按照要求 传递了 detail

{"goods_detail":[{"goods_id":"bV9whI9YFj","quantity":1,"price":5200}]}

商户后台有如下图配置

调用统一支付代码如下

      const res = await cloud.cloudPay.unifiedOrder({
        body,
        detail: fixDetail,
        outTradeNo,
        "spbillCreateIp": "127.0.0.1",
        "subMchId": process.env.subMchId,
        totalFee: parseInt(totalFee * 100),
        tradeType: 'JSAPI',
        "envId": process.env.envId,
        "functionName": "pay_cb",
        openid,
        // goodsTag: "",
        attach: id,
        version: "1.0"
      })

其中
body 为 string 格式字符

fixDetail 为
const fixDetail = JSON.stringify({"goods_detail":[{"goods_id":"bV9whI9YFj","quantity":1,"price":5200}]})