Metamask: Event triggered multiple times – wagmi – watchAccount

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Metamask Event Triggers Multiple Times: A React-Based Decentralized Application Example with Wagmi

As a developer, you probably know the importance of seamless interactions between your web application and external services like MetaMask, a popular wallet provider. In this article, we’ll walk you through how to build a React-based decentralized application that uses Metamask event triggers multiple times, using the Wagmi library for an efficient and secure experience.

Project Setup

Before diving into the code, make sure you have the following dependencies installed:

npm install wagmi

Create a new React project using create-react-app if you haven’t already. Next, navigate to your project directory and initialize Wagmi:

npx create-react-app my-wagmi-app --template typescript
cd my-wagmi-app
npm install wagmi

Dapp Components

Create a new file called App.js and add the following code:

import React from 'react';
import { useAccount, useWeb3Modal } from '@wagmi/core';
function App() {
const { account, chainId } = useAccount();
const web3Modal = useWeb3Modal();
return (
 web3Modal.open('connect-wallet')} disabled={account === null}>
Connect Wallet
{/ Render the Web3Modal if it is connected  /}
{web3Modal.isOpen && (

Web3Modal
Chain ID: {chainId}
Account: {account}
)}
);
}
export default App;

In this example, we use the useAccount hook to get the connected wallet account and chain ID. We also use the useWeb3Modal hook to open and close a Web3Modal instance when the user clicks the “Connect Wallet” button.

Connecting to Metamask

To trigger an event that opens a new connection, we will modify our App.js component as follows:

import React, { useEffect } from 'react';
import { useAccount } from '@wagmi/core';
function App() {
const account = useAccount();
useEffect(() => {
if (account !== null) {
web3Modal.open('connect-wallet');
}
}, [account]);
return (
{/ ... /}
);
}
export default App;

In this modified code, we use the useEffect hook to check if the connected wallet account exists. If so, we open a new Web3Modal instance with the label 'connect-wallet'.

Event fires multiple times

To demonstrate that our event fires multiple times, let’s update our App.js component to close the Web3Modal and log back in after each click:

import React, { useEffect } from 'react';
import { useAccount } from '@wagmi/core';
function App() {
const account = useAccount();
useEffect(() => {
if (account !== null) {
web3Modal.open('connect-wallet');
// Close the Web3Modal after a short delay
setTimeout(() => {
web3Modal.close();
}, 1000);
}
}, [account]);
return (
{/ ... /}
);
}
export default App;

In this updated code, we close the Web3Modal after a short delay (1 second) and reconnect to the Metamask instance. This demonstrates that our event fires multiple times when the user interacts with the component.

Conclusion

By following these steps, you can create a React-based Dapp that uses Wagmi to connect to MetaMask and fire events multiple times. This is just one example of how Wagmi provides an efficient and secure way to interact with external services. With proper testing and error handling, your application will be seamless and user-friendly.

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