How to get the value of a token.

tokenprice.js

const Web3  = require("web3");
const web3  = new Web3(new Web3.providers.HttpProvider("https://bsc-dataseed1.binance.org:443"));

const mini_abi   = [{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}];
const aggregator = [{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint80","name":"_roundId","type":"uint80"}],"name":"getRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}];

/**
 * @return the real-time price of a token
 */
async function getPrice(contract, pool_address, bnb_price) {
    // the address of the pair. In this case we're using wbnb pair, so we need wbnb address.
    let wbnb_addr = "0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c";
    
    // get the amount of bnb stored in the LP
    let wbnb_balance  = await getBalance(pool_address, wbnb);
        
    // get the amount of tokens stored in the LP
    let token_balance = await getBalance(pool_address, contract);
    
    return wbnb_balance / token_balance * bnb_price;
}

/**
 * @return the balance of a token in a given wallet address.
 */
async function getBalance(wallet, token_contract, decimals = null) {
    let call = await new web3.eth.call({
        to: token_contract, // contract address
        data: "0x70a08231000000000000000000000000"+wallet.replace("0x", "")
    });

    decimals = decimals ? decimals : await getDecimals(contract);
    return parseInt(call) / 10 ** decimals;
}

/**
 * @return integer the number of decimals for the contract
 */
async function getDecimals(address) {
    let contract = new web3.eth.Contract(mini_abi, address);
    let decimals = await contract.methods.decimals().call();
    return decimals;
}

/**
 * @return the latest price of bnb
 */
async function getBnbPrice() {
    try {
        let feed = new web3.eth.Contract(aggregator, "0x0567F2323251f0Aab15c8dFb1967E4e8A7D42aeE");

        let round    = await feed.methods.latestRoundData().call();
        let decimals = await feed.methods.decimals().call();
        let rounded  = (round[1] / 10 ** decimals).toFixed(2)
        return parseFloat(rounded);
    } catch(err) {
        return 0;
    }
}