const activitystreams = require('telegram-bot-activitystreams');
const TelegramBot = require('node-telegram-bot-api');

const token = 'YOUR_TELEGRAM_BOT_TOKEN';
const bot = new TelegramBot(token, {polling: true});

bot.on('message', (msg) => {
  const activity = activitystreams(msg);
  bot.sendMessage(msg.chat.id, 'Hello ' + activity.actor.name);
});