package wasmcloud:messaging@0.2.0;

/// Types common to message broker interactions
interface types {
  /// A message sent to or received from a broker
  record broker-message {
    subject: string,
    body: list<u8>,
    reply-to: option<string>,
  }
}

interface handler {
  use types.{broker-message};

  /// Callback handled to invoke a function when a message is received from a subscription
  handle-message: func(msg: broker-message) -> result<_, string>;
}

interface consumer {
  use types.{broker-message};

  /// Perform a request operation on a subject
  request: func(subject: string, body: list<u8>, timeout-ms: u32) -> result<broker-message, string>;

  /// Publish a message to a subject without awaiting a response
  publish: func(msg: broker-message) -> result<_, string>;
}