*: fix lint errors

- `unused`
- `errorlint: non-wrapping format verb for fmt.Errorf. Use `%w` to format
errors`
- `variable collides with imported package name`

Signed-off-by: Andrey Butusov <andrey@nspcc.io>

cmd/neofs-cli/internal/common/token.go

@@ -27,7 +27,7 @@ func ReadBearerToken(cmd *cobra.Command, flagname string) (*bearer.Token, error)
 
 	err = ReadBinaryOrJSON(cmd, &tok, path)
 	if err != nil {
-		return nil, fmt.Errorf("invalid bearer token: %v", err)
+		return nil, fmt.Errorf("invalid bearer token: %w", err)
 	}
 
 	return &tok, nil

cmd/neofs-cli/modules/acl/extended/create.go

@@ -72,13 +72,13 @@ func createEACL(cmd *cobra.Command, _ []string) error {
 	var containerID cid.ID
 	if cidArg != "" {
 		if err := containerID.DecodeString(cidArg); err != nil {
-			return fmt.Errorf("invalid container ID: %v\n", err)
+			return fmt.Errorf("invalid container ID: %w\n", err)
 		}
 	}
 
 	rulesFile, err := getRulesFromFile(fileArg)
 	if err != nil {
-		return fmt.Errorf("can't read rules from file: %v\n", err)
+		return fmt.Errorf("can't read rules from file: %w\n", err)
 	}
 
 	rules = append(rules, rulesFile...)

cmd/neofs-cli/modules/container/create.go

@@ -157,7 +157,7 @@ It will be stored in sidechain when inner ring will accepts it.`,
 			for ; ; t.Reset(waitInterval) {
 				select {
 				case <-ctx.Done():
-					return fmt.Errorf("container creation: %s", common.ErrAwaitTimeout)
+					return fmt.Errorf("container creation: %w", common.ErrAwaitTimeout)
 				case <-t.C:
 				}
 

cmd/neofs-cli/modules/container/delete.go

@@ -132,7 +132,7 @@ Only owner of the container has a permission to remove container.`,
 			for ; ; t.Reset(waitInterval) {
 				select {
 				case <-ctx.Done():
-					return fmt.Errorf("container deletion: %s", common.ErrAwaitTimeout)
+					return fmt.Errorf("container deletion: %w", common.ErrAwaitTimeout)
 				case <-t.C:
 				}
 

cmd/neofs-cli/modules/container/set_eacl.go

@@ -136,7 +136,7 @@ Container ID in EACL table will be substituted with ID from the CLI.`,
 			for ; ; t.Reset(waitInterval) {
 				select {
 				case <-ctx.Done():
-					return fmt.Errorf("eACL setting: %s", common.ErrAwaitTimeout)
+					return fmt.Errorf("eACL setting: %w", common.ErrAwaitTimeout)
 				case <-t.C:
 				}
 

cmd/neofs-cli/modules/container/util.go

@@ -49,7 +49,7 @@ func getSession(cmd *cobra.Command) (*session.Container, error) {
 
 	err := common.ReadBinaryOrJSON(cmd, &res, path)
 	if err != nil {
-		return nil, fmt.Errorf("read container session: %v", err)
+		return nil, fmt.Errorf("read container session: %w", err)
 	}
 
 	common.PrintVerbose(cmd, "Session successfully read.")

cmd/neofs-cli/modules/object/lock.go

@@ -32,7 +32,7 @@ var objectLockCmd = &cobra.Command{
 		var cnr cid.ID
 		err := cnr.DecodeString(cidRaw)
 		if err != nil {
-			return fmt.Errorf("Incorrect container arg: %v", err)
+			return fmt.Errorf("Incorrect container arg: %w", err)
 		}
 
 		oidsRaw, _ := cmd.Flags().GetStringSlice(commonflags.OIDFlag)

cmd/neofs-cli/modules/object/util.go

@@ -162,7 +162,7 @@ func getSession(cmd *cobra.Command) (*session.Object, error) {
 
 	err := common.ReadBinaryOrJSON(cmd, &tok, path)
 	if err != nil {
-		return nil, fmt.Errorf("read session: %v", err)
+		return nil, fmt.Errorf("read session: %w", err)
 	}
 
 	return &tok, nil

cmd/neofs-cli/modules/util/sign_session.go

@@ -63,7 +63,7 @@ func signSessionToken(cmd *cobra.Command, _ []string) error {
 	}
 
 	if errLast != nil {
-		return fmt.Errorf("decode session: %v", errLast)
+		return fmt.Errorf("decode session: %w", errLast)
 	}
 
 	pk, err := key.GetOrGenerate(cmd)

pkg/innerring/processors/neofs/process_assets.go

@@ -53,15 +53,15 @@ func (np *Processor) processDeposit(deposit *neofsEvent.Deposit) {
 
 	// get gas balance of the node
 	// before gas transfer check if the balance is greater than the threshold
-	balance, err := np.morphClient.GasBalance()
+	gasBalance, err := np.morphClient.GasBalance()
 	if err != nil {
 		np.log.Error("can't get gas balance of the node", zap.Error(err))
 		return
 	}
 
-	if balance < np.gasBalanceThreshold {
+	if gasBalance < np.gasBalanceThreshold {
 		np.log.Warn("gas balance threshold has been reached",
-			zap.Int64("balance", balance),
+			zap.Int64("balance", gasBalance),
 			zap.Int64("threshold", np.gasBalanceThreshold))
 
 		return

pkg/local_object_storage/engine/lock_test.go

@@ -1,7 +1,6 @@
 package engine
 
 import (
-	"context"
 	"os"
 	"strconv"
 	"testing"
@@ -20,14 +19,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-type tss struct {
-	expEpoch uint64
-}
-
-func (t tss) IsTombstoneAvailable(ctx context.Context, _ oid.Address, epoch uint64) bool {
-	return t.expEpoch >= epoch
-}
-
 func TestLockUserScenario(t *testing.T) {
 	// Tested user actions:
 	//   1. stores some object

pkg/services/object/get/remote.go

@@ -17,12 +17,12 @@ func (exec *execCtx) processNode(info client.NodeInfo) bool {
 
 	l.Debug("processing node...")
 
-	client, ok := exec.remoteClient(info)
+	remoteClient, ok := exec.remoteClient(info)
 	if !ok {
 		return true
 	}
 
-	obj, err := client.getObject(exec, info)
+	obj, err := remoteClient.getObject(exec, info)
 
 	var errSplitInfo *objectSDK.SplitInfoError