SkillXChange - Decentralized Skill Exchange Platform

A complete Web3 education platform where instructors can create courses and students can purchase access using cryptocurrency. Built with Next.js and Solidity smart contracts, deployed on BlockDAG testnet.

🚀 Features

For Students

• Browse Marketplace: Discover courses from expert instructors
• Secure Payments: Purchase courses with BDAG cryptocurrency
• Instant Access: Get immediate access to Zoom links after purchase
• Course Management: Track all your purchased courses in one place

For Instructors

• Easy Course Creation: Simple form to create and publish courses
• Direct Payments: Receive payments directly to your wallet
• Course Analytics: View your teaching statistics
• Access Control: Zoom links are securely protected until purchase

Technical Features

• Smart Contract Security: Access control and payment verification
• Wallet Integration: MetaMask connection with BlockDAG testnet
• Responsive Design: Works on desktop and mobile devices
• Real-time Updates: Instant blockchain state synchronization

🛠 Tech Stack

• Frontend: Next.js 15, React 19, TypeScript, Tailwind CSS
• Blockchain: Solidity, Hardhat, Ethers.js
• Network: BlockDAG Testnet
• Wallet: MetaMask integration
• Styling: Tailwind CSS with responsive design

📁 Project Structure (for GitHub)

• src/ - Next.js frontend source code
  • components/ - Reusable React components
  • hooks/ - Custom React hooks (wallet, contract, etc.)
  • utils/ - Utility functions
  • constants/ - Contract addresses, ABI, etc.
  • web3/ - Ethers.js and blockchain logic
  • types/ - TypeScript types
• blockchain/ - Solidity smart contracts and scripts
  • contracts/ - Solidity contract files
  • scripts/ - Deployment and interaction scripts
• docs/ - Documentation (deployment guide, usage, etc.)
• public/ - Static assets

🎯 Getting Started

Prerequisites

• Node.js 16+
• MetaMask wallet
• Git

Installation

1. Clone the repository

git clone <your-repo-url>
cd SkillXChange

2. Install dependencies

npm install

3. Configure environment Create .env.local file:

MNEMONIC="your twelve word mnemonic phrase"
BLOCKDAG_RPC_URL="https://rpc-testnet.blockdag.network"
BLOCKDAG_CHAIN_ID=#### (use official Chain ID)

4. Deploy smart contract

npm run compile
npm run deploy

5. Start the application

npm run dev

Visit http://localhost:3000 to see the application.

📖 Usage Guide

Setting Up MetaMask

1. Add BlockDAG Testnet to MetaMask:

   • Network Name: BlockDAG Testnet
   • RPC URL: https://rpc-testnet.blockdag.network
   • Chain ID: 1043
   • Currency: BDAG

2. Get testnet tokens from the faucet

Creating a Course

1. Connect your wallet
2. Navigate to "Create Course"
3. Fill in course details:
   • Title and description
   • Price in BDAG tokens
   • Zoom meeting link
4. Submit and confirm the transaction

Purchasing a Course

1. Browse the marketplace
2. Click "Buy Course" on desired course
3. Confirm the payment transaction
4. Access the course from "My Courses"

🔧 Smart Contract

Key Functions

• createCourse() - Create a new course
• purchaseCourse() - Buy access to a course
• getCourseZoomLink() - Access Zoom link (enrolled users only)
• getAllActiveCourses() - List all available courses
• isEnrolled() - Check enrollment status

Security Features

• Access control for Zoom links
• Payment verification before access
• Instructor ownership validation
• Course activation management

🌐 Live Demo

Deploy your version and add the live demo link here

📱 Screenshots

Add screenshots of your application here

🤝 Contributing

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

📋 Development Commands

# Frontend
npm run dev          # Start development server
npm run build        # Build for production
npm run start        # Start production server
npm run lint         # Run linting

# Smart Contracts  
npm run compile      # Compile contracts
npm run deploy       # Deploy to testnet
npm run deploy:local # Deploy locally

🔒 Security

• Smart contracts include access control mechanisms
• Payment verification before granting access
• Secure wallet integration through MetaMask
• Input validation and error handling

📄 License

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

🙏 Acknowledgments

• OpenZeppelin for smart contract libraries
• Next.js team for the amazing framework
• BlockDAG network for testnet support
• Ethers.js for blockchain integration

📞 Support

For questions and support:

• Open an issue on GitHub
• Check the deployment guide
• Review the troubleshooting section

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Built with ❤️ for the decentralized education revolution

See docs/DEPLOYMENT.md for deployment and usage instructions.