Merge pull request #2028 from internetee/1017-rate-throttling

Add request throttling

app/controllers/epp/base_controller.rb

@@ -20,13 +20,23 @@ module Epp
 
     rescue_from StandardError, with: :respond_with_command_failed_error
     rescue_from AuthorizationError, with: :respond_with_authorization_error
+    rescue_from Shunter::ThrottleError, with: :respond_with_session_limit_exceeded_error
     rescue_from ActiveRecord::RecordNotFound, with: :respond_with_object_does_not_exist_error
+
     before_action :set_paper_trail_whodunnit
 
     skip_before_action :validate_against_schema
 
     protected
 
+    def respond_with_session_limit_exceeded_error(exception)
+      epp_errors.add(:epp_errors,
+                     code: '2502',
+                     msg: Shunter.default_error_message)
+      handle_errors
+      log_exception(exception)
+    end
+
     def respond_with_command_failed_error(exception)
       epp_errors.add(:epp_errors,
                      code: '2400',
@@ -51,6 +61,11 @@ module Epp
 
     private
 
+    def throttled_user
+      authorize!(:throttled_user, @domain) unless current_user || instance_of?(Epp::SessionsController)
+      current_user
+    end
+
     def wrap_exceptions
       yield
     rescue CanCan::AccessDenied

app/controllers/epp/contacts_controller.rb

@@ -5,6 +5,9 @@ module Epp
     before_action :find_contact, only: [:info, :update, :delete]
     before_action :find_password, only: [:info, :update, :delete]
 
+    THROTTLED_ACTIONS = %i[info check create renew update transfer delete].freeze
+    include Shunter::Integration::Throttle
+
     def info
       authorize! :info, @contact, @password
       render_epp_response 'epp/contacts/info'

app/controllers/epp/domains_controller.rb

@@ -6,6 +6,9 @@ module Epp
     before_action :set_paper_trail_whodunnit
     before_action :parse_schemas_prefix_and_version
 
+    THROTTLED_ACTIONS = %i[info create check renew update transfer delete].freeze
+    include Shunter::Integration::Throttle
+
     def info
       authorize! :info, @domain
 

app/controllers/epp/polls_controller.rb

@@ -1,5 +1,8 @@
 module Epp
   class PollsController < BaseController
+    THROTTLED_ACTIONS = %i[poll].freeze
+    include Shunter::Integration::Throttle
+
     def poll
       authorize! :manage, :poll
       req_poll if params[:parsed_frame].css('poll').first['op'] == 'req'

app/controllers/epp/sessions_controller.rb

@@ -3,6 +3,9 @@ module Epp
     skip_authorization_check only: [:hello, :login, :logout]
     before_action :set_paper_trail_whodunnit
 
+    THROTTLED_ACTIONS = %i[login hello].freeze
+    include Shunter::Integration::Throttle
+
     def hello
       render_epp_response('greeting')
     end

app/controllers/repp/v1/accounts_controller.rb

@@ -3,6 +3,11 @@ module Repp
     class AccountsController < BaseController # rubocop:disable Metrics/ClassLength
       load_and_authorize_resource
 
+      THROTTLED_ACTIONS = %i[
+        index balance details update_auto_reload_balance disable_auto_reload_balance switch_user update
+      ].freeze
+      include Shunter::Integration::Throttle
+
       api :get, '/repp/v1/accounts'
       desc 'Get all activities'
       def index

app/controllers/repp/v1/base_controller.rb

@@ -27,6 +27,10 @@ module Repp
         @response = { code: 2201, message: 'Authorization error' }
         logger.error e.to_s
         render(json: @response, status: :unauthorized)
+      rescue Shunter::ThrottleError => e
+        @response = { code: 2502, message: Shunter.default_error_message }
+        logger.error e.to_s
+        render(json: @response, status: :bad_request)
       ensure
         create_repp_log
       end
@@ -167,6 +171,11 @@ module Repp
         data[:abilities] = Ability.new(current_user).permissions
         data
       end
+
+      def throttled_user
+        authorize!(:throttled_user, @domain) unless current_user || action_name == 'tara_callback'
+        current_user
+      end
     end
   end
 end

app/controllers/repp/v1/contacts_controller.rb

@@ -5,6 +5,9 @@ module Repp
       before_action :find_contact, only: %i[show update destroy]
       skip_around_action :log_request, only: :search
 
+      THROTTLED_ACTIONS = %i[index check search create show update destroy].freeze
+      include Shunter::Integration::Throttle
+
       api :get, '/repp/v1/contacts'
       desc 'Get all existing contacts'
       def index

app/controllers/repp/v1/domains/admin_contacts_controller.rb

@@ -2,6 +2,9 @@ module Repp
   module V1
     module Domains
       class AdminContactsController < BaseContactsController
+        THROTTLED_ACTIONS = %i[update].freeze
+        include Shunter::Integration::Throttle
+
         def update
           super
 

app/controllers/repp/v1/domains/contacts_controller.rb

@@ -4,6 +4,9 @@ module Repp
       class ContactsController < BaseContactsController
         before_action :set_domain, only: %i[index create destroy]
 
+        THROTTLED_ACTIONS = %i[index create destroy update].freeze
+        include Shunter::Integration::Throttle
+
         def_param_group :contacts_apidoc do
           param :contacts, Array, required: true, desc: 'Array of new linked contacts' do
             param :code, String, required: true, desc: 'Contact code'

app/controllers/repp/v1/domains/dnssec_controller.rb

@@ -4,6 +4,9 @@ module Repp
       class DnssecController < BaseController
         before_action :set_domain, only: %i[index create destroy]
 
+        THROTTLED_ACTIONS = %i[index create destroy].freeze
+        include Shunter::Integration::Throttle
+
         def_param_group :dns_keys_apidoc do
           param :flags, String, required: true, desc: '256 (KSK) or 257 (ZSK)'
           param :protocol, String, required: true, desc: 'Key protocol (3)'

app/controllers/repp/v1/domains/nameservers_controller.rb

@@ -5,6 +5,9 @@ module Repp
         before_action :set_domain, only: %i[index create destroy]
         before_action :set_nameserver, only: %i[destroy]
 
+        THROTTLED_ACTIONS = %i[index create destroy].freeze
+        include Shunter::Integration::Throttle
+
         api :GET, '/repp/v1/domains/:domain_name/nameservers'
         desc "Get domain's nameservers"
         def index

app/controllers/repp/v1/domains/renews_controller.rb

@@ -6,6 +6,9 @@ module Repp
         before_action :select_renewable_domains, only: [:bulk_renew]
         before_action :set_domain, only: [:create]
 
+        THROTTLED_ACTIONS = %i[create bulk_renew].freeze
+        include Shunter::Integration::Throttle
+
         api :POST, 'repp/v1/domains/:domain_name/renew'
         desc 'Renew domain'
         param :renews, Hash, required: true, desc: 'Renew parameters' do

app/controllers/repp/v1/domains/statuses_controller.rb

@@ -5,6 +5,9 @@ module Repp
         before_action :set_domain, only: %i[update destroy]
         before_action :verify_status
 
