How can I calculate APY in goose?

[hyunkicho]

Hello I want to know How to calculate APY by staking Busd

I found out that I could get Egg as an reward when I stake Busd in the nest. I think I could calculate APY from accEggPerShare but I could not figure out how Can I calculate the same APY in the homepage.
Here is a code below that I tried to find out APY
var web3 = new Web3(new Web3.providers.HttpProvider(endpoint)); let contract = new web3.eth.Contract(_contractABI_Goose , _contractAddress_Goose); let PoolInfo_busd = await contract.methods.poolInfo(13).call(); let eggPerBlock = await contract.methods.eggPerBlock().call(); let totalAllocPoint = await contract.methods.totalAllocPoint().call(); let lastRewardBlock_busd = PoolInfo_busd.lastRewardBlock; console.log('lastRewardBlock_busd',lastRewardBlock_busd) let blocknumber = await web3.eth.getBlockNumber() console.log('blocknumber',blocknumber) let getMultiplier = await contract.methods.getMultiplier(lastRewardBlock_busd,blocknumber).call(); console.log('getMultiplier',getMultiplier); console.log("totalAllocPoint",totalAllocPoint) let underliyng_busd = new web3.eth.Contract(_contractABI_busd , _contractAddress_busd); let lpSupply_busd = await underliyng_busd.methods.balanceOf(_contractAddress_Goose).call(); console.log("lpSupply_busd",lpSupply_busd) let accEggPerShare_busd = PoolInfo_busd.accEggPerShare; let allocPoint_busd = PoolInfo_busd.allocPoint; let accEggPerShare_busd_real = (accEggPerShare_busd)/(1e12); console.log(accEggPerShare_egg_real*accEggPerShare_busd_real); let eggReward_busd = ((getMultiplier*eggPerBlock*allocPoint_busd)/(totalAllocPoint)); console.log("eggReward_busd",eggReward_busd) let new_accEggPerShare_busd = (accEggPerShare_busd_real + eggReward_busd*(1e12))/(lpSupply_busd); console.log("new_accEggPerShare_busd",new_accEggPerShare_busd)