Bitcoin Core  0.20.99
P2P Digital Currency
txmempool.h
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1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2020 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 #ifndef BITCOIN_TXMEMPOOL_H
7 #define BITCOIN_TXMEMPOOL_H
8 
9 #include <atomic>
10 #include <map>
11 #include <set>
12 #include <string>
13 #include <utility>
14 #include <vector>
15 
16 #include <amount.h>
17 #include <coins.h>
18 #include <crypto/siphash.h>
19 #include <indirectmap.h>
20 #include <optional.h>
21 #include <policy/feerate.h>
22 #include <primitives/transaction.h>
23 #include <sync.h>
24 #include <random.h>
25 
26 #include <boost/multi_index_container.hpp>
27 #include <boost/multi_index/hashed_index.hpp>
28 #include <boost/multi_index/ordered_index.hpp>
29 #include <boost/multi_index/sequenced_index.hpp>
30 
31 class CBlockIndex;
32 extern RecursiveMutex cs_main;
33 
35 static const uint32_t MEMPOOL_HEIGHT = 0x7FFFFFFF;
36 
37 struct LockPoints
38 {
39  // Will be set to the blockchain height and median time past
40  // values that would be necessary to satisfy all relative locktime
41  // constraints (BIP68) of this tx given our view of block chain history
42  int height;
43  int64_t time;
44  // As long as the current chain descends from the highest height block
45  // containing one of the inputs used in the calculation, then the cached
46  // values are still valid even after a reorg.
48 
49  LockPoints() : height(0), time(0), maxInputBlock(nullptr) { }
50 };
51 
65 {
66 private:
68  const CAmount nFee;
69  const size_t nTxWeight;
70  const size_t nUsageSize;
71  const int64_t nTime;
72  const unsigned int entryHeight;
73  const bool spendsCoinbase;
74  const int64_t sigOpCost;
75  int64_t feeDelta;
77 
78  // Information about descendants of this transaction that are in the
79  // mempool; if we remove this transaction we must remove all of these
80  // descendants as well.
84 
85  // Analogous statistics for ancestor transactions
90 
91 public:
92  CTxMemPoolEntry(const CTransactionRef& _tx, const CAmount& _nFee,
93  int64_t _nTime, unsigned int _entryHeight,
94  bool spendsCoinbase,
95  int64_t nSigOpsCost, LockPoints lp);
96 
97  const CTransaction& GetTx() const { return *this->tx; }
98  CTransactionRef GetSharedTx() const { return this->tx; }
99  const CAmount& GetFee() const { return nFee; }
100  size_t GetTxSize() const;
101  size_t GetTxWeight() const { return nTxWeight; }
102  std::chrono::seconds GetTime() const { return std::chrono::seconds{nTime}; }
103  unsigned int GetHeight() const { return entryHeight; }
104  int64_t GetSigOpCost() const { return sigOpCost; }
105  int64_t GetModifiedFee() const { return nFee + feeDelta; }
106  size_t DynamicMemoryUsage() const { return nUsageSize; }
107  const LockPoints& GetLockPoints() const { return lockPoints; }
108 
109  // Adjusts the descendant state.
110  void UpdateDescendantState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount);
111  // Adjusts the ancestor state
112  void UpdateAncestorState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount, int64_t modifySigOps);
113  // Updates the fee delta used for mining priority score, and the
114  // modified fees with descendants.
115  void UpdateFeeDelta(int64_t feeDelta);
116  // Update the LockPoints after a reorg
117  void UpdateLockPoints(const LockPoints& lp);
118 
119  uint64_t GetCountWithDescendants() const { return nCountWithDescendants; }
120  uint64_t GetSizeWithDescendants() const { return nSizeWithDescendants; }
121  CAmount GetModFeesWithDescendants() const { return nModFeesWithDescendants; }
122 
123  bool GetSpendsCoinbase() const { return spendsCoinbase; }
124 
125  uint64_t GetCountWithAncestors() const { return nCountWithAncestors; }
126  uint64_t GetSizeWithAncestors() const { return nSizeWithAncestors; }
127  CAmount GetModFeesWithAncestors() const { return nModFeesWithAncestors; }
128  int64_t GetSigOpCostWithAncestors() const { return nSigOpCostWithAncestors; }
129 
130  mutable size_t vTxHashesIdx;
131  mutable uint64_t m_epoch;
132 };
133 
134 // Helpers for modifying CTxMemPool::mapTx, which is a boost multi_index.
