Move interactor to the Domains namespace

app/interactions/domains/update_confirm/process_update_rejected.rb

@@ -0,0 +1,18 @@
+module Domains
+  module UpdateConfirm
+    class ProcessUpdateRejected < Base
+      def execute
+        ActiveRecord::Base.transaction do
+          RegistrantChangeMailer.rejected(domain: domain,
+                                          registrar: domain.registrar,
+                                          registrant: domain.registrant).deliver_now
+
+          notify_registrar(:poll_pending_update_rejected_by_registrant)
+
+          preclean_pendings
+          clean_pendings!
+        end
+      end
+    end
+  end
+end