This Solidity smart contract rewards users for logging in daily. It keeps track of when each user last logged in and ensures they can only claim a reward once every 24 hours. The contract uses a mappi
This Solidity smart contract rewards users for logging in daily. It keeps track of when each user last logged in and ensures they can only claim a reward once every 24 hours. The contract uses a mapping to store timestamps for each user's login and another mapping to track their earned rewards.