lnrpc/peers: skeleton logic for updateNodeAnnouncement

Basic logic for the endpoint:

- Get the current nodeAnn information
- Calculate modifications
- Apply modifications
- Return changes

subrpcserver_config.go

@@ -2,6 +2,7 @@ package lnd
 
 import (
 	"fmt"
+	"net"
 	"reflect"
 
 	"github.com/btcsuite/btcd/chaincfg"
@@ -16,6 +17,7 @@ import (
 	"github.com/lightningnetwork/lnd/lnrpc/chainrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/devrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/invoicesrpc"
+	"github.com/lightningnetwork/lnd/lnrpc/peersrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/signrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/walletrpc"
@@ -60,6 +62,10 @@ type subRPCServerConfigs struct {
 	// as a gRPC service.
 	InvoicesRPC *invoicesrpc.Config `group:"invoicesrpc" namespace:"invoicesrpc"`
 
+	// PeersRPC is a sub-RPC server that exposes peer related methods
+	// as a gRPC service.
+	PeersRPC *peersrpc.Config `group:"peersrpc" namespace:"peersrpc"`
+
 	// 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
@@ -107,6 +113,9 @@ func (s *subRPCServerConfigs) PopulateDependencies(cfg *Config,
 	tcpResolver lncfg.TCPResolver,
 	genInvoiceFeatures func() *lnwire.FeatureVector,
 	genAmpInvoiceFeatures func() *lnwire.FeatureVector,
+	getNodeAnnouncement func() (lnwire.NodeAnnouncement, error),
+	updateNodeAnnouncement func(modifiers ...netann.NodeAnnModifier) error,
+	parseAddr func(addr string) (net.Addr, error),
 	rpcLogger btclog.Logger) error {
 
 	// First, we'll use reflect to obtain a version of the config struct
@@ -287,6 +296,21 @@ func (s *subRPCServerConfigs) PopulateDependencies(cfg *Config,
 				reflect.ValueOf(graphDB),
 			)
 
+		case *peersrpc.Config:
+			subCfgValue := extractReflectValue(subCfg)
+
+			subCfgValue.FieldByName("GetNodeAnnouncement").Set(
+				reflect.ValueOf(getNodeAnnouncement),
+			)
+
+			subCfgValue.FieldByName("ParseAddr").Set(
+				reflect.ValueOf(parseAddr),
+			)
+
+			subCfgValue.FieldByName("UpdateNodeAnnouncement").Set(
+				reflect.ValueOf(updateNodeAnnouncement),
+			)
+
 		default:
 			return fmt.Errorf("unknown field: %v, %T", fieldName,
 				cfg)