Node.js module to interact with official Telegram Bot API. A bot token is needed, to obtain one, talk to @botfather and create a new bot.

npm install node-telegram-bot-api

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

var token = 'YOUR_TELEGRAM_BOT_TOKEN';
// Setup polling way
var bot = new TelegramBot(token, {polling: true});
bot.on('message', function (msg) {
  var chatId = msg.chat.id;
  // photo can be: a file path, a stream or a Telegram file_id
  var photo = 'bot.gif';
  bot.sendPhoto(chatId, photo, {caption: "I'm a bot!"});
});

There are some other examples on examples.

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TelegramBot

Both request method to obtain messages are implemented. To use standard polling, set polling: true on options. Notice that webHook will need a valid (not self signed) SSL certificate. Emmits message when a message arrives.

See: https://core.telegram.org/bots/api

Params:

• String token Bot Token
• Object [options]
• Boolean|Object [options.polling=false] Set true to enable polling
• String|Number [options.polling.timeout=4] Polling time
• Boolean|Object [options.webHook=false] Set true to enable WebHook
• String [options.webHook.key] PEM private key to webHook server
• String [options.webHook.cert] PEM certificate key to webHook server

getMe()

Returns basic information about the bot in form of a User object.

Return:

• Promise

setWebHook(url)

Specify a url to receive incoming updates via an outgoing webHook.

Params:

• String url URL

getUpdates([timeout], [limit], [offset])

Use this method to receive incoming updates using long polling

See: https://core.telegram.org/bots/api#getupdates

Params:

• Number|String [timeout] Timeout in seconds for long polling.
• Number|String [limit] Limits the number of updates to be retrieved.
• Number|String [offset] Identifier of the first update to be returned.

Return:

• Promise Updates

sendMessage(chatId, text, [options])

Send text message.

See: https://core.telegram.org/bots/api#sendmessage

Params:

• Number|String chatId Unique identifier for the message recipient
• Sting text Text of the message to be sent
• Object [options] Additional Telegram query options

Return:

• Promise

forwardMessage(chatId, fromChatId, messageId)

Forward messages of any kind.

Params:

• Number|String chatId Unique identifier for the message recipient
• Number|String fromChatId Unique identifier for the chat where the original message was sent
• Number|String messageId Unique message identifier

Return:

• Promise

sendPhoto(chatId, photo, [options])

Send photo

See: https://core.telegram.org/bots/api#sendphoto

Params:

• Number|String chatId Unique identifier for the message recipient
• String|stream.Stream photo A file path or a Stream. Can also be a file_id previously uploaded
• Object [options] Additional Telegram query options

Return:

• Promise

sendAudio(chatId, audio, [options])

Send audio

See: https://core.telegram.org/bots/api#sendaudio

Params:

• Number|String chatId Unique identifier for the message recipient
• String|stream.Stream audio A file path or a Stream. Can also be a file_id previously uploaded.
• Object [options] Additional Telegram query options

Return:

• Promise