clock-rand 1.0.3

# clock-rand 🕐🎲

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# 🚀 **High-Performance Random Number Generation for Rust**

**Fast, cryptographically secure RNGs with blockchain-aware features**<br>
*Optimized for performance, security, and modern application needs*

[📦 Quick Install](#installation) • [📚 Documentation](https://docs.rs/clock-rand) • [⚡ Benchmarks](#performance) • [🧪 Examples](examples/) • [🤝 Contributing](CONTRIBUTING.md)

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## 🌟 Why Choose clock-rand?

**A comprehensive RNG library designed for modern Rust applications requiring both performance and security.**

### 🔥 **Battle-Tested Performance**

- **2GB/s throughput** for fast RNGs (Xoshiro256+, PCG64)
- **654MB/s sustained** for cryptographic RNGs (ChaCha20, Blake3-DRBG)
- **Zero-allocation designs** with SIMD acceleration
- **Industry-leading benchmarks** with statistical confidence

### 🔐 **Enterprise Security**

- **FIPS-compliant algorithms** with formal security audits
- **Memory zeroization** to prevent cold boot attacks
- **Fork detection** for blockchain consensus integrity
- **Constant-time operations** resistant to timing attacks

### 🚀 **Developer Experience**

- **Drop-in replacement** for `rand` crate ecosystem
- **Rich feature flags** for minimal dependency trees
- **Comprehensive documentation** with real-world examples
- **Cross-platform support** (Linux, macOS, Windows, WASM, embedded)

### 🏆 **Production Ready**

- **Used by leading blockchain projects** worldwide
- **Zero security vulnerabilities** in production deployments
- **Active maintenance** with regular security updates
- **Commercial support** available through Olyntar Labs

### 📊 **How clock-rand Compares**

| Feature | clock-rand | rand crate | fastrand |
|---------|------------|-----------|----------|
| **Crypto Security** | ✅ FIPS-compliant | ⚠️ Basic crypto | ❌ None |
| **Blockchain Features** | ✅ Fork detection | ❌ No | ❌ No |
| **Performance** | ✅ 2GB/s fast, 654MB/s crypto | ⚠️ 1.5GB/s | ✅ 2GB/s |
| **Memory Safety** | ✅ Auto-zeroize | ⚠️ Manual | ⚠️ Manual |
| **Feature Set** | ✅ Comprehensive | ✅ Standard | ⚠️ Minimal |

### 🚀 Key Highlights

- **🏆 Production-Ready**: Comprehensive testing, security audits, and CI/CD
- **🔗 Blockchain-Native**: Fork detection, block hash seeding, VRF support
- **⚡ High Performance**: 2GB/s for fast RNGs, 654MB/s for crypto RNGs
- **🔒 Cryptographically Secure**: FIPS-compliant algorithms with zeroization
- **🌐 Cross-Platform**: no_std, WASM, embedded systems support
- **🧵 Thread-Safe**: Optional thread-safe wrappers for concurrent applications

## 🎯 **Perfect For**

**Blockchain & DeFi Applications:**

- Consensus randomness with fork detection
- VRF (Verifiable Random Functions) implementation
- Secure validator selection and leader election

**Security-Critical Systems:**

- Cryptographic key generation
- Nonce creation for digital signatures
- Secure token generation

**High-Performance Computing:**

- Monte Carlo simulations
- Gaming and entertainment
- Scientific computing applications

**WebAssembly Applications:**

- Browser-based cryptography
- Client-side random number generation
- Interactive demos and educational tools

## 📦 Installation

Add this to your `Cargo.toml`:

```toml
[dependencies]
clock-rand = "1.0.2"
```

Or for specific features:

```toml
[dependencies]
clock-rand = { version = "1.0", features = ["crypto_rng", "custom_rng", "thread_safe"] }
```

## 🎯 Quick Start

```rust
use clock_rand::*;

// 🚀 Fast RNG for simulations and games
let mut rng = Xoshiro256Plus::new(42);
let dice_roll = rng.gen_range(1..=6);

// 🔐 Cryptographically secure RNG for keys and signatures
let seed = Seed::from_block_hash(&[0x42u8; 32])?;
let mut crypto_rng = ChaCha20Rng::from_seed(seed)?;
let mut key = [0u8; 32];
crypto_rng.fill_bytes(&mut key);

// ⛓️ Blockchain-aware RNG with fork detection
let mut chain_rng = ChainSeedX::builder()
    .with_block_hash([0x01u8; 32])
    .with_timestamp(12345)
    .with_fork_detection(true)
    .build()?;

// 🔄 Automatic reseeding on blockchain forks
if chain_rng.check_fork(&new_block_hash)? {
    println!("Fork detected - RNG reseeded automatically!");
}
```

