/**
 * Cache entry with metadata
 */
export interface CacheEntry<T = unknown> {
    /** Cached data */
    data: T;
    /** Timestamp when cached */
    timestamp: number;
    /** Time-to-live in milliseconds */
    ttl?: number;
    /** Size of entry in bytes (optional) */
    size?: number;
}
/**
 * Cache options
 */
export interface CacheOptions {
    /** Maximum number of items in cache */
    maxSize?: number;
    /** Default TTL in milliseconds */
    defaultTTL?: number;
    /** Enable debug logging */
    debug?: boolean;
}
/**
 * Cache statistics
 */
export interface CacheStats {
    /** Number of cache hits */
    hits: number;
    /** Number of cache misses */
    misses: number;
    /** Current cache size */
    size: number;
    /** Hit rate percentage */
    hitRate: number;
}
/**
 * Native module interface for disk cache
 */
export interface NativeCacheModule {
    /**
     * Get value from native cache
     * @param key - Cache key
     * @returns Cached data or null
     */
    getValue(key: string): Promise<string | null>;
    /**
     * Set value in native cache
     * @param key - Cache key
     * @param value - Value to cache (JSON string)
     * @param ttl - Time-to-live in milliseconds
     */
    setValue(key: string, value: string, ttl?: number): Promise<void>;
    /**
     * Remove value from native cache
     * @param key - Cache key
     */
    remove(key: string): Promise<void>;
    /**
     * Clear all cache entries
     */
    clear(): Promise<void>;
    /**
     * Get cache size in bytes
     */
    getSize(): Promise<number>;
    /**
     * Clear only memory cache (native layer)
     */
    clearMemoryCache(): Promise<boolean>;
    /**
     * Clear only disk cache (native layer)
     */
    clearDiskCache(): Promise<boolean>;
}
/**
 * Error types for cache operations
 */
export declare class CacheError extends Error {
    code: 'SERIALIZATION_ERROR' | 'NATIVE_ERROR' | 'STORAGE_ERROR' | 'INVALID_KEY' | 'MODULE_NOT_FOUND';
    details?: unknown | undefined;
    constructor(message: string, code: 'SERIALIZATION_ERROR' | 'NATIVE_ERROR' | 'STORAGE_ERROR' | 'INVALID_KEY' | 'MODULE_NOT_FOUND', details?: unknown | undefined);
}
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