Add eth/beacon/exceptions.py

hwwhww · hwwhww · commit c65ee5bee9f8 · 2018-12-21T17:32:00.000+08:00
diff --git a/eth/beacon/exceptions.py b/eth/beacon/exceptions.py
@@ -0,0 +1,10 @@
+from eth.exceptions import (
+    PyEVMError,
+)
+
+
+class MinEmptyValidatorIndexNotFound(PyEVMError):
+    """
+    No empty slot in the validator registry
+    """
+    pass
