lndclient: Add the watchtower client service

Add the watchtower client service to the macaroon recipe and to the main
lnd services.

Author: Jontified

lnd_services.go

@@ -180,6 +180,7 @@ type LndServices struct {
 	Router        RouterClient
 	Versioner     VersionerClient
 	State         StateClient
+	WtClient      WatchtowerClientClient
 
 	ChainParams *chaincfg.Params
 	NodeAlias   string
@@ -385,6 +386,9 @@ func NewLndServices(cfg *LndServicesConfig) (*GrpcLndServices, error) {
 	routerClient := newRouterClient(
 		conn, macaroons[RouterServiceMac], timeout,
 	)
+	wtClientClient := newWtClientClient(
+		conn, macaroons[WalletKitServiceMac], timeout,
+	)
 
 	cleanup := func() {
 		log.Debugf("Closing lnd connection")
@@ -416,6 +420,7 @@ func NewLndServices(cfg *LndServicesConfig) (*GrpcLndServices, error) {
 			Router:        routerClient,
 			Versioner:     versionerClient,
 			State:         stateClient,
+			WtClient:      wtClientClient,
 			ChainParams:   chainParams,
 			NodeAlias:     nodeAlias,
 			NodePubkey:    route.Vertex(nodeKey),

macaroon_recipes.go

@@ -21,6 +21,7 @@ var (
 		"signrpc":     (*SignerClient)(nil),
 		"verrpc":      (*VersionerClient)(nil),
 		"walletrpc":   (*WalletKitClient)(nil),
+		"wtclientrpc": (*WatchtowerClientClient)(nil),
 	}
 
 	// renames is a map of renamed RPC method names. The key is the name as