{
    "sub_mchid": "1900008XXX",
    "notify_url": "https://weixin.qq.com/",
    "amount": {
        "total": 1,
        "currency": "CNY",
        "refund": 1,
        "from": [
            {
                "account": "AVAILABLE",
                "amount": 444
            }
        ]
    },
    "transaction_id": "4200000991202103266853086457",
    "out_refund_no": "sdk12345678920210326145039",
    "reason": "商品已售完"
}