # ]:           0 :     , m_filter_type(filter_type)
      90                 :             : {
      91         [ #  # ]:           0 :     const std::string& filter_name = BlockFilterTypeName(filter_type);
      92   [ #  #  #  # ]:           0 :     if (filter_name.empty()) throw std::invalid_argument("unknown filter_type");
      93                 :             : 
      94   [ #  #  #  #  :           0 :     fs::path path = gArgs.GetDataDirNet() / "indexes" / "blockfilter" / fs::u8path(filter_name);
          #  #  #  #  #  
                      # ]
      95         [ #  # ]:           0 :     fs::create_directories(path);
      96                 :             : 
      97   [ #  #  #  #  :           0 :     m_db = std::make_unique<BaseIndex::DB>(path / "db", n_cache_size, f_memory, f_wipe);
                   #  # ]
      98         [ #  # ]:           0 :     m_filter_fileseq = std::make_unique<FlatFileSeq>(std::move(path), "fltr", FLTR_FILE_CHUNK_SIZE);
      99                 :           0 : }
     100                 :             : 
     101                 :           0 : interfaces::Chain::NotifyOptions BlockFilterIndex::CustomOptions()
     102                 :             : {
     103                 :           0 :     interfaces::Chain::NotifyOptions options;
     104                 :           0 :     options.connect_undo_data = true;
     105                 :           0 :     return options;
     106                 :             : }
     107                 :             : 
     108                 :           0 : bool BlockFilterIndex::CustomInit(const std::optional<interfaces::BlockRef>& block)
     109                 :             : {
     110         [ #  # ]:           0 :     if (!m_db->Read(DB_FILTER_POS, m_next_filter_pos)) {
     111                 :             :         // Check that the cause of the read failure is that the key does not exist. Any other errors
     112                 :             :         // indicate database corruption or a disk failure, and starting the index would cause
     113                 :             :         // further corruption.
     114         [ #  # ]:           0 :         if (m_db->Exists(DB_FILTER_POS)) {
     115                 :           0 :             LogError("Cannot read current %s state; index may be corrupted",
     116                 :             :                       GetName());
     117                 :           0 :             return false;
     118                 :             :         }
     119                 :             : 
     120                 :             :         // If the DB_FILTER_POS is not set, then initialize to the first location.
     121                 :           0 :         m_next_filter_pos.nFile = 0;
     122                 :           0 :         m_next_filter_pos.nPos = 0;
     123                 :             :     }
     124                 :             : 
     125         [ #  # ]:           0 :     if (block) {
     126                 :           0 :         auto op_last_header = ReadFilterHeader(block->height, block->hash);
     127         [ #  # ]:           0 :         if (!op_last_header) {
     128                 :           0 :             LogError("Cannot read last block filter header; index may be corrupted");
     129                 :           0 :             return false;
     130                 :             :         }
     131                 :           0 :         m_last_header = *op_last_header;
     132                 :             :     }
     133                 :             : 
     134                 :             :     return true;
     135                 :             : }
     136                 :             : 
     137                 :           0 : bool BlockFilterIndex::CustomCommit(CDBBatch& batch)
     138                 :             : {
     139                 :           0 :     const FlatFilePos& pos = m_next_filter_pos;
     140                 :             : 
     141                 :             :     // Flush current filter file to disk.
