fix: remove noisy errors about nil result

Author: 0x416e746f6e

cmd/serve.go

@@ -61,7 +61,6 @@ func CommandServe(cfg *config.Config) *cli.Command {
 			EnvVars:     []string{envPrefix + strings.ToUpper(categoryL1) + "_RPC"},
 			Name:        categoryL1 + "-rpc",
 			Usage:       "`url` of l1 rpc endpoint",
-			Value:       "http://127.0.0.1:8545",
 		},
 
 		&cli.StringSliceFlag{ // --l1-rpc-fallback

rpc/rpc.go

@@ -276,9 +276,11 @@ func (rpc *RPC) SendTransaction(ctx context.Context, tx *ethtypes.Transaction) e
 	}
 	rawTx := hexutil.Encode(data)
 	return callMainThenFallback(ctx, rpc, func(ctx context.Context, cli *ethclient.Client) error {
+		var txhash hexutil.Bytes
 		return rpc.callCheckingNetworkID(ctx, cli, ethrpc.BatchElem{
 			Method: "eth_sendRawTransaction",
 			Args:   []interface{}{rawTx},
+			Result: &txhash,
 		})
 	})
 }

server/server.go

@@ -35,23 +35,25 @@ type Server struct {
 }
 
 func New(cfg *config.Config) (*Server, error) {
-	l1, err := newL1(cfg.L1)
-	if err != nil {
-		return nil, err
+	s := &Server{
+		cfg:     cfg,
+		failure: make(chan error, 1),
+		logger:  zap.L(),
+	}
+
+	if cfg.L1.Rpc != "" {
+		l1, err := newL1(cfg.L1)
+		if err != nil {
+			return nil, err
+		}
+		s.l1 = l1
 	}
 
 	l2, err := newL2(cfg.L2)
 	if err != nil {
 		return nil, err
 	}
-
-	s := &Server{
-		cfg:     cfg,
-		failure: make(chan error, 1),
-		l1:      l1,
-		l2:      l2,
-		logger:  zap.L(),
-	}
+	s.l2 = l2
 
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", s.handleHealthcheck)
@@ -104,7 +106,9 @@ func (s *Server) Run() error {
 	}()
 
 	{ // run the monitors
-		s.l1.run(ctx)
+		if s.l1 != nil {
+			s.l1.run(ctx)
+		}
 		s.l2.run(ctx)
 	}
 
@@ -140,7 +144,9 @@ func (s *Server) Run() error {
 
 	{ // stop the monitors
 		s.l2.stop()
-		s.l1.stop()
+		if s.l1 != nil {
+			s.l1.stop()
+		}
 	}
 
 	{ // stop the server
@@ -154,8 +160,10 @@ func (s *Server) Run() error {
 	}
 
 	{ // close the rpc clients
-		s.l1.rpc.Close()
 		s.l2.rpc.Close()
+		if s.l1 != nil {
+			s.l1.rpc.Close()
+		}
 	}
 
 	return utils.FlattenErrors(errs)