import { ClassConstructor } from '@node-ts/bus-core';
import { WorkflowData } from './workflow-data';
export declare type WorkflowConstructor<TWorkflowData extends WorkflowData, TWorkflow extends Workflow<TWorkflowData> = Workflow<TWorkflowData>> = ClassConstructor<TWorkflow>;
export declare const WORKFLOW_STEP_DISCARDED = "discarded";
export declare abstract class Workflow<TWorkflowData extends WorkflowData> {
    /**
     * Flags that the workflow is complete, thereby preventing it from reacting to any
     * subsequent messages. This should be called as part of the return value of
     * a handling function
     * @param data Any final modifications to the workflow data that will be persisted
     * @example
     * \@Handles<TaskRan, TestWorkflowData, 'handleTaskRan'>(TaskRan, event => event.value, 'property1')
     * async handleTaskRan (event: TaskRan): Promise<Partial<TestWorkflowData>> {
     *   return this.complete({ taskRunDuration: event.duration })
     * }
     */
    protected complete(data?: Partial<TWorkflowData>): Partial<TWorkflowData>;
    /**
     * Tells the workflow engine to avoid persisting state for this workflow step. If this is
     * returned in a StartedBy handler, then the handler state will not be created and stored.
     * If this is run in a Handles handler, then changes to the state will not be run.
     */
    protected discard(): Partial<TWorkflowData>;
}