Merge pull request #36 from nspcc-dev/migrate-to-cdn-sdk

Migrate to CDN SDK
2020-12-11 10:25:59 +03:00 · 2020-12-11 10:25:59 +03:00 · ef7b480493
commit ef7b480493
parent 208c45a713 8ff289ea4f
34 changed files with 897 additions and 1908 deletions
--- a/12
+++ b/12
@ -20,7 +20,12 @@ RUN set -x \
    && export GOGC=off \
    && export CGO_ENABLED=0 \
    && [ -d "./vendor" ] || go mod vendor \
-    && go build -v -mod=vendor -trimpath -gcflags "all=-N -l" -ldflags "${LDFLAGS}" -o /go/bin/neofs-s3 ./cmd/gate \
+    && go build \
+      -v \
+      -mod=vendor \
+      -trimpath \
+      -ldflags "${LDFLAGS}" \
+      -o /go/bin/neofs-s3 ./cmd/gate \
    && upx -3 /go/bin/neofs-s3

 # Executable image
@ -28,8 +33,7 @@ FROM scratch

 WORKDIR /

-COPY --from=builder /go/bin/neofs-s3 /usr/bin/neofs-s3
+COPY --from=builder /go/bin/neofs-s3 /bin/neofs-s3
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

-# Run delve
-CMD ["/usr/bin/neofs-s3"]
+ENTRYPOINT ["/bin/neofs-s3"]
--- a/6
+++ b/6
@ -15,7 +15,7 @@ help:

 # Show current version
 version:
-	@echo $(VERSION)
+	@echo $(BUILD_VERSION)

 # Reformat code
 format:
@ -38,6 +38,6 @@ deps:
 image-build:
 	@echo "⇒ Build docker-image"
 	@docker build \
-		--build-arg VERSION=$(VERSION) \
+		--build-arg VERSION=$(BUILD_VERSION) \
 		 -f Dockerfile \
-		 -t nspccdev/neofs-s3-gate:$(VERSION) .
+		 -t nspccdev/neofs-s3-gate:$(BUILD_VERSION) .
--- a/README.md
+++ b/README.md
@ -16,45 +16,104 @@
      --rebalance_timer duration        set gRPC connection rebalance timer (default 15s)
      --max_clients_count int           set max-clients count (default 100)
      --max_clients_deadline duration   set max-clients deadline (default 30s)
-  -t, --con_ttl duration                set gRPC connection time to live (default 5m0s)
      --listen_address string           set address to listen (default "0.0.0.0:8080")
  -p, --peers stringArray               set NeoFS nodes

 # Environments

-S3_AUTH-KEY = 
-S3_CON_TTL = 5m0s
-S3_CONNECT_TIMEOUT = 30s
-S3_KEEPALIVE_PERMIT_WITHOUT_STREAM = true
-S3_KEEPALIVE_TIME = 10s
-S3_KEEPALIVE_TIMEOUT = 10s
-S3_LISTEN_ADDRESS = 0.0.0.0:8080
-S3_LOGGER_FORMAT = console
-S3_LOGGER_LEVEL = debug
-S3_LOGGER_NO_DISCLAIMER = true
-S3_LOGGER_SAMPLING_INITIAL = 1000
-S3_LOGGER_SAMPLING_THEREAFTER = 1000
-S3_LOGGER_TRACE_LEVEL = panic
-S3_MAX_CLIENTS_COUNT = 100
-S3_MAX_CLIENTS_DEADLINE = 30s
-S3_METRICS = false
-S3_NEOFS-KEY = generated
-S3_PPROF = false
-S3_REBALANCE_TIMER = 15s
-S3_REQUEST_TIMEOUT = 15s
-S3_VERBOSE = false
+S3_GW_AUTH-KEY = 
+S3_GW_NEOFS-KEY =
+S3_GW_CONNECT_TIMEOUT = 30s
+S3_GW_REBALANCE_TIMER = 15s
+S3_GW_REQUEST_TIMEOUT = 15s
+S3_GW_KEEPALIVE_PERMIT_WITHOUT_STREAM = true
+S3_GW_KEEPALIVE_TIME = 10s
+S3_GW_KEEPALIVE_TIMEOUT = 10s
+S3_GW_LISTEN_ADDRESS = 0.0.0.0:8080
+S3_GW_LOGGER_FORMAT = console
+S3_GW_LOGGER_LEVEL = debug
+S3_GW_LOGGER_NO_DISCLAIMER = true
+S3_GW_LOGGER_SAMPLING_INITIAL = 1000
+S3_GW_LOGGER_SAMPLING_THEREAFTER = 1000
+S3_GW_LOGGER_TRACE_LEVEL = panic
+S3_GW_MAX_CLIENTS_COUNT = 100
+S3_GW_MAX_CLIENTS_DEADLINE = 30s
+S3_GW_METRICS = false
+S3_GW_PPROF = false
+S3_GW_VERBOSE = false

 # Peers preset

-S3_PEERS_[N]_ADDRESS = string
-S3_PEERS_[N]_WEIGHT = 0..1 (float)
+S3_GW_PEERS_[N]_ADDRESS = string
+S3_GW_PEERS_[N]_WEIGHT = 0..1 (float)
 ```

---
-<footer>
+## Reference Resources

-#### MinIO Fork
+* [AWS S3 API Reference](https://docs.aws.amazon.com/AmazonS3/latest/API/s3-api.pdf)

-Forked from https://github.com/minio/minio (https://github.com/minio/minio/releases/tag/RELEASE.2020-07-02T00-15-09Z)

-</footer>
+### Bucket/Object-Level Actions
+
+| #   | Method Name               | Status                  |
+|:---:| ------------------------- | ----------------------- |
+| 1   | AbortMultipartUpload      | Unsupported             |
+| 2   | CompleteMultipartUpload   | Unsupported             |
+| 3   | CopyObject                | Supported               |
+| 4   | CopyObjectPart            | Unsupported             |
+| 5   | DeleteBucket              | Unsupported             |
+| 6   | DeleteBucketEncryption    | Unsupported             |
+| 7   | DeleteBucketLifecycle     | Unsupported             |
+| 8   | DeleteBucketPolicy        | Unsupported             |
+| 9   | DeleteBucketTagging       | Unsupported             |
+| 10  | DeleteBucketWebsite       | Unsupported             |
+| 11  | DeleteMultipleObjects     | Supported               |
+| 12  | DeleteObject              | Supported               |
+| 13  | DeleteObjectTagging       | Unsupported             |
+| 14  | GetBucketACL              | Unsupported             |
+| 15  | GetBucketAccelerate       | Supported               |
+| 16  | GetBucketCors             | Unsupported             |
+| 17  | GetBucketEncryption       | Unsupported             |
+| 18  | GetBucketLifecycle        | Unsupported             |
+| 19  | GetBucketLocation         | Unsupported             |
+| 20  | GetBucketLogging          | Unsupported             |
+| 21  | GetBucketNotification     | Unsupported             |
+| 22  | GetBucketObjectLockConfig | Unsupported             |
+| 23  | GetBucketPolicy           | Unsupported             |
+| 24  | GetBucketReplication      | Unsupported             |
+| 25  | GetBucketRequestPayment   | Unsupported             |
+| 26  | GetBucketTagging          | Unsupported             |
+| 27  | GetBucketVersioning       | Unsupported             |
+| 28  | GetBucketWebsite          | Unsupported             |
+| 29  | GetObject                 | Supported               |
+| 30  | GetObjectACL              | Unsupported             |
+| 31  | GetObjectLegalHold        | Unsupported             |
+| 32  | GetObjectRetention        | Unsupported             |
+| 33  | HeadBucket                | Supported               |
