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- Introduced Ownable inheritance to manage ownership and access control.
- Added a whitelist mechanism allowing only approved addresses to deposit OKB.
- Implemented batch functions for adding and removing addresses from the whitelist.
- Updated deposit logic to enforce whitelisting and added error handling for zero addresses.
- Removed the ERC20Rescuer contract, consolidating rescue functionality within DepositedOKBAdapter.
- Cleaned up unnecessary errors and improved overall contract clarity and maintainability.

- Introduced a new error for transfer failures to improve error handling.
- Updated the constructor to transfer ownership to the specified owner after minting.
- Modified transfer functions to check for successful token transfers, reverting on failure.
- Improved overall contract robustness and clarity by handling potential transfer issues.

- Simplified the TransferNotAllowed error by removing parameters, enhancing clarity.
- Updated transfer functions to always revert with the new error format, ensuring consistent error handling.
- Improved code maintainability by reducing complexity in transfer logic.

- Introduced a new test suite for DepositedOKBAdapter, covering constructor validation, whitelist management, deposit functionality, transfer restrictions, and ERC20 rescue operations.
- Implemented mock contracts for testing, including MockOKB and MockOptimismPortal2, to simulate interactions and validate behavior.
- Enhanced test coverage to ensure robust error handling and correct functionality across various scenarios, including deposits by whitelisted users and handling of edge cases.
- Improved overall test structure for better maintainability and clarity.

- Eliminated the OKBBurner contract from the SetupCustomGasToken script, simplifying the deployment process.
- Updated the DepositedOKBAdapter deployment to handle OKB burning internally and added the deployer address to the whitelist.
- Enhanced configuration checks to verify adapter ownership and whitelist status, ensuring robust contract setup.