Publish a message to a channel

The event name, if provided.

The string encoded payload, with the encoding specified below.

A Unique ID that can be specified by the publisher for idempotent publishing.

Timestamp when the message was received by the Ably, as milliseconds since the epoch.

This will typically be empty as all messages received from Ably are automatically decoded client-side using this value. However, if the message encoding cannot be processed, this attribute will contain the remaining transformations not applied to the data payload.

The client ID of the publisher of this message.

The connection ID of the publisher of this message.