Made of little things.

/**
 * The client's link to a world. Replaces the original WebSocket: the world may
 * run in this tab (solo, or when this tab hosts the shard) or on a peer over
 * NAP-WEBRTC. Messages are the original BrowserQuest JSON arrays.
 */
export interface TransportHandlers {
  /** The world accepted the connection (the original server's "go"). */
  onReady(): void;
  /** One message or a batch (array of messages), as the original server sent. */
  onMessage(data: unknown): void;
  onClose(reason: string): void;
}

export interface Transport {
  connect(handlers: TransportHandlers): void;
  send(message: unknown[]): void;
  close(): void;
}