/**
 * Quick function to convert a string to Base64, that works in both
 * Node and the browser
 *
 * @export
 * @param {string} str
 * @returns
 */
export declare function toBase64(str: string): string;
/**
 * Quick function to convert from Base64, works in both Node and browser.
 *
 * @export
 * @param {string} str
 * @returns
 */
export declare function fromBase64(str: string): string;