🔗 Blockchain Version Control (BVC)

A decentralized version control system inspired by Git, but powered by blockchain and IPFS. Features cost-optimized local commits with efficient blockchain checkpoints.

📦 NPM Package Users: After installing via npm, BVC works out-of-the-box with Sepolia testnet! Just run bvc config --setup to get started. No local blockchain deployment needed.

✨ Features

• 🚀 Decentralized: No central server required
• ⛓️ Blockchain-powered: Immutable commit history on Ethereum
• 🌐 IPFS storage: Decentralized file storage
• 💰 Cost Optimized: Local commits (free) + blockchain checkpoints (efficient)
• 🔐 Cryptographically secure: SHA256 file hashing
• 💻 Git-like CLI: Familiar commands and workflows
• 🌍 Multi-network: Supports Sepolia testnet, local dev, and mainnet
• ↩️ Version Revert: Revert to any previous commit state

📦 Installation

Global Installation (Recommended)

npm install -g bvc-eth
bvc config --setup  # Quick setup wizard

Local Installation

npm install bvc-eth
npx bvc config --setup  # Quick setup wizard

For Development

git clone https://github.com/Lviffy/BVC.git
cd BVC
npm install
npm link  # or use: node bin/bvc.js

🚀 Quick Start

1. Configure BVC

# Global installation
bvc config --setup

# Local installation  
npx bvc config --setup

What you'll need:

• Ethereum wallet private key (create a new one for testing!)
• Network choice (Sepolia testnet recommended for beginners)
• Test ETH from Sepolia Faucet (free!)

2. Create a Repository

bvc init my-project
cd my-project

3. Add Files and Commit

bvc add README.md
bvc commit -m "Initial commit"

4. Push to Blockchain

bvc push

5. Version Control (Optional)

bvc log                          # View commit history
bvc revert <commit-hash>         # Revert to any previous version

💰 Cost Optimization

BVC is designed for cost efficiency:

Local Commits (Free)

bvc add file.js
bvc commit -m "Add feature"  # No gas fees!

Blockchain Checkpoints (Efficient)

bvc checkpoint --message "Batch multiple commits"  # Single transaction

Benefits:

• ✅ Unlimited local commits (0 gas fees)
• ✅ Batch commits into single blockchain transaction
• ✅ 50-90% gas savings vs individual commits
• ✅ Full Git-like workflow

📋 Complete Command Reference

Repository Management

bvc init [name] - Create repository (blockchain required)

bvc init my-project              # Create blockchain repository
bvc init --local-only my-repo    # Create local repository only
bvc init --interactive           # Interactive setup
bvc init --upgrade-blockchain    # Upgrade local repo to blockchain

bvc config - Configuration management

bvc config --setup               # Interactive setup
bvc config --private-key <key>   # Set wallet private key
bvc config --rpc-url <url>       # Set blockchain RPC
bvc config --ipfs-endpoint <url> # Set IPFS endpoint
bvc config --show                # Show current config

bvc clone <repo-id> - Clone repository

bvc clone 12345abc...            # Clone by repository ID

bvc status - Show repository status

bvc status                       # Show staged/untracked files

File Operations

bvc add <files> - Stage files

bvc add file.js                  # Add single file
bvc add .                        # Add all files
bvc add *.js                     # Add with glob patterns

bvc commit -m "message" - Create commit

bvc commit -m "Add feature"       # Local commit (free)
bvc commit --blockchain -m "msg"  # Direct blockchain commit

bvc revert <commit-hash> - Revert to specific commit

bvc revert 436b0deb               # Revert to specific commit
bvc revert abc123 --force         # Force revert (overwrite changes)
bvc revert def456 --no-backup     # Skip backup creation

Synchronization

bvc push - Push commits to blockchain

bvc push                         # Push individual commits

bvc checkpoint - Batch commits efficiently

bvc checkpoint --message "Batch" # Batch multiple commits
bvc checkpoint --dry-run         # Preview cost savings

bvc pull - Pull latest changes

bvc pull                         # Fetch from blockchain/IPFS

bvc log - View commit history

bvc log                          # Show commit history
bvc log --checkpoints            # Show checkpoint history

Advanced Features

bvc list - List repositories

bvc list                         # Show all repositories

🔧 Configuration

BVC requires blockchain and IPFS configuration:

Required Settings

• Private Key: Your Ethereum wallet private key
• RPC URL: Blockchain network endpoint (Sepolia/Mainnet)
• IPFS Endpoint: IPFS node for file storage

Setup Process

bvc config --setup

This will prompt for:

1. Wallet private key (keep secure!)
2. Blockchain RPC URL
3. IPFS endpoint URL

💡 Usage Examples

Basic Workflow

# Setup
bvc config --setup

# Create repository
bvc init my-app
cd my-app

# Development (free local commits)
echo "console.log('Hello');" > app.js
bvc add app.js
bvc commit -m "Add basic app"

echo "console.log('Hello World');" > app.js
bvc add app.js
bvc commit -m "Improve greeting"

# Efficient blockchain sync
bvc checkpoint --message "Initial app development"

Cost Comparison

# Traditional approach (expensive)
bvc commit --blockchain -m "commit 1"  # Gas fee #1
bvc commit --blockchain -m "commit 2"  # Gas fee #2
bvc commit --blockchain -m "commit 3"  # Gas fee #3

# BVC approach (efficient)
bvc commit -m "commit 1"               # Free
bvc commit -m "commit 2"               # Free
bvc commit -m "commit 3"               # Free
bvc checkpoint --message "All commits" # Gas fee #1 only

Version Control with Revert

# View commit history
bvc log

# Revert to previous version
bvc revert 436b0deb               # Revert to specific commit
bvc status                        # Check restored files

# Continue development
bvc add . && bvc commit -m "Fix after revert"

🏗️ Architecture

Repository Structure

my-project/
├── .bvc/
│   ├── config.json      # Repository configuration
│   ├── commits.json     # Local commit history
│   ├── staging.json     # Staged files
│   └── user-config.json # User blockchain config
├── .bvcignore          # Ignore patterns
└── README.md           # Project files

Data Flow

1. Local Commits: Files hashed and stored locally
2. IPFS Upload: File contents uploaded to IPFS on checkpoint
3. Blockchain Anchor: Commit metadata anchored on Ethereum
4. Merkle Proofs: Cryptographic integrity verification

🔧 Troubleshooting

Common Issues

"Blockchain configuration required"

# Solution: Configure blockchain first
bvc config --setup

"IPFS node not available"

# Install IPFS
# Option 1: Use public gateway
bvc config --ipfs-endpoint https://ipfs.infura.io:5001

# Option 2: Run local IPFS node
ipfs daemon

"Repository does not exist"

• Ensure repository was created with bvc init
• Check repository ID with bvc status

Network Requirements

• Sepolia Testnet: For testing (recommended)
• Ethereum Mainnet: For production use
• IPFS: For decentralized file storage

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test thoroughly
5. Submit a pull request

📄 License

MIT License - see LICENSE file for details.

� Documentation

🚀 Getting Started

• Quick Start Guide - 5-minute setup and basic usage
• Usage Examples - Real-world scenarios and workflows

💰 Cost Optimization

• Cost Optimization Guide - Save 50-90% on gas fees
• Key Features:
  • ✅ Local commits (free)
  • ✅ Blockchain checkpoints (efficient batching)
  • ✅ IPFS integration

📋 Commands & Reference

• Command Reference - Complete command documentation
• Technical Architecture - System design and internals

🔧 Setup & Configuration

• RPC Guide - Blockchain network configuration
• Sepolia Deployment - Testnet deployment guide

🔗 Links

• GitHub Repository
• NPM Package

echo "console.log('Hello BVC!');" > index.js
bvc-eth add index.js
bvc-eth commit -m "Initial commit"

4. Push to Blockchain

bvc-eth push

5. View History

bvc-eth log

6. Collaborate

# Share your repository ID with others
bvc-eth list --mine

# Others can clone your repository
bvc-eth clone <your-repo-id>

# Pull latest changes
bvc-eth pull

📋 Commands

⚙️ Configuration

BVC requires configuration for blockchain and IPFS integration:

bvc config --setup

Required settings:

• Private Key: Your wallet private key
• RPC URL: Blockchain RPC endpoint (Sepolia, Mainnet, etc.)
• IPFS Endpoint: IPFS node URL

🏗️ Architecture

┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│   BVC CLI       │───▶│  Smart Contract  │───▶│   Blockchain    │
│   (Commander)   │    │   (Solidity)     │    │   (Ethereum)    │
└─────────────────┘    └──────────────────┘    └─────────────────┘
         │                       │                       │
         ▼                       ▼                       ▼
┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
│  Local Storage  │    │  File Hashing    │    │      IPFS       │
│   (.bvc/)       │    │   (SHA256)       │    │  (Distributed)  │
└─────────────────┘    └──────────────────┘    └─────────────────┘

🧪 Testing

npm test

📜 License

MIT © Lviffy

🤝 Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📞 Support

• 📧 Issues: GitHub Issues
• 📖 Documentation: Command Guide
• 🌐 Website: GitHub Repository

⚠️ Note: This is an early-stage project. Use at your own risk and test thoroughly before production use.