     142                 :           0 :     AutoFile file{m_filter_fileseq->Open(pos)};
     143         [ #  # ]:           0 :     if (file.IsNull()) {
     144         [ #  # ]:           0 :         LogError("Failed to open filter file %d", pos.nFile);
     145                 :             :         return false;
     146                 :             :     }
     147   [ #  #  #  # ]:           0 :     if (!file.Commit()) {
     148         [ #  # ]:           0 :         LogError("Failed to commit filter file %d", pos.nFile);
     149         [ #  # ]:           0 :         (void)file.fclose();
     150                 :             :         return false;
     151                 :             :     }
     152   [ #  #  #  # ]:           0 :     if (file.fclose() != 0) {
     153   [ #  #  #  # ]:           0 :         LogError("Failed to close filter file %d after commit: %s", pos.nFile, SysErrorString(errno));
     154                 :           0 :         return false;
     155                 :             :     }
     156                 :             : 
     157         [ #  # ]:           0 :     batch.Write(DB_FILTER_POS, pos);
     158                 :             :     return true;
     159                 :           0 : }
     160                 :             : 
     161                 :           0 : bool BlockFilterIndex::ReadFilterFromDisk(const FlatFilePos& pos, const uint256& hash, BlockFilter& filter) const
     162                 :             : {
     163                 :           0 :     AutoFile filein{m_filter_fileseq->Open(pos, true)};
     164         [ #  # ]:           0 :     if (filein.IsNull()) {
     165                 :             :         return false;
     166                 :             :     }
     167                 :             : 
     168                 :             :     // Check that the hash of the encoded_filter matches the one stored in the db.
     169                 :           0 :     uint256 block_hash;
     170                 :           0 :     std::vector<uint8_t> encoded_filter;
     171                 :           0 :     try {
     172   [ #  #  #  # ]:           0 :         filein >> block_hash >> encoded_filter;
     173         [ #  # ]:           0 :         if (Hash(encoded_filter) != hash) {
     174         [ #  # ]:           0 :             LogError("Checksum mismatch in filter decode.");
     175                 :             :             return false;
     176                 :             :         }
     177         [ #  # ]:           0 :         filter = BlockFilter(GetFilterType(), block_hash, std::move(encoded_filter), /*skip_decode_check=*/true);
     178                 :             :     }
     179         [ -  - ]:           0 :     catch (const std::exception& e) {
     180         [ -  - ]:           0 :         LogError("Failed to deserialize block filter from disk: %s", e.what());
     181                 :           0 :         return false;
     182                 :           0 :     }
     183                 :             : 
     184                 :           0 :     return true;
     185                 :           0 : }
     186                 :             : 
     187                 :           0 : size_t BlockFilterIndex::WriteFilterToDisk(FlatFilePos& pos, const BlockFilter& filter)
     188                 :             : {
     189         [ #  # ]:           0 :     assert(filter.GetFilterType() == GetFilterType());
     190                 :             : 
     191                 :           0 :     uint64_t data_size{
     192                 :           0 :         GetSerializeSize(filter.GetBlockHash()) +
     193                 :           0 :         GetSerializeSize(filter.GetEncodedFilter())};
     194                 :             : 
     195                 :             :     // If writing the filter would overflow the file, flush and move to the next one.
     196         [ #  # ]:           0 :     if (pos.nPos + data_size > MAX_FLTR_FILE_SIZE) {
     197                 :           0 :         AutoFile last_file{m_filter_fileseq->Open(pos)};
     198         [ #  # ]:           0 :         if (last_file.IsNull()) {
     199         [ #  # ]:           0 :             LogError("Failed to open filter file %d", pos.nFile);
     200                 :             :             return 0;
     201                 :             :         }
     202   [ #  #  #  # ]:           0 :         if (!last_file.Truncate(pos.nPos)) {
     203         [ #  # ]:           0 :             LogError("Failed to truncate filter file %d", pos.nFile);
     204                 :             :             return 0;
     205                 :             :         }
     206   [ #  #  #  # ]:           0 :         if (!last_file.Commit()) {
     207         [ #  # ]:           0 :             LogError("Failed to commit filter file %d", pos.nFile);
     208         [ #  # ]:           0 :             (void)last_file.fclose();
     209                 :             :             return 0;
     210                 :             :         }
     211   [ #  #  #  # ]:           0 :         if (last_file.fclose() != 0) {
     212   [ #  #  #  # ]:           0 :             LogError("Failed to close filter file %d after commit: %s", pos.nFile, SysErrorString(errno));
     213                 :           0 :             return 0;
     214                 :             :         }
     215                 :             : 
     216                 :           0 :         pos.nFile++;
     217                 :           0 :         pos.nPos = 0;
     218                 :           0 :     }
     219                 :             : 
     220                 :             :     // Pre-allocate sufficient space for filter data.
