Branch data Line data Source code
1 : : // Copyright (c) 2018-2022 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 <map>
6 : :
7 : : #include <clientversion.h>
8 : : #include <common/args.h>
9 : : #include <dbwrapper.h>
10 : : #include <hash.h>
11 : : #include <index/blockfilterindex.h>
12 : : #include <logging.h>
13 : : #include <node/blockstorage.h>
14 : : #include <undo.h>
15 : : #include <util/fs_helpers.h>
16 : : #include <validation.h>
17 : :
18 : : /* The index database stores three items for each block: the disk location of the encoded filter,
19 : : * its dSHA256 hash, and the header. Those belonging to blocks on the active chain are indexed by
20 : : * height, and those belonging to blocks that have been reorganized out of the active chain are
21 : : * indexed by block hash. This ensures that filter data for any block that becomes part of the
22 : : * active chain can always be retrieved, alleviating timing concerns.
23 : : *
24 : : * The filters themselves are stored in flat files and referenced by the LevelDB entries. This
25 : : * minimizes the amount of data written to LevelDB and keeps the database values constant size. The
26 : : * disk location of the next block filter to be written (represented as a FlatFilePos) is stored
27 : : * under the DB_FILTER_POS key.
28 : : *
29 : : * Keys for the height index have the type [DB_BLOCK_HEIGHT, uint32 (BE)]. The height is represented
30 : : * as big-endian so that sequential reads of filters by height are fast.
31 : : * Keys for the hash index have the type [DB_BLOCK_HASH, uint256].
32 : : */
33 : : constexpr uint8_t DB_BLOCK_HASH{'s'};
34 : : constexpr uint8_t DB_BLOCK_HEIGHT{'t'};
35 : : constexpr uint8_t DB_FILTER_POS{'P'};
36 : :
37 : : constexpr unsigned int MAX_FLTR_FILE_SIZE = 0x1000000; // 16 MiB
38 : : /** The pre-allocation chunk size for fltr?????.dat files */
39 : : constexpr unsigned int FLTR_FILE_CHUNK_SIZE = 0x100000; // 1 MiB
40 : : /** Maximum size of the cfheaders cache
41 : : * We have a limit to prevent a bug in filling this cache
42 : : * potentially turning into an OOM. At 2000 entries, this cache
43 : : * is big enough for a 2,000,000 length block chain, which
44 : : * we should be enough until ~2047. */
45 : : constexpr size_t CF_HEADERS_CACHE_MAX_SZ{2000};
46 : :
47 : : namespace {
48 : :
49 : 0 : struct DBVal {
50 : : uint256 hash;
51 : : uint256 header;
52 : : FlatFilePos pos;
53 : :
54 : 0 : SERIALIZE_METHODS(DBVal, obj) { READWRITE(obj.hash, obj.header, obj.pos); }
55 : : };
56 : :
57 : : struct DBHeightKey {
58 : : int height;
59 : :
60 [ # # ]: 0 : explicit DBHeightKey(int height_in) : height(height_in) {}
61 : :
62 : : template<typename Stream>
63 : 0 : void Serialize(Stream& s) const
64 : : {
65 : 0 : ser_writedata8(s, DB_BLOCK_HEIGHT);
66 : 0 : ser_writedata32be(s, height);
67 : 0 : }
68 : :
69 : : template<typename Stream>
70 : 0 : void Unserialize(Stream& s)
71 : : {
72 : 0 : const uint8_t prefix{ser_readdata8(s)};
73 [ # # ]: 0 : if (prefix != DB_BLOCK_HEIGHT) {
74 [ # # ]: 0 : throw std::ios_base::failure("Invalid format for block filter index DB height key");
75 : : }
76 : 0 : height = ser_readdata32be(s);
77 : 0 : }
78 : : };
79 : :
80 : : struct DBHashKey {
81 : : uint256 hash;
82 : :
83 [ # # ]: 0 : explicit DBHashKey(const uint256& hash_in) : hash(hash_in) {}
84 : :
85 : 0 : SERIALIZE_METHODS(DBHashKey, obj) {
86 : 0 : uint8_t prefix{DB_BLOCK_HASH};
87 : 0 : READWRITE(prefix);
