using System;

using System.Security.Cryptography;

using System.Text;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        const string PublicKey = "whpnsHMgiNioDB76MXXw";

        const string PrivateKey = "F1ihKTGCrPL4UVvSnMBR";

        var staging = true; //(Environment) to generate live JS_URL then change it to false

        var simulate = "true";

        var msisdn = "201063721848";

        var operatorCode = "60201";

        var lang = "en";

        var theme = "light";

        var date = DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ssZ");//"2020-03-26 17:05:00Z"; //DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ssZ");

        var fullscreen = '0';

        var liveURL="http://lookup.tpay.me/idxml.ashx/getmsisdn?";

        var stagingURL ="http://enrichment-staging.tpay.me/idxml.ashx/getmsisdn?";

        var url="";

        var jsUrl = "";

        var redirectUrl = "https://www.google.com";

        var autoRedirect = true;

        var orderId = "123";

​

        var message = date + redirectUrl + autoRedirect.ToString().ToLower() + orderId;//customerAccountNumber + msisdn + operatorCode + subscriptionPlanId.ToString() + initialPaymentproductId + initialPaymentDate + executeInitialPaymentNow.ToString().ToLower() + recurringPaymentproductId + productCatalogName + executeRecurringPaymentNow.ToString().ToLower() + contractStartDate + contractEndDate + autoRenewContract.ToString().ToLower() + (int)language;

        var theDigest = CalculateDigest(PublicKey, PrivateKey, message);

        if(staging) {

            url = stagingURL;

            jsUrl = url+"date="+date+"&redirectUrl="+redirectUrl+"&autoRedirect="+autoRedirect.ToString().ToLower()+"&orderId="+orderId+"&signature="+ theDigest+"&simulate="+simulate+

        "&operatorCode="+operatorCode +"&msisdn="+msisdn;

        }

        else {

            url = liveURL;

            jsUrl = url+"date="+date+"&redirectUrl="+redirectUrl+"&autoRedirect="+autoRedirect.ToString().ToLower()+"&orderId="+orderId+"&signature="+ theDigest;

        }

        Console.WriteLine(jsUrl);

    }

​

    public static string CalculateDigest(string publicKey, string privateKey, string message)

    {

        var digest = "";

        var hash = new System.Security.Cryptography.HMACSHA256(System.Text.Encoding.UTF8.GetBytes(privateKey));

        var correctHash = string.Join(string.Empty, hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(message)).Select(b => b.ToString("x2")));

        digest = publicKey + ":" + correctHash;

​

        return digest;

    }

}