1  // Copyright (c) 2016-2019 The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <util/rbf.h>
 6  
 7  #include <primitives/transaction.h>
 8  
 9  bool SignalsOptInRBF(const CTransaction &tx)
10  {
11      for (const CTxIn &txin : tx.vin) {
12          if (txin.nSequence <= MAX_BIP125_RBF_SEQUENCE) {
13              return true;
14          }
15      }
16      return false;
17  }