Extract the amounts(t0, t1) per tick from Uniswap v3 Pool

Question

I want to be extract the amounts of t0 and t1 from a Uniswap v3 Pool.

I was trying with some method which I found on other post, but I think is not working, or I am doing something wrong.

This is the method tried by me:

function extractAmounts(){
            
    const tick = -282260;
    const liquidity = 31494343572914561514 //liquidityNet
    const sqrtPriceCurrent = 58884551862568005367467
                
    const sqrtPriceLow = Math.pow(1.0001, -282260);
    const sqrtPriceHigh = Math.pow(1.0001, -282250);
                
    const sp = Math.max(Math.min(sqrtPriceCurrent, sqrtPriceHigh), sqrtPriceLow)
                
    const amount0 = liquidity * (sqrtPriceHigh - sp) / (sp * sqrtPriceHigh)
    const amount1 = liquidity * (sp - sqrtPriceLow)
                
    console.log(amount0, amount1)
                
}
extractAmounts();

The values printed in console for the tick(wrote manually by me) are not matching with the chart from Uniswap page (USDC locked value, in the image):

https://info.uniswap.org/#/polygon/pools/0xa374094527e1673a86de625aa59517c5de346d32 The values from the image is for example, and is not matching the values from code.

Someone can explain to me how to calculate the amounts for a tick(current/specific one)?

A pool example(polygon): https://polygonscan.com/address/0xa374094527e1673a86de625aa59517c5de346d32#readContract

Answer 1

There is an NPM library that does all these calculations. It's called univ3prices: https://www.npmjs.com/package/@thanpolas/univ3prices/v/3.0.2

Specifically, check univ3prices.getAmountsForCurrentLiquidity (gets amounts for the current tick space) and univ3prices.getAmountsForLiquidityRange (gets amounts for an arbitrary range)

If you are looking for the exact math, it could be found here: see section 3.3.3 in this whitepaper: atiselsts.github.io/pdfs/uniswap-v3-liquidity-math.pdf