1 files changed, 22 insertions, 0 deletions
diff --git a/lib/api/integrations/slack/events/url_verification.rb b/lib/api/integrations/slack/events/url_verification.rb
new file mode 100644
index 00000000000..4628b93665d
--- /dev/null
+++ b/lib/api/integrations/slack/events/url_verification.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module API
+  class Integrations
+    module Slack
+      class Events
+        class UrlVerification
+          # When the GitLab Slack app is first configured to receive Slack events,
+          # Slack will issue a special request to the endpoint and expect it to respond
+          # with the `challenge` param.
+          #
+          # This must be done in-request, rather than on a queue.
+          #
+          # See https://api.slack.com/apis/connections/events-api.
+          def self.call(params)
+            { challenge: params[:challenge] }
+          end
+        end
+      end
+    end
+  end
+end