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rwset_proto_util.go
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rwset_proto_util.go
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/*
Copyright IBM Corp. 2016 All Rights Reserved.
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 rwsetutil
import (
"github.com/golang/protobuf/proto"
"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/version"
"github.com/hyperledger/fabric/core/ledger/util"
"github.com/hyperledger/fabric/protos/ledger/rwset"
"github.com/hyperledger/fabric/protos/ledger/rwset/kvrwset"
)
/////////////////////////////////////////////////////////////////
// Messages related to PUBLIC read-write set
/////////////////////////////////////////////////////////////////
// TxRwSet acts as a proxy of 'rwset.TxReadWriteSet' proto message and helps constructing Read-write set specifically for KV data model
type TxRwSet struct {
NsRwSets []*NsRwSet
}
// NsRwSet encapsulates 'kvrwset.KVRWSet' proto message for a specific name space (chaincode)
type NsRwSet struct {
NameSpace string
KvRwSet *kvrwset.KVRWSet
CollHashedRwSets []*CollHashedRwSet
}
// CollHashedRwSet encapsulates 'kvrwset.HashedRWSet' proto message for a specific collection
type CollHashedRwSet struct {
CollectionName string
HashedRwSet *kvrwset.HashedRWSet
PvtRwSetHash []byte
}
// GetPvtDataHash returns the PvtRwSetHash for a given namespace and collection
func (txRwSet *TxRwSet) GetPvtDataHash(ns, coll string) []byte {
// we could build and use a map to reduce the number of lookup
// in the future call. However, we decided to defer such optimization
// due to the following assumptions (mainly to avoid additioan LOC).
// we assume that the number of namespaces and collections in a txRWSet
// to be very minimal (in a single digit),
for _, nsRwSet := range txRwSet.NsRwSets {
if nsRwSet.NameSpace != ns {
continue
}
return nsRwSet.getPvtDataHash(coll)
}
return nil
}
func (nsRwSet *NsRwSet) getPvtDataHash(coll string) []byte {
for _, collHashedRwSet := range nsRwSet.CollHashedRwSets {
if collHashedRwSet.CollectionName != coll {
continue
}
return collHashedRwSet.PvtRwSetHash
}
return nil
}
/////////////////////////////////////////////////////////////////
// Messages related to PRIVATE read-write set
/////////////////////////////////////////////////////////////////
// TxPvtRwSet represents 'rwset.TxPvtReadWriteSet' proto message
type TxPvtRwSet struct {
NsPvtRwSet []*NsPvtRwSet
}
// NsPvtRwSet represents 'rwset.NsPvtReadWriteSet' proto message
type NsPvtRwSet struct {
NameSpace string
CollPvtRwSets []*CollPvtRwSet
}
// CollPvtRwSet encapsulates 'kvrwset.KVRWSet' proto message for a private rwset for a specific collection
// KvRwSet in a private RwSet should not contain range query info
type CollPvtRwSet struct {
CollectionName string
KvRwSet *kvrwset.KVRWSet
}
/////////////////////////////////////////////////////////////////
// FUNCTIONS for converting messages to/from proto bytes
/////////////////////////////////////////////////////////////////
// ToProtoBytes constructs TxReadWriteSet proto message and serializes using protobuf Marshal
func (txRwSet *TxRwSet) ToProtoBytes() ([]byte, error) {
var protoMsg *rwset.TxReadWriteSet
var err error
if protoMsg, err = txRwSet.toProtoMsg(); err != nil {
return nil, err
}
return proto.Marshal(protoMsg)
}
// FromProtoBytes deserializes protobytes into TxReadWriteSet proto message and populates 'TxRwSet'
func (txRwSet *TxRwSet) FromProtoBytes(protoBytes []byte) error {
protoMsg := &rwset.TxReadWriteSet{}
var err error
var txRwSetTemp *TxRwSet
if err = proto.Unmarshal(protoBytes, protoMsg); err != nil {
return err
}
if txRwSetTemp, err = TxRwSetFromProtoMsg(protoMsg); err != nil {
return err
}
txRwSet.NsRwSets = txRwSetTemp.NsRwSets
return nil
}
