/**
 * Webhook Dispatcher
 *
 * Dispatches webhook POST requests when collection events occur.
 * Supports HMAC-SHA256 signature verification and configurable retries.
 */
import type { CollectionConfig, WebhookConfig, WebhookEvent, WebhookPayload } from '@momentumcms/core';
/**
 * Sign a webhook payload with HMAC-SHA256.
 * Returns the hex-encoded signature.
 */
declare function signPayload(payload: string, secret: string): string;
/**
 * Check if a webhook URL is safe to call.
 * Blocks private IP ranges, localhost, and non-http(s) protocols to prevent SSRF.
 * Set MOMENTUM_ALLOW_PRIVATE_WEBHOOKS=true to allow localhost/private IPs (e.g. for testing).
 */
declare function isAllowedWebhookUrl(url: string): boolean;
/**
 * Send a single webhook request with retry support.
 * Runs in the background (fire-and-forget).
 */
declare function sendWebhook(webhook: WebhookConfig, payload: WebhookPayload, attempt?: number): Promise<void>;
/**
 * Dispatch webhooks for a collection event.
 * Runs all matching webhooks in parallel, fire-and-forget.
 */
declare function dispatchWebhooks(webhooks: WebhookConfig[], event: WebhookEvent, payload: WebhookPayload): void;
/**
 * Register webhook hooks for all collections that have webhook configs.
 * Call this during server initialization, before initializeMomentumAPI().
 */
export declare function registerWebhookHooks(collections: CollectionConfig[]): void;
export { sendWebhook, dispatchWebhooks, signPayload, isAllowedWebhookUrl };