如何解决Remix上此Gas估算失败的错误？

问题描述

我的代码是

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.1;

import "https://github.com/Uniswap/uniswap-v2-periphery/blob/master/contracts/interfaces/IUniswapV2Router02.sol";

contract UniswapExample {                           
  address internal constant UNISWAP_ROUTER_ADDRESS = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ;
  IUniswapV2Router02 public uniswapRouter;
  address private multiDaiKovan = 0xaD6D458402F60fD3Bd25163575031ACDce07538D;

  constructor() {
    uniswapRouter = IUniswapV2Router02(UNISWAP_ROUTER_ADDRESS);
  }

  function convertEthToDai(uint daiAmount) public payable {
    uint deadline = block.timestamp + 15; // using 'Now' for convenience,for mainnet pass deadline from frontend!
    uniswapRouter.swapETHForExactTokens{ value: msg.value }(daiAmount,getPathForETHtoDAI(),address(this),deadline);
    
    // refund leftover ETH to user
    (bool success,) = msg.sender.call{ value: address(this).balance }("");
    require(success,"refund Failed");
  }
  
  function getEstimatedETHforDAI(uint daiAmount) public view returns (uint[] memory) {
    return uniswapRouter.getAmountsIn(daiAmount,getPathForETHtoDAI());
  }

  function getPathForETHtoDAI() private view returns (address[] memory) {
    address[] memory path = new address[](2);
    path[0] = uniswapRouter.WETH();
    path[1] = multiDaiKovan;
    
    return path;
  }
  
  //add Harry
  function getaddresWETH() public view returns (address WETHaddress){
      return uniswapRouter.WETH();
  }
  
  //add Harry
  function getAmountsETHforDAI(uint daiAmount) public view returns (uint[] memory) {
    return uniswapRouter.getAmountsOut(daiAmount,getPathForETHtoDAI());  
  }
  
 
  
  
}

i在convertEthToDai函数上输入了100000000000000000输入， 我看到此错误enter image description here

如何解决问题？

这是混音设置 enter image description here

解决方法

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