/
jetdrop_size.go
85 lines (69 loc) · 2.28 KB
/
jetdrop_size.go
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/*
* Copyright 2019 Insolar Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jet
import (
"bytes"
"context"
"encoding/binary"
"io"
"github.com/insolar/insolar/core"
"github.com/pkg/errors"
"github.com/ugorji/go/codec"
)
func encode(data interface{}) []byte {
var buf bytes.Buffer
enc := codec.NewEncoder(&buf, &codec.CborHandle{})
enc.MustEncode(data)
return buf.Bytes()
}
// DropSize contains info about size of drop
type DropSize struct {
JetID core.RecordID
PulseNo core.PulseNumber
DropSize uint64
Signature []byte
}
func (ds *DropSize) serializeDropSize() []byte {
result := make([]byte, 0, 64)
buff := make([]byte, 8)
binary.LittleEndian.PutUint64(buff, ds.DropSize)
result = append(result, buff...)
buff = make([]byte, 4)
binary.LittleEndian.PutUint32(buff, uint32(ds.PulseNo))
result = append(result, buff...)
result = append(result, ds.JetID.Bytes()...)
return result
}
// WriteHashData writes DropSize data to provided writer. This data is used to calculate DropSize's hash.
func (ds *DropSize) WriteHashData(w io.Writer) (int, error) {
return w.Write(ds.serializeDropSize())
}
// DropSizeHistory is chain of drop sizes
type DropSizeHistory []DropSize
// DeserializeJetDropSizeHistory deserializes DropSizeHistory
func DeserializeJetDropSizeHistory(ctx context.Context, buff []byte) (DropSizeHistory, error) {
dec := codec.NewDecoder(bytes.NewReader(buff), &codec.CborHandle{})
var dropSizes = DropSizeHistory{}
err := dec.Decode(&dropSizes)
if err != nil {
return nil, errors.Wrapf(err, "[ DeserializeJetDropSizeHistory ] Can't decode DropSizeHistory")
}
return dropSizes, nil
}
// Bytes serializes DropSizeHistory
func (dropSizeHistory DropSizeHistory) Bytes() []byte {
return encode(dropSizeHistory)
}