+| 34  | HeadObject                | Supported               |
+| 35  | ListBucketObjectVersions  | Unsupported             |
+| 36  | ListBuckets               | Supported               |
+| 37  | ListMultipartUploads      | Unsupported             |
+| 38  | ListObjectParts           | Unsupported             |
+| 39  | ListObjectsV1             | Supported               |
+| 40  | ListObjectsV2             | Supported               |
+| 41  | ListenBucketNotification  | Unsupported             |
+| 42  | NewMultipartUpload        | Unsupported             |
+| 43  | PostPolicyBucket          | Unsupported             |
+| 44  | PutBucket                 | Unsupported             |
+| 45  | PutBucketACL              | Unsupported             |
+| 46  | PutBucketEncryption       | Unsupported             |
+| 47  | PutBucketLifecycle        | Unsupported             |
+| 48  | PutBucketNotification     | Unsupported             |
+| 49  | PutBucketObjectLockConfig | Unsupported             |
+| 50  | PutBucketPolicy           | Unsupported             |
+| 51  | PutBucketTagging          | Unsupported             |
+| 52  | PutBucketVersioning       | Unsupported             |
+| 53  | PutObject                 | Supported               |
+| 54  | PutObjectACL              | Unsupported             |
+| 55  | PutObjectLegalHold        | Unsupported             |
+| 56  | PutObjectPart             | Unsupported             |
+| 57  | PutObjectRetention        | Unsupported             |
+| 58  | PutObjectTagging          | Unsupported             |
+| 59  | SelectObjectContent       | Unsupported             |
+
--- a/api/auth/center.go
+++ b/api/auth/center.go
@ -0,0 +1,161 @@
+package auth
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	v4 "github.com/aws/aws-sdk-go/aws/signer/v4"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/bearer"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/hcs"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/s3"
+	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-api-go/pkg/token"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+)
+
+var authorizationFieldRegexp = regexp.MustCompile(`AWS4-HMAC-SHA256 Credential=(?P<access_key_id_cid>[^/]+)/(?P<access_key_id_oid>[^/]+)/(?P<date>[^/]+)/(?P<region>[^/]*)/(?P<service>[^/]+)/aws4_request,\s*SignedHeaders=(?P<signed_header_fields>.+),\s*Signature=(?P<v4_signature>.+)`)
+
+type (
+	Center interface {
+		Authenticate(request *http.Request) (*token.BearerToken, error)
+	}
+
+	center struct {
+		reg *regexpSubmatcher
+		cli bearer.Credentials
+	}
+
+	Params struct {
+		Client     sdk.Client
+		Logger     *zap.Logger
+		Credential hcs.Credentials
+	}
+
+	prs int
+)
+
+func (p prs) Read(_ []byte) (n int, err error) {
+	panic("implement me")
+}
+
+func (p prs) Seek(_ int64, _ int) (int64, error) {
+	panic("implement me")
+}
+
+var _ io.ReadSeeker = prs(0)
+
+// New creates an instance of AuthCenter.
+func New(obj sdk.ObjectClient, key hcs.PrivateKey) Center {
+	return &center{
+		cli: bearer.New(obj, key),
+		reg: &regexpSubmatcher{re: authorizationFieldRegexp},
+	}
+}
+
+func (c *center) Authenticate(r *http.Request) (*token.BearerToken, error) {
+	queryValues := r.URL.Query()
+	if queryValues.Get("X-Amz-Algorithm") == "AWS4-HMAC-SHA256" {
+		return nil, errors.New("pre-signed form of request is not supported")
+	}
+
+	authHeaderField := r.Header["Authorization"]
+	if len(authHeaderField) != 1 {
+		return nil, errors.New("unsupported request: wrong length of Authorization header field")
+	}
+
+	// { // to debug request
+	// 	data, _ := httputil.DumpRequest(r, false)
+	// 	fmt.Println(string(data))
+	// }
+
+	sms1 := c.reg.getSubmatches(authHeaderField[0])
+	if len(sms1) != 7 {
+		return nil, errors.New("bad Authorization header field")
+	}
+
+	signedHeaderFieldsNames := strings.Split(sms1["signed_header_fields"], ";")
+	if len(signedHeaderFieldsNames) == 0 {
+		return nil, errors.New("wrong format of signed headers part")
+	}
+
+	signatureDateTime, err := time.Parse("20060102T150405Z", r.Header.Get("X-Amz-Date"))
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to parse x-amz-date header field")
+	}
+
+	accessKeyID := fmt.Sprintf("%s/%s", sms1["access_key_id_cid"], sms1["access_key_id_oid"])
+
+	address := object.NewAddress()
+	if err = address.Parse(accessKeyID); err != nil {
+		return nil, errors.Wrapf(err, "could not parse AccessBox address: %s", accessKeyID)
+	}
+
+	tkn, err := c.cli.Get(r.Context(), address)
+	if err != nil {
+		return nil, err
+	}
+
+	secret, err := s3.SecretAccessKey(tkn)
+	if err != nil {
+		return nil, err
+	}
+
+	otherRequest := r.Clone(context.TODO())
+	otherRequest.Header = map[string][]string{}
+
+	for hfn, hfvs := range r.Header {
+		for _, shfn := range signedHeaderFieldsNames {
+			if strings.EqualFold(hfn, shfn) {
+				otherRequest.Header[hfn] = hfvs
+			}
+		}
+	}
+
+	awsCreds := credentials.NewStaticCredentials(accessKeyID, secret, "")
+	signer := v4.NewSigner(awsCreds)
+
+	// body, err := readAndKeepBody(r)
+	// if err != nil {
+	// 	return nil, errors.Wrap(err, "failed to read out request body")
+	// }
+	//
+	// _ = body
+
+	// body not required
+	if _, err := signer.Sign(otherRequest, nil, sms1["service"], sms1["region"], signatureDateTime); err != nil {
+		return nil, errors.Wrap(err, "failed to sign temporary HTTP request")
+	}
+
+	sms2 := c.reg.getSubmatches(otherRequest.Header.Get("Authorization"))
+	if sms1["v4_signature"] != sms2["v4_signature"] {
+		return nil, errors.New("failed to pass authentication procedure")
+	}
+
+	return tkn, nil
+}
+
+// for debug reasons
+// func panicSeeker() io.ReadSeeker { return prs(0) }
+
+// TODO: Make this write into a smart buffer backed by a file on a fast drive.
