Function jsonRpcErrorBody

packages/hosts/mcp/src/envelope.ts:86–107

(
  status: number,
  code: number,
  message: string,
  opts?: { readonly cors?: boolean; readonly challenge?: string },
)

 * local — the four hand-rolled copies are deleted in favor of this.
 */
export const jsonRpcErrorBody = (
  status: number,
  code: number,
  message: string,
  opts?: { readonly cors?: boolean; readonly challenge?: string },
): Response => {
  const cors = opts?.cors ?? true;
  const challenge = opts?.challenge;
  return new Response(JSON.stringify({ jsonrpc: "2.0", error: { code, message }, id: null }), {
    status,
    headers: {
      "content-type": "application/json",
      ...(cors ? { "access-control-allow-origin": "*" } : {}),
      ...(challenge
        ? {
            "www-authenticate": challenge,
            "access-control-expose-headers": "WWW-Authenticate",
          }
        : {}),
    },
  });
};

/** The envelope's own CORS-on JSON-RPC error `Response`, optionally carrying a challenge. */
const jsonRpcResponse = (