@mtproto/core

@mtproto/core

Telegram API (MTProto) client library for browser

• Actual. 112 layer in the API scheme
• Fast. Uses WebSocket to work with the network
• Easy. Cryptography is hidden. Just make requests to the API
• Events. Subscribe to updates via the EventEmitter API
• 2FA. Use the library's built-in function to calculate 2FA parameters

Install

yarn add @mtproto/core -E
# or
npm i @mtproto/core -E

Quick start

You need api_id and api_hash. If you do not have them yet, then get them according to the official instructions: creating your Telegram application.

const { MTProto } = require('@mtproto/core');

const api_id = 'YOU_API_ID';
const api_hash = 'YOU_API_HASH';

// 1. Create an instance
const mtproto = new MTProto({
  api_id,
  api_hash,

  // Use test servers
  test: true,
});

// 2. Get the user country code
mtproto.call('help.getNearestDc').then(result => {
  console.log(`country:`, result.country);
});

Login

// https://core.telegram.org/api/auth#test-phone-numbers
const phone = '[phone]';
const code = '22222';

mtproto
  .call('auth.sendCode', {
    phone_number: phone,
    settings: {
      _: 'codeSettings',
    },
  })
  .then(result => {
    mtproto
      .call('auth.signIn', {
        phone_code: code,
        phone_number: phone,
        phone_code_hash: result.phone_code_hash,
      })
      .then(result => {
        console.log(`auth.signIn[result]:`, result);
      })
      .catch(error => {
        if (error.error_message === 'SESSION_PASSWORD_NEEDED') {
          // Need use 2FA
        }
      });
  });

API

mtproto.call(method, options) => Promise

Select method and options from methods list. Promise.then contain result. Promise.catch contain error with the error_code and error_message properties.

Example:

mtproto.call('help.getNearestDc').then(result => {
  console.log(`result:`, result);
}).catch(error => {
  console.log(`error:`, error);
});

mtproto.updates.on(UpdatesName, handler)

Authorized users are being Updates. They can be handled using mtproto.updates.on. Example of handling a updateShort with updateUserStatus:

mtproto.updates.on('updateShort', message => {
  const { update } = message;

  if (update._ === 'updateUserStatus') {
    const { user_id, status } = update;

    console.log(`User with id ${user_id} change status to ${status}`);
  }
});

mtproto.changeDc(dcId)

If a migration error occurs, you can use this function to change the data center.

Example:

mtproto
  .call('auth.sendCode', {
    phone_number: '[phone]',
    settings: {
      _: 'codeSettings',
    },
  })
  .then(result => {
    // Handle result
  })
  .catch(error => {
    if (error.error_message.includes('_MIGRATE_')) {
      const [item, dcId] = error.error_message.split('_MIGRATE_');

      mtproto.changeDc(dcId);

      // Repeat call this
    }
  });

getSRPParams({ g, p, salt1, salt2, gB, password }) => { A, M1 }

For more information about parameters, see the article on the Telegram website.

Example 2FA (Two-factor authentication):

const { getSRPParams } = require('@mtproto/core');

const password = 'YOU_PASSWORD';

mtproto
  .call('account.getPassword')
  .then(async result => {
    const { srp_id, current_algo, srp_B } = result;
    const { salt1, salt2, g, p } = current_algo;

    const { A, M1 } = await getSRPParams({
      g,
      p,
      salt1,
      salt2,
      gB: srp_B,
      password,
    });

    return mtproto.call('auth.checkPassword', {
      password: {
        _: 'inputCheckPasswordSRP',
        srp_id,
        A,
        M1,
      },
    });
  })
  .then(result => {
    console.log(`auth.checkPassword[result]:`, result);
  });

Useful references

• API methods — https://core.telegram.org/methods
• API schema — https://core.telegram.org/schema