Posted By : Rishab
A cross-platform crypto wallet development with React and Web3.js requires multiple steps, ranging from configuring your development environment to using Web3.js to interact with the Ethereum blockchain or other EVM-compatible networks. Below is a general breakdown of the process:
Metamask (or another Web3 provider): To integrate user wallets.
Also, Explore | How to Build a Multi-Chain Account Abstraction Wallet
Follow these steps in VS Code or any preferred editor.
npx create-react-app crossplatform-crypto-wallet
cd crossplatform-crypto-wallet
npm install web3
Install Web3.js in your crossplatform-crypto-wallet
npm install web3
Now let's initialize Web3.js, in your App.js file so that we can connect to a blockchain provider for eg. Metamask:
//Your react application src/app.js
import React, { useEffect, useState } from 'react';
import Web3 from 'web3';
import React, { useEffect, useState } from 'react';
import Web3 from 'web3';
function App() {
const [initializeWeb3, setWeb3] = useState(null);
const [account, setAccount] = useState('');
useEffect(() => {
// Checking if MetaMask is installed
if (window.ethereum) {
const web3 = new Web3(window.ethereum);
setWeb3(web3);
// Request account access if needed
window.ethereum.enable()
.then(accounts => {
setAccount(accounts[0]);
})
.catch(error => {
console.error('User denied the request !', error);
});
} else {
console.error('MetaMask not found. Please install !');
}
}, []);
return (
Platform crypto Wallet
{account ? (
Connected account: {account}
) : (
Please connect your wallet
)}
);
}
export default App;
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For users without a wallet, We can generate a new one using Web3.js:
const createWallet = () => {
const wallet = web3.eth.accounts.create();
console.log('Wallet Address:', wallet.address);
console.log('User Private Key:', wallet.privateKey);
return wallet;
};
To create a transaction or interact with a wallet . We need to integrate some methods to perform these operations
Create a utils file with the name utils.js where we will create and export web3 methods
export const sendTransaction = async (from, to, amount) => {
const transaction = {
from: from,
to: to,
value: web3.utils.toWei(amount, 'ether'),
};
try {
const txHash = await web3.eth.sendTransaction(transaction);
console.log('Transaction successful with hash:', txHash);
} catch (error) {
console.error('Transaction failed:', error);
}
};
Now to see things in action. Create a component with the name sendEth.js.
export default function SendInput() {
const [recipient, setRecipient] = useState('');
const [amount, setAmount] = useState('');
const handleSend = () => {
sendTransaction(account, recipient, amount);
};
return (
Send Ether
setRecipient(e.target.value)}
placeholder='Recipient address'
/>
setAmount(e.target.value)}
placeholder='Amount'
/>
);
}
And import it into your app.js
import React, { useEffect, useState } from 'react';
import Web3 from 'web3';
import SendInput from '../components'
function App() {
const [initializeWeb3, setWeb3] = useState(null);
const [account, setAccount] = useState('');
useEffect(() => {
// Checking if MetaMask is installed
if (window.ethereum) {
const web3 = new Web3(window.ethereum);
setWeb3(web3);
// Request account access if needed
window.ethereum.enable()
.then(accounts => {
setAccount(accounts[0]);
})
.catch(error => {
console.error('User denied the request !', error);
});
} else {
console.error('MetaMask not found. Please install !');
}
}, []);
return (
Platform crypto Wallet
{account ? (
Connected account: {account}
) : (
Please connect your wallet
)}
);
}
export default App;
Add get balance function in your utils.js file
export const getBalance = async (address) => {
const balance = await web3.eth.getBalance(address);
return web3.utils.fromWei(balance, 'ether');
};
Also, Read | How to Build a Real-Time Wallet Tracker
And use it in your app.js to fetch wallet balance
import React, { useEffect, useState } from 'react';
import Web3 from 'web3';
import SendInput from '../components'
function App() {
const [initializeWeb3, setWeb3] = useState(null);
const [account, setAccount] = useState('');
useEffect(() => {
// Checking if MetaMask is installed
if (window.ethereum) {
const web3 = new Web3(window.ethereum);
setWeb3(web3);
// Request account access if needed
window.ethereum.enable()
.then(accounts => {
setAccount(accounts[0]);
})
.catch(error => {
console.error('User denied the request !', error);
});
} else {
console.error('MetaMask not found. Please install !');
}
}, []);
useEffect(() => {
if (account) {
getBalance(account).then(balance => {
console.log('Balance:', balance);
});
}
}, [account]);
return (
Platform crypto Wallet
{account ? (
Connected account: {account}
) : (
Please connect your wallet
)}
);
}
export default App;
Also, Check | Create an Externally Owned Wallet using Web3J and Spring Boot
In summary, building a cross-platform crypto wallet with Web3.js and React enables the creation of secure, accessible, and user-friendly blockchain applications. This approach ensures a seamless user experience across devices, promoting wider engagement and innovation in the crypto space. For more about crypto wallet development, connect with our crypto wallet developers.
December 3, 2024 at 01:12 pm
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