feat: basic browsing (#1)

src/renderer/src/lib/nip05.ts

@@ -0,0 +1,41 @@
+import { LRUCache } from 'lru-cache'
+
+type TVerifyNip05Result = {
+  isVerified: boolean
+  nip05Name: string
+  nip05Domain: string
+}
+
+const verifyNip05ResultCache = new LRUCache<string, TVerifyNip05Result>({
+  max: 1000,
+  fetchMethod: (key) => {
+    const { nip05, pubkey } = JSON.parse(key)
+    return _verifyNip05(nip05, pubkey)
+  }
+})
+
+async function _verifyNip05(nip05: string, pubkey: string): Promise<TVerifyNip05Result> {
+  const [nip05Name, nip05Domain] = nip05?.split('@') || [undefined, undefined]
+  const result = { isVerified: false, nip05Name, nip05Domain }
+  if (!nip05Name || !nip05Domain || !pubkey) return result
+
+  try {
+    const res = await fetch(`https://${nip05Domain}/.well-known/nostr.json?name=${nip05Name}`)
+    const json = await res.json()
+    if (json.names?.[nip05Name] === pubkey) {
+      return { ...result, isVerified: true }
+    }
+  } catch {
+    // ignore
+  }
+  return result
+}
+
+export async function verifyNip05(nip05: string, pubkey: string): Promise<TVerifyNip05Result> {
+  const result = await verifyNip05ResultCache.fetch(JSON.stringify({ nip05, pubkey }))
+  if (result) {
+    return result
+  }
+  const [nip05Name, nip05Domain] = nip05?.split('@') || [undefined, undefined]
+  return { isVerified: false, nip05Name, nip05Domain }
+}