new

# File actionpack/lib/action_dispatch/middleware/cookies.rb, line 605
      def initialize(parent_jar)
        super

        secret = request.key_generator.generate_key(request.signed_cookie_salt)
        @verifier = ActiveSupport::MessageVerifier.new(secret, digest: signed_cookie_digest, serializer: SERIALIZER)

        request.cookies_rotations.signed.each do |(*secrets)|
          options = secrets.extract_options!
          @verifier.rotate(*secrets, serializer: SERIALIZER, **options)
        end
      end