import type { ISyncDriver, TResourceOptions } from "../../../query/types/index.js";
import type { Resource } from "../resource/Resource.js";
export interface ISyncerConfig {
    syncDriver: ISyncDriver;
    keyPrefix: string | null;
    defaultSync: "none" | "resources" | "all";
    resourcesByKey: Map<string, Resource<any, any>>;
}
/**
 * Encapsulates cross-tab sync (REQ/RES) logic previously inlined in createApi.
 */
export declare class Syncer {
    private static readonly SYNC_TIMEOUT_MS;
    private readonly pendingRequests;
    private readonly syncDriver;
    private readonly keyPrefix;
    private readonly defaultSync;
    private readonly resourcesByKey;
    constructor(config: ISyncerConfig);
    /** Connect the sync driver and start listening for messages. */
    connect(): void;
    /** Create a beforeQuery hook for resource config. */
    get beforeQuery(): (resourceKey: string, entryKey: string) => Promise<{
        data: unknown;
    } | null>;
    /** Check whether sync is enabled for a given resource options. */
    isResourceSyncEnabled(opts: TResourceOptions<any, any>): boolean;
    /** Clear pending requests and reconnect the sync driver (used by resetAll). */
    cleanup(): void;
    private handleIncomingSyncMessage;
    private requestDataFromOtherTabs;
}