tag v1.8.4

Added the following badge kinds according to NIP 58
  BadgeDefinition: 30008,
  BadgeAward: 8,
  ProfileBadge: 30009,

event.ts

@@ -13,6 +13,7 @@ export enum Kind {
   EncryptedDirectMessage = 4,
   EventDeletion = 5,
   Reaction = 7,
+  BadgeAward = 8,
   ChannelCreation = 40,
   ChannelMetadata = 41,
   ChannelMessage = 42,
@@ -23,6 +24,8 @@ export enum Kind {
   Zap = 9735,
   RelayList = 10002,
   ClientAuth = 22242,
+  BadgeDefinition = 30008,
+  ProfileBadge = 30009,
   Article = 30023
 }
 
@@ -78,8 +81,10 @@ export function getEventHash(event: UnsignedEvent): string {
   return secp256k1.utils.bytesToHex(eventHash)
 }
 
-export function validateEvent(event: UnsignedEvent): boolean {
+const isRecord = (obj: unknown): obj is Record<string, unknown> => obj instanceof Object
-  if (typeof event !== 'object') return false
+
+export function validateEvent<T>(event: T): event is T & UnsignedEvent {
+  if (!isRecord(event)) return false
   if (typeof event.kind !== 'number') return false
   if (typeof event.content !== 'string') return false
   if (typeof event.created_at !== 'number') return false
@@ -98,7 +103,7 @@ export function validateEvent(event: UnsignedEvent): boolean {
   return true
 }
 
-export function verifySignature(event: Event & {sig: string}): boolean {
+export function verifySignature(event: Event): boolean {
   return secp256k1.schnorr.verifySync(
     event.sig,
     getEventHash(event),

filter.test.js

@@ -37,6 +37,16 @@ describe('Filter', () => {
       expect(result).toEqual(false)
     })
 
+    it('should return true when the event id starts with a prefix', () => {
+      const filter = {ids: ['22', '00']}
+
+      const event = {id: '001'}
+
+      const result = matchFilter(filter, event)
+
+      expect(result).toEqual(true)
+    })
+
     it('should return false when the event kind is not in the filter', () => {
       const filter = {kinds: [1, 2, 3]}
 
@@ -132,6 +142,20 @@ describe('Filter', () => {
       expect(result).toEqual(true)
     })
 
+    it('should return true when at least one prefix matches the event', () => {
+      const filters = [
+        {ids: ['1'], kinds: [1], authors: ['a']},
+        {ids: ['4'], kinds: [2], authors: ['d']},
+        {ids: ['9'], kinds: [3], authors: ['g']}
+      ]
+
+      const event = {id: '987', 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},

filter.ts

@@ -13,12 +13,19 @@ export type Filter = {
 
 export function matchFilter(
   filter: Filter,
-  event: Event & {id: string}
+  event: Event
 ): boolean {
-  if (filter.ids && filter.ids.indexOf(event.id) === -1) return false
+  if (filter.ids && filter.ids.indexOf(event.id) === -1) {
-  if (filter.kinds && filter.kinds.indexOf(event.kind) === -1) return false
+    if (!filter.ids.some(prefix => event.id.startsWith(prefix))) {
-  if (filter.authors && filter.authors.indexOf(event.pubkey) === -1)
       return false
+    }
+  }
+  if (filter.kinds && filter.kinds.indexOf(event.kind) === -1) return false
+  if (filter.authors && filter.authors.indexOf(event.pubkey) === -1) {
+    if (!filter.authors.some(prefix => event.pubkey.startsWith(prefix))) {
+      return false
+    }
+  }
 
   for (let f in filter) {
     if (f[0] === '#') {
@@ -42,7 +49,7 @@ export function matchFilter(
 
 export function matchFilters(
   filters: Filter[],
-  event: Event & {id: string}
+  event: Event
 ): boolean {
   for (let i = 0; i < filters.length; i++) {
     if (matchFilter(filters[i], event)) return true

index.ts

@@ -9,6 +9,7 @@ export * as nip04 from './nip04'
 export * as nip05 from './nip05'
 export * as nip06 from './nip06'
 export * as nip10 from './nip10'
+export * as nip13 from './nip13'
 export * as nip19 from './nip19'
 export * as nip26 from './nip26'
 export * as nip39 from './nip39'

