export interface ICache {
    set<T>(key: string, value: T, ttl: number): boolean;
    get<T>(key: string): T | undefined;
    has(key: string): boolean;
    del(key: string): number;
    ttl(key: string, ttl: number): boolean;
}
export declare class MemoryCache implements ICache {
    set<T>(key: string, value: T, ttl: number): boolean;
    get<T>(key: string): T | undefined;
    has(key: string): boolean;
    del(key: string): number;
    ttl(key: string, ttl: number): boolean;
}