react-native-fast-eth-wallet

A simple utility to generate Ethereum wallets from a mnemonic seed phrase using react-native-quick-crypto and ethers.

Features

• Generate Ethereum address and private key from a seed phrase (mnemonic).
• Supports multiple wallet derivation paths with an index.
• Uses PBKDF2 with SHA-512 as per BIP39.
• Works smoothly in React Native environments.

Installation

npm install react-native-quick-crypto ethers react-native-fast-eth-wallet

or with yarn

yarn add react-native-quick-crypto ethers react-native-fast-eth-wallet

Usage

import { createWallet } from 'react-native-fast-eth-wallet';

const seedPhrase = 'test test test test test test test test test test test junk';
const index = 0; // Optional: wallet index, default is 0

try {
  const wallet = createWallet(seedPhrase, index);
  console.log('Address:', wallet.address);
  console.log('Private Key:', wallet.privateKey);
} catch (error) {
  console.error(error.message);
}

API

createWallet(seedPhrase: string, index?: number)

• seedPhrase: Your mnemonic seed phrase (required).
• index: Optional derivation index for multiple wallets (default: 0).

Returns an object:

{
  address: string,    // Ethereum address
  privateKey: string, // Private key
}

Throws an error if seed phrase is missing or empty.

How it works

• Cleans the seed phrase.
• Creates a seed using PBKDF2 with salt "mnemonic".
• Derives wallet using path m/44'/60'/0'/0/{index}.
• Returns wallet address and private key.

Dependencies

• react-native-quick-crypto
• ethers

License

MIT License