RealFiNE - The On-chain Housing Vault Protocol

🏠 Deposit Today, Live Tomorrow - A revolutionary approach to housing access in Seoul

Overview

RealFiNE is an on-chain housing vault protocol that tokenizes Seoul's neighborhood-based housing subscription system. Instead of competing in lotteries with uncertain outcomes, users deposit stablecoins into dong-specific vaults, receive rent subsidies from DeFi yields, and gain priority access to housing projects.

-> Our white paper (en) (ko)

-> pitch deck

Key Innovation: Regional Vault System

Seoul has 426 administrative dongs (neighborhoods). Each dong gets its own dedicated vault:

- Deposits are stablecoin (USDT0) based

- 6% annual rent subsidy from DeFi yields

- Home Credits serve as DAO governance tokens

How It Works

RealFiNE Protocol

1. User deposits USDT0 → Receives Home Credit 1:1

2. While waiting: 6% annual rent subsidy

3. Points accumulate: Deposit × Time

4. When building completed: Points decide housing priority

Double Benefit Model

Yield Model: Rent Subsidy from DeFi

100M KRW Home Credit → 500K KRW/month rent subsidy (6% annual return)

Fund Portfolio Allocation:

Capital Flow:

- 6.0% → Rent subsidy to residents

- 0.5% → DAO reserve & operations

- 35% of TVL → Construction capital (via mETH 70% LTV collateral)

Home Credit is a fixed-income housing bond where 6% interest is paid as rent discount, and principal builds the city through DeFi leverage.

Architecture

Smart Contracts (Mantle Sepolia)

Tech Stack

- Blockchain: Mantle Network (L2)

- Smart Contracts: Solidity 0.8.28

- Frontend: Next.js 14, React 18, TypeScript

- Web3: wagmi, viem

- Styling: Tailwind CSS

- i18n: next-intl (Korean/English)

Project Structure

realfine-protocol/

├── contracts/ # Solidity smart contracts

│ ├── DongVault.sol

│ ├── DongVaultFactory.sol

│ ├── VToken.sol

│ ├── USDT0.sol

│ └── KYCRegistry.sol

│

├── cli/ # CLI deployment tools

│ ├── src/

│ │ ├── index.ts

│ │ ├── config.ts

│ │ ├── deployer.ts

│ │ └── commands/

│ └── package.json

│

├── shared/ # Shared configuration

│ └── dongs.ts

│

├── frontend/ # Next.js frontend

│ ├── src/

│ │ ├── app/

│ │ ├── components/

│ │ ├── hooks/

│ │ └── lib/wagmi/

│ └── package.json

│

└── deployed-addresses.json

Points System (Housing Priority)

When the building is completed, points determine unit selection order.

Points = Deposit Amount × (Days Held / 365)

Example

- Deposit: 100,000 USDT0

- Duration: 365 days (1 year)

- Points: 100,000 × 1 = 100,000 points

Higher points = Earlier unit selection when building is done.

Governance

Each Home Credit equals one vote in the DAO:

- Proposal Creation: Minimum 1,000 Home Credits

- Voting Period: 7 days

- Quorum: 10% of total Home Credit supply

- Execution: 48-hour timelock

Security

- ✅ KYC verification required for deposits

- ✅ Reentrancy protection on all state-changing functions

- ✅ Pausable contracts for emergency stops

- ✅ Factory pattern isolates risk per dong

Active Dongs

Roadmap

- [x] Phase 1: Core contracts & factory system

- [x] Phase 2: Frontend MVP with wallet integration

- [x] Phase 3: KYC flow implementation

- [ ] Phase 4: mETH yield integration

- [ ] Phase 5: Cross-vault bridge

- [ ] Phase 6: DAO governance launch

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"Many homes, our network, one giant block"