用Uniswap交换

Question

这是我的代码：

// SPDX-License-Identifier: UNLICENCED

pragma solidity <0.9.0;

interface UniswapInterface{
   function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
}

interface IERC20{
    function balanceOf(address account) external view returns (uint256);
    function decimals() external view returns (uint8);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}


contract swapContract{
    address public UniSwapRouterAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address public USDCAddress = 0x2fB298BDbeF468638AD6653FF8376575ea41e768;
    address public BTCAddress = 0x577D296678535e4903D59A4C929B718e1D575e0A;

    IERC20 USDC = IERC20(0x2fB298BDbeF468638AD6653FF8376575ea41e768);
    IERC20 BTC = IERC20(0x577D296678535e4903D59A4C929B718e1D575e0A);

    UniswapInterface UniSwapRouter = UniswapInterface(UniSwapRouterAddress);

    function approveUSDC() public{
        USDC.approve(UniSwapRouterAddress, 999**9);
    }
    function approveBTC() public{
        BTC.approve(UniSwapRouterAddress, 999**9);
    }

    function deposit(uint256 amount) public{
        require(amount > 0, "0 is not accepted!");
        uint256 allowance = USDC.allowance(msg.sender, address(this));
        require(allowance >= amount, "Check USDC allowance");
        USDC.transferFrom(msg.sender, address(this), amount);
    }
    
    function withdraw() public {
        USDC.transfer(msg.sender, USDC.balanceOf(address(this)));
    }

    function swapUSDC() public {
        address[] memory Path = new address[](2);
        Path[0] = USDCAddress;
        Path[1] = BTCAddress;
        UniSwapRouter.swapExactTokensForTokens(
            100000000,
            0,
            Path,
            address(this),
            block.timestamp + 240
        );
    }
}

我只想在上将1 USDC (其小数为8)交换为BTC。

我尝试了这么多的改变，比如增加deadline，改变amountIn和amountOutMin，但是没有收获。此外，Uniswap的资金池也有流动性。

错误只是说：

气体估计错误与以下信息(见下文)。事务执行可能会失败。你想强行发送吗？执行恢复

我已经检查了堆叠溢出的答案，但没有找到解决方案。

Answer 1

我试着找出问题出在哪里，并意识到最有可能没有这样的池。

如果您转到Uniswap，您将看到池是为 V3创建的，并且您正在尝试使用路由器的V2地址。

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解决这个问题的方法有两种，第一种是在V2中创建一个流动性池或通过V3进行交换。