Golang chaincode.Execute函數代碼示例

// Invoke or query a chaincode.
func invoke(ctx context.Context, spec *pb.ChaincodeSpec, typ pb.Transaction_Type) (*pb.ChaincodeEvent, string, []byte, error) {
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	// Now create the Transactions message and send to Peer.
	uuid := util.GenerateUUID()

	var transaction *pb.Transaction
	var err error
	transaction, err = pb.NewChaincodeExecute(chaincodeInvocationSpec, uuid, typ)
	if err != nil {
		return nil, uuid, nil, fmt.Errorf("Error invoking chaincode: %s ", err)
	}

	var retval []byte
	var execErr error
	var ccevt *pb.ChaincodeEvent
	if typ == pb.Transaction_CHAINCODE_QUERY {
		retval, ccevt, execErr = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	} else {
		ledger, _ := ledger.GetLedger()
		ledger.BeginTxBatch("1")
		retval, ccevt, execErr = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
		if err != nil {
			return nil, uuid, nil, fmt.Errorf("Error invoking chaincode: %s ", err)
		}
		ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)
	}

	return ccevt, uuid, retval, execErr
}

func deploy(admCert crypto.CertificateHandler) error {
	// Prepare the spec. The metadata includes the identity of the administrator
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              &pb.ChaincodeInput{Args: util.ToChaincodeArgs("init")},
		Metadata:             admCert.GetCertificate(),
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	// First build and get the deployment spec
	var ctx = context.Background()
	chaincodeDeploymentSpec, err := getDeploymentSpec(ctx, spec)
	if err != nil {
		return err
	}

	tid := chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := administrator.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err
}

func transferOwnership(owner crypto.Client, ownerCert crypto.CertificateHandler, asset string, newOwnerCert crypto.CertificateHandler) error {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := owner.GetTCertificateHandlerNext()
	if err != nil {
		return err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return err
	}
	binding, err := txHandler.GetBinding()
	if err != nil {
		return err
	}

	chaincodeInput := &pb.ChaincodeInput{Function: "transfer", Args: []string{asset, string(newOwnerCert.GetCertificate())}}
	chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
	if err != nil {
		return err
	}

	// Access control. Owner signs chaincodeInputRaw || binding to confirm his identity
	sigma, err := ownerCert.Sign(append(chaincodeInputRaw, binding...))
	if err != nil {
		return err
	}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		Metadata:             sigma, // Proof of identity
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err

}

func whoIsTheOwner(asset string) ([]byte, error) {
	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs("query", asset)}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := administrator.NewChaincodeQuery(chaincodeInvocationSpec, tid)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	result, _, err := chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return result, err
}

func (handler *ConsensusHandler) doChainQuery(tx *pb.Transaction) error {
	var response *pb.Response
	var err error
	// Verify transaction signature if security is enabled
	secHelper := handler.coordinator.GetSecHelper()
	if nil != secHelper {
		if logger.IsEnabledFor(logging.DEBUG) {
			logger.Debug("Verifying transaction signature %s", tx.Uuid)
		}
		if tx, err = secHelper.TransactionPreValidation(tx); nil != err {
			response = &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}
			logger.Debug("Failed to verify transaction %v", err)
		}

	}
	// execute if response nil (ie, no error)
	if nil == response {
		// The secHelper is set during creat ChaincodeSupport, so we don't need this step
		// cxt := context.WithValue(context.Background(), "security", secHelper)
		cxt := context.Background()
		result, err := chaincode.Execute(cxt, chaincode.GetChain(chaincode.DefaultChain), tx)
		if err != nil {
			response = &pb.Response{Status: pb.Response_FAILURE,
				Msg: []byte(fmt.Sprintf("Error:%s", err))}
		} else {
			response = &pb.Response{Status: pb.Response_SUCCESS, Msg: result}
		}
	}
	payload, _ := proto.Marshal(response)
	handler.SendMessage(&pb.Message{Type: pb.Message_RESPONSE, Payload: payload})
	return nil
}

func transferOwnership(owner crypto.Client, ownerCert crypto.CertificateHandler, fromAttributes string,
	newOwnerCert crypto.CertificateHandler, toAttributes string, amount string) error {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := owner.GetTCertificateHandlerNext("role")
	if err != nil {
		return err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return err
	}

	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs(
		"transferOwnership",
		base64.StdEncoding.EncodeToString(ownerCert.GetCertificate()),
		fromAttributes,
		base64.StdEncoding.EncodeToString(newOwnerCert.GetCertificate()),
		toAttributes,
		amount)}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err

}

// ProcessTransactionMsg processes a Message in context of a Transaction
func (eng *EngineImpl) ProcessTransactionMsg(msg *pb.Message, tx *pb.Transaction) (response *pb.Response) {
	//TODO: Do we always verify security, or can we supply a flag on the invoke ot this functions so to bypass check for locally generated transactions?
	if tx.Type == pb.Transaction_CHAINCODE_QUERY {
		if !engine.helper.valid {
			logger.Warning("Rejecting query because state is currently not valid")
			return &pb.Response{Status: pb.Response_FAILURE,
				Msg: []byte("Error: state may be inconsistent, cannot query")}
		}

