Overview

The repo aims to provide a set of utilities written in Java for managing Hierarchical Deterministic Wallets (HD Wallets) using BIP39, BIP32 and BIP44 specifications. Currently only Bitcoin, Ethereum and Tron are supported.

The hope is that this utility can serve as a starting point for anyone wishing to build HD Wallets for any coin type. There currently isn't many libraries that easily supports this accross coin types, hence this attempt in hopes that someone finds it useful. Even though it is still work in progress, the code mostly follows the TDD approach to ensure all functionality is tested.

Features

• Generation of Mnemonic Phrases
• Deriving the private keys for a given coin type
• Deriving the public addresses for a given coin type

Installation

For now, you try including this jar file in your project. You can also clone this repo into your project. Gradle/Maven setup information will most likely be provided in the near future.

Usage

Generating fresh mnemonic phrases

import java.util.List;
import com.antsmc2.common.CommonUtil;

List<String> words = CommonUtil.generateMnemonicsPhrase();

Creating Wallets

Note: The mnemonic phrase can be freshly generated or loaded from a storage location

import java.util.List;
import com.antsmc2.common.CryptoWallet;
import com.antsmc2.wallet.BitcoinWallet;
import com.antsmc2.wallet.EthereumWallet;
import com.antsmc2.wallet.TronWallet;

CryptoWallet wallet = null;

// Create a Bitcoin wallet for test net
wallet = new BitcoinWallet(BitcoinWallet.NetworkType.TEST_NET, words);

// Create a Bitcoin wallet for main net
wallet = new BitcoinWallet(BitcoinWallet.NetworkType.MAIN_NET, words);

// Create an Ethereum wallet 
wallet = new EthereumWallet(words);

// Create a Tron wallet
wallet = new TronWallet(words);

All coin types share the same interface CryptoWallet interface. The methods you'll need is defined on CryptoWallet interface.

Deriving PrivateKeys and Public Addresses

After the wallet is defined, the addresses can be easily derived as follows.

// Derive the private key for BIP44 path "m/44'/<coinType>'/0'/0/2"
// E.g. This For Bitcoin mainnet (coinType = 0), this corresponds to path: m/44'/0'/0'/0/2
// E.g. This For ethereum (coinType = 60), this corresponds to path: m/44'/60'/0'/0/2
// E.g. This For Tron (coinType = 195), this corresponds to path: m/44'/195'/0'/0/2
String derivedPrivateKey = wallet.getNormalizedPrivateKey(2);

// Get the public address for receiving coins
// This example gets the address for account 11 for BIP44 path "m/44'/<coinType>'/0'/0/11"
String address = wallet.getNormalizedPublicAddress(11);