export declare class GeneratorProvider {
    static uuid(): string;
    static fileName(ext: string): string;
    static getS3PublicUrl(key: string): string;
    static getS3Key(publicUrl: string): string;
    static generateVerificationCode(): string;
    static generatePassword(): string;
    /**
     * generate random string
     * @param length
     */
    static generateRandomString(length: number): string;
}