From 4abb4cf5d01793f75535bc25801ff39ada721205 Mon Sep 17 00:00:00 2001
From: oysheng <33340252+oysheng@users.noreply.github.com>
Date: Tue, 3 Apr 2018 16:26:52 +0800
Subject: [PATCH] add xpubs out of bounds check (#522)

---
 asset/asset.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/asset/asset.go b/asset/asset.go
index 1b52e6f1..d35d7f46 100755
--- a/asset/asset.go
+++ b/asset/asset.go
@@ -140,6 +140,10 @@ func (reg *Registry) getNextAssetIndex(xpubs []chainkd.XPub) (*uint64, error) {
 
 // Define defines a new Asset.
 func (reg *Registry) Define(xpubs []chainkd.XPub, quorum int, definition map[string]interface{}, alias string, tags map[string]interface{}) (*Asset, error) {
+	if len(xpubs) == 0 {
+		return nil, errors.Wrap(signers.ErrNoXPubs)
+	}
+
 	normalizedAlias := strings.ToUpper(strings.TrimSpace(alias))
 	if normalizedAlias == consensus.BTMAlias {
 		return nil, ErrInternalAsset
-- 
2.11.0