136 {
137  update_descendant_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount) :
138  modifySize(_modifySize), modifyFee(_modifyFee), modifyCount(_modifyCount)
139  {}
140 
141  void operator() (CTxMemPoolEntry &e)
142  { e.UpdateDescendantState(modifySize, modifyFee, modifyCount); }
143 
144  private:
145  int64_t modifySize;
147  int64_t modifyCount;
148 };
149 
151 {
152  update_ancestor_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount, int64_t _modifySigOpsCost) :
153  modifySize(_modifySize), modifyFee(_modifyFee), modifyCount(_modifyCount), modifySigOpsCost(_modifySigOpsCost)
154  {}
155 
156  void operator() (CTxMemPoolEntry &e)
157  { e.UpdateAncestorState(modifySize, modifyFee, modifyCount, modifySigOpsCost); }
158 
159  private:
160  int64_t modifySize;
162  int64_t modifyCount;
164 };
165 
167 {
168  explicit update_fee_delta(int64_t _feeDelta) : feeDelta(_feeDelta) { }
169 
170  void operator() (CTxMemPoolEntry &e) { e.UpdateFeeDelta(feeDelta); }
171 
172 private:
173  int64_t feeDelta;
174 };
175 
177 {
178  explicit update_lock_points(const LockPoints& _lp) : lp(_lp) { }
179 
180  void operator() (CTxMemPoolEntry &e) { e.UpdateLockPoints(lp); }
181 
182 private:
183  const LockPoints& lp;
184 };
185 
186 // extracts a transaction hash from CTxMemPoolEntry or CTransactionRef
188 {
190  result_type operator() (const CTxMemPoolEntry &entry) const
191  {
192  return entry.GetTx().GetHash();
193  }
194 
195  result_type operator() (const CTransactionRef& tx) const
196  {
197  return tx->GetHash();
198  }
199 };
200 
206 {
207 public:
208  bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b) const
209  {
210  double a_mod_fee, a_size, b_mod_fee, b_size;
211 
212  GetModFeeAndSize(a, a_mod_fee, a_size);
213  GetModFeeAndSize(b, b_mod_fee, b_size);
214 
215  // Avoid division by rewriting (a/b > c/d) as (a*d > c*b).
216  double f1 = a_mod_fee * b_size;
217  double f2 = a_size * b_mod_fee;
218 
219  if (f1 == f2) {
220  return a.GetTime() >= b.GetTime();
221  }
222  return f1 < f2;
223  }
224 
225  // Return the fee/size we're using for sorting this entry.
226  void GetModFeeAndSize(const CTxMemPoolEntry &a, double &mod_fee, double &size) const
227  {
228  // Compare feerate with descendants to feerate of the transaction, and
229  // return the fee/size for the max.
230  double f1 = (double)a.GetModifiedFee() * a.GetSizeWithDescendants();
231  double f2 = (double)a.GetModFeesWithDescendants() * a.GetTxSize();
232 
233  if (f2 > f1) {
234  mod_fee = a.GetModFeesWithDescendants();
235  size = a.GetSizeWithDescendants();
236  } else {
237  mod_fee = a.GetModifiedFee();
238  size = a.GetTxSize();
239  }
240  }
241 };
242 
251 {
252 public:
253  bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b) const
254  {
255  double f1 = (double)a.GetFee() * b.GetTxSize();
256  double f2 = (double)b.GetFee() * a.GetTxSize();
257  if (f1 == f2) {
258  return b.GetTx().GetHash() < a.GetTx().GetHash();
259  }
260  return f1 > f2;
261  }
262 };
263 
265 {
266 public:
267  bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b) const
268  {
269  return a.GetTime() < b.GetTime();
270  }
271 };
272 
278 {
279 public:
280  template<typename T>
281  bool operator()(const T& a, const T& b) const
282  {
283  double a_mod_fee, a_size, b_mod_fee, b_size;
284 
285  GetModFeeAndSize(a, a_mod_fee, a_size);
286  GetModFeeAndSize(b, b_mod_fee, b_size);
287 
288  // Avoid division by rewriting (a/b > c/d) as (a*d > c*b).
289  double f1 = a_mod_fee * b_size;
290  double f2 = a_size * b_mod_fee;
291 
292  if (f1 == f2) {
293  return a.GetTx().GetHash() < b.GetTx().GetHash();
294  }
295  return f1 > f2;
296  }
297 
298  // Return the fee/size we're using for sorting this entry.
299  template <typename T>
300  void GetModFeeAndSize(const T &a, double &mod_fee, double &size) const
301  {
302  // Compare feerate with ancestors to feerate of the transaction, and
303  // return the fee/size for the min.
