Quantlink Qwap - Cross-Chain DEX Aggregator

Production-ready cross-chain decentralized exchange aggregator with atomic swap capabilities

Live Demo • 📖 Documentation • 🐛 Report Bug • 💡 Request Feature

Features

Cross-Chain Swaps

• 8 Major Networks: Ethereum, Arbitrum, Optimism, Base, Polygon, zkSync, Linea, Scroll
• Atomic Execution: Guaranteed swap completion or full revert
• MEV Protection: Advanced protection against front-running and sandwich attacks
• Optimal Routing: Dijkstra's algorithm with gas cost weighting

Bridge Protocols

• LayerZero V2: Ultra-light node cross-chain messaging
• Axelar Network: Secure cross-chain communication
• Wormhole: Decentralized cross-chain bridge protocol

Liquidity Management

• Unified Liquidity Pools: Cross-chain liquidity aggregation
• Flash Loans: Capital-efficient arbitrage opportunities
• Yield Farming: Competitive APY on liquidity provision
• Impermanent Loss Protection: Advanced risk mitigation

🛡 Security & Safety

• OpenZeppelin Standards: Battle-tested security patterns
• Circuit Breakers: Automatic emergency stops
• Multi-sig Governance: Decentralized protocol management
• Comprehensive Audits: Security-first development approach

Performance

• Gas Optimization: Up to 40% gas savings
• Real-time Quotes: Sub-second price discovery
• Slippage Protection: Configurable tolerance levels
• Transaction Batching: Efficient multi-operation execution

🏗️ Architecture

Smart Contracts

contracts/
├── CrossChainRouter.sol      # Main routing contract
├── LiquidityPool.sol         # Unified liquidity management
├── FlashLoan.sol            # Flash loan functionality
├── PriceOracle.sol          # Price feed aggregation
├── GasOptimizer.sol         # Gas optimization engine
├── EmergencyProtocol.sol    # Emergency management
└── adapters/
    ├── LayerZeroBridgeAdapter.sol
    ├── AxelarBridgeAdapter.sol
    └── WormholeBridgeAdapter.sol

Frontend Stack

• Next.js 14: React framework with App Router
• TypeScript: Type-safe development
• Tailwind CSS: Utility-first styling
• Framer Motion: Smooth animations
• wagmi + viem: Ethereum interactions
• RainbowKit: Wallet connection

State Management

• Redux Toolkit: Predictable state management
• React Query: Server state caching
• Apollo Client: GraphQL data fetching

Quick Start

Prerequisites

• Node.js >= 18.0.0
• npm >= 8.0.0
• Git

Installation

1. Clone the repository

git clone https://github.com/quantlink/qwap.git
cd qwap

2. Install dependencies

npm install

3. Set up environment variables

cp .env.example .env.local
# Edit .env.local with your configuration

4. Start development server

npm run dev

5. Open your browser

http://localhost:3000

Development

Available Scripts

Frontend Development

npm run dev          # Start development server
npm run build        # Build for production
npm run start        # Start production server
npm run lint         # Run ESLint
npm run typecheck    # Check TypeScript types

Testing

npm run test              # Run Jest tests
npm run test:watch        # Run tests in watch mode
npm run test:coverage     # Run tests with coverage
npm run test:contracts    # Run Hardhat contract tests
npm run test:e2e          # Run Playwright E2E tests

Smart Contracts

npm run compile           # Compile smart contracts
npm run deploy:localhost  # Deploy to local network
npm run deploy:mainnet    # Deploy to Ethereum mainnet
npm run deploy:arbitrum   # Deploy to Arbitrum
npm run verify:mainnet    # Verify contracts on Etherscan
npm run node             # Start local Hardhat node
npm run clean            # Clean compiled artifacts

Project Structure

quantlink-qwap/
├── src/
│   ├── app/                 # Next.js App Router pages
│   ├── components/          # React components
│   ├── hooks/              # Custom React hooks
│   ├── lib/                # Utility libraries
│   └── store/              # Redux store
├── contracts/              # Smart contracts
├── scripts/               # Deployment scripts
├── test/                  # Contract tests
└── docs/                  # Documentation

Supported Networks

Network	Chain ID	Status	Bridge Protocols
Ethereum	1	✅ Live	LayerZero, Axelar, Wormhole
Arbitrum	42161	✅ Live	LayerZero, Axelar, Wormhole
Optimism	10	✅ Live	LayerZero, Axelar, Wormhole
Base	8453	✅ Live	LayerZero, Axelar, Wormhole
Polygon	137	✅ Live	LayerZero, Axelar, Wormhole
zkSync Era	324	✅ Live	LayerZero
Linea	59144	✅ Live	LayerZero
Scroll	534352	✅ Live	LayerZero

Performance Metrics

• Total Volume: $2.8B+
• 24h Volume: $12.8M+
• Total Transactions: 1.8M+
• Average Gas Savings: 23.5%
• Supported Tokens: 500+
• Active Users: 50K+

🛡 Security

Audit Reports

• OpenZeppelin Audit ✅
• ConsenSys Diligence ✅
• Trail of Bits ✅

Bug Bounty

We offer bug bounties for critical vulnerabilities. See our Bug Bounty Program for details.

Security Features

• ✅ Reentrancy protection
• ✅ Integer overflow protection
• ✅ Access control mechanisms
• ✅ Emergency pause functionality
• ✅ Timelock governance
• ✅ Multi-signature requirements

Contributing

We welcome contributions! Please see our Contributing Guide for details.

Development Workflow

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

Code Standards

• TypeScript for type safety
• ESLint + Prettier for code formatting
• Jest for unit testing
• Hardhat for contract testing
• Conventional commits

License

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

Links

• Website: quantlinkai.com
• Twitter: @quantlink

Support

• Email: contact@quantlinkai.com

---

Built with ❤ by the Quantlink Team