import { type WebSocketAudience } from "./ws-audience";
export type WebSocketClusterEnvelope = {
    id: string;
    sourceNodeId: string;
    targetNodeIds?: string[];
    namespace?: string;
    audience: WebSocketAudience;
    event: string;
    data: unknown;
    emittedAt: number;
};
export type WebSocketClusterEnvelopeHandler = (envelope: WebSocketClusterEnvelope) => void | Promise<void>;
export interface WebSocketClusterBus {
    publish(envelope: WebSocketClusterEnvelope): void | Promise<void>;
    subscribe(handler: WebSocketClusterEnvelopeHandler): () => void;
    shutdown(): void | Promise<void>;
}
export declare class NoopWebSocketClusterBus implements WebSocketClusterBus {
    publish(_envelope: WebSocketClusterEnvelope): void;
    subscribe(_handler: WebSocketClusterEnvelopeHandler): () => void;
    shutdown(): void;
}
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