{
  "parameters": {
    "Region": {
      "type": "string",
      "builtIn": "AWS::Region",
      "documentation": "The region to dispatch this request, eg. `us-east-1`."
    }
  },
  "rules": [
    {
      "documentation": "Template the region into the URI when region is set",
      "conditions": [
        {
          "fn": "isSet",
          "argv": [
            {
              "ref": "Region"
            }
          ]
        }
      ],
      "endpoint": {
        "url": "https://{Region}.amazonaws.com",
        "headers": {
          "x-amz-region": [
            "{Region}"
          ],
          "x-amz-multi": [
            "*",
            "{Region}"
          ]
        }
      },
      "type": "endpoint"
    },
    {
      "documentation": "fallback when region is unset",
      "conditions": [],
      "error": "Region must be set to resolve a valid endpoint",
      "type": "error"
    }
  ],
  "version": "1.3"
}