import { N as NotificationEvent } from "./types.d-C7l7qdMG.js";
/**
 * Case-insensitive map of inbound request headers. Values may be a single string or
 * an array (mirroring `node:http` and `Headers`); verifiers normalise both forms.
 */
type WebhookHeaders = Record<string, string | string[] | undefined>;
/**
 * A provider inbound-webhook verifier: validates the request signature and normalises
 * the body into a {@link NotificationEvent}.
 */
interface WebhookVerifier {
  /**
   * Normalises a verified webhook body into a {@link NotificationEvent}.
   * @param body The raw request body (string).
   * @returns The normalised event, or `undefined` when the body is not a delivery event.
   */
  parse: (body: string) => NotificationEvent | undefined;
  /**
   * Verifies the request signature against the shared secret.
   * @param payload The raw request body (string).
   * @param headers The inbound request headers.
   * @param secret The provider signing secret / auth token.
   * @returns `true` when the signature is valid.
   */
  verify: (payload: string, headers: WebhookHeaders, secret: string) => Promise<boolean>;
}
/**
 * Reads a header value case-insensitively, coercing array values to their first entry.
 * @param headers The inbound headers.
 * @param name The header name to read.
 * @returns The header value, or `undefined` when absent.
 */
declare const getHeader: (headers: WebhookHeaders, name: string) => string | undefined;
export { WebhookHeaders as W, WebhookVerifier as a, getHeader as g };