import { class_Dfr } from 'atma-utils';
import { Web3Client } from '../../clients/Web3Client';
import { TEth } from '../../models/TEth';
interface IBlockIndexer {
    name: string;
    persistence?: boolean;
    blocks?: {
        from: number;
        to?: number;
    };
    visitor: (block: TEth.Block<TEth.Hex>, data: {
        txs?: TEth.Tx[];
        receipts?: TEth.TxReceipt[];
    }) => Promise<void>;
    client: Web3Client;
    loadTransactions?: boolean;
    loadReceipts?: boolean;
    logProgress?: boolean | string;
}
export declare class BlocksWalker {
    params: IBlockIndexer;
    onEndPromise: class_Dfr<any>;
    private client;
    private visitor;
    private status;
    private cachedState;
    private everlog;
    private ranges;
    private walker;
    constructor(params: IBlockIndexer);
    start(from?: number | Date, to?: number | Date): Promise<void>;
    /**
     *  Can be called each time we get a new block from blockchain,
     *  the walker will process its current blocks and up until the specified number
     *  @param nr Number is not included: [from, end)
     */
    processUntil(nr: number): Promise<any>;
    stats(): {
        blockLoadTime: number;
        busy?: {
            nr: number;
            startedAt: number;
        }[];
        errors?: {
            nr: number;
            startedAt: number;
            duration: number;
            error: Error;
        }[];
        from?: number;
        to?: number;
        totalLeft?: number;
        totalTimeLeft?: string;
        processed?: number;
        avgTime?: number;
    };
    private isRestored;
    private restore;
    private getBlockNumber;
    private processBlocks;
    private save;
    private log;
}
export {};