import { HeadersLike } from "../internal/headers.js";
import { APIResource } from "../resource.js";
export declare class Webhooks extends APIResource {
    /**
     * Validates that the given payload was sent by Metronome and parses the payload.
     */
    unwrap(payload: string, headers: HeadersLike, secret?: string | undefined | null): Object;
    private validateSecret;
    private signPayload;
    /** Make an assertion, if not `true`, then throw. */
    private assert;
    /** Compare to array buffers or data views in a way that timing based attacks
     * cannot gain information about the platform. */
    private timingSafeEqual;
    /**
     * Validates whether or not the webhook payload was sent by Metronome.
     *
     * An error will be raised if the webhook payload was not sent by Metronome.
     */
    verifySignature(body: string, headers: HeadersLike, secret?: string | undefined | null): void;
}
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