Replying to Avatar Vitor Pamplona

They do, and I think individual scores will always be there.

But downloading 100K individual scores takes a while, uses a lot of data and space in the disk of the phone. Having ways to minimize that usage while providing some rough level of trust enables some light clients to exist.

For instance, a user search or tagging could use NIP-50 to download all the shit on relays and then filter by local bloom filters to know which users are real ones. If bloom filters are not available, then the app needs another round trip to download the individual scores of each key and discard them all when the user closes the search screen.
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david 2mo ago

Sounds like there will be lots of instances where a WoT Service Provider would want to deliver a bloom filter instead of a big list.

Big lists cause several problems:

1. Unwieldy to transmit by API; even just a slight delay could result in bad UX, depending on the use case

2. Won’t fit in a single event due to size limits

3. Slows down processing when using the list for whatever the recipient is using it for.

Any rule of thumb estimates we should keep in the back of our minds as to how big a list of pubkeys or event ids should be before we should think about delivering a bloom filter instead?

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