'sign miss', 'sign_error' => 'sign error', 'appid_miss' => 'appid miss', 'nonce_miss' => 'random string param miss', 'sign_timeout' => 'sign is timeout', 'appid_nofund' => 'appid is not exists', 'appkey_no_allow' => 'appkey no allow', 'sign_used' => 'sign is used', ];