index.ts

import { apiThrottler } from '@grammyjs/transformer-throttler'
import { Bot, session } from 'grammy'
import { composer } from './composers'
import { router as addRouter } from './routers/add'
import { router as multiplyRouter } from './routers/multiply'

import type { CustomContext } from './types/CustomContext'
import type { SessionData } from './types/SessionData'

// 1. Create a bot with a token (get it from https://t.me/BotFather)
const bot = new Bot<CustomContext>('') // <-- place your token inside this string

// 2. Attach an api throttler transformer to the bot
bot.api.config.use(apiThrottler())

// 3. Attach a session middleware and specify the initial data
bot.use(
    session({
        initial: (): SessionData => ({
            route: '',
            leftOperand: 0,
            rightOperand: 0,
        }),
    })
)

// 4. Attach all routers to the bot as middleware
bot.use(addRouter)
bot.use(multiplyRouter)

// 5. Attach all composers to the bot as middleware
bot.use(composer)

// 6. Start the bot
bot.start()