给我一个 JS 版本的 Uniswap V3 swap 范例代码

抱歉，作为语言模型，我无法提供实时代码。不过，以下是一个 Uniswap V3 swap 的简单示例代码，可以帮助您开始：

const Web3 = require('web3');
const { ChainId, Token, WETH, Pair, Route, Trade, TradeType } = require('@uniswap/sdk');
const { uniswapV3SwapABI } = require('./uniswapV3SwapABI');

// Set up web3 provider
const web3 = new Web3('https://mainnet.infura.io/v3/yourInfuraApiKey');

// Set up Uniswap V3 contract address
const uniswapV3SwapAddress = '0x1F98431c8aD98523631AE4a59f267346ea31F984';

// Set up Uniswap V3 swap contract instance
const uniswapV3SwapContract = new web3.eth.Contract(uniswapV3SwapABI, uniswapV3SwapAddress);

// Set up token addresses
const token0Address = '0x6B175474E89094C44Da98b954EedeAC495271d0F'; // DAI
const token1Address = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'; // WETH

// Set up Uniswap V3 tokens
const token0 = new Token(ChainId.MAINNET, token0Address, 18);
const token1 = new Token(ChainId.MAINNET, token1Address, 18);

// Set up Uniswap V3 pair
const pair = await Pair.fetchData(token0, token1, web3.currentProvider);

// Set up Uniswap V3 route
const route = new Route([pair], token0);

// Set up trade
const amountIn = '1000000000000000000'; // 1 DAI
const trade = new Trade(route, new TokenAmount(token0, amountIn), TradeType.EXACT_INPUT);

// Set up swap parameters
const minAmountOut = '1000000000000000000'; // 1 DAI
const deadline = Math.floor(Date.now() / 1000) + 60 * 20; // 20 minutes from now

// Call Uniswap V3 swap function
const tx = await uniswapV3SwapContract.methods.swap(
  token0Address,
  token1Address,
  amountIn,
  minAmountOut,
  deadline
).send({ from: '0xYourWalletAddress', gas: 2000000 });

请注意，此代码仅用于示例目的，并且可能需要进行更改以适应您的具体用例。