lnrpc: add node features to LightningNode and NodeInfo

lnrpc/invoicesrpc/utils.go

@@ -129,6 +129,10 @@ func CreateRPCInvoice(invoice *channeldb.Invoice,
 
 // CreateRPCFeatures maps a feature vector into a list of lnrpc.Features.
 func CreateRPCFeatures(fv *lnwire.FeatureVector) []*lnrpc.Feature {
+	if fv == nil {
+		return nil
+	}
+
 	features := fv.Features()
 	rpcFeatures := make([]*lnrpc.Feature, 0, len(features))
 	for bit := range features {

lnrpc/rpc.proto

@@ -2069,6 +2069,7 @@ message LightningNode {
     string alias = 3 [ json_name = "alias" ];
     repeated NodeAddress addresses = 4 [ json_name = "addresses" ];
     string color = 5 [ json_name = "color" ];
+    repeated Feature features = 6 [ json_name = "features" ];
 }
 
 message NodeAddress {

lnrpc/rpc.swagger.json

@@ -2913,6 +2913,12 @@
         },
         "color": {
           "type": "string"
+        },
+        "features": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/lnrpcFeature"
+          }
         }
       },
       "description": "*\nAn individual vertex/node within the channel graph. A node is\nconnected to other nodes by one or more channel edges emanating from it. As the\ngraph is directed, a node will also have an incoming edge attached to it for\neach outgoing edge."

rpcserver.go

@@ -3956,6 +3956,7 @@ func (r *rpcServer) DescribeGraph(ctx context.Context,
 			Addresses:  nodeAddrs,
 			Alias:      node.Alias,
 			Color:      routing.EncodeHexColor(node.Color),
+			Features:   invoicesrpc.CreateRPCFeatures(node.Features),
 		})
 
 		return nil
@@ -4137,6 +4138,8 @@ func (r *rpcServer) GetNodeInfo(ctx context.Context,
 		nodeAddrs = append(nodeAddrs, nodeAddr)
 	}
 
+	features := invoicesrpc.CreateRPCFeatures(node.Features)
+
 	return &lnrpc.NodeInfo{
 		Node: &lnrpc.LightningNode{
 			LastUpdate: uint32(node.LastUpdate.Unix()),
@@ -4144,6 +4147,7 @@ func (r *rpcServer) GetNodeInfo(ctx context.Context,
 			Addresses:  nodeAddrs,
 			Alias:      node.Alias,
 			Color:      routing.EncodeHexColor(node.Color),
+			Features:   features,
 		},
 		NumChannels:   numChannels,
 		TotalCapacity: int64(totalCapacity),