src/Helper/ChecksumHelper.php
public static function generateChecksum1(int $orderId, Money $amount, string $sharedKey, int $currency): string
    {
        $amountAsFloat = (float)$amount->getAmount() / pow(10, 2);

        // the amount needs to be formatted as a danish number, so we convert the float
        $amount = number_format($amountAsFloat, 2, ',', '');

        return strtolower(md5($orderId.'+'.$amount.'+'.$sharedKey.'+'.$currency));
    }
public static function generateChecksum1(int $orderId, Money $amount, string $sharedKey, int $currency): string
    {
        $amountAsFloat = (float)$amount->getAmount() / pow(10, 2);

        // the amount needs to be formatted as a danish number, so we convert the float
        $amount = number_format($amountAsFloat, 2, ',', '');

        return strtolower(md5($orderId.'+'.$amount.'+'.$sharedKey.'+'.$currency));
    }
@param int    $orderId
@param Money  $amount
@param string $sharedKey
@param int    $currency

@return string