Full Stack E-Commerce App (8 hours free tutorial)

const router = require("express").Router();const stripe = require("stripe")(process.env.STRIPE_KEY);router.post("/payment", (req, res) => {  stripe.charges.create(    {      source: req.body.tokenId,      amount: req.body.amount,      currency: "usd",    },    (stripeErr, stripeRes) => {      if (stripeErr) {        res.status(500).json(stripeErr);      } else {        res.status(200).json(stripeRes);      }    }  );});module.exports = router;

import { createSlice } from "@reduxjs/toolkit";export const productSlice = createSlice({  name: "product",  initialState: {    products: [],    isFetching: false,    error: false,  },  reducers: {    //GET ALL    getProductStart: (state) => {      state.isFetching = true;      state.error = false;    },    getProductSuccess: (state, action) => {      state.isFetching = false;      state.products = action.payload;    },    //DELETE    deleteProductStart: (state) => {      state.isFetching = true;      state.error = false;    },    deleteProductSuccess: (state, action) => {      state.isFetching = false;      state.products.splice(        state.products.findIndex((item) => item._id === action.payload),        1      );    },    //UPDATE    updateProductStart: (state) => {      state.isFetching = true;      state.error = false;    },    updateProductSuccess: (state, action) => {      state.isFetching = false;      state.products[        state.products.findIndex((item) => item._id === action.payload.id)      ] = action.payload.product;    },    //ADD    addProductStart: (state) => {      state.isFetching = true;      state.error = false;    },    addProductSuccess: (state, action) => {      state.isFetching = false;      state.products.push(action.payload);    },    failure: (state) => {      state.isFetching = false;      state.error = true;    },  },});