orders.ts

router.get("/orders/:id", (req, res) => {
  const { sourceCode } = req.query;

  try {
    const order = await getOrderById(req.params.id);
    res.status(200).json(order);
  } catch (err) {
    if (axios.isAxiosError(err)) {
      if (err.code === 404 && sourceCode) {
        await refreshOrderSource(sourceCode);
        const order = await getOrderById(req.params.id);
        res.status(200).json(order);
      }

      throw err; // whatever we do with generic errors
    }

    throw err;
  }
});

// in the api lib

const refreshOrderSource = async (sourceCode: string, synchronous: true) => {
  if (synchronous) {
    // logic for polling and waiting for the order source to be refreshed goes here
    // probably calling `refreshOrderSource` recursively with synchronous = false in each loop
    // until it returns from this function when the order is done refreshing
  }

  // logic for initiating the refresh goes here
};