import { WritableSignal } from "@angular/core";
import { HttpQueryError, QueryFetchInit, QueryKey } from "./types";
export declare function isCacheEntryExpired(timestamp: number, ttl: number): boolean;
export declare function resolveQueryKey(key: QueryKey): {
    cacheKey: string;
    url: string;
};
export type QueryFetchHandlers<T> = {
    fetchData(force?: boolean): Promise<void>;
    invalidate(): void;
};
export type CreateQueryFetchOptions<T> = {
    data: WritableSignal<T | null>;
    loading: WritableSignal<boolean>;
    error: WritableSignal<HttpQueryError | null>;
    getActiveKey: () => {
        cacheKey: string;
        url: string;
    };
    canUpdateLocal: (requestCacheKey: string) => boolean;
    ttl: number;
    staleWhileRevalidate: boolean;
    fetchInit: QueryFetchInit;
    fetchFn: typeof fetch;
};
export declare function createQueryFetchHandlers<T>(options: CreateQueryFetchOptions<T>): QueryFetchHandlers<T>;