I am trying to do addition of the currency prices which i am getting as an array of objects. But each time i receive this data, currency type can differ between 3 and stays same in the whole array of objects.

My problem here is that when i try to do the addition idk about the key beforehand which key(currency_type) it is. I have tried an approach using map and OR operator.

Here is the controller:

  const getHistorycalPrices = async (req: IGetHistorycalPricesRequest, res: IGetHistorycalPricesResponse) => {
    
      try {
        if (!req.query.currency) {
          res.status(400).send({
            success: false,
            message: "Could not get historycal prices",
          });
          return;
        }
    
        // Gets currency column by query from crypto DB table
        const allPrices = await Crypto.findAll({ attributes: [req.query.currency, 'createdAt'], order: [['createdAt', 'DESC']] });
    
        if (!allPrices) {
          res.status(400).send({
            success: false,
            message: "Could not get historycal prices",
          });
          return;
        }
    
        // Get first row from crypto DB table
        const firstRowPrices = await Crypto.findByPk(1);
    
        if (!firstRowPrices) {
          res.status(400).send({
            success: false,
            message: "Could not get first row prices",
          });
          return;
        }
    
        res.status(200).send({
          success: true,
          message: "Successfully retrieved historycal prices",
          data: allPrices.map((price) => ({
            cryptoPrices: (+price.BTCUSD + +firstRowPrices.BTCUSD).toString() ||
                          (+price.ETHUSD + +firstRowPrices.ETHUSD).toString() ||
                          (+price.LTCUSD + +firstRowPrices.LTCUSD).toString(),
            createdAt: price.createdAt.toDateString(),
          })),
        });
        return;
      } catch (e) {
    
        res.status(500).send({
          success: false,
          message: "Server error",
        });
        return;
      }
    };

Right now when I'm sending the data if it's the first line I'll get -

But if it's the ETHUSD OR the LTCUSD I'll get -

There is a problem with my OR operator in the allPrices.map but I can't understand what it is.