macaroons: add macaroons package and update glide

macaroons/service.go

@@ -0,0 +1,44 @@
+package macaroons
+
+import (
+	"path"
+
+	"gopkg.in/macaroon-bakery.v1/bakery"
+
+	"github.com/boltdb/bolt"
+)
+
+var (
+	// dbFileName is the filename within the data directory which contains
+	// the macaroon stores.
+	dbFilename = "macaroons.db"
+)
+
+// NewService returns a service backed by the macaroon Bolt DB stored in the
+// passed directory.
+func NewService(dir string) (*bakery.Service, error) {
+	// Open the database.
+	macaroonDB, err := bolt.Open(path.Join(dir, dbFilename), 0600,
+		bolt.DefaultOptions)
+	if err != nil {
+		return nil, err
+	}
+	rootKeyStore, err := NewRootKeyStorage(macaroonDB)
+	if err != nil {
+		return nil, err
+	}
+	macaroonStore, err := NewStorage(macaroonDB)
+	if err != nil {
+		return nil, err
+	}
+	macaroonParams := bakery.NewServiceParams{
+		Location:     "lnd",
+		Store:        macaroonStore,
+		RootKeyStore: rootKeyStore,
+		// No third-party caveat support for now.
+		// TODO(aakselrod): Add third-party caveat support.
+		Locator: nil,
+		Key:     nil,
+	}
+	return bakery.NewService(macaroonParams)
+}