Claim ERC-20 tokens by providing and burning a different ERC-20 token?

Smart Contracts
6

I think this simple eg should work Example on how to use ERC20 token in another contract. Did I miss anything?

contract TokenReceiver {

    IERC20 private _token;

    event DoneStuff(address from);

    /**
     * @dev Constructor sets token that can be received
     */
    constructor (IERC20 token) public {
        _token = token;
    }

    /**
     * @dev Do stuff, requires tokens
     */
    function doStuff() external {
        address from = msg.sender;

        _token.transferFrom(from, address(this), _token.balanceOf(from));
        _token.burn(from, _token.balanceOf(from));

        emit DoneStuff(from);
    }
}