enable exhaustruct linter

.golangci.yml

@@ -224,7 +224,6 @@ linters:
     - dupl
     - exhaustive
     - exhaustivestruct
-    - exhaustruct
     - forbidigo
     - funlen
     - gochecknoglobals
@@ -296,6 +295,7 @@ issues:
         - unused
         - unparam
         - gocritic
+        - exhaustruct
         - forcetypeassert
     - path: topic/topicreader/reader_example_test.go
       linters:

balancers/balancers.go

@@ -13,16 +13,29 @@ import (
 // Will be removed after Oct 2024.
 // Read about versioning policy: https://github.com/ydb-platform/ydb-go-sdk/blob/master/VERSIONING.md#deprecated
 func RoundRobin() *balancerConfig.Config {
-	return &balancerConfig.Config{}
+	return &balancerConfig.Config{
+		Filter:        nil,
+		AllowFallback: false,
+		SingleConn:    false,
+		DetectLocalDC: false,
+	}
 }
 
 func RandomChoice() *balancerConfig.Config {
-	return &balancerConfig.Config{}
+	return &balancerConfig.Config{
+		Filter:        nil,
+		AllowFallback: false,
+		SingleConn:    false,
+		DetectLocalDC: false,
+	}
 }
 
 func SingleConn() *balancerConfig.Config {
 	return &balancerConfig.Config{
-		SingleConn: true,
+		Filter:        nil,
+		AllowFallback: false,
+		SingleConn:    true,
+		DetectLocalDC: false,
 	}
 }
 

balancers/config.go

@@ -112,6 +112,7 @@ func FromConfig(config string, opts ...fromConfigOption) *balancerConfig.Config
 	var (
 		h = fromConfigOptionsHolder{
 			fallbackBalancer: Default(),
+			errorHandler:     nil,
 		}
 		b   *balancerConfig.Config
 		err error

config/defaults.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/ydb-platform/ydb-go-sdk/v3/balancers"
 	"github.com/ydb-platform/ydb-go-sdk/v3/credentials"
+	"github.com/ydb-platform/ydb-go-sdk/v3/internal/config"
 	"github.com/ydb-platform/ydb-go-sdk/v3/internal/stack"
 	"github.com/ydb-platform/ydb-go-sdk/v3/internal/xresolver"
 	"github.com/ydb-platform/ydb-go-sdk/v3/trace"
@@ -78,20 +79,31 @@ func certPool() *x509.CertPool {
 }
 
 func defaultTLSConfig() *tls.Config {
-	return &tls.Config{
-		MinVersion: tls.VersionTLS12,
-		RootCAs:    certPool(),
-	}
+	config := new(tls.Config)
+
+	config.MinVersion = tls.VersionTLS12
+	config.RootCAs = certPool()
+
+	return config
 }
 
 func defaultConfig() (c *Config) {
 	return &Config{
 		credentials: credentials.NewAnonymousCredentials(
 			credentials.WithSourceInfo(stack.Record(0)),
 		),
-		balancerConfig: balancers.Default(),
-		tlsConfig:      defaultTLSConfig(),
-		dialTimeout:    DefaultDialTimeout,
-		trace:          &trace.Driver{},
+		balancerConfig:                   balancers.Default(),
+		tlsConfig:                        defaultTLSConfig(),
+		dialTimeout:                      DefaultDialTimeout,
+		trace:                            new(trace.Driver),
+		Common:                           config.Common{},
+		connectionTTL:                    time.Duration(0),
+		secure:                           false,
+		endpoint:                         "",
+		database:                         "",
+		metaOptions:                      nil,
+		grpcOptions:                      nil,
+		meta:                             nil,
+		excludeGRPCCodesForPessimization: nil,
 	}
 }

driver.go

@@ -108,7 +108,7 @@ func (d *Driver) trace() *trace.Driver {
 		return d.config.Trace()
 	}
 
-	return &trace.Driver{}
+	return new(trace.Driver)
 }
 
 // Close closes Driver and clear resources
@@ -316,10 +316,9 @@ func newConnectionFromOptions(ctx context.Context, opts ...Option) (_ *Driver, e
 		}
 	}()
 
-	d := &Driver{
-		children:  make(map[uint64]*Driver),
-		ctxCancel: driverCtxCancel,
-	}
+	d := new(Driver)
+	d.children = make(map[uint64]*Driver)
+	d.ctxCancel = driverCtxCancel
 
 	if caFile, has := os.LookupEnv("YDB_SSL_ROOT_CERTIFICATES_FILE"); has {
 		d.opts = append(d.opts,