Node.js 更新 mongodb 中的交易值

我正在做一个MERN项目，我需要更新Mongo数据库记录中的两个字段.

我有两个字段，一个是名为Wallets的对象数组，另一个是Transaction.

我正在从前端获取一个对象，其中包括金额，作为钱包进行交易的钱包的索引是Mongo中的对象array.

现在我需要从钱包中减go 交易额.如何操作我在node.js中编写了一个控制器，但它什么都不做.

我从前端收到的对象，如果..

transaction = { amount: '50', wallet: 0, type: 'expense', description: 'kmop' };

我的Node.js 控制器是...

module.exports.addTransaction = async (req, res) => {
  const transaction = req.body;
  const {wallet} = transaction;

  try {
      const walletName = `Wallets.${wallet}.amount`
      await UserModel.findOneAndUpdate(
        { email: email },
        {  $inc: { walletName : -transaction.amount}   ,
          $push: { transactions: { $each: [transaction], $position: 0 } } }
      );
      res.send({stat: true});
    } 
    else {
      console.log(data)
      res.send({ stat: false });
    }
  } catch (err) {
    console.log("err",err)
    res.send({ stat: false, err: err.message });
  }
};

我的芒果数据库唱片--

{"_id":{"$oid":"64a5a396ec152ab4f5e1c60c"},
"firstName":"Vinayak",
"lastName":"Pandey",
"email":"abc@123.com",
"password":"$2b$10$dpAmLPa9imDKn3qeyhZ/hOwolO6NOYVwNvVgBc9PY8XZZ3n4WYh/O",
"Wallets":[{"name":"paytm","amount":500},
           {"name":"hdfc","amount":5000},
           {"name":"test","amount":3020}]

Suppose i made a transaction from wallet namde paytm of rs 50 so i want that is the amount in object with name as paytm should be decreased by rs-50 so initially it was rs500 after the process it should became rs450....个