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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

  • REST API with Flask for blockchain operations
  • Database persistence layer with SQLite
  • Merkle tree implementation for efficient transaction verification
  • Performance benchmarking suite
  • Integration tests for end-to-end scenarios
  • Pre-commit hooks configuration

[1.0.0] - 2024-11-13

Added

  • Complete blockchain reorganization with modular architecture
  • Modular package structure (blockchain_core)
  • Separate modules for blockchain, block, wallet, transaction, and utilities
  • Comprehensive CLI interface using Click
    • Wallet management (create, load, export)
    • Mining operations
    • Transaction creation and validation
    • Blockchain exploration and validation
    • Statistics and reporting
  • Full test suite with pytest
    • Unit tests for all components
    • Test coverage configuration
    • 5 comprehensive test modules
  • Enhanced documentation
    • Rewritten README with detailed examples
    • Complete API documentation
    • Code examples (basic and advanced)
  • Docker support
    • Dockerfile for containerized deployment
    • docker-compose.yml for development
    • .dockerignore for optimized builds
  • CI/CD with GitHub Actions
    • Multi-version Python testing (3.8-3.11)
    • Linting and code quality checks (flake8, pylint, black)
    • Security scanning (bandit, safety)
    • Docker build verification
    • Example execution tests
  • Configuration management system
  • Professional project structure
    • setup.py for package installation
    • requirements.txt with all dependencies
    • pytest.ini for test configuration
    • .gitignore for clean repository
  • Type hints throughout codebase
  • Enhanced error handling and logging
  • Comprehensive docstrings for all functions

Changed

  • Split monolithic blockchain.py into separate, maintainable modules
  • Improved code organization with proper separation of concerns
  • Enhanced security with better validation
  • Improved transaction verification
  • Better balance calculation
  • More robust proof-of-work implementation

Documentation

  • CONTRIBUTING.md with contribution guidelines
  • CODE_OF_CONDUCT.md for community standards
  • SECURITY.md for security policies
  • Complete API reference in docs/API.md
  • Usage examples in examples/ directory

[0.1.0] - 2024-10-XX

Added

  • Initial blockchain implementation
  • Basic Block class
  • Simple Blockchain class with genesis block
  • Wallet class with ECDSA key generation
  • Transaction signing and verification
  • Proof of work consensus
  • Basic balance tracking
  • Simple main function demo

Features

  • SHA-256 hashing for blocks
  • ECDSA SECP256K1 for cryptographic signatures
  • Configurable mining difficulty
  • Miner rewards
  • Transaction validation
  • Node registration

Version History Summary

[1.0.0] - Major Release

  • Complete rewrite and reorganization
  • Production-ready with comprehensive testing
  • Professional documentation and deployment infrastructure
  • CLI, API, Docker, and CI/CD support

[0.1.0] - Initial Release

  • Basic blockchain functionality
  • Core cryptographic features
  • Simple demonstration

Upgrade Guide

Migrating from 0.1.0 to 1.0.0

The 1.0.0 release introduces breaking changes with a complete reorganization:

Import Changes

Old:

from blockchain import Blockchain, Block, Wallet

New:

from blockchain_core import Blockchain, Block, Wallet, Transaction

File Structure Changes

The monolithic blockchain.py has been split into:

  • blockchain_core/blockchain.py - Main Blockchain class
  • blockchain_core/block.py - Block class
  • blockchain_core/wallet.py - Wallet class
  • blockchain_core/transaction.py - Transaction class
  • blockchain_core/utils.py - Utility functions

API Changes

Most APIs remain compatible, but some enhancements:

  • Added type hints to all functions
  • Enhanced error handling
  • Improved logging
  • Better validation

New Features

Take advantage of new features:

  • Use the CLI: blockchain --help
  • REST API: Start with python -m api.blockchain_api
  • Persistence: Save/load blockchain from database
  • Tests: Run with pytest

Release Notes Template

[X.Y.Z] - YYYY-MM-DD

Added

  • New features

Changed

  • Changes to existing functionality

Deprecated

  • Soon-to-be removed features

Removed

  • Removed features

Fixed

  • Bug fixes

Security

  • Security improvements

For more details on each release, see the GitHub Releases page.