Curb

I built Curb, a self-custodial spending vault on Monad. It enforces per-transaction limits, daily allowances, recipient cooldowns, protected liquid reserves, and delayed rule changes onchain. Funds above the reserve can also be delegated through Monad’s native staking precompile, while Scope displays wallet and vault staking positions in one control panel. Most crypto wallets are all-or-nothing: one phishing page, poisoned recipient address, or impulsive transaction can expose the entire balance. Curb limits the damage by placing enforceable boundaries around how funds can move—even if the interface interacting with the vault is compromised. I learned that meaningful wallet security must be enforced by the contract, not only presented as warnings in the frontend. I also learned how Monad’s native staking precompile handles delegation, unstaking, and rewards, and how important clear wallet, network, pending, rejected, and confirmation states are when designing a trustworthy onchain application.