And also, what kind of activity am I supposed to look for to know when someone's avatar was updated?
@grishka probably an update activity with the actor as an object.
I don't think that anyone exposes plain avatar images as activitypub addressable objects for which case you would receive an update for the avatar itself.
Gregory's Server
@grishka probably an update activity with the actor as an object.
I don't think that anyone exposes plain avatar images as activitypub addressable objects for which case you would receive an update for the avatar itself.