/**
 * Standard-Webhooks verification, as plain functions: the base64 the secret and
 * the signature are carried in, the exact bytes a delivery signs, and the capped
 * body read that keeps an oversized delivery from being buffered whole.
 *
 * Lifted out of engine.ts unchanged.
 */
export declare const base64url: (bytes: Uint8Array) => string;
export declare const verifySignature: (secret: string, signature: string, signed: Uint8Array) => Promise<boolean>;
export declare const signedWebhookBytes: (deliveryId: string, timestamp: string, raw: Uint8Array) => Uint8Array;
export declare const readLimitedBody: (request: Request, limit: number) => Promise<Uint8Array | null>;
//# sourceMappingURL=webhook-signature.d.ts.map