FinTech

DeFi Lending Protocol: $5M TVL at Launch, Zero Exploits

A crypto startup needed a DeFi lending protocol built to production security standards. We identified three whitepaper attack vectors before writing a single line of…

🏢 Liquidity Labs 📍 Global ⏱ 6 months
$5M
TVL at launch
120K+
Transactions

""Key Brains identified three attack vectors in our whitepaper design before we even signed the contract." — Alex Park, Founder"

The Challenge

The founders had $4M in seed funding, a strong whitepaper, and a compliance deadline — but no smart contract engineers. One vulnerability could permanently destroy all deposited capital.

Our Approach

We began with threat modelling, not a code editor. Three attack vectors in the whitepaper design were identified and resolved architecturally before coding began.

  • 2,000+ test cases with Foundry fuzz testing
  • Chainlink TWAP oracle with 5% circuit breaker against price manipulation
  • Dutch auction liquidation mechanism to minimise protocol bad debt
  • OpenZeppelin Governor DAO with 48-hour timelock on all parameter changes

Results

Two external audits — all 23 findings resolved before mainnet. 120,000+ transactions since March 2024 launch with zero security incidents.

Technologies Used

Solidity Hardhat Foundry Chainlink The Graph React.js Ethers.js