我正在尝试自定义Redux工具包中包含的中间件来添加一个额外的参数。这个额外的参数是一个仓库的实现。
当我配置存储时，我添加了额外的参数：

export const store = configureStore({
 reducer: {
  students: students,
 },
 middleware: (getDefaultMiddleware) =>
  getDefaultMiddleware({
   thunk: {
    extraArgument: createAPIStudentRepository,
  },
  serializableCheck: false,
 }),
});

字符串
createAPIStudentRepository的类型为StudentRepository：

export const createAPIStudentRepository = (): StudentRepository => {
 return {
   loadStudents: async (query: string, page: number, limit: number) => {
     const response = await fetch(API_STUDENTS_URL(query, page, limit));
     const results = (await response.json()) as Student[];
     return results;
  },
 };
};

型
下面是Student存储库：

export interface StudentRepository {
 loadAStudents(
   query: string,
   page: number,
   limit: number
 ): Promise<Student[]>;
}

型
然后，在我的Redux Thunk中，我想使用我在配置商店时注入的createAPIStudentRepository：

interface StudentParams {
  query?: string;
  page?: number;
  limit?: number;
}

export const fetchStudents = createAsyncThunk(
  'student/fetch',
  async (
    params: StudentParams,
    { fulfillWithValue, rejectWithValue, extra }
  ) => {
    const { query = '', page = 1, limit = 10 } = params;

   try {
     //TODO: here is the problem, extra() throws an error: "extra" is of type 
     //"unknown"
     const studentRepository = extra();
     const results = await studentRepository.loadAStudents(
       query,
       page,
       limit
     );

     return { results, page, query };
   } catch (error: unknown) {
     console.log(error);
     return rejectWithValue("Error: couldn't fetch Students");
   }
 }
);

型
问题出在TODO行。这段代码可以工作，但我得到一个Typescript错误："extra" is of type "unknwon"。
有什么办法可以让Typescript知道类型吗？
参考文件：

• https://redux-toolkit.js.org/api/getDefaultMiddleware