import type { Readable } from 'node:stream';
import type { BinaryData } from './types';
export declare const CONFIG_MODES: readonly ["default", "filesystem", "s3"];
export declare function areConfigModes(modes: string[]): modes is BinaryData.ConfigMode[];
export declare function isStoredMode(mode: string): mode is BinaryData.StoredMode;
export declare function assertDir(dir: string): Promise<void>;
export declare function doesNotExist(dir: string): Promise<boolean>;
export declare function streamToBuffer(stream: Readable): Promise<Buffer<ArrayBufferLike>>;
export declare function binaryToBuffer(body: Buffer | Readable): Promise<Buffer<ArrayBufferLike>>;