Cookie Market - Own Your Data, Claim Your Wealth

Your browsing data fuels a $433B industry, but you get $0. Cookie Market changes that - a blockchain marketplace where YOU get paid for YOUR data. Built with Bolt in 5 days. The revolution starts now.

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Inspiration

I spent months researching the data broker industry and discovered something that made me furious: it's a $433 BILLION industry built entirely on OUR data, yet we get exactly $0 from it. Facebook makes $68 per US user annually. Purchase intent data sells for thousands per month. This is digital sharecropping - we create 100% of the value but capture 0% of the profits.

I couldn't just stay angry. I had to build something. In 5 days, using Bolt, I created Cookie Market - a working prototype that proves users CAN and SHOULD get paid for their browsing data.

What it does

Cookie Market flips the exploitative data economy on its head:

  1. Chrome Extension collects browsing data (with user consent)
  2. World ID Integration verifies real humans, preventing bot-generated fake data
  3. Smart Data Packaging automatically categorizes browsing patterns into valuable insights
  4. Decentralized Marketplace where verified buyers purchase data packages with ALGO
  5. Algorand Smart Contracts automatically split payments: 90% to sellers, 10% platform
  6. Instant Withdrawals - sellers can withdraw earnings directly to their Pera wallet

No middlemen. No hidden fees. Just fair, transparent commerce where your data becomes your asset.

How we built it

Day 1-2: Architecture & Smart Contracts

  • Designed the Algorand smart contract with box storage for seller balances
  • Implemented automatic 90/10 payment splitting
  • Built withdrawal mechanisms for both sellers and platform

Day 3: Core Platform

  • Set up Supabase for data storage and user management
  • Integrated World ID for human verification (no bots!)
  • Built React dashboard with separate wallet contexts for buyers/sellers
  • Created Chrome extension for privacy-preserving data collection

Day 4: Marketplace & Integration

  • Developed data packaging algorithm (tech, shopping, news categories)
  • Built marketplace UI with real-time ALGO pricing
  • Integrated Pera wallet for seamless blockchain transactions
  • Connected all components with edge functions

Day 5: Testing & Polish

  • End-to-end testing of purchase flow
  • UI/UX improvements
  • Deployed to Netlify
  • Created demo video

Tech Stack: Bolt.new, React, TypeScript, Algorand, Supabase, World ID, Chrome Extension API, Pera Wallet, Netlify

Challenges I ran into

  1. Algorand Box Storage Learning Curve: Implementing persistent seller balances using box storage was complex. I had to understand how Algorand stores data differently than traditional databases.

  2. Dual Wallet Context: Supporting both buyers and sellers with separate wallet instances in the same app required creative React context management to avoid conflicts.

  3. World ID Integration: Simulating World ID verification while maintaining the security model for the demo required careful implementation to show the value without live iris scanning.

  4. Chrome Extension Sync: Ensuring browsing data synced correctly between the extension and dashboard while respecting user privacy was technically challenging.

  5. Smart Contract Economics: Balancing transaction fees with micro-payments to ensure the model remains profitable for small data packages.

Accomplishments that I'm proud of

  • Built a WORKING prototype in 5 DAYS using Bolt that actually processes payments on Algorand testnet
  • Solved the dual-identity problem - users can seamlessly switch between being data sellers and buyers
  • Created fair economics - 90/10 split ensures users get the vast majority of value
  • Privacy-first design - data is anonymized and packaged, protecting user identity
  • Proved the concept - demonstrated that users CAN monetize their own data directly
  • Clean, intuitive UI - made blockchain accessible to non-technical users

What I learned

  1. Bolt is incredibly powerful - I built a complex full-stack dApp in 5 days that would normally take months
  2. Users care deeply about data ownership - the response to my concept has been overwhelmingly positive
  3. Blockchain enables new business models - smart contracts make fair, automatic revenue sharing possible
  4. The data economy is ready for disruption - current models are unsustainable and users are ready for change
  5. Simplicity wins - making Web3 accessible requires hiding complexity behind clean UIs

What's next for Cookie Market

Immediate (Post-Hackathon):

  • Launch on Algorand mainnet with real ALGO payments
  • Implement granular privacy controls (users choose exactly what to share)
  • Add more data categories and buyer use cases
  • Mobile app development for broader reach

Medium Term (3-6 months):

  • AI-powered insights to increase data value
  • Subscription tiers for consistent user income
  • B2B partnerships with ethical data buyers
  • Community governance for platform decisions

Long Term Vision:

  • Expand beyond browsing data to all personal data types
  • Build data unions for collective bargaining power
  • Create educational resources about data rights
  • Scale to 500,000+ users earning $2,000-$10,000 annually

My mission is simple: End digital sharecropping. Return data profits to the people who create the value. Cookie Market isn't just a hackathon project - it's the beginning of the biggest wealth transfer in internet history, from corporations back to people.

Your data has value. It's time you claimed it.

🧪 Testing Instructions

Prerequisites

Step 1: Login with World ID (Simulator)

  1. Visit https://peaceful-trifle-77ce75.netlify.app/
  2. Click "Verify with World ID to Login"
  3. When the World ID modal appears, click "Or, try the Simulator" at the bottom
  4. Use this pre-configured simulator link: https://simulator.worldcoin.org/
  5. Click "Log in" in the simulator
  6. You'll be redirected to the dashboard

Step 2: Install Chrome Extension

  1. Download the extension from the dashboard (or from this repo's /chrome-extension folder)
  2. Open Chrome and go to chrome://extensions/
  3. Enable "Developer mode" (top right)
  4. Click "Load unpacked"
  5. Select the downloaded extension folder
  6. The Cookie Market extension icon should appear in your toolbar

Step 3: Connect Seller Wallet (Dashboard)

  1. In the dashboard, click "Connect Pera Wallet"
  2. Scan the QR code with your Pera Wallet app
  3. Approve the connection
  4. Your wallet is now linked as a seller

Step 4: Collect Browsing Data

  1. Browse normally with the extension active
  2. Click the extension icon to see collected events
  3. Return to dashboard to see your data (may take 1-2 minutes to sync)

Step 5: Create Data Packages

  1. Once you have 10+ browsing events, click "Create Packages"
  2. The system automatically creates categorized packages (tech, shopping, etc.)
  3. Each package is priced in ALGO

Step 6: Test Marketplace Purchase

  1. Click "Visit Marketplace"
  2. To test as a buyer, click "Connect Buyer Wallet" (use a different Pera account)
  3. Browse available packages
  4. Click "Buy Now" on any package
  5. Confirm the transaction in Pera Wallet
  6. Watch the smart contract automatically split payment (90% seller, 10% platform)

Step 7: Withdraw Earnings

  1. Return to your dashboard
  2. Check your balance (should show earnings from sales)
  3. Click "Withdraw Earnings"
  4. Confirm in Pera Wallet
  5. ALGO transferred to your wallet!

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