{
  "description": "The details of the required construction materials for a given waypoint under construction.",
  "type": "object",
  "properties": {
    "tradeSymbol": {
      "$ref": "./TradeSymbol.json"
    },
    "required": {
      "type": "integer",
      "description": "The number of units required."
    },
    "fulfilled": {
      "type": "integer",
      "description": "The number of units fulfilled toward the required amount."
    }
  },
  "required": [
    "tradeSymbol",
    "required",
    "fulfilled"
  ]
}