Crypto Wallet Generator and Balance Checker for Developers

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Creating and managing cryptocurrency wallets is a foundational skill for blockchain developers. Whether you're building decentralized applications (dApps), testing smart contracts, or exploring blockchain interoperability, having a reliable tool to generate wallets and check balances across multiple networks is invaluable. This guide dives into a lightweight JavaScript project designed to generate Ethereum and Solana wallets using mnemonic phrases and retrieve real-time balance data from both blockchains.

Ideal for developers, testers, and blockchain enthusiasts, this open-source solution simplifies wallet creation and balance checking without relying on third-party services.

Key Features of the Wallet Generator Tool

This JavaScript-based utility provides essential functionalities for interacting with two of the most widely used blockchains: Ethereum and Solana. Here's what it offers:

By supporting both EVM (Ethereum Virtual Machine) and non-EVM ecosystems, this tool bridges development workflows across different blockchain standards.

How It Works: Behind the Scenes

The project leverages industry-standard libraries to ensure cryptographic security and blockchain compatibility. Each function operates deterministically—meaning the same mnemonic will always produce the same wallet pairs—making it perfect for testing and development environments.

Mnemonic & Key Derivation

Using bip39, the tool creates a human-readable seed phrase that serves as the root of all generated keys. This phrase follows BIP39 standards, ensuring compatibility with popular wallets like MetaMask and Phantom.

From this seed:

👉 Discover how secure wallet generation powers modern blockchain development.

Setup and Installation

Getting started is straightforward. Follow these steps to run the project locally:

Step 1: Clone the Repository

Open your terminal and execute:

git clone https://github.com/GarunaJi/Web-3-Wallet.git
cd Web-3-Wallet

Step 2: Install Dependencies

Ensure you have Node.js installed, then run:

npm install bip39 ethereumjs-wallet web3 @solana/web3.js

These packages handle everything from entropy generation to blockchain interaction.

Practical Usage Examples

Once set up, you can integrate these functions directly into your development workflow or use them standalone for quick testing.

Generate a Mnemonic Phrase

const { generateMnemonic } = require('bip39');

const mnemonic = generateMnemonic();
console.log(`Mnemonic: ${mnemonic}`);

This outputs a 12-word phrase that acts as your master seed. Store it securely—anyone with access can control associated wallets.

Create an Ethereum Wallet

const { fromMnemonic } = require('ethereumjs-wallet');
const { hdkey } = require('ethereumjs-wallet');
const ethUtil = require('ethereumjs-util');

const path = "m/44'/60'/0'/0/0";
const hdWallet = hdkey.fromMasterSeed(bip39.mnemonicToSeedSync(mnemonic));
const wallet = hdWallet.derivePath(path).getWallet();
const address = '0x' + wallet.getAddress().toString('hex');
const privateKey = wallet.getPrivateKey().toString('hex');

console.log(`Ethereum Address: ${address}`);
console.log(`Ethereum Private Key: ${privateKey}`);

Generate a Solana Wallet

const { Keypair } = require('@solana/web3.js');
const bip39 = require('bip39');
const { derivePath } = require('ed25519-hd-key');

const seed = await bip39.mnemonicToSeed(mnemonic);
const path = "m/44'/501'/0'/0'";
const derivedKey = derivePath(path, seed.toString('hex')).key;
const secret = Uint8Array.from(derivedKey);
const keypair = Keypair.fromSecretKey(secret);

console.log(`Solana Address: ${keypair.publicKey.toBase58()}`);
console.log(`Solana Private Key: [${Array.from(keypair.secretKey)}]`);

Check Ethereum Balance

const Web3 = require('web3');
const web3 = new Web3('https://mainnet.infura.io/v3/YOUR_INFURA_KEY');

async function getEthBalance(address) {
  const balanceWei = await web3.eth.getBalance(address);
  return web3.utils.fromWei(balanceWei, 'ether');
}

const balance = await getEthBalance(address);
console.log(`Ethereum Balance: ${balance} ETH`);
🔐 Note: You’ll need an Infura or Alchemy API key to query Ethereum mainnet.

Retrieve Solana Balance

const { Connection, PublicKey } = require('@solana/web3.js');
const connection = new Connection('https://api.mainnet-beta.solana.com');

async function getSolanaBalance(publicKey) {
  const balance = await connection.getBalance(new PublicKey(publicKey));
  return balance / 1e9; // Convert from lamports to SOL
}

const solBalance = await getSolanaBalance(keypair.publicKey.toBase58());
console.log(`Solana Balance: ${solBalance} SOL`);

👉 Explore how developers use multi-chain tools to streamline Web3 projects.

Core Keywords for SEO and Developer Search Intent

To align with common search queries and enhance visibility, the following keywords are naturally integrated throughout this guide:

These terms reflect high-intent searches from developers seeking practical, code-level solutions for blockchain integration.

Frequently Asked Questions (FAQ)

Can I use the same mnemonic for both Ethereum and Solana wallets?

Yes. The tool uses standardized derivation paths to generate compatible wallets from a single mnemonic. This enables unified key management across EVM and non-EVM chains.

Is this tool safe for production use?

While cryptographically sound, this project is best suited for educational or testing purposes. For production applications, always use audited libraries and secure key storage mechanisms.

Do I need an API key to check balances?

Yes. To query Ethereum, you’ll need access to an RPC provider like Infura or Alchemy. Solana uses public endpoints, so no API key is required for basic balance checks.

Can I add support for other blockchains?

Absolutely. With minor modifications, you can extend this tool to support Binance Smart Chain, Polygon, or other networks using their respective SDKs.

What happens if I lose my mnemonic?

There is no recovery mechanism. The mnemonic is the sole access point to your wallets. Always back it up securely and never share it.

Does this tool connect to my existing wallets?

No. This is an offline generator. It does not interact with external wallets or expose keys to networks unless explicitly programmed to do so.

Final Thoughts: Empowering Web3 Development

This JavaScript utility exemplifies how simple tools can accelerate blockchain development. By combining mnemonic generation, multi-chain wallet creation, and real-time balance checking, it lowers the barrier to entry for developers exploring decentralized technologies.

Whether you're prototyping dApps, conducting audits, or learning about cryptographic key derivation, this project offers a hands-on approach to mastering core Web3 concepts.

👉 Start building smarter blockchain tools today with advanced crypto resources.

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