feat: Add Dynamic Payment Methods BNPL (#4115)

REV-3821

ecommerce/extensions/basket/constants.py

@@ -2,6 +2,7 @@
 EMAIL_OPT_IN_ATTRIBUTE = "email_opt_in"
 PURCHASER_BEHALF_ATTRIBUTE = "purchased_for_organization"
 PAYMENT_INTENT_ID_ATTRIBUTE = "payment_intent_id"
+DYNAMIC_PAYMENT_METHODS_ENABLED = "dynamic_payment_methods_enabled"
 
 # .. toggle_name: enable_stripe_payment_processor
 # .. toggle_type: waffle_flag

ecommerce/extensions/basket/tests/test_views.py

@@ -36,7 +36,12 @@
 from ecommerce.extensions.basket.constants import EMAIL_OPT_IN_ATTRIBUTE, ENABLE_STRIPE_PAYMENT_PROCESSOR
 from ecommerce.extensions.basket.tests.mixins import BasketMixin
 from ecommerce.extensions.basket.tests.test_utils import TEST_BUNDLE_ID
-from ecommerce.extensions.basket.utils import _set_basket_bundle_status, apply_voucher_on_basket_and_check_discount
+from ecommerce.extensions.basket.utils import (
+    _set_basket_bundle_status,
+    apply_voucher_on_basket_and_check_discount,
+    basket_add_dynamic_payment_methods_enabled,
+    basket_add_payment_intent_id_attribute
+)
 from ecommerce.extensions.catalogue.tests.mixins import DiscoveryTestMixin
 from ecommerce.extensions.offer.constants import DYNAMIC_DISCOUNT_FLAG
 from ecommerce.extensions.offer.utils import format_benefit_value
@@ -325,6 +330,13 @@ def create_basket_and_add_product(self, product):
         basket.add_product(product, 1)
         return basket
 
+    def create_basket_and_add_product_stripe(self, product, payment_intent_id, payment_intent):
+        basket = self.create_empty_basket()
+        basket.add_product(product, 1)
+        basket_add_dynamic_payment_methods_enabled(basket, payment_intent)
+        basket_add_payment_intent_id_attribute(basket, payment_intent_id)
+        return basket
+
     def create_seat(self, course, seat_price=100, cert_type='verified'):
         return course.create_or_update_seat(cert_type, True, seat_price)
 
@@ -404,6 +416,7 @@ def assert_expected_response(
             self,
             basket,
             enable_stripe_payment_processor=False,
+            is_dynamic_payment_methods_enabled=None,
             url=None,
             response=None,
             status_code=200,
@@ -421,6 +434,7 @@ def assert_expected_response(
             subject=None,
             messages=None,
             summary_discounts=None,
+            payment_intent_id=None,
             **kwargs
     ):
         if response is None:
@@ -458,6 +472,7 @@ def assert_expected_response(
             'basket_id': basket.id,
             'currency': currency,
             'enable_stripe_payment_processor': enable_stripe_payment_processor,
+            'is_dynamic_payment_methods_enabled': is_dynamic_payment_methods_enabled,
             'offers': offers,
             'coupons': coupons,
             'messages': messages if messages else [],
@@ -466,6 +481,7 @@ def assert_expected_response(
             'summary_discounts': summary_discounts,
             'summary_price': summary_price,
             'order_total': order_total,
+            'payment_intent_id': payment_intent_id,
             'products': [
                 {
                     'product_type': product_type,
@@ -712,6 +728,30 @@ def test_enable_stripe_payment_processor_flag(self, enable_stripe_payment_proces
                 enable_stripe_payment_processor=enable_stripe_payment_processor,
             )
 
+    def test_cart_with_stripe_data(self):
+        """
+        For Dynamic Payment Methods, the basket will contain Payment Intent information.
+        Verify that the basket contains Payment Intent ID and if DPM is enabled.
+        """
+        payment_intent_id = 'pi_3OqcQ5H4caH7G0X11y8NKNa4'
+        payment_intent = {
+            'payment_method_types': [
+                'card',
+                'klarna',
+            ]
+        }
+        seat = self.create_seat(self.course)
+        basket = self.create_basket_and_add_product_stripe(
+            seat, payment_intent_id, payment_intent
+        )
+        response = self.client.get(self.path)
+        self.assert_expected_response(
+            basket,
+            response=response,
+            is_dynamic_payment_methods_enabled=len(payment_intent['payment_method_types']) > 1,
+            payment_intent_id=payment_intent_id
+        )
+
     @responses.activate
     def test_enterprise_free_basket_redirect(self):
         """

ecommerce/extensions/basket/utils.py

@@ -19,6 +19,7 @@
 from ecommerce.courses.utils import mode_for_product
 from ecommerce.extensions.analytics.utils import track_segment_event
 from ecommerce.extensions.basket.constants import (
+    DYNAMIC_PAYMENT_METHODS_ENABLED,
     EMAIL_OPT_IN_ATTRIBUTE,
     ENABLE_STRIPE_PAYMENT_PROCESSOR,
     PAYMENT_INTENT_ID_ATTRIBUTE,
@@ -394,6 +395,24 @@ def basket_add_organization_attribute(basket, request_data):
         )
 
