During November 2024, Linsheng Yu focused on security hardening and stability improvements for the okx/xlayer-erigon repository. Addressing a critical vulnerability, he disabled the RPC cache service and removed associated caching logic, effectively reducing the attack surface while maintaining essential RPC operations. His work involved backend development in Go, with a strong emphasis on security and caching mechanisms. By isolating all changes within a single commit, Linsheng ensured the update could be easily audited or rolled back if necessary. This targeted bug fix demonstrated depth in understanding both the system’s architecture and the security implications of caching in distributed systems.