Update docs

Signed-off-by: Denis Varlakov <denis@dfns.co>

README.md

@@ -35,7 +35,12 @@ the documentation of the protocol you're using), but usually they are:
 
 ## Features
 
-* `dev` enables development tools such as protocol simulation
+* `sim` enables protocol execution simulation, see `sim` module
+  * `sim-async` enables protocol execution simulation with tokio runtime, see `sim::async_env`
+    module
+* `state-machine` provides ability to carry out the protocol, defined as async function, via Sync
+   API, see `state_machine` module
+* `derive` is needed to use `ProtocolMessage` proc macro
 * `runtime-tokio` enables tokio-specific implementation of async runtime
 
 ## Join us in Discord!

round-based/Cargo.toml

@@ -41,7 +41,7 @@ rand_dev = "0.1"
 default = ["std"]
 state-machine = []
 sim = ["std", "state-machine"]
-sim-async = ["std", "tokio/sync", "tokio-stream", "futures-util/alloc"]
+sim-async = ["sim", "tokio/sync", "tokio-stream", "futures-util/alloc"]
 derive = ["round-based-derive"]
 runtime-tokio = ["tokio"]
 std = ["thiserror"]

round-based/src/lib.rs

@@ -35,7 +35,12 @@
 //!
 //! ## Features
 //!
-//! * `dev` enables development tools such as [protocol simulation](sim)
+//! * `sim` enables protocol execution simulation, see [`sim`] module
+//!   * `sim-async` enables protocol execution simulation with tokio runtime, see [`sim::async_env`]
+//!     module
+//! * `state-machine` provides ability to carry out the protocol, defined as async function, via Sync
+//!    API, see [`state_machine`] module
+//! * `derive` is needed to use [`ProtocolMessage`](macro@ProtocolMessage) proc macro
 //! * `runtime-tokio` enables [tokio]-specific implementation of [async runtime](runtime)
 //!
 //! ## Join us in Discord!

round-based/src/state_machine/mod.rs

@@ -4,6 +4,33 @@
 //! may not be possible/desirable to have async runtime which drives the futures until completion.
 //! For such use-cases, we provide [`wrap_protocol`] function that wraps an MPC protocol defined as
 //! async function and returns the [`StateMachine`] that exposes sync API to carry out the protocol.
+//!
+//! ## Example
+//! ```rust,no_run
+//! use round_based::{Mpc, PartyIndex};
+//!
+//! # type Result<T, E = ()> = std::result::Result<T, E>;
+//! # type Randomness = [u8; 32];
+//! # type Msg = ();
+//! // Any MPC protocol
+//! pub async fn protocol_of_random_generation<M>(
+//!     party: M,
+//!     i: PartyIndex,
+//!     n: u16
+//! ) -> Result<Randomness>
+//! where
+//!     M: Mpc<ProtocolMessage = Msg>
+//! {
+//!     // ...
+//! # todo!()
+//! }
+//!
+//! let state_machine = round_based::state_machine::wrap_protocol(
+//!     |party| protocol_of_random_generation(party, 0, 3)
+//! );
+//! // `state_machine` implements `round_based::state_machine::StateMachine` trait.
+//! // Its methods can be used to advance protocol until completion.
+//! ```
 
 mod delivery;
 mod noop_waker;