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1 : : // Copyright (c) 2009-2010 Satoshi Nakamoto
2 : : // Copyright (c) 2009-2022 The Bitcoin Core developers
3 : : // Distributed under the MIT software license, see the accompanying
4 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 : :
6 : : #include <txmempool.h>
7 : :
8 : : #include <chain.h>
9 : : #include <coins.h>
10 : : #include <common/system.h>
11 : : #include <consensus/consensus.h>
12 : : #include <consensus/tx_verify.h>
13 : : #include <consensus/validation.h>
14 : : #include <logging.h>
15 : : #include <policy/fees.h>
16 : : #include <policy/policy.h>
17 [ + - ]: 2 : #include <policy/settings.h>
18 [ + - ]: 2 : #include <reverse_iterator.h>
19 : : #include <util/check.h>
20 : : #include <util/moneystr.h>
21 : : #include <util/overflow.h>
22 : : #include <util/result.h>
23 : : #include <util/time.h>
24 : : #include <util/trace.h>
25 : : #include <util/translation.h>
26 : : #include <validationinterface.h>
27 : :
28 : : #include <cmath>
29 : : #include <numeric>
30 : : #include <optional>
31 : : #include <string_view>
32 : : #include <utility>
33 : :
34 : 0 : bool TestLockPointValidity(CChain& active_chain, const LockPoints& lp)
35 : : {
36 : 0 : AssertLockHeld(cs_main);
37 : : // If there are relative lock times then the maxInputBlock will be set
38 : : // If there are no relative lock times, the LockPoints don't depend on the chain
39 [ # # ]: 0 : if (lp.maxInputBlock) {
40 : : // Check whether active_chain is an extension of the block at which the LockPoints
41 : : // calculation was valid. If not LockPoints are no longer valid
42 [ # # ]: 0 : if (!active_chain.Contains(lp.maxInputBlock)) {
43 : 0 : return false;
44 : : }
45 : 0 : }
46 : :
47 : : // LockPoints still valid
48 : 0 : return true;
49 : 0 : }
50 : :
51 : 0 : void CTxMemPool::UpdateForDescendants(txiter updateIt, cacheMap& cachedDescendants,
52 : : const std::set<uint256>& setExclude, std::set<uint256>& descendants_to_remove)
53 : : {
54 : 0 : CTxMemPoolEntry::Children stageEntries, descendants;
55 [ # # ][ # # ]: 0 : stageEntries = updateIt->GetMemPoolChildrenConst();
[ # # ]
56 : :
57 [ # # ]: 0 : while (!stageEntries.empty()) {
58 : 0 : const CTxMemPoolEntry& descendant = *stageEntries.begin();
59 [ # # ]: 0 : descendants.insert(descendant);
60 [ # # ]: 0 : stageEntries.erase(descendant);
61 [ # # ]: 0 : const CTxMemPoolEntry::Children& children = descendant.GetMemPoolChildrenConst();
62 [ # # ]: 0 : for (const CTxMemPoolEntry& childEntry : children) {
63 [ # # ][ # # ]: 0 : cacheMap::iterator cacheIt = cachedDescendants.find(mapTx.iterator_to(childEntry));
64 [ # # ]: 0 : if (cacheIt != cachedDescendants.end()) {
65 : : // We've already calculated this one, just add the entries for this set
66 : : // but don't traverse again.
67 [ # # ]: 0 : for (txiter cacheEntry : cacheIt->second) {
68 [ # # ][ # # ]: 0 : descendants.insert(*cacheEntry);
69 : : }
70 [ # # ][ # # ]: 0 : } else if (!descendants.count(childEntry)) {
71 : : // Schedule for later processing
72 [ # # ]: 0 : stageEntries.insert(childEntry);
73 : 0 : }
74 : : }
75 : : }
76 : : // descendants now contains all in-mempool descendants of updateIt.
77 : : // Update and add to cached descendant map
78 : 0 : int32_t modifySize = 0;
79 : 0 : CAmount modifyFee = 0;
80 : 0 : int64_t modifyCount = 0;
81 [ # # ]: 0 : for (const CTxMemPoolEntry& descendant : descendants) {
82 [ # # ][ # # ]: 0 : if (!setExclude.count(descendant.GetTx().GetHash())) {
[ # # ][ # # ]
83 [ # # ]: 0 : modifySize += descendant.GetTxSize();
84 [ # # ]: 0 : modifyFee += descendant.GetModifiedFee();
85 : 0 : modifyCount++;
86 [ # # ][ # # ]: 0 : cachedDescendants[updateIt].insert(mapTx.iterator_to(descendant));
[ # # ]
87 : : // Update ancestor state for each descendant
88 [ # # ][ # # ]: 0 : mapTx.modify(mapTx.iterator_to(descendant), [=](CTxMemPoolEntry& e) {
89 : 0 : e.UpdateAncestorState(updateIt->GetTxSize(), updateIt->GetModifiedFee(), 1, updateIt->GetSigOpCost());
90 : 0 : });
91 : : // Don't directly remove the transaction here -- doing so would
92 : : // invalidate iterators in cachedDescendants. Mark it for removal
93 : : // by inserting into descendants_to_remove.
94 [ # # ][ # # ]: 0 : if (descendant.GetCountWithAncestors() > uint64_t(m_limits.ancestor_count) || descendant.GetSizeWithAncestors() > m_limits.ancestor_size_vbytes) {
[ # # ][ # # ]
95 [ # # ][ # # ]: 0 : descendants_to_remove.insert(descendant.GetTx().GetHash());
[ # # ]
96 : 0 : }
97 : 0 : }
98 : : }
99 [ # # ]: 0 : mapTx.modify(updateIt, [=](CTxMemPoolEntry& e) { e.UpdateDescendantState(modifySize, modifyFee, modifyCount); });
100 : 0 : }
101 : :
102 : 0 : void CTxMemPool::UpdateTransactionsFromBlock(const std::vector<uint256>& vHashesToUpdate)
103 : : {
104 : 0 : AssertLockHeld(cs);
105 : : // For each entry in vHashesToUpdate, store the set of in-mempool, but not
106 : : // in-vHashesToUpdate transactions, so that we don't have to recalculate
107 : : // descendants when we come across a previously seen entry.
108 : 0 : cacheMap mapMemPoolDescendantsToUpdate;
109 : :
110 : : // Use a set for lookups into vHashesToUpdate (these entries are already
111 : : // accounted for in the state of their ancestors)
112 [ # # ]: 0 : std::set<uint256> setAlreadyIncluded(vHashesToUpdate.begin(), vHashesToUpdate.end());
113 : :
114 : 0 : std::set<uint256> descendants_to_remove;
115 : :
116 : : // Iterate in reverse, so that whenever we are looking at a transaction
117 : : // we are sure that all in-mempool descendants have already been processed.
118 : : // This maximizes the benefit of the descendant cache and guarantees that
119 : : // CTxMemPoolEntry::m_children will be updated, an assumption made in
120 : : // UpdateForDescendants.
121 [ # # ][ # # ]: 0 : for (const uint256 &hash : reverse_iterate(vHashesToUpdate)) {
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
122 : : // calculate children from mapNextTx
123 [ # # ]: 0 : txiter it = mapTx.find(hash);
124 [ # # ][ # # ]: 0 : if (it == mapTx.end()) {
125 : 0 : continue;
126 : : }
127 [ # # ][ # # ]: 0 : auto iter = mapNextTx.lower_bound(COutPoint(hash, 0));
128 : : // First calculate the children, and update CTxMemPoolEntry::m_children to
129 : : // include them, and update their CTxMemPoolEntry::m_parents to include this tx.
130 : : // we cache the in-mempool children to avoid duplicate updates
131 : : {
132 [ # # ]: 0 : WITH_FRESH_EPOCH(m_epoch);
133 [ # # ][ # # ]: 0 : for (; iter != mapNextTx.end() && iter->first->hash == hash; ++iter) {
[ # # ][ # # ]
134 [ # # ]: 0 : const uint256 &childHash = iter->second->GetHash();
135 [ # # ]: 0 : txiter childIter = mapTx.find(childHash);
136 [ # # ][ # # ]: 0 : assert(childIter != mapTx.end());
137 : : // We can skip updating entries we've encountered before or that
138 : : // are in the block (which are already accounted for).
139 [ # # ][ # # ]: 0 : if (!visited(childIter) && !setAlreadyIncluded.count(childHash)) {
[ # # ][ # # ]
140 [ # # ]: 0 : UpdateChild(it, childIter, true);
141 [ # # ]: 0 : UpdateParent(childIter, it, true);
142 : 0 : }
143 : 0 : }
144 : 0 : } // release epoch guard for UpdateForDescendants
145 [ # # ]: 0 : UpdateForDescendants(it, mapMemPoolDescendantsToUpdate, setAlreadyIncluded, descendants_to_remove);
146 : : }
147 : :
148 [ # # ]: 0 : for (const auto& txid : descendants_to_remove) {
149 : : // This txid may have been removed already in a prior call to removeRecursive.
150 : : // Therefore we ensure it is not yet removed already.
