using System;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        // Example JSON body

        string jsonString = "{\"id\":79120,\"key\":\"GBdTg6UJXwF37nCb\",\"username\":\"PtechTRY PtechTRY\",\"user_id\":8101670,\"amount\":50,\"status\":\"APPROVED\",\"token\":\"8E379C57-DA31-4A6E-96EC-6C0A9670E2BB\",\"method\":\"papara\",\"date\":{\"date\":\"2024-06-29 11:18:17.709919\",\"timezone_type\":3,\"timezone\":\"UTC\"},\"type\":\"DEPOSIT\",\"message\":null}";

​

        // Example secret key

        //string secretKey = "KEbq_wG@5x?;\"Btk";

        string secretKey = "a.eUr>C9EY8Hmb3MAfP%[t";

​

        // Compute HMAC-SHA256 hash

        byte[] hash;

        using (HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(secretKey)))

        {

            hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(jsonString));

        }

​

        // Convert hash to lowercase hexadecimal string

        string hashHex = BitConverter.ToString(hash).Replace("-", "").ToLower();

​

        // Encode hash to base64

        string base64EncodedHash = Base64Encode(hashHex);

​

        Console.WriteLine(base64EncodedHash);

    }

​

    public static string Base64Encode(string plainText)

    {

        var plainTextBytes = Encoding.UTF8.GetBytes(plainText);

        return Convert.ToBase64String(plainTextBytes);

    }

}

​