TWA guide should mention Chrome cache and refer to App Signature

[mbuechse]

There is extensive documentation on Trusted Web Activities (somewhat too extensive for my taste). I am referring to

Page Affected: https://developers.google.com/web/updates/2019/02/using-twa and https://developers.google.com/web/updates/2019/08/twas-quickstart

These pages showed me how to create a Digital Asset Link and how to test it. I followed it closely and therefore made two consequential mistakes:

• I used the upload certificate's fingerprint instead of the app certificate's fingerprint in assetlinks.json. (The app certificate's fingerprint can be viewed in Play Console.)
• I rectified that mistake, but the URL bar still wouldn't vanish. I tried every debugging technique mentioned and then some, to no avail, only to finally realize that Chrome used a cached assetlinks.json (as opposed to Android itself?).

What needs to be done?

• [ ] Refer to the app certificate.
• [ ] Mention that assetlinks.json is being cached by Chrome.

[mbuechse]

Needless to say, my problem was gone when I cleared Chrome's cache in the privacy settings.