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tsInterface.go
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tsInterface.go
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/*
* Copyright 2020 The SealABC Authors
*
* 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 tsInterface
import (
"encoding/json"
"github.com/SealSC/SealABC/common/utility/serializer/structSerializer"
"github.com/SealSC/SealABC/dataStructure/merkleTree"
"github.com/SealSC/SealABC/metadata/applicationResult"
"github.com/SealSC/SealABC/metadata/block"
"github.com/SealSC/SealABC/metadata/blockchainRequest"
"github.com/SealSC/SealABC/metadata/seal"
"github.com/SealSC/SealABC/service"
"github.com/SealSC/SealABC/service/application/traceableStorage/tsData"
"github.com/SealSC/SealABC/service/application/traceableStorage/tsLedger"
"github.com/SealSC/SealABC/service/system/blockchain/chainStructure"
"github.com/SealSC/SealABC/storage/db/dbInterface/kvDatabase"
"github.com/SealSC/SealABC/storage/db/dbInterface/simpleSQLDatabase"
"sync"
)
type TraceableStorageApplication struct {
chainStructure.BlankApplication
reqList []string
reqMap map[string] blockchainRequest.Entity
poolLimit int
poolLock sync.RWMutex
tsLedger *tsLedger.TSLedger
}
type RequestList struct {
Requests []blockchainRequest.Entity
}
func (t *TraceableStorageApplication) Name() (name string) {
return tsData.APPName
}
func (t *TraceableStorageApplication) PushClientRequest(req blockchainRequest.Entity) (result interface{}, err error) {
reqKey := string(req.Seal.Hash)
if _, exists := t.reqMap[reqKey]; exists {
return
}
tsReq := tsData.TSServiceRequest{}
err = json.Unmarshal(req.Data, &tsReq)
if err != nil {
return
}
err = t.tsLedger.VerifyRequest(tsReq)
if err == nil {
t.poolLock.RLock()
t.reqMap[reqKey] = req
t.reqList = append(t.reqList, reqKey)
t.poolLock.RUnlock()
}
return
}
func (t *TraceableStorageApplication) Query(reqData []byte) (result interface{}, err error) {
return t.tsLedger.GetLocalData(string(reqData))
}
func (t *TraceableStorageApplication) PreExecute(req blockchainRequest.Entity, _ block.Entity) (result []byte, err error) {
var reqList = RequestList{}
err = structSerializer.FromMFBytes(req.Data, &reqList)
if err != nil {
return
}
for _, req := range reqList.Requests {
_, err = t.PushClientRequest(req)
if err != nil {
break
}
}
return
}
func (t *TraceableStorageApplication) removeTransactionsFromPool(list RequestList) {
removedReq := map[string] bool {}
for _, req := range list.Requests {
reqKey := string(req.Seal.Hash)
if _, exists := t.reqMap[reqKey]; exists {
removedReq[reqKey] = true
delete(t.reqMap, reqKey)
}
}
var newTxPoolRecord []string
for _, reqHash := range t.reqList {
if !removedReq[reqHash] {
newTxPoolRecord = append(newTxPoolRecord, reqHash)
}
}
t.reqList = newTxPoolRecord
}
func (t *TraceableStorageApplication) Execute (
req blockchainRequest.Entity,
blk block.Entity,
actIndex uint32,
) (result applicationResult.Entity, err error) {
var reqList = RequestList{}
err = structSerializer.FromMFBytes(req.Data, &reqList)
if err != nil {
return
}
for _, req := range reqList.Requests {
_, err = t.PushClientRequest(req)
if err != nil {
break
}
tsReq := tsData.TSServiceRequest{}
err = json.Unmarshal(req.Data, &tsReq)
if err != nil {
break
}
_, err = t.tsLedger.ExecuteRequest(tsReq)
if err != nil {
break
}
}
if err == nil {
t.removeTransactionsFromPool(reqList)
}
return
}
func (t *TraceableStorageApplication) Information() (info service.BasicInformation) {
info.Name = t.Name()
info.Description = "this is an traceableStorage application"
info.Api.Protocol = service.ApiProtocols.INTERNAL.String()
info.Api.Address = ""
info.Api.ApiList = []service.ApiInterface {}
return
}
func (t *TraceableStorageApplication) RequestsForBlock(_ block.Entity) (reqList []blockchainRequest.Entity, cnt uint32) {
t.poolLock.Lock()
defer t.poolLock.Unlock()
cnt = uint32(len(t.reqList))
if cnt == 0 {
return
}
tsReqList := RequestList{}
mt := merkleTree.Tree{}
for idx, reqKey := range t.reqList {
req := t.reqMap[reqKey]
mt.AddHash(req.Seal.Hash)
tsReqList.Requests = append(tsReqList.Requests, req)
if idx >= (t.poolLimit - 1) {
cnt = uint32(idx)
break
}
}
txRoot, _ := mt.Calculate()
blkReqData, _ := structSerializer.ToMFBytes(tsReqList)
packedReq := blockchainRequest.Entity{
EntityData: blockchainRequest.EntityData{
RequestApplication: t.Name(),
RequestAction: "",
Data: blkReqData,
QueryString: "",
},
Packed: true,
PackedCount: cnt,
Seal: seal.Entity{
Hash: txRoot, //use merkle tree root as seal hash for packed actions
Signature: nil,
SignerPublicKey: nil,
SignerAlgorithm: "",
},
}
return []blockchainRequest.Entity{packedReq}, 1
}
func Load() {
tsLedger.Load()
}
func NewApplicationInterface(kvDriver kvDatabase.IDriver, sqlDriver simpleSQLDatabase.IDriver) (app chainStructure.IBlockchainExternalApplication) {
ts := TraceableStorageApplication{
reqList: []string {},
reqMap: map[string]blockchainRequest.Entity{},
poolLock: sync.RWMutex{},
poolLimit: 1000,
tsLedger: tsLedger.NewTraceableStorage(kvDriver, sqlDriver),
}
app = &ts
return
}