I searched all the time and could not find any documentation that says why you need to use express check or REST api?
Can someone please tell me the difference between the two?
I need to implement an online payment gateway for a user to buy a plan, and then continue to use the application online (more like a service).
With express verification, I found the Physical and Digital categories. I do not provide any products to users (there is no online store in my application).
What should I choose? Please, help.
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