Blasting scheduled maintenance alerts across your entire user base shouldn't require third-party email tools or wrestling with Telegram API 429 rate limit spikes. With FlexGram, you can record subscriber chat targets directly to Firebase and let the built-in throttled broadcast engine safely push the warning out to everyone in sequence. Here is how I set up instant downtime dispatches for all platform subscribers.
📁 Filename:
command/subscribe.js👨💻 Code:
const alertTarget = user.username ? `@${user.username}` : user.first_name;
await setDB(`subscribers/${user.id}`, { id: user.id, user: alertTarget });
sendMessage(`🔔 *Status Alerts Active*\nYou will receive real-time notifications before scheduled server maintenance.`);📁 Filename:
command/broadcast_maintenance.js👨💻 Code:
sendChatAction("typing");
const subs = await getDB("subscribers");
const userIds = subs ? Object.keys(subs) : [];
const notice = `⚠️ *System Maintenance Notice*\n\nDatabase migration starts in 15 minutes. Bot APIs will be briefly paused.`;
const buttons = [{ text: "Live Status Page", url: "https://status.example.com" }];
const report = await broadcast(userIds, notice, buttons, 40);
sendMessage(`📡 *Dispatch Complete*\nDelivered: *${report.sent}*\nFailed: *${report.failed}*`);💡 Setting your broadcast delay around 35ms to 50ms keeps your dispatch comfortably within Telegram rate limits while finishing large recipient queues quickly.
⚠️ Note: Lock broadcast_maintenance.js behind an admin ID check or private bot property so unauthorized users cannot trigger mass broadcasts.#FlexGram