+        THROTTLED_ACTIONS = %i[update destroy].freeze
+        include Shunter::Integration::Throttle
+
         api :DELETE, '/repp/v1/domains/:domain_name/statuses/:status'
         param :domain_name, String, desc: 'Domain name'
         desc 'Remove status from specific domain'

app/controllers/repp/v1/domains/transfers_controller.rb

@@ -4,6 +4,9 @@ module Repp
       class TransfersController < BaseController
         before_action :set_domain, only: [:create]
 
+        THROTTLED_ACTIONS = %i[create].freeze
+        include Shunter::Integration::Throttle
+
         api :POST, 'repp/v1/domains/:domain_name/transfer'
         desc 'Transfer a specific domain'
         param :transfer, Hash, required: true, desc: 'Renew parameters' do

app/controllers/repp/v1/domains_controller.rb

@@ -8,6 +8,9 @@ module Repp
       before_action :forward_registrar_id, only: %i[create update destroy]
       before_action :set_domain, only: %i[update]
 
+      THROTTLED_ACTIONS = %i[transfer_info transfer index create show update destroy].freeze
+      include Shunter::Integration::Throttle
+
       api :GET, '/repp/v1/domains'
       desc 'Get all existing domains'
       def index

app/controllers/repp/v1/invoices_controller.rb

@@ -4,6 +4,9 @@ module Repp
     class InvoicesController < BaseController # rubocop:disable Metrics/ClassLength
       load_and_authorize_resource
 
+      THROTTLED_ACTIONS = %i[download add_credit send_to_recipient cancel index show].freeze
+      include Shunter::Integration::Throttle
+
       # rubocop:disable Metrics/MethodLength
       api :get, '/repp/v1/invoices'
       desc 'Get all invoices'

app/controllers/repp/v1/registrar/accreditation_info_controller.rb

@@ -3,6 +3,9 @@ module Repp
     module Registrar
       class AccreditationInfoController < BaseController
         if Feature.allow_accr_endspoints?
+        THROTTLED_ACTIONS = %i[index].freeze
+        include Shunter::Integration::Throttle
+
         api :GET, 'repp/v1/registrar/accreditation/get_info'
         desc 'check login user and return data'
 

app/controllers/repp/v1/registrar/auth_controller.rb

@@ -6,6 +6,9 @@ module Repp
         skip_before_action :check_ip_restriction, only: :tara_callback
         skip_before_action :validate_client_certs, only: :tara_callback
 
+        THROTTLED_ACTIONS = %i[index tara_callback].freeze
+        include Shunter::Integration::Throttle
+
         api :GET, 'repp/v1/registrar/auth'
         desc 'check user auth info and return data'
         def index

app/controllers/repp/v1/registrar/nameservers_controller.rb

@@ -4,6 +4,9 @@ module Repp
       class NameserversController < BaseController
         before_action :verify_nameserver_existance, only: %i[update]
 
+        THROTTLED_ACTIONS = %i[put].freeze
+        include Shunter::Integration::Throttle
+
         api :PUT, 'repp/v1/registrar/nameservers'
         desc 'bulk nameserver change'
         param :data, Hash, required: true, desc: 'Object holding nameserver changes' do

app/controllers/repp/v1/registrar/notifications_controller.rb

@@ -4,6 +4,9 @@ module Repp
       class NotificationsController < BaseController
         before_action :set_notification, only: %i[update show]
 
+        THROTTLED_ACTIONS = %i[all_notifications index show update].freeze
+        include Shunter::Integration::Throttle
+
         api :GET, '/repp/v1/registrar/notifications'
         desc 'Get the latest unread poll message'
         def index

app/controllers/repp/v1/registrar/summary_controller.rb

@@ -2,6 +2,9 @@ module Repp
   module V1
     module Registrar
       class SummaryController < BaseController
+        THROTTLED_ACTIONS = %i[index].freeze
+        include Shunter::Integration::Throttle
+
         api :GET, 'repp/v1/registrar/summary'
         desc 'check user summary info and return data'
 

app/lib/shunter.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+module Shunter
+  module_function
+
+  class ThrottleError < StandardError; end
+
+  BASE_LOGGER = ::Logger.new($stdout)
+  ONE_MINUTE = 60
+  ONE_HUNDRED_REQUESTS = 100
+
+  BASE_CONNECTION = {
+    host: ENV['shunter_redis_host'] || 'redis',
+    port: (ENV['shunter_redis_port'] || '6379').to_i,
+  }.freeze
+
+  def default_error_message
+    "Session limit exceeded. Current limit is #{default_threshold} in #{default_timespan} seconds"
+  end
+
+  def default_timespan
+    ENV['shunter_default_timespan'] || ONE_MINUTE
+  end
+
+  def default_threshold
+    ENV['shunter_default_threshold'] || ONE_HUNDRED_REQUESTS
+  end
+
+  def default_adapter
+    ENV['shunter_default_adapter'] || 'Shunter::Adapters::Redis'
+  end
+
+  def feature_enabled?
+    ActiveModel::Type::Boolean.new.cast(ENV['shunter_enabled'] || 'false')
+  end
+end

app/lib/shunter/adapters/memory.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Shunter
+  module Adapters
+    class Memory
+      attr_reader :store
+
+      def initialize(_options = {})
+        @@store ||= {}
+      end
+
+      def find_counter(key)
+        @@store[key]
+      end
+
+      def write_counter(key)
+        @@store[key] = 1
+      end
+
+      def increment_counter(key)
+        @@store[key] += 1
+      end
+
+      def clear!
+        @@store = {}
+      end
+
+      def expire_counter(_key, _timespan); end
+    end
+  end
+end

app/lib/shunter/adapters/redis.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module Shunter
+  module Adapters
+    class Redis
+      attr_reader :redis
+
+      def initialize(options)
+        @redis = ::Redis.new(options)
+      end
+
+      def find_counter(key)
+        @redis.get(key)
+      end
+
+      def write_counter(key)
+        @redis.set(key, 1)
+      end
+
+      def increment_counter(key)
+        @redis.incr(key)
+      end
+
+      def expire_counter(key, timespan)
+        @redis.expire(key, timespan)
+      end
+    end
+  end
+end

