/**
 * Matches replies to requests by id, for the control messages that hand
 * WebSocket ports across: each waiting request has a deadline, and all of a
 * peer's waiting requests can be failed at once when the peer is lost.
 */
export declare class PortRendezvous<T> {
    private readonly _prefix;
    private readonly _waiting;
    private _counter;
    constructor(_prefix?: string);
    /** A fresh id for a request. */
    newId(): string;
    get size(): number;
    /** Waits for the reply to `id`, failing after `timeoutMs`. */
    wait(id: string, timeoutMs: number, describe?: string): Promise<T>;
    /** Delivers the reply to `id`. `false` when nobody waits for it (it timed out). */
    settle(id: string, value: T): boolean;
    fail(id: string, error: Error): void;
    failAll(error: Error): void;
}
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