Interface RelayEnvelope<T>

Wire envelope encoded inside each datagram payload (after the server's 4-byte sender-session-ID prefix).

interface RelayEnvelope<T = unknown> {
    messageId: string;
    payload: T;
    timestamp: number;
    topic: string;
    userId: string;
}

Properties

messageId: string

Per-message identifier for idempotent delivery.

payload: T

App-level data.

timestamp: number

Sender-side ms timestamp, used for best-effort ordering checks.

topic: string

App-level routing key — subscribers register against a topic.

userId: string

Sender's app-level identity. Duplicated in every envelope.