django-datatrans-gateway

A django integration for the datatrans payment gateway.

Supports:

• Direct payment by the user.
• Registration of a credit card alias by the user, followed by one or more charges (without the user being present).
• Refund (total or partial) of a previous successful charge.

This implementation:

• Handles the exchanges with datatrans, including the signing of requests and the verification of the signature of notifications. All exchanges are logged as structured events, to make auditing easy.
• Introduces persistent models for AliasRegistration, Payment, and Refund. Both successes and failures are stored.
• Offers a rich admin interface, allowing ad-hoc payments using registered credit cards, as well as refunds.
• Sends signals whenever an AliasRegistration, Payment, or Refund is done. The signal is sent even if the operation failed, the receiver should check the success flag received with the signal.

Requirements

• Python: 3.6 and over
• Django: 2.0 and over

Usage

Add datatrans to your INSTALLED_APPS:

INSTALLED_APPS = (
    ...
    'datatrans.apps.DatatransConfig',
)

Include datatrans-urls to the urlpatterns in your urls.py, for instance:

urlpatterns = [
    url(r'^datatrans/', include('datatrans.urls')),
]

Configure the callback url in the datatrans UPP Administration page.

In your settings.py, enter the configuration for your web and mpo merchants. For instance:

DATATRANS = {
    'WEB_MERCHANT_ID': '1111111111',
    'WEB_HMAC_KEY': 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA',
    'MPO_MERCHANT_ID': '2222222222',
    'MPO_HMAC_KEY': 'BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB',
}

Troubleshooting

If you don't see a payment (or a payment error) in the database, and you are sure you've properly configured the callback in the upp, then start by looking in the log for a datatrans-notification.

Development

To install all dependencies:

pip install -e .

To run tests:

pip install pytest-django
pytest

To lint, typecheck, test, and verify you didn't forget to create a migration:

pip install tox
tox

To install the version being developed into another django project:

pip install -e <path-to-this-directory>