NextJs api routes, 2 POST requests how to differentiate

Question

I have a question, I am making an app in NextJS and I have a problem. On one page I can buy, sell and delete the asset. How to differentiate buy and sell if both are POST requests in API Route. What to do, should I add some 'type'? Or Is there a better way?

const handler = async (req: NextApiRequest, res: NextApiResponse) => {
  if (req.method === "POST") {
   assetIdForBuy = req.body
  }

  if (req.method === "POST") {
    const assetIdForSell = req.body;
  }
};

export default handler;

Answer 1

well, you can simply add some type check like,

if(req.body.data.type === "delete"){ // or something like that whatever fits.
    assetIdForDelete = req.body
{