import type { FilehandleOptions, GenericFilehandle, ReadFileOptions, ReadFileTextOptions, Stats } from './filehandle.ts';
/**
 * Blob of binary data fetched from a local file (with FileReader).
 *
 * Adapted by Robert Buels and Garrett Stevens from the BlobFetchable object in
 * the Dalliance Genome Explorer, which is copyright Thomas Down 2006-2011.
 */
export default class BlobFile implements GenericFilehandle {
    /**
     * Declared, and only ever undefined: bytes handed to the page have no address
     * anyone could go and look at. Spelled out rather than left off, because an
     * optional interface member is not inherited by the class implementing it —
     * omitted, `blobFile.source` is a type error instead of the straight "none"
     * the field exists to give. See {@link GenericFilehandle.source}.
     */
    readonly source?: undefined;
    private blob;
    constructor(blob: Blob);
    read(length: number, position?: number, opts?: FilehandleOptions): Promise<Uint8Array<ArrayBuffer>>;
    readFile(options?: ReadFileOptions): Promise<Uint8Array<ArrayBuffer>>;
    readFile(options: ReadFileTextOptions): Promise<string>;
    stat(): Promise<Stats>;
    close(): Promise<void>;
}