151 [ # # ][ # # ]: 0 : if (const std::optional<txiter> txiter = GetIter(txid)) {
152 [ # # ][ # # ]: 0 : removeRecursive((*txiter)->GetTx(), MemPoolRemovalReason::SIZELIMIT);
[ # # ]
153 : 0 : }
154 : : }
155 : 0 : }
156 : :
157 : 0 : util::Result<CTxMemPool::setEntries> CTxMemPool::CalculateAncestorsAndCheckLimits(
158 : : int64_t entry_size,
159 : : size_t entry_count,
160 : : CTxMemPoolEntry::Parents& staged_ancestors,
161 : : const Limits& limits) const
162 : : {
163 : 0 : int64_t totalSizeWithAncestors = entry_size;
164 : 0 : setEntries ancestors;
165 : :
166 [ # # ]: 0 : while (!staged_ancestors.empty()) {
167 : 0 : const CTxMemPoolEntry& stage = staged_ancestors.begin()->get();
168 [ # # ]: 0 : txiter stageit = mapTx.iterator_to(stage);
169 : :
170 [ # # ]: 0 : ancestors.insert(stageit);
171 [ # # ]: 0 : staged_ancestors.erase(stage);
172 [ # # ][ # # ]: 0 : totalSizeWithAncestors += stageit->GetTxSize();
173 : :
174 [ # # ][ # # ]: 0 : if (stageit->GetSizeWithDescendants() + entry_size > limits.descendant_size_vbytes) {
[ # # ]
175 [ # # ][ # # ]: 0 : return util::Error{Untranslated(strprintf("exceeds descendant size limit for tx %s [limit: %u]", stageit->GetTx().GetHash().ToString(), limits.descendant_size_vbytes))};
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
176 [ # # ][ # # ]: 0 : } else if (stageit->GetCountWithDescendants() + entry_count > static_cast<uint64_t>(limits.descendant_count)) {
[ # # ]
177 [ # # ][ # # ]: 0 : return util::Error{Untranslated(strprintf("too many descendants for tx %s [limit: %u]", stageit->GetTx().GetHash().ToString(), limits.descendant_count))};
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
178 [ # # ]: 0 : } else if (totalSizeWithAncestors > limits.ancestor_size_vbytes) {
179 [ # # ][ # # ]: 0 : return util::Error{Untranslated(strprintf("exceeds ancestor size limit [limit: %u]", limits.ancestor_size_vbytes))};
[ # # ]
180 : : }
181 : :
182 [ # # ][ # # ]: 0 : const CTxMemPoolEntry::Parents& parents = stageit->GetMemPoolParentsConst();
183 [ # # ]: 0 : for (const CTxMemPoolEntry& parent : parents) {
184 [ # # ]: 0 : txiter parent_it = mapTx.iterator_to(parent);
185 : :
186 : : // If this is a new ancestor, add it.
187 [ # # ][ # # ]: 0 : if (ancestors.count(parent_it) == 0) {
188 [ # # ]: 0 : staged_ancestors.insert(parent);
189 : 0 : }
190 [ # # ]: 0 : if (staged_ancestors.size() + ancestors.size() + entry_count > static_cast<uint64_t>(limits.ancestor_count)) {
191 [ # # ][ # # ]: 0 : return util::Error{Untranslated(strprintf("too many unconfirmed ancestors [limit: %u]", limits.ancestor_count))};
[ # # ]
192 : : }
193 : : }
194 : : }
195 : :
196 [ # # ]: 0 : return ancestors;
197 : 0 : }
198 : :
199 : 0 : bool CTxMemPool::CheckPackageLimits(const Package& package,
200 : : const int64_t total_vsize,
201 : : std::string &errString) const
202 : : {
203 : 0 : size_t pack_count = package.size();
204 : :
205 : : // Package itself is busting mempool limits; should be rejected even if no staged_ancestors exist
206 [ # # ]: 0 : if (pack_count > static_cast<uint64_t>(m_limits.ancestor_count)) {
207 : 0 : errString = strprintf("package count %u exceeds ancestor count limit [limit: %u]", pack_count, m_limits.ancestor_count);
208 : 0 : return false;
209 [ # # ]: 0 : } else if (pack_count > static_cast<uint64_t>(m_limits.descendant_count)) {
210 : 0 : errString = strprintf("package count %u exceeds descendant count limit [limit: %u]", pack_count, m_limits.descendant_count);
211 : 0 : return false;
212 [ # # ]: 0 : } else if (total_vsize > m_limits.ancestor_size_vbytes) {
213 : 0 : errString = strprintf("package size %u exceeds ancestor size limit [limit: %u]", total_vsize, m_limits.ancestor_size_vbytes);
214 : 0 : return false;
215 [ # # ]: 0 : } else if (total_vsize > m_limits.descendant_size_vbytes) {
216 : 0 : errString = strprintf("package size %u exceeds descendant size limit [limit: %u]", total_vsize, m_limits.descendant_size_vbytes);
217 : 0 : return false;
218 : : }
219 : :
220 : 0 : CTxMemPoolEntry::Parents staged_ancestors;
221 [ # # ]: 0 : for (const auto& tx : package) {
222 [ # # ]: 0 : for (const auto& input : tx->vin) {
223 [ # # ]: 0 : std::optional<txiter> piter = GetIter(input.prevout.hash);
224 [ # # ]: 0 : if (piter) {
225 [ # # ][ # # ]: 0 : staged_ancestors.insert(**piter);
226 [ # # ]: 0 : if (staged_ancestors.size() + package.size() > static_cast<uint64_t>(m_limits.ancestor_count)) {
227 [ # # ]: 0 : errString = strprintf("too many unconfirmed parents [limit: %u]", m_limits.ancestor_count);
228 : 0 : return false;
229 : : }
230 : 0 : }
231 : : }
232 : : }
233 : : // When multiple transactions are passed in, the ancestors and descendants of all transactions
234 : : // considered together must be within limits even if they are not interdependent. This may be
235 : : // stricter than the limits for each individual transaction.
236 [ # # ][ # # ]: 0 : const auto ancestors{CalculateAncestorsAndCheckLimits(total_vsize, package.size(),
237 : 0 : staged_ancestors, m_limits)};
238 : : // It's possible to overestimate the ancestor/descendant totals.
239 [ # # ][ # # ]: 0 : if (!ancestors.has_value()) errString = "possibly " + util::ErrorString(ancestors).original;
[ # # ]
240 : 0 : return ancestors.has_value();
241 : 0 : }
242 : :
243 : 0 : util::Result<CTxMemPool::setEntries> CTxMemPool::CalculateMemPoolAncestors(
244 : : const CTxMemPoolEntry &entry,
245 : : const Limits& limits,
246 : : bool fSearchForParents /* = true */) const
247 : : {
248 : 0 : CTxMemPoolEntry::Parents staged_ancestors;
249 [ # # ]: 0 : const CTransaction &tx = entry.GetTx();
250 : :
251 [ # # ]: 0 : if (fSearchForParents) {
252 : : // Get parents of this transaction that are in the mempool
253 : : // GetMemPoolParents() is only valid for entries in the mempool, so we
254 : : // iterate mapTx to find parents.
255 [ # # ]: 0 : for (unsigned int i = 0; i < tx.vin.size(); i++) {
256 [ # # ]: 0 : std::optional<txiter> piter = GetIter(tx.vin[i].prevout.hash);
257 [ # # ]: 0 : if (piter) {
258 [ # # ][ # # ]: 0 : staged_ancestors.insert(**piter);
259 [ # # ]: 0 : if (staged_ancestors.size() + 1 > static_cast<uint64_t>(limits.ancestor_count)) {
260 [ # # ][ # # ]: 0 : return util::Error{Untranslated(strprintf("too many unconfirmed parents [limit: %u]", limits.ancestor_count))};
[ # # ]
261 : : }
262 : 0 : }
263 : 0 : }
264 : 0 : } else {
265 : : // If we're not searching for parents, we require this to already be an
266 : : // entry in the mempool and use the entry's cached parents.
267 [ # # ]: 0 : txiter it = mapTx.iterator_to(entry);
268 [ # # ][ # # ]: 0 : staged_ancestors = it->GetMemPoolParentsConst();
[ # # ]
269 : : }
270 : :
271 [ # # ][ # # ]: 0 : return CalculateAncestorsAndCheckLimits(entry.GetTxSize(), /*entry_count=*/1, staged_ancestors,
[ # # ]
272 : 0 : limits);
273 : 0 : }
274 : :
275 : 0 : CTxMemPool::setEntries CTxMemPool::AssumeCalculateMemPoolAncestors(
276 : : std::string_view calling_fn_name,
277 : : const CTxMemPoolEntry &entry,
278 : : const Limits& limits,
279 : : bool fSearchForParents /* = true */) const
280 : : {
281 : 0 : auto result{CalculateMemPoolAncestors(entry, limits, fSearchForParents)};
282 [ # # ][ # # ]: 0 : if (!Assume(result)) {
283 [ # # ][ # # ]: 0 : LogPrintLevel(BCLog::MEMPOOL, BCLog::Level::Error, "%s: CalculateMemPoolAncestors failed unexpectedly, continuing with empty ancestor set (%s)\n",
[ # # ][ # # ]
[ # # ][ # # ]
284 : : calling_fn_name, util::ErrorString(result).original);
285 : 0 : }
286 [ # # ]: 0 : return std::move(result).value_or(CTxMemPool::setEntries{});
287 : 0 : }
288 : :
289 : 0 : void CTxMemPool::UpdateAncestorsOf(bool add, txiter it, setEntries &setAncestors)
290 : : {
291 : 0 : const CTxMemPoolEntry::Parents& parents = it->GetMemPoolParentsConst();
292 : : // add or remove this tx as a child of each parent
293 [ # # ]: 0 : for (const CTxMemPoolEntry& parent : parents) {
294 : 0 : UpdateChild(mapTx.iterator_to(parent), it, add);
295 : : }
296 : 0 : const int32_t updateCount = (add ? 1 : -1);
297 : 0 : const int32_t updateSize{updateCount * it->GetTxSize()};
298 : 0 : const CAmount updateFee = updateCount * it->GetModifiedFee();
299 [ # # ]: 0 : for (txiter ancestorIt : setAncestors) {
300 : 0 : mapTx.modify(ancestorIt, [=](CTxMemPoolEntry& e) { e.UpdateDescendantState(updateSize, updateFee, updateCount); });
301 : : }
302 : 0 : }
303 : :
304 : 0 : void CTxMemPool::UpdateEntryForAncestors(txiter it, const setEntries &setAncestors)
305 : 1 : {
306 : 0 : int64_t updateCount = setAncestors.size();
307 : 0 : int64_t updateSize = 0;
308 : 1 : CAmount updateFee = 0;
309 : 1 : int64_t updateSigOpsCost = 0;
310 [ # # ]: 1 : for (txiter ancestorIt : setAncestors) {
311 : 0 : updateSize += ancestorIt->GetTxSize();
312 : 1 : updateFee += ancestorIt->GetModifiedFee();
313 : 1 : updateSigOpsCost += ancestorIt->GetSigOpCost();
314 : 1 : }
315 : 1 : mapTx.modify(it, [=](CTxMemPoolEntry& e){ e.UpdateAncestorState(updateSize, updateFee, updateCount, updateSigOpsCost); });
316 : 0 : }
317 : :
318 : 0 : void CTxMemPool::UpdateChildrenForRemoval(txiter it)
319 : : {
320 : 1 : const CTxMemPoolEntry::Children& children = it->GetMemPoolChildrenConst();
321 [ # # ]: 0 : for (const CTxMemPoolEntry& updateIt : children) {
322 : 0 : UpdateParent(mapTx.iterator_to(updateIt), it, false);
323 : : }
324 : 1 : }
325 : :
326 : 0 : void CTxMemPool::UpdateForRemoveFromMempool(const setEntries &entriesToRemove, bool updateDescendants)
327 : : {
328 : : // For each entry, walk back all ancestors and decrement size associated with this
329 : : // transaction
330 [ # # ]: 0 : if (updateDescendants) {
331 : : // updateDescendants should be true whenever we're not recursively
332 : : // removing a tx and all its descendants, eg when a transaction is
333 : : // confirmed in a block.
