import type { ImportDiagnostic, RiveDocument } from '@flighthq/types/contract';
/**
 * Decodes the `.riv` container into its header and flat core-object stream. This is the format's
 * bedrock layer and performs no interpretation: type keys and property keys stay numeric, and
 * building artboards, shapes, or animations out of them belongs to later stages.
 *
 * Returns null for a file that cannot be traversed, which includes the one case the format itself
 * cannot recover from — a property key whose width is declared neither by the reader nor by the
 * file's own table of contents, after which the byte position is no longer known.
 */
export declare function parseRiveDocument(source: Readonly<Uint8Array>, diagnostics?: ImportDiagnostic[]): RiveDocument | null;
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