import { Web3Client } from '../clients/Web3Client';
export declare class BlockDateResolver {
    client: Web3Client;
    private AVG_INITIAL;
    private _known;
    private _requestedDate;
    constructor(client: Web3Client);
    getDate(blockNumber: number): Promise<Date>;
    getBlockNumberFor(date: Date): Promise<number>;
    getBlockInfoFor(date: Date): Promise<{
        block: number;
        timestamp: number;
    }>;
    private moveNext;
    /**
     * Returns the index of the known block nearest to the specified date. It can be before or after the specified date
     */
    private getClosest;
    private checkPoint;
    /** Adds a known block to the set */
    private push;
    /** Loads the block and returns its date */
    private getBlockDate;
    /** Returns the signed time in milliseconds between two dates. Values are negative when t2 < t1 */
    private diffTime;
    /** Returns the absolute time in milliseconds between two dates */
    private diffTimeAbs;
    /** Returns the average block count between two dates */
    private getAvgBlockCountBetween;
    /** With N > 1 blocks, we can better estimate the average block time */
    private refineAvg;
    private getBlock;
}