bump to v1.8.0

* add more test cases for event file

* add another test case for event file

* edit filter.test.js and add more test cases

.github/workflows/npm-publish.yml

@@ -12,9 +12,11 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: 18
-      - run: yarn --ignore-engines
+      - uses: extractions/setup-just@v1
-      - run: node build.js
+      - run: just install-dependencies
-      - run: yarn test
+      - run: just build
+      - run: just test
+      - run: just emit-types
       - uses: JS-DevTools/npm-publish@v1
         with:
           token: ${{ secrets.NPM_TOKEN }}

.github/workflows/test.yml

@@ -3,15 +3,17 @@ on:
   push:
     branches:
       - master
+  pull_request:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: 18
-      - run: yarn --ignore-engines
+      - uses: extractions/setup-just@v1
-      - run: node build.js
+      - run: just install-dependencies
-      - run: yarn test
+      - run: just build
+      - run: just test

README.md

@@ -2,7 +2,13 @@
 
 Tools for developing [Nostr](https://github.com/fiatjaf/nostr) clients.
 
-Very lean on dependencies.
+Only depends on _@scure_ and _@noble_ packages.
+
+## Installation
+
+```bash
+ npm install nostr-tools # or yarn add nostr-tools
+```
 
 ## Usage
 
@@ -30,15 +36,15 @@ let event = {
   kind: 1,
   created_at: Math.floor(Date.now() / 1000),
   tags: [],
-  content: 'hello'
+  content: 'hello',
+  pubkey: getPublicKey(privateKey)
 }
 
 event.id = getEventHash(event)
-event.pubkey = getPublicKey(privateKey)
+event.sig = signEvent(event, privateKey)
-event.sig = await signEvent(event, privateKey)
 
 let ok = validateEvent(event)
-let veryOk = await verifySignature(event)
+let veryOk = verifySignature(event)
 ```
 
 ### Interacting with a relay
@@ -53,8 +59,6 @@ import {
 } from 'nostr-tools'
 
 const relay = relayInit('wss://relay.example.com')
-await relay.connect()
-
 relay.on('connect', () => {
   console.log(`connected to ${relay.url}`)
 })
@@ -62,6 +66,8 @@ relay.on('error', () => {
   console.log(`failed to connect to ${relay.url}`)
 })
 
+await relay.connect()
+
 // let's query for an event that exists
 let sub = relay.sub([
   {
@@ -98,20 +104,22 @@ let event = {
   content: 'hello world'
 }
 event.id = getEventHash(event)
-event.sig = await signEvent(event, sk)
+event.sig = signEvent(event, sk)
 
 let pub = relay.publish(event)
 pub.on('ok', () => {
-  console.log(`{relay.url} has accepted our event`)
+  console.log(`${relay.url} has accepted our event`)
-})
-pub.on('seen', () => {
-  console.log(`we saw the event on {relay.url}`)
 })
 pub.on('failed', reason => {
-  console.log(`failed to publish to {relay.url}: ${reason}`)
+  console.log(`failed to publish to ${relay.url}: ${reason}`)
 })
 
-await relay.close()
+let events = await relay.list([{kinds: [0, 1]}])
+let event = await relay.get({
+  ids: ['44e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245']
+})
+
+relay.close()
 ```
 
 To use this on Node.js you first must install `websocket-polyfill` and import it:
@@ -120,6 +128,68 @@ To use this on Node.js you first must install `websocket-polyfill` and import it
 import 'websocket-polyfill'
 ```
 
+### Interacting with multiple relays
+
+```js
+import {SimplePool} from 'nostr-tools'
+
+const pool = new SimplePool()
+
+let relays = ['wss://relay.example.com', 'wss://relay.example2.com']
+
+let sub = pool.sub(
+  [...relays, 'wss://relay.example3.com'],
+  [
+    {
+      authors: [
+        '32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245'
+      ]
+    }
+  ]
+)
+
+sub.on('event', event => {
+  // this will only be called once the first time the event is received
+  // ...
+})
+
+let pubs = pool.publish(relays, newEvent)
+pubs.on('ok', () => {
+  // this may be called multiple times, once for every relay that accepts the event
+  // ...
+})
+
+let events = await pool.list(relays, [{kinds: [0, 1]}])
+let event = await pool.get(relays, {
+  ids: ['44e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245']
+})
+
+let relaysForEvent = pool.seenOn(
+  '44e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245'
+)
+// relaysForEvent will be an array of URLs from relays a given event was seen on
+```
+
+### Parsing references (mentions) from a content using NIP-10 and NIP-27
+
+```js
+import {parseReferences} from 'nostr-tools'
+
+let references = parseReferences(event)
+let simpleAugmentedContent = event.content
+for (let i = 0; i < references.length; i++) {
+  let {text, profile, event, address} = references[i]
+  let augmentedReference = profile
+    ? `<strong>@${profilesCache[profile.pubkey].name}</strong>`
+    : event
+    ? `<em>${eventsCache[event.id].content.slice(0, 5)}</em>`
+    : address
+    ? `<a href="${text}">[link]</a>`
+    : text
+  simpleAugmentedContent.replaceAll(text, augmentedReference)
+}
+```
+
 ### Querying profile data from a NIP-05 address
 
 ```js
@@ -182,7 +252,7 @@ let pk2 = getPublicKey(sk2)
 
 // on the sender side
 let message = 'hello'
-let ciphertext = await nip04.encrypt(sk1, pk2, 'hello')
+let ciphertext = await nip04.encrypt(sk1, pk2, message)
 
 let event = {
   kind: 4,
@@ -195,13 +265,48 @@ let event = {
 sendEvent(event)
 
 // on the receiver side
-sub.on('event', (event) => {
+sub.on('event', event => {
-  let sender = event.tags.find(([k, v]) => k === 'p' && && v && v !== '')[1]
+  let sender = event.tags.find(([k, v]) => k === 'p' && v && v !== '')[1]
   pk1 === sender
   let plaintext = await nip04.decrypt(sk2, pk1, event.content)
 })
 ```
 
+### Performing and checking for delegation
+
+```js
+import {nip26, getPublicKey, generatePrivateKey} from 'nostr-tools'
+
+// delegator
+let sk1 = generatePrivateKey()
+let pk1 = getPublicKey(sk1)
+
+// delegatee
+let sk2 = generatePrivateKey()
+let pk2 = getPublicKey(sk2)
+
+// generate delegation
+let delegation = nip26.createDelegation(sk1, {
+  pubkey: pk2,
+  kind: 1,
+  since: Math.round(Date.now() / 1000),
+  until: Math.round(Date.now() / 1000) + 60 * 60 * 24 * 30 /* 30 days */
+})
+
+// the delegatee uses the delegation when building an event
+let event = {
+  pubkey: pk2,
+  kind: 1,
+  created_at: Math.round(Date.now() / 1000),
+  content: 'hello from a delegated key',
+  tags: [['delegation', delegation.from, delegation.cond, delegation.sig]]
+}
+
+// finally any receiver of this event can check for the presence of a valid delegation tag
+let delegator = nip26.getDelegator(event)
+assert(delegator === pk1) // will be null if there is no delegation tag or if it is invalid
+```
+
 Please consult the tests or [the source code](https://github.com/fiatjaf/nostr-tools) for more information that isn't available here.
 
 ### Using from the browser (if you don't want to use a bundler)
@@ -213,6 +318,11 @@ Please consult the tests or [the source code](https://github.com/fiatjaf/nostr-t
 </script>
 ```
 
+## Plumbing
+
+1. Install [`just`](https://just.systems/)
+2. `just -l`
+
 ## License
 
 Public domain.

build.js

@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 
+const fs = require('fs')
 const esbuild = require('esbuild')
 
 let common = {
@@ -11,11 +12,16 @@ let common = {
 esbuild
   .build({
     ...common,
-    outfile: 'lib/nostr.esm.js',
+    outfile: 'lib/esm/nostr.mjs',
     format: 'esm',
     packages: 'external'
   })
-  .then(() => console.log('esm build success.'))
+  .then(() => {
+    const packageJson = JSON.stringify({type: 'module'})
+    fs.writeFileSync(`${__dirname}/lib/esm/package.json`, packageJson, 'utf8')
+
+    console.log('esm build success.')
+  })
 
 esbuild
   .build({

event.test.js

@@ -1,49 +1,340 @@
-/* eslint-env jest */
-
 const {
+  getBlankEvent,
+  finishEvent,
+  serializeEvent,
+  getEventHash,
   validateEvent,
   verifySignature,
   signEvent,
-  getEventHash,
+  getPublicKey,
-  getPublicKey
+  Kind
 } = require('./lib/nostr.cjs')
 
-const event = {
+describe('Event', () => {
-  id: 'd7dd5eb3ab747e16f8d0212d53032ea2a7cadef53837e5a6c66d42849fcb9027',
+  describe('getBlankEvent', () => {
-  kind: 1,
+    it('should return a blank event object', () => {
-  pubkey: '22a12a128a3be27cd7fb250cbe796e692896398dc1440ae3fa567812c8107c1c',
+      expect(getBlankEvent()).toEqual({
-  created_at: 1670869179,
+        kind: 255,
-  content:
+        content: '',
-    'NOSTR "WINE-ACCOUNT" WITH HARVEST DATE STAMPED\n\n\n"The older the wine, the greater its reputation"\n\n\n22a12a128a3be27cd7fb250cbe796e692896398dc1440ae3fa567812c8107c1c\n\n\nNWA 2022-12-12\nAA',
-  tags: [['client', 'astral']],
-  sig: 'f110e4fdf67835fb07abc72469933c40bdc7334615610cade9554bf00945a1cebf84f8d079ec325d26fefd76fe51cb589bdbe208ac9cdbd63351ddad24a57559'
-}
-
-const unsigned = {
-  created_at: 1671217411,
-  kind: 0,
         tags: [],
-  content:
+        created_at: 0
-    '{"name":"fiatjaf","about":"buy my merch at fiatjaf store","picture":"https://fiatjaf.com/static/favicon.jpg","nip05":"_@fiatjaf.com"}'
+      })
-}
+    })
+  })
 
-const privateKey =
+  describe('finishEvent', () => {
-  '5c6c25b7ef18d8633e97512159954e1aa22809c6b763e94b9f91071836d00217'
+    it('should create a signed event from a template', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
 