app/lib/shunter/base.rb

@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+module Shunter
+  class Base
+    attr_accessor :user_id, :adapter
+
+    def initialize(options = {})
+      @user_id = options[:user_id]
+      adapter_klass = Shunter.default_adapter.constantize
+      @adapter = adapter_klass.new(options[:conn_options])
+    end
+
+    def user_key
+      "counting_#{@user_id}"
+    end
+
+    def blocked_user_key
+      "blocked_#{@user_id}"
+    end
+
+    def throttle
+      return false if blocked?
+
+      valid_counter?
+    end
+
+    def blocked?
+      adapter.find_counter(blocked_user_key).present?
+    end
+
+    def valid_counter?
+      if adapter.find_counter(user_key)
+        number_of_requests = adapter.increment_counter(user_key)
+        if number_of_requests > allowed_requests.to_i
+          init_counter(blocked_user_key)
+          return false
+        end
+      else
+        init_counter(user_key)
+      end
+      true
+    end
+
+    private
+
+    def init_counter(key)
+      adapter.write_counter(key)
+      adapter.expire_counter(key, timespan)
+    end
+
+    def allowed_requests
+      Shunter.default_threshold
+    end
+
+    def timespan
+      Shunter.default_timespan
+    end
+
+    def logger
+      Shunter::BASE_LOGGER
+    end
+  end
+end

app/lib/shunter/integration/throttle.rb

@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'active_support/concern'
+
+module Shunter
+  module Integration
+    module Throttle
+      extend ActiveSupport::Concern
+
+      included do |base|
+        actions = base.const_defined?('THROTTLED_ACTIONS') && base.const_get('THROTTLED_ACTIONS')
+        return if actions.blank?
+
+        around_action :throttle, only: actions
+
+        def throttle
+          if throttled_user.blank? || !Shunter.feature_enabled?
+            yield if block_given?
+            return
+          end
+
+          user_id = throttled_user.id
+
+          shunter = Shunter::Base.new(conn_options: connection_options, user_id: user_id)
+          if shunter.throttle
+            logger.info "Request from #{throttled_user.class}/#{throttled_user.id} is coming through throttling"
+            yield if block_given?
+          else
+            logger.info "Too many requests from #{throttled_user.class}/#{throttled_user.id}."
+            raise Shunter::ThrottleError
+          end
+        end
+      end
+
+      def connection_options
+        Shunter::BASE_CONNECTION
+      end
+
+      def logger
+        Shunter::BASE_LOGGER
+      end
+    end
+  end
+end

app/models/epp/domain.rb

@@ -105,6 +105,9 @@ class Epp::Domain < Domain
            max: Setting.ns_max_count
          }
         ],
+        '2502' => [ # Rate limit exceeded
+          %i[base session_limit_exceeded],
+        ],
       ]
     }
   end

app/models/epp/response/result/code.rb

@@ -62,7 +62,7 @@ module Epp
           2308 => 'Data management policy violation',
           2400 => 'Command failed',
           2501 => 'Authentication error; server closing connection',
-          2502 => 'Session limit exceeded; server closing connection',
+          2502 => Shunter.default_error_message,
         }.freeze
         private_constant :DEFAULT_DESCRIPTIONS
 

config/application.yml.sample

@@ -197,6 +197,10 @@ test:
   cdns_scanner_output_file: 'test/fixtures/files/cdns_output.txt'
   dnssec_resolver_ips: 8.8.8.8, 8.8.4.4
   legal_documents_dir: 'test/fixtures/files'
+  shunter_default_adapter: "Shunter::Adapters::Memory"
+  shunter_enabled: "false"
+  shunter_redis_host: "redis"
+  shunter_redis_port: "6379"
 
   openssl_config_path: 'test/fixtures/files/test_ca/openssl.cnf'
   crl_dir: 'test/fixtures/files/test_ca/crl'

config/environments/test.rb

@@ -41,4 +41,6 @@ Rails.application.configure do
 
   # If set to :null_store, Setting.x returns nil after first spec runs (database is emptied)
   config.cache_store = :memory_store
+
+  config.log_level = :fatal
 end

test/integration/api/domain_admin_contacts_test.rb

@@ -10,6 +10,8 @@ class APIDomainAdminContactsTest < ApplicationIntegrationTest
     @admin_new.update(ident: @admin_current.ident,
                       ident_type: @admin_current.ident_type,
                       ident_country_code: @admin_current.ident_country_code)
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_replace_all_admin_contacts_when_ident_data_doesnt_match
@@ -148,6 +150,27 @@ class APIDomainAdminContactsTest < ApplicationIntegrationTest
             JSON.parse(response.body, symbolize_names: true)
   end
 
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    domain = domains(:airport)
+    domain.admin_contacts = [@admin_current]
+    patch '/repp/v1/domains/admin_contacts', params: { current_contact_id: @admin_current.code,
+                                                       new_contact_id: @admin_new.code },
+                                             headers: { 'HTTP_AUTHORIZATION' => http_auth_key }
+    patch '/repp/v1/domains/admin_contacts', params: { current_contact_id: @admin_current.code,
+                                                       new_contact_id: @admin_new.code },
+                                             headers: { 'HTTP_AUTHORIZATION' => http_auth_key }
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def http_auth_key

test/integration/epp/contact/check/base_test.rb

@@ -3,6 +3,9 @@ require 'test_helper'
 class EppContactCheckBaseTest < EppTestCase
   setup do
     @contact = contacts(:john)
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_valid_response
@@ -157,6 +160,59 @@ class EppContactCheckBaseTest < EppTestCase
     # assert_equal 'in use', response_xml.at_xpath('//contact:reason', contact: xml_schema).text
   end
 
+  def test_returns_valid_response_if_not_throttled
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <check>
+            <contact:check xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:id>john-001</contact:id>
+            </contact:check>
+          </check>
+        </command>
+      </epp>
+    XML
+
+    post epp_check_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <check>
+            <contact:check xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:id>john-001</contact:id>
+            </contact:check>
+          </check>
+        </command>
+      </epp>
+    XML
+
+    post epp_check_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_check_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def xml_schema

test/integration/epp/contact/create/base_test.rb

@@ -1,6 +1,11 @@
 require 'test_helper'
 
 class EppContactCreateBaseTest < EppTestCase
+  setup do
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
+  end
+
   def test_creates_new_contact_with_required_attributes
     name = 'new'
     email = 'new@registrar.test'
@@ -362,4 +367,82 @@ class EppContactCreateBaseTest < EppTestCase
     assert_equal country_code, contact.country_code
     assert_equal state, contact.state
   end
+
+  def test_returns_valid_response_if_not_throttled
+    name = 'new'
+    email = 'new@registrar.test'
+    phone = '+1.2'
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <create>
+            <contact:create xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:postalInfo>
+                <contact:name>#{name}</contact:name>
+              </contact:postalInfo>
+              <contact:voice>#{phone}</contact:voice>
+              <contact:email>#{email}</contact:email>
+            </contact:create>
+          </create>
+          <extension>
+            <eis:extdata xmlns:eis="#{Xsd::Schema.filename(for_prefix: 'eis', for_version: '1.0')}">
+              <eis:ident type="priv" cc="US">any</eis:ident>
+            </eis:extdata>
+          </extension>
+        </command>
+      </epp>
+    XML
+
+    post epp_create_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+    name = 'new'
+    email = 'new@registrar.test'
+    phone = '+1.2'
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <create>
+            <contact:create xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:postalInfo>
+                <contact:name>#{name}</contact:name>
+              </contact:postalInfo>
+              <contact:voice>#{phone}</contact:voice>
+              <contact:email>#{email}</contact:email>
+            </contact:create>
+          </create>
+          <extension>
+            <eis:extdata xmlns:eis="#{Xsd::Schema.filename(for_prefix: 'eis', for_version: '1.0')}">
+              <eis:ident type="priv" cc="US">any</eis:ident>
+            </eis:extdata>
+          </extension>
+        </command>
+      </epp>
+    XML
+
+    post epp_create_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_create_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/epp/contact/info/base_test.rb