+// func readAndKeepBody(request *http.Request) (*bytes.Reader, error) {
+// 	if request.Body == nil {
+// 		return new(bytes.Reader), nil
+// 	}
+//
+// 	payload, err := ioutil.ReadAll(request.Body)
+// 	if err != nil {
+// 		return nil, err
+// 	}
+//
+// 	request.Body = ioutil.NopCloser(bytes.NewReader(payload))
+// 	return bytes.NewReader(payload), nil
+// }
--- a/api/auth/regexp-utils.go
+++ b/api/auth/regexp-utils.go
@ -0,0 +1,20 @@
+package auth
+
+import "regexp"
+
+type regexpSubmatcher struct {
+	re *regexp.Regexp
+}
+
+func (r *regexpSubmatcher) getSubmatches(target string) map[string]string {
+	matches := r.re.FindStringSubmatch(target)
+	l := len(matches)
+
+	sub := make(map[string]string, l)
+	for i, name := range r.re.SubexpNames() {
+		if i > 0 && i <= l {
+			sub[name] = matches[i]
+		}
+	}
+	return sub
+}
--- a/api/handler/get.go
+++ b/api/handler/get.go
@ -1,8 +1,10 @@
 package handler

 import (
+	"io"
 	"net/http"
 	"strconv"
+	"sync"

 	"github.com/gorilla/mux"
 	"github.com/nspcc-dev/neofs-s3-gate/api"
@ -10,6 +12,31 @@ import (
 	"go.uber.org/zap"
 )

+type (
+	detector struct {
+		io.Writer
+		sync.Once
+
+		contentType string
+	}
+)
+
+func newDetector(w io.Writer) *detector {
+	return &detector{Writer: w}
+}
+
+func (d *detector) Write(data []byte) (int, error) {
+	d.Once.Do(func() {
+		if rw, ok := d.Writer.(http.ResponseWriter); ok {
+			rw.WriteHeader(http.StatusOK)
+		}
+
+		d.contentType = http.DetectContentType(data)
+	})
+
+	return d.Writer.Write(data)
+}
+
 func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 	var (
 		err error
@ -37,10 +64,12 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

+	writer := newDetector(w)
+
 	params := &layer.GetObjectParams{
 		Bucket: inf.Bucket,
 		Object: inf.Name,
-		Writer: w,
+		Writer: writer,
 	}

 	// params.Length = inf.Size
@ -61,9 +90,7 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	w.Header().Set("Content-Type", inf.ContentType)
+	w.Header().Set("Content-Type", writer.contentType)
 	w.Header().Set("Last-Modified", inf.Created.Format(http.TimeFormat))
 	w.Header().Set("Content-Length", strconv.FormatInt(inf.Size, 10))
-
-	w.WriteHeader(http.StatusOK)
 }
--- a/api/handler/list.go
+++ b/api/handler/list.go
@ -6,10 +6,8 @@ import (
 	"time"

 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	"github.com/nspcc-dev/neofs-s3-gate/api"
 	"github.com/nspcc-dev/neofs-s3-gate/api/layer"
-	"github.com/nspcc-dev/neofs-s3-gate/auth"
 	"go.uber.org/zap"
 )

@ -29,37 +27,10 @@ func (h *handler) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
 	var (
 		err error
 		own = owner.NewID()
-		tkn *token.BearerToken
 		res *ListBucketsResponse
 		rid = api.GetRequestID(r.Context())
 	)

-	if tkn, err = auth.GetBearerToken(r.Context()); err != nil {
-		h.log.Error("something went wrong",
-			zap.String("request_id", rid),
-			zap.Error(err))
-
-		api.WriteErrorResponse(r.Context(), w, api.Error{
-			Code:           api.GetAPIError(api.ErrInternalError).Code,
-			Description:    err.Error(),
-			HTTPStatusCode: http.StatusInternalServerError,
-		}, r.URL)
-
-		return
-	} else if own, err = layer.GetOwnerID(tkn); err != nil {
-		h.log.Error("something went wrong",
-			zap.String("request_id", rid),
-			zap.Error(err))
-
-		api.WriteErrorResponse(r.Context(), w, api.Error{
-			Code:           api.GetAPIError(api.ErrBadRequest).Code,
-			Description:    err.Error(),
-			HTTPStatusCode: http.StatusBadRequest,
-		}, r.URL)
-
-		return
-	}
-
 	list, err := h.obj.ListBuckets(r.Context())
 	if err != nil {
 		h.log.Error("something went wrong",
--- a/api/handler/put.go
+++ b/api/handler/put.go
@ -30,20 +30,6 @@ func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 			HTTPStatusCode: http.StatusBadRequest,
 		}, r.URL)

-		return
-	} else if _, err = h.obj.GetObjectInfo(r.Context(), bkt, obj); err == nil {
-		h.log.Error("object exists",
-			zap.String("request_id", rid),
-			zap.String("bucket_name", bkt),
-			zap.String("object_name", obj),
-			zap.Error(err))
-
-		api.WriteErrorResponse(r.Context(), w, api.Error{
-			Code:           api.GetAPIError(api.ErrMethodNotAllowed).Code,
-			Description:    "Object: " + bkt + "#" + obj + " already exists",
-			HTTPStatusCode: http.StatusBadRequest,
-		}, r.URL)
-
 		return
 	}

--- a/api/layer/container.go
+++ b/api/layer/container.go
@ -5,11 +5,9 @@ import (
 	"strconv"
 	"time"

-	"github.com/nspcc-dev/neofs-api-go/pkg/client"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
 	"github.com/nspcc-dev/neofs-s3-gate/api"
-	"github.com/nspcc-dev/neofs-s3-gate/auth"
 	"go.uber.org/zap"
 )

@ -32,6 +30,8 @@ type (

