change to only getState Once

Signed-off-by: chenchanglew <lewchenchang@gmail.com>

Author: chenchanglew

ecc_go/chaincode/enclave_go/skvs_stub_Interface.go

@@ -12,97 +12,86 @@ import (
 
 	"github.com/hyperledger/fabric-chaincode-go/shim"
 	pb "github.com/hyperledger/fabric-protos-go/peer"
+	"github.com/pkg/errors"
 )
 
-var SingleKey = "SingleKey"
-
 type SkvsStubInterface struct {
 	*FpcStubInterface
+	allDataOld map[string]string
+	allDataNew map[string]string
+	key        string
 }
 
 func NewSkvsStubInterface(stub shim.ChaincodeStubInterface, input *pb.ChaincodeInput, rwset *readWriteSet, sep StateEncryptionFunctions) *SkvsStubInterface {
+	logger.Warning("==== Get New Skvs Interface =====")
 	fpcStub := NewFpcStubInterface(stub, input, rwset, sep)
-	return &SkvsStubInterface{fpcStub}
-}
-
-func (s *SkvsStubInterface) GetState(key string) ([]byte, error) {
-	logger.Warningf("Calling Get State (Start), key = %s", key)
-	encValue, err := s.GetPublicState(SingleKey)
+	skvsStub := SkvsStubInterface{fpcStub, map[string]string{}, map[string]string{}, "SKVS"}
+	err := skvsStub.InitSKVS()
 	if err != nil {
-		return nil, err
+		logger.Warningf("Error!! Initializing SKVS failed")
 	}
-
-	// in case the key does not exist, return early
-	if len(encValue) == 0 {
-		logger.Warningf("Calling Get State (End), data empty return.")
-		return nil, nil
-	}
-
-	value, err := s.sep.DecryptState(encValue)
-	if err != nil {
-		return nil, err
-	}
-
-	// Create an interface{} value to hold the unmarshalled data
-	var allData map[string]string
-
-	// Unmarshal the JSON data into the interface{} value
-	err = json.Unmarshal(value, &allData)
-	if err != nil {
-		logger.Errorf("SKVS Json unmarshal error: %s", err)
-		return nil, err
-	}
-	logger.Warningf("Calling Get State (Mid), key = %s, decrypted done alldata = %s", key, allData)
-
-	targetHex := allData[key]
-	targetBytes, err := hex.DecodeString(targetHex)
-	logger.Warningf("Calling Get State (End), Target: %s, TargetBytes: %x, err: %s", targetHex, targetBytes, err)
-	return targetBytes, err
-	// return s.sep.DecryptState(encValue)
+	return &skvsStub
 }
 
-func (s *SkvsStubInterface) PutState(key string, value []byte) error {
-	logger.Warningf("Calling Put State (Start), key = %s, value = %x", key, value)
-	// grab all data from the state.
-	encAllValue, err := s.GetPublicState(SingleKey)
+func (s *SkvsStubInterface) InitSKVS() error {
+	logger.Warningf(" === Initializing SKVS === ")
+
+	// get current state, this will only operate once
+	encValue, err := s.GetPublicState(s.key)
 	if err != nil {
-		return err
+		return nil
 	}
-	var allData map[string]string
 
-	if len(encAllValue) == 0 {
-		// current world state is empty
-		allData = map[string]string{}
+	if len(encValue) == 0 {
+		logger.Warningf("SKVS is empty, Initiating.")
 	} else {
-		allValue, err := s.sep.DecryptState(encAllValue)
+		value, err := s.sep.DecryptState(encValue)
 		if err != nil {
 			return err
 		}
-		// Unmarshal the JSON data into the interface{} value
-		err = json.Unmarshal(allValue, &allData)
+		logger.Warningf("SKVS has default value, loading current value.")
+
+		err = json.Unmarshal(value, &s.allDataOld)
+		err = json.Unmarshal(value, &s.allDataNew)
 		if err != nil {
 			logger.Errorf("SKVS Json unmarshal error: %s", err)
 			return err
 		}
 	}
-	logger.Warningf("Calling Put State (Mid-1), decrypt succeed, allData = %s", allData)
 
-	valueHex := hex.EncodeToString(value)
+	logger.Warningf("SKVS Init finish, allDataOld = %s, allDataNew = %s", s.allDataOld, s.allDataNew)
+	return nil
+}
+
+func (s *SkvsStubInterface) GetState(key string) ([]byte, error) {
+	logger.Warningf("Calling Get State (Start), key = %s, alldataOld = %s", key, s.allDataOld)
+	targetHex, found := s.allDataOld[key]
+	if found != true {
+		return nil, errors.New("skvs allDataOld key not found")
+	}
+	targetBytes, err := hex.DecodeString(targetHex)
+	logger.Warningf("Calling Get State (End), TargetHex: %s, TargetBytes: %x, err: %s", targetHex, targetBytes, err)
+	return targetBytes, err
+}
+
+func (s *SkvsStubInterface) PutState(key string, value []byte) error {
+	logger.Warningf("Calling Put State (Start), key = %s, value = %x, alldata = %s", key, value, s.allDataNew)
 
-	allData[key] = valueHex
-	logger.Warningf("Calling Put State (Mid-2), add need data key = %s, valueHex = %s, allData = %s", key, valueHex, allData)
+	valueHex := hex.EncodeToString(value)
+	s.allDataNew[key] = valueHex
+	logger.Warningf("Calling Put State (Mid-1), add need data key = %s, valueHex = %s, allData = %s", key, valueHex, s.allDataNew)
 
-	byteAllData, err := json.Marshal(allData)
+	byteAllData, err := json.Marshal(s.allDataNew)
 	if err != nil {
 		return err
 	}
-	logger.Warningf("Calling Put State (Mid-3), successfull marshal allData, byteAlldata = %x", byteAllData)
+	logger.Warningf("Calling Put State (Mid-2), successfull marshal allData, byteAlldata = %x", byteAllData)
 
 	encValue, err := s.sep.EncryptState(byteAllData)
 	if err != nil {
 		return err
 	}
 	logger.Warningf("Calling Put State (End), put encValue %x", encValue)
 
-	return s.PutPublicState(SingleKey, encValue)
+	return s.PutPublicState(s.key, encValue)
 }