Streakchain

StreakChain is an onchain habit tracker on Monad testnet. I struggle to stick to a daily work habit, and it's easy to quietly give up when the only record of a streak lives in your own head. StreakChain solves this with two contracts: StreakChain.sol logs free daily check-ins as a public, timestamped, tamper-proof record tied to your wallet. StreakStake.sol goes further — you stake real MON on a streak goal, forfeit it if you miss a day, and get your stake back plus a bonus if you finish, funded entirely by other people's forfeited stakes. It's a self-funding commitment device: discipline is literally paid for by other people's lack of it. The app also has a public streak lookup (view anyone's streak with no wallet needed) and a daily task list where each completed task logs a real onchain check-in. StreakStake has a full Hardhat test suite (29 tests), including a dedicated reentrancy-attack test proving the payout logic is safe. This was my first time writing and deploying a smart contract — I learned Solidity, how to reason about contract security (checks-effects-interactions, why payouts must be capped), and why Monad's low gas/high throughput is what makes frequent small onchain writes like this actually practical.