304  double f1 = (double)a.GetModifiedFee() * a.GetSizeWithAncestors();
305  double f2 = (double)a.GetModFeesWithAncestors() * a.GetTxSize();
306 
307  if (f1 > f2) {
308  mod_fee = a.GetModFeesWithAncestors();
309  size = a.GetSizeWithAncestors();
310  } else {
311  mod_fee = a.GetModifiedFee();
312  size = a.GetTxSize();
313  }
314  }
315 };
316 
317 // Multi_index tag names
319 struct entry_time {};
320 struct ancestor_score {};
321 
323 
328 {
331 
333  std::chrono::seconds m_time;
334 
337 
339  size_t vsize;
340 
342  int64_t nFeeDelta;
343 };
344 
349  EXPIRY,
350  SIZELIMIT,
351  REORG,
352  BLOCK,
353  CONFLICT,
354  REPLACED,
355 };
356 
358 {
359 private:
361  const uint64_t k0, k1;
362 
363 public:
365 
366  size_t operator()(const uint256& txid) const {
367  return SipHashUint256(k0, k1, txid);
368  }
369 };
370 
444 {
445 private:
446  uint32_t nCheckFrequency GUARDED_BY(cs);
447  std::atomic<unsigned int> nTransactionsUpdated;
449 
450  uint64_t totalTxSize;
451  uint64_t cachedInnerUsage;
452 
453  mutable int64_t lastRollingFeeUpdate;
455  mutable double rollingMinimumFeeRate;
456  mutable uint64_t m_epoch;
457  mutable bool m_has_epoch_guard;
458 
459  void trackPackageRemoved(const CFeeRate& rate) EXCLUSIVE_LOCKS_REQUIRED(cs);
460 
461  bool m_is_loaded GUARDED_BY(cs){false};
462 
463 public:
464 
465  static const int ROLLING_FEE_HALFLIFE = 60 * 60 * 12; // public only for testing
466 
467  typedef boost::multi_index_container<
469  boost::multi_index::indexed_by<
470  // sorted by txid
471  boost::multi_index::hashed_unique<mempoolentry_txid, SaltedTxidHasher>,
472  // sorted by fee rate
473  boost::multi_index::ordered_non_unique<
474  boost::multi_index::tag<descendant_score>,
475  boost::multi_index::identity<CTxMemPoolEntry>,
477  >,
478  // sorted by entry time
479  boost::multi_index::ordered_non_unique<
480  boost::multi_index::tag<entry_time>,
481  boost::multi_index::identity<CTxMemPoolEntry>,
483  >,
484  // sorted by fee rate with ancestors
485  boost::multi_index::ordered_non_unique<
486  boost::multi_index::tag<ancestor_score>,
487  boost::multi_index::identity<CTxMemPoolEntry>,
489  >
490  >
492 
522 
523  using txiter = indexed_transaction_set::nth_index<0>::type::const_iterator;
524  std::vector<std::pair<uint256, txiter>> vTxHashes GUARDED_BY(cs);
525 
527  bool operator()(const txiter &a, const txiter &b) const {
528  return a->GetTx().GetHash() < b->GetTx().GetHash();
529  }
530  };
531  typedef std::set<txiter, CompareIteratorByHash> setEntries;
532 
533  const setEntries & GetMemPoolParents(txiter entry) const EXCLUSIVE_LOCKS_REQUIRED(cs);
534  const setEntries & GetMemPoolChildren(txiter entry) const EXCLUSIVE_LOCKS_REQUIRED(cs);
535  uint64_t CalculateDescendantMaximum(txiter entry) const EXCLUSIVE_LOCKS_REQUIRED(cs);
536 private:
537  typedef std::map<txiter, setEntries, CompareIteratorByHash> cacheMap;
538 
539  struct TxLinks {
540  setEntries parents;
541  setEntries children;
542  };
543 
544  typedef std::map<txiter, TxLinks, CompareIteratorByHash> txlinksMap;
545  txlinksMap mapLinks;
546 
547  void UpdateParent(txiter entry, txiter parent, bool add);
548  void UpdateChild(txiter entry, txiter child, bool add);
549 
550  std::vector<indexed_transaction_set::const_iterator> GetSortedDepthAndScore() const EXCLUSIVE_LOCKS_REQUIRED(cs);
551 
553  std::set<uint256> m_unbroadcast_txids GUARDED_BY(cs);
554 
555 public:
556  indirectmap<COutPoint, const CTransaction*> mapNextTx GUARDED_BY(cs);
557  std::map<uint256, CAmount> mapDeltas;
558 
561  explicit CTxMemPool(CBlockPolicyEstimator* estimator = nullptr);
562 
569  void check(const CCoinsViewCache *pcoins) const;
570  void setSanityCheck(double dFrequency = 1.0) { LOCK(cs); nCheckFrequency = static_cast<uint32_t>(dFrequency * 4294967295.0); }
571 
572  // addUnchecked must updated state for all ancestors of a given transaction,
573  // to track size/count of descendant transactions. First version of
574  // addUnchecked can be used to have it call CalculateMemPoolAncestors(), and
575  // then invoke the second version.
