diff --git a/backend/account/models.py b/backend/account/models.py
index b270618..da7d7cf 100644
--- a/backend/account/models.py
+++ b/backend/account/models.py
@@ -241,4 +241,11 @@ class SecurityBreachAttemptModel(models.Model):
         return f'تلاش نفوذ از {self.ip_address} در {self.city}, {self.country}'
     class Meta:
         verbose_name = "تلاش نفوذ"
-        verbose_name_plural = "تلاش‌های نفوذ"
\ No newline at end of file
+        verbose_name_plural = "تلاش‌های نفوذ"
+
+# class NotifModel(models.Model):
+#     subject = models.CharField(max_length=100)
+#     description = models.TextField()
+
+#     def __str__(self):
+#         return f'{self.subject[:30]}'
\ No newline at end of file
diff --git a/backend/core/settings/base.py b/backend/core/settings/base.py
index 1c00999..ababbb6 100644
--- a/backend/core/settings/base.py
+++ b/backend/core/settings/base.py
@@ -143,7 +143,7 @@ USE_TZ = True
 # Static Files Configuration
 # ==============================================================================
 STATICFILES_DIRS = [
-    os.path.join(BASE_DIR, "custom_static"),
+    # os.path.join(BASE_DIR, "custom_static"),
     BASE_DIR / "core" / "static",
 ]
 
diff --git a/backend/order/apps.py b/backend/order/apps.py
index 60f4dff..eca896d 100644
--- a/backend/order/apps.py
+++ b/backend/order/apps.py
@@ -5,3 +5,6 @@ class OrderConfig(AppConfig):
     default_auto_field = 'django.db.models.BigAutoField'
     name = 'order'
     verbose_name = 'سفارش'
+
+    def ready(self):
+        import order.signals
\ No newline at end of file
diff --git a/backend/order/signals.py b/backend/order/signals.py
new file mode 100644
index 0000000..b2234b9
--- /dev/null
+++ b/backend/order/signals.py
@@ -0,0 +1,23 @@
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+from .models import OrderModel
+
+@receiver(pre_save, sender=OrderModel)
+def order_status_changed(sender, instance, **kwargs):
+    if instance.pk:
+        previous = OrderModel.objects.get(pk=instance.pk)
+
+        print(f'pervios {previous.status} instance {instance.status}')
+        if previous.status != instance.status:
+            send_change_status_notif(instance)
+
+
+def send_change_status_notif(order):
+    pass
+
+def update_cart_price_fields(order):
+    pass
+
+def update_sell_data(order):
+    pass
+
diff --git a/backend/order/urls.py b/backend/order/urls.py
index 969c612..e81de18 100644
--- a/backend/order/urls.py
+++ b/backend/order/urls.py
@@ -10,7 +10,7 @@ urlpatterns = [
     path('cart/discount', ApplyDiscountView.as_view()),
     path('cart/all', CartItemClear.as_view()),
     path('cart/item/<int:pk>', CartItemViews.as_view(), name='change-item-cart'),
-    path('payment', PaymentView.as_view(), name='payment'),
+    path('cart/payment', PaymentView.as_view(), name='payment'),
     path('callback', callback_view, name='callback-gateway'),
     path('<int:pk>', OrderGetView.as_view(), name='order-get'),
 ]
diff --git a/backend/order/views.py b/backend/order/views.py
index 2f2c5b5..08c39b6 100644
--- a/backend/order/views.py
+++ b/backend/order/views.py
@@ -176,9 +176,22 @@ class OrderGetView(APIView):
         order_ser = self.serializer_class(order_object, context={'request': request})
         return Response(order_ser.data, status=status.HTTP_200_OK)
 
+
+
+from rest_framework import serializers 
+
+class BankTypeSerializer(serializers.Serializer):
+    gateway_type = serializers.ChoiceField(choices=['BMI', 'SEP', 'ZARINPAL', 'IDPAY', 'ZIBAL', 'BAHAMTA', 'MELLAT', 'PAYV1'])
+
+
 class PaymentView(APIView):
     permission_classes = [IsAuthenticated]
+    @extend_schema(
+        request=BankTypeSerializer, 
+        description="choices=['BMI', 'SEP', 'ZARINPAL', 'IDPAY', 'ZIBAL', 'BAHAMTA', 'MELLAT', 'PAYV1']"
+    )
     def post(self, request):
+        print(request.data.get('gateway_type'))
         cart_order = get_object_or_404(OrderModel, user=request.user, status='CART')
         amount = 5000
         user_mobile_number = request.user.phone