How to pass in redux toolkit state as function argument to be used for another function

Question

I'm writing app where logic is stored in redux toolkit. Can You please tell me how can I pass data from getPostSuccess.state.post as argument of the function onGetPostHandler so I can use it in postTitle and postBody

    export const postSlice = createSlice({
  name: "post",
  initialState: initialPostState,
  reducers: {
    getPost: (state) => {
      state.loading = true;
    },
    getPostSuccess: (state, { payload }) => {
      state.post = payload;
      state.loading = false;
      state.hasErrors = false;
    },
    getPostFailure: (state) => {
      state.loading = false;
      state.hasErrors = true;
    },
  },
});



  export const onGetPostHandler = () => {
      let i = 0;
      const postTitle = post[i].title;
      const postBody = post[i].body;
      i++;
    };

thanks !