Add Inner Ring code

pkg/core/netmap/epoch/marshal.go

@@ -0,0 +1,37 @@
+package epoch
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+// Size is a size of Epoch
+// in a binary form.
+const Size = 8
+
+// Marshal encodes Epoch into a
+// binary form and returns the result.
+//
+// Result slice has Size length.
+func Marshal(e Epoch) []byte {
+	d := make([]byte, Size)
+
+	binary.BigEndian.PutUint64(d, ToUint64(e))
+
+	return d
+}
+
+// UnmarshalBinary unmarshals Epoch from
+// a binary representation.
+//
+// If buffer size is insufficient,
+// io.ErrUnexpectedEOF is returned.
+func (e *Epoch) UnmarshalBinary(data []byte) error {
+	if len(data) < Size {
+		return io.ErrUnexpectedEOF
+	}
+
+	*e = FromUint64(binary.BigEndian.Uint64(data))
+
+	return nil
+}