/// <reference types="node" />
export type StorageType = StorageTypeFilesystem | StorageTypeAmazon | StorageTypeGoogle;
export type StorageTypeFilesystem = 'filesystem';
export type StorageTypeAmazon = 'amazon';
export type StorageTypeGoogle = 'google';
export interface StorageTypeData {
    filesystem: StorageTypeFilesystem;
    amazon: StorageTypeAmazon;
    google: StorageTypeGoogle;
}
export interface Storage {
    download: StorageDownload;
    downloadAll: StorageDownloadAll;
    upload: StorageUpload;
    obliterate: StorageObliterate;
    obliterateAll: StorageObliterateAll;
    generateLocations: StorageGenerateLocations;
    readDirectory: StorageReadDirectory;
}
export type StorageDownload = (filename: string) => Promise<string | undefined>;
export type StorageDownloadAll = (directory: string) => Promise<any[]>;
export type StorageUpload = (filename: string, data: Buffer, kind?: StorageUploadKind) => Promise<true | void>;
export type StorageObliterate = (filename: string) => Promise<true | undefined>;
export type StorageObliterateAll = (path: string) => Promise<true | undefined>;
export type StorageGenerateLocations = () => Promise<true | undefined>;
export type StorageReadDirectory = (path: string) => Promise<string[]>;
export type StorageUploadKind = 'write' | 'append';