The biggest problem for peer to peer ActivityPub is the fact that ActivityPub is primarily a "pull" protocol. You need to fetch a remote actor before interacting with it. This is not feasible in the environment where nodes are intermittently online.

What if we used a special activity to request objects? I've described this idea in more detail in Asynchronous object retrieval:

https://codeberg.org/silverpill/feps/src/branch/main/aef6/fep-aef6.md

I think this mechanism, if combined with self-authenticating objects, should make ActivityPub compatible with store and forward protocols.

#p2p #dtn #fep_ef61