The **spacecore-errors** package is a tiny Node .js library that centralizes a set of predefined error factories used by applications built on the Spacecore platform (e.g., storage, session, and blockchain‑related services). It exports ready‑to‑throw error functions such as `BAD_ARGUMENT`, `BLOCK_NOT_AVAILABLE`, and `WRITE_FAILED`, making error handling consistent for developers integrating Spacecore components.