Simple Crypto PHP

A simple and efficient PHP library for cryptocurrency wallet generation and management. Generate addresses for Bitcoin, Ethereum, and all EVM-compatible chains (Polygon, BSC, etc.) using standard BIP protocols.

Features

• Multiple Chain Support:

  • Bitcoin (BTC)
    • Legacy addresses (1...)
    • SegWit addresses (3...)
    • Native SegWit addresses (bc1...)
  • All EVM-compatible chains:
    • Ethereum (ETH)
    • Polygon (MATIC)
    • Binance Smart Chain (BSC)
    • Avalanche (AVAX)
    • And any other EVM chain

• Standards Compliance:

  • BIP32 (Hierarchical Deterministic Wallets)
  • BIP39 (Mnemonic Phrases)
  • BIP44 (Multi-Account Hierarchy)
  • BIP84 (Native SegWit)

• Security Features:

  • Message signing and verification
  • Hardened derivation support
  • Secure key generation

Requirements

• PHP 8.3+
• GMP extension
• Sodium extension
• MBString extension

Installation

composer require php-core/simple-crypto

Quick Start

Generate Multi-Chain Addresses

use PHPCore\SimpleCrypto\Wallet\Mnemonic\BIP39Mnemonic;
use PHPCore\SimpleCrypto\Wallet\KeyPair\BTCKeyPair;
use PHPCore\SimpleCrypto\Wallet\KeyPair\EVMKeyPair;

// Create or import a mnemonic
$mnemonic = new BIP39Mnemonic();
$phrase = $mnemonic->generate(12);
$seed = $mnemonic->toSeed($phrase);

// Create master key pairs
$btcMaster = BTCKeyPair::fromSeed($seed);
$evmMaster = EVMKeyPair::fromSeed($seed);

// Generate Bitcoin addresses
$btcPath = "m/84'/0'/0'/0/0"; // BIP84 for native SegWit
$btcAccount = $btcMaster->derivePath($btcPath);

echo "Bitcoin Legacy: " . $btcAccount->getAddress('legacy') . "\n";
echo "Bitcoin SegWit: " . $btcAccount->getAddress('segwit') . "\n";
echo "Bitcoin Native SegWit: " . $btcAccount->getAddress('native_segwit') . "\n";

// Generate EVM address (works for ETH, MATIC, BSC, etc.)
$evmPath = "m/44'/60'/0'/0/0"; // BIP44 for Ethereum
$evmAccount = $evmMaster->derivePath($evmPath);
echo "EVM Address: " . $evmAccount->getAddress() . "\n";

Generate Multiple Addresses

// Generate multiple Bitcoin addresses
for ($i = 0; $i < 5; $i++) {
    $path = "m/84'/0'/0'/0/{$i}";
    $account = $btcMaster->derivePath($path);
    echo "Address #{$i}: " . $account->getAddress('native_segwit') . "\n";
}

// Generate multiple EVM addresses
for ($i = 0; $i < 5; $i++) {
    $path = "m/44'/60'/0'/0/{$i}";
    $account = $evmMaster->derivePath($path);
    echo "Address #{$i}: " . $account->getAddress() . "\n";
}

Sign and Verify Messages

// Bitcoin message signing
$btcAccount = BTCKeyPair::fromSeed($seed);
$message = "Hello, Bitcoin!";
$signature = $btcAccount->sign($message);
$isValid = $btcAccount->verify($message, $signature);

// EVM message signing
$evmAccount = EVMKeyPair::fromSeed($seed);
$message = "Hello, Ethereum!";
$signature = $evmAccount->sign($message);
$isValid = $evmAccount->verify($message, $signature);

Advanced Usage

Custom Derivation Paths

// Bitcoin paths
$legacyPath = "m/44'/0'/0'/0/0";     // BIP44 legacy
$segwitPath = "m/49'/0'/0'/0/0";      // BIP49 SegWit
$nativePath = "m/84'/0'/0'/0/0";      // BIP84 Native SegWit

// EVM paths
$standardPath = "m/44'/60'/0'/0/0";   // Standard Ethereum
$ledgerPath = "m/44'/60'/0'";         // Ledger Live
$customPath = "m/44'/60'/1'/0/0";     // Custom account

Working with Private Keys

$account = EVMKeyPair::fromSeed($seed);

// Get private key (for import into wallets)
$privateKey = $account->getPrivateKey();

// Get public key
$publicKey = $account->getPublicKey();

// Get compressed public key
$compressedPubKey = $account->getCompressedPublicKey();

Security Considerations

1. Mnemonic Phrases:

   • Store securely
   • Never share with anyone
   • Enables recovery of all derived addresses

2. Private Keys:

   • Keep offline when possible
   • Use hardware wallets for large amounts
   • Each address has its own private key

3. Testing:

   • Use testnet addresses during development
   • Verify addresses before sending real funds

Contributing

1. Fork the repository
2. Create your feature branch
3. Run tests: composer test
4. Submit a pull request

License

MIT License. See LICENSE file for details.

Credits

Developed by PHPCore Team.