- For the Worker - ServerSide
- For the customer - CustomerSide
- inventory.json - To keep track of all the products (includes those which are out of stock too)
- outOfStock.json - To keep track of the products out of Stock
- sales.json - Details of each bill generated
- productSales.json - Each product sale descripion
{
   "ProductID": {
       "name": ,
       "price": ,
       "quantity": 
   }
  
}{
  "ProductID DD/MM/YYYY HH:MM": {
      "name": ,
      "price":,
      "TimeDetail": 
  }
}{
  " DD/MM/YYYY HH:MM:SS": {
      "ProductID1": {
          "Qn": ,
          "total_price":,
          "name": 
      },
      "ProductID2": {
          "Qn": ,
          "total_price":,
          "name":
      }
  }
}{
  "ProductID DD/MM/YYYY HH:MM": {
      "Qn": ,
      "total_price": ,
      "name": 
  }
}