    def get_metadata(self, txn_ids):
        """Return a list of metadata that match the transaction ids (txn_ids)

        Args:
            txn_ids (:obj:`list` of :obj:`str`): A list of txn_ids to
                retrieve from the database.

        Returns:
            list: The list of metadata returned from the database.
        """
        return backend.query.get_metadata(self.connection, txn_ids)
Return a list of metadata that match the transaction ids (txn_ids)

Args:
txn_ids (:obj:`list` of :obj:`str`): A list of txn_ids to
retrieve from the database.

Returns:
list: The list of metadata returned from the database.
bigchaindb/lib.py