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value_encoding.go
45 lines (40 loc) · 1.19 KB
/
value_encoding.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package stateleveldb
import (
proto "github.com/golang/protobuf/proto"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/statedb"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/statedb/stateleveldb/msgs"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/version"
)
// encodeValue encodes the value, version, and metadata
func encodeValue(v *statedb.VersionedValue) ([]byte, error) {
return proto.Marshal(
&msgs.VersionedValueProto{
VersionBytes: v.Version.ToBytes(),
Value: v.Value,
Metadata: v.Metadata,
},
)
}
// decodeValue decodes the statedb value bytes
func decodeValue(encodedValue []byte) (*statedb.VersionedValue, error) {
msg := &msgs.VersionedValueProto{}
err := proto.Unmarshal(encodedValue, msg)
if err != nil {
return nil, err
}
ver, _, err := version.NewHeightFromBytes(msg.VersionBytes)
if err != nil {
return nil, err
}
val := msg.Value
metadata := msg.Metadata
// protobuf always makes an empty byte array as nil
if val == nil {
val = []byte{}
}
return &statedb.VersionedValue{Version: ver, Value: val, Metadata: metadata}, nil
}