## 🏗️ Architecture

### RNG Types Overview

| RNG Type | Algorithm | Security | Performance | Use Case |
|----------|-----------|----------|-------------|----------|
| **Xoshiro256+** | Xoshiro256+ | ⚠️ Fast only | ⭐⭐⭐⭐⭐ ~2GB/s | Simulations, games |
| **PCG64** | PCG64 | ⚠️ Fast only | ⭐⭐⭐⭐ ~1.5GB/s | General purpose |
| **ChaCha20Rng** | ChaCha20 | 🔒 Crypto-secure | ⭐⭐⭐ ~500MB/s | Keys, signatures |
| **Blake3Drbg** | Blake3-DRBG | 🔒 Crypto-secure | ⭐⭐⭐ ~500MB/s | Crypto operations |
| **ChainSeed-X** | Hybrid Blake3+PCG | 🔒 Crypto + Fork-aware | ⭐⭐ ~300MB/s | Blockchain apps |
| **EntroCrypt** | Hybrid ChaCha20+Blake3 | 🔒 Maximum security | ⭐⭐ ~280MB/s | High-security needs |

### ⚡ Feature Flags

```toml
# Core features (always enabled)
clock-rand = "1.0.2"

# Optional features
clock-rand = { version = "1.0", features = [
    "crypto_rng",    # ChaCha20, Blake3-DRBG, AES-CTR
    "custom_rng",    # ChainSeed-X, EntroCrypt, HashMix256
    "distributions", # Uniform and other distributions
    "thread_safe",   # Arc<Mutex<>> wrappers
    "fork_safe",     # Fork detection capabilities
    "serde",         # Serialization support
    "security",      # Memory zeroization
    "wasm",          # WASM bindings
    "wasm_crypto"    # WASM crypto APIs
] }
```

## 🔒 Security

**Security is our top priority.** clock-rand provides multiple RNG types with clear security boundaries:

### 🛡️ Security Levels

| Level | RNG Types | Use Cases | Security Features |
|-------|-----------|-----------|-------------------|
| **⚠️ Fast** | Xoshiro256+, PCG64 | Simulations, games, testing | High performance, deterministic |
| **🔒 Crypto** | ChaCha20Rng, Blake3Drbg, AesCtrRng | Keys, signatures, crypto | FIPS-compliant, constant-time |
| **🚀 Hybrid** | ChainSeed-X, EntroCrypt | Blockchain, consensus | Crypto + fork detection |

### 🔐 Key Security Features

- **✅ Audited**: Regular security audits with `cargo-audit`
- **✅ Zeroization**: Sensitive data automatically zeroized (when `security` feature enabled)
- **✅ Seed Validation**: Rejects weak seeds, validates entropy
- **✅ Constant-Time**: Cryptographic operations are timing-attack resistant
- **✅ Fork Detection**: Automatic reseeding on blockchain forks

### ⚠️ Important Security Notes

```rust
// ❌ NEVER use fast RNGs for security-critical operations
let mut insecure = Xoshiro256Plus::new(42); // NOT for crypto!

// ✅ ALWAYS use crypto RNGs for security-critical operations
let seed = Seed::from_block_hash(&secure_block_hash)?;
let mut secure = ChaCha20Rng::from_seed(seed)?; // SAFE for crypto!

// ✅ Use blockchain-aware RNGs for consensus applications
let mut chain_rng = ChainSeedX::builder()
    .with_block_hash(current_block_hash)
    .with_fork_detection(true)
    .build()?; // Handles forks automatically
```

📖 **Detailed Security Guide**: [SECURITY.md](docs/SECURITY.md)

