diff --git a/apps/promotions/models.py b/apps/promotions/models.py
index 77ad649..43a5cc9 100644
--- a/apps/promotions/models.py
+++ b/apps/promotions/models.py
@@ -15,10 +15,8 @@ class EventQuerySet(models.QuerySet):
     pass
 
 class Event(BaseModel):
-    actor = None
-    target = None
-    label = None
-    details = {}
+    label = models.CharField(max_length=255, db_index=True)
+    details = models.JSONField()  # from to amount application user etc
 
     objects = EventQuerySet.as_manager()
 
@@ -28,6 +26,8 @@ class Event(BaseModel):
 
 
 class PlanQuerySet(models.QuerySet):
+
+    # this is for list of discount code for example
     def calculate(self, user, application=None):
         for plan in self.filter(application=application)[:10]:
             if not Promotion.objects.used(user):