import { GetObjectCommand, GetObjectCommandInput, GetObjectCommandOutput, PutObjectCommand, PutObjectCommandInput, PutObjectCommandOutput, S3Client, S3ServiceException, ListObjectsV2Command } from '@aws-sdk/client-s3';
/**
 * Re-exporting commands to be helpful so clients may not have to import the AWS SDK directly.
 */
export { GetObjectCommand, GetObjectCommandInput, GetObjectCommandOutput, PutObjectCommand, PutObjectCommandInput, PutObjectCommandOutput, S3ServiceException, ListObjectsV2Command, };
export declare function getS3Client(region?: string): S3Client;
export interface PutFileInput {
    bucketName: string;
    key: string;
    data: Buffer;
    contentType: string;
    region?: string;
}
export declare function putFile(input: PutFileInput): Promise<void>;
export interface GetSignedGetObjectUrlInput {
    bucketName: string;
    key: string;
    region?: string;
    expiresIn?: number;
}
export declare function getSignedGetObjectUrl(input: GetSignedGetObjectUrlInput): Promise<string>;
export interface GetSignedPutObjectUrlInput {
    bucketName: string;
    key: string;
    contentType: string;
    region?: string;
    expiresIn?: number;
    metadata?: Record<string, string>;
}
export declare function getSignedPutObjectUrl(input: GetSignedPutObjectUrlInput): Promise<string>;
export interface GetObjectInput {
    bucketName: string;
    key: string;
    region?: string;
}
export interface GetObjectOutput {
    buffer: Buffer;
    fileName: string;
    contentType?: string;
    metadata?: Record<string, string>;
}
export declare function getFile(input: GetObjectInput): Promise<GetObjectOutput | null>;
export interface ListObjectsInput {
    bucketName: string;
    prefix: string;
    region?: string;
}
export interface S3ObjectInfo {
    key: string;
    fileName: string;
    contentType?: string;
    metadata?: Record<string, string>;
    lastModified?: Date;
    size?: number;
}
export declare function listObjectsWithMetadata(input: ListObjectsInput): Promise<S3ObjectInfo[]>;
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