uniffi-rs is a Rust FFI binding generator and multi-language binding tool. It functions as an automated binding scaffolder that creates type-safe foreign function interfaces and native wrappers for Rust libraries in languages such as Swift, Kotlin, and Python.
The project provides a system for cross-language interface definition, allowing functions and data structures to be specified in a shared format to ensure consistent API signatures across platforms. It further serves as an FFI memory management layer, handling object lifetimes and thread safety when sharing state between Rust and foreign language runtimes.
The tool covers broad capability areas including API integration for mapping internal data structures to foreign classes and the automation of binding generation during the build process. It supports the development of multi-platform SDKs by managing the transfer of data, the mapping of errors to native exceptions, and the execution of asynchronous functions across language boundaries.