// ToProtoBytes constructs 'TxPvtReadWriteSet' proto message and serializes using protobuf Marshal
func (txPvtRwSet *TxPvtRwSet) ToProtoBytes() ([]byte, error) {
var protoMsg *rwset.TxPvtReadWriteSet
var err error
if protoMsg, err = txPvtRwSet.toProtoMsg(); err != nil {
return nil, err
}
return proto.Marshal(protoMsg)
}
// FromProtoBytes deserializes protobytes into 'TxPvtReadWriteSet' proto message and populates 'TxPvtRwSet'
func (txPvtRwSet *TxPvtRwSet) FromProtoBytes(protoBytes []byte) error {
protoMsg := &rwset.TxPvtReadWriteSet{}
var err error
var txPvtRwSetTemp *TxPvtRwSet
if err = proto.Unmarshal(protoBytes, protoMsg); err != nil {
return err
}
if txPvtRwSetTemp, err = TxPvtRwSetFromProtoMsg(protoMsg); err != nil {
return err
}
txPvtRwSet.NsPvtRwSet = txPvtRwSetTemp.NsPvtRwSet
return nil
}
func (txRwSet *TxRwSet) toProtoMsg() (*rwset.TxReadWriteSet, error) {
protoMsg := &rwset.TxReadWriteSet{DataModel: rwset.TxReadWriteSet_KV}
var nsRwSetProtoMsg *rwset.NsReadWriteSet
var err error
for _, nsRwSet := range txRwSet.NsRwSets {
if nsRwSetProtoMsg, err = nsRwSet.toProtoMsg(); err != nil {
return nil, err
}
protoMsg.NsRwset = append(protoMsg.NsRwset, nsRwSetProtoMsg)
}
return protoMsg, nil
}
func TxRwSetFromProtoMsg(protoMsg *rwset.TxReadWriteSet) (*TxRwSet, error) {
txRwSet := &TxRwSet{}
var nsRwSet *NsRwSet
var err error
for _, nsRwSetProtoMsg := range protoMsg.NsRwset {
if nsRwSet, err = nsRwSetFromProtoMsg(nsRwSetProtoMsg); err != nil {
return nil, err
}
txRwSet.NsRwSets = append(txRwSet.NsRwSets, nsRwSet)
}
return txRwSet, nil
}
func (nsRwSet *NsRwSet) toProtoMsg() (*rwset.NsReadWriteSet, error) {
var err error
protoMsg := &rwset.NsReadWriteSet{Namespace: nsRwSet.NameSpace}
if protoMsg.Rwset, err = proto.Marshal(nsRwSet.KvRwSet); err != nil {
return nil, err
}
var collHashedRwSetProtoMsg *rwset.CollectionHashedReadWriteSet
for _, collHashedRwSet := range nsRwSet.CollHashedRwSets {
if collHashedRwSetProtoMsg, err = collHashedRwSet.toProtoMsg(); err != nil {
return nil, err
}
protoMsg.CollectionHashedRwset = append(protoMsg.CollectionHashedRwset, collHashedRwSetProtoMsg)
}
return protoMsg, nil
}
func nsRwSetFromProtoMsg(protoMsg *rwset.NsReadWriteSet) (*NsRwSet, error) {
nsRwSet := &NsRwSet{NameSpace: protoMsg.Namespace, KvRwSet: &kvrwset.KVRWSet{}}
if err := proto.Unmarshal(protoMsg.Rwset, nsRwSet.KvRwSet); err != nil {
return nil, err
}
var err error
var collHashedRwSet *CollHashedRwSet
for _, collHashedRwSetProtoMsg := range protoMsg.CollectionHashedRwset {
if collHashedRwSet, err = collHashedRwSetFromProtoMsg(collHashedRwSetProtoMsg); err != nil {
return nil, err
}
nsRwSet.CollHashedRwSets = append(nsRwSet.CollHashedRwSets, collHashedRwSet)
}
return nsRwSet, nil
}
func (collHashedRwSet *CollHashedRwSet) toProtoMsg() (*rwset.CollectionHashedReadWriteSet, error) {
var err error
protoMsg := &rwset.CollectionHashedReadWriteSet{
CollectionName: collHashedRwSet.CollectionName,
PvtRwsetHash: collHashedRwSet.PvtRwSetHash,
}
if protoMsg.HashedRwset, err = proto.Marshal(collHashedRwSet.HashedRwSet); err != nil {
return nil, err
}
return protoMsg, nil
}
func collHashedRwSetFromProtoMsg(protoMsg *rwset.CollectionHashedReadWriteSet) (*CollHashedRwSet, error) {
colHashedRwSet := &CollHashedRwSet{
CollectionName: protoMsg.CollectionName,
PvtRwSetHash: protoMsg.PvtRwsetHash,
HashedRwSet: &kvrwset.HashedRWSet{},
}
if err := proto.Unmarshal(protoMsg.HashedRwset, colHashedRwSet.HashedRwSet); err != nil {
return nil, err
}
return colHashedRwSet, nil
}
func (txRwSet *TxRwSet) NumCollections() int {
if txRwSet == nil {
return 0
}
numColls := 0
for _, nsRwset := range txRwSet.NsRwSets {
for range nsRwset.CollHashedRwSets {
numColls++
}
}
return numColls
}
///////////////////////////////////////////////////////////////////////////////
