const res = await cloud.cloudPay.refund({
        "outTradeNo": outTradeNo,
        "nonce_str": "akwckr3",
        "outRefundNo": refoundNo,
        "subMchId": "1487771202",
        "totalFee": totalFee,
        "refundFee": refundFee,
        "envId": "sensan-7gr36lxe3fe83dd3",
        "functionName": "refundback"
    })
返回结果
result: {returnCode: "FAIL", returnMsg: "特约子商户商户号未授权服务商的产品权限", couponTypeList: [], couponRefundIdList: [],…}
couponRefundFeeList: []
couponRefundIdList: []
couponTypeList: []
errCode: 0
errMsg: "cloudPay.refund:ok"
returnCode: "FAIL"
returnMsg: "特约子商户商户号未授权服务商的产品权限"

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商户号：1487771202

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