/
version_metadata_encoding.go
46 lines (40 loc) · 1.15 KB
/
version_metadata_encoding.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package statecouchdb
import (
"encoding/base64"
"github.com/VoneChain-CS/fabric-gm/core/ledger/internal/version"
"github.com/golang/protobuf/proto"
"github.com/pkg/errors"
)
func encodeVersionAndMetadata(version *version.Height, metadata []byte) (string, error) {
if version == nil {
return "", errors.New("nil version not supported")
}
msg := &VersionAndMetadata{
Version: version.ToBytes(),
Metadata: metadata,
}
msgBytes, err := proto.Marshal(msg)
if err != nil {
return "", err
}
return base64.StdEncoding.EncodeToString(msgBytes), nil
}
func decodeVersionAndMetadata(encodedstr string) (*version.Height, []byte, error) {
persistedVersionAndMetadata, err := base64.StdEncoding.DecodeString(encodedstr)
if err != nil {
return nil, nil, err
}
versionAndMetadata := &VersionAndMetadata{}
if err = proto.Unmarshal(persistedVersionAndMetadata, versionAndMetadata); err != nil {
return nil, nil, err
}
ver, _, err := version.NewHeightFromBytes(versionAndMetadata.Version)
if err != nil {
return nil, nil, err
}
return ver, versionAndMetadata.Metadata, nil
}