-test('validate event', () => {
+      const template = {
-  expect(validateEvent(event)).toBeTruthy()
+        kind: Kind.Text,
-})
+        tags: [],
-
+        content: 'Hello, world!',
-test('check signature', async () => {
+        created_at: 1617932115
-  expect(await verifySignature(event)).toBeTruthy()
+      }
-})
+
-
+      const event = finishEvent(template, privateKey)
-test('sign event', async () => {
+
-  let sig = await signEvent(unsigned, privateKey)
+      expect(event.kind).toEqual(template.kind)
-  let hash = getEventHash(unsigned)
+      expect(event.tags).toEqual(template.tags)
-  let pubkey = getPublicKey(privateKey)
+      expect(event.content).toEqual(template.content)
-
+      expect(event.created_at).toEqual(template.created_at)
-  let signed = {...unsigned, id: hash, sig, pubkey}
+      expect(event.pubkey).toEqual(publicKey)
-
+      expect(typeof event.id).toEqual('string')
-  expect(await verifySignature(signed)).toBeTruthy()
+      expect(typeof event.sig).toEqual('string')
+    })
+  })
+
+  describe('serializeEvent', () => {
+    it('should serialize a valid event object', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const unsignedEvent = {
+        pubkey: publicKey,
+        created_at: 1617932115,
+        kind: Kind.Text,
+        tags: [],
+        content: 'Hello, world!'
+      }
+
+      const serializedEvent = serializeEvent(unsignedEvent)
+
+      expect(serializedEvent).toEqual(
+        JSON.stringify([
+          0,
+          publicKey,
+          unsignedEvent.created_at,
+          unsignedEvent.kind,
+          unsignedEvent.tags,
+          unsignedEvent.content
+        ])
+      )
+    })
+
+    it('should throw an error for an invalid event object', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const invalidEvent = {
+        kind: Kind.Text,
+        tags: [],
+        created_at: 1617932115,
+        pubkey: publicKey // missing content
+      }
+
+      expect(() => {
+        serializeEvent(invalidEvent)
+      }).toThrow("can't serialize event with wrong or missing properties")
+    })
+  })
+
+  describe('getEventHash', () => {
+    it('should return the correct event hash', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const unsignedEvent = {
+        kind: Kind.Text,
+        tags: [],
+        content: 'Hello, world!',
+        created_at: 1617932115,
+        pubkey: publicKey
+      }
+
+      const eventHash = getEventHash(unsignedEvent)
+
+      expect(typeof eventHash).toEqual('string')
+      expect(eventHash.length).toEqual(64)
+    })
+  })
+
+  describe('validateEvent', () => {
+    it('should return true for a valid event object', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const unsignedEvent = {
+        kind: Kind.Text,
+        tags: [],
+        content: 'Hello, world!',
+        created_at: 1617932115,
+        pubkey: publicKey
+      }
+
+      const isValid = validateEvent(unsignedEvent)
+
+      expect(isValid).toEqual(true)
+    })
+
+    it('should return false for a non object event', () => {
+      const nonObjectEvent = ''
+
+      const isValid = validateEvent(nonObjectEvent)
+
+      expect(isValid).toEqual(false)
+    })
+
+    it('should return false for an event object with missing properties', () => {
+      const invalidEvent = {
+        kind: Kind.Text,
+        tags: [],
+        created_at: 1617932115 // missing content and pubkey
+      }
+
+      const isValid = validateEvent(invalidEvent)
+
+      expect(isValid).toEqual(false)
+    })
+
+    it('should return false for an empty object', () => {
+      const emptyObj = {}
+
+      const isValid = validateEvent(emptyObj)
+
+      expect(isValid).toEqual(false)
+    })
+
+    it('should return false for an object with invalid properties', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const invalidEvent = {
+        kind: 1,
+        tags: [],
+        created_at: '1617932115', // should be a number
+        pubkey: publicKey
+      }
+
+      const isValid = validateEvent(invalidEvent)
+
+      expect(isValid).toEqual(false)
+    })
+
+    it('should return false for an object with an invalid public key', () => {
+      const invalidEvent = {
+        kind: 1,
+        tags: [],
+        content: 'Hello, world!',
+        created_at: 1617932115,
+        pubkey: 'invalid_pubkey'
+      }
+
+      const isValid = validateEvent(invalidEvent)
+
+      expect(isValid).toEqual(false)
+    })
+
+    it('should return false for an object with invalid tags', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const invalidEvent = {
+        kind: 1,
+        tags: {}, // should be an array
+        content: 'Hello, world!',
+        created_at: 1617932115,
+        pubkey: publicKey
+      }
+
+      const isValid = validateEvent(invalidEvent)
+
+      expect(isValid).toEqual(false)
+    })
+  })
+
+  describe('verifySignature', () => {
+    it('should return true for a valid event signature', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+
+      const event = finishEvent(
+        {
+          kind: Kind.Text,
+          tags: [],
+          content: 'Hello, world!',
+          created_at: 1617932115
+        },
+        privateKey
+      )
+
+      const isValid = verifySignature(event)
+
+      expect(isValid).toEqual(true)
+    })
+
+    it('should return false for an invalid event signature', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+
+      const event = finishEvent(
+        {
+          kind: Kind.Text,
+          tags: [],
+          content: 'Hello, world!',
+          created_at: 1617932115
+        },
+        privateKey
+      )
+
+      // tamper with the signature
+      event.sig = event.sig.replace(/0/g, '1')
+
+      const isValid = verifySignature(event)
+
+      expect(isValid).toEqual(false)
+    })
+
+    it('should return false when verifying an event with a different private key', () => {
+      const privateKey1 =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+
+      const privateKey2 =
+        '5b4a34f4e4b23c63ad55a35e3f84a3b53d96dbf266edf521a8358f71d19cbf67'
+      const publicKey2 = getPublicKey(privateKey2)
+
+      const event = finishEvent(
+        {
+          kind: Kind.Text,
+          tags: [],
+          content: 'Hello, world!',
+          created_at: 1617932115
+        },
+        privateKey1
+      )
+
+      // verify with different private key
+      const isValid = verifySignature({
+        ...event,
+        pubkey: publicKey2
+      })
+
+      expect(isValid).toEqual(false)
+    })
+  })
+
+  describe('signEvent', () => {
+    it('should sign an event object', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const unsignedEvent = {
+        kind: Kind.Text,
+        tags: [],
+        content: 'Hello, world!',
+        created_at: 1617932115,
+        pubkey: publicKey
+      }
+
+      const sig = signEvent(unsignedEvent, privateKey)
+
+      // verify the signature
+      const isValid = verifySignature({
+        ...unsignedEvent,
+        sig
+      })
+
+      expect(typeof sig).toEqual('string')
+      expect(sig.length).toEqual(128)
+      expect(isValid).toEqual(true)
+    })
+
+    it('should not sign an event with different private key', () => {
+      const privateKey =
+        'd217c1ff2f8a65c3e3a1740db3b9f58b8c848bb45e26d00ed4714e4a0f4ceecf'
+      const publicKey = getPublicKey(privateKey)
+
+      const wrongPrivateKey =
+        'a91e2a9d9e0f70f0877bea0dbf034e8f95d7392a27a7f07da0d14b9e9d456be7'
+
+      const unsignedEvent = {
+        kind: Kind.Text,
+        tags: [],
+        content: 'Hello, world!',
+        created_at: 1617932115,
+        pubkey: publicKey
+      }
+
+      const sig = signEvent(unsignedEvent, wrongPrivateKey)
+
+      // verify the signature
+      const isValid = verifySignature({
+        ...unsignedEvent,
+        sig
+      })
+
+      expect(typeof sig).toEqual('string')
+      expect(sig.length).toEqual(128)
+      expect(isValid).toEqual(false)
+    })
+  })
 })

event.ts

@@ -2,28 +2,67 @@ import * as secp256k1 from '@noble/secp256k1'
 import {sha256} from '@noble/hashes/sha256'
 
 import {utf8Encoder} from './utils'
+import {getPublicKey} from './keys'
 
-export type Event = {
+/* eslint-disable no-unused-vars */
-  id?: string
+export enum Kind {
-  sig?: string
+  Metadata = 0,
-  kind: number
+  Text = 1,
+  RecommendRelay = 2,
+  Contacts = 3,
+  EncryptedDirectMessage = 4,
+  EventDeletion = 5,
+  Reaction = 7,
+  ChannelCreation = 40,
+  ChannelMetadata = 41,
+  ChannelMessage = 42,
+  ChannelHideMessage = 43,
+  ChannelMuteUser = 44,
+  Report = 1984,
+  ZapRequest = 9734,
+  Zap = 9735,
+  RelayList = 10002,
+  ClientAuth = 22242,
+  Article = 30023
+}
+
+export type EventTemplate = {
+  kind: Kind
   tags: string[][]
-  pubkey: string
   content: string
   created_at: number
 }
 
-export function getBlankEvent(): Event {
+export type UnsignedEvent = EventTemplate & {
+  pubkey: string
+}
+
+export type Event = UnsignedEvent & {
+  id: string
+  sig: string
+}
+
+export function getBlankEvent(): EventTemplate {
   return {
     kind: 255,
-    pubkey: '',
     content: '',
     tags: [],
     created_at: 0
   }
 }
 
-export function serializeEvent(evt: Event): string {
+export function finishEvent(t: EventTemplate, privateKey: string): Event {
+  let event = t as Event
+  event.pubkey = getPublicKey(privateKey)
+  event.id = getEventHash(event)
+  event.sig = signEvent(event, privateKey)
+  return event
+}
+
+export function serializeEvent(evt: UnsignedEvent): string {
+  if (!validateEvent(evt))
+    throw new Error("can't serialize event with wrong or missing properties")
+
   return JSON.stringify([
     0,
     evt.pubkey,
@@ -34,15 +73,18 @@ export function serializeEvent(evt: Event): string {
   ])
 }
 
-export function getEventHash(event: Event): string {
+export function getEventHash(event: UnsignedEvent): string {
   let eventHash = sha256(utf8Encoder.encode(serializeEvent(event)))
   return secp256k1.utils.bytesToHex(eventHash)
 }
 
-export function validateEvent(event: Event): boolean {
+export function validateEvent(event: UnsignedEvent): boolean {
-  if (event.id !== getEventHash(event)) return false
+  if (typeof event !== 'object') return false
+  if (typeof event.kind !== 'number') return false
   if (typeof event.content !== 'string') return false
   if (typeof event.created_at !== 'number') return false
+  if (typeof event.pubkey !== 'string') return false
+  if (!event.pubkey.match(/^[a-f0-9]{64}$/)) return false
 
   if (!Array.isArray(event.tags)) return false
   for (let i = 0; i < event.tags.length; i++) {
@@ -56,14 +98,16 @@ export function validateEvent(event: Event): boolean {
   return true
 }
 
-export function verifySignature(
+export function verifySignature(event: Event & {sig: string}): boolean {
-  event: Event & {id: string; sig: string}
+  return secp256k1.schnorr.verifySync(
-): Promise<boolean> {
+    event.sig,
-  return secp256k1.schnorr.verify(event.sig, event.id, event.pubkey)
+    getEventHash(event),
-}
+    event.pubkey
-
+  )
-export async function signEvent(event: Event, key: string): Promise<string> {
+}
-  return secp256k1.utils.bytesToHex(
+
-    await secp256k1.schnorr.sign(event.id || getEventHash(event), key)
+export function signEvent(event: UnsignedEvent, key: string): string {
+  return secp256k1.utils.bytesToHex(
+    secp256k1.schnorr.signSync(getEventHash(event), key)
   )
 }

fakejson.test.js

@@ -0,0 +1,49 @@
+/* eslint-env jest */
+
+const {fj} = require('./lib/nostr.cjs')
+
+test('match id', () => {
+  expect(
+    fj.matchEventId(
+      `["EVENT","nostril-query",{"tags":[],"content":"so did we cut all corners and p2p stuff in order to make a decentralized social network that was fast and worked, but in the end what we got was a lot of very slow clients that can't handle the traffic of one jack dorsey tweet?","sig":"ca62629d189edebb8f0811cfa0ac53015013df5f305dcba3f411ba15cfc4074d8c2d517ee7d9e81c9eb72a7328bfbe31c9122156397565ac55e740404e2b1fe7","id":"fef2a50f7d9d3d5a5f38ee761bc087ec16198d3f0140df6d1e8193abf7c2b146","kind":1,"pubkey":"3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d","created_at":1671150419}]`,
+      'fef2a50f7d9d3d5a5f38ee761bc087ec16198d3f0140df6d1e8193abf7c2b146'
+    )
+  ).toBeTruthy()
+
+  expect(
+    fj.matchEventId(
+      `["EVENT","nostril-query",{"content":"a bunch of mfs interacted with my post using what I assume were \"likes\": https://nostr.build/i/964.png","created_at":1672506879,"id":"f40bdd0905137ad60482537e260890ab50b0863bf16e67cf9383f203bd26c96f","kind":1,"pubkey":"3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d","sig":"8b825d2d4096f0643b18ca39da59ec07a682cd8a3e717f119c845037573d98099f5bea94ec7ddedd5600c8020144a255ed52882a911f7f7ada6d6abb3c0a1eb4","tags":[]}]`,
+      'fef2a50f7d9d3d5a5f38ee761bc087ec16198d3f0140df6d1e8193abf7c2b146'
+    )
+  ).toBeFalsy()
+})
+
+test('match kind', () => {
+  expect(
+    fj.matchEventKind(
+      `["EVENT","nostril-query",{"tags":[],"content":"so did we cut all corners and p2p stuff in order to make a decentralized social network that was fast and worked, but in the end what we got was a lot of very slow clients that can't handle the traffic of one jack dorsey tweet?","sig":"ca62629d189edebb8f0811cfa0ac53015013df5f305dcba3f411ba15cfc4074d8c2d517ee7d9e81c9eb72a7328bfbe31c9122156397565ac55e740404e2b1fe7","id":"fef2a50f7d9d3d5a5f38ee761bc087ec16198d3f0140df6d1e8193abf7c2b146","kind":1,"pubkey":"3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d","created_at":1671150419}]`,
+      1
+    )
+  ).toBeTruthy()
+
+  expect(
+    fj.matchEventKind(
+      `["EVENT","nostril-query",{"content":"{\"name\":\"fiatjaf\",\"about\":\"buy my merch at fiatjaf store\",\"picture\":\"https://fiatjaf.com/static/favicon.jpg\",\"nip05\":\"_@fiatjaf.com\"}","created_at":1671217411,"id":"b52f93f6dfecf9d81f59062827cd941412a0e8398dda60baf960b17499b88900","kind":12720,"pubkey":"3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d","sig":"fc1ea5d45fa5ed0526faed06e8fc7a558e60d1b213e9714f440828584ee999b93407092f9b04deea7e504fa034fc0428f31f7f0f95417b3280ebe6004b80b470","tags":[]}]`,
+      12720
+    )
+  ).toBeTruthy()
+})
+
+test('match subscription id', () => {
+  expect(fj.getSubscriptionId('["EVENT","",{}]')).toEqual('')
+  expect(fj.getSubscriptionId('["EVENT","_",{}]')).toEqual('_')
+  expect(fj.getSubscriptionId('["EVENT","subname",{}]')).toEqual('subname')
+  expect(fj.getSubscriptionId('["EVENT", "kasjbdjkav", {}]')).toEqual(
+    'kasjbdjkav'
+  )
+  expect(
+    fj.getSubscriptionId(
+      '  [ \n\n "EVENT"  , \n\n "y4d5ow45gfwoiudfÇA VSADLKAN KLDASB[12312535]SFMZSNJKLH" , {}]'
+    )
+  ).toEqual('y4d5ow45gfwoiudfÇA VSADLKAN KLDASB[12312535]SFMZSNJKLH')
+})

