lnrpc: display remote peer features via rpc

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.
+    repeated Feature features = 11 [json_name = "features"];
 }
 
 message ListPeersRequest {

lnrpc/rpc.swagger.json

@@ -3437,6 +3437,13 @@
         "sync_type": {
           "$ref": "#/definitions/PeerSyncType",
           "description": "The type of sync we are currently performing with this peer."
+        },
+        "features": {
+          "type": "array",
+          "items": {
+            "$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)