function withdraw(address curvesTokenSubject, uint256 amount) public {
        if (amount > curvesTokenBalance[curvesTokenSubject][msg.sender]) revert InsufficientBalance();

        address externalToken = externalCurvesTokens[curvesTokenSubject].token;
        if (externalToken == address(0)) {
            if (
                keccak256(abi.encodePacked(externalCurvesTokens[curvesTokenSubject].name)) ==
                keccak256(abi.encodePacked("")) ||
                keccak256(abi.encodePacked(externalCurvesTokens[curvesTokenSubject].symbol)) ==
                keccak256(abi.encodePacked(""))
            ) {
                externalCurvesTokens[curvesTokenSubject].name = DEFAULT_NAME;
                externalCurvesTokens[curvesTokenSubject].symbol = DEFAULT_SYMBOL;
            }
            _deployERC20(
                curvesTokenSubject,
                externalCurvesTokens[curvesTokenSubject].name,
                externalCurvesTokens[curvesTokenSubject].symbol
            );
            externalToken = externalCurvesTokens[curvesTokenSubject].token;
        }
        _transfer(curvesTokenSubject, msg.sender, address(this), amount);
        CurvesERC20(externalToken).mint(msg.sender, amount * 1 ether);
    }
