From 6200fd0a2c39a3e4feffc4ea3d0a5e8c390ace07 Mon Sep 17 00:00:00 2001
From: Keri <kclowes@users.noreply.github.com>
Date: Wed, 18 Sep 2019 14:12:19 -0600
Subject: [PATCH] Add padding back to StrictByteStringEncoder

---
 web3/_utils/abi.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/web3/_utils/abi.py b/web3/_utils/abi.py
index 6b66d93ed1..176009464f 100644
--- a/web3/_utils/abi.py
+++ b/web3/_utils/abi.py
@@ -253,7 +253,15 @@ def validate(self):
 
     def encode(self, value):
         normalized_value = self.validate_value(value)
-        return self.encode_fn(normalized_value)
+
+        base_encoded_value = self.encode_fn(normalized_value)
+
+        if self.is_big_endian:
+            padded_encoded_value = base_encoded_value.rjust(32, b'\x00')
+        else:
+            padded_encoded_value = base_encoded_value.ljust(32, b'\x00')
+
+        return padded_encoded_value
 
     def validate_value(self, value):
         if not is_bytes(value) and not is_text(value):