diff --git a/Makefile b/Makefile
index 7d2cd1f..45ddd9b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,7 @@
 default: lintf
 
+SRC_DIR=./info ./ledger
+
 install:
 	brew install protobuf
 	brew install prototool
@@ -11,3 +13,7 @@ lintf:
 build:
 	prototool all
 	go mod tidy
+	for dir in $(SRC_DIR); \
+	do \
+	go build $$dir; \
+	done
diff --git a/ledger/ledger.go b/ledger/ledger.go
index 064d3ee..c1676ec 100644
--- a/ledger/ledger.go
+++ b/ledger/ledger.go
@@ -5,7 +5,6 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
-	"os"
 	"time"
 
 	ledgerPb "github.com/tron-us/go-btfs-common/protos/ledger"
@@ -131,7 +130,7 @@ func CreateChannel(ctx context.Context, ledgerClient ledgerPb.ChannelsClient, ch
 }
 
 func CloseChannel(ctx context.Context, ledgerClient ledgerPb.ChannelsClient, signedChannelState *ledgerPb.SignedChannelState) error {
-	_, err = ledgerClient.CloseChannel(ctx, signedChannelState)
+	_, err := ledgerClient.CloseChannel(ctx, signedChannelState)
 	if err != nil {
 		return err
 	}