/**
 * Byte-range reader backed by a Blob.
 *
 * Works for both browser `File` objects (drag-and-drop) and `fetch()`
 * responses materialised via `await response.blob()`. Reads return
 * `Uint8Array` — the underlying ArrayBuffer is owned by the caller and
 * safe to transfer across postMessage boundaries.
 */
export declare class BlobByteSource {
    private readonly blob;
    constructor(blob: Blob);
    get size(): number;
    read(start: number, end: number): Promise<Uint8Array>;
}
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