How To Detect Canceled Or Refunded Order For Google In-app Billing?

I have red a lot of posts and Google documents, but am still not clear how to tell an in-app purchase has been refunded. I have red carefully In-App Billing v3 - Don't detect refun

Solution 1:

Have you checked out the voided purchase list API? It returns a list of cancelled, refunded or charged-back purchases.

https://developers.google.com/android-publisher/api-ref/purchases/voidedpurchases/list

Solution 2:

Scrape the Google Console. That's what I do.