export interface StandardWebhookOptions {
	/** Webhook secret. `whsec_` prefix is accepted and stripped. */
	secret: string;
	/** Max age of the timestamp the verifier will accept. Default:
	*  5 minutes (same as the Svix reference). */
	toleranceSeconds?: number;
	/** Clock source — injected for tests. Default: `Date.now`. */
	now?: () => number;
}
/** Verify a Standard Webhooks request. Pass the raw HTTP request (or
*  an adapter with `headers.get()` + `text()`). Resolves the payload
*  on success, rejects with an `Error` on signature failure / stale
*  timestamp. */
export declare function verifyStandardWebhook(request: Request, options: StandardWebhookOptions): Promise<string>;
/** Sign a payload for tests or self-sending. Returns the value you'd
*  put in the `webhook-signature` header. */
export declare function signStandardWebhook(secret: string, msgId: string, timestamp: number, body: string): Promise<string>;