import { CacheOptions, CacheStats } from './types.js';
export interface TieredCacheOptions extends CacheOptions {
    useMemoryCache?: boolean;
    memoryMaxEntries?: number;
    memoryMaxAge?: number;
    memoryThreshold?: number;
    memorySizeCalculator?: (value: unknown) => number;
}
export declare class TieredCache<T> {
    private name;
    private fileCache;
    private memoryCache;
    private options;
    private stats;
    private static readonly DEFAULT_OPTIONS;
    constructor(options: TieredCacheOptions);
    private initializeMemoryCache;
    private shouldUseMemoryCache;
    init(): Promise<void>;
    get(key: string): Promise<T | undefined>;
    set(key: string, value: T, ttl?: number): Promise<void>;
    delete(key: string): Promise<void>;
    has(key: string): Promise<boolean>;
    clear(): Promise<void>;
    prune(): Promise<number>;
    getStats(): Promise<CacheStats>;
    close(): void;
}
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