Sometimes servers are going down. At Friendica we do have an option to do a backup - and to restore it on another server. We are then sending some relocation message to the known contacts, so that they will change the address to the new host.
Question is, how we can do this with ActivityPub as well. Problem is that the old server needn’t to be available at the moment of relocation. So we need some way that the receiver can be sure that everything is alright.
Since most accounts on Friendica have “manuallyApprovesFollowers” activated, it would be good when the contact requests needn’t to be done again.
Does someone do have an idea, how to do this?