334 : : // Here we only update statistics and not data in CTxMemPool::Parents
335 : : // and CTxMemPoolEntry::Children (which we need to preserve until we're
336 : : // finished with all operations that need to traverse the mempool).
337 [ # # ]: 0 : for (txiter removeIt : entriesToRemove) {
338 : 0 : setEntries setDescendants;
339 [ # # ]: 0 : CalculateDescendants(removeIt, setDescendants);
340 [ # # ]: 0 : setDescendants.erase(removeIt); // don't update state for self
341 [ # # ][ # # ]: 0 : int32_t modifySize = -removeIt->GetTxSize();
342 [ # # ][ # # ]: 0 : CAmount modifyFee = -removeIt->GetModifiedFee();
343 [ # # ][ # # ]: 0 : int modifySigOps = -removeIt->GetSigOpCost();
344 [ # # ]: 0 : for (txiter dit : setDescendants) {
345 [ # # ]: 0 : mapTx.modify(dit, [=](CTxMemPoolEntry& e){ e.UpdateAncestorState(modifySize, modifyFee, -1, modifySigOps); });
346 : : }
347 : 0 : }
348 : 0 : }
349 [ # # ]: 0 : for (txiter removeIt : entriesToRemove) {
350 : 0 : const CTxMemPoolEntry &entry = *removeIt;
351 : : // Since this is a tx that is already in the mempool, we can call CMPA
352 : : // with fSearchForParents = false. If the mempool is in a consistent
353 : : // state, then using true or false should both be correct, though false
354 : : // should be a bit faster.
355 : : // However, if we happen to be in the middle of processing a reorg, then
356 : : // the mempool can be in an inconsistent state. In this case, the set
357 : : // of ancestors reachable via GetMemPoolParents()/GetMemPoolChildren()
358 : : // will be the same as the set of ancestors whose packages include this
359 : : // transaction, because when we add a new transaction to the mempool in
360 : : // addUnchecked(), we assume it has no children, and in the case of a
361 : : // reorg where that assumption is false, the in-mempool children aren't
362 : : // linked to the in-block tx's until UpdateTransactionsFromBlock() is
363 : : // called.
364 : : // So if we're being called during a reorg, ie before
365 : : // UpdateTransactionsFromBlock() has been called, then
366 : : // GetMemPoolParents()/GetMemPoolChildren() will differ from the set of
367 : : // mempool parents we'd calculate by searching, and it's important that
368 : : // we use the cached notion of ancestor transactions as the set of
369 : : // things to update for removal.
370 : 0 : auto ancestors{AssumeCalculateMemPoolAncestors(__func__, entry, Limits::NoLimits(), /*fSearchForParents=*/false)};
371 : : // Note that UpdateAncestorsOf severs the child links that point to
372 : : // removeIt in the entries for the parents of removeIt.
373 [ # # ]: 0 : UpdateAncestorsOf(false, removeIt, ancestors);
374 : 0 : }
375 : : // After updating all the ancestor sizes, we can now sever the link between each
376 : : // transaction being removed and any mempool children (ie, update CTxMemPoolEntry::m_parents
377 : : // for each direct child of a transaction being removed).
378 [ # # ]: 0 : for (txiter removeIt : entriesToRemove) {
379 : 0 : UpdateChildrenForRemoval(removeIt);
380 : : }
381 : 0 : }
382 : :
383 : 0 : void CTxMemPoolEntry::UpdateDescendantState(int32_t modifySize, CAmount modifyFee, int64_t modifyCount)
384 : : {
385 : 0 : nSizeWithDescendants += modifySize;
386 [ # # ]: 0 : assert(nSizeWithDescendants > 0);
387 : 0 : nModFeesWithDescendants = SaturatingAdd(nModFeesWithDescendants, modifyFee);
388 : 0 : m_count_with_descendants += modifyCount;
389 [ # # ]: 0 : assert(m_count_with_descendants > 0);
390 : 0 : }
391 : :
392 : 0 : void CTxMemPoolEntry::UpdateAncestorState(int32_t modifySize, CAmount modifyFee, int64_t modifyCount, int64_t modifySigOps)
393 : : {
394 : 0 : nSizeWithAncestors += modifySize;
395 [ # # ]: 0 : assert(nSizeWithAncestors > 0);
396 : 0 : nModFeesWithAncestors = SaturatingAdd(nModFeesWithAncestors, modifyFee);
397 : 0 : m_count_with_ancestors += modifyCount;
398 [ # # ]: 0 : assert(m_count_with_ancestors > 0);
399 : 0 : nSigOpCostWithAncestors += modifySigOps;
400 [ # # ]: 0 : assert(int(nSigOpCostWithAncestors) >= 0);
401 : 0 : }
402 : :
403 [ + - ][ + - ]: 2 : CTxMemPool::CTxMemPool(const Options& opts)
404 : 1 : : m_check_ratio{opts.check_ratio},
405 : 1 : minerPolicyEstimator{opts.estimator},
406 : 1 : m_max_size_bytes{opts.max_size_bytes},
407 : 1 : m_expiry{opts.expiry},
408 : 1 : m_incremental_relay_feerate{opts.incremental_relay_feerate},
409 : 1 : m_min_relay_feerate{opts.min_relay_feerate},
410 : 1 : m_dust_relay_feerate{opts.dust_relay_feerate},
411 : 1 : m_permit_bare_multisig{opts.permit_bare_multisig},
412 : 1 : m_max_datacarrier_bytes{opts.max_datacarrier_bytes},
413 : 1 : m_require_standard{opts.require_standard},
414 : 1 : m_full_rbf{opts.full_rbf},
415 : 1 : m_limits{opts.limits}
416 : : {
417 : 1 : }
418 : :
419 : 0 : bool CTxMemPool::isSpent(const COutPoint& outpoint) const
420 : : {
421 : 0 : LOCK(cs);
422 [ # # ]: 0 : return mapNextTx.count(outpoint);
423 : 0 : }
424 : :
425 : 0 : unsigned int CTxMemPool::GetTransactionsUpdated() const
426 : : {
427 : 0 : return nTransactionsUpdated;
428 : : }
429 : :
430 : 201 : void CTxMemPool::AddTransactionsUpdated(unsigned int n)
431 : : {
432 : 201 : nTransactionsUpdated += n;
433 : 201 : }
434 : :
435 : 0 : void CTxMemPool::addUnchecked(const CTxMemPoolEntry &entry, setEntries &setAncestors, bool validFeeEstimate)
436 : : {
437 : : // Add to memory pool without checking anything.
438 : : // Used by AcceptToMemoryPool(), which DOES do
439 : : // all the appropriate checks.
440 : 0 : indexed_transaction_set::iterator newit = mapTx.insert(entry).first;
441 : :
442 : : // Update transaction for any feeDelta created by PrioritiseTransaction
443 : 0 : CAmount delta{0};
444 : 0 : ApplyDelta(entry.GetTx().GetHash(), delta);
445 : : // The following call to UpdateModifiedFee assumes no previous fee modifications
446 : 0 : Assume(entry.GetFee() == entry.GetModifiedFee());
447 [ # # ]: 0 : if (delta) {
448 : 0 : mapTx.modify(newit, [&delta](CTxMemPoolEntry& e) { e.UpdateModifiedFee(delta); });
449 : 0 : }
450 : :
451 : : // Update cachedInnerUsage to include contained transaction's usage.
452 : : // (When we update the entry for in-mempool parents, memory usage will be
453 : : // further updated.)
454 : 0 : cachedInnerUsage += entry.DynamicMemoryUsage();
455 : :
456 : 0 : const CTransaction& tx = newit->GetTx();
457 : 0 : std::set<uint256> setParentTransactions;
458 [ # # ]: 0 : for (unsigned int i = 0; i < tx.vin.size(); i++) {
459 [ # # ][ # # ]: 0 : mapNextTx.insert(std::make_pair(&tx.vin[i].prevout, &tx));
[ # # ]
460 [ # # ]: 0 : setParentTransactions.insert(tx.vin[i].prevout.hash);
461 : 0 : }
462 : : // Don't bother worrying about child transactions of this one.
463 : : // Normal case of a new transaction arriving is that there can't be any
464 : : // children, because such children would be orphans.
465 : : // An exception to that is if a transaction enters that used to be in a block.
466 : : // In that case, our disconnect block logic will call UpdateTransactionsFromBlock
467 : : // to clean up the mess we're leaving here.
