In this project video, I build a decentralized personal data vault where your data stays in your control with 100% end-to-end encryption. The whole idea is simple: instead of big tech stealing and selling user data, I show you how to let users upload documents, encrypt them (AES-256), store them on IPFS, and control access using Ethereum smart contracts. The tagline is exactly what the app does: own your data and monetize it—users can mark data public/private, grant access to companies, and earn commission when someone gets access. I walk you through the full product flow: wallet-based authentication with a zero-cost signing model (no transaction for login), a dashboard with files, access requests, logs, marketplace, bulk purchase, analytics, and enterprise-style API keys. You’ll see how users request access to encrypted files, how the uploader approves/rejects and even controls access duration, and how buyers can purchase data in bulk and export it (CSV/JSON) or pull it via API. I also break down the architecture and codebase structure (Next.js app routes, hooks, libs, contracts, encryption/IPFS packages, and Supabase for off-chain data), so you can test it as-is first, then customize safely.