Reject incoming QuoteRequest activities (#34480)

app/serializers/activitypub/quote_request_serializer.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class ActivityPub::QuoteRequestSerializer < ActivityPub::Serializer
+  context_extensions :quote_requests
+
+  attributes :id, :type, :actor, :instrument
+  attribute :virtual_object, key: :object
+
+  def id
+    object.activity_uri || [ActivityPub::TagManager.instance.uri_for(object.target_account), '#quote_requests/', object.id].join
+  end
+
+  def type
+    'QuoteRequest'
+  end
+
+  def actor
+    ActivityPub::TagManager.instance.uri_for(object.account)
+  end
+
+  def virtual_object
+    ActivityPub::TagManager.instance.uri_for(object.quoted_status)
+  end
+
+  def instrument
+    ActivityPub::TagManager.instance.uri_for(object.status)
+  end
+end