hyperledger-solang_solang/tests/contract_testcases/substrate/functions/external_call_args.sol

interface IUniswapV2Router01 {
    function WETH() external pure returns (address);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
}

library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }
    
}

contract Swap_ETH_TO_USDX{
    
  using SafeMath for uint;
  address distTokens;
  uint deadline;
  uint feerate;
  IUniswapV2Router01 public uniswapRouter;
   
   receive () external payable {
        address[] memory paths = new address[](2);
        paths[0] = uniswapRouter.WETH();
        paths[1] = distTokens;
        uint[] memory amounts=uniswapRouter.swapExactETHForTokens {value: msg.value.mul(feerate).div(10000)}({amountOutMin: 0, path: paths, to: address(this), deadline: block.timestamp+deadline});
   }
  
 
}