576  // Note that addUnchecked is ONLY called from ATMP outside of tests
577  // and any other callers may break wallet's in-mempool tracking (due to
578  // lack of CValidationInterface::TransactionAddedToMempool callbacks).
579  void addUnchecked(const CTxMemPoolEntry& entry, bool validFeeEstimate = true) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
580  void addUnchecked(const CTxMemPoolEntry& entry, setEntries& setAncestors, bool validFeeEstimate = true) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
581 
582  void removeRecursive(const CTransaction& tx, MemPoolRemovalReason reason) EXCLUSIVE_LOCKS_REQUIRED(cs);
583  void removeForReorg(const CCoinsViewCache* pcoins, unsigned int nMemPoolHeight, int flags) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
584  void removeConflicts(const CTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED(cs);
585  void removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight) EXCLUSIVE_LOCKS_REQUIRED(cs);
586 
587  void clear();
588  void _clear() EXCLUSIVE_LOCKS_REQUIRED(cs); //lock free
589  bool CompareDepthAndScore(const uint256& hasha, const uint256& hashb);
590  void queryHashes(std::vector<uint256>& vtxid) const;
591  bool isSpent(const COutPoint& outpoint) const;
592  unsigned int GetTransactionsUpdated() const;
593  void AddTransactionsUpdated(unsigned int n);
598  bool HasNoInputsOf(const CTransaction& tx) const EXCLUSIVE_LOCKS_REQUIRED(cs);
599 
601  void PrioritiseTransaction(const uint256& hash, const CAmount& nFeeDelta);
602  void ApplyDelta(const uint256 hash, CAmount &nFeeDelta) const;
603  void ClearPrioritisation(const uint256 hash);
604 
606  const CTransaction* GetConflictTx(const COutPoint& prevout) const EXCLUSIVE_LOCKS_REQUIRED(cs);
607 
609  Optional<txiter> GetIter(const uint256& txid) const EXCLUSIVE_LOCKS_REQUIRED(cs);
610 
612  setEntries GetIterSet(const std::set<uint256>& hashes) const EXCLUSIVE_LOCKS_REQUIRED(cs);
613 
621  void RemoveStaged(setEntries& stage, bool updateDescendants, MemPoolRemovalReason reason) EXCLUSIVE_LOCKS_REQUIRED(cs);
622 
632  void UpdateTransactionsFromBlock(const std::vector<uint256>& vHashesToUpdate) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
633 
644  bool CalculateMemPoolAncestors(const CTxMemPoolEntry& entry, setEntries& setAncestors, uint64_t limitAncestorCount, uint64_t limitAncestorSize, uint64_t limitDescendantCount, uint64_t limitDescendantSize, std::string& errString, bool fSearchForParents = true) const EXCLUSIVE_LOCKS_REQUIRED(cs);
645 
649  void CalculateDescendants(txiter it, setEntries& setDescendants) const EXCLUSIVE_LOCKS_REQUIRED(cs);
650 
657  CFeeRate GetMinFee(size_t sizelimit) const;
658 
663  void TrimToSize(size_t sizelimit, std::vector<COutPoint>* pvNoSpendsRemaining = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs);
664 
666  int Expire(std::chrono::seconds time) EXCLUSIVE_LOCKS_REQUIRED(cs);
667 
672  void GetTransactionAncestry(const uint256& txid, size_t& ancestors, size_t& descendants) const;
673 
675  bool IsLoaded() const;
676 
678  void SetIsLoaded(bool loaded);
679 
680  unsigned long size() const
681  {
682  LOCK(cs);
683  return mapTx.size();
684  }
685 
686  uint64_t GetTotalTxSize() const
687  {
688  LOCK(cs);
689  return totalTxSize;
690  }
691 
692  bool exists(const uint256& hash) const
693  {
694  LOCK(cs);
695  return (mapTx.count(hash) != 0);
696  }
697 
698  CTransactionRef get(const uint256& hash) const;
699  TxMempoolInfo info(const uint256& hash) const;
700  std::vector<TxMempoolInfo> infoAll() const;
701 
702  size_t DynamicMemoryUsage() const;
703 
705  void AddUnbroadcastTx(const uint256& txid) {
706  LOCK(cs);
707  // Sanity Check: the transaction should also be in the mempool
708  if (exists(txid)) {
709  m_unbroadcast_txids.insert(txid);
710  }
711  }
712 
714  void RemoveUnbroadcastTx(const uint256& txid, const bool unchecked = false);
715 
