les: implement ultralight client (#16904)

For more information about this light client mode, read https://hackmd.io/s/HJy7jjZpm
2019-01-24 14:18:26 +03:00
parent b8f9b3779f
commit 769657060e
23 changed files with 1288 additions and 179 deletions
--- a/les/odr.go
+++ b/les/odr.go
@ -109,7 +109,10 @@ func (odr *LesOdr) Retrieve(ctx context.Context, req light.OdrRequest) (err erro
 		},
 		canSend: func(dp distPeer) bool {
 			p := dp.(*peer)
-			return lreq.CanSend(p)
+			if !p.isOnlyAnnounce {
+				return lreq.CanSend(p)
+			}
+			return false
 		},
 		request: func(dp distPeer) func() {
 			p := dp.(*peer)