BBourdillioninbourdillion.hashnode.dev·Dec 16, 2025 · 8 min readHow Aave Uses the Binomial Theorem to Calculate Compound InterestIf you are wasted like me, and just jump around all day from repo to repo, flashing through top defi to understand their tek, you have probably come across this function from Aave v3; MathUtils.sol:calculateCompoundedInterest function calculateComp...00
BBourdillioninbourdillion.hashnode.dev·Dec 10, 2025 · 4 min readWeb3 Security Bug Deep Dive #4 - CapMoney Liquidation TrapSince CapMoney is a lending and borrowing platform, like every other similar protocol, have a way to liquidate defaulting borrowers, that is, those who have unhealthy collateral value backing their borrowed amount. Now in other to incentivize these l...00
BBourdillioninbourdillion.hashnode.dev·Dec 7, 2025 · 5 min readWeb3 Security Bug Deep Dive #2 - CapMoney Fee GamingCapMoney has a fee system that discourage depositors from depositing large amount into a particular asset, so as to maintain balanced asset allocations across the protocol. The idea is simple: if one asset becomes too dominant in the pool (say USDT g...01U
BBourdillioninbourdillion.hashnode.dev·Dec 6, 2025 · 3 min readWeb3 Security Bug Deep Dive #2 - CapMoney's Zero Interest Rate BugCapMoney has interest rate models for their lending vaults. The interest rate is supposed to adjust based on utilization, if 90% of the vault is borrowed, rates should be high to discourage more borrowing and incentivize repayment. If only 20% is bor...00
BBourdillioninbourdillion.hashnode.dev·Dec 5, 2025 · 2 min readWeb3 Security Bug Deep Dive #1 - CapMoneyCapMoney, just like Aave, is a lending/borrowing protocol. Just like every other similar protocol, when an asset is paused, deposits, withdrawals, and borrowing are blocked, but liquidations and repayments should remain open. Now the problem is that ...01U
