fix typo, correctly perform auth, and close remote when local disconnects

src/main.ts

@@ -20,7 +20,7 @@ async function validateAuthEvent(event: Event, challenge: string): boolean {
   if (event.kind !== 22242) return false;
   const last30Seconds = Math.floor(Date.now() / 1000) - 30;
   if (event.created_at < last30Seconds) return false;
-  const challengeTag = event.tags.find(tag => tag[0] === 'challange')?.[1];
+  const challengeTag = event.tags.find(tag => tag[0] === 'challenge')?.[1];
   if (challengeTag !== challenge) return false;
   const file = Bun.file("./allowed-pubkeys.json");
   if (!await file.exists()) return true;
@@ -60,20 +60,31 @@ export function main(mainRelayUrl: string) {
             const [event] = data;
             const valid = await validateAuthEvent(event, ws.data.authToken);
             if (!valid) return sendMessage(ws, ['NOTICE', "Invalid auth event"]);
+            sendMessage(ws, ['OK', event.id, true, "successully authenticated. welcome"]);
             ws.data.authenticated = true;
             return;
           }
           return sendAuth(ws);
+        } else if (ws.data.authenticated && command === "AUTH") {
+          const [event] = data;
+          return sendMessage(ws, ['OK', event.id, true, 'you were already authenticated'])
         }
         ws.data.remoteWs.send(msg);
       },
       open(ws) {
-        sendAuth(ws);
-        ws.data.remoteWs = new WebSocket(mainRelayUrl);
-        ws.data.remoteWs.onmessage = (data) => ws.send(data.data, true);
+        const remoteWs = new WebSocket(mainRelayUrl);
+        remoteWs.addEventListener("message", data => ws.send(data.data, true));
+        remoteWs.addEventListener("open", () => {
+          ws.data.remoteWs = remoteWs;
+          sendAuth(ws);
+        })
+        remoteWs.addEventListener("error", console.error)
       },
       perMessageDeflate: true,
       perMessageDeflateCompressionLevel: 9
+      close(ws) {
+        ws.data.remoteWs?.close();
+      }
     }
   })
   console.log('Server listening @', server.url.host)