server.js

import { ChatGPTAPI, ChatGPTConversation } from 'chatgpt';
import TelegramBot from 'node-telegram-bot-api';

(async () => {
  const api = new ChatGPTAPI({ sessionToken: process.env.SESSION_TOKEN });
  let conversation = new ChatGPTConversation(api);
  await api.ensureAuth();
  const bot = new TelegramBot(process.env.BOT_TOKEN, { polling: true });
  const { first_name: botName } = await bot.getMe();
  bot.onText(/\/chatgpt (.+)/, async (msg, match) => {
    const { id: chatId } = msg.chat;
    console.log(new Date(), `${msg.from.username}: ${match[1]}`);
    if (match[1] === 'new') {
      conversation = new ChatGPTConversation(api);
      await bot.sendMessage(chatId, 'Starting new conversation', { reply_to_message_id: msg.message_id });
    } else {
      await bot.sendChatAction(chatId, 'typing');
      const typingInterval = setInterval(async () => await bot.sendChatAction(chatId, 'typing'), 5000);
      let response;
      try {
        let count = 0;
        const maxTries = 5;
        while (true) {
          try {
            response = await conversation.sendMessage(match[1]);
            break;
          } catch (error) {
            console.log(new Date(), error.toString());
            if (++count === maxTries) throw error;
          }
        }
      } catch (error) {
        response = error.toString();
      }
      clearInterval(typingInterval);
      await bot.sendMessage(chatId, response, { reply_to_message_id: msg.message_id });
    }
  });
  console.log(new Date(), `${botName} is ready ✨`);
})();