Telegram Factor Authentication – Node SDK

If you are using TFA as your authentication service in your node applications, you can use our package.

How to use the package

So, let’s have a quick review of our steps.

  • Installation
  • Configuration
  • Checking result


The easiest step is installation. You can install it with npm. Just go ahead and enter the command below:

$ npm i tfa-node-sdk

Congratulations! First step is done!


After installation, go to your file and import the package:

const tfa = require('tfa-node-sdk');

Second, you need to epecify the accecc_token. You can get it in your dashboard panel. So, call the class:

const auth = new tfa('access_token');

Ok, now package know your access token. Now it’s time to enter the user_token. User token is the code you get it from your form field or a post method. Importent is to get user token. So, we use authUser function to pass user token and get the result.

const result = auth.authUser('user_token');

You are done it this step. Let’s move forward and check status codes and check user result.

Checking result

When you get the result, you have to use then and go for other stuff. Let’s use then like this:

result.then((result) => {
    const statCode = result.error;

    if (statCode === 800) {
    } else if (statCode === 820) {
        console.log('User token is wrong.');
    } else if (statCode === 290) {
        console.log('Admin token is wrong.');

This was just knowing status codes. If you don’t know them now, check out our docs and read them, and know what are result of every status code.

Ok, 800 and 290 just return you an 2 lenght object. One is error and second is message. But 800 doesn’t return you a message. You check the stat, if it was 800, second item is user. User item is the user data that telegram uid is stored there and you can use it.

More about status codes

Here let’s know about them in deep.

  • 800

    "error": 800,
    "user": {
        "_id": "document id",
        "uid": "telegram user id",
        "token": "one time token. Every time become null",
        "createdAt": "when created",
        "updatedAt": "last update",
        "__v": 0
  • 820

    "error": 820,
    "message": "User authentication token is not valid"
  • 290

    "error": 290,
    "message": "Admin access token is not valid"


If you want to develop the package, it is so simple. just follow steps below.

  • Link package
  • Test

Before you start: **Remember the base or codes are stored in lib/tfa.js. You need to edit there.

Link package

We asoume you are in tfa-node-sdk directory. Right. You can open a tmux or in another terminal to cd in test directory.

In tfa-node-sdk directory enter link command:

$ npm link

So, in other terminal, or other tmux part, link your development package to your test directory. If you are in the test directory ok, if not, just say cd test and enter the linking command:

$ npm link tfa-node-sdk

Linking step is done.


Your test app is linked. Change anything in package and test it in test directory.


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