717  std::set<uint256> GetUnbroadcastTxs() const {
718  LOCK(cs);
719  return m_unbroadcast_txids;
720  }
721 
723  bool IsUnbroadcastTx(const uint256& txid) const {
724  LOCK(cs);
725  return (m_unbroadcast_txids.count(txid) != 0);
726  }
727 
728 private:
742  void UpdateForDescendants(txiter updateIt,
743  cacheMap &cachedDescendants,
744  const std::set<uint256> &setExclude) EXCLUSIVE_LOCKS_REQUIRED(cs);
746  void UpdateAncestorsOf(bool add, txiter hash, setEntries &setAncestors) EXCLUSIVE_LOCKS_REQUIRED(cs);
748  void UpdateEntryForAncestors(txiter it, const setEntries &setAncestors) EXCLUSIVE_LOCKS_REQUIRED(cs);
752  void UpdateForRemoveFromMempool(const setEntries &entriesToRemove, bool updateDescendants) EXCLUSIVE_LOCKS_REQUIRED(cs);
754  void UpdateChildrenForRemoval(txiter entry) EXCLUSIVE_LOCKS_REQUIRED(cs);
755 
764  void removeUnchecked(txiter entry, MemPoolRemovalReason reason) EXCLUSIVE_LOCKS_REQUIRED(cs);
765 public:
785  class EpochGuard {
786  const CTxMemPool& pool;
787  public:
788  EpochGuard(const CTxMemPool& in);
789  ~EpochGuard();
790  };
791  // N.B. GetFreshEpoch modifies mutable state via the EpochGuard construction
792  // (and later destruction)
793  EpochGuard GetFreshEpoch() const EXCLUSIVE_LOCKS_REQUIRED(cs);
794 
803  bool visited(txiter it) const EXCLUSIVE_LOCKS_REQUIRED(cs) {
804  assert(m_has_epoch_guard);
805  bool ret = it->m_epoch >= m_epoch;
806  it->m_epoch = std::max(it->m_epoch, m_epoch);
807  return ret;
808  }
809 
811  assert(m_has_epoch_guard);
812  return !it || visited(*it);
813  }
814 };
815 
829 {
830 protected:
832 
833 public:
834  CCoinsViewMemPool(CCoinsView* baseIn, const CTxMemPool& mempoolIn);
835  bool GetCoin(const COutPoint &outpoint, Coin &coin) const override;
836 };
837 
853 // multi_index tag names
854 struct txid_index {};
855 struct insertion_order {};
856 
858  typedef boost::multi_index_container<
860  boost::multi_index::indexed_by<
861  // sorted by txid
862  boost::multi_index::hashed_unique<
863  boost::multi_index::tag<txid_index>,
866  >,
867  // sorted by order in the blockchain
868  boost::multi_index::sequenced<
869  boost::multi_index::tag<insertion_order>
870  >
871  >
873 
874  // It's almost certainly a logic bug if we don't clear out queuedTx before
875  // destruction, as we add to it while disconnecting blocks, and then we
876  // need to re-process remaining transactions to ensure mempool consistency.
877  // For now, assert() that we've emptied out this object on destruction.
878  // This assert() can always be removed if the reorg-processing code were
879  // to be refactored such that this assumption is no longer true (for
880  // instance if there was some other way we cleaned up the mempool after a
881  // reorg, besides draining this object).
882  ~DisconnectedBlockTransactions() { assert(queuedTx.empty()); }
883 
885  uint64_t cachedInnerUsage = 0;
886 
887  // Estimate the overhead of queuedTx to be 6 pointers + an allocation, as
888  // no exact formula for boost::multi_index_contained is implemented.
889  size_t DynamicMemoryUsage() const {
890  return memusage::MallocUsage(sizeof(CTransactionRef) + 6 * sizeof(void*)) * queuedTx.size() + cachedInnerUsage;
891  }
892 
893  void addTransaction(const CTransactionRef& tx)
894  {
895  queuedTx.insert(tx);
896  cachedInnerUsage += RecursiveDynamicUsage(tx);
897  }
898 
899  // Remove entries based on txid_index, and update memory usage.
900  void removeForBlock(const std::vector<CTransactionRef>& vtx)
901  {
902  // Short-circuit in the common case of a block being added to the tip
903  if (queuedTx.empty()) {
904  return;
905  }
906  for (auto const &tx : vtx) {
907  auto it = queuedTx.find(tx->GetHash());
908  if (it != queuedTx.end()) {
909  cachedInnerUsage -= RecursiveDynamicUsage(*it);
910  queuedTx.erase(it);
911  }
912  }
913  }
914 
915  // Remove an entry by insertion_order index, and update memory usage.
