gramjs/examples/main.ts

import {Logger} from "telegram/extensions";
import {TelegramClient} from "telegram";
import {StringSession} from "telegram/sessions";
import {NewMessage} from "telegram/events";
import {NewMessageEvent} from "telegram/events/NewMessage";

const apiId = ;
const apiHash = '';
const stringSession = '';

async function eventPrint(event: NewMessageEvent) {
    const message = event.message;

    // Checks if it's a private message (from user or bot)
    if (event.isPrivate){
        // prints sender id
        console.log(message.senderId);
        // read message
        if (message.text=="hello"){
            const sender = await message.getSender();
            console.log("sender is",sender);
            await client.sendMessage(sender,{
                message:`hi your id is ${message.senderId}`
            });
        }
    }
}
const client = new TelegramClient(new StringSession(stringSession), apiId, apiHash, {connectionRetries: 5});

(async () => {
    Logger.setLevel("debug");
    console.log('Loading interactive example...');
    await client.start({
        botAuthToken: ""
    });

    console.log(await client.getEntity("me"));
    console.log(client.session.save())
})();

// adds an event handler for new messages
client.addEventHandler(eventPrint, new NewMessage({}));