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nip42.ts
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nip42.ts
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import {Kind, type EventTemplate, type Event} from './event.ts'
import {Relay} from './relay.ts'
/**
* Authenticate via NIP-42 flow.
*
* @example
* const sign = window.nostr.signEvent
* relay.on('auth', challenge =>
* authenticate({ relay, sign, challenge })
* )
*/
export const authenticate = async ({
challenge,
relay,
sign
}: {
challenge: string
relay: Relay
sign: <K extends number = number>(
e: EventTemplate<K>
) => Promise<Event<K>> | Event<K>
}): Promise<void> => {
const e: EventTemplate = {
kind: Kind.ClientAuth,
created_at: Math.floor(Date.now() / 1000),
tags: [
['relay', relay.url],
['challenge', challenge]
],
content: ''
}
return relay.auth(await sign(e))
}