import { class_Dfr } from 'atma-utils';
import { Web3Client } from '../clients/Web3Client';
import { TPlatform } from '../models/TPlatform';
import { TEth } from '../models/TEth';
export interface IBlocksTxIndexerOptions {
    /** Name of the indexer */
    name?: string;
    /** Save indexer progress (visited blocks) to a file */
    persistence?: boolean;
    /** Load transactions from the block and provide them to the visitor method */
    loadTransactions?: boolean;
    /** Load receipts from the block and provide them to the visitor method */
    loadReceipts?: boolean;
    client?: Web3Client;
    logProgress?: boolean;
}
export type TBlockListener = (client: Web3Client, block: TEth.Block<TEth.Hex>, data?: {
    txs?: TEth.Tx[];
    receipts?: TEth.TxReceipt[];
}) => Promise<void>;
export declare class BlocksTxIndexer {
    platform: TPlatform;
    opts?: IBlocksTxIndexerOptions;
    private client;
    private walker;
    private listeners;
    onStarted: class_Dfr<any>;
    constructor(platform: TPlatform, opts?: IBlocksTxIndexerOptions);
    onBlock(cb: TBlockListener): this;
    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;
    };
    start(from?: Date | number, to?: Date | number): Promise<void>;
    private startInner;
    private indexTransactions;
}