 func (n *layer) containerInfo(ctx context.Context, cid *container.ID) (*BucketInfo, error) {
 	var (
+		err error
+		res *container.Container
 		rid = api.GetRequestID(ctx)

 		info = &BucketInfo{
@ -40,29 +40,7 @@ func (n *layer) containerInfo(ctx context.Context, cid *container.ID) (*BucketIn
 		}
 	)

-	bearer, err := auth.GetBearerToken(ctx)
-	if err != nil {
-		n.log.Error("could not receive bearer token",
-			zap.Stringer("cid", cid),
-			zap.String("request_id", rid),
-			zap.Error(err))
-		return nil, err
-	}
-
-	_ = bearer
-
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		n.log.Error("could not prepare client",
-			zap.Stringer("cid", cid),
-			zap.String("request_id", rid),
-			zap.Error(err))
-
-		return nil, err
-	}
-
-	res, err := cli.GetContainer(ctx, cid, client.WithSession(tkn))
-	if err != nil {
+	if res, err = n.cli.Container().Get(ctx, cid); err != nil {
 		n.log.Error("could not fetch container",
 			zap.Stringer("cid", cid),
 			zap.String("request_id", rid),
@ -71,14 +49,14 @@ func (n *layer) containerInfo(ctx context.Context, cid *container.ID) (*BucketIn
 		return nil, err
 	}

-	info.Owner = owner.NewIDFromV2(res.GetOwnerID())
+	info.Owner = res.OwnerID()

-	for _, attr := range res.GetAttributes() {
-		switch key, val := attr.GetKey(), attr.GetValue(); key {
+	for _, attr := range res.Attributes() {
+		switch key, val := attr.Key(), attr.Value(); key {
 		case container.AttributeName:
 			info.Name = val
 		case container.AttributeTimestamp:
-			unix, err := strconv.ParseInt(attr.GetValue(), 10, 64)
+			unix, err := strconv.ParseInt(attr.Value(), 10, 64)
 			if err != nil {
 				n.log.Error("could not parse container creation time",
 					zap.Stringer("cid", cid),
@ -97,35 +75,14 @@ func (n *layer) containerInfo(ctx context.Context, cid *container.ID) (*BucketIn
 }

 func (n *layer) containerList(ctx context.Context) ([]*BucketInfo, error) {
-	rid := api.GetRequestID(ctx)
-	bearer, err := auth.GetBearerToken(ctx)
-	if err != nil {
-		n.log.Error("could not receive bearer token",
-			zap.String("request_id", rid),
-			zap.Error(err))
-		return nil, err
-	}
+	var (
+		err error
+		own = n.Owner(ctx)
+		res []*container.ID
+		rid = api.GetRequestID(ctx)
+	)

-	_ = bearer
-
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		n.log.Error("could not prepare client",
-			zap.String("request_id", rid),
-			zap.Error(err))
-		return nil, err
-	}
-
-	// own, err := GetOwnerID(bearer)
-	// if err != nil {
-	// 	n.log.Error("could not fetch owner id",
-	// 		zap.String("request_id", rid),
-	// 		zap.Error(err))
-	// 	return nil, err
-	// }
-
-	res, err := cli.ListContainers(ctx, tkn.OwnerID(), client.WithSession(tkn))
-	if err != nil {
+	if res, err = n.cli.Container().List(ctx, own); err != nil {
 		n.log.Error("could not fetch container",
 			zap.String("request_id", rid),
 			zap.Error(err))
--- a/api/layer/detector.go
+++ b/api/layer/detector.go
@ -0,0 +1,26 @@
+package layer
+
+import (
+	"io"
+	"net/http"
+	"sync"
+)
+
+type detector struct {
+	io.Reader
+	sync.Once
+
+	contentType string
+}
+
+func newDetector(r io.Reader) *detector {
+	return &detector{Reader: r}
+}
+
+func (d *detector) Read(data []byte) (int, error) {
+	d.Do(func() {
+		d.contentType = http.DetectContentType(data)
+	})
+
+	return d.Reader.Read(data)
+}
--- a/api/layer/layer.go
+++ b/api/layer/layer.go
@ -2,19 +2,18 @@ package layer

 import (
 	"context"
-	"crypto/ecdsa"
 	"io"
 	"net/url"
 	"strings"
 	"time"

-	"github.com/nspcc-dev/neofs-api-go/pkg"
-	"github.com/nspcc-dev/neofs-api-go/pkg/client"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/neofs"
+	"github.com/nspcc-dev/cdn-neofs-sdk/pool"
+	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	"github.com/nspcc-dev/neofs-s3-gate/api"
-	"github.com/nspcc-dev/neofs-s3-gate/api/pool"
 	"github.com/pkg/errors"
 	"go.uber.org/zap"
 	"google.golang.org/grpc/codes"
@ -23,19 +22,15 @@ import (

 type (
 	layer struct {
-		uid *owner.ID
+		cli sdk.Client
 		log *zap.Logger
-		cli pool.Client
-		key *ecdsa.PrivateKey
-
-		reqTimeout time.Duration
 	}

 	Params struct {
-		Pool    pool.Client
-		Logger  *zap.Logger
-		Timeout time.Duration
-		NFKey   *ecdsa.PrivateKey
+		Pool       pool.Client
+		Logger     *zap.Logger
+		Timeout    time.Duration
+		Credential neofs.Credentials
 	}

 	GetObjectParams struct {
@ -86,38 +81,32 @@ type (
 	}
 )

+var (
+	ErrObjectExists    = errors.New("object exists")
+	ErrObjectNotExists = errors.New("object not exists")
+)
+
 // NewGatewayLayer creates instance of layer. It checks credentials
 // and establishes gRPC connection with node.
