{
  "$schema": "https://json-structure.org/draft-00/schema",
  "name": "FixerRatesResponse",
  "description": "JSON Structure for a Fixer real-time or historical rates envelope.",
  "type": "object",
  "properties": {
    "success": { "type": "boolean" },
    "timestamp": { "type": "int64" },
    "historical": { "type": "boolean" },
    "base": { "type": "string", "x-format": "iso4217" },
    "date": { "type": "string", "x-format": "date" },
    "rates": {
      "type": "map",
      "values": { "type": "double" }
    }
  },
  "required": ["success", "timestamp", "base", "date", "rates"]
}