468 : :
469 : : // Update ancestors with information about this tx
470 [ # # ][ # # ]: 0 : for (const auto& pit : GetIterSet(setParentTransactions)) {
471 [ # # ]: 0 : UpdateParent(newit, pit, true);
472 : : }
473 [ # # ]: 0 : UpdateAncestorsOf(true, newit, setAncestors);
474 [ # # ]: 0 : UpdateEntryForAncestors(newit, setAncestors);
475 : :
476 : 0 : nTransactionsUpdated++;
477 [ # # ]: 0 : totalTxSize += entry.GetTxSize();
478 [ # # ]: 0 : m_total_fee += entry.GetFee();
479 [ # # ]: 0 : if (minerPolicyEstimator) {
480 [ # # ]: 0 : minerPolicyEstimator->processTransaction(entry, validFeeEstimate);
481 : 0 : }
482 : :
483 [ # # ][ # # ]: 0 : vTxHashes.emplace_back(tx.GetWitnessHash(), newit);
484 [ # # ]: 0 : newit->vTxHashesIdx = vTxHashes.size() - 1;
485 : :
486 : : TRACE3(mempool, added,
487 : : entry.GetTx().GetHash().data(),
488 : : entry.GetTxSize(),
489 : : entry.GetFee()
490 : : );
491 : 0 : }
492 : :
493 : 0 : void CTxMemPool::removeUnchecked(txiter it, MemPoolRemovalReason reason)
494 : : {
495 : : // We increment mempool sequence value no matter removal reason
496 : : // even if not directly reported below.
497 : 0 : uint64_t mempool_sequence = GetAndIncrementSequence();
498 : :
499 [ # # ]: 0 : if (reason != MemPoolRemovalReason::BLOCK) {
500 : : // Notify clients that a transaction has been removed from the mempool
501 : : // for any reason except being included in a block. Clients interested
502 : : // in transactions included in blocks can subscribe to the BlockConnected
503 : : // notification.
504 [ # # ]: 0 : GetMainSignals().TransactionRemovedFromMempool(it->GetSharedTx(), reason, mempool_sequence);
505 : 0 : }
506 : : TRACE5(mempool, removed,
507 : : it->GetTx().GetHash().data(),
508 : : RemovalReasonToString(reason).c_str(),
509 : : it->GetTxSize(),
510 : : it->GetFee(),
511 : : std::chrono::duration_cast<std::chrono::duration<std::uint64_t>>(it->GetTime()).count()
512 : : );
513 : :
514 : 0 : const uint256 hash = it->GetTx().GetHash();
515 [ # # ]: 0 : for (const CTxIn& txin : it->GetTx().vin)
516 : 0 : mapNextTx.erase(txin.prevout);
517 : :
518 : 0 : RemoveUnbroadcastTx(hash, true /* add logging because unchecked */ );
519 : :
520 [ # # ]: 0 : if (vTxHashes.size() > 1) {
521 : 0 : vTxHashes[it->vTxHashesIdx] = std::move(vTxHashes.back());
522 : 0 : vTxHashes[it->vTxHashesIdx].second->vTxHashesIdx = it->vTxHashesIdx;
523 : 0 : vTxHashes.pop_back();
524 [ # # ]: 0 : if (vTxHashes.size() * 2 < vTxHashes.capacity())
525 : 0 : vTxHashes.shrink_to_fit();
526 : 0 : } else
527 : 0 : vTxHashes.clear();
528 : :
529 : 0 : totalTxSize -= it->GetTxSize();
530 : 0 : m_total_fee -= it->GetFee();
531 : 0 : cachedInnerUsage -= it->DynamicMemoryUsage();
532 : 0 : cachedInnerUsage -= memusage::DynamicUsage(it->GetMemPoolParentsConst()) + memusage::DynamicUsage(it->GetMemPoolChildrenConst());
533 : 0 : mapTx.erase(it);
534 : 0 : nTransactionsUpdated++;
535 [ # # ]: 0 : if (minerPolicyEstimator) {minerPolicyEstimator->removeTx(hash, false);}
536 : 0 : }
537 : :
538 : : // Calculates descendants of entry that are not already in setDescendants, and adds to
539 : : // setDescendants. Assumes entryit is already a tx in the mempool and CTxMemPoolEntry::m_children
540 : : // is correct for tx and all descendants.
541 : : // Also assumes that if an entry is in setDescendants already, then all
542 : : // in-mempool descendants of it are already in setDescendants as well, so that we
543 : : // can save time by not iterating over those entries.
544 : 0 : void CTxMemPool::CalculateDescendants(txiter entryit, setEntries& setDescendants) const
545 : : {
546 : 0 : setEntries stage;
547 [ # # ][ # # ]: 0 : if (setDescendants.count(entryit) == 0) {
548 [ # # ]: 0 : stage.insert(entryit);
549 : 0 : }
550 : : // Traverse down the children of entry, only adding children that are not
551 : : // accounted for in setDescendants already (because those children have either
552 : : // already been walked, or will be walked in this iteration).
553 [ # # ]: 0 : while (!stage.empty()) {
554 : 0 : txiter it = *stage.begin();
555 [ # # ]: 0 : setDescendants.insert(it);
556 [ # # ]: 0 : stage.erase(it);
557 : :
558 [ # # ][ # # ]: 0 : const CTxMemPoolEntry::Children& children = it->GetMemPoolChildrenConst();
559 [ # # ]: 0 : for (const CTxMemPoolEntry& child : children) {
560 [ # # ]: 0 : txiter childiter = mapTx.iterator_to(child);
561 [ # # ][ # # ]: 0 : if (!setDescendants.count(childiter)) {
562 [ # # ]: 0 : stage.insert(childiter);
563 : 0 : }
564 : : }
565 : : }
566 : 0 : }
567 : :
568 : 0 : void CTxMemPool::removeRecursive(const CTransaction &origTx, MemPoolRemovalReason reason)
569 : : {
570 : : // Remove transaction from memory pool
571 : 0 : AssertLockHeld(cs);
572 : 0 : setEntries txToRemove;
573 [ # # ][ # # ]: 0 : txiter origit = mapTx.find(origTx.GetHash());
574 [ # # ][ # # ]: 0 : if (origit != mapTx.end()) {
575 [ # # ]: 0 : txToRemove.insert(origit);
576 : 0 : } else {
577 : : // When recursively removing but origTx isn't in the mempool
578 : : // be sure to remove any children that are in the pool. This can
579 : : // happen during chain re-orgs if origTx isn't re-accepted into
580 : : // the mempool for any reason.
581 [ # # ]: 0 : for (unsigned int i = 0; i < origTx.vout.size(); i++) {
582 [ # # ][ # # ]: 0 : auto it = mapNextTx.find(COutPoint(origTx.GetHash(), i));
[ # # ]
583 [ # # ][ # # ]: 0 : if (it == mapNextTx.end())
584 : 0 : continue;
585 [ # # ][ # # ]: 0 : txiter nextit = mapTx.find(it->second->GetHash());
586 [ # # ][ # # ]: 0 : assert(nextit != mapTx.end());
587 [ # # ]: 0 : txToRemove.insert(nextit);
588 : 0 : }
589 : : }
590 : 0 : setEntries setAllRemoves;
591 [ # # ]: 0 : for (txiter it : txToRemove) {
592 [ # # ]: 0 : CalculateDescendants(it, setAllRemoves);
593 : : }
594 : :
595 [ # # ]: 0 : RemoveStaged(setAllRemoves, false, reason);
596 : 0 : }
597 : :
598 : 0 : void CTxMemPool::removeForReorg(CChain& chain, std::function<bool(txiter)> check_final_and_mature)
599 : : {
600 : : // Remove transactions spending a coinbase which are now immature and no-longer-final transactions
601 : 0 : AssertLockHeld(cs);
602 : 0 : AssertLockHeld(::cs_main);
603 : :
604 : 0 : setEntries txToRemove;
605 [ # # ][ # # ]: 0 : for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++) {
[ # # ]
606 [ # # ][ # # ]: 0 : if (check_final_and_mature(it)) txToRemove.insert(it);
[ # # ]
607 : 0 : }
608 : 0 : setEntries setAllRemoves;
609 [ # # ]: 0 : for (txiter it : txToRemove) {
610 [ # # ]: 0 : CalculateDescendants(it, setAllRemoves);
611 : : }
612 [ # # ]: 0 : RemoveStaged(setAllRemoves, false, MemPoolRemovalReason::REORG);
613 [ # # ][ # # ]: 0 : for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++) {
[ # # ]
614 [ # # ][ # # ]: 0 : assert(TestLockPointValidity(chain, it->GetLockPoints()));
[ # # ][ # # ]
615 : 0 : }
616 : 0 : }
617 : :
618 : 201 : void CTxMemPool::removeConflicts(const CTransaction &tx)
619 : : {
620 : : // Remove transactions which depend on inputs of tx, recursively
621 : 201 : AssertLockHeld(cs);
622 [ + + ]: 402 : for (const CTxIn &txin : tx.vin) {
623 : 201 : auto it = mapNextTx.find(txin.prevout);
624 [ + - ]: 201 : if (it != mapNextTx.end()) {
625 : 0 : const CTransaction &txConflict = *it->second;
626 [ # # ]: 0 : if (txConflict != tx)
627 : : {
628 : 0 : ClearPrioritisation(txConflict.GetHash());
629 : 0 : removeRecursive(txConflict, MemPoolRemovalReason::CONFLICT);
630 : 0 : }
631 : 0 : }
632 : : }
633 : 201 : }
634 : :
635 : : /**
636 : : * Called when a block is connected. Removes from mempool and updates the miner fee estimator.
