From 069d73df3152d489e9916829251664d09619ca1f Mon Sep 17 00:00:00 2001
From: Yuriy Glukhov <yuriy.glukhov@gmail.com>
Date: Tue, 20 Mar 2018 15:44:17 +0200
Subject: [PATCH] Fixed listElem

---
 rlp.nim                  |  2 +-
 tests/test_api_usage.nim | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/rlp.nim b/rlp.nim
index c7ca633..fbff936 100644
--- a/rlp.nim
+++ b/rlp.nim
@@ -247,7 +247,7 @@ iterator items*(self: var Rlp): var Rlp =
     position = elemEnd
 
 proc listElem*(self: Rlp, i: int): Rlp =
-  let payload = bytes.slice payloadOffset()
+  let payload = bytes.slice(position + payloadOffset())
   result = rlpFromBytes payload
   var pos = 0
   while pos < i and result.hasData:
diff --git a/tests/test_api_usage.nim b/tests/test_api_usage.nim
index 04418e2..73d3a75 100644
--- a/tests/test_api_usage.nim
+++ b/tests/test_api_usage.nim
@@ -70,6 +70,18 @@ test "encode and decode lists":
     rlp.listElem(1).toString == "Lorem ipsum dolor sit amet"
     rlp.listElem(2).toString == "Donec ligula tortor, egestas eu est vitae"
 
+test "nested lists":
+  let listBytes = encode([[1, 2, 3], [5, 6, 7]])
+  let listRlp = rlpFromBytes listBytes
+  let sublistRlp0 = listRlp.listElem(0)
+  let sublistRlp1 = listRlp.listElem(1)
+  check sublistRlp0.listElem(0).toInt(int) == 1
+  check sublistRlp0.listElem(1).toInt(int) == 2
+  check sublistRlp0.listElem(2).toInt(int) == 3
+  check sublistRlp1.listElem(0).toInt(int) == 5
+  check sublistRlp1.listElem(1).toInt(int) == 6
+  check sublistRlp1.listElem(2).toInt(int) == 7
+
 test "encoding length":
   let listBytes = encode([1,2,3,4,5])
   let listRlp = rlpFromBytes listBytes