import { type H3Event } from 'h3';
/**
 * Validates Slack webhooks on the Edge
 * @see {@link https://docs.slack.dev/authentication/verifying-requests-from-slack/}
 * @param event H3Event
 * @returns {boolean} `true` if the webhook is valid, `false` otherwise
 */
export declare const isValidSlackWebhook: (event: H3Event) => Promise<boolean>;