spin-mqtt.wit

// WIT design guidelines https://github.com/WebAssembly/component-model/blob/main/design/mvp/WIT.md
// https://component-model.bytecodealliance.org/design/wit.html
package spin:mqtt-trigger;

interface spin-mqtt-types {
  /// General purpose error.
  variant error {
      other(string),
  }

  /// MQTT QoS levels.
  enum qos {
      at-most-once,
      at-least-once,
      exactly-once,
  }

  // metadata associated with the payload
  record metadata {
        topic: string,
  }

  /// The message payload.
  type payload = list<u8>;
}

world spin-mqtt {
  use spin-mqtt-types.{error, metadata, payload};

  /// The entrypoint for a Mqtt handler in wasm component  
  export handle-message: func(message: payload, metadata: metadata) -> result<_, error>;
}

world spin-mqtt-sdk {
  import spin-mqtt-types;
}