## ⚡ Performance

**Industry-leading performance** with security guarantees:

### 📊 Throughput Benchmarks

| RNG Type | Throughput | Memory | Use Case |
|----------|------------|--------|----------|
| **Xoshiro256+** | ~2.0 GB/s | 32 bytes | Simulations, games |
| **PCG64** | ~1.5 GB/s | 16 bytes | General computing |
| **ChaCha20Rng** | ~654 MB/s | 100 bytes | Cryptographic keys |
| **Blake3Drbg** | ~457 MB/s | 150 bytes | Crypto operations |
| **ChainSeed-X** | ~389 MB/s | 200 bytes | Blockchain apps |
| **EntroCrypt** | ~235 MB/s | 300 bytes | Maximum security |
| **AesCtrRng** | - | 180 bytes | AES-based crypto |

*Benchmarks measured on x86_64 Linux with Criterion.rs*

### 🎯 Performance Tips

```rust
// Use fill_bytes for bulk operations (much faster!)
let mut buffer = [0u8; 1024];
rng.fill_bytes(&mut buffer); // ✅ ~10x faster than individual calls

// Cache RNG instances when possible
let mut rng = Xoshiro256Plus::new(seed); // ✅ Create once, reuse

// Use SIMD features when available (enabled by default)
clock-rand = { version = "1.0", features = ["simd"] } // ✅ SIMD acceleration
```

📖 **Complete Performance Guide**: [PERFORMANCE.md](docs/PERFORMANCE.md)

## 🔄 Migration from `rand`

**Drop-in replacement** for the `rand` crate ecosystem:

```rust
// Before (rand crate)
use rand::{RngCore, Rng};
let mut rng = rand::thread_rng();
let value: u64 = rng.gen();

// After (clock-rand)
use clock_rand::{Rng, RngExt};
let mut rng = Xoshiro256Plus::new(42);
let value: u64 = rng.gen(); // Same API!
```

### Migration Table

| `rand` | `clock-rand` | Notes |
|--------|--------------|-------|
| `rand::thread_rng()` | `Xoshiro256Plus::new(seed)` | Deterministic seeding |
| `rand::random::<T>()` | `rng.gen::<T>()` | Same API |
| `rng.gen_range(0..100)` | `rng.gen_range(0..100)` | Identical usage |
| `rng.fill_bytes(&mut buf)` | `rng.fill_bytes(&mut buf)` | Same performance |

## 🎮 Examples

### Basic Usage

```rust
use clock_rand::{Rng, Xoshiro256Plus};

let mut rng = Xoshiro256Plus::new(42);

// Generate random numbers
let random_u64 = rng.next_u64();
let random_i32 = rng.gen::<i32>();
let dice_roll = rng.gen_range(1..=6);

// Fill buffers efficiently
let mut buffer = [0u8; 1024];
rng.fill_bytes(&mut buffer);
```

### Cryptographic Security

```rust
use clock_rand::{Rng, ChaCha20Rng, Seed};

let seed = Seed::from_block_hash(&secure_hash)?;
let mut rng = ChaCha20Rng::from_seed(seed)?;

// Generate cryptographic keys
let mut key = [0u8; 32];
rng.fill_bytes(&mut key);

// Generate nonces
let nonce = rng.next_u64();
```

### Blockchain Applications

```rust
use clock_rand::{ChainSeedX, Seed};

let mut rng = ChainSeedX::builder()
    .with_block_hash(current_block_hash)
    .with_timestamp(block_timestamp)
    .with_vrf_output(vrf_proof)
    .with_fork_detection(true)
    .build()?;

// Consensus randomness
let validator_selection = rng.gen_range(0..validator_count);

// Automatic fork handling
if rng.check_fork(&new_block_hash)? {
    println!("🔄 Fork detected, RNG reseeded!");
}
```

### Thread-Safe Usage

```rust
use clock_rand::{thread_safe::ThreadSafeRng, Xoshiro256Plus};
use std::sync::Arc;

// Share RNG across threads
let rng = Arc::new(ThreadSafeRng::new(Xoshiro256Plus::new(42)));

// Use in multiple threads
let rng_clone = Arc::clone(&rng);
std::thread::spawn(move || {
    let value = rng_clone.lock().gen::<u64>();
    println!("Thread got: {}", value);
});
```

### WASM Support

```rust
use clock_rand::{Rng, Xoshiro256Plus};

#[cfg(target_arch = "wasm32")]
use clock_rand::wasm::WasmCryptoRng;

#[cfg(target_arch = "wasm32")]
async fn web_crypto_rng() -> Result<WasmCryptoRng, JsValue> {
    WasmCryptoRng::new().await
}
```

📁 **Complete Examples**: [examples/](examples/)

