Implement handling invoice.payment_succeeded and invoice.payment_failed webhooks

hosting/models.py

@@ -435,6 +435,19 @@ class HostingBillLineItem(AssignPermissionsMixin, models.Model):
             ('view_hostingbilllineitem', 'View Monthly Hosting Bill Line Item'),
         )
 
+    def get_vm_id(self):
+        """
+        If VM_ID is set in the metadata extract and return it as integer
+        other return -1
+
+        :return:
+        """
+        if "VM_ID" in self.metadata:
+            data = json.loads(self.metadata)
+            return int(data["VM_ID"])
+        else:
+            return None
+
 
 class VMDetail(models.Model):
     user = models.ForeignKey(CustomUser)