Betaling med Vipps i Python 3

betaling-vipps.py

"""
En enkel demo for å initialisere en Vipps-transaksjon.
Returnerer en URL som kunden kan bruke til å fullføre transaksjonen.
Denne URL kan for eksempel enkodes som en QR-kode og skannes.

Koden er lisensiert som CC-BY
2020 stigok
https://creativecommons.org/licenses/by/4.0/legalcode.no
"""
import datetime
import json
import secrets
import sys

import requests

#api_url = "https://api.vipps.no"
api_url = "https://apitest.vipps.no"

merchant_id = "12345"
client_id = "xxx"
client_secret = "xxx"
vipps_subscription_key_1 = "xxx"
vipps_subscription_key_2 = "xxx"

# Vipps will only allow callbacks to ports 80, 443 and 8080
callback_url = "https://matrix.hackeriet.no/vipps-test/vipps/callback"
fallback_url_format = "https://matrix.hackeriet.no/vipps-test/vipps/fallback/%s"


def generate_order_id():
    """
    Generates a unique order ID. This implementation is time-based.
    You should most probably be using sequenced ID's instead, like the number
    from an auto-incremented SQL column.
    """
    n = int(datetime.datetime.now().timestamp())
    s = "{:012}".format(n)
    return "-".join([merchant_id, s[:4], s[4:8], s[8:]])


def get_access_token():
    """Return an access token string for authentication with the Vipps API"""
    url = api_url + "/accessToken/get"
    headers = {
        "client_id": client_id,
        "client_secret": client_secret,
        "Ocp-Apim-Subscription-Key": vipps_subscription_key_1,
    }

    logging.debug("Request details %s",
        json.dumps(dict(url=url, headers=headers), indent=2))

    res = requests.post(url, headers=headers)
    res.raise_for_status()
    return res.json()["access_token"]


def api_req(endpoint, payload, *, access_token):
    """Make an HTTP POST request to the API endpoint with the given payload"""
    url = api_url + endpoint
    headers = {
        "Authorization": "Bearer %s" % access_token,
        "Ocp-Apim-Subscription-Key": vipps_subscription_key_1,
        "X-Request-Id": secrets.token_urlsafe(8),
    }

    logging.debug("Request details %s",
        json.dumps(dict(url=url, headers=headers, payload=payload), indent=2))

    res = requests.post(url, json=payload, headers=headers)
    res.raise_for_status()
    return res.json()


def initiate_payment(*, amount, description, access_token):
    order_id = generate_order_id()
    payload = {
        "customerInfo": {},
        "merchantInfo": {
            "merchantSerialNumber": str(merchant_id),
            "callbackPrefix": callback_url,
            "fallBack": fallback_url_format % order_id,
        },
        "transaction": {
            "orderId": order_id,
            "amount": amount,
            "transactionText": description,
        },
    }
    return api_req("/ecomm/v2/payments", payload, access_token=access_token)


if __name__ == "__main__":
    import logging

    logging.basicConfig(level=logging.DEBUG)
    logging.debug("API URL %s", api_url)

    token = get_access_token()
    order = initiate_payment(amount=3500, description="Club Mate",
                             access_token=token)

    print("Vennligst betal kr 35.00 for din Club Mate")
    print()
    print("Ordre #", order["orderId"])
    print(order["url"])

requirements.txt

requests==2.23.0