/// <reference types="node" />
import { ListenerFn } from 'eventemitter2';
import { Database, StateDB } from '@liskhq/lisk-db';
import { EventCallback } from '../event';
import { BaseChannel, InvokeRequest } from './base_channel';
import { Bus } from '../bus';
import { EndpointHandlers } from '../../types';
import { Logger } from '../../logger';
export declare class InMemoryChannel extends BaseChannel {
    private bus;
    private readonly _db;
    private readonly _moduleDB;
    private readonly _chainID;
    constructor(logger: Logger, db: StateDB, moduleDB: Database, namespace: string, events: ReadonlyArray<string>, endpoints: EndpointHandlers, chainID: Buffer);
    registerToBus(bus: Bus): Promise<void>;
    subscribe(eventName: string, cb: EventCallback): void;
    unsubscribe(eventName: string, cb: ListenerFn): void;
    once(eventName: string, cb: EventCallback): void;
    publish(eventName: string, data?: Record<string, unknown>): void;
    invoke<T>(req: InvokeRequest): Promise<T>;
}