Review and test a smart contract codebase before it is submitted for formal security review. The work should identify logic risks, edge cases, access-control concerns, and test gaps. This project is for preparation and testing; findings must be documented carefully and should not be presented as a guarantee of security. The successful freelancer will be expected to work independently, share progress at agreed checkpoints, and raise questions early when a requirement needs clarification. All submitted work should be original, well organized, and ready for practical use after reasonable review.