fakejson.ts

@@ -0,0 +1,41 @@
+export function getHex64(json: string, field: string): string {
+  let len = field.length + 3
+  let idx = json.indexOf(`"${field}":`) + len
+  let s = json.slice(idx).indexOf(`"`) + idx + 1
+  return json.slice(s, s + 64)
+}
+
+export function getInt(json: string, field: string): number {
+  let len = field.length
+  let idx = json.indexOf(`"${field}":`) + len + 3
+  let sliced = json.slice(idx)
+  let end = Math.min(sliced.indexOf(','), sliced.indexOf('}'))
+  return parseInt(sliced.slice(0, end), 10)
+}
+
+export function getSubscriptionId(json: string): string | null {
+  let idx = json.slice(0, 22).indexOf(`"EVENT"`)
+  if (idx === -1) return null
+
+  let pstart = json.slice(idx + 7 + 1).indexOf(`"`)
+  if (pstart === -1) return null
+  let start = idx + 7 + 1 + pstart
+
+  let pend = json.slice(start + 1, 80).indexOf(`"`)
+  if (pend === -1) return null
+  let end = start + 1 + pend
+
+  return json.slice(start + 1, end)
+}
+
+export function matchEventId(json: string, id: string): boolean {
+  return id === getHex64(json, 'id')
+}
+
+export function matchEventPubkey(json: string, pubkey: string): boolean {
+  return pubkey === getHex64(json, 'pubkey')
+}
+
+export function matchEventKind(json: string, kind: number): boolean {
+  return kind === getInt(json, 'kind')
+}

filter.test.js

@@ -1,42 +1,176 @@
 /* eslint-env jest */
 
-const {matchFilters} = require('./lib/nostr.cjs')
+const {matchFilter, matchFilters} = require('./lib/nostr.cjs.js')
 
-test('test if filters match', () => {
+describe('Filter', () => {
-  ;[
+  describe('matchFilter', () => {
-    {
+    it('should return true when all filter conditions are met', () => {
-      filters: [{ids: ['i']}],
+      const filter = {
-      good: [{id: 'i'}],
+        ids: ['123', '456'],
-      bad: [{id: 'j'}]
+        kinds: [1, 2, 3],
-    },
+        authors: ['abc'],
-    {
+        since: 100,
-      filters: [{authors: ['abc']}, {kinds: [1, 3]}],
+        until: 200,
-      good: [
+        '#tag': ['value']
-        {pubkey: 'xyz', kind: 3},
-        {pubkey: 'abc', kind: 12},
-        {pubkey: 'abc', kind: 1}
-      ],
-      bad: [{pubkey: 'hhh', kind: 12}]
-    },
-    {
-      filters: [{'#e': ['yyy'], since: 444}],
-      good: [
-        {
-          tags: [
-            ['e', 'uuu'],
-            ['e', 'yyy']
-          ],
-          created_at: 555
       }
-      ],
+
-      bad: [{tags: [['e', 'uuu']], created_at: 111}]
+      const event = {
+        id: '123',
+        kind: 1,
+        pubkey: 'abc',
+        created_at: 150,
+        tags: [['tag', 'value']]
       }
-  ].forEach(({filters, good, bad}) => {
+
-    good.forEach(ev => {
+      const result = matchFilter(filter, event)
-      expect(matchFilters(filters, ev)).toBeTruthy()
+
+      expect(result).toEqual(true)
     })
-    bad.forEach(ev => {
+
-      expect(matchFilters(filters, ev)).toBeFalsy()
+    it('should return false when the event id is not in the filter', () => {
+      const filter = {ids: ['123', '456']}
+
+      const event = {id: '789'}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return false when the event kind is not in the filter', () => {
+      const filter = {kinds: [1, 2, 3]}
+
+      const event = {kind: 4}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return false when the event author is not in the filter', () => {
+      const filter = {authors: ['abc', 'def']}
+
+      const event = {pubkey: 'ghi'}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return false when a tag is not present in the event', () => {
+      const filter = {'#tag': ['value1', 'value2']}
+
+      const event = {tags: [['not_tag', 'value1']]}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return false when a tag value is not present in the event', () => {
+      const filter = {'#tag': ['value1', 'value2']}
+
+      const event = {tags: [['tag', 'value3']]}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return true when filter has tags that is present in the event', () => {
+      const filter = {'#tag1': ['foo']}
+
+      const event = {
+        id: '123',
+        kind: 1,
+        pubkey: 'abc',
+        created_at: 150,
+        tags: [
+          ['tag1', 'foo'],
+          ['tag2', 'bar']
+        ]
+      }
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(true)
+    })
+
+    it('should return false when the event is before the filter since value', () => {
+      const filter = {since: 100}
+
+      const event = {created_at: 50}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return false when the event is after the filter until value', () => {
+      const filter = {until: 100}
+
+      const event = {created_at: 150}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(false)
+    })
+  })
+
+  describe('matchFilters', () => {
+    it('should return true when at least one filter matches the event', () => {
+      const filters = [
+        {ids: ['123'], kinds: [1], authors: ['abc']},
+        {ids: ['456'], kinds: [2], authors: ['def']},
+        {ids: ['789'], kinds: [3], authors: ['ghi']}
+      ]
+
+      const event = {id: '789', kind: 3, pubkey: 'ghi'}
+
+      const result = matchFilters(filters, event)
+
+      expect(result).toEqual(true)
+    })
+
+    it('should return true when event matches one or more filters and some have limit set', () => {
+      const filters = [
+        {ids: ['123'], limit: 1},
+        {kinds: [1], limit: 2},
+        {authors: ['abc'], limit: 3}
+      ]
+
+      const event = {id: '123', kind: 1, pubkey: 'abc', created_at: 150}
+
+      const result = matchFilters(filters, event)
+
+      expect(result).toEqual(true)
+    })
+
+    it('should return false when no filters match the event', () => {
+      const filters = [
+        {ids: ['123'], kinds: [1], authors: ['abc']},
+        {ids: ['456'], kinds: [2], authors: ['def']},
+        {ids: ['789'], kinds: [3], authors: ['ghi']}
+      ]
+
+      const event = {id: '100', kind: 4, pubkey: 'jkl'}
+
+      const result = matchFilters(filters, event)
+
+      expect(result).toEqual(false)
+    })
+
+    it('should return false when event matches none of the filters and some have limit set', () => {
+      const filters = [
+        {ids: ['123'], limit: 1},
+        {kinds: [1], limit: 2},
+        {authors: ['abc'], limit: 3}
+      ]
+      const event = {id: '456', kind: 2, pubkey: 'def', created_at: 200}
+
+      const result = matchFilters(filters, event)
+
+      expect(result).toEqual(false)
     })
   })
 })

filter.ts

@@ -6,6 +6,8 @@ export type Filter = {
   authors?: string[]
   since?: number
   until?: number
+  limit?: number
+  search?: string
   [key: `#${string}`]: string[]
 }
 

index.ts

@@ -2,8 +2,25 @@ export * from './keys'
 export * from './relay'
 export * from './event'
 export * from './filter'
+export * from './pool'
+export * from './references'
 
 export * as nip04 from './nip04'
 export * as nip05 from './nip05'
 export * as nip06 from './nip06'
 export * as nip19 from './nip19'
+export * as nip26 from './nip26'
+export * as nip39 from './nip39'
+export * as nip57 from './nip57'
+
+export * as fj from './fakejson'
+export * as utils from './utils'
+
+// monkey patch secp256k1
+import * as secp256k1 from '@noble/secp256k1'
+import {hmac} from '@noble/hashes/hmac'
+import {sha256} from '@noble/hashes/sha256'
+secp256k1.utils.hmacSha256Sync = (key, ...msgs) =>
+  hmac(sha256, key, secp256k1.utils.concatBytes(...msgs))
+secp256k1.utils.sha256Sync = (...msgs) =>
+  sha256(secp256k1.utils.concatBytes(...msgs))

justfile

@@ -0,0 +1,23 @@
+export PATH := "./node_modules/.bin:" + env_var('PATH')
+
+install-dependencies:
+    yarn --ignore-engines
+
+build:
+    rm -rf lib
+    node build.js
+
+test: build
+    jest
+
+test-only file: build
+    jest {{file}}
+
+emit-types:
+    tsc # see tsconfig.json
+
+publish: build emit-types
+    npm publish
+
+format:
+    prettier --plugin-search-dir . --write .

nip04.ts

@@ -1,6 +1,6 @@
 import {randomBytes} from '@noble/hashes/utils'
 import * as secp256k1 from '@noble/secp256k1'
-import {encode as b64encode, decode as b64decode} from 'base64-arraybuffer'
+import {base64} from '@scure/base'
 
 import {utf8Decoder, utf8Encoder} from './utils'
 
@@ -26,8 +26,8 @@ export async function encrypt(
     cryptoKey,
     plaintext
   )
-  let ctb64 = b64encode(ciphertext)
+  let ctb64 = base64.encode(new Uint8Array(ciphertext))
-  let ivb64 = b64encode(iv.buffer)
+  let ivb64 = base64.encode(new Uint8Array(iv.buffer))
 
   return `${ctb64}?iv=${ivb64}`
 }
@@ -48,8 +48,8 @@ export async function decrypt(
     false,
     ['decrypt']
   )
-  let ciphertext = b64decode(ctb64)
+  let ciphertext = base64.decode(ctb64)
-  let iv = b64decode(ivb64)
+  let iv = base64.decode(ivb64)
 
   let plaintext = await crypto.subtle.decrypt(
     {name: 'AES-CBC', iv},

nip05.ts

@@ -1,6 +1,10 @@
 import {ProfilePointer} from './nip19'
 
-var _fetch = fetch
+var _fetch: any
+
+try {
+  _fetch = fetch
+} catch {}
 
 export function useFetchImplementation(fetchImplementation: any) {
   _fetch = fetchImplementation
@@ -32,9 +36,17 @@ export async function queryProfile(
     name = '_'
   }
 
-  let res = await (
+  if (!name.match(/^[A-Za-z0-9-_]+$/)) return null
+  if (!domain.includes('.')) return null
+
+  let res
+  try {
+    res = await (
       await _fetch(`https://${domain}/.well-known/nostr.json?name=${name}`)
     ).json()
+  } catch (err) {
+    return null
+  }
 
   if (!res?.names?.[name]) return null
 

nip06.test.js

@@ -0,0 +1,19 @@
+/* eslint-env jest */
+const {nip06} = require('./lib/nostr.cjs')
+
+test('generate private key from a mnemonic', async () => {
+  const mnemonic = 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong'
+  const privateKey = nip06.privateKeyFromSeedWords(mnemonic)
+  expect(privateKey).toEqual(
+    'c26cf31d8ba425b555ca27d00ca71b5008004f2f662470f8c8131822ec129fe2'
+  )
+})
+
+test('generate private key from a mnemonic and passphrase', async () => {
+  const mnemonic = 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong'
+  const passphrase = '123'
+  const privateKey = nip06.privateKeyFromSeedWords(mnemonic, passphrase)
+  expect(privateKey).toEqual(
+    '55a22b8203273d0aaf24c22c8fbe99608e70c524b17265641074281c8b978ae4'
+  )
+})

nip06.ts

@@ -7,17 +7,16 @@ import {
 } from '@scure/bip39'
 import {HDKey} from '@scure/bip32'
 
-export function privateKeyFromSeed(seed: string): string {
+export function privateKeyFromSeedWords(
-  let root = HDKey.fromMasterSeed(secp256k1.utils.hexToBytes(seed))
+  mnemonic: string,
+  passphrase?: string
+): string {
+  let root = HDKey.fromMasterSeed(mnemonicToSeedSync(mnemonic, passphrase))
   let privateKey = root.derive(`m/44'/1237'/0'/0/0`).privateKey
   if (!privateKey) throw new Error('could not derive private key')
   return secp256k1.utils.bytesToHex(privateKey)
 }
 
