Add "Pay by bank" option for UK customers via Stripe (#5648)

* Add support for 'Pay by bank (UK)' payment method via Stripe

* Add 'Pay by bank' payment provider to Stripe integration

* Enhance Stripe integration: Allow UK bank payments and update imports

* Remove UK-specific payment method options from StripePayByBank integration

* Remove some UK references

---------

Co-authored-by: Raphael Michel <michel@rami.io>

src/pretix/plugins/stripe/payment.py

@@ -412,6 +412,18 @@ class StripeSettingsHolder(BasePaymentProvider):
                                  'before they work properly.'),
                      required=False,
                  )),
+                ('method_pay_by_bank',
+                 forms.BooleanField(
+                     label=_('Pay by bank'),
+                     disabled=self.event.currency not in ['EUR', 'GBP'],
+                     help_text=' '.join([
+                         str(_('Some payment methods might need to be enabled in the settings of your Stripe account '
+                               'before they work properly.')),
+                         str(_('Currently only available for charges in GBP and customers with UK bank accounts, and '
+                               'in private preview for France and Germany.'))
+                     ]),
+                     required=False,
+                 )),
                 ('method_wechatpay',
                  forms.BooleanField(
                      label=_('WeChat Pay'),
@@ -1810,6 +1822,32 @@ class StripeRevolutPay(StripeRedirectMethod):
         }
 
 
+class StripePayByBank(StripeRedirectMethod):
+    identifier = 'stripe_pay_by_bank'
+    verbose_name = _('Pay by bank via Stripe')
+    public_name = _('Pay by bank')
+    method = 'pay_by_bank'
+    redirect_in_widget_allowed = False
+    confirmation_method = 'automatic'
+    explanation = _(
+        'Pay by bank allows you to authorize a secure Open Banking payment from your banking app. Currently available '
+        'only with a UK bank account.'
+    )
+
+    def is_allowed(self, request: HttpRequest, total: Decimal=None) -> bool:
+        return super().is_allowed(request, total) and self.event.currency == 'GBP'
+
+    def _payment_intent_kwargs(self, request, payment):
+        return {
+            "payment_method_data": {
+                "type": "pay_by_bank",
+                "billing_details": {
+                    "email": payment.order.email,
+                },
+            },
+        }
+
+
 class StripePayPal(StripeRedirectMethod):
     identifier = 'stripe_paypal'
     verbose_name = _('PayPal via Stripe')

src/pretix/plugins/stripe/signals.py

@@ -46,15 +46,15 @@ def register_payment_provider(sender, **kwargs):
     from .payment import (
         StripeAffirm, StripeAlipay, StripeBancontact, StripeCC, StripeEPS,
         StripeGiropay, StripeIdeal, StripeKlarna, StripeMobilePay,
-        StripeMultibanco, StripePayPal, StripePrzelewy24, StripeRevolutPay,
-        StripeSEPADirectDebit, StripeSettingsHolder, StripeSofort, StripeSwish,
-        StripeTwint, StripeWeChatPay,
+        StripeMultibanco, StripePayByBank, StripePayPal, StripePrzelewy24,
+        StripeRevolutPay, StripeSEPADirectDebit, StripeSettingsHolder,
+        StripeSofort, StripeSwish, StripeTwint, StripeWeChatPay,
     )
 
     return [
         StripeSettingsHolder, StripeCC, StripeGiropay, StripeIdeal, StripeAlipay, StripeBancontact,
         StripeSofort, StripeEPS, StripeMultibanco, StripePrzelewy24, StripeRevolutPay, StripeWeChatPay,
-        StripeSEPADirectDebit, StripeAffirm, StripeKlarna, StripePayPal, StripeSwish, StripeTwint, StripeMobilePay
+        StripeSEPADirectDebit, StripeAffirm, StripeKlarna, StripePayByBank, StripePayPal, StripeSwish, StripeTwint, StripeMobilePay
     ]