Jici
2
There’s nothing visible for user in backend WF itself.
However, the return url will contain a visible transaction token when used… So is there really an issue to pass it from frontend?
Also, I don’t think you should use the return_url to validate that a TX is successfull. You could use it to pass a TX ID and validate the status when the user come back (but with the callback url, the should be sent to a Backend/API Workflow, this shouldn’t be an issue and you should use that to update the TX status).