optimize seq, specifying that seq is stored in the only certain unknown

internal/msggateway/encoder.go

@@ -0,0 +1,37 @@
+package msggateway
+
+import (
+	"bytes"
+	"encoding/gob"
+	"github.com/OpenIMSDK/Open-IM-Server/pkg/utils"
+)
+
+type Encoder interface {
+	Encode(data interface{}) ([]byte, error)
+	Decode(encodeData []byte, decodeData interface{}) error
+}
+
+type GobEncoder struct {
+}
+
+func NewGobEncoder() *GobEncoder {
+	return &GobEncoder{}
+}
+func (g *GobEncoder) Encode(data interface{}) ([]byte, error) {
+	buff := bytes.Buffer{}
+	enc := gob.NewEncoder(&buff)
+	err := enc.Encode(data)
+	if err != nil {
+		return nil, err
+	}
+	return buff.Bytes(), nil
+}
+func (g *GobEncoder) Decode(encodeData []byte, decodeData interface{}) error {
+	buff := bytes.NewBuffer(encodeData)
+	dec := gob.NewDecoder(buff)
+	err := dec.Decode(decodeData)
+	if err != nil {
+		return utils.Wrap(err, "")
+	}
+	return nil
+}