Worked on the paritytech/polkadot-sdk repository to enhance runtime safety by extending the TypeWithDefault utility to support a wider range of integer types, including u8, u16, u32, u64, and u128. This update addressed a compile-time compatibility issue with the BaseArithmetic trait, which previously limited replay-attack prevention workflows in runtime development. The solution involved careful use of Rust macros and type system features to ensure broader configurability and safer defaults across different runtime configurations. The work focused on improving integration and reducing friction for developers, ultimately enabling more robust and flexible runtime development within the Rust ecosystem.