HTTP 504 Error

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/verifone/refs/heads/main/json-schema/reporting-api-genericerror504.json",
  "title": "HTTP 504 Error",
  "description": "Gateway Timeout Error",
  "required": [
    "code",
    "message",
    "title",
    "type"
  ],
  "type": "object",
  "properties": {
    "code": {
      "type": "string",
      "enum": [
        "504"
      ],
      "default": "504"
    },
    "title": {
      "type": "string",
      "enum": [
        "Gateway Timeout"
      ],
      "default": "Gateway Timeout"
    },
    "message": {
      "type": "string",
      "default": "The server, while acting as a gateway or proxy, did not get a response in time from the upstream server that it needed in order to complete the request."
    },
    "timestamp": {
      "type": "string",
      "description": "The time that the error occurred. All dates in the JSON payloads are represented in ISO 8601 date-time format. \nAll date-time fields in responses must include the timezone.",
      "format": "date-time"
    },
    "type": {
      "type": "string",
      "enum": [
        "API_ERROR"
      ],
      "default": "API_ERROR"
    },
    "param": {
      "type": "string",
      "description": "The parameter the error relates to if the error is parameter-specific. You can use this to display a message near the correct form field, for example."
    }
  }
}