-export function seedFromWords(mnemonic: string): string {
-  return secp256k1.utils.bytesToHex(mnemonicToSeedSync(mnemonic))
-}
-
 export function generateSeedWords(): string {
   return generateMnemonic(wordlist)
 }

nip19.test.js

@@ -34,3 +34,69 @@ test('encode and decode nprofile', () => {
   expect(data.relays).toContain(relays[0])
   expect(data.relays).toContain(relays[1])
 })
+
+test('decode nprofile without relays', () => {
+  expect(
+    nip19.decode(
+      nip19.nprofileEncode({
+        pubkey:
+          '97c70a44366a6535c145b333f973ea86dfdc2d7a99da618c40c64705ad98e322',
+        relays: []
+      })
+    ).data
+  ).toHaveProperty(
+    'pubkey',
+    '97c70a44366a6535c145b333f973ea86dfdc2d7a99da618c40c64705ad98e322'
+  )
+})
+
+test('encode and decode naddr', () => {
+  let pk = getPublicKey(generatePrivateKey())
+  let relays = [
+    'wss://relay.nostr.example.mydomain.example.com',
+    'wss://nostr.banana.com'
+  ]
+  let naddr = nip19.naddrEncode({
+    pubkey: pk,
+    relays,
+    kind: 30023,
+    identifier: 'banana'
+  })
+  expect(naddr).toMatch(/naddr1\w+/)
+  let {type, data} = nip19.decode(naddr)
+  expect(type).toEqual('naddr')
+  expect(data.pubkey).toEqual(pk)
+  expect(data.relays).toContain(relays[0])
+  expect(data.relays).toContain(relays[1])
+  expect(data.kind).toEqual(30023)
+  expect(data.identifier).toEqual('banana')
+})
+
+test('decode naddr from habla.news', () => {
+  let {type, data} = nip19.decode(
+    'naddr1qq98yetxv4ex2mnrv4esygrl54h466tz4v0re4pyuavvxqptsejl0vxcmnhfl60z3rth2xkpjspsgqqqw4rsf34vl5'
+  )
+  expect(type).toEqual('naddr')
+  expect(data.pubkey).toEqual(
+    '7fa56f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751ac194'
+  )
+  expect(data.kind).toEqual(30023)
+  expect(data.identifier).toEqual('references')
+})
+
+test('decode naddr from go-nostr with different TLV ordering', () => {
+  let {type, data} = nip19.decode(
+    'naddr1qqrxyctwv9hxzq3q80cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsxpqqqp65wqfwwaehxw309aex2mrp0yhxummnw3ezuetcv9khqmr99ekhjer0d4skjm3wv4uxzmtsd3jjucm0d5q3vamnwvaz7tmwdaehgu3wvfskuctwvyhxxmmd0zfmwx'
+  )
+
+  expect(type).toEqual('naddr')
+  expect(data.pubkey).toEqual(
+    '3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d'
+  )
+  expect(data.relays).toContain(
+    'wss://relay.nostr.example.mydomain.example.com'
+  )
+  expect(data.relays).toContain('wss://nostr.banana.com')
+  expect(data.kind).toEqual(30023)
+  expect(data.identifier).toEqual('banana')
+})

nip19.ts

@@ -1,8 +1,10 @@
 import * as secp256k1 from '@noble/secp256k1'
-import {bech32} from 'bech32'
+import {bech32} from '@scure/base'
 
 import {utf8Decoder, utf8Encoder} from './utils'
 
+const Bech32MaxSize = 5000
+
 export type ProfilePointer = {
   pubkey: string // hex
   relays?: string[]
@@ -11,16 +13,25 @@ export type ProfilePointer = {
 export type EventPointer = {
   id: string // hex
   relays?: string[]
+  author?: string
+}
+
+export type AddressPointer = {
+  identifier: string
+  pubkey: string
+  kind: number
+  relays?: string[]
 }
 
 export function decode(nip19: string): {
   type: string
-  data: ProfilePointer | EventPointer | string
+  data: ProfilePointer | EventPointer | AddressPointer | string
 } {
-  let {prefix, words} = bech32.decode(nip19, 1000)
+  let {prefix, words} = bech32.decode(nip19, Bech32MaxSize)
   let data = new Uint8Array(bech32.fromWords(words))
 
-  if (prefix === 'nprofile') {
+  switch (prefix) {
+    case 'nprofile': {
       let tlv = parseTLV(data)
       if (!tlv[0]?.[0]) throw new Error('missing TLV 0 for nprofile')
       if (tlv[0][0].length !== 32) throw new Error('TLV 0 should be 32 bytes')
@@ -29,30 +40,56 @@ export function decode(nip19: string): {
         type: 'nprofile',
         data: {
           pubkey: secp256k1.utils.bytesToHex(tlv[0][0]),
-        relays: tlv[1].map(d => utf8Decoder.decode(d))
+          relays: tlv[1] ? tlv[1].map(d => utf8Decoder.decode(d)) : []
         }
       }
     }
-
+    case 'nevent': {
-  if (prefix === 'nevent') {
       let tlv = parseTLV(data)
       if (!tlv[0]?.[0]) throw new Error('missing TLV 0 for nevent')
       if (tlv[0][0].length !== 32) throw new Error('TLV 0 should be 32 bytes')
+      if (tlv[2] && tlv[2][0].length !== 32)
+        throw new Error('TLV 2 should be 32 bytes')
 
       return {
         type: 'nevent',
         data: {
           id: secp256k1.utils.bytesToHex(tlv[0][0]),
-        relays: tlv[1].map(d => utf8Decoder.decode(d))
+          relays: tlv[1] ? tlv[1].map(d => utf8Decoder.decode(d)) : [],
+          author: tlv[2]?.[0]
+            ? secp256k1.utils.bytesToHex(tlv[2][0])
+            : undefined
         }
       }
     }
 
-  if (prefix === 'nsec' || prefix === 'npub' || prefix === 'note') {
+    case 'naddr': {
+      let tlv = parseTLV(data)
+      if (!tlv[0]?.[0]) throw new Error('missing TLV 0 for naddr')
+      if (!tlv[2]?.[0]) throw new Error('missing TLV 2 for naddr')
+      if (tlv[2][0].length !== 32) throw new Error('TLV 2 should be 32 bytes')
+      if (!tlv[3]?.[0]) throw new Error('missing TLV 3 for naddr')
+      if (tlv[3][0].length !== 4) throw new Error('TLV 3 should be 4 bytes')
+
+      return {
+        type: 'naddr',
+        data: {
+          identifier: utf8Decoder.decode(tlv[0][0]),
+          pubkey: secp256k1.utils.bytesToHex(tlv[2][0]),
+          kind: parseInt(secp256k1.utils.bytesToHex(tlv[3][0]), 16),
+          relays: tlv[1] ? tlv[1].map(d => utf8Decoder.decode(d)) : []
+        }
+      }
+    }
+
+    case 'nsec':
+    case 'npub':
+    case 'note':
       return {type: prefix, data: secp256k1.utils.bytesToHex(data)}
-  }
 
+    default:
       throw new Error(`unknown prefix ${prefix}`)
+  }
 }
 
 type TLV = {[t: number]: Uint8Array[]}
@@ -87,7 +124,7 @@ export function noteEncode(hex: string): string {
 function encodeBytes(prefix: string, hex: string): string {
   let data = secp256k1.utils.hexToBytes(hex)
   let words = bech32.toWords(data)
-  return bech32.encode(prefix, words, 1000)
+  return bech32.encode(prefix, words, Bech32MaxSize)
 }
 
 export function nprofileEncode(profile: ProfilePointer): string {
@@ -96,16 +133,31 @@ export function nprofileEncode(profile: ProfilePointer): string {
     1: (profile.relays || []).map(url => utf8Encoder.encode(url))
   })
   let words = bech32.toWords(data)
-  return bech32.encode('nprofile', words, 1000)
+  return bech32.encode('nprofile', words, Bech32MaxSize)
 }
 
 export function neventEncode(event: EventPointer): string {
   let data = encodeTLV({
     0: [secp256k1.utils.hexToBytes(event.id)],
-    1: (event.relays || []).map(url => utf8Encoder.encode(url))
+    1: (event.relays || []).map(url => utf8Encoder.encode(url)),
+    2: event.author ? [secp256k1.utils.hexToBytes(event.author)] : []
   })
   let words = bech32.toWords(data)
-  return bech32.encode('nevent', words, 1000)
+  return bech32.encode('nevent', words, Bech32MaxSize)
+}
+
+export function naddrEncode(addr: AddressPointer): string {
+  let kind = new ArrayBuffer(4)
+  new DataView(kind).setUint32(0, addr.kind, false)
+
+  let data = encodeTLV({
+    0: [utf8Encoder.encode(addr.identifier)],
+    1: (addr.relays || []).map(url => utf8Encoder.encode(url)),
+    2: [secp256k1.utils.hexToBytes(addr.pubkey)],
+    3: [new Uint8Array(kind)]
+  })
+  let words = bech32.toWords(data)
+  return bech32.encode('naddr', words, Bech32MaxSize)
 }
 
 function encodeTLV(tlv: TLV): Uint8Array {

nip26.test.js

@@ -0,0 +1,105 @@
+/* eslint-env jest */
+
+const {nip26, getPublicKey, generatePrivateKey} = require('./lib/nostr.cjs')
+
+test('parse good delegation from NIP', async () => {
+  expect(
+    nip26.getDelegator({
+      id: 'a080fd288b60ac2225ff2e2d815291bd730911e583e177302cc949a15dc2b2dc',
+      pubkey:
+        '62903b1ff41559daf9ee98ef1ae67cc52f301bb5ce26d14baba3052f649c3f49',
+      created_at: 1660896109,
+      kind: 1,
+      tags: [
+        [
+          'delegation',
+          '86f0689bd48dcd19c67a19d994f938ee34f251d8c39976290955ff585f2db42e',
+          'kind=1&created_at>1640995200',
+          'c33c88ba78ec3c760e49db591ac5f7b129e3887c8af7729795e85a0588007e5ac89b46549232d8f918eefd73e726cb450135314bfda419c030d0b6affe401ec1'
+        ]
+      ],
+      content: 'Hello world',
+      sig: 'cd4a3cd20dc61dcbc98324de561a07fd23b3d9702115920c0814b5fb822cc5b7c5bcdaf3fa326d24ed50c5b9c8214d66c75bae34e3a84c25e4d122afccb66eb6'
+    })
+  ).toEqual('86f0689bd48dcd19c67a19d994f938ee34f251d8c39976290955ff585f2db42e')
+})
+
+test('parse bad delegations', async () => {
+  expect(
+    nip26.getDelegator({
+      id: 'a080fd288b60ac2225ff2e2d815291bd730911e583e177302cc949a15dc2b2dc',
+      pubkey:
+        '62903b1ff41559daf9ee98ef1ae67cc52f301bb5ce26d14baba3052f649c3f49',
+      created_at: 1660896109,
+      kind: 1,
+      tags: [
+        [
+          'delegation',
+          '86f0689bd48dcd19c67a19d994f938ee34f251d8c39976290955ff585f2db42f',
+          'kind=1&created_at>1640995200',
+          'c33c88ba78ec3c760e49db591ac5f7b129e3887c8af7729795e85a0588007e5ac89b46549232d8f918eefd73e726cb450135314bfda419c030d0b6affe401ec1'
+        ]
+      ],
+      content: 'Hello world',
+      sig: 'cd4a3cd20dc61dcbc98324de561a07fd23b3d9702115920c0814b5fb822cc5b7c5bcdaf3fa326d24ed50c5b9c8214d66c75bae34e3a84c25e4d122afccb66eb6'
+    })
+  ).toEqual(null)
+
+  expect(
+    nip26.getDelegator({
+      id: 'a080fd288b60ac2225ff2e2d815291bd730911e583e177302cc949a15dc2b2dc',
+      pubkey:
+        '62903b1ff41559daf9ee98ef1ae67cc52f301bb5ce26d14baba3052f649c3f49',
+      created_at: 1660896109,
+      kind: 1,
+      tags: [
+        [
+          'delegation',
+          '86f0689bd48dcd19c67a19d994f938ee34f251d8c39976290955ff585f2db42e',
+          'kind=1&created_at>1740995200',
+          'c33c88ba78ec3c760e49db591ac5f7b129e3887c8af7729795e85a0588007e5ac89b46549232d8f918eefd73e726cb450135314bfda419c030d0b6affe401ec1'
+        ]
+      ],
+      content: 'Hello world',
+      sig: 'cd4a3cd20dc61dcbc98324de561a07fd23b3d9702115920c0814b5fb822cc5b7c5bcdaf3fa326d24ed50c5b9c8214d66c75bae34e3a84c25e4d122afccb66eb6'
+    })
+  ).toEqual(null)
+
+  expect(
+    nip26.getDelegator({
+      id: 'a080fd288b60ac2225ff2e2d815291bd730911e583e177302cc949a15dc2b2dc',
+      pubkey:
+        '62903b1ff41559daf9ee98ef1ae67c152f301bb5ce26d14baba3052f649c3f49',
+      created_at: 1660896109,
+      kind: 1,
+      tags: [
+        [
+          'delegation',
+          '86f0689bd48dcd19c67a19d994f938ee34f251d8c39976290955ff585f2db42e',
+          'kind=1&created_at>1640995200',
+          'c33c88ba78ec3c760e49db591ac5f7b129e3887c8af7729795e85a0588007e5ac89b46549232d8f918eefd73e726cb450135314bfda419c030d0b6affe401ec1'
+        ]
+      ],
+      content: 'Hello world',
+      sig: 'cd4a3cd20dc61dcbc98324de561a07fd23b3d9702115920c0814b5fb822cc5b7c5bcdaf3fa326d24ed50c5b9c8214d66c75bae34e3a84c25e4d122afccb66eb6'
+    })
+  ).toEqual(null)
+})
+
+test('create and verify delegation', async () => {
+  let sk1 = generatePrivateKey()
+  let pk1 = getPublicKey(sk1)
+  let sk2 = generatePrivateKey()
+  let pk2 = getPublicKey(sk2)
+  let delegation = nip26.createDelegation(sk1, {pubkey: pk2, kind: 1})
+  expect(delegation).toHaveProperty('from', pk1)
+  expect(delegation).toHaveProperty('to', pk2)
+  expect(delegation).toHaveProperty('cond', 'kind=1')
+
+  let event = {
+    kind: 1,
+    tags: [['delegation', delegation.from, delegation.cond, delegation.sig]],
+    pubkey: pk2
+  }
+  expect(nip26.getDelegator(event)).toEqual(pk1)
+})