88 [ # # ]: 0 : if (prefix != DB_BLOCK_HASH) {
89 [ # # ]: 0 : throw std::ios_base::failure("Invalid format for block filter index DB hash key");
90 : : }
91 : :
92 : 0 : READWRITE(obj.hash);
93 : 0 : }
94 : : };
95 : :
96 : : }; // namespace
97 : :
98 : : static std::map<BlockFilterType, BlockFilterIndex> g_filter_indexes;
99 : :
100 : 0 : BlockFilterIndex::BlockFilterIndex(std::unique_ptr<interfaces::Chain> chain, BlockFilterType filter_type,
101 : 0 : size_t n_cache_size, bool f_memory, bool f_wipe)
102 [ # # ]: 0 : : BaseIndex(std::move(chain), BlockFilterTypeName(filter_type) + " block filter index")
103 [ # # # # ]: 0 : , m_filter_type(filter_type)
104 : : {
105 [ # # ]: 0 : const std::string& filter_name = BlockFilterTypeName(filter_type);
106 [ # # # # ]: 0 : if (filter_name.empty()) throw std::invalid_argument("unknown filter_type");
107 : :
108 [ # # # # : 0 : fs::path path = gArgs.GetDataDirNet() / "indexes" / "blockfilter" / fs::u8path(filter_name);
# # # # ]
109 [ # # ]: 0 : fs::create_directories(path);
110 : :
111 [ # # # # : 0 : m_db = std::make_unique<BaseIndex::DB>(path / "db", n_cache_size, f_memory, f_wipe);
# # ]
112 [ # # ]: 0 : m_filter_fileseq = std::make_unique<FlatFileSeq>(std::move(path), "fltr", FLTR_FILE_CHUNK_SIZE);
113 : 0 : }
114 : :
115 : 0 : bool BlockFilterIndex::CustomInit(const std::optional<interfaces::BlockRef>& block)
116 : : {
117 [ # # ]: 0 : if (!m_db->Read(DB_FILTER_POS, m_next_filter_pos)) {
118 : : // Check that the cause of the read failure is that the key does not exist. Any other errors
119 : : // indicate database corruption or a disk failure, and starting the index would cause
120 : : // further corruption.
121 [ # # ]: 0 : if (m_db->Exists(DB_FILTER_POS)) {
122 : 0 : LogError("%s: Cannot read current %s state; index may be corrupted\n",
123 : : __func__, GetName());
124 : 0 : return false;
125 : : }
126 : :
127 : : // If the DB_FILTER_POS is not set, then initialize to the first location.
128 : 0 : m_next_filter_pos.nFile = 0;
129 : 0 : m_next_filter_pos.nPos = 0;
130 : : }
131 : :
132 [ # # ]: 0 : if (block) {
133 : 0 : auto op_last_header = ReadFilterHeader(block->height, block->hash);
134 [ # # ]: 0 : if (!op_last_header) {
135 : 0 : LogError("Cannot read last block filter header; index may be corrupted\n");
136 : 0 : return false;
137 : : }
138 : 0 : m_last_header = *op_last_header;
139 : : }
140 : :
141 : : return true;
142 : : }
143 : :
144 : 0 : bool BlockFilterIndex::CustomCommit(CDBBatch& batch)
145 : : {
146 : 0 : const FlatFilePos& pos = m_next_filter_pos;
147 : :
148 : : // Flush current filter file to disk.
149 [ # # ]: 0 : AutoFile file{m_filter_fileseq->Open(pos)};
150 [ # # ]: 0 : if (file.IsNull()) {
151 [ # # ]: 0 : LogError("%s: Failed to open filter file %d\n", __func__, pos.nFile);
152 : : return false;
153 : : }
154 [ # # # # ]: 0 : if (!file.Commit()) {
155 [ # # ]: 0 : LogError("%s: Failed to commit filter file %d\n", __func__, pos.nFile);
156 : : return false;
157 : : }
158 : :
159 [ # # ]: 0 : batch.Write(DB_FILTER_POS, pos);
160 : : return true;
161 : 0 : }
162 : :
163 : 0 : bool BlockFilterIndex::ReadFilterFromDisk(const FlatFilePos& pos, const uint256& hash, BlockFilter& filter) const
164 : : {
165 [ # # ]: 0 : AutoFile filein{m_filter_fileseq->Open(pos, true)};
166 [ # # ]: 0 : if (filein.IsNull()) {
167 : : return false;
168 : : }
169 : :
170 : : // Check that the hash of the encoded_filter matches the one stored in the db.
