export type UploadResult = {
    signatureURL: string | null;
    url: string;
    thumbUrl: string;
    mime: string;
};
export type UploadEventTarget = EventTarget & {
    promise: Promise<UploadResult>;
    status: 'pending' | 'success' | 'fail';
    progress: ProgressEvent | void;
    data: UploadResult;
    error: Error | void;
    ok: () => Promise<void>;
    addListener(eventName: 'progress', callback: (event: ProgressEvent) => void): () => void;
    addListener(eventName: 'success', callback: (event: UploadSuccessEvent) => void): () => void;
    addListener(eventName: 'error', callback: (event: UploadErrorEvent) => void): () => void;
};
export type UploadSuccessEvent = CustomEvent<UploadResult>;
export type UploadErrorEvent = CustomEvent<Error>;
/**
 *
 * 返回一个函数，这个函数可以创建一个UploadEventTarget
 *
 * return (file: File, options: ...) => UploadEventTarget
 */
export declare function useUpload(): (file: File | Blob | string, options?: {
    category?: 'avatar' | 'caption';
    sendRaw?: boolean;
}) => UploadEventTarget;