lnrpc: update grpc-gateway library to v2

lnd.go

@@ -25,12 +25,13 @@ import (
 	"github.com/btcsuite/btcutil"
 	"github.com/btcsuite/btcwallet/wallet"
 	"github.com/btcsuite/btcwallet/walletdb"
-	proxy "github.com/grpc-ecosystem/grpc-gateway/runtime"
+	proxy "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
 	"github.com/lightninglabs/neutrino"
 	"github.com/lightninglabs/neutrino/headerfs"
 	"golang.org/x/crypto/acme/autocert"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/protobuf/encoding/protojson"
 	"gopkg.in/macaroon-bakery.v2/bakery"
 	"gopkg.in/macaroon.v2"
 
@@ -1412,8 +1413,10 @@ func startRestProxy(cfg *Config, rpcServer *rpcServer, restDialOpts []grpc.DialO
 	// that the marshaler prints all values, even if they are falsey.
 	customMarshalerOption := proxy.WithMarshalerOption(
 		proxy.MIMEWildcard, &proxy.JSONPb{
-			OrigName:     true,
-			EmitDefaults: true,
+			MarshalOptions: protojson.MarshalOptions{
+				UseProtoNames:   true,
+				EmitUnpopulated: true,
+			},
 		},
 	)
 	mux := proxy.NewServeMux(customMarshalerOption)