637 : : */
638 : 201 : void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight)
639 : : {
640 : 201 : AssertLockHeld(cs);
641 : 201 : std::vector<const CTxMemPoolEntry*> entries;
642 [ + + ]: 402 : for (const auto& tx : vtx)
643 : : {
644 [ + - ]: 201 : uint256 hash = tx->GetHash();
645 : :
646 [ + - ]: 201 : indexed_transaction_set::iterator i = mapTx.find(hash);
647 [ + - ][ - + ]: 201 : if (i != mapTx.end())
648 [ # # ][ # # ]: 0 : entries.push_back(&*i);
649 : : }
650 : : // Before the txs in the new block have been removed from the mempool, update policy estimates
651 [ + - ][ + - ]: 201 : if (minerPolicyEstimator) {minerPolicyEstimator->processBlock(nBlockHeight, entries);}
652 [ + + ]: 402 : for (const auto& tx : vtx)
653 : : {
654 [ + - ][ + - ]: 201 : txiter it = mapTx.find(tx->GetHash());
655 [ + - ][ + - ]: 201 : if (it != mapTx.end()) {
656 : 0 : setEntries stage;
657 [ # # ]: 0 : stage.insert(it);
658 [ # # ]: 0 : RemoveStaged(stage, true, MemPoolRemovalReason::BLOCK);
659 : 0 : }
660 [ + - ]: 201 : removeConflicts(*tx);
661 [ + - ][ + - ]: 201 : ClearPrioritisation(tx->GetHash());
662 : : }
663 [ + - ]: 201 : lastRollingFeeUpdate = GetTime();
664 : 201 : blockSinceLastRollingFeeBump = true;
665 : 201 : }
666 : :
667 : 201 : void CTxMemPool::check(const CCoinsViewCache& active_coins_tip, int64_t spendheight) const
668 : : {
669 [ + - ]: 201 : if (m_check_ratio == 0) return;
670 : :
671 [ - + ]: 201 : if (GetRand(m_check_ratio) >= 1) return;
672 : :
673 : 201 : AssertLockHeld(::cs_main);
674 : 201 : LOCK(cs);
675 [ + - ][ + - ]: 201 : LogPrint(BCLog::MEMPOOL, "Checking mempool with %u transactions and %u inputs\n", (unsigned int)mapTx.size(), (unsigned int)mapNextTx.size());
[ # # ][ # # ]
[ # # ][ # # ]
676 : :
677 : 201 : uint64_t checkTotal = 0;
678 : 201 : CAmount check_total_fee{0};
679 : 201 : uint64_t innerUsage = 0;
680 : 201 : uint64_t prev_ancestor_count{0};
681 : :
682 [ + - ]: 201 : CCoinsViewCache mempoolDuplicate(const_cast<CCoinsViewCache*>(&active_coins_tip));
683 : :
684 [ + - ][ - + ]: 201 : for (const auto& it : GetSortedDepthAndScore()) {
685 [ # # ][ # # ]: 0 : checkTotal += it->GetTxSize();
686 [ # # ][ # # ]: 0 : check_total_fee += it->GetFee();
687 [ # # ][ # # ]: 0 : innerUsage += it->DynamicMemoryUsage();
688 [ # # ][ # # ]: 0 : const CTransaction& tx = it->GetTx();
689 [ # # ][ # # ]: 0 : innerUsage += memusage::DynamicUsage(it->GetMemPoolParentsConst()) + memusage::DynamicUsage(it->GetMemPoolChildrenConst());
[ # # ][ # # ]
[ # # ][ # # ]
690 : 0 : CTxMemPoolEntry::Parents setParentCheck;
691 [ # # ]: 0 : for (const CTxIn &txin : tx.vin) {
692 : : // Check that every mempool transaction's inputs refer to available coins, or other mempool tx's.
693 [ # # ]: 0 : indexed_transaction_set::const_iterator it2 = mapTx.find(txin.prevout.hash);
694 [ # # ][ # # ]: 0 : if (it2 != mapTx.end()) {
695 [ # # ][ # # ]: 0 : const CTransaction& tx2 = it2->GetTx();
696 [ # # ][ # # ]: 0 : assert(tx2.vout.size() > txin.prevout.n && !tx2.vout[txin.prevout.n].IsNull());
[ # # ]
697 [ # # ][ # # ]: 0 : setParentCheck.insert(*it2);
698 : 0 : }
699 : : // We are iterating through the mempool entries sorted in order by ancestor count.
700 : : // All parents must have been checked before their children and their coins added to
701 : : // the mempoolDuplicate coins cache.
702 [ # # ][ # # ]: 0 : assert(mempoolDuplicate.HaveCoin(txin.prevout));
703 : : // Check whether its inputs are marked in mapNextTx.
704 [ # # ]: 0 : auto it3 = mapNextTx.find(txin.prevout);
705 [ # # ][ # # ]: 0 : assert(it3 != mapNextTx.end());
706 [ # # ]: 0 : assert(it3->first == &txin.prevout);
707 [ # # ]: 0 : assert(it3->second == &tx);
708 : : }
709 : 0 : auto comp = [](const CTxMemPoolEntry& a, const CTxMemPoolEntry& b) -> bool {
710 : 0 : return a.GetTx().GetHash() == b.GetTx().GetHash();
711 : : };
712 [ # # ][ # # ]: 0 : assert(setParentCheck.size() == it->GetMemPoolParentsConst().size());
[ # # ]
713 [ # # ][ # # ]: 0 : assert(std::equal(setParentCheck.begin(), setParentCheck.end(), it->GetMemPoolParentsConst().begin(), comp));
[ # # ][ # # ]
714 : : // Verify ancestor state is correct.
715 [ # # ][ # # ]: 0 : auto ancestors{AssumeCalculateMemPoolAncestors(__func__, *it, Limits::NoLimits())};
[ # # ]
716 : 0 : uint64_t nCountCheck = ancestors.size() + 1;
717 [ # # ][ # # ]: 0 : int32_t nSizeCheck = it->GetTxSize();
718 [ # # ][ # # ]: 0 : CAmount nFeesCheck = it->GetModifiedFee();
719 [ # # ][ # # ]: 0 : int64_t nSigOpCheck = it->GetSigOpCost();
720 : :
721 [ # # ]: 0 : for (txiter ancestorIt : ancestors) {
722 [ # # ][ # # ]: 0 : nSizeCheck += ancestorIt->GetTxSize();
723 [ # # ][ # # ]: 0 : nFeesCheck += ancestorIt->GetModifiedFee();
724 [ # # ][ # # ]: 0 : nSigOpCheck += ancestorIt->GetSigOpCost();
725 : : }
726 : :
727 [ # # ][ # # ]: 0 : assert(it->GetCountWithAncestors() == nCountCheck);
[ # # ]
728 [ # # ][ # # ]: 0 : assert(it->GetSizeWithAncestors() == nSizeCheck);
[ # # ]
729 [ # # ][ # # ]: 0 : assert(it->GetSigOpCostWithAncestors() == nSigOpCheck);
[ # # ]
730 [ # # ][ # # ]: 0 : assert(it->GetModFeesWithAncestors() == nFeesCheck);
[ # # ]
731 : : // Sanity check: we are walking in ascending ancestor count order.
732 [ # # ][ # # ]: 0 : assert(prev_ancestor_count <= it->GetCountWithAncestors());
[ # # ]
733 [ # # ][ # # ]: 0 : prev_ancestor_count = it->GetCountWithAncestors();
734 : :
735 : : // Check children against mapNextTx
736 : 0 : CTxMemPoolEntry::Children setChildrenCheck;
737 [ # # ][ # # ]: 0 : auto iter = mapNextTx.lower_bound(COutPoint(it->GetTx().GetHash(), 0));
[ # # ][ # # ]
[ # # ]
738 : 0 : int32_t child_sizes{0};
739 [ # # ][ # # ]: 0 : for (; iter != mapNextTx.end() && iter->first->hash == it->GetTx().GetHash(); ++iter) {
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
740 [ # # ][ # # ]: 0 : txiter childit = mapTx.find(iter->second->GetHash());
741 [ # # ][ # # ]: 0 : assert(childit != mapTx.end()); // mapNextTx points to in-mempool transactions
742 [ # # ][ # # ]: 0 : if (setChildrenCheck.insert(*childit).second) {
[ # # ]
743 [ # # ][ # # ]: 0 : child_sizes += childit->GetTxSize();
744 : 0 : }
745 : 0 : }
746 [ # # ][ # # ]: 0 : assert(setChildrenCheck.size() == it->GetMemPoolChildrenConst().size());
[ # # ]
747 [ # # ][ # # ]: 0 : assert(std::equal(setChildrenCheck.begin(), setChildrenCheck.end(), it->GetMemPoolChildrenConst().begin(), comp));
[ # # ][ # # ]
748 : : // Also check to make sure size is greater than sum with immediate children.
749 : : // just a sanity check, not definitive that this calc is correct...