916  void removeEntry(indexed_disconnected_transactions::index<insertion_order>::type::iterator entry)
917  {
918  cachedInnerUsage -= RecursiveDynamicUsage(*entry);
919  queuedTx.get<insertion_order>().erase(entry);
920  }
921 
922  void clear()
923  {
924  cachedInnerUsage = 0;
925  queuedTx.clear();
926  }
927 };
928 
929 #endif // BITCOIN_TXMEMPOOL_H
std::shared_ptr< const CTransaction > CTransactionRef
Definition: transaction.h:387
CAmount GetModFeesWithAncestors() const
Definition: txmempool.h:127
size_t vTxHashesIdx
Index in mempool&#39;s vTxHashes.
Definition: txmempool.h:130
const bool spendsCoinbase
keep track of transactions that spend a coinbase
Definition: txmempool.h:73
uint64_t SipHashUint256(uint64_t k0, uint64_t k1, const uint256 &val)
Optimized SipHash-2-4 implementation for uint256.
Definition: siphash.cpp:94
Information about a mempool transaction.
Definition: txmempool.h:327
update_fee_delta(int64_t _feeDelta)
Definition: txmempool.h:168
const CTransactionRef tx
Definition: txmempool.h:67
uint64_t GetSizeWithAncestors() const
Definition: txmempool.h:126
bool m_has_epoch_guard
Definition: txmempool.h:457
CAmount nModFeesWithDescendants
... and total fees (all including us)
Definition: txmempool.h:83
void UpdateLockPoints(const LockPoints &lp)
Definition: txmempool.cpp:47
std::map< txiter, TxLinks, CompareIteratorByHash > txlinksMap
Definition: txmempool.h:544
uint64_t m_epoch
Definition: txmempool.h:456
indexed_transaction_set::nth_index< 0 >::type::const_iterator txiter
Definition: txmempool.h:523
RecursiveMutex cs_main
Mutex to guard access to validation specific variables, such as reading or changing the chainstate...
Definition: validation.cpp:124
A UTXO entry.
Definition: coins.h:30
size_t GetTxSize() const
Definition: txmempool.cpp:52
size_t GetTxWeight() const
Definition: txmempool.h:101
static void pool cs
LockPoints()
Definition: txmempool.h:49
bool operator()(const CTxMemPoolEntry &a, const CTxMemPoolEntry &b) const
Definition: txmempool.h:267
int height
Definition: txmempool.h:42
Removed in size limiting.
const unsigned int entryHeight
Chain height when entering the mempool.
Definition: txmempool.h:72
CAmount GetModFeesWithDescendants() const
Definition: txmempool.h:121
int64_t feeDelta
Definition: txmempool.h:173
uint64_t GetTotalTxSize() const
Definition: txmempool.h:686
bool operator()(const txiter &a, const txiter &b) const
Definition: txmempool.h:527
uint64_t m_epoch
epoch when last touched, useful for graph algorithms
Definition: txmempool.h:131
uint64_t GetSizeWithDescendants() const
Definition: txmempool.h:120
std::set< txiter, CompareIteratorByHash > setEntries
Definition: txmempool.h:531
void addTransaction(const CTransactionRef &tx)
Definition: txmempool.h:893
size_t vsize
Virtual size of the transaction.
Definition: txmempool.h:339
MemPoolRemovalReason
Reason why a transaction was removed from the mempool, this is passed to the notification signal...
Definition: txmempool.h:348
const uint64_t k1
Definition: txmempool.h:361
bool operator()(const CTxMemPoolEntry &a, const CTxMemPoolEntry &b) const
Definition: txmempool.h:208
bool GetSpendsCoinbase() const
Definition: txmempool.h:123
std::atomic< unsigned int > nTransactionsUpdated
Used by getblocktemplate to trigger CreateNewBlock() invocation.
Definition: txmempool.h:447
const int64_t nTime
Local time when entering the mempool.
Definition: txmempool.h:71
void UpdateAncestorState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount, int64_t modifySigOps)
Definition: txmempool.cpp:318
uint64_t nCountWithDescendants
number of descendant transactions
Definition: txmempool.h:81
int64_t lastRollingFeeUpdate
Definition: txmempool.h:453
int64_t nFeeDelta
The fee delta.
Definition: txmempool.h:342
update_descendant_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount)
Definition: txmempool.h:137
pool TrimToSize(limit, &vNoSpendsRemaining)
CTransactionRef tx
The transaction itself.
Definition: txmempool.h:330
disconnectpool queuedTx clear()
CTxMemPoolEntry stores data about the corresponding transaction, as well as data about all in-mempool...