-func NewLayer(p *Params) (Client, error) {
-	wallet, err := owner.NEO3WalletFromPublicKey(&p.NFKey.PublicKey)
-	if err != nil {
-		return nil, err
+func NewLayer(log *zap.Logger, cli sdk.Client) Client {
+	return &layer{
+		cli: cli,
+		log: log,
+	}
+}
+
+// Owner returns owner id from BearerToken (context) or from client owner.
+func (n *layer) Owner(ctx context.Context) *owner.ID {
+	if tkn, err := sdk.BearerToken(ctx); err != nil && tkn != nil {
+		return tkn.Issuer()
 	}

-	uid := owner.NewID()
-	uid.SetNeo3Wallet(wallet)
-
-	return &layer{
-		uid: uid,
-		cli: p.Pool,
-		key: p.NFKey,
-		log: p.Logger,
-
-		reqTimeout: p.Timeout,
-	}, nil
+	return n.cli.Owner()
 }

 // Get NeoFS Object by refs.Address (should be used by auth.Center)
 func (n *layer) Get(ctx context.Context, address *object.Address) (*object.Object, error) {
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	gop := new(client.GetObjectParams)
-	gop.WithAddress(address)
-
-	return cli.GetObject(ctx, gop, client.WithSession(tkn))
+	return n.cli.Object().Get(ctx, address)
 }

 // GetBucketInfo returns bucket name.
@ -221,9 +210,9 @@ func (n *layer) ListObjects(ctx context.Context, p *ListObjectsParams) (*ListObj
 				oi = objectInfoFromMeta(bkt, meta)
 			} else { // if there are sub-entities in tail - dir
 				oi = &ObjectInfo{
-					id: meta.GetID(),
+					id: meta.ID(),

-					Owner:  meta.GetOwnerID(),
+					Owner:  meta.OwnerID(),
 					Bucket: bkt.Name,
 					Name:   tail[:ind+1], // dir MUST have slash symbol in the end
 					// IsDir:  true,
@ -263,7 +252,7 @@ func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) error {
 	_, err = n.objectGet(ctx, &getParams{
 		Writer: p.Writer,

-		addr: addr,
+		address: addr,

 		offset: p.Offset,
 		length: p.Length,
@ -272,6 +261,20 @@ func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) error {
 	return err
 }

+func (n *layer) checkObject(ctx context.Context, cid *container.ID, filename string) error {
+	var err error
+
+	if _, err = n.objectFindID(ctx, &findParams{cid: cid, val: filename}); err == nil {
+		return ErrObjectExists
+	} else if state, ok := status.FromError(err); !ok || state == nil {
+		return err
+	} else if state.Code() == codes.NotFound {
+		return ErrObjectNotExists
+	}
+
+	return err
+}
+
 // GetObjectInfo returns meta information about the object.
 func (n *layer) GetObjectInfo(ctx context.Context, bucketName, filename string) (*ObjectInfo, error) {
 	var (
@ -282,8 +285,10 @@ func (n *layer) GetObjectInfo(ctx context.Context, bucketName, filename string)
 	)

 	if bkt, err = n.GetBucketInfo(ctx, bucketName); err != nil {
+		n.log.Error("could not fetch bucket info", zap.Error(err))
 		return nil, err
 	} else if oid, err = n.objectFindID(ctx, &findParams{cid: bkt.CID, val: filename}); err != nil {
+		n.log.Error("could not find object id", zap.Error(err))
 		return nil, err
 	}

@ -292,23 +297,13 @@ func (n *layer) GetObjectInfo(ctx context.Context, bucketName, filename string)
 	addr.SetContainerID(bkt.CID)

 	if meta, err = n.objectHead(ctx, addr); err != nil {
+		n.log.Error("could not fetch object head", zap.Error(err))
 		return nil, err
 	}

 	return objectInfoFromMeta(bkt, meta), nil
 }

-func GetOwnerID(tkn *token.BearerToken) (*owner.ID, error) {
-
-	switch pkg.SDKVersion().GetMajor() {
-	case 2:
-		id := tkn.ToV2().GetBody().GetOwnerID()
-		return owner.NewIDFromV2(id), nil
-	default:
-		return nil, errors.New("unknown version")
-	}
-}
-
 // PutObject into storage.
 func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*ObjectInfo, error) {
 	return n.objectPut(ctx, p)
--- a/api/layer/object.go
+++ b/api/layer/object.go
@ -1,20 +1,15 @@
 package layer

 import (
-	"bufio"
-	"bytes"
 	"context"
 	"io"
-	"net/http"
 	"net/url"
 	"strconv"
 	"time"

-	"github.com/nspcc-dev/neofs-api-go/pkg/client"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
-	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	"github.com/nspcc-dev/neofs-s3-gate/api"
 	"github.com/pkg/errors"
 	"google.golang.org/grpc/codes"
@ -30,57 +25,24 @@ type (
 	getParams struct {
 		io.Writer

-		addr *object.Address
-
-		offset int64
-		length int64
+		offset  int64
+		length  int64
+		address *object.Address
 	}
 )

-func (n *layer) prepareClient(ctx context.Context) (*client.Client, *token.SessionToken, error) {
-	conn, err := n.cli.Connection(ctx)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	tkn, err := n.cli.Token(ctx, conn)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	cli, err := client.New(n.key, client.WithGRPCConnection(conn))
-	if err != nil {
-		return nil, nil, err
-	}
-
-	return cli, tkn, nil
-}
-
 // objectSearch returns all available objects by search params.
 func (n *layer) objectSearch(ctx context.Context, p *findParams) ([]*object.ID, error) {
-	filename, err := url.QueryUnescape(p.val)
-	if err != nil {
+	opts := []sdk.ObjectSearchOption{
+		sdk.SearchRootObjects(),
+	}
+
+	if filename, err := url.QueryUnescape(p.val); err != nil {
 		return nil, err
+	} else if filename != "" {
+		opts = append(opts, sdk.SearchByFilename(filename))
 	}
-
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	filter := object.NewSearchFilters()
-	filter.AddRootFilter()
-
-	sop := new(client.SearchObjectParams)
-	sop.WithContainerID(p.cid)
-
-	if p.val != "" {
-		filter.AddFilter(object.AttributeFileName, filename, object.MatchStringEqual)
-	}
-
-	sop.WithSearchFilters(filter)
-
-	return cli.SearchObject(ctx, sop, client.WithSession(tkn))
+	return n.cli.Object().Search(ctx, p.cid, opts...)
