message: call SignalsOptInRBF instead of checking all inputs
diff: @@ -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
  