hashtree-ffi

UniFFI bindings for common hashtree attachment operations.

This crate exposes a small, FFI-friendly surface for:

• generating nhash identifiers from local files
• uploading attachments to Blossom-compatible servers
• downloading attachment bytes or writing them to disk

It is intended for mobile or native app shells that want Kotlin/Swift bindings without embedding the full hashtree CLI.

Part of hashtree.