split db and bolt to store interface

pkg/store/marshal.go

@@ -0,0 +1,28 @@
+package store
+
+import (
+	"bytes"
+	"encoding/gob"
+)
+
+type Marshaler interface {
+	Marshal(v interface{}) ([]byte, error)
+	Unmarshal(data []byte, v interface{}) error
+}
+
+type gobMarshaler struct{}
+
+func NewGOB() Marshaler {
+	return gobMarshaler{}
+}
+
+func (gobMarshaler) Marshal(v interface{}) (b []byte, err error) {
+	buf := new(bytes.Buffer)
+	err = gob.NewEncoder(buf).Encode(v)
+	b = buf.Bytes()
+	return
+}
+
+func (gobMarshaler) Unmarshal(data []byte, v interface{}) error {
+	return gob.NewDecoder(bytes.NewBuffer(data)).Decode(v)
+}