store: Add log to ChainHeadListener::subscribe
@@ -182,6 +182,8 @@ impl ChainHeadUpdateListener {
impl ChainHeadUpdateListenerTrait for ChainHeadUpdateListener {
fn subscribe(&self, network_name: String, logger: Logger) -> ChainHeadUpdateStream {
+ debug!(logger, "subscribing to chain head updates");
+
let update_receiver = {
let existing = {
let watchers = self.watchers.read();
