import { ISyncDownloader } from "./ISyncDownloader";
import { BlockDTO } from "../../../../lib/dto/BlockDTO";
export declare abstract class ASyncDownloader implements ISyncDownloader {
    chunkSize: number;
    protected constructor(chunkSize: number);
    getBlock(number: number): Promise<BlockDTO | null>;
    abstract maxSlots: number;
    abstract getChunk(i: number): Promise<BlockDTO[]>;
}