import { ModuleRef } from '@nestjs/core';
import { ExecutionReason, TaskExecution } from '../interfaces/execution.interface';
import { WorkflowDefinition } from '../interfaces/workflow-definition.interface';
import { GenericState, TaskReturnType } from '../types/task-method.type';
export interface ExecutionResult<T extends string, U extends GenericState> {
    success: boolean;
    taskResult?: TaskReturnType<T, U>;
    execution: TaskExecution<T>;
}
export declare class TaskRunner {
    private readonly moduleRef;
    private readonly logger;
    constructor(moduleRef: ModuleRef);
    executeTask<T extends string, U extends GenericState>(workflowDefinition: WorkflowDefinition<T, U>, taskName: T, state: U, reason: ExecutionReason): Promise<ExecutionResult<T, U>>;
    private getWorkflowInstance;
    private isValidWorkflowInstance;
    private calculateStateMutation;
}
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