import type { DeliveryEvent } from "./types.js";
/**
 * Parse a WhatsApp Cloud API webhook payload into normalized
 * {@link DeliveryEvent} records (outbound `statuses` only).
 */
export declare function parse(payload: unknown): DeliveryEvent[];
/**
 * Verify a Meta WhatsApp webhook signature (`X-Hub-Signature-256`).
 * Computes HMAC-SHA256 over the unmodified raw body with the app secret.
 * Returns false when the header is missing or the signature does not match.
 *
 * @see https://developers.facebook.com/docs/graph-api/webhooks/getting-started#verification-requests
 */
export declare function verifySignature(payload: string, signatureHeader: string, appSecret: string): Promise<boolean>;