nip05.test.js

@@ -17,4 +17,9 @@ test('fetch nip05 profiles', async () => {
     '32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245'
   )
   expect(p2.relays).toEqual(['wss://relay.damus.io'])
+
+  let p3 = await nip05.queryProfile('channel.ninja@channel.ninja')
+  expect(p3.pubkey).toEqual(
+    '36e65b503eba8a6b698e724a59137603101166a1cddb45ddc704247fc8aa0fce'
+  )
 })

nip05.ts

@@ -36,7 +36,7 @@ export async function queryProfile(
     name = '_'
   }
 
-  if (!name.match(/^[A-Za-z0-9-_]+$/)) return null
+  if (!name.match(/^[A-Za-z0-9-_.]+$/)) return null
   if (!domain.includes('.')) return null
 
   let res

nip13.test.js

@@ -0,0 +1,8 @@
+/* eslint-env jest */
+const {nip13} = require('./lib/nostr.cjs')
+
+test('identifies proof-of-work difficulty', async () => {
+  const id = '000006d8c378af1779d2feebc7603a125d99eca0ccf1085959b307f64e5dd358'
+  const difficulty = nip13.getPow(id)
+  expect(difficulty).toEqual(21)
+})

nip13.ts

@@ -0,0 +1,42 @@
+import * as secp256k1 from '@noble/secp256k1'
+
+/** Get POW difficulty from a Nostr hex ID. */
+export function getPow(id: string): number {
+  return getLeadingZeroBits(secp256k1.utils.hexToBytes(id))
+}
+
+/**
+ * Get number of leading 0 bits. Adapted from nostream.
+ * https://github.com/Cameri/nostream/blob/fb6948fd83ca87ce552f39f9b5eb780ea07e272e/src/utils/proof-of-work.ts
+ */
+function getLeadingZeroBits(hash: Uint8Array): number {
+  let total: number, i: number, bits: number
+
+  for (i = 0, total = 0; i < hash.length; i++) {
+    bits = msb(hash[i])
+    total += bits
+    if (bits !== 8) {
+      break
+    }
+  }
+  return total
+}
+
+/**
+ * Adapted from nostream.
+ * https://github.com/Cameri/nostream/blob/fb6948fd83ca87ce552f39f9b5eb780ea07e272e/src/utils/proof-of-work.ts
+ */
+function msb(b: number) {
+  let n = 0
+
+  if (b === 0) {
+    return 8
+  }
+
+  // eslint-disable-next-line no-cond-assign
+  while (b >>= 1) {
+    n++
+  }
+
+  return 7 - n
+}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nostr-tools",
-  "version": "1.8.2",
+  "version": "1.8.4",
   "description": "Tools for making a Nostr client.",
   "repository": {
     "type": "git",
@@ -18,12 +18,11 @@
   },
   "license": "Public domain",
   "dependencies": {
-    "@noble/hashes": "1.0.0",
+    "@noble/hashes": "1.2.0",
-    "@noble/secp256k1": "^1.7.1",
+    "@noble/secp256k1": "1.7.0",
-    "@scure/base": "^1.1.1",
+    "@scure/base": "1.1.1",
-    "@scure/bip32": "^1.1.5",
+    "@scure/bip32": "1.1.4",
-    "@scure/bip39": "^1.1.1",
+    "@scure/bip39": "1.1.1"
-    "prettier": "^2.8.4"
   },
   "keywords": [
     "decentralization",
@@ -32,6 +31,11 @@
     "client",
     "nostr"
   ],
+  "scripts": {
+    "build": "node build",
+    "format": "prettier --plugin-search-dir . --write .",
+    "test": "node build && jest"
+  },
   "devDependencies": {
     "@types/node": "^18.13.0",
     "@typescript-eslint/eslint-plugin": "^5.51.0",
@@ -44,6 +48,7 @@
     "events": "^3.3.0",
     "jest": "^29.4.2",
     "node-fetch": "^2.6.9",
+    "prettier": "^2.8.4",
     "ts-jest": "^29.0.5",
     "tsd": "^0.22.0",
     "typescript": "^4.9.5",

references.ts

@@ -81,7 +81,7 @@ export function parseReferences(evt: Event): Reference[] {
         }
         case 'a': {
           try {
-            let [kind, pubkey, identifier] = ref[1].split(':')
+            let [kind, pubkey, identifier] = tag[1].split(':')
             references.push({
               text: ref[0],
               address: {