export declare class CacheManager {
    data: Record<string, {
        data: unknown;
        expiredAt: number;
    } | null>;
    constructor({ checkPeriod, }?: {
        checkPeriod?: number;
    });
    set(key: string, data: unknown, ttl: number): Promise<void>;
    get<T>(key: string): Promise<T | null>;
}