import { Web3Client } from '../clients/Web3Client';
import { TPlatform } from '../models/TPlatform';
import { TEth } from '../models/TEth';
export interface IPendingTxIndexerOptions {
    /** Name of the indexer */
    name?: string;
}
export type TPendingTxListener = (client: Web3Client, tx: TEth.Tx) => Promise<void>;
export declare class PendingTxIndexer {
    platform: TPlatform;
    opts?: IPendingTxIndexerOptions;
    private client;
    private walker;
    private listeners;
    private mempoolHash;
    private loader;
    private blocks;
    private status;
    constructor(platform: TPlatform, opts?: IPendingTxIndexerOptions);
    onTransaction(cb: TPendingTxListener): this;
    stats(): {
        active: boolean;
    } | {
        loader: {
            counts: {
                loading: number;
                pending: number;
                processed: number;
                errors: number;
            };
            errors: {
                date: Date;
                hash: TEth.Hex;
                error: Error;
            }[];
            error: string;
            avgLoadTime: number;
        };
        blocks: {
            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;
        };
        startedAt: number;
        txSpeed: number;
        txCount: number;
        txNulls: number;
        txPrivateCount: number;
        active: boolean;
    };
    start(): Promise<void>;
    private onMempoolTxLoaded;
    private onBlockLoaded;
}