import BaseLruCache from "lru-cache";
export type CacheOptions<V> = BaseLruCache.Options<string, V> & {
    name: string;
    fastStringify?: boolean;
};
export declare class LruCache<K, V> {
    private options;
    private cache;
    private stringify;
    constructor(options: CacheOptions<V>);
    set(key: K, value: V, ttl?: number): void;
    get(key: K): V | undefined;
    delete(key: K): void;
    peek(key: K): V | undefined;
    size(): number;
    clear(): void;
    forEach(callback: (value: V) => void): void;
    purgeStale(): boolean;
    private updateStats;
}