import { Observable, FetchResult, Operation, ApolloLink } from '@apollo/client';
export interface WsLinkOptions {
    /**
     * Full WS endpoint, e.g.
     * `wss://gw-wspace.local.burdenoff.com/workspaces/graphql`.
     */
    url: string;
    /** Lazy: only open the socket on first subscription. */
    lazy?: boolean;
    /**
     * Static headers forwarded as `connectionParams`. Per-subscription
     * headers from Apollo `operation.context.headers` always override.
     */
    headers?: Record<string, string>;
    /** Connection-level keepalive ping interval. Default 30 s. */
    keepAliveMs?: number;
    debug?: boolean;
}
export declare class WsLink extends ApolloLink {
    private client;
    private debug;
    constructor(options: WsLinkOptions);
    /**
     * Tear down the underlying connection. Useful in tests and on
     * logout.
     */
    dispose(): Promise<void>;
    request(operation: Operation): Observable<FetchResult>;
}
//# sourceMappingURL=ws-link.d.ts.map