x

config.go

@@ -694,6 +694,7 @@ func DefaultConfig() Config {
 			MaxChannelUpdateBurst: discovery.DefaultMaxChannelUpdateBurst,
 			ChannelUpdateInterval: discovery.DefaultChannelUpdateInterval,
 			SubBatchDelay:         discovery.DefaultSubBatchDelay,
+			AnnouncementConf:      discovery.DefaultProofMatureDelta,
 		},
 		Invoices: &lncfg.Invoices{
 			HoldExpiryDelta: lncfg.DefaultHoldInvoiceExpiryDelta,

discovery/gossiper.go

@@ -62,6 +62,11 @@ const (
 	// we'll maintain. This is the global size across all peers. We'll
 	// allocate ~3 MB max to the cache.
 	maxRejectedUpdates = 10_000
+
+	// DefaultProofMatureDelta specifies the default value used for
+	// ProofMatureDelta, which is the number of confirmations needed before
+	// processing the announcement signatures.
+	DefaultProofMatureDelta = 5
 )
 
 var (
@@ -1984,8 +1989,6 @@ func (d *AuthenticatedGossiper) addNode(msg *lnwire.NodeAnnouncement,
 // NOTE: must be used inside a lock.
 func (d *AuthenticatedGossiper) isPremature(chanID lnwire.ShortChannelID,
 	delta uint32, msg *networkMsg) bool {
-	// TODO(roasbeef) make height delta 6
-	//  * or configurable
 
 	msgHeight := chanID.BlockHeight + delta
 

docs/release-notes/release-notes-0.19.0.md

@@ -204,6 +204,10 @@ config option](https://github.com/lightningnetwork/lnd/pull/9182) and introduce
 a new option `channel-max-fee-exposure` which is unambiguous in its description.
 The underlying functionality between those two options remain the same.
 
+* [Make](https://github.com/lightningnetwork/lnd/pull/9405) the param
+`ProofMatureDelta` used in gossip to be configurable via
+`--gossip.announcement-conf`, with a default value of 6.
+
 ## Breaking Changes
 ## Performance Improvements
 

lncfg/gossip.go

@@ -18,6 +18,8 @@ type Gossip struct {
 	ChannelUpdateInterval time.Duration `long:"channel-update-interval" description:"The interval used to determine how often lnd should allow a burst of new updates for a specific channel and direction."`
 
 	SubBatchDelay time.Duration `long:"sub-batch-delay" description:"The duration to wait before sending the next announcement batch if there are multiple. Use a small value if there are a lot announcements and they need to be broadcast quickly."`
+
+	AnnouncementConf uint32 `long:"announcement-conf" description:"The number of confirmations required before processing channel announcements."`
 }
 
 // Parse the pubkeys for the pinned syncers.

sample-lnd.conf

@@ -1729,6 +1729,8 @@
 ; be broadcast quickly.
 ; gossip.sub-batch-delay=5s
 
+; The number of confirmations required before processing channel announcements.
+; gossip.announcement-conf=6
 
 [invoices]
 

server.go

@@ -1118,7 +1118,7 @@ func newServer(cfg *Config, listenAddrs []net.Addr,
 
 			return s.genNodeAnnouncement(nil)
 		},
-		ProofMatureDelta:        0,
+		ProofMatureDelta:        cfg.Gossip.AnnouncementConf,
 		TrickleDelay:            time.Millisecond * time.Duration(cfg.TrickleDelay),
 		RetransmitTicker:        ticker.New(time.Minute * 30),
 		RebroadcastInterval:     time.Hour * 24,