v0.8.0

All capability providers (including portable WASI providers) are now required to respond to the operation OP_GET_CAPABILITY_DESCRIPTOR and return a messagepack-serialized struct containing metadata about the capability provider. This metadata includes:

• Name
• Documentation description
• Version (semver string) and Revision (monotonic)
• List of supported operations

We created a simple builder syntax that makes it easy and readable for capability providers to supply a capability descriptor:

/// Obtains the capability provider descriptor
fn get_descriptor(&self) -> Result<Vec<u8>, Box<dyn Error>> {
    Ok(serialize(
        CapabilityDescriptor::builder()
            .id(CAPABILITY_ID)
            .name("Default waSCC HTTP Server Provider (Actix)")
            .long_description("A fast, multi-threaded HTTP server for waSCC actors")
            .version(VERSION)
            .revision(REVISION)
            .with_operation(
                OP_HANDLE_REQUEST,
                OperationDirection::ToActor,
                "Delivers an HTTP request to an actor and expects an HTTP response in return",
            )
            .build(),
    )?)
}

NOTE - This is a breaking change, so old versions of capability providers will not work with this version of the waSCC host.