web_app.py

from aiogram import Bot, types
from aiohttp import web
from aiohttp.web_fileresponse import FileResponse
from aiohttp.web_response import Response

from config import settings
from utils import parse_init_data

routes = web.RouteTableDef()


@routes.get('/')
async def index(request) -> Response:
    return FileResponse('static/index.html')


@routes.post('/submitOrder')
async def submit_order(request) -> Response:
    data = await request.json()
    init_data = parse_init_data(token=settings.BOT_TOKEN,
                                raw_init_data=data['initData'])
    if not init_data:
        return
    bot: Bot = request.app['bot']
    query_id = init_data['query_id']

    result_text = '<b>Order summary</b>'
    for item in data['items']:
        name, price, amount = item.values()
        result_text += f'{name} x{amount} - <b>{price}</b>'

    result_text += '\n' + data['totalPrice']

    result = types.InlineQueryResultArticle(
        id=query_id,
        title='Order',
        input_message_content=types.InputTextMessageContent(
            message_text=result_text),
    )

    await bot.answer_web_app_query(query_id, result)