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@thisismissem Probably! What sort were you thinking of?

@mauve like flooding peoples timelines with the backfilling of posts

@thisismissem I assumed timelines would sort by published time no? I'm gonna run some tests before deploying this to production ofc

@mauve I think there's a bug to the contrary

@thisismissem In mastodon? i'd love to see the source code for it if you know what part of it it'd be in.

@mauve I don't have it off top of my head but follow from /app/lib/activitypub/activity/create.rb

@thisismissem It seems to be taking the created_at part out at least. https://github.com/mastodon/mastodon/blob/main/app/lib/activitypub/activity/create.rb#L122C7-L122C17

I'll look more after testing. Gonna let my personal instance take the bulk o9f the damage :P

@mauve yeah, I've heard of like, birdsite bridge that did similar backfilling clogging up people's timelines, but that might be specific to that implementation.

@thisismissem @mauve so... imo the ActivityPub way of doing this is to publish your last X posts at an "outbox" endpoint specified in your profile. Then a remote server following you can parse the outbox and get some content to fill things with. I did this with some software I was building and Mastodon just... didn't grab any of the outbox posts and I was confused as to why not

@darius @thisismissem @mauve yeah the outbox is there to support "web browser" use cases, fetch the latest activities and page through to see history

the thing with mastodon and timeline sorting is that the timeline sorting algorithm isn't using creation date, it's using arrival date. this is so someone can't create a post set in the far future to have it pinned at the top of your timeline.

@trwnh @darius @mauve tbh, I'd think it'd be entirely reasonable to reject activities that are not within 15 minutes or so of the current server time.

@thisismissem @darius @mauve this is a good way to have data loss from time zone related issues

i think mastodon has a window of 12 hours for HTTP signatures for this reason