{
  "smelting": [
    {
      "block": "furnace",
      "input": {
        "id": "minecraft:raw_iron"
      },
      "output": {
        "id": 265
      }
    },
    {
      "block": "furnace",
      "input": {
        "id": "minecraft:raw_gold"
      },
      "output": {
        "id": 266
      }
    },
    {
      "block": "furnace",
      "input": {
        "id": "minecraft:raw_copper"
      },
      "output": {
        "id": "minecraft:copper_ingot"
      }
    }
  ]
}