/// <reference types="node" />
import { OnModuleInit } from '@nestjs/common';
import { S3 } from 'aws-sdk';
export declare class S3Service implements OnModuleInit {
    private readonly logger;
    private readonly s3;
    constructor();
    onModuleInit(): Promise<void>;
    private checkOrCreateBucket;
    uploadFile(key: string, fileData: Buffer, contentType: string): Promise<S3.ManagedUpload.SendData>;
    deleteFiles(keys?: string[]): Promise<S3.Types.DeleteObjectOutput>;
    private uploadBuffer;
}