import { TemplateService } from './template.service';
import { ActionType } from '../../models/email-message/action.type';
import { QueueService } from './queue.service';
import { MailerService } from './mailer.service';
export declare class EngineService {
    private _queueService;
    private _templateService;
    private _mailerService;
    constructor(_queueService: QueueService, _templateService: TemplateService, _mailerService: MailerService);
    process(action: ActionType, slug: string, template: string, data: any): Promise<any>;
}