public function convertFromTo($from_fcrn_id,$to_fcrn_id,$amt,  $date,$round = 6, $source = false) {
        
        
        Yii::log("Converting from ".$this->convId2Code($from_fcrn_id)." to ".$this->convId2Code($to_fcrn_id));
        //default source - syscompany source
        if(!$source){
            $source = $this->getSysCcmpCurrencySource($date);
        }
        
        $from_rate = $this->getCurrencyRate($from_fcrn_id, $date,$source);
        if ($from_rate === FALSE) {
            return FALSE;
        }        
        
        $to_rate = $this->getCurrencyRate($to_fcrn_id, $date,$source);
        if ($to_rate === FALSE) {
            return FALSE;
        }
        
        /**
         * @todo add convert type to fcsr_courrency_source as definition
         */
        
        if ($source == self::SOURCE_BANK_RU){
            return round($to_rate*$from_rate * $amt, $round);
        } else {
             return round($to_rate/$from_rate * $amt, $round);
        }
            
    }