import { Cfb } from "./cfb/index.js";
export interface OpenFileSuccess {
    ok: true;
    data: Cfb;
    error?: never;
}
export interface OpenFileError {
    ok: false;
    data?: never;
    error: string;
}
export type OpenFileResult = OpenFileSuccess | OpenFileError;
export declare const openFile: (file: File) => Promise<Cfb>;
export declare const tryOpenFile: (file: File) => Promise<OpenFileResult>;