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 index of the first known block, which is most near to specified block (it can be before or after the specified date).
     */
    private getClosest;
    private checkPoint;
    /** Add a know block to set */
    private push;
    /** Loads the block and gets the Date of the block */
    private getBlockDate;
    /** Returns SIGNED time in milliseconds between two dates. Negative values when t2 < t1 */
    private diffTime;
    /** Returns ABSOLUTE time in milliseconds between two dates.  */
    private diffTimeAbs;
    /** Returns AVG block count between two dates */
    private getAvgBlockCountBetween;
    /** With N>1 blocks we can better find out the AVG block time */
    private refineAvg;
    private getBlock;
}