CheCko is a decentralized wallet login system developed by ResPeer for the Linera ecosystem. By separating the wallet client from the Linera Node Service, it enhances system stability and scalability. Unlike the official wallet architecture, CheCko offloads block execution to the Node Service, allowing the wallet client to manage private keys locally. This design avoids potential data loss caused by excessive browser storage and supports long-term microchain growth. CheCko also offers Microchain-as-a-Service, enabling other Linera applications to simplify development and build more stable Web3 services.