github.com/braveheart12/insolar-09-08-19@v0.8.7/ledger/storage/utils.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 storage
    18  
    19  import (
    20  	"bytes"
    21  	"encoding/hex"
    22  
    23  	"github.com/insolar/insolar/core"
    24  )
    25  
    26  type bytes2hex []byte
    27  
    28  func (h bytes2hex) String() string {
    29  	return hex.EncodeToString(h)
    30  }
    31  
    32  func prefixkey(prefix byte, parts ...[]byte) []byte {
    33  	tail := bytes.Join(parts, nil)
    34  	k := make([]byte, len(tail)+1)
    35  	k[0] = prefix
    36  	_ = copy(k[1:], tail)
    37  	return k
    38  }
    39  
    40  func pulseFromKey(key []byte) core.PulseNumber {
    41  	return core.NewPulseNumber(pulseBytesFromKey(key))
    42  }
    43  
    44  func pulseBytesFromKey(key []byte) []byte {
    45  	return key[core.RecordHashSize : core.RecordHashSize+core.PulseNumberSize]
    46  }