 }

 // objectFindID returns object id (uuid) based on it's nice name in s3. If
@ -98,36 +60,15 @@ func (n *layer) objectFindID(ctx context.Context, p *findParams) (*object.ID, er
 }

 // objectHead returns all object's headers.
-func (n *layer) objectHead(ctx context.Context, addr *object.Address) (*object.Object, error) {
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	ohp := new(client.ObjectHeaderParams)
-	ohp.WithAddress(addr)
-	ohp.WithAllFields()
-
-	return cli.GetObjectHeader(ctx, ohp, client.WithSession(tkn))
+func (n *layer) objectHead(ctx context.Context, address *object.Address) (*object.Object, error) {
+	return n.cli.Object().Head(ctx, address, sdk.WithFullHeaders())
 }

 // objectGet and write it into provided io.Reader.
 func (n *layer) objectGet(ctx context.Context, p *getParams) (*object.Object, error) {
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		return nil, err
-	}
-
 	// prepare length/offset writer
-	b := bufio.NewWriter(p.Writer)
-	w := newWriter(b, p.offset, p.length)
-	writer := newWriter(w, p.offset, p.length)
-
-	gop := new(client.GetObjectParams)
-	gop.WithAddress(p.addr)
-	gop.WithPayloadWriter(writer)
-
-	return cli.GetObject(ctx, gop, client.WithSession(tkn))
+	w := newWriter(p.Writer, p.offset, p.length)
+	return n.cli.Object().Get(ctx, p.address, sdk.WithGetWriter(w))
 }

 // objectPut into NeoFS, took payload from io.Reader.
@ -135,38 +76,25 @@ func (n *layer) objectPut(ctx context.Context, p *PutObjectParams) (*ObjectInfo,
 	var (
 		err error
 		obj string
-		own *owner.ID
-		oid *object.ID
 		bkt *BucketInfo
-		// brt *token.BearerToken
+		own = n.Owner(ctx)
+
+		address *object.Address
 	)

-	// if brt, err = auth.GetBearerToken(ctx); err != nil {
-	// 	return nil, err
-	// }
-
-	// else if own, err = GetOwnerID(brt); err != nil {
-	// 	return nil, err
-	// }
-
-	_ = own
-
 	if obj, err = url.QueryUnescape(p.Object); err != nil {
 		return nil, err
 	} else if bkt, err = n.GetBucketInfo(ctx, p.Bucket); err != nil {
 		return nil, err
-	} else if _, err = n.objectFindID(ctx, &findParams{cid: bkt.CID, val: p.Object}); err == nil {
+	} else if err = n.checkObject(ctx, bkt.CID, p.Object); err != nil && err != ErrObjectNotExists {
+		return nil, err
+	} else if err == ErrObjectExists {
 		return nil, &api.ObjectAlreadyExists{
 			Bucket: p.Bucket,
 			Object: p.Object,
 		}
 	}

-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		return nil, err
-	}
-
 	attributes := make([]*object.Attribute, 0, len(p.Header)+1)

 	unix := strconv.FormatInt(time.Now().UTC().Unix(), 10)
@ -189,44 +117,30 @@ func (n *layer) objectPut(ctx context.Context, p *PutObjectParams) (*ObjectInfo,
 		attributes = append(attributes, ua)
 	}

-	b := new(bytes.Buffer)
-	r := io.TeeReader(p.Reader, b)
-
 	raw := object.NewRaw()
-	raw.SetOwnerID(tkn.OwnerID()) // should be replaced with BearerToken.Issuer()
+	raw.SetOwnerID(own)
 	raw.SetContainerID(bkt.CID)
 	raw.SetAttributes(attributes...)

-	pop := new(client.PutObjectParams)
-	pop.WithPayloadReader(r)
-	pop.WithObject(raw.Object())
-
-	if oid, err = cli.PutObject(ctx, pop, client.WithSession(tkn)); err != nil {
-		return nil, errors.Wrapf(err, "owner_id = %s", tkn.OwnerID())
+	r := newDetector(p.Reader)
+	if address, err = n.cli.Object().Put(ctx, raw.Object(), sdk.WithPutReader(r)); err != nil {
+		return nil, err
 	}

 	return &ObjectInfo{
-		id: oid,
+		id: address.ObjectID(),

+		Owner:       own,
 		Bucket:      p.Bucket,
 		Name:        p.Object,
 		Size:        p.Size,
 		Created:     time.Now(),
-		ContentType: http.DetectContentType(b.Bytes()),
-		Owner:       own,
 		Headers:     p.Header,
+		ContentType: r.contentType,
 	}, nil
 }

 // objectDelete puts tombstone object into neofs.
