github.com/braveheart12/insolar-09-08-19@v0.8.7/ledger/storage/record/serialize.go (about)

     1  /*
     2   *    Copyright 2019 Insolar Technologies
     3   *
     4   *    Licensed under the Apache License, Version 2.0 (the "License");
     5   *    you may not use this file except in compliance with the License.
     6   *    You may obtain a copy of the License at
     7   *
     8   *        http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   *    Unless required by applicable law or agreed to in writing, software
    11   *    distributed under the License is distributed on an "AS IS" BASIS,
    12   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   *    See the License for the specific language governing permissions and
    14   *    limitations under the License.
    15   */
    16  
    17  package record
    18  
    19  import (
    20  	"bytes"
    21  	"encoding/binary"
    22  
    23  	"github.com/insolar/insolar/core"
    24  	"github.com/ugorji/go/codec"
    25  )
    26  
    27  // SerializeType returns binary representation of provided type.
    28  func SerializeType(id TypeID) []byte {
    29  	buf := make([]byte, TypeIDSize)
    30  	binary.BigEndian.PutUint32(buf, uint32(id))
    31  	return buf
    32  }
    33  
    34  // DeserializeType returns type from provided binary representation.
    35  func DeserializeType(buf []byte) TypeID {
    36  	return TypeID(binary.BigEndian.Uint32(buf))
    37  }
    38  
    39  // SerializeRecord returns binary representation of provided record.
    40  func SerializeRecord(rec Record) []byte {
    41  	typeBytes := SerializeType(TypeFromRecord(rec))
    42  	buff := bytes.NewBuffer(typeBytes)
    43  	enc := codec.NewEncoder(buff, &codec.CborHandle{})
    44  	enc.MustEncode(rec)
    45  	return buff.Bytes()
    46  }
    47  
    48  // DeserializeRecord returns record decoded from bytes.
    49  func DeserializeRecord(buf []byte) Record {
    50  	t := DeserializeType(buf[:TypeIDSize])
    51  	dec := codec.NewDecoderBytes(buf[TypeIDSize:], &codec.CborHandle{})
    52  	rec := RecordFromType(t)
    53  	dec.MustDecode(&rec)
    54  	return rec
    55  }
    56  
    57  // CalculateIDForBlob calculate id for blob with using current pulse number
    58  func CalculateIDForBlob(scheme core.PlatformCryptographyScheme, pulseNumber core.PulseNumber, blob []byte) *core.RecordID {
    59  	hasher := scheme.IntegrityHasher()
    60  	_, err := hasher.Write(blob)
    61  	if err != nil {
    62  		panic(err)
    63  	}
    64  	return core.NewRecordID(pulseNumber, hasher.Sum(nil))
    65  }