Merge pull request #3837 from cfromknecht/node-features-rpc

lnrpc: display node and peer features via rpc

lnrpc/invoicesrpc/utils.go

@@ -128,16 +128,19 @@ func CreateRPCInvoice(invoice *channeldb.Invoice,
 }
 
 // CreateRPCFeatures maps a feature vector into a list of lnrpc.Features.
-func CreateRPCFeatures(fv *lnwire.FeatureVector) []*lnrpc.Feature {
+func CreateRPCFeatures(fv *lnwire.FeatureVector) map[uint32]*lnrpc.Feature {
+	if fv == nil {
+		return nil
+	}
+
 	features := fv.Features()
-	rpcFeatures := make([]*lnrpc.Feature, 0, len(features))
+	rpcFeatures := make(map[uint32]*lnrpc.Feature, len(features))
 	for bit := range features {
-		rpcFeatures = append(rpcFeatures, &lnrpc.Feature{
-			Bit:        uint32(bit),
+		rpcFeatures[uint32(bit)] = &lnrpc.Feature{
 			Name:       fv.Name(bit),
 			IsRequired: bit.IsRequired(),
 			IsKnown:    fv.IsKnown(bit),
-		})
+		}
 	}
 
 	return rpcFeatures

lnrpc/rpc.proto

@@ -1449,6 +1449,9 @@ message Peer {
 
     // The type of sync we are currently performing with this peer.
     SyncType sync_type = 10 [json_name = "sync_type"];
+
+    /// Features advertised by the remote peer in their init message.
+    map<uint32, Feature> features = 11 [json_name = "features"];
 }
 
 message ListPeersRequest {
@@ -2069,6 +2072,7 @@ message LightningNode {
     string alias = 3 [ json_name = "alias" ];
     repeated NodeAddress addresses = 4 [ json_name = "addresses" ];
     string color = 5 [ json_name = "color" ];
+    map<uint32, Feature> features = 6 [ json_name = "features" ];
 }
 
 message NodeAddress {
@@ -2373,7 +2377,7 @@ message Invoice {
     repeated InvoiceHTLC htlcs = 22 [json_name = "htlcs"];
 
     /// List of features advertised on the invoice.
-    repeated Feature features = 24 [json_name = "features"];
+    map<uint32, Feature> features = 24 [json_name = "features"];
 }
 
 enum InvoiceHTLCState {
@@ -2634,11 +2638,10 @@ message PayReq {
     repeated RouteHint route_hints = 10 [json_name = "route_hints"];
     bytes payment_addr = 11 [json_name = "payment_addr"];
     int64 num_msat = 12 [json_name = "num_msat"];
-    repeated Feature features = 13 [json_name = "features"];
+    map<uint32, Feature> features = 13 [json_name = "features"];
 }
 
 message Feature {
-        uint32 bit = 1 [json_name = "bit"];
         string name = 2 [json_name = "name"];
         bool is_required = 3 [json_name = "is_required"];
         bool is_known = 4 [json_name = "is_known"];

lnrpc/rpc.swagger.json

@@ -2246,10 +2246,6 @@
     "lnrpcFeature": {
       "type": "object",
       "properties": {
-        "bit": {
-          "type": "integer",
-          "format": "int64"
-        },
         "name": {
           "type": "string"
         },
@@ -2804,8 +2800,8 @@
           "description": "/ List of HTLCs paying to this invoice [EXPERIMENTAL]."
         },
         "features": {
-          "type": "array",
-          "items": {
+          "type": "object",
+          "additionalProperties": {
             "$ref": "#/definitions/lnrpcFeature"
           },
           "description": "/ List of features advertised on the invoice."
@@ -2913,6 +2909,12 @@
         },
         "color": {
           "type": "string"
+        },
+        "features": {
+          "type": "object",
+          "additionalProperties": {
+            "$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."
@@ -3305,8 +3307,8 @@
           "format": "int64"
         },
         "features": {
-          "type": "array",
-          "items": {
+          "type": "object",
+          "additionalProperties": {
             "$ref": "#/definitions/lnrpcFeature"
           }
         }
@@ -3431,6 +3433,13 @@
         "sync_type": {
           "$ref": "#/definitions/PeerSyncType",
           "description": "The type of sync we are currently performing with this peer."
+        },
+        "features": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/lnrpcFeature"
+          },
+          "description": "/ Features advertised by the remote peer in their init message."
         }
       }
     },

rpcserver.go

@@ -2258,6 +2258,10 @@ func (r *rpcServer) ListPeers(ctx context.Context,
 			}
 		}
 
+		features := invoicesrpc.CreateRPCFeatures(
+			serverPeer.RemoteFeatures(),
+		)
+
 		peer := &lnrpc.Peer{
 			PubKey:    hex.EncodeToString(nodePub[:]),
 			Address:   serverPeer.conn.RemoteAddr().String(),
@@ -2268,6 +2272,7 @@ func (r *rpcServer) ListPeers(ctx context.Context,
 			SatRecv:   satRecv,
 			PingTime:  serverPeer.PingTime(),
 			SyncType:  lnrpcSyncType,
+			Features:  features,
 		}
 
 		resp.Peers = append(resp.Peers, peer)
@@ -3956,6 +3961,7 @@ 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 +4143,8 @@ 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 +4152,7 @@ func (r *rpcServer) GetNodeInfo(ctx context.Context,
 			Addresses:  nodeAddrs,
 			Alias:      node.Alias,
 			Color:      routing.EncodeHexColor(node.Color),
+			Features:   features,
 		},
 		NumChannels:   numChannels,
 		TotalCapacity: int64(totalCapacity),