 func (n *layer) objectDelete(ctx context.Context, address *object.Address) error {
-	cli, tkn, err := n.prepareClient(ctx)
-	if err != nil {
-		return err
-	}
-
-	dob := new(client.DeleteObjectParams)
-	dob.WithAddress(address)
-
-	return cli.DeleteObject(ctx, dob, client.WithSession(tkn))
+	return n.cli.Object().Delete(ctx, address)
 }
--- a/api/layer/util.go
+++ b/api/layer/util.go
@ -55,7 +55,7 @@ func userHeaders(attrs []*object.Attribute) map[string]string {
 	result := make(map[string]string, len(attrs))

 	for _, attr := range attrs {
-		result[attr.GetKey()] = attr.GetValue()
+		result[attr.Key()] = attr.Value()
 	}

 	return result
@ -64,10 +64,10 @@ func userHeaders(attrs []*object.Attribute) map[string]string {
 func objectInfoFromMeta(bkt *BucketInfo, meta *object.Object) *ObjectInfo {
 	var (
 		creation time.Time
-		filename = meta.GetID().String()
+		filename = meta.ID().String()
 	)

-	userHeaders := userHeaders(meta.GetAttributes())
+	userHeaders := userHeaders(meta.Attributes())
 	if val, ok := userHeaders[object.AttributeFileName]; ok {
 		filename = val
 		delete(userHeaders, object.AttributeFileName)
@ -80,26 +80,26 @@ func objectInfoFromMeta(bkt *BucketInfo, meta *object.Object) *ObjectInfo {
 		delete(userHeaders, object.AttributeTimestamp)
 	}

-	mimeType := http.DetectContentType(meta.GetPayload())
+	mimeType := http.DetectContentType(meta.Payload())

 	return &ObjectInfo{
-		id: meta.GetID(),
+		id: meta.ID(),

 		Bucket:      bkt.Name,
 		Name:        filename,
 		Created:     creation,
 		ContentType: mimeType,
 		Headers:     userHeaders,
-		Size:        int64(meta.GetPayloadSize()),
+		Size:        int64(meta.PayloadSize()),
 	}
 }

 func nameFromObject(o *object.Object) (string, string) {
-	var name = o.GetID().String()
+	var name = o.ID().String()

-	for _, attr := range o.GetAttributes() {
-		if attr.GetKey() == object.AttributeFileName {
-			name = attr.GetValue()
+	for _, attr := range o.Attributes() {
+		if attr.Key() == object.AttributeFileName {
+			name = attr.Value()

 			break
 		}
--- a/api/layer/writer.go
+++ b/api/layer/writer.go
@ -12,7 +12,7 @@ type offsetWriter struct {
 	length int64
 }

-func newWriter(w io.Writer, offset, length int64) io.Writer {
+func newWriter(w io.Writer, offset, length int64) *offsetWriter {
 	return &offsetWriter{
 		Writer: w,
 		offset: offset,
--- a/api/layer/writer_test.go
+++ b/api/layer/writer_test.go
@ -33,10 +33,8 @@ func TestOffsetWriter(t *testing.T) {
 			require.NoError(t, err)
 		}

-		wo := wt.(*offsetWriter)
-
-		require.Equal(t, o, wo.skipped)
-		require.Equal(t, l, wo.written)
+		require.Equal(t, o, wt.skipped)
+		require.Equal(t, l, wt.written)
 		require.Equal(t, b[o:o+l], w.Bytes())
 	})

@ -51,10 +49,8 @@ func TestOffsetWriter(t *testing.T) {
 			require.NoError(t, err)
 		}

-		wo := wt.(*offsetWriter)
-
-		require.Equal(t, o, wo.skipped)
-		require.Equal(t, l, wo.written)
+		require.Equal(t, o, wt.skipped)
+		require.Equal(t, l, wt.written)
 		require.Equal(t, b[o:o+l], w.Bytes())
 	})

@ -69,10 +65,8 @@ func TestOffsetWriter(t *testing.T) {
 			require.NoError(t, err)
 		}

-		wo := wt.(*offsetWriter)
-
-		require.Equal(t, o, wo.skipped)
-		require.Equal(t, l, wo.written)
+		require.Equal(t, o, wt.skipped)
+		require.Equal(t, l, wt.written)
 		require.Equal(t, b[o:o+l], w.Bytes())
 	})

@ -87,10 +81,8 @@ func TestOffsetWriter(t *testing.T) {
 			require.NoError(t, err)
 		}

-		wo := wt.(*offsetWriter)
-
-		require.Equal(t, o, wo.skipped)
-		require.Equal(t, s, wo.written)
+		require.Equal(t, o, wt.skipped)
+		require.Equal(t, s, wt.written)
 		require.Equal(t, b, w.Bytes())
 	})

@ -105,10 +97,8 @@ func TestOffsetWriter(t *testing.T) {
 			require.NoError(t, err)
 		}

-		wo := wt.(*offsetWriter)
-
-		require.Equal(t, o, wo.skipped)
-		require.Equal(t, s, wo.written)
+		require.Equal(t, o, wt.skipped)
+		require.Equal(t, s, wt.written)
 		require.Equal(t, b, w.Bytes())
 	})
 }
--- a/api/metrics/api.go
+++ b/api/metrics/api.go
@ -41,11 +41,11 @@ type (
 	}

 	responseWrapper struct {
+		sync.Once
 		http.ResponseWriter

-		statusCode  int
-		headWritten bool
-		startTime   time.Time
+		statusCode int
+		startTime  time.Time
 	}
 )

@ -202,12 +202,10 @@ func (st *HTTPStats) updateStats(api string, w http.ResponseWriter, r *http.Requ

 // WriteHeader - writes http status code
 func (w *responseWrapper) WriteHeader(code int) {
-	if !w.headWritten {
+	w.Do(func() {
 		w.statusCode = code
-		w.headWritten = true
-
 		w.ResponseWriter.WriteHeader(code)
-	}
+	})
 }

 // Flush - Calls the underlying Flush.
