multi: enable optional route blinding feature

Author: carlaKC

feature/default_sets.go

@@ -79,6 +79,11 @@ var defaultSetDesc = setDesc{
 		SetInit:    {}, // I
 		SetNodeAnn: {}, // N
 	},
+	lnwire.RouteBlindingOptional: {
+		SetInit:    {}, // I
+		SetNodeAnn: {}, // N
+		SetInvoice: {}, // 9
+	},
 	lnwire.ShutdownAnySegwitOptional: {
 		SetInit:    {}, // I
 		SetNodeAnn: {}, // N

feature/deps.go

@@ -79,6 +79,12 @@ var deps = depDesc{
 		lnwire.AnchorsZeroFeeHtlcTxOptional: {},
 		lnwire.ExplicitChannelTypeOptional:  {},
 	},
+	lnwire.RouteBlindingOptional: {
+		lnwire.TLVOnionPayloadOptional: {},
+	},
+	lnwire.RouteBlindingRequired: {
+		lnwire.TLVOnionPayloadRequired: {},
+	},
 }
 
 // ValidateDeps asserts that a feature vector sets all features and their

feature/manager.go

@@ -60,6 +60,9 @@ type Config struct {
 	// segwit witness versions for co-op closes.
 	NoAnySegwit bool
 
+	// NoRouteBlinding unsets route blinding feature bits.
+	NoRouteBlinding bool
+
 	// CustomFeatures is a set of custom features to advertise in each
 	// set.
 	CustomFeatures map[Set][]lnwire.FeatureBit
@@ -123,6 +126,8 @@ func newManager(cfg Config, desc setDesc) (*Manager, error) {
 			raw.Unset(lnwire.PaymentAddrRequired)
 			raw.Unset(lnwire.MPPOptional)
 			raw.Unset(lnwire.MPPRequired)
+			raw.Unset(lnwire.RouteBlindingOptional)
+			raw.Unset(lnwire.RouteBlindingRequired)
 			raw.Unset(lnwire.AMPOptional)
 			raw.Unset(lnwire.AMPRequired)
 			raw.Unset(lnwire.KeysendOptional)
@@ -179,7 +184,10 @@ func newManager(cfg Config, desc setDesc) (*Manager, error) {
 			raw.Unset(lnwire.SimpleTaprootChannelsOptionalStaging)
 			raw.Unset(lnwire.SimpleTaprootChannelsRequiredStaging)
 		}
-
+		if cfg.NoRouteBlinding {
+			raw.Unset(lnwire.RouteBlindingOptional)
+			raw.Unset(lnwire.RouteBlindingRequired)
+		}
 		for _, custom := range cfg.CustomFeatures[set] {
 			if custom > set.Maximum() {
 				return nil, fmt.Errorf("feature bit: %v "+

lnrpc/lightning.pb.go

@@ -4311,6 +4311,8 @@ enum FeatureBit {
     ANCHORS_OPT = 21;
     ANCHORS_ZERO_FEE_HTLC_REQ = 22;
     ANCHORS_ZERO_FEE_HTLC_OPT = 23;
+    ROUTE_BLINDING_REQUIRED = 24;
+    ROUTE_BLINDING_OPTIONAL = 25;
     AMP_REQ = 30;
     AMP_OPT = 31;
 }

lnrpc/lightning.proto

@@ -1470,6 +1470,8 @@
                 "ANCHORS_OPT",
                 "ANCHORS_ZERO_FEE_HTLC_REQ",
                 "ANCHORS_ZERO_FEE_HTLC_OPT",
+                "ROUTE_BLINDING_REQUIRED",
+                "ROUTE_BLINDING_OPTIONAL",
                 "AMP_REQ",
                 "AMP_OPT"
               ]
@@ -4694,6 +4696,8 @@
         "ANCHORS_OPT",
         "ANCHORS_ZERO_FEE_HTLC_REQ",
         "ANCHORS_ZERO_FEE_HTLC_OPT",
+        "ROUTE_BLINDING_REQUIRED",
+        "ROUTE_BLINDING_OPTIONAL",
         "AMP_REQ",
         "AMP_OPT"
       ],

lnrpc/lightning.swagger.json

@@ -77,6 +77,8 @@
         "ANCHORS_OPT",
         "ANCHORS_ZERO_FEE_HTLC_REQ",
         "ANCHORS_ZERO_FEE_HTLC_OPT",
+        "ROUTE_BLINDING_REQUIRED",
+        "ROUTE_BLINDING_OPTIONAL",
         "AMP_REQ",
         "AMP_OPT"
       ],

lnrpc/peersrpc/peers.swagger.json

@@ -772,6 +772,8 @@
         "ANCHORS_OPT",
         "ANCHORS_ZERO_FEE_HTLC_REQ",
         "ANCHORS_ZERO_FEE_HTLC_OPT",
+        "ROUTE_BLINDING_REQUIRED",
+        "ROUTE_BLINDING_OPTIONAL",
         "AMP_REQ",
         "AMP_OPT"
       ],

lnrpc/routerrpc/router.swagger.json

@@ -141,6 +141,14 @@ const (
 	// transactions, which also imply anchor commitments.
 	AnchorsZeroFeeHtlcTxOptional FeatureBit = 23
 
+	// RouteBlindingRequired is a required feature bit that signals that
+	// the node supports blinded payments.
+	RouteBlindingRequired FeatureBit = 24
+
+	// RouteBlindingOptional is an optional feature bit that signals that
+	// the node supports blinded payments.
+	RouteBlindingOptional FeatureBit = 25
+
 	// ShutdownAnySegwitRequired is an required feature bit that signals
 	// that the sender is able to properly handle/parse segwit witness
 	// programs up to version 16. This enables utilization of Taproot
@@ -315,6 +323,8 @@ var Features = map[FeatureBit]string{
 	ScidAliasOptional:                    "scid-alias",
 	ZeroConfRequired:                     "zero-conf",
 	ZeroConfOptional:                     "zero-conf",
+	RouteBlindingRequired:                "route-blinding",
+	RouteBlindingOptional:                "route-blinding",
 	ShutdownAnySegwitRequired:            "shutdown-any-segwit",
 	ShutdownAnySegwitOptional:            "shutdown-any-segwit",
 	SimpleTaprootChannelsRequiredFinal:   "simple-taproot-chans",

lnwire/features.go

@@ -549,6 +549,7 @@ func newServer(cfg *Config, listenAddrs []net.Addr,
 		NoAnySegwit:              cfg.ProtocolOptions.NoAnySegwit(),
 		CustomFeatures:           cfg.ProtocolOptions.ExperimentalProtocol.CustomFeatures(),
 		NoTaprootChans:           !cfg.ProtocolOptions.TaprootChans,
+		NoRouteBlinding:          cfg.ProtocolOptions.NoRouteBlinding(),
 	})
 	if err != nil {
 		return nil, err