/**
 * Attack events (detected_attack and detected_attack_wave) are sent as fire-and-forget promises.
 *
 * However, in serverless environments like Lambda and Cloud Functions,
 * if the handler returns quickly, the execution environment freezes before these API calls complete, causing events to be lost.
 *
 * This class tracks these pending promises so they can be awaited before the function returns.
 *
 * Heartbeat and started events are already handled in the Lambda/Cloud Function integration and don't need tracking.
 */
export declare class PendingEvents {
    private pendingPromises;
    onAPICall(apiPromise: Promise<unknown>): void;
    waitUntilSent(timeoutInMS: number): Promise<void>;
}