export declare type Ascii85Standard = "Adobe" | "btoa" | "RFC 1924" | "Z85";
/**
 * encoding/decoding options
 * @property standard - characterset and delimiter (if supported and used). Defaults to Adobe
 * @property delimiter - whether to use a delimiter (if supported) - "<~" and "~>" by default
 */
export interface Ascii85Options {
    standard?: Ascii85Standard;
    delimiter?: boolean;
}
/**
 * Encodes a given Uint8Array into ascii85, supports multiple standards
 * @param uint8 input to encode
 * @param [options] encoding options
 * @param [options.standard=Adobe] encoding standard (Adobe, btoa, RFC 1924 or Z85)
 * @param [options.delimiter] whether to use a delimiter, if supported by encoding standard
 */
export declare function encode(uint8: Uint8Array, options?: Ascii85Options): string;
/**
 * Decodes a given ascii85 encoded string.
 * @param ascii85 input to decode
 * @param [options] decoding options
 * @param [options.standard=Adobe] encoding standard used in the input string (Adobe, btoa, RFC 1924 or Z85)
 */
export declare function decode(ascii85: string, options?: Ascii85Options): Uint8Array;