// Encode
func (e *Encoder) Encode(m raftpb.Message) error {
var buf [4]byte
b := buf[:4]
s := m.Size()
if s == 0 {
return ErrEmptyMessage
}
binary.BigEndian.PutUint32(b, uint32(s))
e.w.Write(b)
e.off += 4
b, err := m.Marshal()
if err != nil {
return err
}
e.w.Write(b)
e.off += s
return nil
}
