/**
 * PubSubWaiter - Integrates pub/sub notifications into retry loops.
 *
 * When pub/sub is enabled, waits for a release notification instead of
 * a fixed timer delay. Falls back to timer delay if pub/sub is not available.
 */
import { PubSubManager } from "./pubsub-manager";
export type WaitResult = "notified" | "timeout" | "fallback";
export declare class PubSubWaiter {
    private readonly pubSubManager;
    private readonly keyPrefix;
    constructor(pubSubManager: PubSubManager | null, keyPrefix: string);
    /**
     * Wait for a resource to become available.
     * Uses pub/sub if available, otherwise falls back to timer delay.
     */
    waitForRelease(resourceType: "lock" | "sem" | "latch", resource: string, maxWaitMs: number, fallbackDelayMs: number): Promise<WaitResult>;
    /** Build a notification channel name */
    getChannel(resourceType: "lock" | "sem" | "latch", resource: string): string;
}
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