What happens if my server doesn't respond to a WebHook?
I'm studying how to implement a rather simple payment solution, and seeing that PayPal uses webhooks relieves me, because it makes the database interaction somehow simpler.
Still I can't find on the documentation what actually happens if a request to my callback server fails. As these are payment transactions, it's rather important to keep track of them all, or otherwise to notify an administrator if somehting goes wrong.
Can anyone elaborate how this works? I read that mailchimp has a cool interface that lets you see the failed requests, and keeps them in memory. Does PayPal have that too?