hey guys, does anyone know how to check the taxes of an erc20 token through a smart contract without using a local fork?

use eth_call method

you need a custom made contract to simulate buy and sells

what this personalized contract would need to have to be able to simulate buy/sell taxes

taxes are calculated directly in the _transfer function on most tokens, eth_call would not change the state of the chain, would this really work?

if you don't know how much fee the contract is cutting, the only way to test will be to actually use it

yes

eth_call is needed to make the call without changing the state

That's what I thought!😭 I was hoping to find a way to check taxes without wasting gas on verification, but as you said to check I will be forced to use it.

exactly, but how would he check the tax change without changing the state?

this is why you need a contract

in 1 tx you have to buy and sell

you won't
just use eth_call

Let me see if I understand, so I must make a contract that buys and sells, with this I can calculate the difference in tokens received and then find the taxes, I already understand that. But I must call the function of this contract using eth_call to avoid wasting gas, is that it?

exactly

Thank you all very much, I will try to do it this way.

I just came back to say that I managed it using eth_call, thank you friends and merry Christmas to everyone.