/**
 * Converts base64 string back into original text
 */
declare function atob(base64: string): string;

/**
 * Converts base64url string back into original text
 */
declare function atobu(base64: string): string;

/**
 * Converts text into base64 string
 */
declare function btoa(text: string): string;

/**
 * Converts text into base64url string
 */
declare function btoau(text: string): string;

export { atob, atobu, btoa, btoau };