lnd: allow large GRPC messages

cmd/lncli/main.go

@@ -39,7 +39,7 @@ var (
 
 	// maxMsgRecvSize is the largest message our client will receive. We
 	// set this to 200MiB atm.
-	maxMsgRecvSize = grpc.MaxCallRecvMsgSize(1 * 1024 * 1024 * 200)
+	maxMsgRecvSize = grpc.MaxCallRecvMsgSize(lnrpc.MaxGrpcMsgSize)
 )
 
 func fatal(err error) {

lnd.go

@@ -268,6 +268,9 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 
 	rpcServerOpts := interceptorChain.CreateServerOpts()
 	serverOpts = append(serverOpts, rpcServerOpts...)
+	serverOpts = append(
+		serverOpts, grpc.MaxRecvMsgSize(lnrpc.MaxGrpcMsgSize),
+	)
 
 	grpcServer := grpc.NewServer(serverOpts...)
 	defer grpcServer.Stop()
@@ -771,7 +774,7 @@ func getTLSConfig(cfg *Config) ([]grpc.ServerOption, []grpc.DialOption,
 	restDialOpts := []grpc.DialOption{
 		grpc.WithTransportCredentials(restCreds),
 		grpc.WithDefaultCallOptions(
-			grpc.MaxCallRecvMsgSize(1 * 1024 * 1024 * 200),
+			grpc.MaxCallRecvMsgSize(lnrpc.MaxGrpcMsgSize),
 		),
 	}
 

lnrpc/metadata.go

@@ -14,4 +14,8 @@ var (
 		regexp.MustCompile("^/v1/channels/transaction-stream$"),
 		regexp.MustCompile("^/v2/router/htlcinterceptor$"),
 	}
+
+	// MaxGrpcMsgSize is used when we configure both server and clients to
+	// allow sending/receiving at most 200 MiB GRPC messages.
+	MaxGrpcMsgSize = 200 * 1024 * 1024
 )