Introduce new epp error api #2588

app/controllers/epp_controller.rb

@@ -8,6 +8,18 @@ class EppController < ApplicationController
   before_action :latin_only
   before_action :validate_request
   before_action :update_epp_session
+
+  around_action :catch_epp_errors
+  def catch_epp_errors
+    err = catch(:epp_error) do
+      yield
+      nil
+    end
+    return unless err
+    @errors = [err]
+    handle_errors
+  end
+
   helper_method :current_user
 
   rescue_from StandardError do |e|

app/models/epp/domain.rb

@@ -617,8 +617,10 @@ class Epp::Domain < Domain
   def reject_transfer(frame, current_user)
     pt = pending_transfer
     if current_user.registrar != pt.transfer_from
-      add_epp_error('2304', nil, nil, I18n.t('transfer_can_be_rejected_only_by_current_registrar'))
-      return false
+      throw :epp_error, {
+        msg: I18n.t('transfer_can_be_rejected_only_by_current_registrar'),
+        code: '2304'
+      }
     end
 
     transaction do