Metamask: Persist a Web3 provider in Redux to use in different parts of your app

I can help you with an article on how to maintain a Web3 provider in Redux.

Title:

Maintaining a Web3 Provider in Redux: A Guide

Introduction

Web3 providers are essential for interacting with decentralized applications and services (dApps). In this article, we’ll look at how to store a Web3 provider in Redux, ensuring that it persists across different parts of your application. We’ll also discuss how to use Web3Auth for Google sign-in and other common use cases.

Why Store Your Web3 Provider in Redux?

Storing Web3 providers in Redux allows you to share state between components without exposing sensitive information. This is especially useful when working with dApps that require multiple services, such as authentication and Web3 storage.

1. Step 3: Initialize the Web3Provider in Your Application

First, you need to initialize the Web3 provider in your application. You can do this by creating a “Web3” instance and passing it to the “provider” component.

Import Web3 from 'web3';
const web3 = new Web3(window.ethereum);

2. Step 3: Store the Web3 Provider in Redux

To store your Web3 provider in Redux, you can use the “redux-store” package. You need to install it first by running:

npm install redux-store

Next, create a new file called “store.js” and add the following code:

import { CreateStore, compose } from 'redux';
import web3Provider from './web3Provider';
const store = createStore(
combinedReducers({ web3: web3Provider }),
write([window.__REDUX_DEVTOOLS_EXTENSION_COMMONSE], window.__REDUX_DEVTOOLS_EXTENSION__))
);
export default container;

In this code:

• We use the “combineReducers” function to create a combined reducer that includes both the “web3” and Redux state.

• The Web3 provider instance is passed as the “web3” key in the combined reducer.

3. Step 3: Use the Web3 provider in different parts of your application

Now you can use the Web3 provider in different parts of your application. For example:

import React, { useState } from 'react';
importing ReactDOM from 'react-dom';
import { Provider } from './web3Provider';
const Application = () => {
const [state, setState] = useState({ web3: null });
useEffect(() => {
const provider = new Web3(window.ethereum);
.setState((prevState) => ({ ...previous state, web3: provider }));
}, []);
return (
{/ Application content goes here /}
);
};
ReactDOM.render(, document.getElementById('root'));

In this code:

• We use the “useState” hook to store the Web3 provider instance in the Redux state.

• We create a “useEffect” hook that initializes the Web3 provider instance when the app is signed in.

Using Web3Auth for Google Sign-in

When using Web3Auth, you need to handle the authentication process and get an access token. You can do this by calling the “login()” method on the “web3Provider” instance:

Import Web3Auth from 'web3auth';
const login = async() => {
const provider = new Web3(window.ethereum);
try {
const account = await provider.getAccount();
// Use the access token to interact with dApps
} catch(error) {
console. error(error);
}
};

Conclusion

Storing a Web3 provider in Redux allows it to persist across different parts of your application. If you follow these steps, you can use the “web3Provider” instance in your application as needed. Don’t forget to manage the authentication process and obtain an access token when using Web3Auth for Google sign-in.

I hope this article was helpful!