/**
 * @swagger
 * components:
 *   schemas:
 *     ExternalTask:
 *       description: Describes an ExternalTask that the Engine has delegated to an ExternalTask worker for processing.
 *       type: object
 *       required:
 *         - id
 *         - workerId
 *         - topic
 *         - isSingleTry
 *         - flowNodeInstanceId
 *         - correlationId
 *         - processDefinitionId
 *         - processInstanceId
 *         - ownerId
 *         - payload
 *         - lockExpirationTime
 *         - state
 *       properties:
 *         id:
 *           description: The ID of the ExternalTask.
 *           type: string
 *         workerId:
 *           description: The ID of the worker that has most recently locked the ExternalTask for processing.
 *           type: string
 *         topic:
 *           description: The topic of the ExternalTask.
 *           type: string
 *         isSingleTry:
 *           description: A flag indicating whether or not the ExternalTask is a single try task.
 *           type: boolean
 *         flowNodeInstanceId:
 *           description: The ID of the FlowNodeInstance that the ExternalTask belongs to.
 *           type: string
 *         correlationId:
 *           description: The ID of the Correlation that the ExternalTask belongs to.
 *           type: string
 *         processDefinitionId:
 *           description: The ID of the ProcessDefinition that contains the ExternalTask.
 *           type: string
 *         processModelId:
 *           description: The ID of the ProcessModel that contains the ExternalTask.
 *           type: string
 *         embeddedProcessModelId:
 *           description: The ID of the SubProcess that contains the ExternalTask.
 *           type: string
 *         processInstanceId:
 *           description: The ID of the ProcessInstance the ExternalTask belongs to.
 *           type: string
 *         ownerId:
 *           description: The ID of the user that owns the ExternalTask.
 *           type: string
 *         payload:
 *           description: The payload containing all relevant data the worker needs to execute the ExternalTask.
 *           type: object
 *         lockExpirationTime:
 *           description: The lock expiration time. On expiration, the task is released to be processed by other workers. If not set, the ExternalTask is not locked.
 *           type: string
 *         state:
 *           description: The state of the ExternalTask.
 *           $ref: '#/components/schemas/ExternalTaskState'
 *         finishedAt:
 *           description: The date when the ExternalTask was finished.
 *           type: string
 *         result:
 *           description: The result of the ExternalTask.
 *           type: object
 *         error:
 *           description: The error that occurred during processing of the ExternalTask (if any).
 *           type: object
 *         createdAt:
 *           description: The date when the ExternalTask was created.
 *           type: string
 */
/**
 * Describes an ExternalTask that the Engine has delegated to an
 * ExternalTask worker for processing.
 */
export declare type ExternalTask<TPayload> = {
    id: string;
    /**
     * The ID of the worker that has most recently locked the ExternalTask
     * for processing.
     */
    workerId: string;
    topic: string;
    isSingleTry: boolean;
    flowNodeInstanceId: string;
    correlationId: string;
    processDefinitionId: string;
    processModelId?: string;
    embeddedProcessModelId?: string;
    processInstanceId: string;
    ownerId: string;
    /**
     * The payload containing all relevant data the worker needs to execute the
     * ExternalTask.
     */
    payload: TPayload;
    /**
     * The lock expiration time. On expiration, the task is released to
     * be processed by other workers.
     * If not set, the ExternalTask is not locked.
     */
    lockExpirationTime: Date;
    state: ExternalTaskState;
    finishedAt?: Date;
    result?: any;
    error?: any;
    createdAt?: Date;
};
/**
 * @swagger
 * components:
 *   schemas:
 *     ExternalTaskState:
 *       description: Describes the state of an ExternalTask.
 *       type: string
 *       enum:
 *         - pending
 *         - finished
 *         - expired
 */
export declare enum ExternalTaskState {
    pending = "pending",
    finished = "finished",
    expired = "expired"
}