		// The secHelper is set during creat ChaincodeSupport, so we don't need this step
		// cxt := context.WithValue(context.Background(), "security", secHelper)
		cxt := context.Background()
		//query will ignore events as these are not stored on ledger (and query can report
		//"event" data synchronously anyway)
		result, _, err := chaincode.Execute(cxt, chaincode.GetChain(chaincode.DefaultChain), tx)
		if err != nil {
			response = &pb.Response{Status: pb.Response_FAILURE,
				Msg: []byte(fmt.Sprintf("Error:%s", err))}
		} else {
			response = &pb.Response{Status: pb.Response_SUCCESS, Msg: result}
		}
	} else {
		// Chaincode Transaction
		response = &pb.Response{Status: pb.Response_SUCCESS, Msg: []byte(tx.Uuid)}

		//TODO: Do we need to verify security, or can we supply a flag on the invoke ot this functions
		// If we fail to marshal or verify the tx, don't send it to consensus plugin
		if response.Status == pb.Response_FAILURE {
			return response
		}

		// Pass the message to the consenter (eg. PBFT) NOTE: Make sure engine has been initialized
		if eng.consenter == nil {
			return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte("Engine not initialized")}
		}
		// TODO, do we want to put these requests into a queue? This will block until
		// the consenter gets around to handling the message, but it also provides some
		// natural feedback to the REST API to determine how long it takes to queue messages
		err := eng.consenter.RecvMsg(msg, eng.peerEndpoint.ID)
		if err != nil {
			response = &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}
		}
	}
	return response
}

// deployLocal deploys the supplied chaincode image to the local peer
func deploySysCC(ctx context.Context, spec *protos.ChaincodeSpec) error {
	// First build and get the deployment spec
	chaincodeDeploymentSpec, err := buildSysCC(ctx, spec)

	if err != nil {
		sysccLogger.Error(fmt.Sprintf("Error deploying chaincode spec: %v\n\n error: %s", spec, err))
		return err
	}

	transaction, err := protos.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)

	return err
}

// DeployLocal deploys the supplied chaincode image to the local peer
func DeployLocal(ctx context.Context, spec *protos.ChaincodeSpec, gbexists bool) (*protos.Transaction, []byte, error) {
	// First build and get the deployment spec
	chaincodeDeploymentSpec, err := BuildLocal(ctx, spec)

	if err != nil {
		genesisLogger.Error(fmt.Sprintf("Error deploying chaincode spec: %v\n\n error: %s", spec, err))
		return nil, nil, err
	}

	var transaction *protos.Transaction
	if gbexists {
		ledger, err := ledger.GetLedger()
		if err != nil {
			return nil, nil, fmt.Errorf("Failed to get handle to ledger (%s)", err)
		}
		transaction, err = ledger.GetTransactionByUUID(chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
		if err != nil {
			genesisLogger.Warning(fmt.Sprintf("cannot get deployment transaction for %s - %s", chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name, err))
			transaction = nil
		} else {
			genesisLogger.Debug("deployment transaction for %s exists", chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
		}
	}

	if transaction == nil {
		transaction, err = protos.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
		if err != nil {
			return nil, nil, fmt.Errorf("Error deploying chaincode: %s ", err)
		}
	}

	//chaincode.NewChaincodeSupport(chaincode.DefaultChain, peer.GetPeerEndpoint, false, 120000)
	// The secHelper is set during creat ChaincodeSupport, so we don't need this step
	//ctx = context.WithValue(ctx, "security", secCxt)
	result, err := chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	return transaction, result, err
}

func read(invoker crypto.Client, invokerCert crypto.CertificateHandler) ([]byte, error) {
	// Get a transaction handler to be used to submit the query transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := invoker.GetTCertificateHandlerNext()
	if err != nil {
		return nil, err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return nil, err
	}
	binding, err := txHandler.GetBinding()
	if err != nil {
		return nil, err
	}

	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs("read")}
	chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
	if err != nil {
		return nil, err
	}

	// Access control:
	// invokerCert signs invokerCert.GetCertificate() || chaincodeInputRaw || binding to confirm his identity
	sigma, err := invokerCert.Sign(append(invokerCert.GetCertificate(), append(chaincodeInputRaw, binding...)...))
	if err != nil {
		return nil, err
	}

	rbacMetadata := RBACMetadata{invokerCert.GetCertificate(), sigma}
	rbacMetadataRaw, err := asn1.Marshal(rbacMetadata)
	if err != nil {
		return nil, err
	}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		Metadata:             rbacMetadataRaw,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeQuery(chaincodeInvocationSpec, tid)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	result, _, err := chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return result, err
}

func addRole(admCert crypto.CertificateHandler, idCert crypto.CertificateHandler, role string) error {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding
	submittingCertHandler, err := administrator.GetTCertificateHandlerNext()
	if err != nil {
		return err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return err
	}
	binding, err := txHandler.GetBinding()
	if err != nil {
		return err
	}

	chaincodeInput := &pb.ChaincodeInput{Function: "addRole", Args: []string{string(idCert.GetCertificate()), role}}
	chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
	if err != nil {
		return err
	}

	// Access control:
	// admCert signs admCert.GetCertificate() || chaincodeInputRaw || binding to confirm his identity
	sigma, err := admCert.Sign(append(admCert.GetCertificate(), append(chaincodeInputRaw, binding...)...))
	if err != nil {
		return err
	}

	rbacMetadata := RBACMetadata{admCert.GetCertificate(), sigma}
	rbacMetadataRaw, err := asn1.Marshal(rbacMetadata)
	if err != nil {
		return err
	}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		Metadata:             rbacMetadataRaw, // Proof of identity
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err
}