171 : 0 : uint256 block_hash;
172 : 0 : std::vector<uint8_t> encoded_filter;
173 : 0 : try {
174 [ # # # # ]: 0 : filein >> block_hash >> encoded_filter;
175 [ # # # # ]: 0 : if (Hash(encoded_filter) != hash) {
176 [ # # ]: 0 : LogError("Checksum mismatch in filter decode.\n");
177 : : return false;
178 : : }
179 [ # # ]: 0 : filter = BlockFilter(GetFilterType(), block_hash, std::move(encoded_filter), /*skip_decode_check=*/true);
180 : : }
181 [ - - ]: 0 : catch (const std::exception& e) {
182 [ - - ]: 0 : LogError("%s: Failed to deserialize block filter from disk: %s\n", __func__, e.what());
183 : 0 : return false;
184 : 0 : }
185 : :
186 : 0 : return true;
187 : 0 : }
188 : :
189 : 0 : size_t BlockFilterIndex::WriteFilterToDisk(FlatFilePos& pos, const BlockFilter& filter)
190 : : {
191 [ # # ]: 0 : assert(filter.GetFilterType() == GetFilterType());
192 : :
193 : 0 : size_t data_size =
194 : 0 : GetSerializeSize(filter.GetBlockHash()) +
195 : 0 : GetSerializeSize(filter.GetEncodedFilter());
196 : :
197 : : // If writing the filter would overflow the file, flush and move to the next one.
198 [ # # ]: 0 : if (pos.nPos + data_size > MAX_FLTR_FILE_SIZE) {
199 [ # # ]: 0 : AutoFile last_file{m_filter_fileseq->Open(pos)};
200 [ # # ]: 0 : if (last_file.IsNull()) {
201 [ # # ]: 0 : LogPrintf("%s: Failed to open filter file %d\n", __func__, pos.nFile);
202 : : return 0;
203 : : }
204 [ # # # # ]: 0 : if (!last_file.Truncate(pos.nPos)) {
205 [ # # ]: 0 : LogPrintf("%s: Failed to truncate filter file %d\n", __func__, pos.nFile);
206 : : return 0;
207 : : }
208 [ # # # # ]: 0 : if (!last_file.Commit()) {
209 [ # # ]: 0 : LogPrintf("%s: Failed to commit filter file %d\n", __func__, pos.nFile);
210 : : return 0;
211 : : }
212 : :
213 : 0 : pos.nFile++;
214 : 0 : pos.nPos = 0;
215 : 0 : }
216 : :
217 : : // Pre-allocate sufficient space for filter data.
218 : 0 : bool out_of_space;
219 : 0 : m_filter_fileseq->Allocate(pos, data_size, out_of_space);
220 [ # # ]: 0 : if (out_of_space) {
221 : 0 : LogPrintf("%s: out of disk space\n", __func__);
222 : 0 : return 0;
223 : : }
224 : :
225 [ # # ]: 0 : AutoFile fileout{m_filter_fileseq->Open(pos)};
226 [ # # ]: 0 : if (fileout.IsNull()) {
227 [ # # ]: 0 : LogPrintf("%s: Failed to open filter file %d\n", __func__, pos.nFile);
228 : : return 0;
229 : : }
230 : :
231 [ # # # # ]: 0 : fileout << filter.GetBlockHash() << filter.GetEncodedFilter();
232 : : return data_size;
233 : 0 : }
234 : :
235 : 0 : std::optional<uint256> BlockFilterIndex::ReadFilterHeader(int height, const uint256& expected_block_hash)
236 : : {
237 : 0 : std::pair<uint256, DBVal> read_out;
238 [ # # ]: 0 : if (!m_db->Read(DBHeightKey(height), read_out)) {
239 : 0 : return std::nullopt;
240 : : }
241 : :
242 [ # # ]: 0 : if (read_out.first != expected_block_hash) {
243 [ # # # # ]: 0 : LogError("%s: previous block header belongs to unexpected block %s; expected %s\n",
244 : : __func__, read_out.first.ToString(), expected_block_hash.ToString());
245 : 0 : return std::nullopt;
246 : : }
247 : :
248 : 0 : return read_out.second.header;
249 : : }
250 : :
251 : 0 : bool BlockFilterIndex::CustomAppend(const interfaces::BlockInfo& block)
252 : : {
253 : 0 : CBlockUndo block_undo;
254 : :
255 [ # # ]: 0 : if (block.height > 0) {
256 : : // pindex variable gives indexing code access to node internals. It
257 : : // will be removed in upcoming commit
258 [ # # # # : 0 : const CBlockIndex* pindex = WITH_LOCK(cs_main, return m_chainstate->m_blockman.LookupBlockIndex(block.hash));
# # ]
259 [ # # # # ]: 0 : if (!m_chainstate->m_blockman.ReadBlockUndo(block_undo, *pindex)) {
