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add hyperloglog filter for counting nip22 replies to any event.

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fiatjaf 2025-04-10 23:01:48 -03:00
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45.md

@ -62,6 +62,7 @@ This NIP defines (for now) two filters eligible for HyperLogLog:
- `{"#p": ["<pubkey>"], "kinds": [3]}`, i.e. a filter for `kind:3` events with a single `"p"` tag, which means the client is interested in knowing how many people "follow" the target `<pubkey>`. In this case the `offset` will be given by reading the character at the position `32` of the hex `<pubkey>` value as a base-16 number then adding `8` to it.
- `{"#e": ["<id>"], "kinds": [7]}`, i.e. a filter for `kind:7` events with a single `"e"` tag, which means the client is interested in knowing how many people have reacted to the target event `<id>`. In this case the `offset` will be given by reading the character at the position `32` of the hex `<id>` value as a base-16 number then adding `8` to it.
- `{"#E": ["<id>"], "kinds": [1111]}`, i.e. a filter for the total number of comments any specific root event has received. In this case the `offset` will be given by reading the character at the position `32` of the hex `<id>` value as a base-16 number then adding `8` to it.
### Attack vectors