import { Web3Client } from '../../clients/Web3Client';
import { IGasWatcherStore } from './GasWatcherStore';
import { IGasWatcherCondition } from './GasWatcherTx';
import type { TxWriter } from '../TxWriter';
export declare class GasWatcherService {
    client: Web3Client;
    store: IGasWatcherStore;
    private pending;
    private logger;
    private timer;
    static load(client: Web3Client, store?: IGasWatcherStore): Promise<GasWatcherService>;
    protected constructor(client: Web3Client, store: IGasWatcherStore);
    start(): void;
    tick(): Promise<void>;
    add(writer: TxWriter, condition: IGasWatcherCondition): Promise<void>;
    private loadTxs;
    private saveTxs;
}