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MedVault

Inspiration

Medical records are among the most sensitive forms of data, yet centralized storage systems remain vulnerable to breaches and misuse.
I wanted to build a solution where patients own their data, control access, and guarantee privacy by design using blockchain technology.

What it does

MedVault is a decentralized application (DApp) that enables patients to securely store and share encrypted medical records.

Patients upload their records, which are encrypted and stored on Midnight.
Doctors connect with patients through smart contracts acting as trust agreements.
Access is entirely patient-controlled, ensuring privacy and transparency.

How I built it

Frontend: React 18, TypeScript, Tailwind CSS, Vite, React Router, Hot Toast
Backend: Node.js, Express.js, TypeScript, SQLite, JWT, bcrypt
Blockchain & Privacy: Midnight SDK, Lace Wallet, Smart Contracts, End-to-End Encryption
Dev Tools: npm, ESLint, Prettier, Windsurf IDE with AI-powered development tools

Challenges I ran into

Integrating Midnight’s privacy-preserving features into a traditional web stack
Managing wallet addresses and transaction signing properly
Designing a clean workflow between patient signup, record storage, and doctor-patient smart contracts

Accomplishments that I'm proud of

Fully functional record upload with encryption and decentralized storage
Smart contract workflow enabling secure doctor-patient connections
Seamless use of a real Lace wallet for patient signup
Delivering a working prototype in a short time frame with a brand new tech stack

What I learned

Gained a deeper understanding of blockchain technology and its potential applications.
Explored Midnight’s capabilities and saw how it can simplify privacy-preserving workflows, even without leveraging all of its features yet.
Learned how to integrate decentralized technology into a modern web development stack.
Realized how powerful and transformative decentralization can be for real-world use cases.

What's next for MedVault

Enable individual Lace wallets for every doctor and patient.
Develop intelligent doctor matching based on patient history and doctor expertise.
Enhance privacy with ZK-SNARKs for medical data verification
Offer selective disclosure, giving patients granular control over shared data.
Apply data anonymization for safe research and analytics.
Launch mobile apps for iOS and Android.
Add telemedicine capabilities, integrating secure video consultations.