     221                 :           0 :     bool out_of_space;
     222                 :           0 :     m_filter_fileseq->Allocate(pos, data_size, out_of_space);
     223         [ #  # ]:           0 :     if (out_of_space) {
     224                 :           0 :         LogError("out of disk space");
     225                 :           0 :         return 0;
     226                 :             :     }
     227                 :             : 
     228                 :           0 :     AutoFile fileout{m_filter_fileseq->Open(pos)};
     229         [ #  # ]:           0 :     if (fileout.IsNull()) {
     230         [ #  # ]:           0 :         LogError("Failed to open filter file %d", pos.nFile);
     231                 :             :         return 0;
     232                 :             :     }
     233                 :             : 
     234   [ #  #  #  # ]:           0 :     fileout << filter.GetBlockHash() << filter.GetEncodedFilter();
     235                 :             : 
     236   [ #  #  #  # ]:           0 :     if (fileout.fclose() != 0) {
     237   [ #  #  #  # ]:           0 :         LogError("Failed to close filter file %d: %s", pos.nFile, SysErrorString(errno));
     238                 :           0 :         return 0;
     239                 :             :     }
     240                 :             : 
     241                 :             :     return data_size;
     242                 :           0 : }
     243                 :             : 
     244                 :           0 : std::optional<uint256> BlockFilterIndex::ReadFilterHeader(int height, const uint256& expected_block_hash)
     245                 :             : {
     246                 :           0 :     std::pair<uint256, DBVal> read_out;
     247         [ #  # ]:           0 :     if (!m_db->Read(index_util::DBHeightKey(height), read_out)) {
     248                 :           0 :         return std::nullopt;
     249                 :             :     }
     250                 :             : 
     251         [ #  # ]:           0 :     if (read_out.first != expected_block_hash) {
     252   [ #  #  #  # ]:           0 :         LogError("previous block header belongs to unexpected block %s; expected %s",
     253                 :             :                  read_out.first.ToString(), expected_block_hash.ToString());
     254                 :           0 :         return std::nullopt;
     255                 :             :     }
     256                 :             : 
     257                 :           0 :     return read_out.second.header;
     258                 :             : }
     259                 :             : 
     260                 :           0 : bool BlockFilterIndex::CustomAppend(const interfaces::BlockInfo& block)
     261                 :             : {
     262   [ #  #  #  # ]:           0 :     BlockFilter filter(m_filter_type, *Assert(block.data), *Assert(block.undo_data));
     263         [ #  # ]:           0 :     const uint256& header = filter.ComputeHeader(m_last_header);
     264         [ #  # ]:           0 :     bool res = Write(filter, block.height, header);
     265         [ #  # ]:           0 :     if (res) m_last_header = header; // update last header
     266                 :           0 :     return res;
     267                 :           0 : }
     268                 :             : 
     269                 :           0 : bool BlockFilterIndex::Write(const BlockFilter& filter, uint32_t block_height, const uint256& filter_header)
     270                 :             : {
     271                 :           0 :     size_t bytes_written = WriteFilterToDisk(m_next_filter_pos, filter);
     272         [ #  # ]:           0 :     if (bytes_written == 0) return false;
     273                 :             : 
     274                 :           0 :     std::pair<uint256, DBVal> value;
     275                 :           0 :     value.first = filter.GetBlockHash();
     276                 :           0 :     value.second.hash = filter.GetHash();
     277                 :           0 :     value.second.header = filter_header;
     278                 :           0 :     value.second.pos = m_next_filter_pos;
     279                 :             : 
     280                 :           0 :     m_db->Write(index_util::DBHeightKey(block_height), value);
     281                 :             : 
     282                 :           0 :     m_next_filter_pos.nPos += bytes_written;
     283                 :           0 :     return true;
     284                 :             : }
     285                 :             : 
     286                 :           0 : bool BlockFilterIndex::CustomRemove(const interfaces::BlockInfo& block)
     287                 :             : {
     288                 :           0 :     CDBBatch batch(*m_db);
     289   [ #  #  #  # ]:           0 :     std::unique_ptr<CDBIterator> db_it(m_db->NewIterator());
     290                 :             : 
     291                 :             :     // During a reorg, we need to copy block filter that is getting disconnected from the
     292                 :             :     // height index to the hash index so we can still find it when the height index entry
     293                 :             :     // is overwritten.
