interface LicenseInfo {
    valid: boolean;
    expiresAt?: string;
    licensedTo?: string;
    features?: string[];
    error?: string;
}
export declare class LicenseValidator {
    private static generateMachineId;
    private static getCacheKey;
    static validateLicense(licenseKey: string, nip: string): Promise<LicenseInfo>;
    static clearCache(): void;
}
export {};