NOTICE

Copyright (2026) Databricks, Inc.

This Software includes software developed at Databricks (https://www.databricks.com/) and its use is subject to the included LICENSE file.

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This Software includes the following components:

## Rust Dependencies (via FFI)

This C++ SDK wraps the Zerobus Rust SDK via C FFI. The compiled native library includes the following open source components:

### MIT License

- **tokio**: Copyright (c) 2019 Tokio Contributors (https://github.com/tokio-rs/tokio)
- **tokio-stream**: Copyright (c) 2019 Tokio Contributors (https://github.com/tokio-rs/tokio)
- **tokio-util**: Copyright (c) 2019 Tokio Contributors (https://github.com/tokio-rs/tokio)
- **tonic**: Copyright (c) 2019 Lucio Franco (https://github.com/hyperium/tonic)
- **tracing**: Copyright (c) 2019 Tokio Contributors (https://github.com/tokio-rs/tracing)
- **async-trait**: Copyright (c) 2019 David Tolnay (https://github.com/dtolnay/async-trait)
- **thiserror**: Copyright (c) 2019 David Tolnay (https://github.com/dtolnay/thiserror)
- **serde**: Copyright (c) 2014 David Tolnay (https://github.com/serde-rs/serde)
- **serde_json**: Copyright (c) 2014 David Tolnay (https://github.com/serde-rs/json)
- **bytes**: Copyright (c) 2018 Carl Lerche (https://github.com/tokio-rs/bytes)
- **smallvec**: Copyright (c) 2018 The Servo Project Developers (https://github.com/servo/rust-smallvec)
- **once_cell**: Copyright (c) 2018 Aleksey Kladov (https://github.com/matklad/once_cell)
- **tokio-retry**: Copyright (c) 2018 Sam Rijs (https://github.com/srijs/rust-tokio-retry)
- **hyper-http-proxy**: Copyright (c) 2019 Trent Mick (https://github.com/tafia/hyper-http-proxy)
- **hyper-util**: Copyright (c) 2023 Sean McArthur (https://github.com/hyperium/hyper-util)

### Apache License 2.0

- **prost**: Copyright (c) 2017 Dan Burkert (https://github.com/tokio-rs/prost)
- **prost-types**: Copyright (c) 2017 Dan Burkert (https://github.com/tokio-rs/prost)
- **reqwest**: Copyright (c) 2016 Sean McArthur (https://github.com/seanmonstar/reqwest)
- **arrow-ipc**: Copyright (c) 2020 Apache Arrow contributors (https://github.com/apache/arrow-rs)

## C++ Dependencies

The C++ SDK itself pulls in no third-party C++ libraries: it uses only the C++ standard library and the Zerobus FFI's generated C header (`rust/ffi/zerobus.h`). It links the Zerobus Rust FFI static library (compiled from `rust/ffi/`), which transitively requires the platform's system libraries — `pthread`, `dl`, `m`, and `resolv` on Linux; the `CoreFoundation` and `Security` frameworks and `iconv` on macOS; and `ws2_32`, `userenv`, `bcrypt`, and `ntdll` on Windows.

For a complete list of Rust dependencies and their licenses, see the `../rust/sdk/Cargo.toml` and `../rust/ffi/Cargo.toml` files.