nip26.ts

@@ -0,0 +1,90 @@
+import * as secp256k1 from '@noble/secp256k1'
+import {sha256} from '@noble/hashes/sha256'
+
+import {Event} from './event'
+import {utf8Encoder} from './utils'
+import {getPublicKey} from './keys'
+
+export type Parameters = {
+  pubkey: string // the key to whom the delegation will be given
+  kind: number | undefined
+  until: number | undefined // delegation will only be valid until this date
+  since: number | undefined // delegation will be valid from this date on
+}
+
+export type Delegation = {
+  from: string // the pubkey who signed the delegation
+  to: string // the pubkey that is allowed to use the delegation
+  cond: string // the string of conditions as they should be included in the event tag
+  sig: string
+}
+
+export function createDelegation(
+  privateKey: string,
+  parameters: Parameters
+): Delegation {
+  let conditions = []
+  if ((parameters.kind || -1) >= 0) conditions.push(`kind=${parameters.kind}`)
+  if (parameters.until) conditions.push(`created_at<${parameters.until}`)
+  if (parameters.since) conditions.push(`created_at>${parameters.since}`)
+  let cond = conditions.join('&')
+
+  if (cond === '')
+    throw new Error('refusing to create a delegation without any conditions')
+
+  let sighash = sha256(
+    utf8Encoder.encode(`nostr:delegation:${parameters.pubkey}:${cond}`)
+  )
+
+  let sig = secp256k1.utils.bytesToHex(
+    secp256k1.schnorr.signSync(sighash, privateKey)
+  )
+
+  return {
+    from: getPublicKey(privateKey),
+    to: parameters.pubkey,
+    cond,
+    sig
+  }
+}
+
+export function getDelegator(event: Event): string | null {
+  // find delegation tag
+  let tag = event.tags.find(tag => tag[0] === 'delegation' && tag.length >= 4)
+  if (!tag) return null
+
+  let pubkey = tag[1]
+  let cond = tag[2]
+  let sig = tag[3]
+
+  // check conditions
+  let conditions = cond.split('&')
+  for (let i = 0; i < conditions.length; i++) {
+    let [key, operator, value] = conditions[i].split(/\b/)
+
+    // the supported conditions are just 'kind' and 'created_at' for now
+    if (key === 'kind' && operator === '=' && event.kind === parseInt(value))
+      continue
+    else if (
+      key === 'created_at' &&
+      operator === '<' &&
+      event.created_at < parseInt(value)
+    )
+      continue
+    else if (
+      key === 'created_at' &&
+      operator === '>' &&
+      event.created_at > parseInt(value)
+    )
+      continue
+    else return null // invalid condition
+  }
+
+  // check signature
+  let sighash = sha256(
+    utf8Encoder.encode(`nostr:delegation:${event.pubkey}:${cond}`)
+  )
+  if (!secp256k1.schnorr.verifySync(sig, sighash, pubkey)) return null
+
+  return pubkey
+}

nip39.test.js

@@ -0,0 +1,15 @@
+/* eslint-env jest */
+
+const fetch = require('node-fetch')
+const {nip39} = require('./lib/nostr.cjs.js')
+
+test('validate github claim', async () => {
+  nip39.useFetchImplementation(fetch)
+
+  let result = await nip39.validateGithub(
+    'npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z',
+    'vitorpamplona',
+    'cf19e2d1d7f8dac6348ad37b35ec8421'
+  )
+  expect(result).toBe(true)
+})

nip39.ts

@@ -0,0 +1,27 @@
+var _fetch: any
+
+try {
+  _fetch = fetch
+} catch {}
+
+export function useFetchImplementation(fetchImplementation: any) {
+  _fetch = fetchImplementation
+}
+
+export async function validateGithub(
+  pubkey: string,
+  username: string,
+  proof: string
+): Promise<boolean> {
+  try {
+    let res = await (
+      await _fetch(`https://gist.github.com/${username}/${proof}/raw`)
+    ).text()
+    return (
+      res ===
+      `Verifying that I control the following Nostr public key: ${pubkey}`
+    )
+  } catch (_) {
+    return false
+  }
+}

nip57.ts

@@ -0,0 +1,138 @@
+import {bech32} from '@scure/base'
+
+import {Event, EventTemplate, validateEvent, verifySignature} from './event'
+import {utf8Decoder} from './utils'
+
+var _fetch: any
+
+try {
+  _fetch = fetch
+} catch {}
+
+export function useFetchImplementation(fetchImplementation: any) {
+  _fetch = fetchImplementation
+}
+
+export async function getZapEndpoint(metadata: Event): Promise<null | string> {
+  try {
+    let lnurl: string = ''
+    let {lud06, lud16} = JSON.parse(metadata.content)
+    if (lud06) {
+      let {words} = bech32.decode(lud06, 1000)
+      let data = bech32.fromWords(words)
+      lnurl = utf8Decoder.decode(data)
+    } else if (lud16) {
+      let [name, domain] = lud16.split('@')
+      lnurl = `https://${domain}/.well-known/lnurlp/${name}`
+    } else {
+      return null
+    }
+
+    let res = await _fetch(lnurl)
+    let body = await res.json()
+
+    if (body.allowsNostr && body.nostrPubkey) {
+      return body.callback
+    }
+  } catch (err) {
+    /*-*/
+  }
+
+  return null
+}
+
+export function makeZapRequest({
+  profile,
+  event,
+  amount,
+  relays,
+  comment = ''
+}: {
+  profile: string
+  event: string | null
+  amount: number
+  comment: string
+  relays: string[]
+}): EventTemplate {
+  if (!amount) throw new Error('amount not given')
+  if (!profile) throw new Error('profile not given')
+
+  let zr = {
+    kind: 9734,
+    created_at: Math.round(Date.now() / 1000),
+    content: comment,
+    tags: [
+      ['p', profile],
+      ['amount', amount.toString()],
+      ['relays', ...relays]
+    ]
+  }
+
+  if (event) {
+    zr.tags.push(['e', event])
+  }
+
+  return zr
+}
+
+export function validateZapRequest(zapRequestString: string): string | null {
+  let zapRequest: Event
+
+  try {
+    zapRequest = JSON.parse(zapRequestString)
+  } catch (err) {
+    return 'Invalid zap request JSON.'
+  }
+
+  if (!validateEvent(zapRequest))
+    return 'Zap request is not a valid Nostr event.'
+  if (!verifySignature(zapRequest)) return 'Invalid signature on zap request.'
+
+  let p = zapRequest.tags.find(([t, v]) => t === 'p' && v)
+  if (!p) return "Zap request doesn't have a 'p' tag."
+  if (!p[1].match(/^[a-f0-9]{64}$/))
+    return "Zap request 'p' tag is not valid hex."
+
+  let e = zapRequest.tags.find(([t, v]) => t === 'e' && v)
+  if (e && !e[1].match(/^[a-f0-9]{64}$/))
+    return "Zap request 'e' tag is not valid hex."
+
+  let relays = zapRequest.tags.find(([t, v]) => t === 'relays' && v)
+  if (!relays) return "Zap request doesn't have a 'relays' tag."
+
+  return null
+}
+
+export function makeZapReceipt({
+  zapRequest,
+  preimage,
+  bolt11,
+  paidAt
+}: {
+  zapRequest: string
+  preimage: string | null
+  bolt11: string
+  paidAt: Date
+}): EventTemplate {
+  let zr: Event = JSON.parse(zapRequest)
+  let tagsFromZapRequest = zr.tags.filter(
+    ([t]) => t === 'e' || t === 'p' || t === 'a'
+  )
+
+  let zap = {
+    kind: 9735,
+    created_at: Math.round(paidAt.getTime() / 1000),
+    content: '',
+    tags: [
+      ...tagsFromZapRequest,
+      ['bolt11', bolt11],
+      ['description', zapRequest]
+    ]
+  }
+
+  if (preimage) {
+    zap.tags.push(['preimage', preimage])
+  }
+
+  return zap
+}

package.json

@@ -1,20 +1,29 @@
 {
   "name": "nostr-tools",
-  "version": "1.0.0-rc1",
+  "version": "1.8.0",
   "description": "Tools for making a Nostr client.",
   "repository": {
     "type": "git",
-    "url": "https://github.com/fiatjaf/nostr-tools.git"
+    "url": "https://github.com/nbd-wtf/nostr-tools.git"
   },
+  "files": [
+    "./lib/**/*"
+  ],
+  "types": "./lib/index.d.ts",
   "main": "lib/nostr.cjs.js",
-  "module": "lib/nostr.esm.js",
+  "module": "lib/esm/nostr.mjs",
+  "exports": {
+    "import": "./lib/esm/nostr.mjs",
+    "require": "./lib/nostr.cjs.js"
+  },
+  "license": "Public domain",
   "dependencies": {
-    "@noble/hashes": "^0.5.7",
+    "@noble/hashes": "1.0.0",
-    "@noble/secp256k1": "^1.7.0",
+    "@noble/secp256k1": "^1.7.1",
-    "@scure/bip32": "^1.1.1",
+    "@scure/base": "^1.1.1",
-    "@scure/bip39": "^1.1.0",
+    "@scure/bip32": "^1.1.5",
-    "base64-arraybuffer": "^1.0.2",
+    "@scure/bip39": "^1.1.1",
-    "bech32": "^2.0.0"
+    "prettier": "^2.8.4"
   },
   "keywords": [
     "decentralization",
@@ -24,25 +33,20 @@
     "nostr"
   ],
   "devDependencies": {
-    "@types/node": "^18.0.3",
+    "@types/node": "^18.13.0",
-    "@typescript-eslint/eslint-plugin": "^5.46.1",
+    "@typescript-eslint/eslint-plugin": "^5.51.0",
-    "@typescript-eslint/parser": "^5.46.1",
+    "@typescript-eslint/parser": "^5.51.0",
     "esbuild": "0.16.9",
     "esbuild-plugin-alias": "^0.2.1",
-    "eslint": "^8.30.0",
+    "eslint": "^8.33.0",
     "eslint-plugin-babel": "^5.3.1",
-    "esm-loader-typescript": "^1.0.1",
+    "esm-loader-typescript": "^1.0.3",
     "events": "^3.3.0",
-    "jest": "^29.3.1",
+    "jest": "^29.4.2",
-    "node-fetch": "2",
+    "node-fetch": "^2.6.9",
-    "ts-jest": "^29.0.3",
+    "ts-jest": "^29.0.5",
     "tsd": "^0.22.0",
-    "typescript": "^4.9.4",
+    "typescript": "^4.9.5",
     "websocket-polyfill": "^0.0.3"
-  },
-  "scripts": {
-    "build": "node build.js",
-    "pretest": "node build.js",
-    "test": "jest"
   }
 }