// functions for private read-write set
///////////////////////////////////////////////////////////////////////////////
func (txPvtRwSet *TxPvtRwSet) toProtoMsg() (*rwset.TxPvtReadWriteSet, error) {
protoMsg := &rwset.TxPvtReadWriteSet{DataModel: rwset.TxReadWriteSet_KV}
var nsProtoMsg *rwset.NsPvtReadWriteSet
var err error
for _, nsPvtRwSet := range txPvtRwSet.NsPvtRwSet {
if nsProtoMsg, err = nsPvtRwSet.toProtoMsg(); err != nil {
return nil, err
}
protoMsg.NsPvtRwset = append(protoMsg.NsPvtRwset, nsProtoMsg)
}
return protoMsg, nil
}
func TxPvtRwSetFromProtoMsg(protoMsg *rwset.TxPvtReadWriteSet) (*TxPvtRwSet, error) {
txPvtRwset := &TxPvtRwSet{}
var nsPvtRwSet *NsPvtRwSet
var err error
for _, nsRwSetProtoMsg := range protoMsg.NsPvtRwset {
if nsPvtRwSet, err = nsPvtRwSetFromProtoMsg(nsRwSetProtoMsg); err != nil {
return nil, err
}
txPvtRwset.NsPvtRwSet = append(txPvtRwset.NsPvtRwSet, nsPvtRwSet)
}
return txPvtRwset, nil
}
func (nsPvtRwSet *NsPvtRwSet) toProtoMsg() (*rwset.NsPvtReadWriteSet, error) {
protoMsg := &rwset.NsPvtReadWriteSet{Namespace: nsPvtRwSet.NameSpace}
var err error
var collPvtRwSetProtoMsg *rwset.CollectionPvtReadWriteSet
for _, collPvtRwSet := range nsPvtRwSet.CollPvtRwSets {
if collPvtRwSetProtoMsg, err = collPvtRwSet.toProtoMsg(); err != nil {
return nil, err
}
protoMsg.CollectionPvtRwset = append(protoMsg.CollectionPvtRwset, collPvtRwSetProtoMsg)
}
return protoMsg, err
}
func nsPvtRwSetFromProtoMsg(protoMsg *rwset.NsPvtReadWriteSet) (*NsPvtRwSet, error) {
nsPvtRwSet := &NsPvtRwSet{NameSpace: protoMsg.Namespace}
for _, collPvtRwSetProtoMsg := range protoMsg.CollectionPvtRwset {
var err error
var collPvtRwSet *CollPvtRwSet
if collPvtRwSet, err = collPvtRwSetFromProtoMsg(collPvtRwSetProtoMsg); err != nil {
return nil, err
}
nsPvtRwSet.CollPvtRwSets = append(nsPvtRwSet.CollPvtRwSets, collPvtRwSet)
}
return nsPvtRwSet, nil
}
func (collPvtRwSet *CollPvtRwSet) toProtoMsg() (*rwset.CollectionPvtReadWriteSet, error) {
var err error
protoMsg := &rwset.CollectionPvtReadWriteSet{CollectionName: collPvtRwSet.CollectionName}
if protoMsg.Rwset, err = proto.Marshal(collPvtRwSet.KvRwSet); err != nil {
return nil, err
}
return protoMsg, nil
}
func collPvtRwSetFromProtoMsg(protoMsg *rwset.CollectionPvtReadWriteSet) (*CollPvtRwSet, error) {
collPvtRwSet := &CollPvtRwSet{CollectionName: protoMsg.CollectionName, KvRwSet: &kvrwset.KVRWSet{}}
if err := proto.Unmarshal(protoMsg.Rwset, collPvtRwSet.KvRwSet); err != nil {
return nil, err
}
return collPvtRwSet, nil
}
// NewKVRead helps constructing proto message kvrwset.KVRead
func NewKVRead(key string, version *version.Height) *kvrwset.KVRead {
return &kvrwset.KVRead{Key: key, Version: newProtoVersion(version)}
}
// NewVersion helps converting proto message kvrwset.Version to version.Height
func NewVersion(protoVersion *kvrwset.Version) *version.Height {
if protoVersion == nil {
return nil
}
return version.NewHeight(protoVersion.BlockNum, protoVersion.TxNum)
}
func newProtoVersion(height *version.Height) *kvrwset.Version {
if height == nil {
return nil
}
return &kvrwset.Version{BlockNum: height.BlockNum, TxNum: height.TxNum}
}
func newKVWrite(key string, value []byte) *kvrwset.KVWrite {
return &kvrwset.KVWrite{Key: key, IsDelete: value == nil, Value: value}
}
func newPvtKVReadHash(key string, version *version.Height) *kvrwset.KVReadHash {
return &kvrwset.KVReadHash{KeyHash: util.ComputeStringHash(key), Version: newProtoVersion(version)}
}
func newPvtKVWriteAndHash(key string, value []byte) (*kvrwset.KVWrite, *kvrwset.KVWriteHash) {
kvWrite := newKVWrite(key, value)
var keyHash, valueHash []byte
keyHash = util.ComputeStringHash(key)
if !kvWrite.IsDelete {
valueHash = util.ComputeHash(value)
}
return kvWrite, &kvrwset.KVWriteHash{KeyHash: keyHash, IsDelete: kvWrite.IsDelete, ValueHash: valueHash}
}