eth, les: defer starting LES service until ETH initial sync is finished

1 files changed, 8 insertions, 1 deletions

diff --git a/eth/sync.go b/eth/sync.go
index 6584bb1e2..b6918c2be 100644
--- a/eth/sync.go
+++ b/eth/sync.go
@@ -180,7 +180,7 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 	if err := pm.downloader.Synchronise(peer.id, pHead, pTd, mode); err != nil {
 		return
 	}
-	atomic.StoreUint32(&pm.synced, 1) // Mark initial sync done
+	pm.setSynced() // Mark initial sync done
 
 	// If fast sync was enabled, and we synced up, disable it
 	if atomic.LoadUint32(&pm.fastSync) == 1 {
@@ -191,3 +191,10 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 		}
 	}
 }
+
+// setSynced sets the synced flag and notifies the light server if present
+func (pm *ProtocolManager) setSynced() {
+	if atomic.SwapUint32(&pm.synced, 1) == 0 && pm.lesServer != nil {
+		pm.lesServer.Synced()
+	}
+}