diff --git a/str.go b/str.go
index a5a84a6..e0c8431 100644
--- a/str.go
+++ b/str.go
@@ -126,3 +126,11 @@ func GetEnvDefault(key, defval string) string {
 		return defval
 	}
 }
+
+// fix hex string to no 0x prefix
+func FixToNo0x(hexstr string) string {
+	if strings.HasPrefix(hexstr, "0x") {
+		return hexstr[2:]
+	}
+	return hexstr
+}