From d63b553a2da3f5293d7202183c18cfdf28816b7f Mon Sep 17 00:00:00 2001
From: protolambda <proto@protolambda.com>
Date: Mon, 27 May 2019 21:45:47 +0200
Subject: [PATCH] efficiency bugfix in bytes encoding, improve typing doc +
 bugfix

---
 test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py   |  4 ++--
 test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py | 10 +++++++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py b/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py
index 655cd9da4..46d842e16 100644
--- a/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py
+++ b/test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py
@@ -14,7 +14,7 @@ def is_basic_type(typ):
 def serialize_basic(value, typ):
     if is_uint(typ):
         return value.to_bytes(uint_byte_size(typ), 'little')
-    if issubclass(typ, bool):
+    if is_bool_type(typ):
         if value:
             return b'\x01'
         else:
@@ -39,7 +39,7 @@ def serialize(obj, typ):
     if is_basic_type(typ):
         return serialize_basic(obj, typ)
     elif is_list_type(typ) or is_vector_type(typ):
-        return encode_series(list(obj), [read_elem_typ(typ)]*len(obj))
+        return encode_series(obj, [read_elem_typ(typ)]*len(obj))
     elif is_container_typ(typ):
         return encode_series(obj.get_field_values(), typ.get_field_types())
     else:
diff --git a/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py b/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py
index 1d8aed0de..93a272c8c 100644
--- a/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py
+++ b/test_libs/pyspec/eth2spec/utils/ssz/ssz_typing.py
@@ -376,12 +376,20 @@ def infer_input_type(fn):
         return fn(obj, typ)
     return infer_helper
 
+def is_bool_type(typ):
+    return issubclass(typ, bool)
 
 def is_list_type(typ):
+    """
+    Checks if the given type is a kind of list. Can be bytes.
+    """
     return (hasattr(typ, '_name') and typ._name == 'List') or typ == bytes
 
 def is_vector_type(typ):
-    return issubclass(typ, Vector)
+    """
+    Checks if the given type is a kind of vector. Can be BytesN.
+    """
+    return issubclass(typ, Vector) or issubclass(typ, BytesN)
 
 def is_container_typ(typ):
     return issubclass(typ, Container)