class Comet::U2FSignRequest

def from_hash(obj)
  raise TypeError, "'obj' expected Hash, got #{obj.class}" unless obj.is_a? Hash
  obj.each do |k, v|
    case k
    when 'ChallengeID'
      raise TypeError, "'v' expected String, got #{v.class}" unless v.is_a? String
      @challenge_id = v
    when 'ChallengeData'
      raise TypeError, "'v' expected String, got #{v.class}" unless v.is_a? String
      @challenge_data = v
    when 'AppID'
      raise TypeError, "'v' expected String, got #{v.class}" unless v.is_a? String
      @app_id = v
    when 'RegisteredKeys'
      if v.nil?
        @registered_keys = []
      else
        @registered_keys = Array.new(v.length)
        v.each_with_index do |v1, i1|
          @registered_keys[i1] = Comet::U2FRegisteredKey.new
          @registered_keys[i1].from_hash(v1)
        end
      end
    else
      @unknown_json_fields[k] = v
    end
  end
end