import { BBI } from './bbi.ts';
import type { RequestOptions } from './types.ts';
interface Index {
    type: number;
    fieldcount: number;
    offset: number;
    field: number;
}
/**
 * Parser for BigBed files. Inherits `getHeader`, `getFeatures`, and
 * `getFeaturesMulti` from `BBI`.
 *
 * Features have an additional `rest` field containing raw tab-delimited BED
 * columns 4+, and a `uniqueId` derived from the file offset. No zoom levels
 * are used for BigBed data.
 */
export declare class BigBed extends BBI {
    private indicesP?;
    readIndices(opts?: RequestOptions): Promise<Index[]>;
    protected getView(_scale: number, opts?: RequestOptions): Promise<import("./block-view.ts").BlockView>;
    private _readIndices;
    private searchExtraIndexBlocks;
    /**
     * Searches BigBed extra indexes (created via `-extraIndex` in `bedToBigBed`)
     * for a given name. A file may have multiple extra indexes, e.g. for gene ID
     * and gene name columns.
     *
     * @param name - value to look up in the extra index
     * @param opts - optional `RequestOptions` (e.g. `opts.signal` for abort)
     * @returns `Promise<Feature[]>` — matching features with an added `field`
     *   property indicating which extra-index column was matched
     */
    searchExtraIndex(name: string, opts?: RequestOptions): Promise<{
        field: number | undefined;
        offset?: number;
        chromId?: number;
        start: number;
        end: number;
        score?: number;
        rest?: string;
        minScore?: number;
        maxScore?: number;
        summary?: boolean;
        uniqueId?: string;
    }[]>;
}
export {};