     294   [ #  #  #  # ]:           0 :     if (!index_util::CopyHeightIndexToHashIndex<DBVal>(*db_it, batch, m_name, block.height)) {
     295                 :             :         return false;
     296                 :             :     }
     297                 :             : 
     298                 :             :     // The latest filter position gets written in Commit by the call to the BaseIndex::Rewind.
     299                 :             :     // But since this creates new references to the filter, the position should get updated here
     300                 :             :     // atomically as well in case Commit fails.
     301         [ #  # ]:           0 :     batch.Write(DB_FILTER_POS, m_next_filter_pos);
     302         [ #  # ]:           0 :     m_db->WriteBatch(batch);
     303                 :             : 
     304                 :             :     // Update cached header to the previous block hash
     305   [ #  #  #  # ]:           0 :     m_last_header = *Assert(ReadFilterHeader(block.height - 1, *Assert(block.prev_hash)));
     306                 :           0 :     return true;
     307                 :           0 : }
     308                 :             : 
     309                 :           0 : static bool LookupRange(CDBWrapper& db, const std::string& index_name, int start_height,
     310                 :             :                         const CBlockIndex* stop_index, std::vector<DBVal>& results)
     311                 :             : {
     312         [ #  # ]:           0 :     if (start_height < 0) {
     313                 :           0 :         LogError("start height (%d) is negative", start_height);
     314                 :           0 :         return false;
     315                 :             :     }
     316         [ #  # ]:           0 :     if (start_height > stop_index->nHeight) {
     317                 :           0 :         LogError("start height (%d) is greater than stop height (%d)",
     318                 :             :                  start_height, stop_index->nHeight);
     319                 :           0 :         return false;
     320                 :             :     }
     321                 :             : 
     322                 :           0 :     size_t results_size = static_cast<size_t>(stop_index->nHeight - start_height + 1);
     323                 :           0 :     std::vector<std::pair<uint256, DBVal>> values(results_size);
     324                 :             : 
     325         [ #  # ]:           0 :     index_util::DBHeightKey key(start_height);
     326   [ #  #  #  # ]:           0 :     std::unique_ptr<CDBIterator> db_it(db.NewIterator());
     327         [ #  # ]:           0 :     db_it->Seek(index_util::DBHeightKey(start_height));
     328         [ #  # ]:           0 :     for (int height = start_height; height <= stop_index->nHeight; ++height) {
     329   [ #  #  #  #  :           0 :         if (!db_it->Valid() || !db_it->GetKey(key) || key.height != height) {
          #  #  #  #  #  
                      # ]
     330                 :           0 :             return false;
     331                 :             :         }
     332                 :             : 
     333                 :           0 :         size_t i = static_cast<size_t>(height - start_height);
     334   [ #  #  #  # ]:           0 :         if (!db_it->GetValue(values[i])) {
     335         [ #  # ]:           0 :             LogError("unable to read value in %s at key (%c, %d)",
     336                 :             :                      index_name, index_util::DB_BLOCK_HEIGHT, height);
     337                 :             :             return false;
     338                 :             :         }
     339                 :             : 
     340         [ #  # ]:           0 :         db_it->Next();
     341                 :             :     }
     342                 :             : 
     343         [ #  # ]:           0 :     results.resize(results_size);
     344                 :             : 
     345                 :             :     // Iterate backwards through block indexes collecting results in order to access the block hash
     346                 :             :     // of each entry in case we need to look it up in the hash index.
