When writing a token contract how am I supposed to add the fee collecting smart contract address to the code if I can't edit the token contract

Question

I'm trying to write a token that sends a percentage fee to a fee collecting smart contract that does stuff with the token. I start off with writing a token and I point it toward the fee collecting address (meaning it already has to have been made) then how am I supposed to add the token address to the fee collecting smart contracts source code so after it recives it it can be aware of it and do stuff with it. I can't edit anything

Answer 1

You can use a variable to store the address and update it when needed. Be sure to use modifier to ensure only the owner is able to call the update token address function.

address public tokenAddress;

function updateTokenAddress(address tokenAddy) public 
{
   tokenAddress = tokenAddy;
}