I have a Saved button created with return ULS enabled and with advance variables. When the customer returns to the merchant site after the successful payment, I can use Payment Data Transfer (PDT) method to get the details of the transaction. 1. Are the advance variables which are created with Buy now button is available with the response of PDT? 2. Can I use the REST API to get the transaction details at this point using transaction number (tx URL parameter)? 3. If the answer for the above 3 is YES, what is the API that support this?
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