@@ -3,6 +3,9 @@ require 'test_helper'
 class EppContactInfoBaseTest < EppTestCase
   setup do
     @contact = contacts(:john)
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_valid_response
@@ -129,6 +132,62 @@ class EppContactInfoBaseTest < EppTestCase
     assert_equal 'No access', response_xml.at_xpath('//contact:name', contact: xml_schema).text
   end
 
+  def test_returns_valid_response_if_not_throttled
+    @contact.update_columns(code: @contact.code.upcase)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <info>
+            <contact:info xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:id>john-001</contact:id>
+            </contact:info>
+          </info>
+        </command>
+      </epp>
+    XML
+
+    post epp_info_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+    @contact.update_columns(code: @contact.code.upcase)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <info>
+            <contact:info xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:id>john-001</contact:id>
+            </contact:info>
+          </info>
+        </command>
+      </epp>
+    XML
+
+    post epp_info_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_info_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def xml_schema

test/integration/epp/contact/update/base_test.rb

@@ -6,6 +6,9 @@ class EppContactUpdateBaseTest < EppTestCase
   setup do
     @contact = contacts(:john)
     ActionMailer::Base.deliveries.clear
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_updates_contact
@@ -470,6 +473,76 @@ class EppContactUpdateBaseTest < EppTestCase
     assert_equal '+123.4', @contact.phone
   end
 
+  def test_returns_valid_response_if_not_throttled
+    @contact.update_columns(code: @contact.code.upcase)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <update>
+            <contact:update xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:id>john-001</contact:id>
+              <contact:chg>
+                <contact:postalInfo>
+                  <contact:name>new name</contact:name>
+                </contact:postalInfo>
+                <contact:voice>+123.4</contact:voice>
+                <contact:email>new-email@inbox.test</contact:email>
+              </contact:chg>
+            </contact:update>
+          </update>
+        </command>
+      </epp>
+    XML
+
+    post epp_update_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+    @contact.update_columns(code: @contact.code.upcase)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <update>
+            <contact:update xmlns:contact="#{Xsd::Schema.filename(for_prefix: 'contact-ee', for_version: '1.1')}">
+              <contact:id>john-001</contact:id>
+              <contact:chg>
+                <contact:postalInfo>
+                  <contact:name>new name</contact:name>
+                </contact:postalInfo>
+                <contact:voice>+123.4</contact:voice>
+                <contact:email>new-email@inbox.test</contact:email>
+              </contact:chg>
+            </contact:update>
+          </update>
+        </command>
+      </epp>
+    XML
+
+    post epp_update_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_update_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def make_contact_free_of_domains_where_it_acts_as_a_registrant(contact)

test/integration/epp/domain/check/base_test.rb

@@ -1,6 +1,11 @@
 require 'test_helper'
 
 class EppDomainCheckBaseTest < EppTestCase
+  setup do
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
+  end
+
   def test_returns_valid_response
     request_xml = <<-XML
       <?xml version="1.0" encoding="UTF-8" standalone="no"?>
@@ -193,4 +198,56 @@ class EppDomainCheckBaseTest < EppTestCase
     assert_correct_against_schema response_xml
     assert_equal 3, response_xml.xpath('//domain:cd', 'domain' => "#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}").size
   end
+
+  def test_returns_valid_response_if_not_throttled
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <check>
+            <domain:check xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>some.test</domain:name>
+            </domain:check>
+          </check>
+        </command>
+      </epp>
+    XML
+
+    post epp_check_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <check>
+            <domain:check xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>some.test</domain:name>
+            </domain:check>
+          </check>
+        </command>
+      </epp>
+    XML
+
+    post epp_check_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_check_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/epp/domain/create/base_test.rb

@@ -1,6 +1,10 @@
 require 'test_helper'
 
 class EppDomainCreateBaseTest < EppTestCase
+  setup do
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
+  end
 
   def test_illegal_chars_in_dns_key
     name = "new.#{dns_zones(:one).origin}"
@@ -852,4 +856,85 @@ class EppDomainCreateBaseTest < EppTestCase
     assert_correct_against_schema response_xml
     assert_epp_response :completed_successfully
   end
+
+  def test_returns_valid_response_if_not_throttled
+    now = Time.zone.parse('2010-07-05')
+    travel_to now
+    disputed_domain = disputes(:active)
+    password = disputed_domain.password
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <create>
+            <domain:create xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>#{disputed_domain.domain_name}</domain:name>
+              <domain:registrant>#{contacts(:john).code}</domain:registrant>
+            </domain:create>
+          </create>
+          <extension>
+            <eis:extdata xmlns:eis="#{Xsd::Schema.filename(for_prefix: 'eis', for_version: '1.0')}">
+              <eis:legalDocument type="pdf">#{'test' * 2000}</eis:legalDocument>
+              <eis:reserved>
+                <eis:pw>#{password}</eis:pw>
+              </eis:reserved>
+            </eis:extdata>
+          </extension>
+        </command>
+      </epp>
+    XML
+
+    post epp_create_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    now = Time.zone.parse('2010-07-05')
+    travel_to now
+    disputed_domain = disputes(:active)
+    password = disputed_domain.password
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <create>
+            <domain:create xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>#{disputed_domain.domain_name}</domain:name>
+              <domain:registrant>#{contacts(:john).code}</domain:registrant>
+            </domain:create>
+          </create>
+          <extension>
+            <eis:extdata xmlns:eis="#{Xsd::Schema.filename(for_prefix: 'eis', for_version: '1.0')}">
+              <eis:legalDocument type="pdf">#{'test' * 2000}</eis:legalDocument>
+              <eis:reserved>
+                <eis:pw>#{password}</eis:pw>
+              </eis:reserved>
+            </eis:extdata>
+          </extension>
+        </command>
+      </epp>
+    XML
+
+    post epp_create_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_create_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/epp/domain/info/base_test.rb

@@ -1,6 +1,11 @@
 require 'test_helper'
 
 class EppDomainInfoBaseTest < EppTestCase
+  setup do
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
+  end
+
   def test_returns_valid_response
     assert_equal 'john-001', contacts(:john).code
     domains(:shop).update_columns(statuses: [DomainStatus::OK],
@@ -180,6 +185,63 @@ class EppDomainInfoBaseTest < EppTestCase
     assert_correct_against_schema response_xml
   end
 
