// SPDX-License-Identifier: GPL-3.0-only

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IBalanceHolder_ERC20} from "./IBalanceHolder_ERC20.sol";

contract BalanceHolder_ERC20 is IBalanceHolder_ERC20 {
    IERC20 public token;

    mapping(address => uint256) public balanceOf;

    event LogWithdraw(address indexed user, uint256 amount);

    function withdraw() public {
        uint256 bal = balanceOf[msg.sender];
        balanceOf[msg.sender] = 0;
        require(token.transfer(msg.sender, bal));
        emit LogWithdraw(msg.sender, bal);
    }
}