{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-step-functions/refs/heads/main/json-schema/amazon-step-functions-history-event-schema.json",
  "title": "HistoryEvent",
  "description": "Contains details about the events of an execution.",
  "type": "object",
  "properties": {
    "timestamp": {
      "allOf": [
        {
          "$ref": "#/components/schemas/Timestamp"
        },
        {
          "description": "The date and time the event occurred."
        }
      ]
    },
    "type": {
      "allOf": [
        {
          "$ref": "#/components/schemas/HistoryEventType"
        },
        {
          "description": "The type of the event."
        }
      ]
    },
    "id": {
      "allOf": [
        {
          "$ref": "#/components/schemas/EventId"
        },
        {
          "description": "The id of the event. Events are numbered sequentially, starting at one."
        }
      ]
    },
    "previousEventId": {
      "allOf": [
        {
          "$ref": "#/components/schemas/EventId"
        },
        {
          "description": "The id of the previous event."
        }
      ]
    },
    "activityFailedEventDetails": {
      "$ref": "#/components/schemas/ActivityFailedEventDetails"
    },
    "activityScheduleFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/ActivityScheduleFailedEventDetails"
        },
        {
          "description": "Contains details about an activity schedule event that failed during an execution."
        }
      ]
    },
    "activityScheduledEventDetails": {
      "$ref": "#/components/schemas/ActivityScheduledEventDetails"
    },
    "activityStartedEventDetails": {
      "$ref": "#/components/schemas/ActivityStartedEventDetails"
    },
    "activitySucceededEventDetails": {
      "$ref": "#/components/schemas/ActivitySucceededEventDetails"
    },
    "activityTimedOutEventDetails": {
      "$ref": "#/components/schemas/ActivityTimedOutEventDetails"
    },
    "taskFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskFailedEventDetails"
        },
        {
          "description": "Contains details about the failure of a task."
        }
      ]
    },
    "taskScheduledEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskScheduledEventDetails"
        },
        {
          "description": "Contains details about a task that was scheduled."
        }
      ]
    },
    "taskStartFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskStartFailedEventDetails"
        },
        {
          "description": "Contains details about a task that failed to start."
        }
      ]
    },
    "taskStartedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskStartedEventDetails"
        },
        {
          "description": "Contains details about a task that was started."
        }
      ]
    },
    "taskSubmitFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskSubmitFailedEventDetails"
        },
        {
          "description": "Contains details about a task that where the submit failed."
        }
      ]
    },
    "taskSubmittedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskSubmittedEventDetails"
        },
        {
          "description": "Contains details about a submitted task."
        }
      ]
    },
    "taskSucceededEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskSucceededEventDetails"
        },
        {
          "description": "Contains details about a task that succeeded."
        }
      ]
    },
    "taskTimedOutEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/TaskTimedOutEventDetails"
        },
        {
          "description": "Contains details about a task that timed out."
        }
      ]
    },
    "executionFailedEventDetails": {
      "$ref": "#/components/schemas/ExecutionFailedEventDetails"
    },
    "executionStartedEventDetails": {
      "$ref": "#/components/schemas/ExecutionStartedEventDetails"
    },
    "executionSucceededEventDetails": {
      "$ref": "#/components/schemas/ExecutionSucceededEventDetails"
    },
    "executionAbortedEventDetails": {
      "$ref": "#/components/schemas/ExecutionAbortedEventDetails"
    },
    "executionTimedOutEventDetails": {
      "$ref": "#/components/schemas/ExecutionTimedOutEventDetails"
    },
    "mapStateStartedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapStateStartedEventDetails"
        },
        {
          "description": "Contains details about Map state that was started."
        }
      ]
    },
    "mapIterationStartedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapIterationEventDetails"
        },
        {
          "description": "Contains details about an iteration of a Map state that was started."
        }
      ]
    },
    "mapIterationSucceededEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapIterationEventDetails"
        },
        {
          "description": "Contains details about an iteration of a Map state that succeeded."
        }
      ]
    },
    "mapIterationFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapIterationEventDetails"
        },
        {
          "description": "Contains details about an iteration of a Map state that failed."
        }
      ]
    },
    "mapIterationAbortedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapIterationEventDetails"
        },
        {
          "description": "Contains details about an iteration of a Map state that was aborted."
        }
      ]
    },
    "lambdaFunctionFailedEventDetails": {
      "$ref": "#/components/schemas/LambdaFunctionFailedEventDetails"
    },
    "lambdaFunctionScheduleFailedEventDetails": {
      "$ref": "#/components/schemas/LambdaFunctionScheduleFailedEventDetails"
    },
    "lambdaFunctionScheduledEventDetails": {
      "$ref": "#/components/schemas/LambdaFunctionScheduledEventDetails"
    },
    "lambdaFunctionStartFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/LambdaFunctionStartFailedEventDetails"
        },
        {
          "description": "Contains details about a lambda function that failed to start during an execution."
        }
      ]
    },
    "lambdaFunctionSucceededEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/LambdaFunctionSucceededEventDetails"
        },
        {
          "description": "Contains details about a Lambda function that terminated successfully during an execution."
        }
      ]
    },
    "lambdaFunctionTimedOutEventDetails": {
      "$ref": "#/components/schemas/LambdaFunctionTimedOutEventDetails"
    },
    "stateEnteredEventDetails": {
      "$ref": "#/components/schemas/StateEnteredEventDetails"
    },
    "stateExitedEventDetails": {
      "$ref": "#/components/schemas/StateExitedEventDetails"
    },
    "mapRunStartedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapRunStartedEventDetails"
        },
        {
          "description": "Contains details, such as <code>mapRunArn</code>, and the start date and time of a Map Run. <code>mapRunArn</code> is the Amazon Resource Name (ARN) of the Map Run that was started."
        }
      ]
    },
    "mapRunFailedEventDetails": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapRunFailedEventDetails"
        },
        {
          "description": "Contains error and cause details about a Map Run that failed."
        }
      ]
    }
  },
  "required": [
    "timestamp",
    "type",
    "id"
  ]
}