lnrpc+lncli: add feature bits to GetInfo

cmd/lncli/commands.go

@@ -1965,6 +1965,7 @@ func getInfo(ctx *cli.Context) error {
 		Testnet             bool                      `json:"testnet"`
 		Chains              []chain                   `json:"chains"`
 		Uris                []string                  `json:"uris"`
+		Features            map[uint32]*lnrpc.Feature `json:"features"`
 	}{
 		Version:             resp.Version,
 		IdentityPubkey:      resp.IdentityPubkey,
@@ -1982,6 +1983,7 @@ func getInfo(ctx *cli.Context) error {
 		Testnet:             resp.Testnet,
 		Chains:              chains,
 		Uris:                resp.Uris,
+		Features:            resp.Features,
 	})
 	return nil
 }

lnrpc/rpc.proto

@@ -1539,6 +1539,12 @@ message GetInfoResponse {
 
     // Whether we consider ourselves synced with the public channel graph.
     bool synced_to_graph = 18 [json_name = "synced_to_graph"];
+
+    /*
+    Features that our node has advertised in our init message, node
+    announcements and invoices.
+    */
+    map<uint32, Feature> features = 19 [json_name = "features"];
 }
 
 message Chain {

lnrpc/rpc.swagger.json

@@ -2504,6 +2504,13 @@
           "type": "boolean",
           "format": "boolean",
           "description": "Whether we consider ourselves synced with the public channel graph."
+        },
+        "features": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/lnrpcFeature"
+          },
+          "description": "Features that our node has advertised in our init message, node\nannouncements and invoices."
         }
       }
     },

rpcserver.go

@@ -2215,6 +2215,22 @@ func (r *rpcServer) GetInfo(ctx context.Context,
 
 	isGraphSynced := r.server.authGossiper.SyncManager().IsGraphSynced()
 
+	features := make(map[uint32]*lnrpc.Feature)
+	sets := r.server.featureMgr.ListSets()
+
+	for _, set := range sets {
+		// Get the a list of lnrpc features for each set we support.
+		featureVector := r.server.featureMgr.Get(set)
+		rpcFeatures := invoicesrpc.CreateRPCFeatures(featureVector)
+
+		// Add the features to our map of features, allowing over writing of
+		// existing values because features in different sets with the same bit
+		// are duplicated across sets.
+		for bit, feature := range rpcFeatures {
+			features[bit] = feature
+		}
+	}
+
 	// TODO(roasbeef): add synced height n stuff
 	return &lnrpc.GetInfoResponse{
 		IdentityPubkey:      encodedIDPub,
@@ -2233,6 +2249,7 @@ func (r *rpcServer) GetInfo(ctx context.Context,
 		BestHeaderTimestamp: int64(bestHeaderTimestamp),
 		Version:             build.Version(),
 		SyncedToGraph:       isGraphSynced,
+		Features:            features,
 	}, nil
 }