uptime-kuma/server/notification-providers/telegram.js

const NotificationProvider = require("./notification-provider");
const axios = require("axios");

class Telegram extends NotificationProvider {

    name = "telegram";

    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
        let okMsg = "Sent Successfully.";

        try {
            const paramsObj =
            {
                chat_id: notification.telegramChatID,
                text: msg,
                disable_notification: notification.telegramSilentNotification ?? false,
                protect_content: notification.telegramProtectContent ?? false,

            };
            // if telegramChatThread specified, then add it to paramsObj
            if (notification.telegramChatThread && notification.telegramChatThread.length > 0) {
                paramsObj.message_thread_id = notification.telegramChatThread;
            }
            await axios.get(`https://api.telegram.org/bot${notification.telegramBotToken}/sendMessage`, {
                params: paramsObj
            });
            return okMsg;

        } catch (error) {
            let msg = (error.response.data.description) ? error.response.data.description : "Error without description";
            throw new Error(msg);
        }
    }
}

module.exports = Telegram;