怎么使用Uniswap中的UniversalRouter

我想通过UniversalRouter中的execute函数来完成ETH和ERC20 token的swap功能，我试图在swap函数中调用execute函数，它是这样的

```
function execute(bytes calldata commands, bytes[] calldata inputs, uint256 deadline)
        external
        payable
        checkDeadline(deadline)
    {
        execute(commands, inputs);
    }
```
这里还有一个Arbiscan上执行交易的一个例子

```
Function: execute(bytes commands,bytes[] inputs,uint256 deadline)

MethodID: 0x3593564c
[0]:  0000000000000000000000000000000000000000000000000000000000000060
[1]:  00000000000000000000000000000000000000000000000000000000000000a0
[2]:  0000000000000000000000000000000000000000000000000000000063fdeb90
[3]:  0000000000000000000000000000000000000000000000000000000000000002
[4]:  0b00000000000000000000000000000000000000000000000000000000000000
[5]:  0000000000000000000000000000000000000000000000000000000000000002
[6]:  0000000000000000000000000000000000000000000000000000000000000040
[7]:  00000000000000000000000000000000000000000000000000000000000000a0
[8]:  0000000000000000000000000000000000000000000000000000000000000040
[9]:  0000000000000000000000000000000000000000000000000000000000000002
[10]: 000000000000000000000000000000000000000000000000000aa87bee538000
[11]: 0000000000000000000000000000000000000000000000000000000000000100
[12]: 0000000000000000000000000000000000000000000000000000000000000001
[13]: 000000000000000000000000000000000000000000000000000aa87bee538000
[14]: 00000000000000000000000000000000000000000000000000eb08bf1ab3308a
[15]: 00000000000000000000000000000000000000000000000000000000000000a0
[16]: 0000000000000000000000000000000000000000000000000000000000000000
[17]: 000000000000000000000000000000000000000000000000000000000000002b
[18]: 82af49447d8a07e3bd95bd0d56f35241523fbab1000bb8fc5a1a6eb076a2c7ad
[19]: 06ed22c90d7e710e35ad0a000000000000000000000000000000000000000000
```
我不知道我应该如何构造出commands和inputs参数以使我能够调用它，有相关的资料或者实现案例可以参考吗？希望社区的大佬们可以帮忙解答下我的困惑。
相关链接：代码https://github.com/Uniswap/universal-router/blob/main/contracts/UniversalRouter.sol
交易https://arbiscan.io/tx/0xb1151d16a8dd84696ec81f9c9c61ec9aa8759099ae51765ba9877ee2313c897f

我想通过UniversalRouter中的execute函数来完成ETH和ERC20 token的swap功能，我试图在swap函数中调用execute函数，它是这样的

function execute(bytes calldata commands, bytes[] calldata inputs, uint256 deadline)
        external
        payable
        checkDeadline(deadline)
    {
        execute(commands, inputs);
    }

这里还有一个Arbiscan上执行交易的一个例子

Function: execute(bytes commands,bytes[] inputs,uint256 deadline)

MethodID: 0x3593564c
[0]:  0000000000000000000000000000000000000000000000000000000000000060
[1]:  00000000000000000000000000000000000000000000000000000000000000a0
[2]:  0000000000000000000000000000000000000000000000000000000063fdeb90
[3]:  0000000000000000000000000000000000000000000000000000000000000002
[4]:  0b00000000000000000000000000000000000000000000000000000000000000
[5]:  0000000000000000000000000000000000000000000000000000000000000002
[6]:  0000000000000000000000000000000000000000000000000000000000000040
[7]:  00000000000000000000000000000000000000000000000000000000000000a0
[8]:  0000000000000000000000000000000000000000000000000000000000000040
[9]:  0000000000000000000000000000000000000000000000000000000000000002
[10]: 000000000000000000000000000000000000000000000000000aa87bee538000
[11]: 0000000000000000000000000000000000000000000000000000000000000100
[12]: 0000000000000000000000000000000000000000000000000000000000000001
[13]: 000000000000000000000000000000000000000000000000000aa87bee538000
[14]: 00000000000000000000000000000000000000000000000000eb08bf1ab3308a
[15]: 00000000000000000000000000000000000000000000000000000000000000a0
[16]: 0000000000000000000000000000000000000000000000000000000000000000
[17]: 000000000000000000000000000000000000000000000000000000000000002b
[18]: 82af49447d8a07e3bd95bd0d56f35241523fbab1000bb8fc5a1a6eb076a2c7ad
[19]: 06ed22c90d7e710e35ad0a000000000000000000000000000000000000000000

我不知道我应该如何构造出commands和inputs参数以使我能够调用它，有相关的资料或者实现案例可以参考吗？希望社区的大佬们可以帮忙解答下我的困惑。相关链接：代码https://github.com/Uniswap/universal-router/blob/main/contracts/UniversalRouter.sol 交易https://arbiscan.io/tx/0xb1151d16a8dd84696ec81f9c9c61ec9aa8759099ae51765ba9877ee2313c897f

0 条评论
分类：DeFi

默认排序时间排序

2 个回答

深山樵夫 2023-12-15 17:11

```js
function swapV2(
        uint256 amountIn,
        address token0,
        address token1
    ) external {
        IERC20(token0).approve(PERMIT2, type(uint256).max);
        permit2.approve(
            token0,
            address(router),
            type(uint160).max,
            type(uint48).max
        );

bytes memory commands = abi.encodePacked(
            bytes1(uint8(Commands.V2_SWAP_EXACT_IN))
        );
        bytes[] memory inputs = new bytes[](1);

address[] memory path = new address[](2);
        path[0] = token0;
        path[1] = token1;
        inputs[0] = abi.encode(address(this), amountIn, 0, path, true);

uint256 deadline = block.timestamp + 1800;

router.execute(commands, inputs, deadline);
    }

function swapV3(
        uint256 amountIn,
        address token0,
        address token1
    ) external {
        IERC20(token0).approve(PERMIT2, type(uint256).max);
        permit2.approve(
            token0,
            address(router),
            type(uint160).max,
            type(uint48).max
        );

bytes memory commands = abi.encodePacked(
            bytes1(uint8(Commands.V3_SWAP_EXACT_IN))
        );
        bytes[] memory inputs = new bytes[](1);

inputs[0] = abi.encode(
            address(this),
            amountIn,
            0,
            bytes.concat(
                bytes20(token0),
                bytes3(uint24(3000)),
                bytes20(token1)
            ),
            true
        );
        uint256 deadline = block.timestamp + 1800;
        router.execute(commands, inputs, deadline);
    }
```

Tiny熊 2023-03-14 10:30

　擅长：智能合约,以太坊