+  def test_returns_valid_response_if_not_throttled
+    domain = domains(:shop)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee')}">
+        <command>
+          <info>
+            <domain:info xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>#{domain.name}</domain:name>
+            </domain:info>
+          </info>
+        </command>
+      </epp>
+    XML
+
+    post epp_info_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+    domain = domains(:shop)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee')}">
+        <command>
+          <info>
+            <domain:info xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee')}">
+              <domain:name>#{domain.name}</domain:name>
+            </domain:info>
+          </info>
+        </command>
+      </epp>
+    XML
+
+    post epp_info_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_info_path, params: { frame: request_xml },
+         headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    # binding.pry
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   def test_returns_valid_response_if_release_prohibited
     domain = domains(:shop)
     domain.update_columns(statuses: [DomainStatus::SERVER_RELEASE_PROHIBITED],

test/integration/epp/domain/update/base_test.rb

@@ -10,6 +10,9 @@ class EppDomainUpdateBaseTest < EppTestCase
     @original_registrant_change_verification =
     Setting.request_confirmation_on_registrant_change_enabled
     ActionMailer::Base.deliveries.clear
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   teardown do
@@ -882,6 +885,88 @@ class EppDomainUpdateBaseTest < EppTestCase
     assert_epp_response :object_does_not_exist
   end
 
+  def test_returns_valid_response_if_not_throttled
+    ENV['obj_and_extensions_prohibited'] = 'true'
+    @domain = domains(:shop)
+    @domain.statuses << DomainStatus::SERVER_EXTENSION_UPDATE_PROHIBITED
+    @domain.save
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <update>
+            <domain:update xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>shop.test</domain:name>
+              <domain:rem>
+              <domain:ns>
+                <domain:hostAttr>
+                  <domain:hostName>#{nameservers(:shop_ns1).hostname}</domain:hostName>
+                </domain:hostAttr>
+                <domain:hostAttr>
+                  <domain:hostName>#{nameservers(:shop_ns2).hostname}</domain:hostName>
+                </domain:hostAttr>
+              </domain:ns>
+            </domain:rem>
+            </domain:update>
+          </update>
+        </command>
+      </epp>
+    XML
+
+    post epp_update_path, params: { frame: request_xml },
+                          headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+    ENV['obj_and_extensions_prohibited'] = 'true'
+    @domain = domains(:shop)
+    @domain.statuses << DomainStatus::SERVER_EXTENSION_UPDATE_PROHIBITED
+    @domain.save
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <update>
+            <domain:update xmlns:domain="#{Xsd::Schema.filename(for_prefix: 'domain-ee', for_version: '1.2')}">
+              <domain:name>shop.test</domain:name>
+              <domain:rem>
+              <domain:ns>
+                <domain:hostAttr>
+                  <domain:hostName>#{nameservers(:shop_ns1).hostname}</domain:hostName>
+                </domain:hostAttr>
+                <domain:hostAttr>
+                  <domain:hostName>#{nameservers(:shop_ns2).hostname}</domain:hostName>
+                </domain:hostAttr>
+              </domain:ns>
+            </domain:rem>
+            </domain:update>
+          </update>
+        </command>
+      </epp>
+    XML
+
+    post epp_update_path, params: { frame: request_xml },
+                          headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_update_path, params: { frame: request_xml },
+                          headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def assert_verification_and_notification_emails

test/integration/epp/poll_test.rb

@@ -2,6 +2,8 @@ require 'test_helper'
 
 class EppPollTest < EppTestCase
   setup do
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
     @notification = notifications(:complete)
   end
 
@@ -149,6 +151,44 @@ class EppPollTest < EppTestCase
     assert_epp_response :authorization_error
   end
 
+  def test_returns_valid_response_if_not_throttled
+    notification = notifications(:greeting)
+
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="#{Xsd::Schema.filename(for_prefix: 'epp-ee', for_version: '1.0')}">
+        <command>
+          <poll op="ack" msgID="#{notification.id}"/>
+        </command>
+      </epp>
+    XML
+
+    post epp_poll_path, params: { frame: request_xml },
+                        headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :completed_successfully
+    assert_correct_against_schema response_xml
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    post epp_poll_path, params: { frame: request_req_xml },
+                        headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    post epp_poll_path, params: { frame: request_req_xml },
+                        headers: { 'HTTP_COOKIE' => 'session=api_bestnames' }
+
+    response_xml = Nokogiri::XML(response.body)
+    assert_epp_response :session_limit_exceeded_server_closing_connection
+    assert_correct_against_schema response_xml
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def request_req_xml

test/integration/repp/v1/accounts/activities_list_test.rb

@@ -7,6 +7,9 @@ class ReppV1AccountsActivitiesListTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_account_activities
@@ -67,4 +70,19 @@ class ReppV1AccountsActivitiesListTest < ActionDispatch::IntegrationTest
     assert_equal @user.registrar.cash_account.activities.count, json[:data][:activities].length
     assert_equal json[:data][:activities][0][:description], activity.description
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get repp_v1_accounts_path, headers: @auth_headers
+    get repp_v1_accounts_path, headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/accounts/balance_test.rb

@@ -8,6 +8,9 @@ class ReppV1BalanceTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
 
@@ -49,5 +52,20 @@ class ReppV1BalanceTest < ActionDispatch::IntegrationTest
       assert trans[:created_at].to_date.to_s(:db) >= started_from
       assert trans[:created_at].to_date.to_s(:db) >= end_to
     end
+
+    def test_returns_error_response_if_throttled
+      ENV["shunter_default_threshold"] = '1'
+      ENV["shunter_enabled"] = 'true'
+
+      get '/repp/v1/accounts/balance', headers: @auth_headers
+      get '/repp/v1/accounts/balance', headers: @auth_headers
+      json = JSON.parse(response.body, symbolize_names: true)
+
+      assert_response :bad_request
+      assert_equal json[:code], 2502
+      assert response.body.include?(Shunter.default_error_message)
+      ENV["shunter_default_threshold"] = '10000'
+      ENV["shunter_enabled"] = 'false'
+    end
   end
 end

test/integration/repp/v1/accounts/details_test.rb

@@ -7,6 +7,9 @@ class ReppV1AccountsDetailsTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_account_details
@@ -19,4 +22,19 @@ class ReppV1AccountsDetailsTest < ActionDispatch::IntegrationTest
 
     assert_equal @user.registrar.billing_email, json[:data][:account][:billing_email]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get '/repp/v1/accounts/details', headers: @auth_headers
+    get '/repp/v1/accounts/details', headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/accounts/switch_user_test.rb

