From bb875303c29d675c0934bfae026642a8c2a29358 Mon Sep 17 00:00:00 2001
From: Jae Kwon <jae@tendermint.com>
Date: Sat, 17 Mar 2018 14:42:08 +0100
Subject: [PATCH] Add NewErrorWithCause()

---
 common/errors.go | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/common/errors.go b/common/errors.go
index 4a15d0ee6..4e2591a9f 100644
--- a/common/errors.go
+++ b/common/errors.go
@@ -16,7 +16,11 @@ type Error interface {
 }
 
 func NewError(msg string) Error {
-	return newError(msg)
+	return newError(msg, nil)
+}
+
+func NewErrorWithCause(cause error, msg string) Error {
+	return newError(msg, cause)
 }
 
 type traceItem struct {
@@ -35,10 +39,10 @@ type cmnError struct {
 	traces []traceItem
 }
 
-func newError(msg string) *cmnError {
+func newError(msg string, cause error) *cmnError {
 	return &cmnError{
 		msg:    msg,
-		cause:  nil,
+		cause:  cause,
 		traces: nil,
 	}
 }