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call SignalsOptInRBF instead of checking all inputs

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This commit is contained in:
glozow 2021-08-20 13:01:07 +01:00
parent e0df41d7d5
commit badb9b11a6
2 changed files with 10 additions and 20 deletions
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11
src/util/rbf.h
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@ -11,8 +11,15 @@ class CTransaction;
static const uint32_t MAX_BIP125_RBF_SEQUENCE = 0xfffffffd;
// Check whether the sequence numbers on this transaction are signaling
// opt-in to replace-by-fee, according to BIP 125
/** Check whether the sequence numbers on this transaction are signaling
* opt-in to replace-by-fee, according to BIP 125.
* Allow opt-out of transaction replacement by setting
* nSequence > MAX_BIP125_RBF_SEQUENCE (SEQUENCE_FINAL-2) on all inputs.
*
* SEQUENCE_FINAL-1 is picked to still allow use of nLockTime by
* non-replaceable transactions. All inputs rather than just one
* is for the sake of multi-party protocols, where we don't
* want a single party to be able to disable replacement. */
bool SignalsOptInRBF(const CTransaction &tx);
#endif // BITCOIN_UTIL_RBF_H

19
src/validation.cpp
View file

@ -605,14 +605,6 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws)
}
if (!setConflicts.count(ptxConflicting->GetHash()))
{
// Allow opt-out of transaction replacement by setting
// nSequence > MAX_BIP125_RBF_SEQUENCE (SEQUENCE_FINAL-2) on all inputs.
//
// SEQUENCE_FINAL-1 is picked to still allow use of nLockTime by
// non-replaceable transactions. All inputs rather than just one
// is for the sake of multi-party protocols, where we don't
// want a single party to be able to disable replacement.
//
// Transactions that don't explicitly signal replaceability are
// *not* replaceable with the current logic, even if one of their
// unconfirmed ancestors signals replaceability. This diverges
@ -620,16 +612,7 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws)
// Applications relying on first-seen mempool behavior should
// check all unconfirmed ancestors; otherwise an opt-in ancestor
// might be replaced, causing removal of this descendant.
bool fReplacementOptOut = true;
for (const CTxIn &_txin : ptxConflicting->vin)
{
if (_txin.nSequence <= MAX_BIP125_RBF_SEQUENCE)
{
fReplacementOptOut = false;
break;
}
}
if (fReplacementOptOut) {
if (!SignalsOptInRBF(*ptxConflicting)) {
return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "txn-mempool-conflict");
}