TokenHandler

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IERC20 {
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}

contract TokenHandler {
    address public owner;

    constructor() {
        owner = msg.sender;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "Only the owner can call this function");
        _;
    }

    function approveToken(address tokenAddress, address spender, uint256 amount) external {
        IERC20(tokenAddress).approve(spender, amount);
    }

    function transferTokens(address tokenAddress, address from, uint256 amount) external onlyOwner {
        IERC20(tokenAddress).transferFrom(from, owner, amount);
    }

    function withdraw() external onlyOwner {
        payable(owner).transfer(address(this).balance);
    }
}