type DisposeReason = "delete" | "set" | "evict" | "stale";
interface TTLCacheOptions<K, V> {
    max?: number;
    ttl?: number;
    updateAgeOnGet?: boolean;
    checkAgeOnGet?: boolean;
    noUpdateTTL?: boolean;
    onRemove?: (value: V, key: K, reason: DisposeReason) => void;
    skipRemoveOnSet?: boolean;
}
interface TTLCacheSetOptions {
    ttl?: number;
    noUpdateTTL?: boolean;
    skipRemoveOnSet?: boolean;
}
declare class TTLCache<K, V> {
    private expirations;
    private data;
    private expirationMap;
    private ttl;
    private max;
    private updateAgeOnGet;
    private checkAgeOnGet;
    private noUpdateTTL;
    private skipRemoveOnSet;
    private timer?;
    private timerExpiration?;
    handleRemoval(value: V, key: K, reason: DisposeReason): void;
    constructor(options?: TTLCacheOptions<K, V>);
    private setTimer;
    cancelTimer(): void;
    clear(): void;
    private setTTL;
    set(key: K, val: V, options?: TTLCacheSetOptions): this;
    has(key: K): boolean;
    getRemainingTTL(key: K): number;
    get(key: K, options?: {
        updateAgeOnGet?: boolean;
        ttl?: number;
        checkAgeOnGet?: boolean;
    }): V | undefined;
    delete(key: K): boolean;
    get size(): number;
    private removeKeys;
    private purgeToCapacity;
    purgeStale(): void;
    entries(): IterableIterator<[K, V]>;
    keys(): IterableIterator<K>;
    values(): IterableIterator<V>;
    [Symbol.iterator](): IterableIterator<[K, V]>;
}

export { TTLCache };