Jon Staab
72 lines
2.6 KiB
TypeScript
72 lines
2.6 KiB
TypeScript
import type {Event, EventTemplate, UnsignedEvent} from 'nostr-tools'
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export type {Event, EventTemplate, UnsignedEvent} from 'nostr-tools'
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import {verifyEvent, getEventHash} from 'nostr-tools'
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import {cached, now} from '@coracle.social/lib'
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import {Tags} from './Tags'
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import {addressFromEvent, encodeAddress} from './Address'
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import {isEphemeralKind, isReplaceableKind, isPlainReplaceableKind, isParameterizedReplaceableKind} from './Kinds'
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export type Rumor = Pick<Event, 'kind' | 'tags' | 'content' | 'created_at' | 'pubkey' | 'id'> & {
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wrap?: Event
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}
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export type CreateEventOpts = {
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content?: string
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tags?: string[][]
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created_at?: number
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}
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export const createEvent = (kind: number, {content = "", tags = [], created_at = now()}: CreateEventOpts) =>
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({kind, content, tags, created_at})
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export const asEventTemplate = ({kind, tags, content, created_at}: EventTemplate): EventTemplate =>
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({kind, tags, content, created_at})
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export const asUnsignedEvent = ({kind, tags, content, created_at, pubkey}: UnsignedEvent): UnsignedEvent =>
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({kind, tags, content, created_at, pubkey})
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export const asRumor = ({kind, tags, content, created_at, pubkey, id}: Rumor): Rumor =>
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({kind, tags, content, created_at, pubkey, id})
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export const asEvent = ({kind, tags, content, created_at, pubkey, id, sig}: Event): Event =>
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({kind, tags, content, created_at, pubkey, id, sig})
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export const hasValidSignature = cached<string, boolean, [Event]>({
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maxSize: 10000,
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getKey: ([e]: [Event]) => {
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try {
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return [getEventHash(e), e.sig].join(":")
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} catch (err) {
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return 'invalid'
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}
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},
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getValue: ([e]: [Event]) => {
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try {
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return verifyEvent(e)
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} catch (err) {
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return false
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}
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},
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})
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export const getAddress = (e: UnsignedEvent) => encodeAddress(addressFromEvent(e))
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export const getIdOrAddress = (e: Rumor) => isReplaceable(e) ? getAddress(e) : e.id
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export const getIdAndAddress = (e: Rumor) => isReplaceable(e) ? [e.id, getAddress(e)] : [e.id]
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export const isEphemeral = (e: EventTemplate) => isEphemeralKind(e.kind)
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export const isReplaceable = (e: EventTemplate) => isReplaceableKind(e.kind)
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export const isPlainReplaceable = (e: EventTemplate) => isPlainReplaceableKind(e.kind)
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export const isParameterizedReplaceable = (e: EventTemplate) => isParameterizedReplaceableKind(e.kind)
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export const isChildOf = (child: EventTemplate, parent: Rumor) => {
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const {roots, replies} = Tags.fromEvent(child).ancestors()
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const parentIds = (replies.exists() ? replies : roots).values().valueOf()
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return getIdAndAddress(parent).some(x => parentIds.includes(x))
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}
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