pool.test.js

@@ -0,0 +1,133 @@
+/* eslint-env jest */
+
+require('websocket-polyfill')
+const {
+  SimplePool,
+  generatePrivateKey,
+  getPublicKey,
+  getEventHash,
+  signEvent
+} = require('./lib/nostr.cjs')
+
+let pool = new SimplePool()
+
+let relays = [
+  'wss://relay.damus.io/',
+  'wss://relay.nostr.bg/',
+  'wss://nostr.fmt.wiz.biz/',
+  'wss://relay.nostr.band/',
+  'wss://nos.lol/'
+]
+
+afterAll(() => {
+  pool.close([
+    ...relays,
+    'wss://nostr.wine',
+    'wss://offchain.pub',
+    'wss://eden.nostr.land'
+  ])
+})
+
+test('removing duplicates when querying', async () => {
+  let priv = generatePrivateKey()
+  let pub = getPublicKey(priv)
+
+  let sub = pool.sub(relays, [{authors: [pub]}])
+  let received = []
+
+  sub.on('event', event => {
+    // this should be called only once even though we're listening
+    // to multiple relays because the events will be catched and
+    // deduplicated efficiently (without even being parsed)
+    received.push(event)
+  })
+
+  let event = {
+    pubkey: pub,
+    created_at: Math.round(Date.now() / 1000),
+    content: 'test',
+    kind: 22345,
+    tags: []
+  }
+  event.id = getEventHash(event)
+  event.sig = signEvent(event, priv)
+
+  pool.publish(relays, event)
+
+  await new Promise(resolve => setTimeout(resolve, 1500))
+
+  expect(received).toHaveLength(1)
+})
+
+test('same with double querying', async () => {
+  let priv = generatePrivateKey()
+  let pub = getPublicKey(priv)
+
+  let sub1 = pool.sub(relays, [{authors: [pub]}])
+  let sub2 = pool.sub(relays, [{authors: [pub]}])
+
+  let received = []
+
+  sub1.on('event', event => {
+    received.push(event)
+  })
+
+  sub2.on('event', event => {
+    received.push(event)
+  })
+
+  let event = {
+    pubkey: pub,
+    created_at: Math.round(Date.now() / 1000),
+    content: 'test2',
+    kind: 22346,
+    tags: []
+  }
+  event.id = getEventHash(event)
+  event.sig = signEvent(event, priv)
+
+  pool.publish(relays, event)
+
+  await new Promise(resolve => setTimeout(resolve, 1500))
+
+  expect(received).toHaveLength(2)
+})
+
+test('get()', async () => {
+  let event = await pool.get(relays, {
+    ids: ['d7dd5eb3ab747e16f8d0212d53032ea2a7cadef53837e5a6c66d42849fcb9027']
+  })
+
+  expect(event).toHaveProperty(
+    'id',
+    'd7dd5eb3ab747e16f8d0212d53032ea2a7cadef53837e5a6c66d42849fcb9027'
+  )
+})
+
+test('list()', async () => {
+  let events = await pool.list(
+    [...relays, 'wss://offchain.pub', 'wss://eden.nostr.land'],
+    [
+      {
+        authors: [
+          '3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d'
+        ],
+        kinds: [1],
+        limit: 2
+      }
+    ]
+  )
+
+  // the actual received number will be greater than 2, but there will be no duplicates
+  expect(events.length).toEqual(
+    events
+      .map(evt => evt.id)
+      .reduce((acc, n) => (acc.indexOf(n) !== -1 ? acc : [...acc, n]), [])
+      .length
+  )
+
+  let relaysForAllEvents = events
+    .map(event => pool.seenOn(event.id))
+    .reduce((acc, n) => acc.concat(n), [])
+  expect(relaysForAllEvents.length).toBeGreaterThanOrEqual(events.length)
+})

pool.ts

@@ -0,0 +1,191 @@
+import {Relay, relayInit} from './relay'
+import {normalizeURL} from './utils'
+import {Filter} from './filter'
+import {Event} from './event'
+import {SubscriptionOptions, Sub, Pub} from './relay'
+
+export class SimplePool {
+  private _conn: {[url: string]: Relay}
+  private _seenOn: {[id: string]: Set<string>} = {} // a map of all events we've seen in each relay
+
+  private eoseSubTimeout: number
+  private getTimeout: number
+
+  constructor(options: {eoseSubTimeout?: number; getTimeout?: number} = {}) {
+    this._conn = {}
+    this.eoseSubTimeout = options.eoseSubTimeout || 3400
+    this.getTimeout = options.getTimeout || 3400
+  }
+
+  close(relays: string[]): void {
+    relays.forEach(url => {
+      let relay = this._conn[normalizeURL(url)]
+      if (relay) relay.close()
+    })
+  }
+
+  async ensureRelay(url: string): Promise<Relay> {
+    const nm = normalizeURL(url)
+    const existing = this._conn[nm]
+    if (existing && existing.status === 1) return existing
+
+    if (existing) {
+      await existing.connect()
+      return existing
+    }
+
+    const relay = relayInit(nm, {
+      getTimeout: this.getTimeout * 0.9,
+      listTimeout: this.getTimeout * 0.9
+    })
+    this._conn[nm] = relay
+
+    await relay.connect()
+
+    return relay
+  }
+
+  sub(relays: string[], filters: Filter[], opts?: SubscriptionOptions): Sub {
+    let _knownIds: Set<string> = new Set()
+    let modifiedOpts = {...(opts || {})}
+    modifiedOpts.alreadyHaveEvent = (id, url) => {
+      if (opts?.alreadyHaveEvent?.(id, url)) {
+        return true
+      }
+      let set = this._seenOn[id] || new Set()
+      set.add(url)
+      this._seenOn[id] = set
+      _knownIds.add(id)
+      return _knownIds.has(id)
+    }
+
+    let subs: Sub[] = []
+    let eventListeners: Set<(event: Event) => void> = new Set()
+    let eoseListeners: Set<() => void> = new Set()
+    let eosesMissing = relays.length
+
+    let eoseSent = false
+    let eoseTimeout = setTimeout(() => {
+      eoseSent = true
+      for (let cb of eoseListeners.values()) cb()
+    }, this.eoseSubTimeout)
+
+    relays.forEach(async relay => {
+      let r
+      try {
+        r = await this.ensureRelay(relay)
+      } catch (err) {
+        handleEose()
+        return
+      }
+      if (!r) return
+      let s = r.sub(filters, modifiedOpts)
+      s.on('event', (event: Event) => {
+        for (let cb of eventListeners.values()) cb(event)
+      })
+      s.on('eose', () => {
+        if (eoseSent) return
+        handleEose()
+      })
+      subs.push(s)
+
+      function handleEose() {
+        eosesMissing--
+        if (eosesMissing === 0) {
+          clearTimeout(eoseTimeout)
+          for (let cb of eoseListeners.values()) cb()
+        }
+      }
+    })
+
+    let greaterSub: Sub = {
+      sub(filters, opts) {
+        subs.forEach(sub => sub.sub(filters, opts))
+        return greaterSub
+      },
+      unsub() {
+        subs.forEach(sub => sub.unsub())
+      },
+      on(type, cb) {
+        if (type === 'event') {
+          eventListeners.add(cb)
+        } else if (type === 'eose') {
+          eoseListeners.add(cb as () => void | Promise<void>)
+        }
+      },
+      off(type, cb) {
+        if (type === 'event') {
+          eventListeners.delete(cb)
+        } else if (type === 'eose')
+          eoseListeners.delete(cb as () => void | Promise<void>)
+      }
+    }
+
+    return greaterSub
+  }
+
+  get(
+    relays: string[],
+    filter: Filter,
+    opts?: SubscriptionOptions
+  ): Promise<Event | null> {
+    return new Promise(resolve => {
+      let sub = this.sub(relays, [filter], opts)
+      let timeout = setTimeout(() => {
+        sub.unsub()
+        resolve(null)
+      }, this.getTimeout)
+      sub.on('event', (event: Event) => {
+        resolve(event)
+        clearTimeout(timeout)
+        sub.unsub()
+      })
+    })
+  }
+
+  list(
+    relays: string[],
+    filters: Filter[],
+    opts?: SubscriptionOptions
+  ): Promise<Event[]> {
+    return new Promise(resolve => {
+      let events: Event[] = []
+      let sub = this.sub(relays, filters, opts)
+
+      sub.on('event', (event: Event) => {
+        events.push(event)
+      })
+
+      // we can rely on an eose being emitted here because pool.sub() will fake one
+      sub.on('eose', () => {
+        sub.unsub()
+        resolve(events)
+      })
+    })
+  }
+
+  publish(relays: string[], event: Event): Pub {
+    const pubs: Pub[] = []
+    relays.forEach(async relay => {
+      let r
+      try {
+        r = await this.ensureRelay(relay)
+        pubs.push(r.publish(event))
+      } catch (_) {}
+    })
+    return {
+      on(type, cb) {
+        pubs.forEach((pub, i) => {
+          pub.on(type, () => cb(relays[i]))
+        })
+      },
+      off() {
+        // do nothing here, FIXME
+      }
+    }
+  }
+
+  seenOn(id: string): string[] {
+    return Array.from(this._seenOn[id]?.values?.() || [])
+  }
+}

references.test.js

@@ -0,0 +1,62 @@
+/* eslint-env jest */
+
+const {parseReferences} = require('./lib/nostr.cjs')
+
+test('parse mentions', () => {
+  let evt = {
+    tags: [
+      [
+        'p',
+        'c9d556c6d3978d112d30616d0d20aaa81410e3653911dd67787b5aaf9b36ade8',
+        'wss://nostr.com'
+      ],
+      [
+        'e',
+        'a84c5de86efc2ec2cff7bad077c4171e09146b633b7ad117fffe088d9579ac33',
+        'wss://other.com',
+        'reply'
+      ],
+      [
+        'e',
+        '31d7c2875b5fc8e6f9c8f9dc1f84de1b6b91d1947ea4c59225e55c325d330fa8',
+        ''
+      ]
+    ],
+    content:
+      'hello #[0], have you seen #[2]? it was made by nostr:nprofile1qqsvc6ulagpn7kwrcwdqgp797xl7usumqa6s3kgcelwq6m75x8fe8yc5usxdg on nostr:nevent1qqsvc6ulagpn7kwrcwdqgp797xl7usumqa6s3kgcelwq6m75x8fe8ychxp5v4! broken #[3]'
+  }
+
+  expect(parseReferences(evt)).toEqual([
+    {
+      text: '#[0]',
+      profile: {
+        pubkey:
+          'c9d556c6d3978d112d30616d0d20aaa81410e3653911dd67787b5aaf9b36ade8',
+        relays: ['wss://nostr.com']
+      }
+    },
+    {
+      text: '#[2]',
+      event: {
+        id: '31d7c2875b5fc8e6f9c8f9dc1f84de1b6b91d1947ea4c59225e55c325d330fa8',
+        relays: []
+      }
+    },
+    {
+      text: 'nostr:nprofile1qqsvc6ulagpn7kwrcwdqgp797xl7usumqa6s3kgcelwq6m75x8fe8yc5usxdg',
+      profile: {
+        pubkey:
+          'cc6b9fea033f59c3c39a0407c5f1bfee439b077508d918cfdc0d6fd431d39393',
+        relays: []
+      }
+    },
+    {
+      text: 'nostr:nevent1qqsvc6ulagpn7kwrcwdqgp797xl7usumqa6s3kgcelwq6m75x8fe8ychxp5v4',
+      event: {
+        id: 'cc6b9fea033f59c3c39a0407c5f1bfee439b077508d918cfdc0d6fd431d39393',
+        relays: [],
+        author: undefined
+      }
+    }
+  ])
+})

references.ts

@@ -0,0 +1,104 @@
+import {Event} from './event'
+import {decode, AddressPointer, ProfilePointer, EventPointer} from './nip19'
+
+type Reference = {
+  text: string
+  profile?: ProfilePointer
+  event?: EventPointer
+  address?: AddressPointer
+}
+
+const mentionRegex =
+  /\bnostr:((note|npub|naddr|nevent|nprofile)1\w+)\b|#\[(\d+)\]/g
+
+export function parseReferences(evt: Event): Reference[] {
+  let references: Reference[] = []
+  for (let ref of evt.content.matchAll(mentionRegex)) {
+    if (ref[2]) {
+      // it's a NIP-27 mention
+      try {
+        let {type, data} = decode(ref[1])
+        switch (type) {
+          case 'npub': {
+            references.push({
+              text: ref[0],
+              profile: {pubkey: data as string, relays: []}
+            })
+            break
+          }
+          case 'nprofile': {
+            references.push({
+              text: ref[0],
+              profile: data as ProfilePointer
+            })
+            break
+          }
+          case 'note': {
+            references.push({
+              text: ref[0],
+              event: {id: data as string, relays: []}
+            })
+            break
+          }
+          case 'nevent': {
+            references.push({
+              text: ref[0],
+              event: data as EventPointer
+            })
+            break
+          }
+          case 'naddr': {
+            references.push({
+              text: ref[0],
+              address: data as AddressPointer
+            })
+            break
+          }
+        }
+      } catch (err) {
+        /***/
+      }
+    } else if (ref[3]) {
+      // it's a NIP-10 mention
+      let idx = parseInt(ref[3], 10)
+      let tag = evt.tags[idx]
+      if (!tag) continue
+
+      switch (tag[0]) {
+        case 'p': {
+          references.push({
+            text: ref[0],
+            profile: {pubkey: tag[1], relays: tag[2] ? [tag[2]] : []}
+          })
+          break
+        }
+        case 'e': {
+          references.push({
+            text: ref[0],
+            event: {id: tag[1], relays: tag[2] ? [tag[2]] : []}
+          })
+          break
+        }
+        case 'a': {
+          try {
+            let [kind, pubkey, identifier] = ref[1].split(':')
+            references.push({
+              text: ref[0],
+              address: {
+                identifier,
+                pubkey,
+                kind: parseInt(kind, 10),
+                relays: tag[2] ? [tag[2]] : []
+              }
+            })
+          } catch (err) {
+            /***/
+          }
+          break
+        }
+      }
+    }
+  }
+
+  return references
+}

relay.test.js

@@ -9,14 +9,14 @@ const {
   signEvent
 } = require('./lib/nostr.cjs')
 
