/**
 * Least Recently Used (LRU) cache with TTL support
 * Prevents unbounded memory growth by evicting least-recently-used items
 * when capacity is reached
 */
export declare class LRUCache<K, V> {
    private readonly maxSize;
    private readonly ttlMs;
    private readonly cache;
    constructor(maxSize: number, ttlMs: number);
    /**
     * Get a value from the cache
     * Returns undefined if key is not found or has expired
     */
    get(key: K): V | undefined;
    /**
     * Set a value in the cache
     * Evicts LRU item if at capacity
     */
    set(key: K, value: V): void;
    /**
     * Evict the least recently used item
     */
    private evictLRU;
    /**
     * Clear all entries from the cache
     */
    clear(): void;
    /**
     * Get current cache size
     */
    size(): number;
    /**
     * Get cache statistics for monitoring
     */
    getStats(): {
        size: number;
        maxSize: number;
        ttlMs: number;
    };
}
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