From 295f6c2cc60f290e4e7968a9d0a265de010d9238 Mon Sep 17 00:00:00 2001
From: rigel rozanski <rigel.rozanski@gmail.com>
Date: Mon, 5 Jun 2017 15:50:11 -0400
Subject: [PATCH 1/2] IsHex and StripHex

---
 common/string.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/common/string.go b/common/string.go
index a4d221b74..f053f0e87 100644
--- a/common/string.go
+++ b/common/string.go
@@ -1,6 +1,7 @@
 package common
 
 import (
+	"encoding/hex"
 	"fmt"
 	"strings"
 )
@@ -22,3 +23,22 @@ func LeftPadString(s string, totalLength int) string {
 	}
 	return s
 }
+
+// Returns true for non-empty hex-string prefixed with "0x"
+func IsHex(s string) bool {
+	if len(s) > 2 && s[:2] == "0x" {
+		_, err := hex.DecodeString(s[2:])
+		if err != nil {
+			return false
+		}
+		return true
+	}
+	return false
+}
+
+func StripHex(s string) string {
+	if IsHex(s) {
+		return s[2:]
+	}
+	return s
+}

From 925f2b33504bc2f19932be1d474ade0c33619c96 Mon Sep 17 00:00:00 2001
From: rigel rozanski <rigel.rozanski@gmail.com>
Date: Mon, 5 Jun 2017 16:22:01 -0400
Subject: [PATCH 2/2] golint corrections

---
 common/string.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/common/string.go b/common/string.go
index f053f0e87..2818f5ed5 100644
--- a/common/string.go
+++ b/common/string.go
@@ -6,8 +6,10 @@ import (
 	"strings"
 )
 
+// Fmt shorthand, XXX DEPRECATED
 var Fmt = fmt.Sprintf
 
+// RightPadString adds spaces to the right of a string to make it length totalLength
 func RightPadString(s string, totalLength int) string {
 	remaining := totalLength - len(s)
 	if remaining > 0 {
@@ -16,6 +18,7 @@ func RightPadString(s string, totalLength int) string {
 	return s
 }
 
+// LeftPadString adds spaces to the left of a string to make it length totalLength
 func LeftPadString(s string, totalLength int) string {
 	remaining := totalLength - len(s)
 	if remaining > 0 {
@@ -24,7 +27,7 @@ func LeftPadString(s string, totalLength int) string {
 	return s
 }
 
-// Returns true for non-empty hex-string prefixed with "0x"
+// IsHex returns true for non-empty hex-string prefixed with "0x"
 func IsHex(s string) bool {
 	if len(s) > 2 && s[:2] == "0x" {
 		_, err := hex.DecodeString(s[2:])
@@ -36,6 +39,7 @@ func IsHex(s string) bool {
 	return false
 }
 
+// StripHex returns hex string without leading "0x"
 func StripHex(s string) string {
 	if IsHex(s) {
 		return s[2:]