{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "additionalProperties": false,
  "required": ["currency", "gross_sales", "net_sales", "order_count"],
  "properties": {
    "currency": { "type": "string", "minLength": 3, "maxLength": 3 },
    "gross_sales": { "type": "number" },
    "net_sales": { "type": "number" },
    "order_count": { "type": "integer", "minimum": 0 }
  }
}