diff --git a/cmd/genesis/genesis.go b/cmd/genesis/genesis.go
index e789b5c9d..59211b3c7 100644
--- a/cmd/genesis/genesis.go
+++ b/cmd/genesis/genesis.go
@@ -14,6 +14,7 @@ import (
 
 	"github.com/mr-tron/base58"
 	"github.com/pkg/errors"
+
 	"github.com/wavesplatform/gowaves/pkg/crypto"
 	"github.com/wavesplatform/gowaves/pkg/proto"
 	"github.com/wavesplatform/gowaves/pkg/settings"
@@ -120,7 +121,7 @@ func run() error {
 	}
 	var js []byte
 	if config {
-		cfg := *settings.DefaultCustomSettings
+		cfg := settings.DefaultCustomSettings
 		cfg.Genesis = *block
 		cfg.AddressSchemeCharacter = sc
 		var err error
diff --git a/itests/config/genesis_settings.go b/itests/config/genesis_settings.go
index 07791d82e..61163947a 100644
--- a/itests/config/genesis_settings.go
+++ b/itests/config/genesis_settings.go
@@ -121,11 +121,12 @@ func newBlockchainConfig() (*config, []AccountInfo, error) {
 	cfg.FeaturesVotingPeriod = 1
 	cfg.VotesForFeatureActivation = 1
 	cfg.MinUpdateAssetInfoInterval = 2
-	for _, feature := range genSettings.PreactivatedFeatures {
-		cfg.PreactivatedFeatures = append(cfg.PreactivatedFeatures, feature.Feature)
+	cfg.PreactivatedFeatures = make([]int16, len(genSettings.PreactivatedFeatures))
+	for i, f := range genSettings.PreactivatedFeatures {
+		cfg.PreactivatedFeatures[i] = f.Feature
 	}
 	return &config{
-		BlockchainSettings: cfg,
+		BlockchainSettings: &cfg,
 		ScalaOpts:          &scalaCustomOptions{Features: genSettings.PreactivatedFeatures, EnableMining: false},
 	}, acc, nil
 }
diff --git a/itests/docker/docker.go b/itests/docker/docker.go
index 961556e53..d3563448b 100644
--- a/itests/docker/docker.go
+++ b/itests/docker/docker.go
@@ -36,8 +36,10 @@ const (
 
 const (
 	goNodeLogFileName    = "go-node.log"
+	goNodeErrFileName    = "go-node.err"
 	scalaNodeLogFileName = "scala-node.log"
-	logDir               = "../build/logs"
+	scalaNodeErrFileName = "scala-node.err"
+	logsDir              = "../build/logs"
 
 	walletPath = "wallet"
 )
@@ -58,8 +60,10 @@ type Docker struct {
 	network      *dockertest.Network
 	goNode       *dockertest.Resource
 	goLogFile    *os.File
+	goErrFile    *os.File
 	scalaNode    *dockertest.Resource
 	scalaLogFile *os.File
+	scalaErrFile *os.File
 }
 
 func NewDocker(suiteName string) (*Docker, error) {
@@ -112,7 +116,7 @@ func (d *Docker) RunContainers(ctx context.Context, paths config.ConfigPaths, su
 	if err != nil {
 		return nil, err
 	}
-	err = os.MkdirAll(filepath.Join(pwd, logDir, suiteName), os.ModePerm)
+	err = os.MkdirAll(filepath.Join(pwd, logsDir, suiteName), os.ModePerm)
 	if err != nil {
 		return nil, err
 	}
@@ -155,11 +159,21 @@ func (d *Docker) Finish(cancel context.CancelFunc) {
 			log.Warnf("Failed to close go-node logs file: %s", err)
 		}
 	}
+	if d.goErrFile != nil {
+		if err := d.goErrFile.Close(); err != nil {
+			log.Warnf("Failed to close go-node errors file: %s", err)
+		}
+	}
 	if d.scalaLogFile != nil {
 		if err := d.scalaLogFile.Close(); err != nil {
 			log.Warnf("Failed to close scala-node logs file: %s", err)
 		}
 	}
+	if d.scalaErrFile != nil {
+		if err := d.scalaErrFile.Close(); err != nil {
+			log.Warnf("Failed to close scala-node errors file: %s", err)
+		}
+	}
 }
 
 func (d *Docker) runGoNode(ctx context.Context, cfgPath string, suiteName string) (*dockertest.Resource, *PortConfig, error) {
@@ -199,7 +213,12 @@ func (d *Docker) runGoNode(ctx context.Context, cfgPath string, suiteName string
 		return nil, nil, err
 	}
 
