VideoRentalService.RentalService.HireMovie C# (CSharp) Method

        public int HireMovie(int staffid, int customerid, int rentalid, double paymentAmount, string creditcardno, string expiry, string cvv)
        {
            int transactionID = -1;
            CreditCardServiceClient cc = new CreditCardServiceClient();
            transactionID = cc.Debit(creditcardno, paymentAmount);
            if (transactionID != -1)
            {
                df.PayForMovie((byte)staffid, (byte)customerid, (byte)rentalid, paymentAmount);
            }
            return transactionID;
        }