Worked on enhancing blockchain connectivity and configuration management across the wevm/viem and argotorg/sourcify repositories. Addressed Jovay chain connectivity by updating default RPC endpoints and block explorer URLs in viem, ensuring reliable access to active network resources and reducing misrouting risks. In sourcify, added support for Jovay Sepolia Testnet and Mainnet, implemented new chain configurations, and expanded test coverage to improve deployment confidence. Removed outdated RPC references and applied lint fixes to maintain code quality. Utilized TypeScript, JSON, and blockchain development skills to deliver targeted improvements that stabilized multi-chain support and streamlined future network expansion and maintenance.