Metamask: How to connect react web to metamask mobile appliacation?

Here’s an article on how to connect your React web application to MetaMask mobile application:

Connecting MetaMask Wallet to Your React Web Application

In this guide, we’ll walk you through the process of connecting your React web application with MetaMask wallet, allowing users to securely manage their Ethereum accounts and interact with your app.

Step 1: Create a MetaMask Extension

Before connecting your React web application to MetaMask, you need to create an extension for both Android and iOS devices. This will allow users to access your app directly from the browser or mobile device.

To create a MetaMask extension:

• Go to the MetaMask website ([ on Chrome)

• Click “Create Extension”

• Choose “Android” as the platform and click “Next”

• Fill in your name, email, and password

• Set up your Google Chrome account (for Android)

• Upload a manifest file to register your extension

• Publish your extension for public use

For iOS:

• Go to the App Store (on an iPhone or iPad) and search for “MetaMask”

• Tap “Get” to download and install MetaMask on your device

• Open MetaMask and tap “Add Extension”

• Follow the same steps as above to register your extension

Step 2: Integrate with Your React Web Application

Once you have created a MetaMask extension, you can now integrate it with your React web application. This will allow users to access MetaMask directly from their browser or mobile device.

To do this:

• In your React app’s index.js file, import the MetaMask library and configure it:

import { MetaMask } from 'web3-react';


const MetaMaskProvider = ({ account }) => {

  const [account, setAccount] = useState(account || '');


  return (

    

      

        ref={metaMaskRef}

        type="module"

        id="react-metamask-client"

        async config={{ accounts: [] }}

        accounts={[]} // This is where you'll configure MetaMask to allow your app to access specific accounts

        injectScripts={() => {}} // Optional: Inject scripts and styles from the MetaMask library

      />

    

  );

};

In this example, we’re importing the MetaMask library and defining a provider component that wraps our React app. We’re passing an array of accounts to the accounts prop, which will configure MetaMask to allow your app to access those specific accounts.

Step 3: Connect to MetaMask

To connect to MetaMask, you’ll need to use its Web API. This is where things get interesting – we can’t directly call MetaMask’s functions from our React application, because it requires a separate browser tab or window to interact with the extension.

To connect to MetaMask, you’ll need to:

• In your index.js file, import the web3 library and create an instance of the Web3 provider:

import Web3 from 'web3';

const web3 = new Web3(new window.ethereum));

Then, use the provider to call MetaMask’s functions directly. For example:

import { MetaMask } from 'react-metamask-client';


const MetaMaskProvider = ({ account }) => {

  const [account, setAccount] = useState(account || '');


  return (

    

      

        ref={metaMaskRef}

        type="module"

        id="react-metamask-client"

        async config={{ accounts: [] }}

        accounts={[]} // This is where you'll configure MetaMask to allow your app to access specific accounts

        injectScripts={() => {}} // Optional: Inject scripts and styles from the MetaMask library

      />

    

  );

};

To connect to MetaMask, we’re passing an array of accounts to the accounts prop. We can also configure MetaMask’s settings using its Web API.

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