Changelog

[v1.0.0] - First Stable Release

✨ What's Included

This is the first stable release of a modular and educational blockchain built in Java.

It includes all the core functionality required to simulate a minimal blockchain system:

✅ Core Features

• Basic Block structure with previousHash, nonce, timestamp, transactions
• Blockchain class with validation logic (isValidLinkToChain)
• Cryptographically signed transactions (ECDSA) with verification
• Mining logic with adjustable difficulty
• User key generation using elliptic curve (secp256r1)
• Clean output via DisplayUtils and structured logs via LoggerUtils
• Organized codebase with clear package separation (core, util, app)
• Prepared for JSON-based storage (coming in next version)

📦 Directory Structure

src/
├── app/         # Entry point (Main)
├── core/        # Block, Blockchain, Transaction, User
└── util/        # LoggerUtils, DisplayUtils, CryptoUtils, etc.

🚀 How to Run

1. Clone the repo
2. Open in IntelliJ or your Java IDE
3. Run Main.java to simulate a blockchain session

🔜 Coming Next

• Persistent blockchain storage using JSON
• Transaction pool refinement
• CLI or interactive GUI
• Multi-node or networking simulation

🛡 License

MIT — Free to use and modify for learning and experimentation.