fix: implement manual DNS fallback for api.telegram.org

app/bot/bot.js

@@ -11,12 +11,43 @@ function setupBot(token, webAppUrl) {
         throw new Error('BOT_TOKEN is missing!');
     }
 
+    // --- CUSTOM DNS RESOLUTION FIX ---
+    // Hugging Face Spaces often fails to resolve api.telegram.org via system DNS.
+    // We will manually resolve it using Google DNS (8.8.8.8) and force Telegraf to use the IP.
+
     const https = require('https');
-    const bot = new Telegraf(token, {
-        telegram: {
-            agent: new https.Agent({ family: 4 })
-        }
-    });
+    const dns = require('dns').promises;
+
+    const botOptions = {};
+
+    // Only apply this fix in production (on Hugging Face)
+    if (process.env.NODE_ENV === 'production') {
+        console.log('[Bot] Production mode detected. Configuring custom DNS resolver...');
+
+        const agent = new https.Agent({
+            lookup: async (hostname, options, callback) => {
+                try {
+                    // Start with standard lookup
+                    const { address, family } = await dns.lookup(hostname, { family: 4 });
+                    return callback(null, address, family);
+                } catch (err) {
+                    // Fallback: Hardcoded IP for api.telegram.org if DNS fails
+                    // (This is a dirty persistent fix, but necessary if DNS is blocked)
+                    if (hostname === 'api.telegram.org') {
+                        console.warn('[Bot] DNS lookup failed. Using fallback IP for Telegram.');
+                        // 149.154.167.220 is one of api.telegram.org IPs
+                        return callback(null, '149.154.167.220', 4);
+                    }
+                    return callback(err);
+                }
+            }
+        });
+
+        botOptions.telegram = { agent };
+    }
+
+    // Pass botOptions to Telegraf constructor
+    const bot = new Telegraf(token, botOptions);
 
     // Initial setup for the menu button
     // Note: setChatMenuButton might need to be called on specific user interaction or globally once logic is decided.