退款响应体

{
    "merNo": "string",
    "charge": "string",
    "tradeNo": "string",
    "orderNo": "string",
    "currency": "str",
    "amount": 1,
    "paymentMethod": "string",
    "refundAmount": 1,
    "refundReason": "string",
    "status": 0,
    "metadata": "string",
    "remark": "string"
}