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使用MetaMask
1.安装ethers 库（v5，连接v6版本代码有出入）

npm install ethers@5

示例代码

import { ethers } from 'ethers';
 
async function connectWallet() {
  if (window.ethereum) {
    await window.ethereum.request({ method: 'eth_requestAccounts' });
    const provider = new ethers.providers.Web3Provider(window.ethereum);
    const signer = provider.getSigner();
    console.log("Connected Wallet Address:", await signer.getAddress());
  } else {
    console.log('Please install MetaMask!');
  }
}

使用WalletConnect
WalletConnect支持多种区块链和多种类型的钱包。首先，安装WalletConnect库：

npm install @walletconnect/web3-provider

示例代码（使用@walletconnect/web3-provider）:

import WalletConnectProvider from "@walletconnect/web3-provider";
import Web3 from "web3";
 
async function connectWallet() {
  const provider = new WalletConnectProvider({ rpc: { 1: "https://rpc.ankr.com/eth" } });
  await provider.enable(); // This will prompt the user to connect their wallet if they are not already connected.
  const web3 = new Web3(provider);
  const accounts = await web3.eth.getAccounts();
  console.log("Connected Wallet Address:", accounts[0]);
}