index.js

require('dotenv').config();

const { Telegraf } = require('telegraf');
const { message } = require('telegraf/filters');

const bot = new Telegraf(process.env.BOT_TOKEN);

bot.command('quit', async (ctx) => {
	// Explicit usage
	await ctx.telegram.leaveChat(ctx.message.chat.id);

	// Using context shortcut
	await ctx.leaveChat();
});

bot.on(message('text'), async (ctx) => {
	// Explicit usage
	await ctx.telegram.sendMessage(
		ctx.message.chat.id,
		`Hello ${ctx.state.role}`
	);

	// Using context shortcut
	await ctx.reply(`Hello ${ctx.state.role}`);
});

bot.on('callback_query', async (ctx) => {
	// Explicit usage
	await ctx.telegram.answerCbQuery(ctx.callbackQuery.id);

	// Using context shortcut
	await ctx.answerCbQuery();
});

bot.on('inline_query', async (ctx) => {
	const result = [];
	// Explicit usage
	await ctx.telegram.answerInlineQuery(ctx.inlineQuery.id, result);

	// Using context shortcut
	await ctx.answerInlineQuery(result);
});

bot.launch();

// Enable graceful stop
process.once('SIGINT', () => bot.stop('SIGINT'));
process.once('SIGTERM', () => bot.stop('SIGTERM'));