File: Uniswapper.sol
function swapExactIn(
        SwapParams memory swapParams, // SwapParams is a struct
        address receiver
    ) public payable routerIsSet returns (uint256 amountOut) {
        swapParams = _receiveAndWrapIfNeeded(swapParams);

        IV3SwapRouter.ExactInputParams memory params = IV3SwapRouter
            .ExactInputParams({
                path: swapParams.path,
                recipient: address(this),
                amountIn: swapParams.amountIn,
                amountOutMinimum: swapParams.amountOut
            });//@audit no deadline specified.

        IERC20(swapParams.tokenIn).approve(uniswap_router, swapParams.amountIn);
        amountOut = IV3SwapRouter(uniswap_router).exactInput(params);