750 [ # # ][ # # ]: 0 : assert(it->GetSizeWithDescendants() >= child_sizes + it->GetTxSize());
[ # # ][ # # ]
[ # # ]
751 : :
752 : 0 : TxValidationState dummy_state; // Not used. CheckTxInputs() should always pass
753 : 0 : CAmount txfee = 0;
754 [ # # ][ # # ]: 0 : assert(!tx.IsCoinBase());
755 [ # # ][ # # ]: 0 : assert(Consensus::CheckTxInputs(tx, dummy_state, mempoolDuplicate, spendheight, txfee));
756 [ # # ][ # # ]: 0 : for (const auto& input: tx.vin) mempoolDuplicate.SpendCoin(input.prevout);
757 [ # # ]: 0 : AddCoins(mempoolDuplicate, tx, std::numeric_limits<int>::max());
758 : 0 : }
759 [ + - ][ + - ]: 201 : for (auto it = mapNextTx.cbegin(); it != mapNextTx.cend(); it++) {
[ - + ]
760 [ # # ]: 0 : uint256 hash = it->second->GetHash();
761 [ # # ]: 0 : indexed_transaction_set::const_iterator it2 = mapTx.find(hash);
762 [ # # ][ # # ]: 0 : const CTransaction& tx = it2->GetTx();
763 [ # # ][ # # ]: 0 : assert(it2 != mapTx.end());
764 [ # # ]: 0 : assert(&tx == it->second);
765 : 0 : }
766 : :
767 [ + - ]: 201 : assert(totalTxSize == checkTotal);
768 [ + - ]: 201 : assert(m_total_fee == check_total_fee);
769 [ + - ]: 201 : assert(innerUsage == cachedInnerUsage);
770 : 201 : }
771 : :
772 : 0 : bool CTxMemPool::CompareDepthAndScore(const uint256& hasha, const uint256& hashb, bool wtxid)
773 : : {
774 : : /* Return `true` if hasha should be considered sooner than hashb. Namely when:
775 : : * a is not in the mempool, but b is
776 : : * both are in the mempool and a has fewer ancestors than b
777 : : * both are in the mempool and a has a higher score than b
778 : : */
779 : 0 : LOCK(cs);
780 [ # # ][ # # ]: 0 : indexed_transaction_set::const_iterator j = wtxid ? get_iter_from_wtxid(hashb) : mapTx.find(hashb);
[ # # ]
781 [ # # ][ # # ]: 0 : if (j == mapTx.end()) return false;
782 [ # # ][ # # ]: 0 : indexed_transaction_set::const_iterator i = wtxid ? get_iter_from_wtxid(hasha) : mapTx.find(hasha);
[ # # ]
783 [ # # ][ # # ]: 0 : if (i == mapTx.end()) return true;
784 [ # # ][ # # ]: 0 : uint64_t counta = i->GetCountWithAncestors();
785 [ # # ][ # # ]: 0 : uint64_t countb = j->GetCountWithAncestors();
786 [ # # ]: 0 : if (counta == countb) {
787 [ # # ][ # # ]: 0 : return CompareTxMemPoolEntryByScore()(*i, *j);
[ # # ]
788 : : }
789 : 0 : return counta < countb;
790 : 0 : }
791 : :
792 : : namespace {
793 : : class DepthAndScoreComparator
794 : : {
795 : : public:
796 : 0 : bool operator()(const CTxMemPool::indexed_transaction_set::const_iterator& a, const CTxMemPool::indexed_transaction_set::const_iterator& b)
797 : : {
798 : 0 : uint64_t counta = a->GetCountWithAncestors();
799 : 0 : uint64_t countb = b->GetCountWithAncestors();
800 [ # # ]: 0 : if (counta == countb) {
801 : 0 : return CompareTxMemPoolEntryByScore()(*a, *b);
802 : : }
803 : 0 : return counta < countb;
804 : 0 : }
805 : : };
806 : : } // namespace
807 : :
808 : 201 : std::vector<CTxMemPool::indexed_transaction_set::const_iterator> CTxMemPool::GetSortedDepthAndScore() const
809 : : {
810 : 201 : std::vector<indexed_transaction_set::const_iterator> iters;
811 [ + - ]: 201 : AssertLockHeld(cs);
812 : :
813 [ + - ]: 201 : iters.reserve(mapTx.size());
814 : :
815 [ + - ][ - + ]: 201 : for (indexed_transaction_set::iterator mi = mapTx.begin(); mi != mapTx.end(); ++mi) {
[ # # ]
816 [ # # ]: 0 : iters.push_back(mi);
817 : 0 : }
818 [ + - ]: 201 : std::sort(iters.begin(), iters.end(), DepthAndScoreComparator());
819 : 201 : return iters;
820 [ + - ]: 201 : }
821 : :
822 : 0 : void CTxMemPool::queryHashes(std::vector<uint256>& vtxid) const
823 : : {
824 : 0 : LOCK(cs);
825 [ # # ]: 0 : auto iters = GetSortedDepthAndScore();
826 : :
827 : 0 : vtxid.clear();
828 [ # # ]: 0 : vtxid.reserve(mapTx.size());
829 : :
830 [ # # ]: 0 : for (auto it : iters) {
831 [ # # ][ # # ]: 0 : vtxid.push_back(it->GetTx().GetHash());
[ # # ][ # # ]
832 : : }
833 : 0 : }
834 : :
835 : 0 : static TxMempoolInfo GetInfo(CTxMemPool::indexed_transaction_set::const_iterator it) {
836 [ # # ][ # # ]: 0 : return TxMempoolInfo{it->GetSharedTx(), it->GetTime(), it->GetFee(), it->GetTxSize(), it->GetModifiedFee() - it->GetFee()};
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
837 : 0 : }
838 : :
839 : 0 : std::vector<TxMempoolInfo> CTxMemPool::infoAll() const
840 : : {
841 : 0 : LOCK(cs);
842 [ # # ]: 0 : auto iters = GetSortedDepthAndScore();
843 : :
844 : 0 : std::vector<TxMempoolInfo> ret;
845 [ # # ]: 0 : ret.reserve(mapTx.size());
846 [ # # ]: 0 : for (auto it : iters) {
847 [ # # ][ # # ]: 0 : ret.push_back(GetInfo(it));
848 : : }
849 : :
850 : 0 : return ret;
851 [ # # ]: 0 : }
852 : :
853 : 0 : CTransactionRef CTxMemPool::get(const uint256& hash) const
854 : : {
855 : 0 : LOCK(cs);
856 [ # # ]: 0 : indexed_transaction_set::const_iterator i = mapTx.find(hash);
857 [ # # ][ # # ]: 0 : if (i == mapTx.end())
858 : 0 : return nullptr;
859 [ # # ][ # # ]: 0 : return i->GetSharedTx();
860 : 0 : }
861 : :
862 : 0 : TxMempoolInfo CTxMemPool::info(const GenTxid& gtxid) const
863 : : {
864 : 0 : LOCK(cs);
865 [ # # ][ # # ]: 0 : indexed_transaction_set::const_iterator i = (gtxid.IsWtxid() ? get_iter_from_wtxid(gtxid.GetHash()) : mapTx.find(gtxid.GetHash()));
[ # # ][ # # ]
[ # # ][ # # ]
866 [ # # ][ # # ]: 0 : if (i == mapTx.end())
867 : 0 : return TxMempoolInfo();
868 [ # # ]: 0 : return GetInfo(i);
869 : 0 : }
870 : :
871 : 0 : TxMempoolInfo CTxMemPool::info_for_relay(const GenTxid& gtxid, uint64_t last_sequence) const
872 : : {
873 : 0 : LOCK(cs);
874 [ # # ][ # # ]: 0 : indexed_transaction_set::const_iterator i = (gtxid.IsWtxid() ? get_iter_from_wtxid(gtxid.GetHash()) : mapTx.find(gtxid.GetHash()));
[ # # ][ # # ]
[ # # ][ # # ]
875 [ # # ][ # # ]: 0 : if (i != mapTx.end() && i->GetSequence() < last_sequence) {
[ # # ][ # # ]
[ # # ]
876 [ # # ]: 0 : return GetInfo(i);
877 : : } else {
878 : 0 : return TxMempoolInfo();
879 : : }
880 : 0 : }
881 : :
882 : 0 : void CTxMemPool::PrioritiseTransaction(const uint256& hash, const CAmount& nFeeDelta)
883 : : {
884 : : {
885 : 0 : LOCK(cs);
886 [ # # ]: 0 : CAmount &delta = mapDeltas[hash];
887 : 0 : delta = SaturatingAdd(delta, nFeeDelta);
888 [ # # ]: 0 : txiter it = mapTx.find(hash);
889 [ # # ][ # # ]: 0 : if (it != mapTx.end()) {
890 [ # # ]: 0 : mapTx.modify(it, [&nFeeDelta](CTxMemPoolEntry& e) { e.UpdateModifiedFee(nFeeDelta); });
891 : : // Now update all ancestors' modified fees with descendants
892 [ # # ][ # # ]: 0 : auto ancestors{AssumeCalculateMemPoolAncestors(__func__, *it, Limits::NoLimits(), /*fSearchForParents=*/false)};
[ # # ]
893 [ # # ]: 0 : for (txiter ancestorIt : ancestors) {
894 [ # # ]: 0 : mapTx.modify(ancestorIt, [=](CTxMemPoolEntry& e){ e.UpdateDescendantState(0, nFeeDelta, 0);});
895 : : }
896 : : // Now update all descendants' modified fees with ancestors
897 : 0 : setEntries setDescendants;
898 [ # # ]: 0 : CalculateDescendants(it, setDescendants);
899 [ # # ]: 0 : setDescendants.erase(it);
900 [ # # ]: 0 : for (txiter descendantIt : setDescendants) {
901 [ # # ]: 0 : mapTx.modify(descendantIt, [=](CTxMemPoolEntry& e){ e.UpdateAncestorState(0, nFeeDelta, 0, 0); });
902 : : }
903 : 0 : ++nTransactionsUpdated;
904 : 0 : }
905 [ # # ]: 0 : if (delta == 0) {
906 [ # # ]: 0 : mapDeltas.erase(hash);
907 [ # # ][ # # ]: 0 : LogPrintf("PrioritiseTransaction: %s (%sin mempool) delta cleared\n", hash.ToString(), it == mapTx.end() ? "not " : "");
[ # # ][ # # ]
[ # # ]
908 : 0 : } else {
909 [ # # ][ # # ]: 0 : LogPrintf("PrioritiseTransaction: %s (%sin mempool) fee += %s, new delta=%s\n",
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
910 : : hash.ToString(),
