import { BoardScene } from './types.js';

declare const PAYLOAD_MIME = "application/vnd.moraya-board+json";
/** scene → base64(deflate(JSON)) */
declare function encodeScenePayload(scene: BoardScene): string;
/** Inverse of {@link encodeScenePayload}. Throws on malformed input. */
declare function decodeScenePayload(payload: string): BoardScene;
/** The <metadata> block embedded into an exported `.mboard.svg`. */
declare function sceneMetadataBlock(scene: BoardScene): string;
/**
 * Recover the scene from `.mboard.svg` text. Returns null when the file has
 * no payload (e.g. metadata stripped by an SVG optimizer) or the payload is
 * corrupt — callers show the "view-only, scene data lost" fallback.
 */
declare function extractSceneFromSvg(svgText: string): BoardScene | null;

export { PAYLOAD_MIME, decodeScenePayload, encodeScenePayload, extractSceneFromSvg, sceneMetadataBlock };