Add NIP-18 utils

nip18.test.js

@@ -0,0 +1,101 @@
+/* eslint-env jest */
+
+const {nip18, finishEvent, getPublicKey, Kind} = require('./lib/nostr.cjs')
+
+describe('finishRepostEvent + getRepostedEventPointer + getRepostedEvent', () => {
+  const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+  const relayUrl = 'https://relay.example.com'
+
+  const publicKey = getPublicKey(privateKey)
+
+  const repostedEvent = finishEvent({
+    kind: Kind.Text,
+    tags: [
+      ['e', 'replied event id'],
+      ['p', 'replied event pubkey'],
+    ],
+    content: 'Replied to a post',
+    created_at: 1617932115
+  }, privateKey)
+
+  it('should create a signed event from a minimal template', () => {
+    const template = {
+      created_at: 1617932115
+    }
+
+    const event = nip18.finishRepostEvent(template, repostedEvent, relayUrl, privateKey)
+
+    expect(event.kind).toEqual(Kind.Repost)
+    expect(event.tags).toEqual([
+      [
+        'e',
+        repostedEvent.id,
+        relayUrl,
+      ],
+      [
+        'p',
+        repostedEvent.pubkey,
+      ],
+    ])
+    expect(event.content).toEqual(JSON.stringify(repostedEvent))
+    expect(event.created_at).toEqual(template.created_at)
+    expect(event.pubkey).toEqual(publicKey)
+    expect(typeof event.id).toEqual('string')
+    expect(typeof event.sig).toEqual('string')
+
+    const repostedEventPointer = nip18.getRepostedEventPointer(event)
+
+    expect(repostedEventPointer.id).toEqual(repostedEvent.id)
+    expect(repostedEventPointer.author).toEqual(repostedEvent.pubkey)
+    expect(repostedEventPointer.relays).toEqual([ relayUrl ])
+
+    const repostedEventFromContent = nip18.getRepostedEvent(event)
+
+    expect(repostedEventFromContent).toEqual(repostedEvent)
+  })
+
+  it('should create a signed event from a filled template', () => {
+    const template = {
+      tags: [
+        ['nonstandard', 'tag'],
+      ],
+      content: '',
+      created_at: 1617932115
+    }
+
+    const event = nip18.finishRepostEvent(template, repostedEvent, relayUrl, privateKey)
+
+    expect(event.kind).toEqual(Kind.Repost)
+    expect(event.tags).toEqual([
+      [
+        'nonstandard',
+        'tag',
+      ],
+      [
+        'e',
+        repostedEvent.id,
+        relayUrl,
+      ],
+      [
+        'p',
+        repostedEvent.pubkey,
+      ],
+    ])
+    expect(event.content).toEqual('')
+    expect(event.created_at).toEqual(template.created_at)
+    expect(event.pubkey).toEqual(publicKey)
+    expect(typeof event.id).toEqual('string')
+    expect(typeof event.sig).toEqual('string')
+
+    const repostedEventPointer = nip18.getRepostedEventPointer(event)
+
+    expect(repostedEventPointer.id).toEqual(repostedEvent.id)
+    expect(repostedEventPointer.author).toEqual(repostedEvent.pubkey)
+    expect(repostedEventPointer.relays).toEqual([ relayUrl ])
+
+    const repostedEventFromContent = nip18.getRepostedEvent(event)
+
+    expect(repostedEventFromContent).toEqual(undefined)
+  })
+})