使用WalletConnect Web3Modal v3 链接钱包基础教程

我使用的是vue+ethers

官方文档：WalletConnect

1.安装

yarn add @web3modal/ethers ethers
或者
npm install @web3modal/ethers ethers

2.引用
新建一个js文件，在main.js中引入，初始化配置sdk


import {createWeb3Modal,defaultConfig,
} from "@web3modal/ethers5/vue";// 1. Get projectId
const projectId = import.meta.env.VITE_PROJECT_ID;// 2. Set chains
const mainnet = {chainId: 1,name: 'Ethereum',currency: 'ETH',explorerUrl: 'https://etherscan.io',rpcUrl: 'https://cloudflare-eth.com'
};// 3. Create modal
const metadata = {name: 'My Website',description: 'My Website description',url: 'https://mywebsite.com',icons: ['https://avatars.mywebsite.com/']
}createWeb3Modal({ethersConfig: defaultConfig({ metadata }),chains: [mainnet],projectId
})

获取 address chainId isConnected相关信息


import { useWeb3ModalAccount } from "@web3modal/ethers5/vue";// 一定要先初始化完成才能调用获取到
const { address, chainId, isConnected } = useWeb3ModalAccount();const getWalletInfo = () => {console.log({address,chainId,isConnected})// 获取更改后的相关操作....
};// 这里可以使用 watch 监听钱包变化
watch(() => address.value,() => {getWalletInfo();}
);

调用签名


import { useWeb3ModalSigner } from "@web3modal/ethers5/vue";// 一定要先初始化完成才能调用获取到
const { signer } = useWeb3ModalSigner();const onSignMessage = async ()=> {try {const signature = await signer.value.signMessage("Hello Web3Modal Ethers");console.log('签名信息',signature);} catch (error) {console.log("签名失败", error);}
}

以上调用方法可以自己结合使用，具体可以参考官方文档

3.网络组件点这里看文档

初始化引用之后再调用

<w3m-button />
<w3m-account-button />
<w3m-connect-button />
<w3m-network-button />

在这里插入图片描述

4.自定义组合点这里看文档


<script setup>
import { useWeb3Modal } from "@web3modal/ethers5/vue";
const { open } = useWeb3Modal();
</script><van-button round type="primary" @click="open()"><span v-if="userStore.address !== ''">{{ userStore.address) }}</span><span v-else>Connect Wallet</span>
</van-button>