SecureFlow - Decentralized Escrow & Freelance Marketplace

🚀 Overview

SecureFlow is a comprehensive decentralized platform combining escrow services with a freelance marketplace, built on Monad blockchain. Features gasless transactions through MetaMask Smart Accounts, multi-arbiter dispute resolution, and reputation systems.

✨ Key Features

🏗️ Core Platform

• Hybrid Escrow + Marketplace: Direct hires and open job applications
• Gasless Transactions: MetaMask Smart Account integration for zero-fee transactions
• Multi-Arbiter Consensus: 1-5 arbiters with quorum-based voting
• Reputation System: Anti-gaming reputation tracking
• Native & ERC20 Support: MON and whitelisted ERC20 tokens

🎯 Advanced Features

• Milestone Management: Submit, approve, reject, dispute milestones
• Job Applications: Freelancers apply to open jobs
• Dispute Resolution: Time-limited dispute windows with arbiter consensus
• Real-time Notifications: In-app notification system
• Client Feedback: Rejection reasons and improvement suggestions

🛡️ Security & Trust

• Smart Account Integration: Delegated execution for gasless transactions
• Paymaster Contract: Gas sponsorship for seamless UX
• Reentrancy Protection: All external functions protected
• Input Validation: Comprehensive parameter checking
• Emergency Controls: Admin pause and refund mechanisms

📁 Project Structure

├── contracts/
│   ├── SecureFlow.sol          # Main escrow & marketplace contract
│   └── Paymaster.sol           # Gas sponsorship contract
├── frontend/                   # Next.js application
│   ├── app/                    # App router pages
│   ├── components/             # UI components
│   └── contexts/               # React contexts
├── scripts/
│   ├── deploy.js               # Contract deployment
│   └── deploy-paymaster.js     # Paymaster deployment
└── test/
    └── SecureFlow.test.js      # Test suite

🚀 Quick Start

Prerequisites

• Node.js 18+
• MetaMask wallet
• Monad testnet access

Installation

1. Clone and install dependencies

git clone https://github.com/your-org/secureflow.git
cd secureflow
npm install
cd frontend
npm install

2. Environment setup

# Copy environment files
cp .env.example .env
cp frontend/.env.example frontend/.env.local

# Configure your environment variables

3. Deploy contracts

# Deploy to Monad testnet
npx hardhat run scripts/deploy.js --network monad
npx hardhat run scripts/deploy-paymaster.js --network monad

4. Start frontend

cd frontend
npm run dev

🎯 User Workflows

For Clients

1. Create Escrow → Set project details, milestones, budget
2. Manage Projects → Review submissions, approve/reject milestones
3. Provide Feedback → Give rejection reasons for improvements

For Freelancers

1. Browse Jobs → View open listings, apply with proposals
2. Work Management → Submit milestones, address feedback
3. Resubmit → Improve rejected milestones with updates

For Arbiters

1. Dispute Resolution → Review cases, vote on resolutions
2. Maintain Integrity → Help resolve platform disputes

🧪 Testing

# Run smart contract tests
npm test

# Run frontend tests
cd frontend
npm test

Test Coverage: 26+ tests covering deployment, escrow creation, marketplace functions, work lifecycle, reputation system, and security.

🚀 Deployment

Smart Contracts

# Deploy to Monad testnet
npx hardhat run scripts/deploy.js --network monad
npx hardhat run scripts/deploy-paymaster.js --network monad

Frontend (Vercel)

# Build for production
cd frontend
npm run build

# Deploy to Vercel
vercel --prod

📊 Current Deployment

• Contract Address: 0x540fDEc0D5675711f7Be40a648b3F8739Be3be5a
• Paymaster Address: 0x5333A1A9Aec72147E972B8A78d0bb0c42fDeE2E2
• Network: Monad Testnet (Chain ID: 10143)
• Status: Production Ready

🔧 Configuration

Smart Contract Settings

// Platform fees (0% for demo)
uint256 public platformFeePercentage = 0;

// Arbiter management
function authorizeArbiter(address arbiter) external onlyOwner
function revokeArbiter(address arbiter) external onlyOwner

Frontend Configuration

// Contract addresses
export const CONTRACTS = {
  SECUREFLOW_ESCROW: "0x540fDEc0D5675711f7Be40a648b3F8739Be3be5a",
  PAYMASTER: "0x5333A1A9Aec72147E972B8A78d0bb0c42fDeE2E2",
};

🔄 Gasless Transaction Flow

1. User connects MetaMask → Smart Account initializes
2. Transaction request → Delegation system activates
3. Gasless execution → Paymaster sponsors gas fees
4. Blockchain confirmation → Transaction completed

🛡️ Security Features

• Reentrancy Protection: All external functions protected
• Input Validation: Comprehensive parameter checking
• Access Control: Role-based permissions
• Emergency Pause: Admin-controlled pause functionality
• Gas Optimization: Efficient contract design

📈 Roadmap

Phase 1: Core Platform ✅

• Smart contract development
• Frontend application
• Basic escrow functionality
• Job marketplace

Phase 2: Advanced Features ✅

• Gasless transactions
• Smart Account integration
• Dispute resolution
• Reputation system

Phase 3: Optimization

• Mobile application
• Advanced analytics
• Multi-chain support

🤝 Contributing

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

📄 License

This project is licensed under the MIT License.

🆘 Support

• GitHub Issues: Report bugs
• Documentation: See project docs for detailed guides

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Built with ❤️ for the decentralized future of work

SecureFlow - Where trust meets technology