src/Money.php
public function getRoundedAmount(): float
    {
        $fractionDigits = Intl::getCurrencyBundle()->getFractionDigits($this->currency);
        $roundingIncrement = Intl::getCurrencyBundle()->getRoundingIncrement($this->currency);

        $value = round($this->amount, $fractionDigits);

        // Swiss rounding
        if (0 < $roundingIncrement && 0 < $fractionDigits) {
            $roundingFactor = $roundingIncrement / pow(10, $fractionDigits);
            $value = round($value / $roundingFactor) * $roundingFactor;
        }

        return $value;
    }
public function getRoundedAmount(): float
    {
        $fractionDigits = Intl::getCurrencyBundle()->getFractionDigits($this->currency);
        $roundingIncrement = Intl::getCurrencyBundle()->getRoundingIncrement($this->currency);

        $value = round($this->amount, $fractionDigits);

        // Swiss rounding
        if (0 < $roundingIncrement && 0 < $fractionDigits) {
            $roundingFactor = $roundingIncrement / pow(10, $fractionDigits);
            $value = round($value / $roundingFactor) * $roundingFactor;
        }

        return $value;
    }
Returns the amount rounded to the correct number of decimal places for that currency