class TransportUpgrader(object):

    def __init__(self, secOpt, muxerOpt):
        self.sec = secOpt
        self.muxer = muxerOpt

    def upgrade_listener(self, transport, listeners):
        """
        upgrade multiaddr listeners to libp2p-transport listeners

        """
        pass
        
    def upgrade_security(self):
        pass

    def upgrade_connection(self, conn):
        """
        upgrade raw connection to muxed connection
        """
        # For PoC, no security
        # Default to mplex
        pass