事件类别：order_refund
order_id[* String]：订单号payment_id[* String]：支付流水号refund_result[* Object RefundResult]：退款结果
refund_amount[* Object Amount]：退款金额
currency[* String]：原始金额货币类型，3 字母编码，符合 ISO 4217 标准amount_local[* Double]：原始金额amount_usd[Double]：金额（美金），将原始金额经过汇率换算后的美金金额，（条件必须：如果接入的是非 CN 站点则必须）amount_cny[Double]：金额（人民币），将原始金额经过汇率换算后的人民币金额，（条件必须：如果接入的是 CN 站点则必须）refund_reason[String]：退款原因{
"order_id": "NX348566DIHD",
"payment_id": "NHF8736274",
"refund_result": {
"refund_amount": {
"currency": "CNY",
"amount_local": 68,
"amount_usd": 10,
"amount_cny": 68
},
"refund_reason": "XXX"
}
}