This method will handle the Version message and
        will send a VerAck message when it receives the
        Version message.

        :param message_header: The Version message header
        :param message: The Version message

def handle_version(self, message_header, message):
        """
        This method will handle the Version message and
        will send a VerAck message when it receives the
        Version message.

        :param message_header: The Version message header
        :param message: The Version message
        """
        log.debug("handle version")
        verack = VerAck()
        log.debug("send VerAck")
        self.send_message(verack)
        self.verack = True

        # begin!
        self.send_getheaders( self.first_block_hash )