     347                 :           0 :     for (const CBlockIndex* block_index = stop_index;
     348   [ #  #  #  # ]:           0 :          block_index && block_index->nHeight >= start_height;
     349                 :           0 :          block_index = block_index->pprev) {
     350                 :           0 :         uint256 block_hash = block_index->GetBlockHash();
     351                 :             : 
     352                 :           0 :         size_t i = static_cast<size_t>(block_index->nHeight - start_height);
     353         [ #  # ]:           0 :         if (block_hash == values[i].first) {
     354                 :           0 :             results[i] = std::move(values[i].second);
     355                 :           0 :             continue;
     356                 :             :         }
     357                 :             : 
     358   [ #  #  #  # ]:           0 :         if (!db.Read(index_util::DBHashKey(block_hash), results[i])) {
     359   [ #  #  #  # ]:           0 :             LogError("unable to read value in %s at key (%c, %s)",
     360                 :             :                      index_name, index_util::DB_BLOCK_HASH, block_hash.ToString());
     361                 :           0 :             return false;
     362                 :             :         }
     363                 :             :     }
     364                 :             : 
     365                 :             :     return true;
     366                 :           0 : }
     367                 :             : 
     368                 :           0 : bool BlockFilterIndex::LookupFilter(const CBlockIndex* block_index, BlockFilter& filter_out) const
     369                 :             : {
     370                 :           0 :     DBVal entry;
     371         [ #  # ]:           0 :     if (!index_util::LookUpOne(*m_db, {block_index->GetBlockHash(), block_index->nHeight}, entry)) {
     372                 :             :         return false;
     373                 :             :     }
     374                 :             : 
     375                 :           0 :     return ReadFilterFromDisk(entry.pos, entry.hash, filter_out);
     376                 :             : }
     377                 :             : 
     378                 :           0 : bool BlockFilterIndex::LookupFilterHeader(const CBlockIndex* block_index, uint256& header_out)
     379                 :             : {
     380                 :           0 :     LOCK(m_cs_headers_cache);
     381                 :             : 
     382                 :           0 :     bool is_checkpoint{block_index->nHeight % CFCHECKPT_INTERVAL == 0};
     383                 :             : 
     384         [ #  # ]:           0 :     if (is_checkpoint) {
     385                 :             :         // Try to find the block in the headers cache if this is a checkpoint height.
     386                 :           0 :         auto header = m_headers_cache.find(block_index->GetBlockHash());
     387         [ #  # ]:           0 :         if (header != m_headers_cache.end()) {
     388                 :           0 :             header_out = header->second;
     389                 :           0 :             return true;
     390                 :             :         }
     391                 :             :     }
     392                 :             : 
     393                 :           0 :     DBVal entry;
     394   [ #  #  #  # ]:           0 :     if (!index_util::LookUpOne(*m_db, {block_index->GetBlockHash(), block_index->nHeight}, entry)) {
     395                 :             :         return false;
     396                 :             :     }
     397                 :             : 
     398   [ #  #  #  # ]:           0 :     if (is_checkpoint &&
     399         [ #  # ]:           0 :         m_headers_cache.size() < CF_HEADERS_CACHE_MAX_SZ) {
     400                 :             :         // Add to the headers cache if this is a checkpoint height.
