import type { BytesLike } from "./data.js";
/**
 *  Decodes the base-64 encoded %%value%%.
 */
export declare function decodeBase64(value: string): Uint8Array;
/**
 *  Encodes %%data%% as a base-64 encoded string.
 */
export declare function encodeBase64(data: BytesLike): string;