import { EventEmitter } from 'events';
import { SagaOptions, Scaling } from '../options';
import { Executor, Facts, FactsMetaContract, Middleware, NodeMeta } from '../parameters';
import { FrameworkInterface } from '../framework';
import { Processor } from '../node';
export declare class Saga<DataType, NodeName extends string> {
    private static instances;
    protected options: SagaOptions;
    protected eventEmitter: EventEmitter;
    protected nodes: Map<NodeName, Processor<DataType, NodeName>>;
    protected facts: Map<string, Facts<DataType, NodeName>>;
    protected middleware: Map<NodeName, Middleware<DataType, NodeName>[]>;
    protected meta: Map<NodeName, NodeMeta>;
    protected framework: FrameworkInterface<DataType, NodeName>;
    constructor(sagaOptions?: SagaOptions);
    static terminate(): void;
    stop(): void;
    addMiddleware(nodes: NodeName[], middlewares: Middleware<DataType, NodeName>[]): void;
    addNode(node: NodeName, executor: Executor<DataType, NodeName>, nodeMeta?: Partial<NodeMeta>, scaling?: Scaling): void;
    process(startNode: NodeName, data: DataType, factsMeta?: Pick<FactsMetaContract<NodeName>, 'expireAfter' | 'executeAfter' | 'retriesLimit'>): Promise<DataType>;
    state(): void;
}