260 : : return false;
261 : : }
262 : : }
263 : :
264 [ # # # # ]: 0 : BlockFilter filter(m_filter_type, *Assert(block.data), block_undo);
265 : :
266 [ # # ]: 0 : const uint256& header = filter.ComputeHeader(m_last_header);
267 [ # # ]: 0 : bool res = Write(filter, block.height, header);
268 [ # # ]: 0 : if (res) m_last_header = header; // update last header
269 : 0 : return res;
270 : 0 : }
271 : :
272 : 0 : bool BlockFilterIndex::Write(const BlockFilter& filter, uint32_t block_height, const uint256& filter_header)
273 : : {
274 : 0 : size_t bytes_written = WriteFilterToDisk(m_next_filter_pos, filter);
275 [ # # ]: 0 : if (bytes_written == 0) return false;
276 : :
277 : 0 : std::pair<uint256, DBVal> value;
278 : 0 : value.first = filter.GetBlockHash();
279 : 0 : value.second.hash = filter.GetHash();
280 : 0 : value.second.header = filter_header;
281 : 0 : value.second.pos = m_next_filter_pos;
282 : :
283 [ # # ]: 0 : if (!m_db->Write(DBHeightKey(block_height), value)) {
284 : : return false;
285 : : }
286 : :
287 : 0 : m_next_filter_pos.nPos += bytes_written;
288 : 0 : return true;
289 : : }
290 : :
291 : 0 : [[nodiscard]] static bool CopyHeightIndexToHashIndex(CDBIterator& db_it, CDBBatch& batch,
292 : : const std::string& index_name,
293 : : int start_height, int stop_height)
294 : : {
295 : 0 : DBHeightKey key(start_height);
296 : 0 : db_it.Seek(key);
297 : :
298 [ # # ]: 0 : for (int height = start_height; height <= stop_height; ++height) {
299 [ # # # # ]: 0 : if (!db_it.GetKey(key) || key.height != height) {
300 : 0 : LogError("%s: unexpected key in %s: expected (%c, %d)\n",
301 : : __func__, index_name, DB_BLOCK_HEIGHT, height);
302 : 0 : return false;
303 : : }
304 : :
305 : 0 : std::pair<uint256, DBVal> value;
306 [ # # ]: 0 : if (!db_it.GetValue(value)) {
307 : 0 : LogError("%s: unable to read value in %s at key (%c, %d)\n",
308 : : __func__, index_name, DB_BLOCK_HEIGHT, height);
309 : 0 : return false;
310 : : }
311 : :
312 : 0 : batch.Write(DBHashKey(value.first), std::move(value.second));
313 : :
314 : 0 : db_it.Next();
315 : : }
316 : : return true;
317 : : }
318 : :
319 : 0 : bool BlockFilterIndex::CustomRewind(const interfaces::BlockRef& current_tip, const interfaces::BlockRef& new_tip)
320 : : {
321 : 0 : CDBBatch batch(*m_db);
322 [ # # # # ]: 0 : std::unique_ptr<CDBIterator> db_it(m_db->NewIterator());
323 : :
324 : : // During a reorg, we need to copy all filters for blocks that are getting disconnected from the
325 : : // height index to the hash index so we can still find them when the height index entries are
326 : : // overwritten.
327 [ # # # # ]: 0 : if (!CopyHeightIndexToHashIndex(*db_it, batch, m_name, new_tip.height, current_tip.height)) {
328 : : return false;
329 : : }
330 : :
331 : : // The latest filter position gets written in Commit by the call to the BaseIndex::Rewind.
332 : : // But since this creates new references to the filter, the position should get updated here
333 : : // atomically as well in case Commit fails.
334 [ # # ]: 0 : batch.Write(DB_FILTER_POS, m_next_filter_pos);
335 [ # # # # ]: 0 : if (!m_db->WriteBatch(batch)) return false;
336 : :
337 : : // Update cached header
338 [ # # # # ]: 0 : m_last_header = *Assert(ReadFilterHeader(new_tip.height, new_tip.hash));
339 : 0 : return true;
340 : 0 : }
341 : :
342 : 0 : static bool LookupOne(const CDBWrapper& db, const CBlockIndex* block_index, DBVal& result)
343 : : {
344 : : // First check if the result is stored under the height index and the value there matches the
345 : : // block hash. This should be the case if the block is on the active chain.
