anemo VS typed-protocols

Communication layer in Sui is based on anemo, a peer-to-peer networking library built on top of QUIC. QUIC is a modern higher-level network transport protocol layered over UDP. It has built-in support for encryption and multiplexing. Similar to TCP connections, QUIC streams are reliable, ordered, bidirectional, providing flow control (backpressure), but they are cheap and almost instantaneous to open once an initial connection is established. The anemo library takes advantage of the efficient stream-multiplexing capability of QUIC; libp2p also uses the built-in capabilities of QUIC when it is used as a transport mechanism.

Certain correctness properties of code can be ensured statically, i.e. at compile time. Those checks rely on the programming language's type system. Software engineers can take advantage of type safety features to implement components in a way that makes them safe by construction. For example, Cardano uses the typed-protocols package, a generic framework for implementing application-level protocols, which is based on a simple form of session typing.6 Within this framework, protocols are described as state machines encoded into Haskell types. The allowed transitions between states correspond to messages exchanged between the peers, so the protocol state determines which messages are allowed to be sent or must be accepted when received, at type level. This simplifies protocol implementation, allows early detection of protocol violations, and makes the protocols themselves deadlock-free by construction. More advanced type-level programming techniques may allow achieving impressive levels of type safety; however, such code may be significantly harder to implement, understand, and maintain.

I like to use typed-protocols for this: https://github.com/input-output-hk/typed-protocols/