import type * as crud from '../crud/types';
declare class LayerMatch {
    readonly fs: crud.CrudApi;
    readonly rest: string;
    constructor(fs: crud.CrudApi, rest: string);
}
/**
 * An "overlay" file system, which can combine multiple CRUD-fs file systems
 * into one. Accepts one default file system and any number of additional
 * file systems to overlay on top at specific paths.
 *
 * A layer mounted at `''` (or `[]`) will be the default file system, it will
 * receive all requests that do not match any other layer.
 *
 * Example:
 *
 * ```
 * const fs = new OverlayCrud();
 * fs.overlay([], root);
 * fs.overlay(['usr', 'virtual'], userHome);
 * ```
 */
export declare class OverlayCrud implements crud.CrudApi {
    protected readonly prefix: string[];
    protected _layers: Record<string, crud.CrudApi>;
    constructor(layers?: Record<string, crud.CrudApi>, prefix?: string[]);
    overlay(path: string, fs: crud.CrudApi): void;
    protected _match(path: string): LayerMatch;
    readonly put: (path: string, data: Uint8Array, options?: crud.CrudPutOptions) => Promise<void>;
    readonly getStream: (path: string) => Promise<ReadableStream>;
    readonly del: (path: string, silent?: boolean) => Promise<void>;
    readonly info: (path: string) => Promise<crud.CrudResourceInfo>;
    readonly drop: (path: string, silent?: boolean) => Promise<void>;
    readonly scan: (path: string) => AsyncIterableIterator<crud.CrudCollectionEntry>;
    readonly list: (path: string) => Promise<crud.CrudCollectionEntry[]>;
    readonly from: (path: string) => Promise<crud.CrudApi>;
}
export {};