import { DB } from '@pigi/core';
import { Block, Provider } from 'ethers/providers';
import { EthereumListener } from './interfaces/listener';
export declare class EthereumBlockProcessor {
    private readonly db;
    private readonly earliestBlock;
    private readonly subscriptions;
    private currentBlockNumber;
    private syncInProgress;
    private syncCompleted;
    constructor(db: DB, earliestBlock?: number);
    subscribe(provider: Provider, handler: EthereumListener<Block>, syncPastBlocks?: boolean): Promise<void>;
    private fetchAndDisseminateBlock;
    private syncBlocks;
    private finishSync;
    private getBlockNumber;
}