Random thought. maybe bloom filters could be space efficient way to handle the filtering use case? I don't know much about them but AI says they are used to prove an ID is within a set
I'm not too worried about the server lying, since ideally users could choose their provider or maybe run their own.
The way I see it there are two uses for pagerank or "WoT"
1. The client wants to hide content that is outside of the users social network (subjective distance or score)
I'm not sure how this could work without the server sending the whole graph (probably Mb of data) or the client making API requests to check each pubkey (not great for privacy)
For this case I think the simple kind:3 WoT is good enough, at least for now
2. The client wants to sort events or pubkeys by "reputation" or score
Vertex already does this well for user search ( query -> pubkey[] ) but it may be useful to have some kind of generic sorting method for events to allow a client to sort replies ( again probably bad for privacy )
I tend to agree with nostr:npub1jlrs53pkdfjnts29kveljul2sm0actt6n8dxrrzqcersttvcuv3qdjynqn. I want my client to work without a dependency on a server. but I'd also like to integrate with some kind of server to improve performance or to get better sorting / filtering results
Discussion
I think for 1. and 2. RankProfiles is a solid approach
https://vertexlab.io/docs/services/rank-profiles/
Let's go through the case with replies:
- user clicks on a note
- client loads all replies for that note
- extract the pubkeys of these replies
- client asks Vertex for the ranks of up-to 1000 pubkeys in a single call, with the user's preferred algorithm
- client hides replies from npubs with rank lower than the user's preferred threshold
- client ranks the other replies by their rank (or a custom formula like rank * zap amount).
It's an interesting idea but I don't see where exactly in the client you would need it.
- for the feed one uses follows
- for the replies, because on the relatively low number one can use the ranks directly (giving the user the ability to set a threshold).
Bloom filters are superior to RankProfiles when you are dealing with +10k pubkeys (not in the follow-list of the user) I think.
Am I missing something?
I think your right, the only other one off use case I could think of where the client would need a filter instead of sorting would be if they wanted hide zaps / reactions or browser "global" on a relay. but none of those are things I'm trying to implement :)
Do u mean zaps and reactions in the users notifications?
I think that too can be done using RankProfiles. It's unlikely one has thousands of notifications, but not impossible if its targeted by an attacker