diff --git a/plugin/traffic/xds/nonce.go b/plugin/traffic/xds/nonce.go
new file mode 100644
index 000000000..1d2d18f4d
--- /dev/null
+++ b/plugin/traffic/xds/nonce.go
@@ -0,0 +1,13 @@
+package xds
+
+func (c *Client) Nonce() string {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	return c.nonce
+}
+
+func (c *Client) SetNonce(n string) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.nonce = n
+}