--- /dev/null
+'use strict';
+
+class MysteryBoxError extends Error {
+ constructor(...args) {
+ super(...args);
+ Error.captureStackTrace(MysteryBoxError);
+ }
+
+ get name() {
+ return this.constructor.name;
+ }
+}
+
+module.exports = {
+ MysteryBoxError,
+};
\ No newline at end of file