config: add sub-server config parsing logic for the new Router service

rpcserver.go

@@ -405,7 +405,7 @@ func newRPCServer(s *server, macService *macaroons.Service,
 	// the dependencies they need are properly populated within each sub
 	// server configuration struct.
 	err := subServerCgs.PopulateDependencies(
-		s.cc, networkDir, macService, atpl,
+		s.cc, networkDir, macService, atpl, s.chanRouter,
 	)
 	if err != nil {
 		return nil, err

subrpcserver_config.go

@@ -6,9 +6,11 @@ import (
 
 	"github.com/lightningnetwork/lnd/autopilot"
 	"github.com/lightningnetwork/lnd/lnrpc/autopilotrpc"
+	"github.com/lightningnetwork/lnd/lnrpc/routerpc"
 	"github.com/lightningnetwork/lnd/lnrpc/signrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/walletrpc"
 	"github.com/lightningnetwork/lnd/macaroons"
+	"github.com/lightningnetwork/lnd/routing"
 )
 
 // subRPCServerConfigs is special sub-config in the main configuration that
@@ -31,6 +33,12 @@ type subRPCServerConfigs struct {
 	// AutopilotRPC is a sub-RPC server that exposes methods on the running
 	// autopilot as a gRPC service.
 	AutopilotRPC *autopilotrpc.Config `group:"autopilotrpc" namespace:"autopilotrpc"`
+
+	// RouterRPC is a sub-RPC server the exposes functionality that allows
+	// clients to send payments on the network, and perform Lightning
+	// payment related queries such as requests for estimates of off-chain
+	// fees.
+	RouterRPC *routerpc.Config `group:"routerpc" namespace:"routerpc"`
 }
 
 // PopulateDependencies attempts to iterate through all the sub-server configs
@@ -41,7 +49,7 @@ type subRPCServerConfigs struct {
 // FetchConfig method.
 func (s *subRPCServerConfigs) PopulateDependencies(cc *chainControl,
 	networkDir string, macService *macaroons.Service,
-	atpl *autopilot.Manager) error {
+	atpl *autopilot.Manager, chanRouter *routing.ChannelRouter) error {
 
 	// First, we'll use reflect to obtain a version of the config struct
 	// that allows us to programmatically inspect its fields.
@@ -106,6 +114,22 @@ func (s *subRPCServerConfigs) PopulateDependencies(cc *chainControl,
 				reflect.ValueOf(atpl),
 			)
 
+		case *routerpc.Config:
+			subCfgValue := extractReflectValue(cfg)
+
+			subCfgValue.FieldByName("NetworkDir").Set(
+				reflect.ValueOf(networkDir),
+			)
+			subCfgValue.FieldByName("ActiveNetParams").Set(
+				reflect.ValueOf(activeNetParams.Params),
+			)
+			subCfgValue.FieldByName("MacService").Set(
+				reflect.ValueOf(macService),
+			)
+			subCfgValue.FieldByName("Router").Set(
+				reflect.ValueOf(chanRouter),
+			)
+
 		default:
 			return fmt.Errorf("unknown field: %v, %T", fieldName,
 				cfg)