github.com/braveheart12/insolar-09-08-19@v0.8.7/ledger/storage/record/meta.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 "io" 21 22 "github.com/insolar/insolar/core" 23 ) 24 25 // GenesisRecord is the first record created on storage. It's used to link root objects to it. 26 type GenesisRecord struct { 27 } 28 29 // PrevStateID returns previous state id. 30 func (r *GenesisRecord) PrevStateID() *core.RecordID { 31 return nil 32 } 33 34 // State returns state id. 35 func (r *GenesisRecord) State() State { 36 return StateActivation 37 } 38 39 // WriteHashData writes record data to provided writer. This data is used to calculate record's hash. 40 func (r *GenesisRecord) WriteHashData(w io.Writer) (int, error) { 41 return w.Write(SerializeRecord(r)) 42 } 43 44 // GetMemory returns state memory. 45 func (*GenesisRecord) GetMemory() *core.RecordID { 46 return nil 47 } 48 49 // GetImage returns state code. 50 func (*GenesisRecord) GetImage() *core.RecordRef { 51 return nil 52 } 53 54 // GetIsPrototype returns state code. 55 func (*GenesisRecord) GetIsPrototype() bool { 56 return false 57 } 58 59 // ChildRecord is a child activation record. Its used for children iterating. 60 type ChildRecord struct { 61 PrevChild *core.RecordID 62 63 Ref core.RecordRef // Reference to the child's head. 64 } 65 66 // WriteHashData writes record data to provided writer. This data is used to calculate record's hash. 67 func (r *ChildRecord) WriteHashData(w io.Writer) (int, error) { 68 return w.Write(SerializeRecord(r)) 69 } 70 71 // JetRecord represents Jet. 72 type JetRecord struct { 73 // TODO: should contain prefix. 74 } 75 76 // WriteHashData writes record data to provided writer. This data is used to calculate record's hash. 77 func (r *JetRecord) WriteHashData(w io.Writer) (int, error) { 78 return w.Write(SerializeRecord(r)) 79 }