Function to Calculate the 1.5% ZawadiPay Discount

Utilities.java

public class Utilities {
    public Utilities(){}
  
    public static void launchMpesa(String phoneNumber,Float amount){
      
        //Calculate Discount
        Double newDiscAmt=(1 - 0.015)*amount;
      
        //Send Mpesa checkout with sendMpesaCheckout method defined elsewhere based on daraja API
        //Metadata CAN BE the MerchantID to be returned to the callback
        sendMpesaCheckout (PRODUCT_NAME, phoneNumber,CURRENCY_CODE, newDiscAmt.floatValue(), metadata);

    }
}