export type BridgeEvent = Readonly<{
    sessionId: string;
    eventId?: string;
    type: "connection.status" | "message.received" | "message.status";
    data: Record<string, unknown>;
}>;
export declare class CallbackClient {
    private readonly secret;
    constructor(secret: string);
    deliver(callbackUrl: string, event: BridgeEvent): Promise<void>;
}
