环境是：我想实现跟V3的池子进行兑换代币，不需要走路由协议。请大佬们指点指点。 应该有大佬也有做过，求大佬们给个案例哈 在期间会碰到一些问题，比如兑换的时候，WETH是18位小数点，USDC是6位小数点，这些问题怎么解决呢

pragma solidity ^0.8.0;

import "forge-std/Test.sol";
import "@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol";
import "@uniswap/v3-core/contracts/interfaces/pool/IUniswapV3Pool.sol";
import "@uniswap/v3-core/contracts/libraries/TickMath.sol";

contract UniswapV3SinglePoolSwap is Test {
    Vm cheats = Vm(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);

    IUniswapV3Pool V3_USDC_ETH_Pool = IUniswapV3Pool(0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640); // USDC/ETH Pool
    IERC20 IUSDC = IERC20(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48); // USDC 6位小数点
    IERC20 IWETH = IERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); // WETH 18位小数点

    event string_uint_log(string, uint256);
    event Swap(address indexed sender, uint256 amountIn, uint256 amountOut);

    function setUp() public {
        cheats.createSelectFork("ETH"); // fork ETH主网，
        deal(address(IUSDC), address(this), 100 ether);
        deal(address(IWETH), address(this), 100 ether);
    }

    function testexchange() public {
        uint256 amountIn = 1e18;

        // Get current tick
        (, int24 tick,,,,,) = V3_USDC_ETH_Pool.slot0();

        // Calculate amount out
        uint160 sqrtPriceX96 = TickMath.getSqrtRatioAtTick(tick);
        uint256 amountOut = FullMath.mulDiv(amountIn, sqrtPriceX96, 2 ** 96);
        uint256 amountOutMax = FullMath.mulDiv(amountOut, 9970, 10000); // 0.3% slippage

        // Approve the router to spend USDC tokens
        IERC20(IUSDC).approve(address(V3_USDC_ETH_Pool), amountIn);

        // Swap USDC for WETH in the Uniswap V3 pool
        (uint256 amount0, uint256 amount1) =
            V3_USDC_ETH_Pool.swap(address(this), true, amountIn, amountOutMax, abi.encode(""));

        // Get the amount of WETH received
        uint256 amountOutReceived = amount1 > 0 ? amount1 : amount0;

        // Approve the router to spend WETH tokens
        IERC20(IWETH).approve(address(V3_USDC_ETH_Pool), amountOutReceived);

        // Swap WETH for USDC in the Uniswap V3 pool
        V3_USDC_ETH_Pool.swap(address(this), false, int256(amountOutReceived), 0, abi.encode(""));
    }
}