911 : : it == mapTx.end() ? "not " : "",
912 : : FormatMoney(nFeeDelta),
913 : : FormatMoney(delta));
914 : : }
915 : 0 : }
916 : 0 : }
917 : :
918 : 0 : void CTxMemPool::ApplyDelta(const uint256& hash, CAmount &nFeeDelta) const
919 : : {
920 : 0 : AssertLockHeld(cs);
921 : 0 : std::map<uint256, CAmount>::const_iterator pos = mapDeltas.find(hash);
922 [ # # ]: 0 : if (pos == mapDeltas.end())
923 : 0 : return;
924 : 0 : const CAmount &delta = pos->second;
925 : 0 : nFeeDelta += delta;
926 : 0 : }
927 : :
928 : 201 : void CTxMemPool::ClearPrioritisation(const uint256& hash)
929 : : {
930 : 201 : AssertLockHeld(cs);
931 : 201 : mapDeltas.erase(hash);
932 : 201 : }
933 : :
934 : 0 : std::vector<CTxMemPool::delta_info> CTxMemPool::GetPrioritisedTransactions() const
935 : : {
936 : 0 : AssertLockNotHeld(cs);
937 : 0 : LOCK(cs);
938 : 0 : std::vector<delta_info> result;
939 [ # # ]: 0 : result.reserve(mapDeltas.size());
940 [ # # ]: 0 : for (const auto& [txid, delta] : mapDeltas) {
941 [ # # ][ # # ]: 0 : const auto iter{mapTx.find(txid)};
942 [ # # ]: 0 : const bool in_mempool{iter != mapTx.end()};
943 : 0 : std::optional<CAmount> modified_fee;
944 [ # # ][ # # ]: 0 : if (in_mempool) modified_fee = iter->GetModifiedFee();
[ # # ]
945 [ # # ][ # # ]: 0 : result.emplace_back(delta_info{in_mempool, delta, modified_fee, txid});
[ # # ]
946 : : }
947 : 0 : return result;
948 [ # # ]: 0 : }
949 : :
950 : 0 : const CTransaction* CTxMemPool::GetConflictTx(const COutPoint& prevout) const
951 : : {
952 : 0 : const auto it = mapNextTx.find(prevout);
953 [ # # ]: 0 : return it == mapNextTx.end() ? nullptr : it->second;
954 : : }
955 : :
956 : 0 : std::optional<CTxMemPool::txiter> CTxMemPool::GetIter(const uint256& txid) const
957 : : {
958 : 0 : auto it = mapTx.find(txid);
959 [ # # ]: 0 : if (it != mapTx.end()) return it;
960 : 0 : return std::nullopt;
961 : 0 : }
962 : :
963 : 0 : CTxMemPool::setEntries CTxMemPool::GetIterSet(const std::set<uint256>& hashes) const
964 : : {
965 : 0 : CTxMemPool::setEntries ret;
966 [ # # ]: 0 : for (const auto& h : hashes) {
967 [ # # ]: 0 : const auto mi = GetIter(h);
968 [ # # ][ # # ]: 0 : if (mi) ret.insert(*mi);
969 : : }
970 : 0 : return ret;
971 [ # # ]: 0 : }
972 : :
973 : 0 : std::vector<CTxMemPool::txiter> CTxMemPool::GetIterVec(const std::vector<uint256>& txids) const
974 : : {
975 : 0 : AssertLockHeld(cs);
976 : 0 : std::vector<txiter> ret;
977 [ # # ]: 0 : ret.reserve(txids.size());
978 [ # # ]: 0 : for (const auto& txid : txids) {
979 [ # # ]: 0 : const auto it{GetIter(txid)};
980 [ # # ]: 0 : if (!it) return {};
981 [ # # ]: 0 : ret.push_back(*it);
982 : : }
983 : 0 : return ret;
984 : 0 : }
985 : :
986 : 0 : bool CTxMemPool::HasNoInputsOf(const CTransaction &tx) const
987 : : {
988 [ # # ]: 0 : for (unsigned int i = 0; i < tx.vin.size(); i++)
989 [ # # ]: 0 : if (exists(GenTxid::Txid(tx.vin[i].prevout.hash)))
990 : 0 : return false;
991 : 0 : return true;
992 : 0 : }
993 : :
994 [ # # ][ # # ]: 0 : CCoinsViewMemPool::CCoinsViewMemPool(CCoinsView* baseIn, const CTxMemPool& mempoolIn) : CCoinsViewBacked(baseIn), mempool(mempoolIn) { }
995 : :
996 : 0 : bool CCoinsViewMemPool::GetCoin(const COutPoint &outpoint, Coin &coin) const {
997 : : // Check to see if the inputs are made available by another tx in the package.
998 : : // These Coins would not be available in the underlying CoinsView.
999 [ # # ]: 0 : if (auto it = m_temp_added.find(outpoint); it != m_temp_added.end()) {
1000 : 0 : coin = it->second;
1001 : 0 : return true;
1002 : : }
1003 : :
1004 : : // If an entry in the mempool exists, always return that one, as it's guaranteed to never
1005 : : // conflict with the underlying cache, and it cannot have pruned entries (as it contains full)
1006 : : // transactions. First checking the underlying cache risks returning a pruned entry instead.
1007 : 0 : CTransactionRef ptx = mempool.get(outpoint.hash);
1008 [ # # ]: 0 : if (ptx) {
1009 [ # # ]: 0 : if (outpoint.n < ptx->vout.size()) {
1010 [ # # ]: 0 : coin = Coin(ptx->vout[outpoint.n], MEMPOOL_HEIGHT, false);
1011 [ # # ]: 0 : m_non_base_coins.emplace(outpoint);
1012 : 0 : return true;
1013 : : } else {
1014 : 0 : return false;
1015 : : }
1016 : : }
1017 [ # # ]: 0 : return base->GetCoin(outpoint, coin);
1018 : 0 : }
1019 : :
1020 : 0 : void CCoinsViewMemPool::PackageAddTransaction(const CTransactionRef& tx)
1021 : : {
1022 [ # # ]: 0 : for (unsigned int n = 0; n < tx->vout.size(); ++n) {
1023 [ # # ]: 0 : m_temp_added.emplace(COutPoint(tx->GetHash(), n), Coin(tx->vout[n], MEMPOOL_HEIGHT, false));
1024 : 0 : m_non_base_coins.emplace(COutPoint(tx->GetHash(), n));
1025 : 0 : }
1026 : 0 : }
1027 : 0 : void CCoinsViewMemPool::Reset()
1028 : : {
1029 : 0 : m_temp_added.clear();
1030 : 0 : m_non_base_coins.clear();
1031 : 0 : }
1032 : :
1033 : 603 : size_t CTxMemPool::DynamicMemoryUsage() const {
1034 : 603 : LOCK(cs);
1035 : : // Estimate the overhead of mapTx to be 15 pointers + an allocation, as no exact formula for boost::multi_index_contained is implemented.
1036 [ + - ][ + - ]: 603 : return memusage::MallocUsage(sizeof(CTxMemPoolEntry) + 15 * sizeof(void*)) * mapTx.size() + memusage::DynamicUsage(mapNextTx) + memusage::DynamicUsage(mapDeltas) + memusage::DynamicUsage(vTxHashes) + cachedInnerUsage;
[ + - ][ + - ]
1037 : 603 : }
1038 : :
1039 : 0 : void CTxMemPool::RemoveUnbroadcastTx(const uint256& txid, const bool unchecked) {
1040 : 0 : LOCK(cs);
1041 : :
1042 [ # # ][ # # ]: 0 : if (m_unbroadcast_txids.erase(txid))
1043 : : {
1044 [ # # ][ # # ]: 0 : LogPrint(BCLog::MEMPOOL, "Removed %i from set of unbroadcast txns%s\n", txid.GetHex(), (unchecked ? " before confirmation that txn was sent out" : ""));
[ # # ][ # # ]
[ # # ][ # # ]
1045 : 0 : }
1046 : 0 : }
1047 : :
1048 : 0 : void CTxMemPool::RemoveStaged(setEntries &stage, bool updateDescendants, MemPoolRemovalReason reason) {
1049 : 0 : AssertLockHeld(cs);
1050 : 0 : UpdateForRemoveFromMempool(stage, updateDescendants);
1051 [ # # ]: 0 : for (txiter it : stage) {
1052 : 0 : removeUnchecked(it, reason);
1053 : : }
1054 : 0 : }
1055 : :
1056 : 0 : int CTxMemPool::Expire(std::chrono::seconds time)
1057 : : {
1058 : 0 : AssertLockHeld(cs);
1059 : 0 : indexed_transaction_set::index<entry_time>::type::iterator it = mapTx.get<entry_time>().begin();
1060 : 0 : setEntries toremove;
1061 [ # # ][ # # ]: 0 : while (it != mapTx.get<entry_time>().end() && it->GetTime() < time) {
[ # # ][ # # ]
[ # # ][ # # ]
1062 [ # # ][ # # ]: 0 : toremove.insert(mapTx.project<0>(it));
1063 [ # # ]: 0 : it++;
1064 : : }
1065 : 0 : setEntries stage;
1066 [ # # ]: 0 : for (txiter removeit : toremove) {
1067 [ # # ]: 0 : CalculateDescendants(removeit, stage);
1068 : : }
1069 [ # # ]: 0 : RemoveStaged(stage, false, MemPoolRemovalReason::EXPIRY);
1070 : 0 : return stage.size();
1071 : 0 : }
1072 : :
1073 : 0 : void CTxMemPool::addUnchecked(const CTxMemPoolEntry &entry, bool validFeeEstimate)
1074 : : {
1075 : 0 : auto ancestors{AssumeCalculateMemPoolAncestors(__func__, entry, Limits::NoLimits())};
1076 [ # # ]: 0 : return addUnchecked(entry, ancestors, validFeeEstimate);
1077 : 0 : }
1078 : :
1079 : 0 : void CTxMemPool::UpdateChild(txiter entry, txiter child, bool add)
1080 : : {
1081 : 0 : AssertLockHeld(cs);
1082 : 0 : CTxMemPoolEntry::Children s;
1083 [ # # ][ # # ]: 0 : if (add && entry->GetMemPoolChildren().insert(*child).second) {
[ # # ][ # # ]
[ # # ][ # # ]
1084 [ # # ]: 0 : cachedInnerUsage += memusage::IncrementalDynamicUsage(s);
1085 [ # # ][ # # ]: 0 : } else if (!add && entry->GetMemPoolChildren().erase(*child)) {
[ # # ][ # # ]
[ # # ][ # # ]
