anyone know how to do like a comtract clean up function that takes any eth or wrong tokenssent to the comtract and trades them out or withdraws?

// Used to withdraw any BNB which is in the contract address. BNB should never be in this address, so this will be used if someone accidentally
// transfers BNB to this address. This can be used to get them back their BNB.
function withdrawBNB(uint256 amount) public onlyOwner() {

if(address(this).balance == 0)
revert("Contract has a zero balance.");
else
{
if(amount == 0)
payable(owner()).transfer(address(this).balance);
else
payable(owner()).transfer(amount);
}
}

// Used to withdraw tokens transferred to this address. Used to prevent permanently locking tokens which are accidentally sent to the contract address.
// Contact the dev if you accidentally send tokens and we will do our test to return your funds.
function withdrawToken(address token, uint256 amount) public onlyOwner() {
require(amount > 0, "Invalid amount supplied.");
IBEP20(address(token)).transfer(msg.sender, amount);
}

👍

The code above is for the BSC chain, just change the IBEP20 bit to be IERC20

When allowing users to interact with my website what other wallets do i need to support besides Metamask?

The most common wallets are Metamask, trustwallet and Coinbase wallet (You can use WallectConnect to allow most of then and WallectLink to allow Coinbase wallet)

Ok thanks.

Are there any libraries that made supporting multiple wallets like Metamask and Trustwallet easier?

awesome! thanks

https://github.com/Web3Modal/web3modal