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

}
Example #2
0
func (d *Devops) createExecTx(spec *pb.ChaincodeInvocationSpec, uuid string, invokeTx bool, sec crypto.Client) (*pb.Transaction, error) {
	var tx *pb.Transaction
	var err error
	if nil != sec {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Creating secure invocation transaction %s", uuid)
		}
		if invokeTx {
			tx, err = sec.NewChaincodeExecute(spec, uuid)
		} else {
			tx, err = sec.NewChaincodeQuery(spec, uuid)
		}
		if nil != err {
			return nil, err
		}
	} else {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Creating invocation transaction (%s)", uuid)
		}
		var t pb.Transaction_Type
		if invokeTx {
			t = pb.Transaction_CHAINCODE_EXECUTE
		} else {
			t = pb.Transaction_CHAINCODE_QUERY
		}
		tx, err = pb.NewChaincodeExecute(spec, uuid, t)
		if nil != err {
			return nil, err
		}
	}
	return tx, nil
}
Example #3
0
// Deploy deploys the supplied chaincode image to the validators through a transaction
func (d *Devops) Deploy(ctx context.Context, spec *pb.ChaincodeSpec) (*pb.ChaincodeDeploymentSpec, error) {
	// get the deployment spec
	chaincodeDeploymentSpec, err := d.getChaincodeBytes(ctx, spec)

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

	// Now create the Transactions message and send to Peer.

	transID := chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name

	var tx *pb.Transaction
	var sec crypto.Client

	if viper.GetBool("security.enabled") {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Initializing secure devops using context %s", spec.SecureContext)
		}
		sec, err = crypto.InitClient(spec.SecureContext, nil)
		defer crypto.CloseClient(sec)

		// remove the security context since we are no longer need it down stream
		spec.SecureContext = ""

		if nil != err {
			return nil, err
		}

		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Creating secure transaction %s", transID)
		}
		tx, err = sec.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, transID)
		if nil != err {
			return nil, err
		}
	} else {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Creating deployment transaction (%s)", transID)
		}
		tx, err = pb.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, transID)
		if err != nil {
			return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
		}
	}

	if devopsLogger.IsEnabledFor(logging.DEBUG) {
		devopsLogger.Debug("Sending deploy transaction (%s) to validator", tx.Uuid)
	}
	resp := d.coord.ExecuteTransaction(tx)
	if resp.Status == pb.Response_FAILURE {
		err = fmt.Errorf(string(resp.Msg))
	}

	return chaincodeDeploymentSpec, err
}
Example #4
0
func (d *Devops) invokeOrQuery(ctx context.Context, chaincodeInvocationSpec *pb.ChaincodeInvocationSpec, invoke bool) (*pb.Response, error) {

	if chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name == "" {
		return nil, fmt.Errorf("name not given for invoke/query")
	}

	// Now create the Transactions message and send to Peer.
	uuid, uuidErr := util.GenerateUUID()
	if uuidErr != nil {
		devopsLogger.Error(fmt.Sprintf("Error generating UUID: %s", uuidErr))
		return nil, uuidErr
	}
	var transaction *pb.Transaction
	var err error
	var sec crypto.Client
	if viper.GetBool("security.enabled") {
		if devopsLogger.IsEnabledFor(logging.DEBUG) {
			devopsLogger.Debug("Initializing secure devops using context %s", chaincodeInvocationSpec.ChaincodeSpec.SecureContext)
		}
		sec, err = crypto.InitClient(chaincodeInvocationSpec.ChaincodeSpec.SecureContext, nil)
		defer crypto.CloseClient(sec)
		// remove the security context since we are no longer need it down stream
		chaincodeInvocationSpec.ChaincodeSpec.SecureContext = ""
		if nil != err {
			return nil, err
		}
	}
	transaction, err = d.createExecTx(chaincodeInvocationSpec, uuid, invoke, sec)
	if err != nil {
		return nil, err
	}
	if devopsLogger.IsEnabledFor(logging.DEBUG) {
		devopsLogger.Debug("Sending invocation transaction (%s) to validator", transaction.Uuid)
	}
	resp := d.coord.ExecuteTransaction(transaction)
	if resp.Status == pb.Response_FAILURE {
		err = fmt.Errorf(string(resp.Msg))
	} else {
		if !invoke && nil != sec && viper.GetBool("security.privacy") {
			if resp.Msg, err = sec.DecryptQueryResult(transaction, resp.Msg); nil != err {
				devopsLogger.Debug("Failed decrypting query transaction result %s", string(resp.Msg[:]))
				//resp = &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}
			}
		}
	}
	return resp, err
}