Error when calling Execute function in Universal Router

General
5

Well, conceptually, you should not input usdcAmount from the outside, but rather, calculate that amount internally in your function, by calling the pool contract's getAmountsOut function.

For example:

uint256[] memory amounts = IUniswapV2Router02(POOL).getAmountsOut(daiAmount, [DAI, USDC]);
assert(daiAmount == amounts[0]);
uint256 usdcAmount = amounts[1];

Or simply:

uint256 usdcAmount = IUniswapV2Router02(POOL).getAmountsOut(daiAmount, [DAI, USDC])[1];

So you need to import the IUniswapV2Router02 interface, and hard-code the address of that pool contract just as you do with the other hard-coded addresses.