diff --git a/todo.txt b/todo.txt
index e12bae6..ba5f14c 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,4 +1,5 @@
 HIGH PRIORITY
+sign/submit tx
 change shared_ptr<Foo>(new Foo()) to make_shared
 cpp library readme with sample code
 code todos