🏠 BrickChain – Tokenization dApp

Vision

Buying and selling property today is slow, paperwork-heavy, and dependent on multiple middlemen. BrickChain reimagines real estate as digital, fractional tokens — making property trading as simple as sending crypto.

• Fractional Ownership → Anyone can invest in property shares.
• Private Transfers → Shielded transactions ensure balances stay hidden.
• Verifiable Proofs → Zero-knowledge cryptography binds ownership to wallets, without exposing sensitive documents.

With Midnight, we balance privacy, compliance, and simplicity — laying the foundation for a global property marketplace.

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🔑 How We Use Midnight

• Zero-Knowledge Proofs (ZKPs): Owners prove legitimacy without revealing full registry data.
• Shielded Transactions: Property fractions (tokens) can be exchanged privately.
• Selective Disclosure: Owners show regulators only the proofs they choose (e.g., “I own 20% of Property123”).

👉 Midnight = privacy-first property trading.

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🧩 Flow

1. Register Property → Upload doc → hash stored on-chain → ZK proof links wallet to property.
2. Tokenize Assets → Smart contract mints fractional tokens → 100% allocated to owner.
3. Transfer Ownership → Shielded transfer sends tokens privately to buyers.
4. Verify Ownership → ZK proof confirms % ownership, without exposing other holdings.

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⚙️ Tech Stack

• Smart Contracts: Midnight Compact (TypeScript DSL)
• ZK Proofs: Midnight-primitives
• Frontend: React + Midnight.js SDK
• Backend: Node.js/Express (for API wrappers)
• Storage: IPFS / local DB (demo only)
• Hashing: SHA-256

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💡 Why It Works

• Property becomes liquid, tradable, and accessible.
• Small investors can buy fractions of real estate.
• Privacy + compliance ensured through ZKPs and selective disclosure.

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😤 Challenges We Faced

• New DSL Struggles: Midnight’s Compact language was exciting but tough — limited docs meant lots of trial and error.
• Folder Structure Chaos: Getting contracts, frontend, and backend aligned properly took multiple refactors.
• Learning Curve: Entering a domain-specific blockchain + ZKP world from scratch was steep, but rewarding.

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🏗 What We Built

Not just a demo — we built a full-fledged dApp:

• Upload property docs → hash + register.
• Mint and allocate tokens as property shares.
• Private transfers via shielded contracts.
• On-demand ZK ownership proofs.

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🎯 Final Pitch

BrickChain makes real estate trading fast, private, and verifiable. With Midnight, we bring privacy-first tokenization — creating a future where buying and selling property is as seamless as sending tokens.

Built With

• docker
• javascript
• midnight-compact
• midnight-primitives
• midnight.js
• node.js
• react
• typescript