-let relay = relayInit('wss://nostr-pub.semisol.dev/')
+let relay = relayInit('wss://relay.damus.io/')
 
 beforeAll(() => {
   relay.connect()
 })
 
-afterAll(async () => {
+afterAll(() => {
-  await relay.close()
+  relay.close()
 })
 
 test('connectivity', () => {
@@ -32,7 +32,7 @@ test('connectivity', () => {
   ).resolves.toBe(true)
 })
 
-test('querying', () => {
+test('querying', async () => {
   var resolve1
   var resolve2
 
@@ -52,8 +52,7 @@ test('querying', () => {
     resolve2(true)
   })
 
-  return expect(
+  let [t1, t2] = await Promise.all([
-    Promise.all([
     new Promise(resolve => {
       resolve1 = resolve
     }),
@@ -61,7 +60,34 @@ test('querying', () => {
       resolve2 = resolve
     })
   ])
-  ).resolves.toEqual([true, true])
+
+  expect(t1).toEqual(true)
+  expect(t2).toEqual(true)
+})
+
+test('get()', async () => {
+  let event = await relay.get({
+    ids: ['d7dd5eb3ab747e16f8d0212d53032ea2a7cadef53837e5a6c66d42849fcb9027']
+  })
+
+  expect(event).toHaveProperty(
+    'id',
+    'd7dd5eb3ab747e16f8d0212d53032ea2a7cadef53837e5a6c66d42849fcb9027'
+  )
+})
+
+test('list()', async () => {
+  let events = await relay.list([
+    {
+      authors: [
+        '3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d'
+      ],
+      kinds: [1],
+      limit: 2
+    }
+  ])
+
+  expect(events.length).toEqual(2)
 })
 
 test('listening (twice) and publishing', async () => {
@@ -98,7 +124,7 @@ test('listening (twice) and publishing', async () => {
     content: 'nostr-tools test suite'
   }
   event.id = getEventHash(event)
-  event.sig = await signEvent(event, sk)
+  event.sig = signEvent(event, sk)
 
   relay.publish(event)
   return expect(

relay.ts

@@ -2,54 +2,78 @@
 
 import {Event, verifySignature, validateEvent} from './event'
 import {Filter, matchFilters} from './filter'
+import {getHex64, getSubscriptionId} from './fakejson'
 
+type RelayEvent = {
+  connect: () => void | Promise<void>
+  disconnect: () => void | Promise<void>
+  error: () => void | Promise<void>
+  notice: (msg: string) => void | Promise<void>
+}
+type SubEvent = {
+  event: (event: Event) => void | Promise<void>
+  eose: () => void | Promise<void>
+}
 export type Relay = {
   url: string
   status: number
-  connect: () => void
+  connect: () => Promise<void>
   close: () => void
-  sub: (filters: Filter[], opts: SubscriptionOptions) => Sub
+  sub: (filters: Filter[], opts?: SubscriptionOptions) => Sub
+  list: (filters: Filter[], opts?: SubscriptionOptions) => Promise<Event[]>
+  get: (filter: Filter, opts?: SubscriptionOptions) => Promise<Event | null>
   publish: (event: Event) => Pub
-  on: (type: 'connect' | 'disconnect' | 'notice', cb: any) => void
+  off: <T extends keyof RelayEvent, U extends RelayEvent[T]>(
-  off: (type: 'connect' | 'disconnect' | 'notice', cb: any) => void
+    event: T,
+    listener: U
+  ) => void
+  on: <T extends keyof RelayEvent, U extends RelayEvent[T]>(
+    event: T,
+    listener: U
+  ) => void
 }
 export type Pub = {
-  on: (type: 'ok' | 'seen' | 'failed', cb: any) => void
+  on: (type: 'ok' | 'failed', cb: any) => void
-  off: (type: 'ok' | 'seen' | 'failed', cb: any) => void
+  off: (type: 'ok' | 'failed', cb: any) => void
 }
 export type Sub = {
   sub: (filters: Filter[], opts: SubscriptionOptions) => Sub
   unsub: () => void
-  on: (type: 'event' | 'eose', cb: any) => void
+  on: <T extends keyof SubEvent, U extends SubEvent[T]>(
-  off: (type: 'event' | 'eose', cb: any) => void
+    event: T,
+    listener: U
+  ) => void
+  off: <T extends keyof SubEvent, U extends SubEvent[T]>(
+    event: T,
+    listener: U
+  ) => void
 }
 
-type SubscriptionOptions = {
+export type SubscriptionOptions = {
-  skipVerification?: boolean
   id?: string
+  skipVerification?: boolean
+  alreadyHaveEvent?: null | ((id: string, relay: string) => boolean)
 }
 
-export function relayInit(url: string): Relay {
+export function relayInit(
+  url: string,
+  options: {
+    getTimeout?: number
+    listTimeout?: number
+  } = {}
+): Relay {
+  let {listTimeout = 3000, getTimeout = 3000} = options
+
   var ws: WebSocket
-  var resolveClose: () => void
-  var untilOpen: Promise<void>
   var openSubs: {[id: string]: {filters: Filter[]} & SubscriptionOptions} = {}
-  var listeners: {
+  var listeners: {[TK in keyof RelayEvent]: RelayEvent[TK][]} = {
-    connect: Array<() => void>
-    disconnect: Array<() => void>
-    error: Array<() => void>
-    notice: Array<(msg: string) => void>
-  } = {
     connect: [],
     disconnect: [],
     error: [],
     notice: []
   }
   var subListeners: {
-    [subid: string]: {
+    [subid: string]: {[TK in keyof SubEvent]: SubEvent[TK][]}
-      event: Array<(event: Event) => void>
-      eose: Array<() => void>
-    }
   } = {}
   var pubListeners: {
     [eventid: string]: {
@@ -61,7 +85,11 @@ export function relayInit(url: string): Relay {
 
   async function connectRelay(): Promise<void> {
     return new Promise((resolve, reject) => {
+      try {
         ws = new WebSocket(url)
+      } catch (err) {
+        reject(err)
+      }
 
       ws.onopen = () => {
         listeners.connect.forEach(cb => cb())
@@ -73,22 +101,48 @@ export function relayInit(url: string): Relay {
       }
       ws.onclose = async () => {
         listeners.disconnect.forEach(cb => cb())
-        resolveClose()
       }
 
-      ws.onmessage = async e => {
+      let incomingMessageQueue: string[] = []
-        var data
+      let handleNextInterval: any
+
+      ws.onmessage = e => {
+        incomingMessageQueue.push(e.data)
+        if (!handleNextInterval) {
+          handleNextInterval = setInterval(handleNext, 0)
+        }
+      }
+
+      function handleNext() {
+        if (incomingMessageQueue.length === 0) {
+          clearInterval(handleNextInterval)
+          handleNextInterval = null
+          return
+        }
+
+        var json = incomingMessageQueue.shift()
+        if (!json) return
+
+        let subid = getSubscriptionId(json)
+        if (subid) {
+          let so = openSubs[subid]
+          if (
+            so &&
+            so.alreadyHaveEvent &&
+            so.alreadyHaveEvent(getHex64(json, 'id'), url)
+          ) {
+            return
+          }
+        }
+
         try {
-          data = JSON.parse(e.data)
+          let data = JSON.parse(json)
-        } catch (err) {
+
-          data = e.data
+          // we won't do any checks against the data since all failures (i.e. invalid messages from relays)
-        }
+          // will naturally be caught by the encompassing try..catch block
 
-        if (data.length >= 1) {
           switch (data[0]) {
             case 'EVENT':
-              if (data.length !== 3) return // ignore empty or malformed EVENT
-
               let id = data[1]
               let event = data[2]
               if (
@@ -98,51 +152,70 @@ export function relayInit(url: string): Relay {
                 matchFilters(openSubs[id].filters, event)
               ) {
                 openSubs[id]
-                subListeners[id]?.event.forEach(cb => cb(event))
+                ;(subListeners[id]?.event || []).forEach(cb => cb(event))
               }
               return
             case 'EOSE': {
-              if (data.length !== 2) return // ignore empty or malformed EOSE
               let id = data[1]
-              subListeners[id]?.eose.forEach(cb => cb())
+              if (id in subListeners) {
+                subListeners[id].eose.forEach(cb => cb())
+                subListeners[id].eose = [] // 'eose' only happens once per sub, so stop listeners here
+              }
               return
             }
             case 'OK': {
-              if (data.length < 3) return // ignore empty or malformed OK
               let id: string = data[1]
               let ok: boolean = data[2]
               let reason: string = data[3] || ''
-              if (ok) pubListeners[id]?.ok.forEach(cb => cb())
+              if (id in pubListeners) {
-              else pubListeners[id]?.failed.forEach(cb => cb(reason))
+                if (ok) pubListeners[id].ok.forEach(cb => cb())
+                else pubListeners[id].failed.forEach(cb => cb(reason))
+                pubListeners[id].ok = [] // 'ok' only happens once per pub, so stop listeners here
+                pubListeners[id].failed = []
+              }
               return
             }
             case 'NOTICE':
-              if (data.length !== 2) return // ignore empty or malformed NOTICE
               let notice = data[1]
               listeners.notice.forEach(cb => cb(notice))
               return
           }
+        } catch (err) {
+          return
         }
       }
     })
   }
 
+  function connected() {
+    return ws?.readyState === 1
+  }
+
   async function connect(): Promise<void> {
-    if (ws?.readyState && ws.readyState === 1) return // ws already open
+    if (connected()) return // ws already open
     await connectRelay()
   }
 
   async function trySend(params: [string, ...any]) {
     let msg = JSON.stringify(params)
-
+    if (!connected()) {
-    await untilOpen
+      await new Promise(resolve => setTimeout(resolve, 1000))
+      if (!connected()) {
+        return
+      }
+    }
+    try {
       ws.send(msg)
+    } catch (err) {
+      console.log(err)
+    }
   }
 
   const sub = (
     filters: Filter[],
     {
       skipVerification = false,
+      alreadyHaveEvent = null,
       id = Math.random().toString().slice(2)
     }: SubscriptionOptions = {}
   ): Sub => {
@@ -151,7 +224,8 @@ export function relayInit(url: string): Relay {
     openSubs[subid] = {
       id: subid,
       filters,
-      skipVerification
+      skipVerification,
+      alreadyHaveEvent
     }
     trySend(['REQ', subid, ...filters])
 