Definition: txmempool.h:64
void GetModFeeAndSize(const T &a, double &mod_fee, double &size) const
Definition: txmempool.h:300
boost::multi_index_container< CTransactionRef, boost::multi_index::indexed_by< boost::multi_index::hashed_unique< boost::multi_index::tag< txid_index >, mempoolentry_txid, SaltedTxidHasher >, boost::multi_index::sequenced< boost::multi_index::tag< insertion_order > > > > indexed_disconnected_transactions
Definition: txmempool.h:872
int64_t CAmount
Amount in satoshis (Can be negative)
Definition: amount.h:12
bool operator()(const T &a, const T &b) const
Definition: txmempool.h:281
bool blockSinceLastRollingFeeBump
Definition: txmempool.h:454
Removed for reorganization.
indexed_disconnected_transactions queuedTx
Definition: txmempool.h:884
static const uint32_t MEMPOOL_HEIGHT
Fake height value used in Coin to signify they are only in the memory pool (since 0...
Definition: txmempool.h:35
int64_t nSigOpCostWithAncestors
Definition: txmempool.h:89
const size_t nTxWeight
... and avoid recomputing tx weight (also used for GetTxSize())
Definition: txmempool.h:69
void AddUnbroadcastTx(const uint256 &txid)
Adds a transaction to the unbroadcast set.
Definition: txmempool.h:705
void UpdateFeeDelta(int64_t feeDelta)
Definition: txmempool.cpp:40
Definition: txmempool.h:277
uint64_t nSizeWithAncestors
Definition: txmempool.h:87
int64_t feeDelta
Used for determining the priority of the transaction for mining in a block.
Definition: txmempool.h:75
Abstract view on the open txout dataset.
Definition: coins.h:180
size_t DynamicMemoryUsage() const
Definition: txmempool.h:106
unsigned int GetHeight() const
Definition: txmempool.h:103
bool exists(const uint256 &hash) const
Definition: txmempool.h:692
void removeForBlock(const std::vector< CTransactionRef > &vtx)
Definition: txmempool.h:900
#define LOCK(cs)
Definition: sync.h:220
The BlockPolicyEstimator is used for estimating the feerate needed for a transaction to be included i...
Definition: fees.h:131
const uint256 & GetHash() const
Definition: transaction.h:303
const CAmount & GetFee() const
Definition: txmempool.h:99
Removed for conflict with in-block transaction.
DisconnectedBlockTransactions.
Definition: txmempool.h:854
CTransactionRef GetSharedTx() const
Definition: txmempool.h:98
Removed for block.
mempool UpdateTransactionsFromBlock(vHashUpdate)
bool IsUnbroadcastTx(const uint256 &txid) const
Returns whether a txid is in the unbroadcast set.
Definition: txmempool.h:723
uint64_t cachedInnerUsage
sum of dynamic memory usage of all the map elements (NOT the maps themselves)
Definition: txmempool.h:451
Sort an entry by max(score/size of entry&#39;s tx, score/size with all descendants).
Definition: txmempool.h:205
CAmount nModFeesWithAncestors
Definition: txmempool.h:88
Expired from mempool.
std::chrono::seconds GetTime() const
Definition: txmempool.h:102
An outpoint - a combination of a transaction hash and an index n into its vout.
Definition: transaction.h:18
uint64_t nSizeWithDescendants
... and size
Definition: txmempool.h:82
uint256 result_type
Definition: txmempool.h:189
uint64_t GetCountWithDescendants() const
Definition: txmempool.h:119
const size_t nUsageSize
... and total memory usage
Definition: txmempool.h:70
uint64_t totalTxSize
sum of all mempool tx&#39;s virtual sizes. Differs from serialized tx size since witness data is discount...
Definition: txmempool.h:450
static size_t MallocUsage(size_t alloc)
Compute the total memory used by allocating alloc bytes.
Definition: memusage.h:50
int64_t GetSigOpCostWithAncestors() const
Definition: txmempool.h:128
const int64_t sigOpCost
Total sigop cost.
Definition: txmempool.h:74
int flags
Definition: bitcoin-tx.cpp:509
bool visited(Optional< txiter > it) const EXCLUSIVE_LOCKS_REQUIRED(cs)
Definition: txmempool.h:810
uint64_t GetCountWithAncestors() const
Definition: txmempool.h:125
256-bit opaque blob.
Definition: uint256.h:120
#define EXCLUSIVE_LOCKS_REQUIRED(...)
Definition: threadsafety.h:53
CTxMemPool stores valid-according-to-the-current-best-chain transactions that may be included in the ...
Definition: txmempool.h:443
std::map< txiter, setEntries, CompareIteratorByHash > cacheMap
Definition: txmempool.h:537
std::set< uint256 > GetUnbroadcastTxs() const
Returns transactions in unbroadcast set.
