NIP-29 unleashed

[pablof7z]

@fiatjaf told me to stop mocking him about his RPC shitcoining, so here's a wip that everyone will hate.

This just removes all the RPC stuff from NIP-29, instead admins publish group state and, fi the relay accepts it, ti resigns the same payload with it. This also opens the door for arbitrary group state which will make NIP-29 more usable.

cc @fiatjaf @staab @verbiricha

[staab]

Better, but still more special behavior than seems necessary. What about instead of having relays re-sign the group meta, relays just drop all but the last valid group meta? The canonical event would be the one that is served, rather than signed, but since the relay is trusted there's not really any difference. This still wouldn't make group meta work on unsupported groups, because members could then hijack a group by making themselves admins.

[pablof7z]

Better, but still more special behavior than seems necessary. What about instead of having relays re-sign the group meta, relays just drop all but the last valid group meta? The canonical event would be the one that is served, rather than signed, but since the relay is trusted there's not really any difference. This still wouldn't make group meta work on unsupported groups, because members could then hijack a group by making themselves admins.

yeah, I like it.

To work in non NIP-29 relays client would need to know who's group they're loading and include authors for the admins they know of, i.e. load with kinds:[39001], "#d": ['flotilla'], authors: ['hodlbod'] get the pubkeys authorized by hodlbod as admins of flotilla and use those pubkeys on the authors for the group state.

I think that would be cool but I don't want to deviate so much, getting rid of the RPC would already be a big win.

[staab]

Yeah, that logic would be pretty hairy if you were to validate change of admins over time properly. But it's not impossible, and I think this PR leaves that possibility open.

[staab]

Oh, nevermind, because timestamps can be forged if relays don't validate them. Eh, still, maybe.