feat: nip05 feeds

src/lib/nip05.ts

@@ -1,4 +1,5 @@
 import { LRUCache } from 'lru-cache'
+import { isValidPubkey } from './pubkey'
 
 type TVerifyNip05Result = {
   isVerified: boolean
@@ -20,7 +21,7 @@ async function _verifyNip05(nip05: string, pubkey: string): Promise<TVerifyNip05
   if (!nip05Name || !nip05Domain || !pubkey) return result
 
   try {
-    const res = await fetch(`https://${nip05Domain}/.well-known/nostr.json?name=${nip05Name}`)
+    const res = await fetch(getWellKnownNip05Url(nip05Domain, nip05Name))
     const json = await res.json()
     if (json.names?.[nip05Name] === pubkey) {
       return { ...result, isVerified: true }
@@ -39,3 +40,32 @@ export async function verifyNip05(nip05: string, pubkey: string): Promise<TVerif
   const [nip05Name, nip05Domain] = nip05?.split('@') || [undefined, undefined]
   return { isVerified: false, nip05Name, nip05Domain }
 }
+
+export function getWellKnownNip05Url(domain: string, name?: string): string {
+  const url = new URL('/.well-known/nostr.json', `https://${domain}`)
+  if (name) {
+    url.searchParams.set('name', name)
+  }
+  return url.toString()
+}
+
+export async function fetchPubkeysFromDomain(domain: string): Promise<string[]> {
+  try {
+    const res = await fetch(getWellKnownNip05Url(domain))
+    const json = await res.json()
+    const pubkeySet = new Set<string>()
+    return Object.values(json.names || {}).filter((pubkey) => {
+      if (typeof pubkey !== 'string' || !isValidPubkey(pubkey)) {
+        return false
+      }
+      if (pubkeySet.has(pubkey)) {
+        return false
+      }
+      pubkeySet.add(pubkey)
+      return true
+    }) as string[]
+  } catch (error) {
+    console.error('Error fetching pubkeys from domain:', error)
+    return []
+  }
+}