Jon Staab
82 lines
2.2 KiB
TypeScript
82 lines
2.2 KiB
TypeScript
import {derived} from "svelte/store"
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import {ctx, memoize, omit, equals, assoc} from "@welshman/lib"
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import {createEvent} from "@welshman/util"
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import {withGetter, synced} from "@welshman/store"
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import {type Nip46Handler} from "@welshman/signer"
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import {Nip46Broker, Nip46Signer, Nip07Signer, Nip01Signer} from "@welshman/signer"
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export type Session = {
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method: string
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pubkey: string
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token?: string
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secret?: string
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handler?: Nip46Handler
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}
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export const pubkey = withGetter(synced<string | null>("pubkey", null))
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export const sessions = withGetter(synced<Record<string, Session>>("sessions", {}))
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export const session = withGetter(
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derived([pubkey, sessions], ([$pubkey, $sessions]) => ($pubkey ? $sessions[$pubkey] : null)),
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)
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export const getSession = (pubkey: string) => sessions.get()[pubkey]
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export const addSession = (session: Session) => {
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sessions.update(assoc(session.pubkey, session))
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pubkey.set(session.pubkey)
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}
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export const putSession = (session: Session) => {
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if (!equals(getSession(session.pubkey), session)) {
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sessions.update(assoc(session.pubkey, session))
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}
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}
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export const updateSession = (pubkey: string, f: (session: Session) => Session) =>
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putSession(f(getSession(pubkey)))
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export const dropSession = (pubkey: string) =>
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sessions.update($sessions => omit([pubkey], $sessions))
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export const nip46Perms = "sign_event:22242,nip04_encrypt,nip04_decrypt,nip44_encrypt,nip44_decrypt"
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export const getSigner = memoize((session: Session) => {
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switch (session?.method) {
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case "nip07":
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return new Nip07Signer()
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case "nip01":
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return new Nip01Signer(session.secret!)
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case "nip46":
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return new Nip46Signer(Nip46Broker.get(session.pubkey, session.secret!, session.handler!))
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default:
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return null
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}
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})
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export const signer = withGetter(derived(session, getSigner))
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export const authChallenges = new Set()
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export const onAuth = async (url: string, challenge: string) => {
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if (authChallenges.has(challenge) || !signer.get()) {
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return
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}
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authChallenges.add(challenge)
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const event = await signer.get()!.sign(
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createEvent(22242, {
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tags: [
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["relay", url],
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["challenge", challenge],
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],
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}),
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)
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ctx.net.pool.get(url).send(["AUTH", event])
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return event
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}
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