Examples of md5 checksum signature calculation for ReferralCandy advanced integration

MD5Example.java

import java.util.*;
import java.lang.*;
import java.io.*;
import java.security.*;
import java.math.*;

class MD5Example
{
  public static void main (String[] args) throws java.lang.Exception
  {
    String email = "[email protected]";
    String firstName = "Joe";
    String purchaseAmount = "2.60";
    String purchaseTimestamp = "1441692412"; // epoch time in seconds
    String secretKey = "f88346aa80c044a8b5c4f291d00ba555";
    
    String data = String.join(",", email, firstName, purchaseAmount, 
                                   purchaseTimestamp, secretKey);
    
    MessageDigest md = MessageDigest.getInstance("MD5");
      byte[] md5 = md.digest(data.getBytes());
      String signature = String.format("%032x", new BigInteger(1, md5));
    
      System.out.println(data); 
      //Output: [email protected],Joe,2.60,1441692412,f88346aa80c044a8b5c4f291d00ba555
      
      System.out.println(signature);
      //Output: f1fcf14e6c9af07f90eb9364dc3dc8f4
  }
}