346 : 0 : std::pair<uint256, DBVal> read_out;
347 [ # # ]: 0 : if (!db.Read(DBHeightKey(block_index->nHeight), read_out)) {
348 : : return false;
349 : : }
350 [ # # ]: 0 : if (read_out.first == block_index->GetBlockHash()) {
351 : 0 : result = std::move(read_out.second);
352 : 0 : return true;
353 : : }
354 : :
355 : : // If value at the height index corresponds to an different block, the result will be stored in
356 : : // the hash index.
357 : 0 : return db.Read(DBHashKey(block_index->GetBlockHash()), result);
358 : : }
359 : :
360 : 0 : static bool LookupRange(CDBWrapper& db, const std::string& index_name, int start_height,
361 : : const CBlockIndex* stop_index, std::vector<DBVal>& results)
362 : : {
363 [ # # ]: 0 : if (start_height < 0) {
364 : 0 : LogError("%s: start height (%d) is negative\n", __func__, start_height);
365 : 0 : return false;
366 : : }
367 [ # # ]: 0 : if (start_height > stop_index->nHeight) {
368 : 0 : LogError("%s: start height (%d) is greater than stop height (%d)\n",
369 : : __func__, start_height, stop_index->nHeight);
370 : 0 : return false;
371 : : }
372 : :
373 : 0 : size_t results_size = static_cast<size_t>(stop_index->nHeight - start_height + 1);
374 : 0 : std::vector<std::pair<uint256, DBVal>> values(results_size);
375 : :
376 : 0 : DBHeightKey key(start_height);
377 [ # # # # ]: 0 : std::unique_ptr<CDBIterator> db_it(db.NewIterator());
378 [ # # ]: 0 : db_it->Seek(DBHeightKey(start_height));
379 [ # # ]: 0 : for (int height = start_height; height <= stop_index->nHeight; ++height) {
380 [ # # # # : 0 : if (!db_it->Valid() || !db_it->GetKey(key) || key.height != height) {
# # # # #
# ]
381 : 0 : return false;
382 : : }
383 : :
384 : 0 : size_t i = static_cast<size_t>(height - start_height);
385 [ # # # # ]: 0 : if (!db_it->GetValue(values[i])) {
386 [ # # ]: 0 : LogError("%s: unable to read value in %s at key (%c, %d)\n",
387 : : __func__, index_name, DB_BLOCK_HEIGHT, height);
388 : : return false;
389 : : }
390 : :
391 [ # # ]: 0 : db_it->Next();
392 : : }
393 : :
394 [ # # ]: 0 : results.resize(results_size);
395 : :
396 : : // Iterate backwards through block indexes collecting results in order to access the block hash
397 : : // of each entry in case we need to look it up in the hash index.
398 : 0 : for (const CBlockIndex* block_index = stop_index;
399 [ # # # # ]: 0 : block_index && block_index->nHeight >= start_height;
400 : 0 : block_index = block_index->pprev) {
401 : 0 : uint256 block_hash = block_index->GetBlockHash();
402 : :
403 : 0 : size_t i = static_cast<size_t>(block_index->nHeight - start_height);
404 [ # # ]: 0 : if (block_hash == values[i].first) {
405 : 0 : results[i] = std::move(values[i].second);
406 : 0 : continue;
407 : : }
408 : :
409 [ # # # # ]: 0 : if (!db.Read(DBHashKey(block_hash), results[i])) {
410 [ # # # # ]: 0 : LogError("%s: unable to read value in %s at key (%c, %s)\n",
411 : : __func__, index_name, DB_BLOCK_HASH, block_hash.ToString());
412 : 0 : return false;
413 : : }
414 : : }
415 : :
416 : : return true;
417 : 0 : }
418 : :
419 : 0 : bool BlockFilterIndex::LookupFilter(const CBlockIndex* block_index, BlockFilter& filter_out) const
420 : : {
421 : 0 : DBVal entry;
422 [ # # ]: 0 : if (!LookupOne(*m_db, block_index, entry)) {
423 : : return false;
424 : : }
425 : :
426 : 0 : return ReadFilterFromDisk(entry.pos, entry.hash, filter_out);
427 : : }
428 : :
429 : 0 : bool BlockFilterIndex::LookupFilterHeader(const CBlockIndex* block_index, uint256& header_out)
430 : : {
431 : 0 : LOCK(m_cs_headers_cache);
432 : :
433 : 0 : bool is_checkpoint{block_index->nHeight % CFCHECKPT_INTERVAL == 0};
434 : :
435 [ # # ]: 0 : if (is_checkpoint) {
436 : : // Try to find the block in the headers cache if this is a checkpoint height.
