Jinwoo worked on the chainapsis/keplr-wallet repository, focusing on foundational support for the Noble Dollar module. He established Protocol Buffer definitions to enable core financial operations and cross-chain capabilities, laying the groundwork for future interoperability. His approach centered on designing proto-level structures for transactions, queries, and genesis states, ensuring a consistent data model across chains. Jinwoo also refactored the yield claiming API, renaming and updating transaction types for clarity and maintainability. Using TypeScript, Protocol Buffers, and the Cosmos SDK, his work emphasized robust proto design and API stabilization, providing a solid technical base for Noble Dollar feature development.