Definition: txmempool.h:717
The block chain is a tree shaped structure starting with the genesis block at the root...
Definition: chain.h:137
LockPoints lockPoints
Track the height and time at which tx was final.
Definition: txmempool.h:76
pool addUnchecked(CTxMemPoolEntry(tx, nFee, nTime, nHeight, spendsCoinbase, sigOpCost, lp))
void UpdateDescendantState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount)
Definition: txmempool.cpp:309
const CTransaction & GetTx() const
Definition: txmempool.h:97
const LockPoints & lp
Definition: txmempool.h:183
update_ancestor_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount, int64_t _modifySigOpsCost)
Definition: txmempool.h:152
int64_t GetModifiedFee() const
Definition: txmempool.h:105
unsigned int sigOpCost
boost::multi_index_container< CTxMemPoolEntry, boost::multi_index::indexed_by< boost::multi_index::hashed_unique< mempoolentry_txid, SaltedTxidHasher >, boost::multi_index::ordered_non_unique< boost::multi_index::tag< descendant_score >, boost::multi_index::identity< CTxMemPoolEntry >, CompareTxMemPoolEntryByDescendantScore >, boost::multi_index::ordered_non_unique< boost::multi_index::tag< entry_time >, boost::multi_index::identity< CTxMemPoolEntry >, CompareTxMemPoolEntryByEntryTime >, boost::multi_index::ordered_non_unique< boost::multi_index::tag< ancestor_score >, boost::multi_index::identity< CTxMemPoolEntry >, CompareTxMemPoolEntryByAncestorFee > > > indexed_transaction_set
Definition: txmempool.h:491
uint64_t nCountWithAncestors
Definition: txmempool.h:86
Fee rate in satoshis per kilobyte: CAmount / kB.
Definition: feerate.h:19
int64_t GetSigOpCost() const
Definition: txmempool.h:104
#define GUARDED_BY(x)
Definition: threadsafety.h:40
const CAmount nFee
Cached to avoid expensive parent-transaction lookups.
Definition: txmempool.h:68
bool spendsCoinbase
size_t operator()(const uint256 &txid) const
Definition: txmempool.h:366
CAmount fee
Fee of the transaction.
Definition: txmempool.h:336
static size_t RecursiveDynamicUsage(const CScript &script)
Definition: core_memusage.h:12
update_lock_points(const LockPoints &_lp)
Definition: txmempool.h:178
int64_t time
Definition: txmempool.h:43
size_t DynamicMemoryUsage() const
Definition: txmempool.h:889
The basic transaction that is broadcasted on the network and contained in blocks. ...
Definition: transaction.h:251
CCoinsView backed by another CCoinsView.
Definition: coins.h:217
boost::optional< T > Optional
Substitute for C++17 std::optional.
Definition: optional.h:14
const LockPoints & GetLockPoints() const
Definition: txmempool.h:107
CCoinsView that adds a memory cache for transactions to another CCoinsView.
Definition: coins.h:236
Sort by feerate of entry (fee/size) in descending order This is only used for transaction relay...
Definition: txmempool.h:250
const CTxMemPool & mempool
Definition: txmempool.h:831
auto it
Definition: validation.cpp:380
txlinksMap mapLinks
Definition: txmempool.h:545
Removed for replacement.
CBlockPolicyEstimator * minerPolicyEstimator
Definition: txmempool.h:448
std::chrono::seconds m_time
Time the transaction entered the mempool.
Definition: txmempool.h:333
CBlockIndex * maxInputBlock
Definition: txmempool.h:47
void GetModFeeAndSize(const CTxMemPoolEntry &a, double &mod_fee, double &size) const
Definition: txmempool.h:226
double rollingMinimumFeeRate
minimum fee to get into the pool, decreases exponentially
Definition: txmempool.h:455
CCoinsView that brings transactions from a mempool into view.
Definition: txmempool.h:828
EpochGuard: RAII-style guard for using epoch-based graph traversal algorithms.
Definition: txmempool.h:785
void removeEntry(indexed_disconnected_transactions::index< insertion_order >::type::iterator entry)
Definition: txmempool.h:916
int64_t modifySigOpsCost
Definition: txmempool.h:163
bool m_is_loaded GUARDED_BY(cs)
Definition: txmempool.h:461
bool operator()(const CTxMemPoolEntry &a, const CTxMemPoolEntry &b) const
Definition: txmempool.h:253
const CTxMemPool & pool
Definition: txmempool.h:786
RecursiveMutex cs
This mutex needs to be locked when accessing mapTx or other members that are guarded by it...
Definition: txmempool.h:520
Definition: txmempool.h:264
LockPoints lp