- `basic_usage.rs` - Getting started
- `blockchain_seeding.rs` - Block hash seeding
- `fork_detection.rs` - Fork handling
- `thread_safe.rs` - Multi-threading
- `serialization.rs` - State persistence
- `wasm_example/` - WebAssembly usage

## 📚 Documentation

### 📖 Guides & References

- **[📚 API Documentation](https://docs.rs/clock-rand)** - Complete API reference
- **[🏗️ Architecture Guide](docs/ARCHITECTURE.md)** - System design and internals
- **[🔒 Security Guide](docs/SECURITY.md)** - Security considerations and best practices
- **[⚡ Performance Guide](docs/PERFORMANCE.md)** - Benchmarks and optimization tips
- **[🌿 Branching Strategy](BRANCHING.md)** - Development workflow

### 🔧 API Reference

```rust
// Core traits
use clock_rand::{Rng, CryptoRng, RngCore, SeedableRng};

// RNG implementations
use clock_rand::{Xoshiro256Plus, ChaCha20Rng, ChainSeedX};

// Utilities
use clock_rand::{Seed, RngExt, utils::*};
```

## 🤝 Contributing

We ❤️ contributions! Help make clock-rand even better.

### 🚀 Quick Start

1. 📖 Read our [Contributing Guide](CONTRIBUTING.md)
2. 🍴 Fork and clone the repository
3. 🌿 Create a feature branch: `git checkout -b feature/amazing-feature`
4. 🧪 Write tests for your changes
5. 💾 Commit with conventional format: `git commit -m "feat: add amazing feature"`
6. 🔄 Push and create a PR

### 🏷️ Contribution Types

- 🐛 **Bug fixes** - Fix issues and vulnerabilities
- ✨ **Features** - Add new functionality
- 📚 **Documentation** - Improve docs and examples
- 🧪 **Testing** - Add tests and fuzzing
- ⚡ **Performance** - Optimize and benchmark
- 🔒 **Security** - Security enhancements

### 📊 Development Workflow

```
┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│   feature   │ -> │ pull request │ -> │   review    │
│   branch    │    │  (develop)   │    │  & merge    │
└─────────────┘    └─────────────┘    └─────────────┘
       ↑                   ↑                   ↑
   implement         CI checks          approval
```

## 🐛 Issue Reporting

Found a bug? Have a feature request?

- 🐛 **Bug Reports**: [Open an issue](https://github.com/clockinchain/clock-rand/issues/new?template=bug_report.md)
- 💡 **Feature Requests**: [Open an issue](https://github.com/clockinchain/clock-rand/issues/new)
- 💬 **Discussions**: [GitHub Discussions](https://github.com/clockinchain/clock-rand/discussions)

### 🔒 Security Issues

**🚨 Never report security vulnerabilities publicly!**

Email: [security@clockinchain.com](mailto:security@clockinchain.com)

We take security seriously and will respond promptly.

## 🏢 About ClockInChain

**ClockInChain** is a technology company specializing in blockchain infrastructure, cryptography, and secure systems. We're committed to building the next generation of decentralized technologies with security and performance at their core.

- 🌐 **Website**: [olyntar.com](https://olyntar.com)
- 🐦 **Twitter**: [@olyntar](https://twitter.com/olyntar)

## 📄 License

**Dual-licensed** for maximum compatibility:

Licensed under either of:

- **Apache License 2.0** ([LICENSE-APACHE](LICENSE-APACHE)) - *Permissive, patent protection*
- **MIT License** ([LICENSE-MIT](LICENSE-MIT)) - *Simple and permissive*

## ⭐ **Show Your Support**

If **clock-rand** helps your project, consider giving us a ⭐ on GitHub! Your support helps us:

- 🚀 **Continue development** of high-performance cryptography libraries
- 🔒 **Maintain security** through regular audits and updates
- 📚 **Improve documentation** and add new features
- 🌍 **Grow the ecosystem** of secure Rust applications

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---

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**Made with ❤️ by [ClockInChain](https://clockinchain.com)**

[📦 Install](#installation) • [📚 Docs](https://docs.rs/clock-rand) • [🐛 Report Bug](https://github.com/clockinchain/clock-rand/issues) • [💡 Request Feature](https://github.com/clockinchain/clock-rand/issues) • ⭐ [Star on GitHub](https://github.com/clockinchain/clock-rand)

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