Mini DeFi Bank Update
Today I reviewed and upgraded my contract found flaws, patched ‘em, learned a lot.

🧠 Lessons + Fixes:

✅ Tracked direct ETH in receive() with an event log (didn’t even know I could tbh)

✅ Removed redundant require() in withdraw() (gas savings > over-checking)

✅ Added 24hr cooldown per withdrawal

✅ Built 10% annual interest logic primary school math finally paid off 😅


Next:

🎯 .reset() function for test mode

🎯 Testnet deploy this weekend 🧪


How would you test a Defi Bank contract?

#Solidity #DeFi #SmartContracts #OpenZeppelin #BuilderJourney #MiniDeFiBank #Web3Dev

🛡️ Building a Mini DeFi Bank with a couple of security upgrades.

Was using CEI, but I layered in:

✅ ReentrancyGuard (to block recursive withdraws)

✅ Pausable (for emergency stops)

✅ Ownable (so only admin controls pause/unpause)

✅ Custom modifiers + events for clean traceability


Got stuck at first importing Ownable — forgot that newer OZ versions require initialOwner in the constructor. Easy fix once I caught it.

Security isn’t optional.
Cooldown logic + interest counter drops tomorrow.

#solidity #defi #openzeppelin #smartcontracts

Solidity dev | Web3 learner | Building Meaningful Tech

Codegobli

@codegobli