## 申請退款
#### URL:http://域名/ver1/pay/refund
#### 訪問方式：post
~~~[api]
post:/refund
*merOrderId#商戶訂單號
*refundOrderId#退款單號，由商戶生成，保證唯一性
*amount#退款金額，單位為分
refundReason#退款原因
<<<
success
{
"code":0,
"msg":"success",
"data":{
"refundId":"平臺退款單號"
}
}
<<<
error
{
"code":"錯誤碼",
"msg":"錯誤描述"
}
