Decentralized Skill & Credential Verification Network

A blockchain-based platform for issuing, verifying, and managing professional credentials as NFTs, powered by AI verification and community endorsements.

🌟 Features

• Blockchain Security: Tamper-proof credentials stored on Ethereum
• AI Verification: Multi-AI system using Mistral, Groq, and SerpAPI for credential validation
• NFT Certificates: Unique digital certificates as valuable NFTs
• Peer Endorsements: Community-driven validation and skill endorsements
• Real-time Verification: Instant credential verification with confidence scoring
• MetaMask Integration: Seamless wallet connectivity

🚀 Technology Stack

• Frontend: Next.js, React, Tailwind CSS
• Blockchain: Ethereum (Sepolia Testnet), Hardhat, Solidity
• Web3: Ethers.js, Wagmi, MetaMask
• AI Services:
  • Mistral AI for credential analysis
  • Groq for skill validation
  • SerpAPI for web verification
• Smart Contracts: ERC-721 NFT standard with custom extensions

📋 Prerequisites

• Node.js 18+
• MetaMask wallet
• Sepolia testnet ETH

🛠️ Installation

1. Clone the repository

   git clone <repository-url>
   cd skill-credential-network

2. Install dependencies

   npm install

3. Environment Setup The .env.local file is already configured with your API keys:

   • Mistral AI API Key
   • SerpAPI Key
   • Groq API Key
   • Wallet credentials

4. Compile Smart Contracts

   npm run compile

5. Deploy to Sepolia

   npm run deploy

6. Start Development Server

   npm run dev

🔧 Smart Contract Features

SkillCredentialNFT Contract

• Issue Credentials: Mint NFT certificates with metadata
• Endorsement System: Peer-to-peer skill validation
• Expiry Management: Time-bound credentials
• Verification Status: AI-powered verification tracking
• Rating System: Community-driven credential ratings

Key Functions

function issueCredential(
    address recipient,
    string memory skillName,
    string memory issuerName,
    string memory recipientName,
    uint256 expiryDate,
    string memory metadataURI
) public returns (uint256)

function endorseCredential(
    uint256 tokenId,
    string memory endorserName,
    string memory message,
    uint8 rating
) public

function verifyIssuer(string memory issuerName, bool status) public onlyOwner

🤖 AI Verification System

Multi-Layer Verification

1. Mistral AI Analysis: Credential legitimacy assessment
2. SerpAPI Web Search: Cross-reference with public information
3. Groq Skill Validation: Industry standard compliance check

Verification Process

// AI verification combines multiple confidence scores
const finalConfidence =
  (aiResult.confidence +
    skillValidation.confidence +
    (webVerification.found ? 0.9 : 0.6)) /
  3;

🎨 User Interface

Main Features

• Home Dashboard: Overview with statistics and features
• Issue Credentials: AI-powered credential creation
• My Credentials: Personal credential portfolio with QR sharing
• Verify Credentials: Public verification interface for employers
• QR Code Generation: Easy sharing for instant verification
• Public Verification Pages: Employer-friendly credential verification

Design Highlights

• Gradient backgrounds with glassmorphism effects
• Responsive design for all devices
• Interactive animations and hover effects
• Professional color scheme with blue/purple gradients

🔐 Security Features

• Blockchain Immutability: Credentials cannot be altered once issued
• Multi-signature Verification: AI consensus for authenticity
• Expiry Management: Time-bound credential validity
• Access Control: Owner-only administrative functions

📊 Verification System

Public Verification Pages

• /verify/[tokenId]: Public credential verification page
• /share/[tokenId]: QR code sharing page for credential holders
• QR Code Integration: Instant scanning for employers
• Direct Links: Shareable verification URLs

Employer-Friendly Features

• No Wallet Required: Employers can verify without MetaMask
• Instant Results: Real-time blockchain verification
• Professional Display: Clean, trustworthy verification interface
• Multiple Access Methods: QR codes, direct links, or manual token entry

🚀 Deployment Guide

Local Development

npm run dev

Production Build

npm run build
npm start

Smart Contract Deployment

# Deploy to Sepolia testnet
npm run deploy

# The contract address will be saved to contract-info.json

🔮 Future Enhancements

• IPFS Integration: Decentralized metadata storage
• Multi-chain Support: Polygon, BSC, Arbitrum
• Advanced Analytics: Credential trend analysis
• Mobile App: React Native implementation
• Enterprise Features: Bulk credential management

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Commit your changes
4. Push to the branch
5. Create a Pull Request

📄 License

This project is licensed under the MIT License.

🆘 Support

For support and questions:

• Create an issue in the repository
• Check the documentation
• Review the smart contract code

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Built with ❤️ for the decentralized future of professional credentials