Raw messages (packages) received on a topic. Opened with
`SubscribeToPackages(topicName)`; the server pushes `PackageReceived`
events. Closed with `UnsubscribeFromPackages(topicName)`.
Client-to-server SignalR invocation to subscribe to raw packages.
Content-Type: application/json
PackageReceived
A raw message received on the topic.
Content-Type: application/json
About AsyncAPI
The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.
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