/**
 * Private helpers shared by the upload control and its selection preview.
 * Not re-exported from `index.tsx` — internal to the module.
 */
export declare function formatBytes(bytes: number): string;
/**
 * Identity key for a selected file: two picks of the same on-disk file produce
 * equal keys (name + size + mtime + type), two different files practically
 * never do. Used to skip duplicates in multi-select and as the stable list key.
 */
export declare function fileKey(file: File): string;
//# sourceMappingURL=shared.d.ts.map