def METHOD_NAME(self, channel_id, channel_seq, buyer_pubkey, datakey_id, amount, balance, signature, details):
    """
    :param channel_id:
    :param channel_seq:
    :param buyer_pubkey:
    :param datakey_id:
    :param amount:
    :param balance:
    :param signature:
    :param details:
    :return:
    """