Worked on security hardening and test coverage improvements for L1 Contract Verification in the tokamak-network/tokamak-thanos repository. Focused on enforcing that only externally owned accounts can perform L1 verification, the developer refined Solidity-based security checks to block contract-based verification attempts. Expanded the test suite by introducing a helper contract scenario to ensure that contract-originated calls revert as expected, and updated error messaging for proxy admin verification failures to reflect accurate outcomes. This work, utilizing skills in Blockchain, Smart Contract Development, and Testing, reduced the risk of unauthorized contract interactions and improved the overall robustness of the verification process.