import emmiter from 'emitter-tiny';
export declare type IAjax = (params: {
    chunk: File;
    index: number;
    all: number;
    md5: string;
}) => Promise<boolean | void>;
declare const createFlow: (file: File, chunkSize: number, ajax: IAjax, event?: emmiter) => {
    start(md5: string): Promise<void>;
    cancel(): Promise<void>;
};
export default createFlow;