import * as i0 from "@angular/core";
export declare enum CacheKeys {
    INSTRUCTIONS_SHOWN = "instructions_shown"
}
export declare class AmplifyCacheService {
    constructor();
    /**
     * Puts item in cache under a key
     * @param key : string. Key for lookup.
     * @param value : Iem to put (number, string, boolean, array or object)
     * @param expires : number. Time in future in milliseconds Date.getTime()
     * @param priority : number from 0 to 5. the cached item with the higher number will be expired first.
     */
    putInCache(key: string, value: any, expires?: number, priority?: number): void;
    /**
     * Retrieves an item from the cache. It will return null if the item doesn’t exist or it has expired.
     * @param key string. Lookup key.
     * @returns any or null if nothing found.
     */
    getFromCache(key: string): any;
    /**
     * Removes item from cache.
     * @param key string. Key to remove.
     */
    removeFromCache(key: string): void;
    /**
     * Removes all of the items in the cache.
     */
    clearCache(): void;
    /**
     * Returns all of the keys available in the cache.
     * @returns string[]
     */
    getAllKeys(): string[] | Promise<string[]>;
    static ɵfac: i0.ɵɵFactoryDeclaration<AmplifyCacheService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AmplifyCacheService>;
}