437 : 0 : auto header = m_headers_cache.find(block_index->GetBlockHash());
438 [ # # ]: 0 : if (header != m_headers_cache.end()) {
439 : 0 : header_out = header->second;
440 : 0 : return true;
441 : : }
442 : : }
443 : :
444 : 0 : DBVal entry;
445 [ # # # # ]: 0 : if (!LookupOne(*m_db, block_index, entry)) {
446 : : return false;
447 : : }
448 : :
449 [ # # # # ]: 0 : if (is_checkpoint &&
450 [ # # ]: 0 : m_headers_cache.size() < CF_HEADERS_CACHE_MAX_SZ) {
451 : : // Add to the headers cache if this is a checkpoint height.
452 [ # # ]: 0 : m_headers_cache.emplace(block_index->GetBlockHash(), entry.header);
453 : : }
454 : :
455 : 0 : header_out = entry.header;
456 : 0 : return true;
457 : 0 : }
458 : :
459 : 0 : bool BlockFilterIndex::LookupFilterRange(int start_height, const CBlockIndex* stop_index,
460 : : std::vector<BlockFilter>& filters_out) const
461 : : {
462 : 0 : std::vector<DBVal> entries;
463 [ # # # # ]: 0 : if (!LookupRange(*m_db, m_name, start_height, stop_index, entries)) {
464 : : return false;
465 : : }
466 : :
467 [ # # ]: 0 : filters_out.resize(entries.size());
468 : 0 : auto filter_pos_it = filters_out.begin();
469 [ # # ]: 0 : for (const auto& entry : entries) {
470 [ # # # # ]: 0 : if (!ReadFilterFromDisk(entry.pos, entry.hash, *filter_pos_it)) {
471 : : return false;
472 : : }
473 : 0 : ++filter_pos_it;
474 : : }
475 : :
476 : : return true;
477 : 0 : }
478 : :
479 : 0 : bool BlockFilterIndex::LookupFilterHashRange(int start_height, const CBlockIndex* stop_index,
480 : : std::vector<uint256>& hashes_out) const
481 : :
482 : : {
483 : 0 : std::vector<DBVal> entries;
484 [ # # # # ]: 0 : if (!LookupRange(*m_db, m_name, start_height, stop_index, entries)) {
485 : : return false;
486 : : }
487 : :
488 [ # # ]: 0 : hashes_out.clear();
489 [ # # ]: 0 : hashes_out.reserve(entries.size());
490 [ # # ]: 0 : for (const auto& entry : entries) {
491 [ # # ]: 0 : hashes_out.push_back(entry.hash);
492 : : }
493 : : return true;
494 : 0 : }
495 : :
496 : 2 : BlockFilterIndex* GetBlockFilterIndex(BlockFilterType filter_type)
497 : : {
498 : 2 : auto it = g_filter_indexes.find(filter_type);
499 [ - + ]: 2 : return it != g_filter_indexes.end() ? &it->second : nullptr;
500 : : }
501 : :
502 : 7 : void ForEachBlockFilterIndex(std::function<void (BlockFilterIndex&)> fn)
503 : : {
504 [ - + ]: 7 : for (auto& entry : g_filter_indexes) fn(entry.second);
505 : 7 : }
506 : :
507 : 0 : bool InitBlockFilterIndex(std::function<std::unique_ptr<interfaces::Chain>()> make_chain, BlockFilterType filter_type,
508 : : size_t n_cache_size, bool f_memory, bool f_wipe)
509 : : {
510 : 0 : auto result = g_filter_indexes.emplace(std::piecewise_construct,
511 [ # # ]: 0 : std::forward_as_tuple(filter_type),
512 [ # # ]: 0 : std::forward_as_tuple(make_chain(), filter_type,
513 : : n_cache_size, f_memory, f_wipe));
514 : 0 : return result.second;
515 : : }
516 : :
517 : 0 : bool DestroyBlockFilterIndex(BlockFilterType filter_type)
518 : : {
519 : 0 : return g_filter_indexes.erase(filter_type);
520 : : }
521 : :
522 : 0 : void DestroyAllBlockFilterIndexes()
523 : : {
524 : 0 : g_filter_indexes.clear();
525 : 0 : }
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