 
+@newrelic.agent.function_trace()
+def basket_add_dynamic_payment_methods_enabled(basket, payment_intent):
+    """
+    Adds a boolean value which is True if there is more than
+    'card' payment method type in the Stripe Payment Intent.
+    """
+    dynamic_payment_methods_enabled_attribute, __ = BasketAttributeType.objects.get_or_create(
+        name=DYNAMIC_PAYMENT_METHODS_ENABLED)
+    # Do a get_or_create and update value_text after (instead of update_or_create)
+    # to prevent a particularly slow full table scan that uses a LIKE
+    basket_attribute, __ = BasketAttribute.objects.get_or_create(
+        attribute_type=dynamic_payment_methods_enabled_attribute,
+        basket=basket,
+    )
+    basket_attribute.value_text = len(payment_intent['payment_method_types']) > 1
+    basket_attribute.save()
+
+
 @newrelic.agent.function_trace()
 def basket_add_payment_intent_id_attribute(basket, payment_intent_id):
     """

ecommerce/extensions/basket/views.py

@@ -47,7 +47,11 @@
     translate_basket_line_for_segment
 )
 from ecommerce.extensions.basket import message_utils
-from ecommerce.extensions.basket.constants import ENABLE_STRIPE_PAYMENT_PROCESSOR
+from ecommerce.extensions.basket.constants import (
+    DYNAMIC_PAYMENT_METHODS_ENABLED,
+    ENABLE_STRIPE_PAYMENT_PROCESSOR,
+    PAYMENT_INTENT_ID_ATTRIBUTE
+)
 from ecommerce.extensions.basket.exceptions import BadRequestException, RedirectException, VoucherException
 from ecommerce.extensions.basket.utils import (
     add_invalid_code_message_to_url,
@@ -677,6 +681,8 @@ def _serialize_context(self, context, lines_data):
         self._add_offers(response)
         self._add_coupons(response, context)
         self._add_enable_stripe_payment_processor(response)
+        self._add_payment_intent_id(response, self.request.basket)
+        self._add_is_dynamic_payment_methods(response, self.request.basket)
         return response
 
     def _add_products(self, response, lines_data):
@@ -739,6 +745,30 @@ def _add_enable_stripe_payment_processor(self, response):
             self.request, ENABLE_STRIPE_PAYMENT_PROCESSOR
         )
 
+    def _add_payment_intent_id(self, response, basket):
+        try:
+            payment_intent_id_attribute = BasketAttributeType.objects.get(name=PAYMENT_INTENT_ID_ATTRIBUTE)
+            payment_intent_attr = BasketAttribute.objects.get(
+                basket=basket,
+                attribute_type=payment_intent_id_attribute
+            )
+            response['payment_intent_id'] = payment_intent_attr.value_text.strip()
+        except (BasketAttribute.DoesNotExist, BasketAttributeType.DoesNotExist):
+            response['payment_intent_id'] = None
+
+    def _add_is_dynamic_payment_methods(self, response, basket):
+        try:
+            dynamic_payment_methods_enabled_attribute = BasketAttributeType.objects.get(
+                name=DYNAMIC_PAYMENT_METHODS_ENABLED)
+            payment_intent_attr = BasketAttribute.objects.get(
+                basket=basket,
+                attribute_type=dynamic_payment_methods_enabled_attribute
+            )
+            is_dynamic_payment_methods_enabled = payment_intent_attr.value_text.strip()
+            response['is_dynamic_payment_methods_enabled'] = is_dynamic_payment_methods_enabled == 'True'
+        except (BasketAttribute.DoesNotExist, BasketAttributeType.DoesNotExist):
+            response['is_dynamic_payment_methods_enabled'] = None
+
     def _get_response_status(self, response):
         return message_utils.get_response_status(response['messages'])
 

ecommerce/extensions/checkout/mixins.py

@@ -93,7 +93,7 @@ def add_payment_event(self, event):  # pylint: disable = arguments-differ
             self._payment_events = []
         self._payment_events.append(event)
 
-    def handle_payment(self, response, basket):  # pylint: disable=arguments-differ
+    def handle_payment(self, response, basket):  # pylint: disable=arguments-differ, inconsistent-return-statements
         """
         Handle any payment processing and record payment sources and events.
 
@@ -111,14 +111,26 @@ def handle_payment(self, response, basket):  # pylint: disable=arguments-differ
         # If payment didn't go through, the handle_processor_response function will raise an error. We want to
         # send the event regardless of if the payment didn't go through.
         try:
-            handled_processor_response = self.payment_processor.handle_processor_response(response, basket=basket)
+            processor_response = self.payment_processor.handle_processor_response(response, basket=basket)
         except Exception as ex:
             properties.update({'success': False, 'payment_error': type(ex).__name__, })
             raise
         else:
+            # If the processor_response has a status, it's a InProgressProcessorResponse,
+            # which means the payment is part of dynamic payment methods
+            if 'status' in processor_response._fields:
+                logger.info(
+                    'Dynamic Payment Method in progress for edX order %s and basket %s, '
+                    'returning Payment Intent %s with status %s to the payment MFE.',
+                    processor_response.order_number,
+                    processor_response.basket_id,
+                    processor_response.transaction_id,
+                    processor_response.status,
+                )
+                return processor_response
             # We only record successful payments in the database.
-            self.record_payment(basket, handled_processor_response)
-            properties.update({'total': handled_processor_response.total, 'success': True, })
+            self.record_payment(basket, processor_response)
+            properties.update({'total': processor_response.total, 'success': True, })
         finally:
             track_segment_event(basket.site, basket.owner, 'Payment Processor Response', properties)
 

ecommerce/extensions/payment/processors/__init__.py

@@ -14,6 +14,10 @@
 HandledProcessorResponse = namedtuple('HandledProcessorResponse',
                                       ['transaction_id', 'total', 'currency', 'card_number', 'card_type'])
 
+InProgressProcessorResponse = namedtuple('InProgressProcessorResponse',
+                                         ['basket_id', 'order_number', 'transaction_id', 'confirmation_client_secret',
+                                          'status', 'payment_method', 'total'])
+
 logger = logging.getLogger(__name__)