tt.applyRefund(options);

tt.applyRefund({
      refundInfo:{
          reason: ['理由'], // 退款理由 必填
          note:'不需要', // 备注 非必填
      }
      outOrderNo: 'xxxx', // 外部订单号 必填
      goodsList: [
        {
          goodsId: '123', // 商品ID 必填
          goodsType: 2, // 商品类型 必填
          quantity: 1, // 退款商品数量 必填
        },
      ], // 退款商品列表 新订单全部使用该数组退款 refundGoodsList和refundTotalAmount必填一个

     callbackData:{ test:123 }, // 透传数据 会被 JSON.stringfy 化 非必填
      // refundTotalAmount:1, // 老订单指定金额退款，新订单该参数无效
      success: res => {
        const { orderId, outRefundNo, refundId } = res;
        console.log('申请退款成功');
        console.log('orderId', orderId, 'outRefundNo', outRefundNo, 'refundId', refundId);
      },
      fail: res => {
        const { errNo, errMsg, errLogId } = res;
        console.log('申请失败', errNo, errMsg, errLogId);
      },
    });

tt.applyRefund({
  outOrderNo: orderId,
  refundInfo: {
    reason: ["test"],
  },
  itemOrderList: [
    { itemOrderId: "ot423412", refundAmount: 100 },
    { itemOrderId: "ot423413" },
  ],
  success(res) {
    const { outRefundNo } = res;
    tt.showToast({ title: outRefundNo });
  },
  fail(res) {
    console.log("fail", res);
  },
});

tt.applyRefund({
  refundInfo: {
    reason: ["理由"], // 退款理由 必填
    note: "不需要", // 备注
    reasonCode: [401],
    feeDetailsList: [
      {
        feeType: 1,
        refundAmount: 1,
      },
    ],
  },
  outOrderNo: "xxx", // 外部订单号 必填
  itemOrderList: [
    { itemOrderId: "ot423412", refundAmount: 10 },
    { itemOrderId: "ot423413" },
  ],
  callbackData: { test: 123 }, // 透传数据 会被 JSON.stringfy 化 非必填
  success: (res) => {
    const { orderId, outRefundNo, refundId } = res;
    console.log("申请退款成功");
    console.log(
      "orderId",
      orderId,
      "outRefundNo",
      outRefundNo,
      "refundId",
      refundId
    );
  },
  fail: (res) => {
    const { errNo, errMsg, errLogId } = res;
    console.log("申请失败", errNo, errMsg, errLogId);
  },
});