@@ -159,6 +233,7 @@ export function relayInit(url: string): Relay {
       sub: (newFilters, newOpts = {}) =>
         sub(newFilters || filters, {
           skipVerification: newOpts.skipVerification || skipVerification,
+          alreadyHaveEvent: newOpts.alreadyHaveEvent || alreadyHaveEvent,
           id: subid
         }),
       unsub: () => {
@@ -166,16 +241,23 @@ export function relayInit(url: string): Relay {
         delete subListeners[subid]
         trySend(['CLOSE', subid])
       },
-      on: (type: 'event' | 'eose', cb: any): void => {
+      on: <T extends keyof SubEvent, U extends SubEvent[T]>(
+        type: T,
+        cb: U
+      ): void => {
         subListeners[subid] = subListeners[subid] || {
           event: [],
           eose: []
         }
         subListeners[subid][type].push(cb)
       },
-      off: (type: 'event' | 'eose', cb: any): void => {
+      off: <T extends keyof SubEvent, U extends SubEvent[T]>(
-        let idx = subListeners[subid][type].indexOf(cb)
+        type: T,
-        if (idx >= 0) subListeners[subid][type].splice(idx, 1)
+        cb: U
+      ): void => {
+        let listeners = subListeners[subid]
+        let idx = listeners[type].indexOf(cb)
+        if (idx >= 0) listeners[type].splice(idx, 1)
       }
     }
   }
@@ -183,81 +265,83 @@ export function relayInit(url: string): Relay {
   return {
     url,
     sub,
-    on: (
+    on: <T extends keyof RelayEvent, U extends RelayEvent[T]>(
-      type: 'connect' | 'disconnect' | 'error' | 'notice',
+      type: T,
-      cb: any
+      cb: U
     ): void => {
       listeners[type].push(cb)
       if (type === 'connect' && ws?.readyState === 1) {
-        cb()
+        // i would love to know why we need this
+        ;(cb as () => void)()
       }
     },
-    off: (
+    off: <T extends keyof RelayEvent, U extends RelayEvent[T]>(
-      type: 'connect' | 'disconnect' | 'error' | 'notice',
+      type: T,
-      cb: any
+      cb: U
     ): void => {
       let index = listeners[type].indexOf(cb)
       if (index !== -1) listeners[type].splice(index, 1)
     },
+    list: (filters: Filter[], opts?: SubscriptionOptions): Promise<Event[]> =>
+      new Promise(resolve => {
+        let s = sub(filters, opts)
+        let events: Event[] = []
+        let timeout = setTimeout(() => {
+          s.unsub()
+          resolve(events)
+        }, listTimeout)
+        s.on('eose', () => {
+          s.unsub()
+          clearTimeout(timeout)
+          resolve(events)
+        })
+        s.on('event', (event: Event) => {
+          events.push(event)
+        })
+      }),
+    get: (filter: Filter, opts?: SubscriptionOptions): Promise<Event | null> =>
+      new Promise(resolve => {
+        let s = sub([filter], opts)
+        let timeout = setTimeout(() => {
+          s.unsub()
+          resolve(null)
+        }, getTimeout)
+        s.on('event', (event: Event) => {
+          s.unsub()
+          clearTimeout(timeout)
+          resolve(event)
+        })
+      }),
     publish(event: Event): Pub {
       if (!event.id) throw new Error(`event ${event} has no id`)
       let id = event.id
 
-      var sent = false
-      var mustMonitor = false
-
       trySend(['EVENT', event])
-        .then(() => {
-          sent = true
-          if (mustMonitor) {
-            startMonitoring()
-            mustMonitor = false
-          }
-        })
-        .catch(() => {})
-
-      const startMonitoring = () => {
-        let monitor = sub([{ids: [id]}], {
-          id: `monitor-${id.slice(0, 5)}`
-        })
-        let willUnsub = setTimeout(() => {
-          pubListeners[id].failed.forEach(cb =>
-            cb('event not seen after 5 seconds')
-          )
-          monitor.unsub()
-        }, 5000)
-        monitor.on('event', () => {
-          clearTimeout(willUnsub)
-          pubListeners[id].seen.forEach(cb => cb())
-        })
-      }
 
       return {
-        on: (type: 'ok' | 'seen' | 'failed', cb: any) => {
+        on: (type: 'ok' | 'failed', cb: any) => {
           pubListeners[id] = pubListeners[id] || {
             ok: [],
-            seen: [],
             failed: []
           }
           pubListeners[id][type].push(cb)
-
-          if (type === 'seen') {
-            if (sent) startMonitoring()
-            else mustMonitor = true
-          }
         },
-        off: (type: 'ok' | 'seen' | 'failed', cb: any) => {
+        off: (type: 'ok' | 'failed', cb: any) => {
-          let idx = pubListeners[id][type].indexOf(cb)
+          let listeners = pubListeners[id]
-          if (idx >= 0) pubListeners[id][type].splice(idx, 1)
+          if (!listeners) return
+          let idx = listeners[type].indexOf(cb)
+          if (idx >= 0) listeners[type].splice(idx, 1)
         }
       }
     },
     connect,
-    close(): Promise<void> {
+    close(): void {
-      ws.close()
+      listeners = {connect: [], disconnect: [], error: [], notice: []}
-      return new Promise(resolve => {
+      subListeners = {}
-        resolveClose = resolve
+      pubListeners = {}
-      })
+      if (ws.readyState === WebSocket.OPEN) {
+        ws?.close()
+      }
     },
     get status() {
       return ws?.readyState ?? 3

tsconfig.json

@@ -9,7 +9,7 @@
     "skipLibCheck": true,
     "esModuleInterop": true,
     "emitDeclarationOnly": true,
-    "outDir": "dist",
+    "outDir": "lib",
     "rootDir": "."
   }
 }

utils.test.js

@@ -0,0 +1,183 @@
+/* eslint-env jest */
+
+const {utils} = require('./lib/nostr.cjs')
+
+const {insertEventIntoAscendingList, insertEventIntoDescendingList} = utils
+
+describe('inserting into a desc sorted list of events', () => {
+  test('insert into an empty list', async () => {
+    const list0 = []
+    expect(
+      insertEventIntoDescendingList(list0, {id: 'abc', created_at: 10})
+    ).toHaveLength(1)
+  })
+
+  test('insert in the beginning of a list', async () => {
+    const list0 = [{created_at: 20}, {created_at: 10}]
+    const list1 = insertEventIntoDescendingList(list0, {
+      id: 'abc',
+      created_at: 30
+    })
+    expect(list1).toHaveLength(3)
+    expect(list1[0].id).toBe('abc')
+  })
+
+  test('insert in the beginning of a list with same created_at', async () => {
+    const list0 = [{created_at: 30}, {created_at: 20}, {created_at: 10}]
+    const list1 = insertEventIntoDescendingList(list0, {
+      id: 'abc',
+      created_at: 30
+    })
+    expect(list1).toHaveLength(4)
+    expect(list1[0].id).toBe('abc')
+  })
+
+  test('insert in the middle of a list', async () => {
+    const list0 = [
+      {created_at: 30},
+      {created_at: 20},
+      {created_at: 10},
+      {created_at: 1}
+    ]
+    const list1 = insertEventIntoDescendingList(list0, {
+      id: 'abc',
+      created_at: 15
+    })
+    expect(list1).toHaveLength(5)
+    expect(list1[2].id).toBe('abc')
+  })
+
+  test('insert in the end of a list', async () => {
+    const list0 = [
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 10}
+    ]
+    const list1 = insertEventIntoDescendingList(list0, {
+      id: 'abc',
+      created_at: 5
+    })
+    expect(list1).toHaveLength(6)
+    expect(list1.slice(-1)[0].id).toBe('abc')
+  })
+
+  test('insert in the last-to-end of a list with same created_at', async () => {
+    const list0 = [
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 10}
+    ]
+    const list1 = insertEventIntoDescendingList(list0, {
+      id: 'abc',
+      created_at: 10
+    })
+    expect(list1).toHaveLength(6)
+    expect(list1.slice(-2)[0].id).toBe('abc')
+  })
+
+  test('do not insert duplicates', async () => {
+    const list0 = [
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 10, id: 'abc'}
+    ]
+    const list1 = insertEventIntoDescendingList(list0, {
+      id: 'abc',
+      created_at: 10
+    })
+    expect(list1).toHaveLength(3)
+  })
+})
+
+describe('inserting into a asc sorted list of events', () => {
+  test('insert into an empty list', async () => {
+    const list0 = []
+    expect(
+      insertEventIntoAscendingList(list0, {id: 'abc', created_at: 10})
+    ).toHaveLength(1)
+  })
+
+  test('insert in the beginning of a list', async () => {
+    const list0 = [{created_at: 10}, {created_at: 20}]
+    const list1 = insertEventIntoAscendingList(list0, {
+      id: 'abc',
+      created_at: 1
+    })
+    expect(list1).toHaveLength(3)
+    expect(list1[0].id).toBe('abc')
+  })
+
+  test('insert in the beginning of a list with same created_at', async () => {
+    const list0 = [{created_at: 10}, {created_at: 20}, {created_at: 30}]
+    const list1 = insertEventIntoAscendingList(list0, {
+      id: 'abc',
+      created_at: 10
+    })
+    expect(list1).toHaveLength(4)
+    expect(list1[0].id).toBe('abc')
+  })
+
+  test('insert in the middle of a list', async () => {
+    const list0 = [
+      {created_at: 10},
+      {created_at: 20},
+      {created_at: 30},
+      {created_at: 40}
+    ]
+    const list1 = insertEventIntoAscendingList(list0, {
+      id: 'abc',
+      created_at: 25
+    })
+    expect(list1).toHaveLength(5)
+    expect(list1[2].id).toBe('abc')
+  })
+
+  test('insert in the end of a list', async () => {
+    const list0 = [
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 40}
+    ]
+    const list1 = insertEventIntoAscendingList(list0, {
+      id: 'abc',
+      created_at: 50
+    })
+    expect(list1).toHaveLength(6)
+    expect(list1.slice(-1)[0].id).toBe('abc')
+  })
+
+  test('insert in the last-to-end of a list with same created_at', async () => {
+    const list0 = [
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 30}
+    ]
+    const list1 = insertEventIntoAscendingList(list0, {
+      id: 'abc',
+      created_at: 30
+    })
+    expect(list1).toHaveLength(6)
+    expect(list1.slice(-2)[0].id).toBe('abc')
+  })
+
+  test('do not insert duplicates', async () => {
+    const list0 = [
+      {created_at: 20},
+      {created_at: 20},
+      {created_at: 30, id: 'abc'}
+    ]
+    const list1 = insertEventIntoAscendingList(list0, {
+      id: 'abc',
+      created_at: 30
+    })
+    expect(list1).toHaveLength(3)
+  })
+})

utils.ts

@@ -1,2 +1,111 @@
+import {Event} from './event'
+
 export const utf8Decoder = new TextDecoder('utf-8')
 export const utf8Encoder = new TextEncoder()
+
+export function normalizeURL(url: string): string {
+  let p = new URL(url)
+  p.pathname = p.pathname.replace(/\/+/g, '/')
+  if (p.pathname.endsWith('/')) p.pathname = p.pathname.slice(0, -1)
+  if (
+    (p.port === '80' && p.protocol === 'ws:') ||
+    (p.port === '443' && p.protocol === 'wss:')
+  )
+    p.port = ''
+  p.searchParams.sort()
+  p.hash = ''
+  return p.toString()
+}
+
+//
+// fast insert-into-sorted-array functions adapted from https://github.com/terrymorse58/fast-sorted-array
+//
+export function insertEventIntoDescendingList(
+  sortedArray: Event[],
+  event: Event
+) {
+  let start = 0
+  let end = sortedArray.length - 1
+  let midPoint
+  let position = start
+
+  if (end < 0) {
+    position = 0
+  } else if (event.created_at < sortedArray[end].created_at) {
+    position = end + 1
+  } else if (event.created_at >= sortedArray[start].created_at) {
+    position = start
+  } else
+    while (true) {
+      if (end <= start + 1) {
+        position = end
+        break
+      }
+      midPoint = Math.floor(start + (end - start) / 2)
+      if (sortedArray[midPoint].created_at > event.created_at) {
+        start = midPoint
+      } else if (sortedArray[midPoint].created_at < event.created_at) {
+        end = midPoint
+      } else {
+        // aMidPoint === num
+        position = midPoint
+        break
+      }
+    }
+
+  // insert when num is NOT already in (no duplicates)
+  if (sortedArray[position]?.id !== event.id) {
+    return [
+      ...sortedArray.slice(0, position),
+      event,
+      ...sortedArray.slice(position)
+    ]
+  }
+
+  return sortedArray
+}
+
+export function insertEventIntoAscendingList(
+  sortedArray: Event[],
+  event: Event
+) {
+  let start = 0
+  let end = sortedArray.length - 1
+  let midPoint
+  let position = start
+
+  if (end < 0) {
+    position = 0
+  } else if (event.created_at > sortedArray[end].created_at) {
+    position = end + 1
+  } else if (event.created_at <= sortedArray[start].created_at) {
+    position = start
+  } else
+    while (true) {
+      if (end <= start + 1) {
+        position = end
+        break
+      }
+      midPoint = Math.floor(start + (end - start) / 2)
+      if (sortedArray[midPoint].created_at < event.created_at) {
+        start = midPoint
+      } else if (sortedArray[midPoint].created_at > event.created_at) {
+        end = midPoint
+      } else {
+        // aMidPoint === num
+        position = midPoint
+        break
+      }
+    }
+
+  // insert when num is NOT already in (no duplicates)
+  if (sortedArray[position]?.id !== event.id) {
+    return [
+      ...sortedArray.slice(0, position),
+      event,
+      ...sortedArray.slice(position)
+    ]
+  }
+
+  return sortedArray
+}