Module errors 

Controller result helpers: shortcuts for common success and error outcomes.

Okay builds 200 ServiceResult values, while the error types build ErrorResult values with fixed status codes. Return them directly from handlers, whose convention is Fn(CorrelationContext) returning Result<ServiceResult<T>, ErrorResult>.

async fn get_user(ctx: CorrelationContext) -> Result<ServiceResult<User>, ErrorResult> {
    Ok(Okay::result(user))
}

Structs

AuthenticationError

401 error shortcut: builds an ErrorResult for failed authentication.

AuthorizationError

403 error shortcut: builds an ErrorResult for denied authorization.

BadConfiguration

500 error shortcut: builds an ErrorResult for invalid server configuration.

GenericError

Custom-code error shortcut: builds an ErrorResult with a caller-chosen status.

Okay

Success-result shortcuts: builds 200 ServiceResult values for handlers.