Integrating WalletConnect with Vue: A Step-by-Step Guide

Unlocking the Power of WalletConnect in Vue DApps

WalletConnect is a powerful protocol that enables seamless interactions between decentralized applications (DApps) and various wallets. In this article, we’ll explore how to integrate WalletConnect into a Vue DApp, providing a step-by-step guide on setting up the project, building the interface, and implementing the necessary logic.

Getting Started with a Vue.js App

To begin, we’ll create a new Vue project using the Vue CLI. If you haven’t already installed the Vue CLI, run the following command:

bash
npm install -g @vue/cli


Next, create a new project with the following command:

bash
vue create my-walletconnect-app


Choose the “Manually select features” option and select the following features:

• Babel
• CSS Pre-processors
• Linter / Formatter

After creating the project, navigate to the new project folder:

bash
cd my-walletconnect-app


We’ll use Ethers.js in our Vue app to interact with the blockchain while connecting our wallet. Install Ethers.js with the following command:

bash
npm install ethers


Next, install the WalletConnect library:

bash
npm install @walletconnect/web3-provider


To use the WalletConnect library directly in Vue 3, install the node-polyfill-webpack-plugin package:

bash
npm install node-polyfill-webpack-plugin


This plugin is required because our project uses Webpack v5, where polyfill Node core modules were removed.

Building the UI

Create a new file called StatusContainer.vue in the components folder. This component will contain our main page with a welcome message, Connect Wallet button, Disconnect button, and Connected button.

“`html

“`

Open the App.vue file and import the StatusContainer component:

“`html

“`

Instantiating WalletConnect

Create a new folder called walletConnect under the src folder. Inside this folder, create a provider.js file. Import the WalletConnect library, instantiate it using your Infura ID, and export it for use in other files.

“`javascript
import { Web3Provider } from ‘@walletconnect/web3-provider’

const infuraId = ‘YOURINFURAID’

const provider = new Web3Provider({
infuraId,
qrcode: true
})

export default provider
“`

Replace YOUR_INFURA_ID with your actual Infura ID.

Adding Functionality Using Composables

Create a new folder called composables under the src folder. Inside this folder, create a connect.js file. Import the reactive and watch functions from Vue, and create a state object called defaultState.

“`javascript
import { reactive, watch } from ‘vue’

const defaultState = {
status: false,
address: ”,
chainId: ”
}

const STATE_NAME = ‘userState’

const state = reactive(defaultState)

watch(state, (newState) => {
localStorage.setItem(STATE_NAME, JSON.stringify(newState))
})

const getDefaultState = () => {
const storedState = localStorage.getItem(STATE_NAME)
return storedState ? JSON.parse(storedState) : defaultState
}

state.value = getDefaultState()

export { state }
“`

This composable sets up a reactive state object and watches for changes to the state. When the state changes, it updates the local storage with the new state.

Creating Actions

Create three functions: connectWalletConnect, autoConnect, and disconnectWallet. These functions will be used to connect to a wallet, automatically reconnect to a wallet on page refresh, and disconnect from a wallet.

“`javascript
const connectWalletConnect = async () => {
// Call the connect function from WalletConnect here
}

const autoConnect = async () => {
// Call the autoConnect function from WalletConnect here
}

const disconnectWallet = async () => {
// Call the disconnect function from WalletConnect here
}

export { connectWalletConnect, autoConnect, disconnectWallet }
“`

Implementing Logic in Our Components

Open the StatusContainer.vue component and import the connectWalletConnect and disconnectWallet functions. Call these functions when the Connect Wallet and Disconnect buttons are clicked.

“`html

“`

Open the App.vue component and import the autoConnect function. Call this function when the component is mounted.

“`html

“`

That’s it! You have now integrated WalletConnect into your Vue DApp. Users can connect to their wallets, and your app will automatically reconnect to their wallets on page refresh.