Use named mappings
Consider moving to solidity version 0.8.18 or later, and using named mappings to make it easier to understand the purpose of each mapping',
Link to code - https://github.com/Cyfrin/2023-07-beedle/tree/main/src/Lender.sol
Link to code - https://github.com/Cyfrin/2023-07-beedle/tree/main/src/Staking.sol
Manual Code Review by SolSaver
Use named mappings
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