import { Key } from './models/key.model';
export declare class KeyCashService {
    private static keyService;
    private static keys;
    static init(): Promise<void>;
    static findAll(): Key[];
    static findById(_id: string): Key | null;
    static add(key: Key): Promise<boolean>;
    static update(key: Key): Promise<boolean>;
    static deleteById(_id: string): Promise<boolean>;
}