Hello! I am trying scince last a week , i want to build payment gateway on my ASP.NET website with square, I found here a walk through sample code but i am not succeeded , beacuse i didn't understand what is Process-Payment there in Fetch api , Then i try Git ub code that was in MVC , i am trying it in webform not in mvc, please any one can guide me how i can success ? i create nonce code successfully, but i am not able to charge card on sandbox testing,
