{
  "sticker": {
    "paperSize": "custom",
    "size": {
      "width": "4",
      "height": "6",
      "unit": "inch"
    },
    "copies": 1,
    "fields": [
      "order_id",
      "customer",
      "phone",
      "address",
      "items",
      "total",
      "tracking",
      "courier"
    ]
  },
  "invoice": {
    "paperSize": "custom",
    "size": {
      "width": "8.27",
      "height": "11.69",
      "unit": "inch"
    },
    "copies": 1,
    "fields": [
      "order_id",
      "customer",
      "phone",
      "address",
      "items",
      "subtotal",
      "delivery",
      "discount",
      "total",
      "date"
    ]
  }
}