-	logfile, err := os.Create(filepath.Clean(filepath.Join(pwd, logDir, suiteName, goNodeLogFileName)))
+	dir := filepath.Join(pwd, logsDir, suiteName)
+	logFile, err := os.Create(filepath.Clean(filepath.Join(dir, goNodeLogFileName)))
+	if err != nil {
+		return nil, nil, err
+	}
+	errFile, err := os.Create(filepath.Clean(filepath.Join(dir, goNodeErrFileName)))
 	if err != nil {
 		return nil, nil, err
 	}
@@ -215,13 +234,15 @@ func (d *Docker) runGoNode(ctx context.Context, cfgPath string, suiteName string
 
 			Container: res.Container.ID,
 
-			OutputStream: logfile,
+			OutputStream: logFile,
+			ErrorStream:  errFile,
 		})
 		if err != nil {
 			log.Warnf("Fail to get logs from go-node: %s", err)
 		}
 	}()
-	d.goLogFile = logfile
+	d.goLogFile = logFile
+	d.goErrFile = errFile
 
 	portCfg := &PortConfig{
 		RestApiPort: res.GetPort(RESTApiPort + tcp),
@@ -287,7 +308,12 @@ func (d *Docker) runScalaNode(ctx context.Context, cfgPath string, suiteName str
 		return nil, nil, err
 	}
 
-	logfile, err := os.Create(filepath.Clean(filepath.Join(pwd, logDir, suiteName, scalaNodeLogFileName)))
+	dir := filepath.Join(pwd, logsDir, suiteName)
+	logFile, err := os.Create(filepath.Clean(filepath.Join(dir, scalaNodeLogFileName)))
+	if err != nil {
+		return nil, nil, err
+	}
+	errFile, err := os.Create(filepath.Clean(filepath.Join(dir, scalaNodeErrFileName)))
 	if err != nil {
 		return nil, nil, err
 	}
@@ -303,13 +329,15 @@ func (d *Docker) runScalaNode(ctx context.Context, cfgPath string, suiteName str
 
 			Container: res.Container.ID,
 
-			OutputStream: logfile,
+			OutputStream: logFile,
+			ErrorStream:  errFile,
 		})
 		if err != nil {
 			log.Warnf("Fail to get logs from scala-node: %s", err)
 		}
 	}()
-	d.scalaLogFile = logfile
+	d.scalaLogFile = logFile
+	d.scalaErrFile = errFile
 
 	portCfg := &PortConfig{
 		RestApiPort: res.GetPort(RESTApiPort + tcp),
diff --git a/pkg/grpc/server/common_test.go b/pkg/grpc/server/common_test.go
index 937a7d999..b02d567f5 100644
--- a/pkg/grpc/server/common_test.go
+++ b/pkg/grpc/server/common_test.go
@@ -16,6 +16,9 @@ import (
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+
 	"github.com/wavesplatform/gowaves/pkg/crypto"
 	g "github.com/wavesplatform/gowaves/pkg/grpc/generated/waves/node/grpc"
 	"github.com/wavesplatform/gowaves/pkg/proto"
@@ -24,8 +27,6 @@ import (
 	"github.com/wavesplatform/gowaves/pkg/state"
 	"github.com/wavesplatform/gowaves/pkg/types"
 	"github.com/wavesplatform/gowaves/pkg/wallet"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/credentials/insecure"
 )
 
 const (
@@ -76,7 +77,7 @@ func customSettingsWithGenesis(t *testing.T, genesisPath string) *settings.Block
 	// This is needed because transactions from MainNet blockchain are used in tests' genesis blocks.
 	sets.AddressSchemeCharacter = settings.MainNetSettings.AddressSchemeCharacter
 	sets.BlockRewardTerm = 100000
-	return sets
+	return &sets
 }
 
 func stateWithCustomGenesis(t *testing.T, genesisPath string) state.State {
diff --git a/pkg/settings/blockchain_settings.go b/pkg/settings/blockchain_settings.go
index 872e99438..5c9190e18 100644
--- a/pkg/settings/blockchain_settings.go
+++ b/pkg/settings/blockchain_settings.go
@@ -145,7 +145,7 @@ var (
 			DelayDelta:   delayDeltaDefault,
 		},
 	}
-	DefaultCustomSettings = &BlockchainSettings{
+	DefaultCustomSettings = BlockchainSettings{
 		Type: Custom,
 		FunctionalitySettings: FunctionalitySettings{
 			FeaturesVotingPeriod:       5000,