import { ConfigService } from '@nestjs/config';
export declare class NcpStorageService {
    private configService;
    private readonly logger;
    private readonly s3;
    private readonly bucket;
    private readonly cdnDomain;
    constructor(configService: ConfigService);
    upload(buffer: Buffer, key: string, contentType: string): Promise<string>;
    delete(key: string): Promise<void>;
}