declare const unsafeWindow: Window &
  typeof globalThis & {
    submission_data: Record<string, any>;
  };

interface GMResponse {
  readyState: number;
  responseHeaders: string;
  responseText: string;
  status: number;
  statusText: string;
}

declare const GM_xmlhttpRequest: (details: {
  url: string;
  method: string;
  headers?: Record<string, string>;
  data?: string;
  onload: (response: GMResponse) => void;
  onabort: (response: GMResponse) => void;
  ontimeout: (response: GMResponse) => void;
  onerror: (response: GMResponse) => void;
}) => void;

declare const GM: {
  getValue: (key: string, defaultValue?: string) => Promise<string | null>;
  setValue: (key: string, value: string) => Promise<void>;
};