import { Readable } from 'stream';
import type { PieceFrontmatterSchemaField, PieceFrontMatterValue } from './frontmatter.js';
import type LuzzleStorage from '../../storage/abstract.js';
type AttachableStream = {
    stream: Readable;
    filename?: string;
};
declare function calculateHashFromFile(stream: Readable): Promise<string>;
declare function detectStreamFileType(stream: Readable, maxBytes?: number): Promise<{
    type: import("file-type").FileTypeResult | undefined;
    stream: Readable;
}>;
declare function savePieceAsset(file: string, filename: string, stream: Readable, storage: LuzzleStorage): Promise<string>;
declare function savePieceAsset(file: string, source: string, storage: LuzzleStorage, options?: {
    name?: string;
}): Promise<string>;
declare function savePieceFieldAsset(file: string, field: PieceFrontmatterSchemaField, stream: AttachableStream, storage: LuzzleStorage): Promise<string>;
declare function isAttachableStream(value: unknown): value is AttachableStream;
declare function makePieceValue(field: PieceFrontmatterSchemaField, value: PieceFrontMatterValue | AttachableStream): Promise<PieceFrontMatterValue | AttachableStream>;
export { calculateHashFromFile, isAttachableStream, savePieceFieldAsset, makePieceValue, detectStreamFileType, savePieceAsset, type AttachableStream, };