@verita84 @mia @terryenglish @iska
>The key difference on nostr is that clients do all the processing and on Fedi the server does all the work
Server-to-server is only a half of ActivityPub spec. There's also client-to-server: https://www.w3.org/TR/activitypub/#client-to-server-interactions
It is also possible to sign activities on the client side.