private function getDwnlLog($datestamp)
    {
        $result = [];
        /* prepare query parameters */
        $tsFrom = $this->hlpPeriod->getTimestampFrom($datestamp);
        $periodTo = $this->hlpPeriod->getPeriodCurrent();
        $tsTo = $this->hlpPeriod->getTimestampTo($periodTo);
        /* perform query */
        $query = $this->qGetChanges->build();
        $conn = $query->getConnection();
        $bind = [
            QGetChanges::BND_DATE_FROM => $tsFrom,
            QGetChanges::BND_DATE_TO => $tsTo
        ];
        $rs = $conn->fetchAll($query, $bind);
        /* compose result */
        foreach ($rs as $one) {
            $item = new EChange($one);
            $result[] = $item;
        }

        return $result;
    }