import { BaseCacheProvider } from './base-cache.provider';
/**
 * CLS (Continuation Local Storage) cache provider
 *
 * This is the L1 cache layer - request-scoped caching using nestjs-cls.
 * Data stored here is only available within the same request context.
 *
 * Fastest cache layer but limited to single request lifecycle.
 */
export declare class ClsCacheProvider extends BaseCacheProvider {
    private static readonly CACHE_PREFIX;
    private static readonly KEYS_SET;
    private readonly logger;
    private clsUnavailableLogged;
    getName(): string;
    get<T>(key: string): Promise<T | null>;
    set<T>(key: string, value: T, ttl?: number): Promise<void>;
    delete(key: string | string[]): Promise<void>;
    deletePattern(pattern: string): Promise<number>;
    clear(): Promise<void>;
    has(key: string): Promise<boolean>;
    /**
     * Get full key with prefix
     */
    private getFullKey;
    /**
     * Add key to tracked keys set
     */
    private addKeyToSet;
    /**
     * Remove key from tracked keys set
     */
    private removeKeyFromSet;
    /**
     * Get all tracked keys
     */
    private getAllKeys;
    /**
     * Log CLS unavailability once to avoid spam
     * Only logs in development/test mode
     */
    private logClsUnavailableOnce;
}