Payment providers: Add priority flag

src/pretix/base/models/event.py

@@ -632,7 +632,9 @@ class Event(EventMixin, LoggedModel):
                     pp = p(self)
                     providers[pp.identifier] = pp
 
-            self._cached_payment_providers = OrderedDict(sorted(providers.items(), key=lambda v: str(v[1].verbose_name)))
+            self._cached_payment_providers = OrderedDict(sorted(
+                providers.items(), key=lambda v: (-v[1].priority, str(v[1].verbose_name))
+            ))
         return self._cached_payment_providers
 
     def get_html_mail_renderer(self):

src/pretix/base/payment.py

@@ -83,6 +83,14 @@ class BasePaymentProvider:
         """
         return False
 
+    @property
+    def priority(self) -> int:
+        """
+        Returns a priority that is used for sorting payment providers. Higher priority means higher up in the list.
+        Default to 100. Providers with same priority are sorted alphabetically.
+        """
+        return 100
+
     @property
     def is_enabled(self) -> bool:
         """
@@ -925,6 +933,7 @@ class OffsettingProvider(BasePaymentProvider):
 class GiftCardPayment(BasePaymentProvider):
     identifier = "giftcard"
     verbose_name = _("Gift card")
+    priority = 10
 
     @property
     def settings_form_fields(self):