getCurrency() public method

public getCurrency ( ) : string
return string
 private function calculateCouponModifier(CouponInterface $coupon, OrderInterface $order) : float
 {
     $modifierType = $coupon->getModifierType();
     $modifierValue = $coupon->getModifierValue();
     $baseCurrency = $coupon->getCurrency();
     $targetCurrency = $order->getCurrency();
     $totalGrossPrice = $order->getProductTotal()->getGrossPrice();
     if ('%' === $modifierType) {
         return $modifierValue / 100;
     }
     if ('-' === $modifierType) {
         $modifierValue = $this->currencyHelper->convert($modifierValue, $baseCurrency, $targetCurrency);
         return $modifierValue >= $totalGrossPrice ? 1 : $modifierValue / $totalGrossPrice;
     }
     return 1;
 }
 /**
  * Calculates the modifier's value according to current currency and coupon's modifier
  *
  * @param CouponInterface $coupon
  * @param float|int       $amount
  * @param string          $targetCurrency
  *
  * @return float|int
  */
 protected function calculateModifierValue(CouponInterface $coupon, $amount, $targetCurrency)
 {
     $modifierType = $coupon->getModifierType();
     $modifierValue = $coupon->getModifierValue();
     $baseCurrency = $coupon->getCurrency();
     switch ($modifierType) {
         case '-':
             $modifierValue = $this->currencyHelper->convert($modifierValue, $baseCurrency, $targetCurrency);
             $modifier = $modifierValue >= $amount ? 1 : $modifierValue / $amount;
             break;
         case '%':
             $modifier = $modifierValue / 100;
             break;
         default:
             $modifier = 0;
     }
     return $modifier;
 }