Worked on the kaiachain/kaia repository to address a critical issue affecting the reliability of staking rewards processing. Focused on backend development using Go, the work involved fixing error handling for the klay_getRewards RPC, which previously suffered from incorrect error wrapping and upstream redirection problems. By enhancing error-wrapping consistency and improving the accuracy of state-fetch operations, the changes reduced diagnostic time and minimized the risk of future failures. This targeted bug fix contributed to a more robust staking module, ensuring more stable rewards distribution and increasing trust in the staking workflow. The work emphasized error handling and backend reliability.