import { DocFileMeta } from "./DocFileMeta";
import { FileRef } from "./FileRef";
import { Backend } from "./Backend";
export declare type NetworkLayer = 'local' | 'web';
export declare class NetworkLayers {
    static LOCAL: Set<NetworkLayer>;
    static LOCAL_AND_WEB: Set<NetworkLayer>;
    static WEB: Set<NetworkLayer>;
}
export interface ReadableBinaryDatastore {
    containsFile(backend: Backend, ref: FileRef): Promise<boolean>;
    getFile(backend: Backend, ref: FileRef, opts?: GetFileOpts): DocFileMeta;
}
export interface GetFileOpts {
    readonly networkLayer?: NetworkLayer;
}
export declare type ReadableBinaryDatastoreProvider = () => ReadableBinaryDatastore;