/**
 * Simple LRU (Least Recently Used) Cache implementation
 * Used for connection and config caching with size limits
 */
interface CacheEntry<T> {
    value: T;
    lastAccessed: number;
}
export declare class LRUCache<K, V> {
    private cache;
    private maxSize;
    private ttl?;
    constructor(maxSize?: number, ttl?: number);
    get(key: K): V | undefined;
    set(key: K, value: V): void;
    has(key: K): boolean;
    delete(key: K): boolean;
    clear(): void;
    size(): number;
    keys(): IterableIterator<K>;
    entries(): IterableIterator<[K, CacheEntry<V>]>;
    getEntry(key: K): CacheEntry<V> | undefined;
}
export {};