code: def addToPrepares(self, prepare: Prepare, sender: str):
          
          # BLS multi-sig:
          self._bls_bft_replica.process_prepare(prepare, sender)
  
          self.prepares.addVote(prepare, sender)
          self.dequeue_commits(prepare.viewNo, prepare.ppSeqNo)
          self.tryCommit(prepare)
docs: Add the specified PREPARE to this replica's list of received
          PREPAREs and try sending COMMIT
  
          :param prepare: the PREPARE to add to the list