Crypto Sudoku

Where Crypto Meets Classic Puzzle Solving

Crypto Sudoku is a revolutionary blockchain-powered gaming experience that combines the timeless challenge of Sudoku with cryptocurrency rewards and NFT technology. Play, solve, compete, and earn in a secure and transparent ecosystem built on multiple blockchain networks.

🌟 Highlights

• Skill-Based GameFi: A true test of logic and strategy with provable fairness
• Multi-Chain Support: Deployed on Mint Sepolia and Monad Testnet
• NFT-Gated Access: Exclusive gameplay for NFT holders
• Cryptographic Verification: Tamper-proof score submission system
• Seasonal Competitions: Regular resets with new leaderboards and rewards
• Cross-Platform UI: Responsive design for both desktop and mobile

🎮 Game Experience

Crypto Sudoku delivers the classic Sudoku puzzle experience enhanced with blockchain technology:

• Familiar Gameplay: Fill the 9×9 grid following traditional Sudoku rules
• Real-Time Scoring: Points calculated based on time and accuracy
• Secure Verification: All submitted scores are cryptographically signed
• Global Competition: Compete against players worldwide on the blockchain leaderboard
• Seasonal Rewards: Top performers earn rewards each season

🧩 Game Mechanics

Scoring System

• Base Formula: Points = (7200 - Time) - (Mistakes × 100)
• Strategy Element: Balance speed vs. accuracy for maximum points
• Time Tracking: Every second counts against your final score
• Mistake Limit: Maximum 10 mistakes allowed per game
• Seasonal Rotation: Fresh competition every 30 days

Blockchain Integration

• NFT Access: Ownership verification through ERC-721 tokens
• Score Validation: Server-side cryptographic signature prevents cheating
• Leaderboard Storage: Top 100 scores stored permanently on-chain
• Cross-Chain Identity: Consistent player experience across networks

🔧 Technical Architecture

Crypto Sudoku consists of three integrated components working in harmony:

Frontend (React/Vite)

src/
├── components/       # UI components including Board, NumberPad etc.
├── context/          # Theme and state management
├── styles/           # CSS modules for styling
├── utils/            # Game logic, blockchain interface
├── config/           # Network configurations
└── App.jsx           # Main application entry

Backend (Node.js)

backend_transaction/
├── server.js         # Express server for signature generation
├── routes/           # API endpoint definitions
└── utils/            # Cryptographic utilities

Smart Contracts (Solidity)

contract/
├── SudokuNFT.sol              # NFT access implementation
└── Sudoku_Leaderboard.sol     # Score storage and verification

⚙️ Technical Details

Frontend Stack

• React + Vite: Modern, fast UI development
• Wagmi & RainbowKit: Seamless wallet connections
• CSS Modules: Scoped styling with theme support
• Web3 Hooks: Custom hooks for blockchain interactions

Backend Stack

• Node.js/Express: Efficient API server
• ethers.js: Ethereum interactions and signing
• CORS Protection: Secure API access
• Environment Management: Configurable deployment options

Smart Contract Features

• Gas Optimization: Efficient storage patterns for minimal gas costs
• Data Types: Carefully chosen for optimal storage (uint32, uint8, etc.)
• Security Measures: Reentrancy protection and access controls
• Event Emission: Complete event logging for off-chain tracking

🔐 Security Features

Crypto Sudoku implements multiple layers of security:

1. Score Signature: Server-side cryptographic verification
2. Puzzle Hashing: Each game session has a unique hash
3. Time-Stamped Signatures: Prevents replay attacks
4. Smart Contract Guards: Prevent manipulation and reentrancy
5. NFT Ownership Checks: Access control through blockchain verification

📡 Network Deployments

Mint Sepolia Testnet

• Chain ID: 1687
• NFT Contract: 0x5E5b7277FFD01CC442184a1c2d375F421f3a1562
• Leaderboard Contract: 0x6b3fddfccfc1f7ccf54f890766e24c5d65697898

Monad Testnet

• Chain ID: 10143
• NFT Contract: 0x74ffe581f893a630db0094757eb8f9c47108606b
• Leaderboard Contract: 0x2a2f9179b137a1fb718f3290cb5bda730c89dec6

📱 User Experience

Crypto Sudoku offers a premium gaming experience:

• Responsive Design: Play on any device with adaptive UI
• Light/Dark Mode: Customizable visual theme
• Sound Effects: Audio feedback for game actions
• Countdown Animation: Engaging game start sequence
• Continuous Feedback: Real-time score calculation and mistake tracking

💻 Development Setup

Prerequisites

• Node.js 16+
• Yarn or NPM
• MetaMask or compatible wallet

Frontend Setup

# Clone the repository
git clone https://github.com/isaacnewton123/crypto-sudoku.git

# Navigate to project directory
cd crypto-sudoku

# Install dependencies
npm install

# Start development server
npm run dev

# Build for production
npm run build

Backend Setup

# Navigate to backend directory
cd backend_transaction

# Install dependencies
npm install

# Create environment file
cp .env.example .env
# Edit .env to add VERIFIER_PRIVATE_KEY

# Start development server
npm run dev

# Start production server
npm start

Smart Contract Deployment

# Navigate to contract directory
cd contract

# Install dependencies
npm install

# Compile contracts
npx hardhat compile

# Deploy contracts
npx hardhat run scripts/deploy.js --network mintsepolia

🗺️ Roadmap

Our vision for Crypto Sudoku includes:

Phase 1: Foundation & Market Validation

• ✅ Successful Testnet Launch: Functional gameplay deployed on Mint Sepolia and Monad Testnet with cryptographic verification system
• 🔄 Strategic Proposal Submission: Engaging with key blockchain platforms and accelerators to secure technical support
• 🔄 Team Expansion: Recruiting specialized talent in blockchain gaming, tokenomics, and growth marketing
• 🔄 Early Adopter Momentum: Building an engaged community of players with demonstrable retention metrics
• 📅 Strategic Fundraising Round: Securing investment from partners who bring both capital and industry expertise
• 📅 Investor Integration: Creating dedicated channels for financial backers to provide strategic guidance
• 📅 Data-Driven Refinement: Implementing analytics systems to capture and act on user feedback and gameplay patterns

Phase 2: Community Growth & Partnerships

• 📅 Strategic partnerships with crypto platforms and gaming communities
• 📅 Expanding player base and community building initiatives
• 📅 Mobile-optimized gameplay experience
• 📅 Infrastructure preparation for future token implementation
• 📅 Mainnet deployment research and planning

Phase 3: Mainnet & Token Planning

• 📅 Mainnet Launch: Planned deployment to production blockchain environments
• 📅 $SUDO Token Launch: Strategic implementation of token economy
• 📅 Cross-Chain Expansion: Planning for additional blockchain integrations
• 📅 Exchange Listings: Preliminary discussions with exchange platforms
• 📅 Mobile App Development: Native applications for Android and iOS platforms
• 📅 Enhanced Gameplay Features: Roadmap for additional game modes and features

👥 Team

Our experienced team combines blockchain expertise with game development skills:

• Hanif Maulana - Initiator & Prompting Engineer
• Claude AI - UI/UX Designer
• Claude AI - Server Development
• Claude AI - Blockchain Specialist

🤝 Contributing

We welcome contributions! Please feel free to submit a pull request or open an issue.

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

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

📞 Contact

• Website: cryptosudoku.xyz
• Twitter: @CryptoSudokuG
• Discord: Join our server
• Telegram: @cryptosudokugame
• Email: info@cryptosudoku.xyz

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Play, Solve, Earn