I think this is absolutely correct time to ask something to the people who have worked on this kinda integration. Currently we have a PSP which gives a webhook on successful payment. The challenge here is once I receive webhook (which is a stateless POST request to one of our server) we want to attach it to a browser with an open websocket connection. I have to make a redirect now what do you think is an ideal way to make it? Currently I am posting it directly to the notify page which is waiting for success/failure response. But the problem here is I don't have any mechanism through which I could make a post request directly with the browser context as well as redirect without explicit post(which ofcourse displays payload - think success/fail response). Can you provide a better way for handling the redirect here with form post?

To make things more clear we have our client which wants to display a QR hosted on a different service where it comes via http redirect on requesting one of the server API - then this service gets the webhook & it has to redirect back to the client again with the payment status/webhook response.