Get Liquidity Pool address

main.js

const ethers = require('ethers')
const { toChecksumAddress } = require('ethereum-checksum-address')
require('dotenv').config()

const main = async () => {
    // Connect to an EVM network
    const provider = new ethers.providers.JsonRpcProvider(`https://rpc.ankr.com/bsc`)

    // Create a Factory contract abi 
    const IPair = [
        'function getPair(address token0, address token1) external view returns (address)',
        'function allPairs(uint256 val) external view returns (address)',
        'event PairCreated(address indexed token0, address indexed token1, address pair, uint)',
    ]

    // Checksum the pancake Factory address
    const FactoryAddr = toChecksumAddress('0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73')

    // Make a js obj of a factory contract
    const LP = new ethers.Contract(FactoryAddr, IPair, provider)

    // Checksum the token addresses
    let addr0 = toChecksumAddress('0x9B3a01F8b4aBD2E2a74597B21b7C269ABf4E9f41')
    let addr1 = toChecksumAddress('0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56')

    // Get the LP pair address
    const pairAddress = await LP.getPair(addr1, addr0)
    console.log("Pair Address:=> ", pairAddress)
}

main()
    .then(() => process.exit(0))
    .catch((err) => {
        console.error(err)
        process.exit(1)
    })