这个问题解决了嘛，我这今天也出现了

["appid", "cash_fee", "mch_id", "nonce_str", "out_refund_no_0", "out_trade_no", "refund_account_0", "refund_channel_0", "refund_count", "refund_fee", "refund_fee_0", "refund_id_0", "refund_recv_accout_0", "refund_status_0", "refund_success_time_0", "result_code", "return_code", "return_msg", "sign", "total_fee", "transaction_id"]