Mon

const Telegraf  = require('telegraf'),
      Stage     = require('telegraf/stage'),
      WizardScene = require('telegraf/scenes/wizard')

const mongoose = require("mongoose")
mongoose.connect(`mongodb://127.0.0.1:27017/test`, {
    useNewUrlParser: true,
    useFindAndModify: false
})

const Schema = mongoose.Schema
const sessionScheme = new Schema({
    key: String,
    session: Object
})
Session = mongoose.model("Session", sessionScheme, 'sessions')

session = function () {
    return async (ctx, next) => {
        const key = ctx.from && ctx.chat && `${ctx.from.id}:${ctx.chat.id}`
        if (!key) {
            return next(ctx)
        }
        let session = await Session.findOne({ key: key })
        session = session ? session.session : {}
        Object.defineProperty(ctx, 'session', {
            get: function () { return session },
            set: function (newValue) { session = Object.assign({}, newValue) }
        })
        return next(ctx).then(async () => {
            await Session.updateOne({key: key}, { $set: { session: session } }, { upsert: true })
        })
    }
}

const select = new WizardScene('select',
    async (ctx) => {
        console.log('select', ctx.session)
        await ctx.reply('Переход в сцену select. Введите что-то')
        return ctx.wizard.next()
    },
    (ctx) => {
        ctx.reply('Next')
    }
)

const stage = new Stage([select])

const bot = new Telegraf('812106160:AAF1bHTrQQde4hL_rBToXoRiZwYeK7VkyUo') //@hyperloop_bot

bot.use(session())
bot.use(stage.middleware())

bot.start(async (ctx) => {
    console.log('start', ctx.session)
    ctx.scene.enter('select')
})
bot.launch()