Add Liquidity From A S.C

pragma solidity ^0.8.6;

interface IUniswap {

function addLiquidityETH(
    address token,
    uint amountTokenDesired,
    uint amountTokenMin,
    uint amountETHMin,
    address to,
    uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);

function addLiquidity(
  address tokenA,
  address tokenB,
  uint amountADesired,
  uint amountBDesired,
  uint amountAMin,
  uint amountBMin,
  address to,
  uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);

}

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

contract TestAddLiquidity {

    address internal constant UNISWAP_ROUTER_ADDRESS = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // Ropsten

    IUniswap public uniswap;

    constructor() public {
        uniswap = IUniswap(UNISWAP_ROUTER_ADDRESS);
    }

    function addLiqETH(address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline) external payable {

        IERC20(token).approve(UNISWAP_ROUTER_ADDRESS, amountTokenDesired);
        uniswap.addLiquidityETH(token, amountTokenDesired, amountTokenMin, amountETHMin, to, deadline);
    }

}