@@ -7,6 +7,9 @@ class ReppV1AccountsSwitchUserTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_switches_to_linked_api_user
@@ -48,4 +51,27 @@ class ReppV1AccountsSwitchUserTest < ActionDispatch::IntegrationTest
     assert_response :bad_request
     assert_equal 'Cannot switch to unlinked user', json[:message]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    new_user = users(:api_goodnames)
+    new_user.update(identity_code: '1234')
+    request_body = {
+      account: {
+        new_user_id: new_user.id,
+      },
+    }
+
+    put '/repp/v1/accounts/switch_user', headers: @auth_headers, params: request_body
+    put '/repp/v1/accounts/switch_user', headers: @auth_headers, params: request_body
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/accounts/update_auto_reload_balance_test.rb

@@ -7,6 +7,9 @@ class ReppV1AccountsUpdateAutoReloadBalanceTest < ActionDispatch::IntegrationTes
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_updates_auto_reload_balance
@@ -66,4 +69,45 @@ class ReppV1AccountsUpdateAutoReloadBalanceTest < ActionDispatch::IntegrationTes
 
     assert_nil @user.registrar.settings['balance_auto_reload']
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    amount = 100
+    threshold = 10
+    request_body = {
+      type: {
+        amount: amount,
+        threshold: threshold,
+      },
+    }
+
+    post '/repp/v1/accounts/update_auto_reload_balance', headers: @auth_headers,
+                                                        params: request_body
+    post '/repp/v1/accounts/update_auto_reload_balance', headers: @auth_headers,
+                                                        params: request_body
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get '/repp/v1/accounts/disable_auto_reload_balance', headers: @auth_headers
+    get '/repp/v1/accounts/disable_auto_reload_balance', headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/accounts/update_details_test.rb

@@ -7,6 +7,9 @@ class ReppV1AccountsUpdateDetailsTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_updates_details
@@ -27,4 +30,26 @@ class ReppV1AccountsUpdateDetailsTest < ActionDispatch::IntegrationTest
     assert_equal(request_body[:account][:billing_email], @user.registrar.billing_email)
     assert_equal(request_body[:account][:iban], @user.registrar.iban)
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    request_body =  {
+      account: {
+        billing_email: 'donaldtrump@yandex.ru',
+        iban: 'GB331111111111111111',
+      },
+    }
+
+    put '/repp/v1/accounts', headers: @auth_headers, params: request_body
+    put '/repp/v1/accounts', headers: @auth_headers, params: request_body
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/check_test.rb

@@ -7,6 +7,9 @@ class ReppV1ContactsCheckTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_code_based_check_returns_true_for_available_contact
@@ -27,4 +30,20 @@ class ReppV1ContactsCheckTest < ActionDispatch::IntegrationTest
     assert_equal contact.code, json[:data][:contact][:code]
     assert_equal false, json[:data][:contact][:available]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    contact = contacts(:jack)
+    get "/repp/v1/contacts/check/#{contact.code}", headers: @auth_headers
+    get "/repp/v1/contacts/check/#{contact.code}", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/create_test.rb

@@ -7,6 +7,9 @@ class ReppV1ContactsCreateTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_creates_new_contact
@@ -153,4 +156,32 @@ class ReppV1ContactsCreateTest < ActionDispatch::IntegrationTest
     contact = Contact.find_by(code: json[:data][:contact][:code])
     assert contact.legal_documents.any?
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    request_body =  {
+      contact: {
+        name: 'Donald Trump',
+        phone: '+372.51111112',
+        email: 'donald@trumptower.com',
+        ident: {
+          ident_type: 'priv',
+          ident_country_code: 'EE',
+          ident: '39708290069',
+        },
+      },
+    }
+
+    post '/repp/v1/contacts', headers: @auth_headers, params: request_body
+    post '/repp/v1/contacts', headers: @auth_headers, params: request_body
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/delete_test.rb

@@ -7,6 +7,9 @@ class ReppV1ContactsDeleteTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_deletes_unassociated_contact
@@ -44,4 +47,19 @@ class ReppV1ContactsDeleteTest < ActionDispatch::IntegrationTest
 
     assert_response :not_found
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    delete "/repp/v1/contacts/#{contacts(:invalid_email).code}", headers: @auth_headers
+    delete "/repp/v1/contacts/#{contacts(:john).code}", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/list_test.rb

@@ -7,6 +7,9 @@ class ReppV1ContactsListTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_registrar_contacts
@@ -79,4 +82,19 @@ class ReppV1ContactsListTest < ActionDispatch::IntegrationTest
     assert_equal @user.registrar.contacts.count, json[:data][:contacts].length
     assert_equal json[:data][:contacts][0][:code], contact.code
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get repp_v1_contacts_path, headers: @auth_headers
+    get repp_v1_contacts_path, headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/search_test.rb

@@ -7,6 +7,9 @@ class ReppV1ContactsSearchTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_searches_all_contacts_by_id
@@ -40,4 +43,18 @@ class ReppV1ContactsSearchTest < ActionDispatch::IntegrationTest
     assert json[:data].is_a? Array
     assert_equal json[:data].length, 0
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get '/repp/v1/contacts/search', headers: @auth_headers, params: { query: '000' }
+
+    assert_raise Shunter::ThrottleError do
+      get '/repp/v1/contacts/search', headers: @auth_headers, params: { query: '000' }
+    end
+
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/show_test.rb

@@ -7,6 +7,9 @@ class ReppV1ContactsShowTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_error_when_not_found
@@ -42,4 +45,21 @@ class ReppV1ContactsShowTest < ActionDispatch::IntegrationTest
     assert_equal 2303, json[:code]
     assert_equal 'Object does not exist', json[:message]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    contact = @user.registrar.contacts.first
+
+    get repp_v1_contact_path(id: contact.code), headers: @auth_headers
+    get repp_v1_contact_path(id: contact.code), headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/contacts/update_test.rb

@@ -8,6 +8,9 @@ class ReppV1ContactsUpdateTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_updates_contact
@@ -118,4 +121,25 @@ class ReppV1ContactsUpdateTest < ActionDispatch::IntegrationTest
     assert_equal 2308, json[:code]
     assert_equal 'Ident update is not allowed. Consider creating new contact object', json[:message]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    request_body =  {
+      "contact": {
+        "email": "donaldtrump@yandex.ru"
+      }
+    }
+
+    put "/repp/v1/contacts/#{@contact.code}", headers: @auth_headers, params: request_body
+    put "/repp/v1/contacts/#{@contact.code}", headers: @auth_headers, params: request_body
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/domains/bulk_renew_test.rb

@@ -8,6 +8,9 @@ class ReppV1DomainsBulkRenewTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_renews_domains
@@ -129,6 +132,30 @@ class ReppV1DomainsBulkRenewTest < ActionDispatch::IntegrationTest
     assert_equal 'Invalid renew period', json[:message]
   end
 
