export declare class WebhookDeliveryService {
    /**
     * Signs a payload with HMAC-SHA256
     */
    static signPayload(payload: string, secret: string): string;
    /**
     * Sends a webhook with retries
     */
    static sendWebhook(url: string, secret: string, event: string, data: any, attempt?: number): Promise<boolean>;
}
//# sourceMappingURL=delivery.d.ts.map