[
  {
    "ingredientPattern": "IBI,BCB,IBI",
    "ingredients": {
      "B": { "type": "item", "code": "game:plank-*" },
      "I": {
        "type": "item",
        "code": "game:ingot-*",
        "allowedVariants": ["copper", "iron"],
        "name": "tier"
      },
      "C": {
        "type": "block",
        "code": "chest-*-east",
        "attributes": { "type": "normal-generic" }
      }
    },
    "width": 3,
    "height": 3,
    "output": { "type": "item", "code": "bettercrates:upgrade-{tier}" }
  },
  {
    "ingredientPattern": "IBI,BCB,IBI",
    "ingredients": {
      "B": { "type": "item", "code": "game:plank-*" },
      "I": {
        "type": "item",
        "code": "game:ingot-*",
        "allowedVariants": ["tinbronze", "bismuthbronze", "blackbronze"]
      },
      "C": {
        "type": "block",
        "code": "chest-*-east",
        "attributes": { "type": "normal-generic" }
      }
    },
    "width": 3,
    "height": 3,
    "output": { "type": "item", "code": "bettercrates:upgrade-bronze" }
  }
]