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    payload = {
+      "domains": [
+        'shop.test',
+        'airport.test',
+        'library.test'
+      ],
+      "renew_period": "1y"
+    }
+
+    post "/repp/v1/domains/renew/bulk", headers: @auth_headers, params: payload
+    post "/repp/v1/domains/renew/bulk", headers: @auth_headers, params: payload
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   private
 
   def set_status_for_domain(domain, statuses)

test/integration/repp/v1/domains/contacts_test.rb

@@ -8,6 +8,9 @@ class ReppV1DomainsContactsTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_shows_existing_domain_contacts
@@ -22,6 +25,21 @@ class ReppV1DomainsContactsTest < ActionDispatch::IntegrationTest
     assert_equal @domain.tech_contacts.length, json[:data][:tech_contacts].length
   end
 
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get "/repp/v1/domains/#{@domain.name}/contacts", headers: @auth_headers
+    get "/repp/v1/domains/#{@domain.name}/contacts", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   def test_can_add_new_admin_contacts
     new_contact = contacts(:john)
     refute  @domain.admin_contacts.find_by(code: new_contact.code).present?

test/integration/repp/v1/domains/dnssec_test.rb

@@ -8,6 +8,9 @@ class ReppV1DomainsDnssecTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_shows_dnssec_keys_associated_with_domain
@@ -120,4 +123,19 @@ class ReppV1DomainsDnssecTest < ActionDispatch::IntegrationTest
 
     assert @domain.dnskeys.empty?
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get "/repp/v1/domains/#{@domain.name}/dnssec", headers: @auth_headers
+    get "/repp/v1/domains/#{@domain.name}/dnssec", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/domains/list_test.rb

@@ -7,6 +7,9 @@ class ReppV1DomainsListTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_registrar_domains
@@ -92,4 +95,19 @@ class ReppV1DomainsListTest < ActionDispatch::IntegrationTest
     assert_equal @user.registrar.domains.count, json[:data][:domains].length
     assert_equal json[:data][:domains][0][:name], domain.name
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get repp_v1_domains_path, headers: @auth_headers
+    get repp_v1_domains_path, headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/domains/nameservers_test.rb

@@ -8,6 +8,9 @@ class ReppV1DomainsNameserversTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_can_add_new_nameserver
@@ -30,6 +33,21 @@ class ReppV1DomainsNameserversTest < ActionDispatch::IntegrationTest
     assert_equal payload[:nameservers][0][:ipv6], @domain.nameservers.last.ipv6
   end
 
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get "/repp/v1/domains/#{@domain.name}/nameservers", headers: @auth_headers
+    get "/repp/v1/domains/#{@domain.name}/nameservers", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   def test_can_remove_existing_nameserver
     payload = {
       nameservers: [

test/integration/repp/v1/domains/statuses_test.rb

@@ -8,6 +8,9 @@ class ReppV1DomainsStatusesTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_client_hold_can_be_added
@@ -79,4 +82,18 @@ class ReppV1DomainsStatusesTest < ActionDispatch::IntegrationTest
     assert_equal 2306, json[:code]
   end
 
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    put repp_v1_domain_status_path(domain_id: @domain.name, id: DomainStatus::CLIENT_HOLD), headers: @auth_headers
+    put repp_v1_domain_status_path(domain_id: @domain.name, id: DomainStatus::CLIENT_HOLD), headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/domains/transfer_info_test.rb

@@ -7,6 +7,9 @@ class ReppV1DomainsTransferInfoTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
     @domain = domains(:shop)
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_can_query_domain_info
@@ -51,4 +54,22 @@ class ReppV1DomainsTransferInfoTest < ActionDispatch::IntegrationTest
     assert_response :ok
     assert_equal 1000, json[:code]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    headers = @auth_headers
+    headers['Auth-Code'] = @domain.transfer_code
+
+    get "/repp/v1/domains/#{@domain.name}/transfer_info", headers: headers
+    get "/repp/v1/domains/#{@domain.name}/transfer_info", headers: headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/domains/transfer_test.rb

@@ -8,6 +8,9 @@ class ReppV1DomainsTransferTest < ActionDispatch::IntegrationTest
     @domain = domains(:hospital)
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_transfers_scoped_domain
@@ -152,4 +155,20 @@ class ReppV1DomainsTransferTest < ActionDispatch::IntegrationTest
 
     assert_not @domain.registrar == @user.registrar
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    payload = { transfer: { transfer_code: @domain.transfer_code } }
+    post "/repp/v1/domains/#{@domain.name}/transfer", headers: @auth_headers, params: payload
+    post "/repp/v1/domains/#{@domain.name}/transfer", headers: @auth_headers, params: payload
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/invoices/add_credit_test.rb

@@ -24,6 +24,8 @@ class ReppV1InvoicesAddCreditTest < ActionDispatch::IntegrationTest
       message: 'success'
     }
     stub_request(:post, "https://eis_billing_system:3000/api/v1/e_invoice/e_invoice").to_return(status: 200, body: msg2.to_json, headers: {})
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   teardown do
@@ -101,4 +103,39 @@ class ReppV1InvoicesAddCreditTest < ActionDispatch::IntegrationTest
     assert_response :bad_request
     assert_equal "Amount is too small. Minimum deposit is #{Setting.minimum_deposit} EUR", json[:message]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    request_body = {
+      invoice: {
+        amount: 100,
+        description: 'Add credit',
+      },
+    }
+    Setting.registry_vat_prc = 0.1
+    ENV['billing_system_integrated'] = 'true'
+
+    if Feature.billing_system_integrated?
+      invoice_n = Invoice.order(number: :desc).last.number
+      stub_request(:post, 'https://eis_billing_system:3000/api/v1/invoice_generator/invoice_number_generator')
+        .to_return(status: 200, body: "{\"invoice_number\":\"#{invoice_n + 3}\"}", headers: {})
+      stub_request(:post, 'https://eis_billing_system:3000/api/v1/e_invoice/e_invoice')
+        .to_return(status: 200, body: '', headers: {})
+    end
+
+    post '/repp/v1/invoices/add_credit', headers: @auth_headers,
+                                         params: request_body
+    post '/repp/v1/invoices/add_credit', headers: @auth_headers,
+                                         params: request_body
+
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/invoices/download_test.rb

@@ -7,6 +7,9 @@ class ReppV1InvoicesDownloadTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_invoice_as_pdf
@@ -19,4 +22,21 @@ class ReppV1InvoicesDownloadTest < ActionDispatch::IntegrationTest
     assert_equal "attachment; filename=\"Invoice-2.pdf\"; filename*=UTF-8''Invoice-2.pdf", response.headers['Content-Disposition']
     assert_not_empty response.body
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    invoice = @user.registrar.invoices.first
+
+    get "/repp/v1/invoices/#{invoice.id}/download", headers: @auth_headers
+    get "/repp/v1/invoices/#{invoice.id}/download", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/invoices/list_test.rb

