Update the async IO interface to match the std version

justfile

@@ -42,8 +42,8 @@ _default:
 # Test feature flag matrix compatability.
 @_test-features:
   # Build and test with all features, no features, and some combinations if required.
-  cargo +{{STABLE_TOOLCHAIN}} test --package bip324 --lib --all-features
-  cargo +{{STABLE_TOOLCHAIN}} test --package bip324 --lib --no-default-features
+  cargo +{{STABLE_TOOLCHAIN}} test --package bip324 --lib --tests --all-features
+  cargo +{{STABLE_TOOLCHAIN}} test --package bip324 --lib --tests --no-default-features
 
 # Check code with MSRV compiler.
 @_test-msrv:

protocol/Cargo.toml

@@ -30,3 +30,4 @@ chacha20-poly1305 = { version = "0.1.1", default-features = false }
 # bitcoind version 26.0 includes support for BIP-324's V2 protocol, but it is disabled by default.
 bitcoind = { package = "corepc-node", version = "0.7.1", default-features = false, features = ["26_0","download"] }
 hex = { package = "hex-conservative", version = "0.2.0" }
+tokio = { version = "1", features = ["io-util", "net", "rt-multi-thread", "macros"] }

protocol/README.md

@@ -1,17 +1,16 @@
-# Protocol
+# BIP-324 Protocol
 
 A BIP-324 library to establish and communicate over an encrypted channel.
 
-The library is designed with a bare `no_std` and "Sans I/O" interface to keep it as agnostic as possible to application runtimes, but higher level interfaces are exposed for ease of use.
+The library is designed with a bare `no_std` and *Sans I/O* interface to keep it as agnostic as possible to application runtimes, but higher level interfaces are exposed for ease of use.
 
-The `tokio` feature includes the high-level `AsyncProcotol` type which helps create and manage an encrypted channel. 
-
-The lower-level `CipherSession` and `Handshake` types can be directly used by applications which require more control. The handshake performs the one-and-a-half round trip dance between the peers in order to generate secret materials and verify a channel. A successful handshake results in a cipher session which performs the encrypt and decrypt operations for the lifetime of the channel.
+* **High-level I/O** - `io::Protocol` (sync) and `futures::Protocol` (async) handle the complete encrypted connection lifecycle including handshake, writes, and reads.
+* **Low-level components** - For applications requiring more control, `Handshake` is a type-safe state machine for the handshake protocol and `CipherSession` manages encryption/decryption after the handshake.
 
 ## Feature Flags
 
-* `std` -- Standard library dependencies for I/O, memory allocation, and random number generators.
-* `tokio` -- High level I/O wrappers for asynchronous tokio runtime.
+* `std` - Standard library dependencies for I/O, memory allocation, and random number generators.
+* `tokio` - High level I/O wrappers for the asynchronous tokio runtime.
 
 ## Minimum Supported Rust Version (MSRV)