import { OnModuleInit } from '@nestjs/common';
import { UpdatePhase, UpdateStatusType } from '../system.constants';
import { UpdateService } from './update.service';
export interface UpdateProgressFile {
    status: UpdateStatusType;
    phase: UpdatePhase;
    targetVersion: string;
    startedAt: string;
    completedAt?: string;
    error?: string;
}
export declare class UpdateExecutorService implements OnModuleInit {
    private readonly updateService;
    private readonly logger;
    constructor(updateService: UpdateService);
    onModuleInit(): void;
    private checkPendingUpdateStatus;
    startUpdate(targetVersion: string): Promise<void>;
    private writeStatusFile;
}