feat(wallet): implement wallet transaction model, views, and serializers for fund management ✨

billing/serializers.py

@@ -1,5 +1,5 @@
 from rest_framework import serializers
-from .models import Payment, Topup
+from .models import Payment, Topup, WalletTransaction
 from devices.serializers import AdminDeviceSerializer
 
 
@@ -69,3 +69,23 @@ class TopupSerializer(serializers.ModelSerializer):
             "updated_at",
         ]
         read_only_fields = ["id", "created_at", "updated_at"]
+
+
+class WalletTransactionSerializer(serializers.ModelSerializer):
+    user = serializers.SerializerMethodField()
+
+    def get_user(self, obj):
+        user = obj.user
+        if user:
+            return {
+                "id": user.id,
+                "name": user.first_name + " " + user.last_name,
+                "id_card": user.id_card,
+                "mobile": user.mobile,
+            }
+        return None
+
+    class Meta:  # type: ignore
+        model = WalletTransaction
+        fields = "__all__"
+        read_only_fields = ["id", "created_at", "updated_at"]