def METHOD_NAME(self, block_slot: int, tx_idx: int) -> Optional[NeonTxReceiptInfo]:
    request = self._base_request_hdr + '''
         WHERE a.block_slot = %s
           AND a.tx_idx = %s
    '''
    value_list = self._db.fetch_one(request, (block_slot, tx_idx))
    return self._tx_from_value(value_list)