Attribute Macro endpoint 

#[endpoint]

Transforms a handler function into a NATS service endpoint.

Request Headers

• RoFr-Request-Id (optional) a unique identifier that the client generates to help trace requests.

#[endpoint(subject = "example")]
async fn example_endpoint(
    ctx: RequestContext<Self::Context>,
    /* ... */,
) -> Result<Response</* ... */, Error>;