nips/85.md

NIP-85

Trusted Assertions

draft optional

Certain calculations in Nostr require access to the entire dataset of events and are impossible to do directly by Clients. This NIP allows the creation of services that can perform such calculations and output signed events for each result continuously. Each calculation type receives a separate event kind. Users can set up which service providers they trust to perform these calculations so that Clients can load and display the results accordingly.

Assertions are always addressable events with the d tag pointing to the subject of the assertion. The following kinds and tags have been specified:

name	kind	d tag value	result tags
Follower Count	30382	target pubkey	"followers" (integer)
WebOfTrust Score	30382	target pubkey	"wot" (integer, normalized 0-100)
Zap Amount Received	30382	target pubkey	"zap_amt_recd" (integer, millisats)
Zap Amount Sent	30382	target pubkey	"zap_amt_sent" (integer, millisats)
Zap Number Received	30382	target pubkey	"zap_num_recd" (integer, evt counter)
Zap Number Sent	30382	target pubkey	"zap_num_sent" (integer, evt counter)

Example:

{
  "kind": 30382,
  "tags": [
    ["d", "e88a691e98d9987c964521dff60025f60700378a4879180dcbbb4a5027850411"],
    ["wot", "89"],
    ["zap_amt_sent", "1000000"],
  ],
  "content": "",
  //...
}

Service providers SHOULD update their results constantly and MAY limit access by using paid relays.

Declaring Trusted Service Providers

Kind 10040 lists the user's authorized providers for each service. The service tag is followed by the pubkey of the service and the relay where the results are published.

{
  "kind": 10040,
  "tags": [
    ["wot", "818a39b5f164235f86254b12ca586efccc1f95e98b45cb1c91c71dc5d9486dda", "wss://relay.nostr.band"],
    ["wot", "3d842afecd5e293f28b6627933704a3fb8ce153aa91d790ab11f6a752d44a42d", "wss://nostr.wine"],
    ["zap_amt_sent", "818a39b5f164235f86254b12ca586efccc1f95e98b45cb1c91c71dc5d9486dda", "wss://relay.nostr.band"],
  ],
  "content": "",
  //...
}

Clients should download this list, and load and display assertions when appropriate.