Jon Staab
55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
import {fetchJson} from "@welshman/lib"
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import type {Maybe} from "@welshman/lib"
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import {displayRelayUrl, displayRelayProfile} from "@welshman/util"
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import type {RelayProfile} from "@welshman/util"
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import {LoadableMapPlugin} from "./base.js"
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import type {Projection} from "./base.js"
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/**
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* NIP-11 relay profiles, keyed by url. A "local" loadable collection: items
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* aren't nostr events, they're fetched over HTTP from each relay.
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*/
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export class Relays extends LoadableMapPlugin<RelayProfile> {
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fetch = async (url: string): Promise<Maybe<RelayProfile>> => {
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try {
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const json = await fetchJson(url.replace(/^ws/, "http"), {
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headers: {
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Accept: "application/nostr+json",
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},
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})
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if (json) {
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const info = {...json, url} as RelayProfile
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if (!Array.isArray(info.supported_nips)) {
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info.supported_nips = []
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}
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info.supported_nips = info.supported_nips.map(String)
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this.set(url, info)
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return info
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}
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} catch (e) {
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// pass
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}
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}
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display = (url: string): Projection<string> =>
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this.project(url, $relay => displayRelayProfile($relay, displayRelayUrl(url)))
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hasNegentropy = async (url: string) => {
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const relay = await this.load(url)
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if (relay?.negentropy) return true
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if (relay?.supported_nips?.includes("77")) return true
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if (relay?.software?.includes?.("strfry") && !relay?.version?.match(/^0\./)) return true
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return false
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}
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hasNip = async (url: string, nip: number | string) =>
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(await this.load(url))?.supported_nips?.includes(String(nip)) ?? false
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}
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