multi: specify DB filename when opening clientdb

To make it possible to open any DB in the debug CLI, we allow specifying
the file name too instead of only the path.

clientdb/account_test.go

@@ -51,7 +51,7 @@ func newTestDB(t *testing.T) (*DB, func()) {
 		t.Fatalf("unable to create temp dir: %v", err)
 	}
 
-	db, err := New(tempDir)
+	db, err := New(tempDir, DBFilename)
 	if err != nil {
 		os.RemoveAll(tempDir)
 		t.Fatalf("unable to create new db: %v", err)

clientdb/db.go

@@ -9,8 +9,8 @@ import (
 )
 
 const (
-	// dbFilename is the default filename of the client database.
-	dbFilename = "pool.db"
+	// DBFilename is the default filename of the client database.
+	DBFilename = "pool.db"
 
 	// dbFilePermission is the default permission the client database file
 	// is created with.
@@ -29,9 +29,9 @@ type DB struct {
 }
 
 // New creates a new bolt database that can be found at the given directory.
-func New(dir string) (*DB, error) {
+func New(dir, fileName string) (*DB, error) {
 	firstInit := false
-	path := filepath.Join(dir, dbFilename)
+	path := filepath.Join(dir, fileName)
 
 	// If the database file does not exist yet, create its directory.
 	if !fileExists(path) {

fundingmgr_test.go

@@ -199,7 +199,7 @@ func newManagerHarness(t *testing.T) *managerHarness {
 	tempDir, err := ioutil.TempDir("", "client-db")
 	require.NoError(t, err)
 
-	db, err := clientdb.New(tempDir)
+	db, err := clientdb.New(tempDir, clientdb.DBFilename)
 	if err != nil {
 		_ = os.RemoveAll(tempDir)
 		t.Fatalf("unable to create new db: %v", err)

server.go

@@ -378,7 +378,7 @@ func (s *Server) setupClient() error {
 
 	// Open the main database.
 	var err error
-	s.db, err = clientdb.New(s.cfg.BaseDir)
+	s.db, err = clientdb.New(s.cfg.BaseDir, clientdb.DBFilename)
 	if err != nil {
 		return err
 	}