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 }