import { Nillable } from './types';
export declare namespace Cache {
    /**
     * Create a new TTL cache that proactively checks for expired items at regular intervals (defined by cleanupIntervalSeconds).
        * @param ttlSeconds - Time to live for each cache entry in seconds. If none is specified, it defaults to 10 minutes.
        * @param cleanupIntervalSeconds - Interval in seconds between each cleanup run. If not set, it defaults to 60 seconds. If set to -1, the cache will run in passive mode and only check for expired items when get() is called.
        * @returns Cache<T>
    */
    function active<T>(ttlSeconds?: number, cleanupIntervalSeconds?: number): Cache<T>;
    /**
     * Create a new TTL cache that only checks for expired items when get() is called.
     * @param ttlSeconds - Time to live for each cache entry in seconds. If none is specified, it defaults to 10 minutes.
     * @returns Cache<T>
    */
    function passive<T>(ttlSeconds?: number): Cache<T>;
}
export interface Cache<T> {
    get(k: string): Nillable<T>;
    set(k: string, v: T): void;
    shutdown(): void;
}