/**
 * Simple in-memory cache with TTL support
 */
export declare class Cache {
    private store;
    private defaultTTL;
    constructor(defaultTTL?: number);
    /**
     * Generate cache key from parts
     */
    generateKey(...parts: (string | number | undefined)[]): string;
    /**
     * Get value from cache
     */
    get<T>(key: string): T | null;
    /**
     * Set value in cache
     */
    set<T>(key: string, value: T, ttl?: number): void;
    /**
     * Check if key exists and is valid
     */
    has(key: string): boolean;
    /**
     * Delete specific key
     */
    delete(key: string): boolean;
    /**
     * Delete all keys matching pattern
     */
    deletePattern(pattern: string): number;
    /**
     * Clear entire cache
     */
    clear(): void;
    /**
     * Clean up expired entries
     */
    private cleanup;
    /**
     * Get cache stats
     */
    getStats(): {
        size: number;
        hits: number;
        misses: number;
    };
    /**
     * Get or set with factory function
     */
    getOrSet<T>(key: string, factory: () => Promise<T>, ttl?: number): Promise<T>;
}
export declare const cache: Cache;
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