Datacash package for django-oscar
This package provides integration with the payment gateway, DataCash. It is designed to integrate seamlessly with the e-commerce framework django-oscar but can be used without using oscar.
pip install django-oscar-datacash
or from Github:
pip install git+git://github.com/tangentlabs/django-oscar-datacash.git#egg=django-oscar-datacash
INSTALLED_APPS and run:
./manage.py migrate datacash
to create the appropriate database tables.
settings.py to set the following settings:
DATACASH_HOST = 'testserver.datacash.com' DATACASH_CLIENT = '...' DATACASH_PASSWORD = '...' DATACASH_CURRENCY = 'GBP'
There are other settings available (see below). Obviously, you'll need to specify different settings in your test environment as opposed to your production environment.
Integration into checkout
You'll need to use a subclass of
oscar.apps.checkout.views.PaymentDetailsView within your own
checkout views. See oscar's documentation on how to create a local version of the checkout app.
handle_payment method (which is blank by default) and add your integration code. An example
integration might look like:
# myshop.checkout.views from django.conf import settings from oscar.apps.checkout.views import PaymentDetails as OscarPaymentDetails from oscar.apps.payment.utils import Bankcard from oscar.apps.checkout.forms import BankcardForm from datacash.facade import Facade ... class PaymentDetailsView(OscarPaymentDetails): def get_context_data(self): ... # Render a bankcard form ctx['bankcard_form'] = BankcardForm() ... return ctx def post(self, request, *args, **kwargs): # Check bankcard form is valid form = BankcardForm(request.POST) if not form.is_valid(): ctx = self.get_context_data(**kwargs) ctx['bankcard_form'] = form return self.render_to_response(ctx) kwargs['bankcard'] = form.get_bankcard_obj() super(PaymentDetailsView, self).post(request, *args, **kwargs) def handle_payment(self, order_number, total, **kwargs): # Make request to DataCash - if there any problems (eg bankcard # not valid / request refused by bank) then an exception would be # raised ahd handled) within oscar's PaymentDetails view. bankcard = kwargs['bankcard'] datacash_ref = Facade().pre_authorise(order_number, total, bankcard) # Request was successful - record the "payment source". As this # request was a 'pre-auth', we set the 'amount_allocated' - if we had # performed an 'auth' request, then we woudl set 'amount_debited'. source_type,_ = SourceType.objects.get_or_create(name='Datacash') source = Source(source_type=source_type, currency=settings.DATACASH_CURRENCY, amount_allocated=total, reference=datacash_ref) self.add_payment_source(source)
Oscar's view will handle the various exceptions that can get raised. See DataCash's documentation for further details on the various processing models that are available.
There are two key components:
datacash.gateway.Gateway provides fine-grained access to the
various DataCash APIs, which involve constructing XML requests and decoding XML
responses. All calls return a
datacash.gateway.Response instance which
provides dictionary-like access to the attributes of the response.
from decimal import Decimal as D from datacash.gateway import Gateway gateway = Gateway() # Single stage processing response = gateway.auth(amount=D('100.00'), currency='GBP', merchant_reference='AA_1234', card_number='4500203021916406', expiry_date='10/14', ccv='345') response = gateway.refund(amount=D('100.00'), currency='GBP', merchant_reference='AA_1234', card_number='4500203021916406', expiry_date='10/14', ccv='345') # Two-stage processing (using pre-registered card) response = gateway.pre(amount=D('50.00'), currency='GBP', previous_txn_reference='3000000088888888') response = gateway.fulfill(amount=D('50.00'), currency='GBP', txn_reference=response['datacash_reference'])
The gateway object know nothing of Oscar's classes and can be used in a stand-alone manner.
datacash.facade.Facade wraps the above gateway object and provides a
less granular API, as well as saving instances of
provide an audit trail for Datacash activity.
DATACASH_HOST- Host of DataCash server
DATACASH_CURRENCY- Currency to use for transactions
DATACASH_USE_CV2AVS- Whether to pass CV2AVS data
DATACASH_CAPTURE_METHOD- The 'capture method' to use. Defaults to 'ecomm'.
To work on
django-oscar-datacash, clone the repo, set up a virtualenv and install
in develop mode:
python setup.py develop
then install the testing dependencies:
pip install -r requirements.txt
The test suite can then be run using: