From 3ba6900b81f1249b0c9abbe0d6b72d8d70ba297c Mon Sep 17 00:00:00 2001
From: Lucas Hendren <lhendre2@gmail.com>
Date: Thu, 30 Aug 2018 01:34:36 -0400
Subject: [PATCH] cmd/geth/main, les/fletcher: added in light mode support

---
 cmd/geth/main.go | 12 ++++++++++++
 les/fetcher.go   |  1 +
 2 files changed, 13 insertions(+)

diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index e91fcf6576..2544ecfaeb 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -34,6 +34,7 @@ import (
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/console"
 	"github.com/ethereum/go-ethereum/eth"
+	"github.com/ethereum/go-ethereum/les"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/ethereum/go-ethereum/internal/debug"
 	"github.com/ethereum/go-ethereum/log"
@@ -322,7 +323,18 @@ func startNode(ctx *cli.Context, stack *node.Node) {
 	if exitWhenSynced := ctx.GlobalDuration(utils.ExitWhenSyncedFlag.Name); exitWhenSynced >= 0 {
 		go func() {
 						//TODO addd in light mode support
+						log.Info("🔗 block Synced 🔗 ")
+
 						if ctx.GlobalBool(utils.LightModeFlag.Name) || ctx.GlobalString(utils.SyncModeFlag.Name) == "light" {
+							 var lightEthereum *les.LightEthereum
+							if err := stack.Service(&lightEthereum); err != nil {
+								utils.Fatalf("LightEthereum service not running: %v", err)
+							}
+							<-lightEthereum.Downloader().SyncedCh
+							log.Info("Synchronisation completed, exitting", "countdown", exitWhenSynced)
+							time.Sleep(exitWhenSynced)
+							stack.Stop()
+
 
 						} else {
 							var ethereum *eth.Ethereum
diff --git a/les/fetcher.go b/les/fetcher.go
index eff58b8711..280247300c 100644
--- a/les/fetcher.go
+++ b/les/fetcher.go
@@ -447,6 +447,7 @@ func (f *lightFetcher) nextRequest() (*distReq, uint64) {
 					p.Log().Debug("Synchronisation started")
 					f.pm.synchronise(p)
 					f.syncDone <- p
+					f.SyncedCh <- true
 				}()
 				return nil
 			},