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我正在尝试在 unsing hardhat 的主网分叉上交换 uniswap 上的令牌,但我收到此错误:Error: Transaction reverted without a reason string. 我真的不知道为什么。

这是我的交换功能:

    function swap(address router, address _tokenIn, address _tokenOut, uint _amount) public {
        IERC20(router).approve(router, _amount);
        address[] memory path;
        path = new address[](2);
        path[0] = _tokenIn;
        path[1] = _tokenOut;
        uint deadline = block.timestamp + 300;  
        IUniswapV2Router(router).swapExactTokensForTokens(_amount, 1, path, address(this), deadline);  
}

这是一个简单的功能,它应该可以工作。这就是我所说的:

await arb.swap(
    uniAddress,
    wethAddress,
    daiAddress,
    ethers.utils.parseEther('0.5')
);

感谢您的回答!

这里还有我打电话的地址,只是为了验证它们是否正确,但我很确定它们是:

const wethAddress = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2';
const daiAddress = '0x6B175474E89094C44Da98b954EedeAC495271d0F';
const uniAddress = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D';
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1 回答 1

1

Weth与其他令牌不同,您无法使用swapTokensForTokens. 我们必须使用该swapEthForTokens函数,并且您必须单独声明 data 选项。

所以在你的情况下,我们需要做:

坚固性代码:

function swapEth(address router, address _tokenIn, address _tokenOut, uint _amount) public {
    IERC20(router).approve(router, _amount);
    address[] memory path;
    path = new address[](2);
    path[0] = _tokenIn;
    path[1] = _tokenOut;
    uint deadline = block.timestamp + 300;
    IUniswapV2Router(router). swapExactETHForTokens(... parameters);  
}

JS代码

const dataOption = { gasPrice: ethers.getDefaultProvider().getGasPrice(), gasLimit: 310000, value: ethers.utils.parseEther('0.5') }

await arb.swap(`enter code here`
    uniAddress,
    wethAddress,
    daiAddress,
    ethers.utils.parseEther('0.5'), // this parameter should be remove from the function declaration as well as in this Javascript
    dataOption
);

于 2022-02-17T06:46:15.027 回答