Small login + send message script with gramJS

main.js

const readline = require("readline")
const { ResolveUsernameRequest } = require("telegram/gramjs/tl/functions/contacts")
const { SendMessageRequest } = require("telegram/gramjs/tl/functions/messages")
const { TelegramClient} = require('telegram/gramjs')

const apiId = 12345689
const apiHash = "123456789abcdfgh"

const { ConnectionTCPFull } = require('telegram/gramjs/network')
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
})

const client = new TelegramClient("session", apiId, apiHash, { connection: ConnectionTCPFull })

async function codeCallback() {
    return new Promise((resolve => {
        rl.question('Input the code you received : ', (answer) => {
            resolve(answer)
        })
    }))
}

async function passwordCallback() {
    return new Promise((resolve => {
        rl.question('please enter your password :', (answer) => {
            resolve(answer)
        })
    }))
}

async function phoneCallback() {
    return new Promise((resolve => {
        rl.question('Please enter your phone number : ', (answer) => {
            resolve(answer)
        })
    }))
}


(async function f() {
    await client.start({
        phone: phoneCallback,
        code: codeCallback,
        password: passwordCallback,
    })
    const peer = await client.invoke(new ResolveUsernameRequest({
        username: "username",
    }))
    console.log(peer)
    await client.invoke(new SendMessageRequest({
        peer: peer,
        message: 'hello'
    }))
    console.log("all done")

})()