@@ -7,6 +7,9 @@ class ReppV1InvoicesListTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_registrar_invoices
@@ -82,4 +85,19 @@ class ReppV1InvoicesListTest < ActionDispatch::IntegrationTest
 
     assert_equal (@user.registrar.invoices.count - offset), json[:data][:invoices].length
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get repp_v1_invoices_path, headers: @auth_headers
+    get repp_v1_invoices_path, headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/invoices/send_test.rb

@@ -7,6 +7,9 @@ class ReppV1InvoicesSendTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_sends_invoice_to_recipient
@@ -36,4 +39,30 @@ class ReppV1InvoicesSendTest < ActionDispatch::IntegrationTest
     assert_equal 'Invoice no. 1', email.subject
     assert email.attachments['invoice-1.pdf']
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    invoice = invoices(:one)
+    recipient = 'donaldtrump@yandex.ru'
+    request_body = {
+      invoice: {
+        id: invoice.id,
+        recipient: recipient,
+      },
+    }
+    post "/repp/v1/invoices/#{invoice.id}/send_to_recipient", headers: @auth_headers,
+                                                              params: request_body
+    post "/repp/v1/invoices/#{invoice.id}/send_to_recipient", headers: @auth_headers,
+                                                              params: request_body
+
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/invoices/show_test.rb

@@ -7,6 +7,9 @@ class ReppV1InvoicesShowTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_error_when_not_found
@@ -30,4 +33,21 @@ class ReppV1InvoicesShowTest < ActionDispatch::IntegrationTest
 
     assert_equal invoice.id, json[:data][:invoice][:id]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    invoice = @user.registrar.invoices.first
+
+    get repp_v1_invoice_path(id: invoice.id), headers: @auth_headers
+    get repp_v1_invoice_path(id: invoice.id), headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/registrar/auth/check_info_test.rb

@@ -7,6 +7,9 @@ class ReppV1RegistrarAuthCheckInfoTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_returns_valid_user_auth_values
@@ -35,4 +38,19 @@ class ReppV1RegistrarAuthCheckInfoTest < ActionDispatch::IntegrationTest
     assert_response :unauthorized
     assert_equal json[:message], 'Invalid authorization information'
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get '/repp/v1/registrar/auth', headers: @auth_headers
+    get '/repp/v1/registrar/auth', headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/integration/repp/v1/registrar/notifications_test.rb

@@ -7,6 +7,9 @@ class ReppV1RegistrarNotificationsTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_all_unreaded_poll_messages
@@ -20,6 +23,22 @@ class ReppV1RegistrarNotificationsTest < ActionDispatch::IntegrationTest
     assert_equal json[:data].last[:text], notification.last.text
   end
 
+  def test_all_notifications_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    notification = @user.registrar.notifications.where(read: false).order(created_at: :desc).all
+    get "/repp/v1/registrar/notifications/all_notifications", headers: @auth_headers
+    get "/repp/v1/registrar/notifications/all_notifications", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   def test_gets_latest_unread_poll_message
     notification = @user.registrar.notifications.where(read: false).order(created_at: :desc).first
     get "/repp/v1/registrar/notifications", headers: @auth_headers
@@ -31,6 +50,22 @@ class ReppV1RegistrarNotificationsTest < ActionDispatch::IntegrationTest
     assert_equal notification.text, json[:data][:text]
   end
 
+  def test_index_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    notification = @user.registrar.notifications.where(read: false).order(created_at: :desc).first
+    get "/repp/v1/registrar/notifications", headers: @auth_headers
+    get "/repp/v1/registrar/notifications", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   def test_can_read_specific_notification_by_id
     notification = @user.registrar.notifications.order(created_at: :desc).second
 
@@ -43,6 +78,23 @@ class ReppV1RegistrarNotificationsTest < ActionDispatch::IntegrationTest
     assert_equal notification.text, json[:data][:text]
   end
 
+  def test_show_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    notification = @user.registrar.notifications.order(created_at: :desc).second
+
+    get "/repp/v1/registrar/notifications/#{notification.id}", headers: @auth_headers
+    get "/repp/v1/registrar/notifications/#{notification.id}", headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
+
   def test_can_mark_notification_as_read
     @auth_headers['Content-Type'] = 'application/json'
     notification = @user.registrar.notifications.where(read: false).order(created_at: :desc).first

test/integration/repp/v1/registrar/summary_test.rb

@@ -7,6 +7,9 @@ class ReppV1RegistrarSummaryTest < ActionDispatch::IntegrationTest
     token = "Basic #{token}"
 
     @auth_headers = { 'Authorization' => token }
+
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter&.clear!
   end
 
   def test_checks_user_summary_info
@@ -40,4 +43,19 @@ class ReppV1RegistrarSummaryTest < ActionDispatch::IntegrationTest
     assert_nil json[:data][:notification]
     assert_nil json[:data][:notifications_count]
   end
+
+  def test_returns_error_response_if_throttled
+    ENV["shunter_default_threshold"] = '1'
+    ENV["shunter_enabled"] = 'true'
+
+    get '/repp/v1/registrar/summary', headers: @auth_headers
+    get '/repp/v1/registrar/summary', headers: @auth_headers
+    json = JSON.parse(response.body, symbolize_names: true)
+
+    assert_response :bad_request
+    assert_equal json[:code], 2502
+    assert response.body.include?(Shunter.default_error_message)
+    ENV["shunter_default_threshold"] = '10000'
+    ENV["shunter_enabled"] = 'false'
+  end
 end

test/lib/shunter/shunter_base_test.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require "test_helper"
+require "action_controller"
+require "pry"
+
+class ShunterBaseTest < Minitest::Test
+  ENV["shunter_enabled"] = 'true'
+
+  def test_throttling_works_on_inclusion
+    ENV["shunter_default_adapter"] = "Shunter::Adapters::Memory"
+    ENV["shunter_default_threshold"] = "100"
+    adapter = ENV["shunter_default_adapter"].constantize.new
+    adapter.clear!
+
+    TestKlass.new.throttle do
+      TestKlass.new.test
+    end
+  end
+
+  class TestKlass < ::ActionController::Base
+    THROTTLED_ACTIONS = %i[test].freeze
+    include Shunter::Integration::Throttle
+
+    def test
+      "test"
+    end
+
+    def throttled_user
+      @throttled_user ||= OpenStruct.new(id: 1)
+    end
+  end
+end

test/models/epp/response/result/code_test.rb

@@ -85,7 +85,7 @@ class EppResponseResultCodeTest < ActiveSupport::TestCase
       2308 => 'Data management policy violation',
       2400 => 'Command failed',
       2501 => 'Authentication error; server closing connection',
-      2502 => 'Session limit exceeded; server closing connection'
+      2502 => Shunter.default_error_message
     }
     assert_equal descriptions, Epp::Response::Result::Code.default_descriptions
   end