telegram bot with payment

from aiogram import Bot
from aiogram import types
from aiogram.dispatcher import Dispatcher
from aiogram.types.message import ContentTypes
from aiogram.utils import executor
import config


BOT_TOKEN = config.TOKEN
PAYMENTS_PROVIDER_TOKEN = config.PAYMENTS_TOKEN

bot = Bot(BOT_TOKEN)
dp = Dispatcher(bot)

# Setup prices
prices = [
    types.LabeledPrice(label='Working Time Machine', amount=5750),
    types.LabeledPrice(label='Gift wrapping', amount=500),
]

# Setup shipping options
shipping_options = [
    types.ShippingOption(id='instant', title='WorldWide Teleporter').add(types.LabeledPrice('Teleporter', 1000)),
    types.ShippingOption(id='pickup', title='Local pickup').add(types.LabeledPrice('Pickup', 300)),
]


@dp.message_handler(commands=['start'])
async def cmd_start(message: types.Message):
    await bot.send_message(message.chat.id,
                           "Hello, I'm the demo merchant bot."
                           " I can sell you a Time Machine."
                           " Use /buy to order one, /terms for Terms and Conditions")

@dp.message_handler(commands=['buy'])
async def cmd_buy(message: types.Message):
    await bot.send_message(message.chat.id,
                           "Real cards won't work with me, no money will be debited from your account."
                           " Use this test card number to pay for your Time Machine: `4242 4242 4242 4242`"
                           "\n\nThis is your demo invoice:", parse_mode='Markdown')
    await bot.send_invoice(message.chat.id, title='Working Time Machine',
                           description='Want to visit your great-great-great-grandparents?'
                                       ' Make a fortune at the races?'
                                       ' Shake hands with Hammurabi and take a stroll in the Hanging Gardens?'
                                       ' Order our Working Time Machine today!',
                           provider_token=PAYMENTS_PROVIDER_TOKEN,
                           currency='usd',
                           photo_url='https://telegra.ph/file/d08ff863531f10bf2ea4b.jpg',
                           photo_height=512,  # !=0/None or picture won't be shown
                           photo_width=512,
                           photo_size=512,
                           is_flexible=True,  # True If you need to set up Shipping Fee
                           prices=prices,
                           start_parameter='time-machine-example',
                           payload='HAPPY FRIDAYS COUPON')


@dp.shipping_query_handler(lambda query: True)
async def shipping(shipping_query: types.ShippingQuery):
    await bot.answer_shipping_query(shipping_query.id, ok=True, shipping_options=shipping_options,
                                    error_message='Oh, seems like our Dog couriers are having a lunch right now.'
                                                  ' Try again later!')


@dp.pre_checkout_query_handler(lambda query: True)
async def checkout(pre_checkout_query: types.PreCheckoutQuery):
    await bot.answer_pre_checkout_query(pre_checkout_query.id, ok=True,
                                        error_message="Aliens tried to steal your card's CVV,"
                                                      " but we successfully protected your credentials,"
                                                      " try to pay again in a few minutes, we need a small rest.")


@dp.message_handler(content_types=ContentTypes.SUCCESSFUL_PAYMENT)
async def got_payment(message: types.Message):
    await bot.send_message(message.chat.id,
                           'Hoooooray! Thanks for payment! We will proceed your order for `{} {}`'
                           ' as fast as possible! Stay in touch.'
                           '\n\nUse /buy again to get a Time Machine for your friend!'.format(
                               message.successful_payment.total_amount / 100, message.successful_payment.currency),
                           parse_mode='Markdown')


if __name__ == '__main__':
    executor.start_polling(dp, skip_updates=True)