import type { BootstrapConfig, ConfigStore, SystemConfig } from '@citrineos/base';
import type { ILogObj } from 'tslog';
import { Logger } from 'tslog';
export declare class S3Storage implements ConfigStore {
    protected readonly _logger: Logger<ILogObj>;
    private s3Client;
    private defaultBucketName;
    private configFileName;
    private configBucketName;
    constructor(config: BootstrapConfig['fileAccess']['s3'], configFileName: string, configDir?: string, logger?: Logger<ILogObj>);
    saveFile(fileName: string, content: Buffer, filePath?: string): Promise<string>;
    getFile(id: string, filePath?: string): Promise<string | undefined>;
    fetchConfig(): Promise<SystemConfig | null>;
    saveConfig(config: SystemConfig): Promise<void>;
    private createBucket;
    private static streamToString;
}