export declare const AlphaNum = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
export declare const Hex = "abcdef0123456789";
export declare function randomString(length?: number, characters?: string): string;
export declare function base64ToArrayBuffer(base64: string): ArrayBuffer;
export declare function arrayBufferToBase64(buffer: ArrayBuffer): string;