/// <reference types="node" />
import { Block, Chain, BlockHeader } from '@liskhq/lisk-chain';
import { Logger } from '../../../logger';
import { Network } from '../../network';
export declare abstract class BaseSynchronizer {
    protected _logger: Logger;
    protected _chain: Chain;
    protected _network: Network;
    protected _stop: boolean;
    constructor(logger: Logger, chain: Chain, network: Network);
    stop(): void;
    protected _getLastBlockFromNetwork(peerId: string): Promise<Block>;
    protected _getHighestCommonBlockFromNetwork(peerId: string, ids: Buffer[]): Promise<BlockHeader | undefined>;
    protected _getBlocksFromNetwork(peerId: string, fromID: Buffer): Promise<Block[]>;
    abstract run(receivedBlock: Block, peerId: string): Promise<void>;
    abstract isValidFor(receivedBlock: Block, peerId: string): Promise<boolean>;
}