Worked on the scroll-tech/reth repository to enhance the accuracy of genesis header construction for blockchain node initialization. Focused on the withdrawals root calculation, the developer addressed a bug by filtering out zero storage values during genesis block generation, ensuring the computed storage root reflects only meaningful data. This fix, implemented in Rust, included the addition of regression tests to prevent future errors and maintain historical data integrity. The work involved refactoring the genesis header generation logic for improved clarity and maintainability, expanding test coverage, and applying blockchain development best practices to support reliable node bootstrapping and ongoing correctness of the protocol.