     401         [ #  # ]:           0 :         m_headers_cache.emplace(block_index->GetBlockHash(), entry.header);
     402                 :             :     }
     403                 :             : 
     404                 :           0 :     header_out = entry.header;
     405                 :           0 :     return true;
     406                 :           0 : }
     407                 :             : 
     408                 :           0 : bool BlockFilterIndex::LookupFilterRange(int start_height, const CBlockIndex* stop_index,
     409                 :             :                                          std::vector<BlockFilter>& filters_out) const
     410                 :             : {
     411                 :           0 :     std::vector<DBVal> entries;
     412   [ #  #  #  # ]:           0 :     if (!LookupRange(*m_db, m_name, start_height, stop_index, entries)) {
     413                 :             :         return false;
     414                 :             :     }
     415                 :             : 
     416   [ #  #  #  # ]:           0 :     filters_out.resize(entries.size());
     417                 :           0 :     auto filter_pos_it = filters_out.begin();
     418         [ #  # ]:           0 :     for (const auto& entry : entries) {
     419   [ #  #  #  # ]:           0 :         if (!ReadFilterFromDisk(entry.pos, entry.hash, *filter_pos_it)) {
     420                 :             :             return false;
     421                 :             :         }
     422                 :           0 :         ++filter_pos_it;
     423                 :             :     }
     424                 :             : 
     425                 :             :     return true;
     426                 :           0 : }
     427                 :             : 
     428                 :           0 : bool BlockFilterIndex::LookupFilterHashRange(int start_height, const CBlockIndex* stop_index,
     429                 :             :                                              std::vector<uint256>& hashes_out) const
     430                 :             : 
     431                 :             : {
     432                 :           0 :     std::vector<DBVal> entries;
     433   [ #  #  #  # ]:           0 :     if (!LookupRange(*m_db, m_name, start_height, stop_index, entries)) {
     434                 :             :         return false;
     435                 :             :     }
     436                 :             : 
     437         [ #  # ]:           0 :     hashes_out.clear();
     438   [ #  #  #  # ]:           0 :     hashes_out.reserve(entries.size());
     439         [ #  # ]:           0 :     for (const auto& entry : entries) {
     440         [ #  # ]:           0 :         hashes_out.push_back(entry.hash);
     441                 :             :     }
     442                 :             :     return true;
     443                 :           0 : }
     444                 :             : 
     445                 :           3 : BlockFilterIndex* GetBlockFilterIndex(BlockFilterType filter_type)
     446                 :             : {
     447                 :           3 :     auto it = g_filter_indexes.find(filter_type);
     448         [ -  + ]:           3 :     return it != g_filter_indexes.end() ? &it->second : nullptr;
     449                 :             : }
     450                 :             : 
     451                 :           7 : void ForEachBlockFilterIndex(std::function<void (BlockFilterIndex&)> fn)
     452                 :             : {
     453         [ -  + ]:           7 :     for (auto& entry : g_filter_indexes) fn(entry.second);
     454                 :           7 : }
     455                 :             : 
     456                 :           0 : bool InitBlockFilterIndex(std::function<std::unique_ptr<interfaces::Chain>()> make_chain, BlockFilterType filter_type,
     457                 :             :                           size_t n_cache_size, bool f_memory, bool f_wipe)
     458                 :             : {
     459                 :           0 :     auto result = g_filter_indexes.emplace(std::piecewise_construct,
     460         [ #  # ]:           0 :                                            std::forward_as_tuple(filter_type),
     461         [ #  # ]:           0 :                                            std::forward_as_tuple(make_chain(), filter_type,
     462                 :             :                                                                  n_cache_size, f_memory, f_wipe));
     463                 :           0 :     return result.second;
     464                 :             : }
     465                 :             : 
     466                 :           0 : bool DestroyBlockFilterIndex(BlockFilterType filter_type)
     467                 :             : {
     468                 :           0 :     return g_filter_indexes.erase(filter_type);
     469                 :             : }
     470                 :             : 
     471                 :           0 : void DestroyAllBlockFilterIndexes()
     472                 :             : {
     473                 :           0 :     g_filter_indexes.clear();
     474                 :           0 : }
        

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