    function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {

        // To change the approve amount you first have to reduce the addresses`
        //  allowance to zero by calling `approve(_spender, 0)` if it is not
        //  already 0 to mitigate the race condition described here:
        //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
        require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));

        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
    }
    function _handleDeposit(address _tigAsset, address _marginAsset, uint256 _margin, address _stableVault
, ERC20PermitData calldata _permitData, address _trader) internal {
------
            IERC20(_marginAsset).transferFrom(_trader, address(this), _margin/_marginDecMultiplier);
            IERC20(_marginAsset).approve(_stableVault, type(uint).max);
            IStableVault(_stableVault).deposit(_marginAsset, _margin/_marginDecMultiplier);
------
    }
