import { CacheConfig, Observable, RequestParameters, UploadableMap, Variables } from 'relay-runtime';
import { RelayObservable } from 'relay-runtime/lib/network/RelayObservable';
import { NextLink, Operation, OperationResponse, RequestHandler } from './types';
export declare function toLink(handler: RequestHandler | RelayLink): RelayLink;
export declare function from(links: (RequestHandler | RelayLink | false)[]): RelayLink;
export declare function fromError<TResponse = OperationResponse>(error: Error): Observable<TResponse>;
export declare function split(test: (op: Operation) => boolean, left: RequestHandler | RelayLink, right?: RequestHandler | RelayLink): RelayLink;
export declare function concat(first: RequestHandler | RelayLink, second: RequestHandler | RelayLink): RelayLink;
export declare function empty(): Observable<OperationResponse>;
export declare class RelayLink {
    static empty(): RelayLink;
    static from: typeof from;
    static split: typeof split;
    static execute: typeof execute;
    constructor(request?: RequestHandler);
    split(test: (op: Operation) => boolean, left: RelayLink | RequestHandler, right?: RelayLink | RequestHandler): RelayLink;
    concat(next: RelayLink | RequestHandler): RelayLink;
    execute(operation: Operation): RelayObservable<OperationResponse>;
    execute(request: RequestParameters, variables: Variables, cacheConfig: CacheConfig, uploadables?: UploadableMap | null): RelayObservable<OperationResponse>;
    request(operation: Operation, forward?: NextLink): RelayObservable<OperationResponse>;
}
export declare abstract class RelayDisposableLink extends RelayLink {
    abstract dispose(): void;
}
export interface InitializingLinkOptions {
    factory: () => RelayDisposableLink;
}
export declare class InitializingLink extends RelayLink {
    private readonly factory;
    private link?;
    constructor(options: InitializingLinkOptions);
    initialize(): void;
    request(operation: Operation, forward?: NextLink): RelayObservable<OperationResponse>;
}
export declare function execute(link: RelayLink, operation: Operation): RelayObservable<OperationResponse>;
export declare function execute(link: RelayLink, request: RequestParameters, variables: Variables, cacheConfig: CacheConfig, uploadables?: UploadableMap | null): RelayObservable<OperationResponse>;
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