/// <reference types="node" />
import { Readable } from 'readable-stream';
import { ReadableOptions } from 'stream';
import { SourceDestination } from '../source-destination/source-destination';
import { BlocksWithChecksum, SparseReadable } from './shared';
export declare class SparseReadStream extends Readable implements SparseReadable {
    private source;
    readonly blocks: BlocksWithChecksum[];
    private chunkSize;
    private stateIterator;
    private state?;
    private positionInBlock;
    constructor(source: SourceDestination, blocks: BlocksWithChecksum[], chunkSize: number, verify: boolean, generateChecksums: boolean, options?: ReadableOptions);
    _read(): Promise<void>;
    private nextBlock;
    private __read;
}