import { Cache } from '@nestjs/cache-manager';
import { CacheServicePort } from '../../domain/ports';
/**
 * Generic cache service implementation using NestJS CacheManager.
 * Supports basic operations like get, set, delete, and clear.
 */
export declare class CacheService implements CacheServicePort {
    private readonly cache;
    private readonly logger;
    constructor(cache: Cache);
    /**
     * Retrieves a value from the cache by key.
     *
     * @param key The key to retrieve the value for.
     * @returns The parsed value, or null if not found.
     */
    get<T>(key: string): Promise<T | undefined>;
    /**
     * Stores a value in the cache under the specified key.
     *
     * @param key The key under which to store the value.
     * @param value The value to store.
     * @param ttl Optional time to live (expiration) in seconds.
     */
    set<T>(key: string, value: T, ttl?: number): Promise<void>;
    /**
     * Deletes a value from the cache by key.
     *
     * @param key The key of the value to delete.
     */
    del(key: string): Promise<void>;
    /**
     * Clears the entire cache.
     */
    reset(): Promise<void>;
}
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