Reject incoming QuoteRequest activities (#34480)

app/serializers/activitypub/reject_quote_request_serializer.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class ActivityPub::RejectQuoteRequestSerializer < ActivityPub::Serializer
+  attributes :id, :type, :actor
+
+  has_one :object, serializer: ActivityPub::QuoteRequestSerializer
+
+  def id
+    [ActivityPub::TagManager.instance.uri_for(object.quoted_account), '#rejects/quote_requests/', object.id].join
+  end
+
+  def type
+    'Reject'
+  end
+
+  def actor
+    ActivityPub::TagManager.instance.uri_for(object.quoted_account)
+  end
+end