1086 [ # # ]: 0 : cachedInnerUsage -= memusage::IncrementalDynamicUsage(s);
1087 : 0 : }
1088 : 0 : }
1089 : :
1090 : 0 : void CTxMemPool::UpdateParent(txiter entry, txiter parent, bool add)
1091 : : {
1092 : 0 : AssertLockHeld(cs);
1093 : 0 : CTxMemPoolEntry::Parents s;
1094 [ # # ][ # # ]: 0 : if (add && entry->GetMemPoolParents().insert(*parent).second) {
[ # # ][ # # ]
[ # # ][ # # ]
1095 [ # # ]: 0 : cachedInnerUsage += memusage::IncrementalDynamicUsage(s);
1096 [ # # ][ # # ]: 0 : } else if (!add && entry->GetMemPoolParents().erase(*parent)) {
[ # # ][ # # ]
[ # # ][ # # ]
1097 [ # # ]: 0 : cachedInnerUsage -= memusage::IncrementalDynamicUsage(s);
1098 : 0 : }
1099 : 0 : }
1100 : :
1101 : 159 : CFeeRate CTxMemPool::GetMinFee(size_t sizelimit) const {
1102 : 159 : LOCK(cs);
1103 [ + - ][ - + ]: 159 : if (!blockSinceLastRollingFeeBump || rollingMinimumFeeRate == 0)
1104 [ + - ]: 159 : return CFeeRate(llround(rollingMinimumFeeRate));
1105 : :
1106 [ # # ]: 0 : int64_t time = GetTime();
1107 [ # # ]: 0 : if (time > lastRollingFeeUpdate + 10) {
1108 : 0 : double halflife = ROLLING_FEE_HALFLIFE;
1109 [ # # ][ # # ]: 0 : if (DynamicMemoryUsage() < sizelimit / 4)
1110 : 0 : halflife /= 4;
1111 [ # # ][ # # ]: 0 : else if (DynamicMemoryUsage() < sizelimit / 2)
1112 : 0 : halflife /= 2;
1113 : :
1114 : 0 : rollingMinimumFeeRate = rollingMinimumFeeRate / pow(2.0, (time - lastRollingFeeUpdate) / halflife);
1115 : 0 : lastRollingFeeUpdate = time;
1116 : :
1117 [ # # ][ # # ]: 0 : if (rollingMinimumFeeRate < (double)m_incremental_relay_feerate.GetFeePerK() / 2) {
1118 : 0 : rollingMinimumFeeRate = 0;
1119 [ # # ]: 0 : return CFeeRate(0);
1120 : : }
1121 : 0 : }
1122 [ # # ][ # # ]: 0 : return std::max(CFeeRate(llround(rollingMinimumFeeRate)), m_incremental_relay_feerate);
1123 : 159 : }
1124 : :
1125 : 0 : void CTxMemPool::trackPackageRemoved(const CFeeRate& rate) {
1126 : 0 : AssertLockHeld(cs);
1127 [ # # ]: 0 : if (rate.GetFeePerK() > rollingMinimumFeeRate) {
1128 : 0 : rollingMinimumFeeRate = rate.GetFeePerK();
1129 : 0 : blockSinceLastRollingFeeBump = false;
1130 : 0 : }
1131 : 0 : }
1132 : :
1133 : 0 : void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<COutPoint>* pvNoSpendsRemaining) {
1134 : 0 : AssertLockHeld(cs);
1135 : :
1136 : 0 : unsigned nTxnRemoved = 0;
1137 : 0 : CFeeRate maxFeeRateRemoved(0);
1138 [ # # ][ # # ]: 0 : while (!mapTx.empty() && DynamicMemoryUsage() > sizelimit) {
1139 : 0 : indexed_transaction_set::index<descendant_score>::type::iterator it = mapTx.get<descendant_score>().begin();
1140 : :
1141 : : // We set the new mempool min fee to the feerate of the removed set, plus the
1142 : : // "minimum reasonable fee rate" (ie some value under which we consider txn
1143 : : // to have 0 fee). This way, we don't allow txn to enter mempool with feerate
1144 : : // equal to txn which were removed with no block in between.
1145 : 0 : CFeeRate removed(it->GetModFeesWithDescendants(), it->GetSizeWithDescendants());
1146 : 0 : removed += m_incremental_relay_feerate;
1147 : 0 : trackPackageRemoved(removed);
1148 : 0 : maxFeeRateRemoved = std::max(maxFeeRateRemoved, removed);
1149 : :
1150 : 0 : setEntries stage;
1151 [ # # ][ # # ]: 0 : CalculateDescendants(mapTx.project<0>(it), stage);
1152 : 0 : nTxnRemoved += stage.size();
1153 : :
1154 : 0 : std::vector<CTransaction> txn;
1155 [ # # ]: 0 : if (pvNoSpendsRemaining) {
1156 [ # # ]: 0 : txn.reserve(stage.size());
1157 [ # # ]: 0 : for (txiter iter : stage)
1158 [ # # ][ # # ]: 0 : txn.push_back(iter->GetTx());
[ # # ]
1159 : 0 : }
1160 [ # # ]: 0 : RemoveStaged(stage, false, MemPoolRemovalReason::SIZELIMIT);
1161 [ # # ]: 0 : if (pvNoSpendsRemaining) {
1162 [ # # ]: 0 : for (const CTransaction& tx : txn) {
1163 [ # # ]: 0 : for (const CTxIn& txin : tx.vin) {
1164 [ # # ][ # # ]: 0 : if (exists(GenTxid::Txid(txin.prevout.hash))) continue;
[ # # ]
1165 [ # # ]: 0 : pvNoSpendsRemaining->push_back(txin.prevout);
1166 : : }
1167 : : }
1168 : 0 : }
1169 : 0 : }
1170 : :
1171 [ # # ]: 0 : if (maxFeeRateRemoved > CFeeRate(0)) {
1172 [ # # ][ # # ]: 0 : LogPrint(BCLog::MEMPOOL, "Removed %u txn, rolling minimum fee bumped to %s\n", nTxnRemoved, maxFeeRateRemoved.ToString());
[ # # ][ # # ]
[ # # ]
1173 : 0 : }
1174 : 0 : }
1175 : :
1176 : 0 : uint64_t CTxMemPool::CalculateDescendantMaximum(txiter entry) const {
1177 : : // find parent with highest descendant count
1178 : 0 : std::vector<txiter> candidates;
1179 : 0 : setEntries counted;
1180 [ # # ]: 0 : candidates.push_back(entry);
1181 : 0 : uint64_t maximum = 0;
1182 [ # # ]: 0 : while (candidates.size()) {
1183 : 0 : txiter candidate = candidates.back();
1184 : 0 : candidates.pop_back();
1185 [ # # ][ # # ]: 0 : if (!counted.insert(candidate).second) continue;
1186 [ # # ][ # # ]: 0 : const CTxMemPoolEntry::Parents& parents = candidate->GetMemPoolParentsConst();
1187 [ # # ]: 0 : if (parents.size() == 0) {
1188 [ # # ][ # # ]: 0 : maximum = std::max(maximum, candidate->GetCountWithDescendants());
[ # # ]
1189 : 0 : } else {
1190 [ # # ]: 0 : for (const CTxMemPoolEntry& i : parents) {
1191 [ # # ][ # # ]: 0 : candidates.push_back(mapTx.iterator_to(i));
1192 : : }
1193 : : }
1194 : : }
1195 : 0 : return maximum;
1196 : 0 : }
1197 : :
1198 : 0 : void CTxMemPool::GetTransactionAncestry(const uint256& txid, size_t& ancestors, size_t& descendants, size_t* const ancestorsize, CAmount* const ancestorfees) const {
1199 : 0 : LOCK(cs);
1200 [ # # ]: 0 : auto it = mapTx.find(txid);
1201 : 0 : ancestors = descendants = 0;
1202 [ # # ][ # # ]: 0 : if (it != mapTx.end()) {
1203 [ # # ][ # # ]: 0 : ancestors = it->GetCountWithAncestors();
1204 [ # # ][ # # ]: 0 : if (ancestorsize) *ancestorsize = it->GetSizeWithAncestors();
[ # # ]
1205 [ # # ][ # # ]: 0 : if (ancestorfees) *ancestorfees = it->GetModFeesWithAncestors();
[ # # ]
1206 [ # # ]: 0 : descendants = CalculateDescendantMaximum(it);
1207 : 0 : }
1208 : 0 : }
1209 : :
1210 : 0 : bool CTxMemPool::GetLoadTried() const
1211 : : {
1212 : 0 : LOCK(cs);
1213 : 0 : return m_load_tried;
1214 : 0 : }
1215 : :
1216 : 0 : void CTxMemPool::SetLoadTried(bool load_tried)
1217 : : {
1218 : 0 : LOCK(cs);
1219 : 0 : m_load_tried = load_tried;
1220 : 0 : }
1221 : :
1222 : 0 : std::vector<CTxMemPool::txiter> CTxMemPool::GatherClusters(const std::vector<uint256>& txids) const
1223 : : {
1224 : 0 : AssertLockHeld(cs);
1225 : 0 : std::vector<txiter> clustered_txs{GetIterVec(txids)};
1226 : : // Use epoch: visiting an entry means we have added it to the clustered_txs vector. It does not
1227 : : // necessarily mean the entry has been processed.
1228 [ # # ]: 0 : WITH_FRESH_EPOCH(m_epoch);
1229 [ # # ]: 0 : for (const auto& it : clustered_txs) {
1230 [ # # ]: 0 : visited(it);
1231 : : }
1232 : : // i = index of where the list of entries to process starts
1233 [ # # ]: 0 : for (size_t i{0}; i < clustered_txs.size(); ++i) {
1234 : : // DoS protection: if there are 500 or more entries to process, just quit.
1235 [ # # ]: 0 : if (clustered_txs.size() > 500) return {};
1236 [ # # ]: 0 : const txiter& tx_iter = clustered_txs.at(i);
1237 [ # # ][ # # ]: 0 : for (const auto& entries : {tx_iter->GetMemPoolParentsConst(), tx_iter->GetMemPoolChildrenConst()}) {
[ # # ][ # # ]
[ # # ][ # # ]
[ # # ]
1238 [ # # ]: 0 : for (const CTxMemPoolEntry& entry : entries) {
1239 [ # # ]: 0 : const auto entry_it = mapTx.iterator_to(entry);
1240 [ # # ][ # # ]: 0 : if (!visited(entry_it)) {
1241 [ # # ]: 0 : clustered_txs.push_back(entry_it);
1242 : 0 : }
1243 : : }
1244 : : }
1245 : 0 : }
1246 : 0 : return clustered_txs;
1247 : 0 : }
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