import { FactoryProvider, ModuleMetadata } from '@nestjs/common';
import { RunnerOptions, JobHelpers } from 'graphile-worker';
export declare const RUNNER_OPTIONS_KEY: unique symbol;
/**
 * Job middleware function type.
 * Middleware can modify payload, execute side effects, and control job execution.
 */
export type JobMiddleware = (payload: any, helpers: JobHelpers, next: (payload: any) => Promise<void>) => Promise<void>;
/**
 * We use `events` internally for decorators.
 */
export type GraphileWorkerConfiguration = Omit<RunnerOptions, 'events' | 'taskList'>;
export interface GraphileWorkerConfigurationFactory {
    createSharedConfiguration(): Promise<GraphileWorkerConfiguration> | GraphileWorkerConfiguration;
}
export interface GraphileWorkerAsyncConfiguration extends Pick<ModuleMetadata, 'imports'> {
    /**
     * Factory function that returns an instance of the provider to be injected.
     */
    useFactory: (...args: any[]) => Promise<GraphileWorkerConfiguration> | GraphileWorkerConfiguration;
    /**
     * Optional list of providers to be injected into the context of the Factory function.
     */
    inject?: FactoryProvider['inject'];
}