--- a/api/pool/pool.go
+++ b/api/pool/pool.go
@ -1,384 +0,0 @@
-package pool
-
-import (
-	"context"
-	"crypto/ecdsa"
-	"math/rand"
-	"sort"
-	"sync"
-	"time"
-
-	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
-	"github.com/pkg/errors"
-	"go.uber.org/atomic"
-	"go.uber.org/zap"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/connectivity"
-	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/keepalive"
-)
-
-type (
-	node struct {
-		index   int32
-		address string
-		weight  uint32
-		usedAt  time.Time
-		conn    *grpc.ClientConn
-	}
-
-	Client interface {
-		Status() error
-		Connection(context.Context) (*grpc.ClientConn, error)
-		Token(context.Context, *grpc.ClientConn) (*token.SessionToken, error)
-	}
-
-	Pool interface {
-		Client
-
-		Close()
-		ReBalance(ctx context.Context)
-	}
-
-	Peer struct {
-		Address string
-		Weight  float64
-	}
-
-	Config struct {
-		keepalive.ClientParameters
-
-		ConnectionTTL  time.Duration
-		ConnectTimeout time.Duration
-		RequestTimeout time.Duration
-
-		Peers []Peer
-
-		GRPCVerbose bool
-		GRPCLogger  grpclog.LoggerV2
-
-		Logger     *zap.Logger
-		PrivateKey *ecdsa.PrivateKey
-	}
-
-	pool struct {
-		log *zap.Logger
-
-		ttl time.Duration
-
-		conTimeout time.Duration
-		reqTimeout time.Duration
-		opts       keepalive.ClientParameters
-
-		currentIdx  *atomic.Int32
-		currentConn *grpc.ClientConn
-
-		ping Pinger
-
-		*sync.Mutex
-		nodes  []*node
-		keys   []uint32
-		conns  map[uint32][]*node
-		tokens map[string]*token.SessionToken
-
-		oid *owner.ID
-		key *ecdsa.PrivateKey
-
-		unhealthy *atomic.Error
-	}
-
-	Pinger interface {
-		Call(context.Context, *grpc.ClientConn) error
-	}
-)
-
-var (
-	errNoConnections        = errors.New("no connections")
-	errBootstrapping        = errors.New("bootstrapping")
-	errEmptyConnection      = errors.New("empty connection")
-	errNoHealthyConnections = errors.New("no active connections")
-)
-
-func New(cfg *Config) (Pool, error) {
-	p := &pool{
-		log:    cfg.Logger,
-		key:    cfg.PrivateKey,
-		Mutex:  new(sync.Mutex),
-		keys:   make([]uint32, 0),
-		nodes:  make([]*node, 0),
-		conns:  make(map[uint32][]*node),
-		tokens: make(map[string]*token.SessionToken),
-
-		currentIdx: atomic.NewInt32(-1),
-
-		ttl: cfg.ConnectionTTL,
-
-		conTimeout: cfg.ConnectTimeout,
-		reqTimeout: cfg.RequestTimeout,
-		opts:       cfg.ClientParameters,
-
-		unhealthy: atomic.NewError(errBootstrapping),
-	}
-
-	p.oid = owner.NewID()
-	wallet, err := owner.NEO3WalletFromPublicKey(&p.key.PublicKey)
-	if err != nil {
-		return nil, err
-	}
-
-	p.oid.SetNeo3Wallet(wallet)
-
-	if cfg.GRPCVerbose {
-		grpclog.SetLoggerV2(cfg.GRPCLogger)
-	}
-
-	seed := time.Now().UnixNano()
-
-	rand.Seed(seed)
-	cfg.Logger.Info("used random seed", zap.Int64("seed", seed))
-
-	if p.ping, err = newV2Ping(cfg.PrivateKey); err != nil {
-		return nil, err
-	}
-
-	for i := range cfg.Peers {
-		if cfg.Peers[i].Address == "" {
-			cfg.Logger.Warn("skip, empty address")
-			break
-		}
-
-		p.nodes = append(p.nodes, &node{
-			index:   int32(i),
-			address: cfg.Peers[i].Address,
-			weight:  uint32(cfg.Peers[i].Weight * 100),
-		})
-
-		cfg.Logger.Info("add new peer",
-			zap.String("address", p.nodes[i].address),
-			zap.Uint32("weight", p.nodes[i].weight))
-	}
-
-	if len(p.nodes) == 0 {
-		return nil, errNoConnections
-	}
-
-	return p, nil
-}
-
-func (p *pool) Status() error {
-	return p.unhealthy.Load()
-}
-
-func (p *pool) Close() {
-	p.Lock()
-	defer p.Unlock()
-
-	for i := range p.nodes {
-		if p.nodes[i] == nil || p.nodes[i].conn == nil {
-			continue
-		}
-
-		p.log.Warn("close connection",
-			zap.String("address", p.nodes[i].address),
-			zap.Error(p.nodes[i].conn.Close()))
-	}
-}
-
-func (p *pool) ReBalance(ctx context.Context) {
-	p.Lock()
-	defer func() {
-		p.Unlock()
-
-		_, err := p.Connection(ctx)
-		p.unhealthy.Store(err)
-	}()
-
-	keys := make(map[uint32]struct{})
-	tokens := make(map[string]*token.SessionToken)
-
-	for i := range p.nodes {
-		var (
-			idx    = -1
-			exists bool
-			err    error
-			start  = time.Now()
-			tkn    *token.SessionToken
-			conn   = p.nodes[i].conn
-			weight = p.nodes[i].weight
-		)
-
-		if err = ctx.Err(); err != nil {
-			p.log.Warn("something went wrong", zap.Error(err))
-			p.unhealthy.Store(err)
-
-			return
-		}
-
-		if conn == nil {
-			p.log.Debug("empty connection, try to connect",
-				zap.String("address", p.nodes[i].address))
-
-			{ // try to connect
-				ctx, cancel := context.WithTimeout(ctx, p.conTimeout)
-				conn, err = grpc.DialContext(ctx, p.nodes[i].address,
-					grpc.WithBlock(),
-					grpc.WithInsecure(),
-					grpc.WithKeepaliveParams(p.opts))
-				cancel()
-			}
-
-			if err != nil || conn == nil {
-				p.log.Warn("skip, could not connect to node",
-					zap.String("address", p.nodes[i].address),
-					zap.Stringer("elapsed", time.Since(start)),
-					zap.Error(err))
-				continue
-			}
-
-			{ // try to prepare token
-				ctx, cancel := context.WithTimeout(ctx, p.reqTimeout)
-				tkn, err = p.prepareToken(ctx, conn)
-				cancel()
-			}
-
-			if err != nil {
-				p.log.Debug("could not prepare session token",
-					zap.String("address", p.nodes[i].address),
-					zap.Error(err))
-				continue
-			}
-
-			tokens[conn.Target()] = tkn
-
-			p.nodes[i].conn = conn
-			p.nodes[i].usedAt = time.Now()
-			p.log.Debug("connected to node", zap.String("address", p.nodes[i].address))
-		} else if tkn, exists = p.tokens[conn.Target()]; exists {
-			// token exists, ignore
-		} else if tkn, err = p.prepareToken(ctx, conn); err != nil {
-			p.log.Error("could not prepare session token",
-				zap.String("address", p.nodes[i].address),
-				zap.Error(err))
-			continue
-		}
-
-		for j := range p.conns[weight] {
-			if p.conns[weight][j] != nil && p.conns[weight][j].conn == conn {
-				idx = j
-				exists = true
-				break
-			}
-		}
-
-		usedAt := time.Since(p.nodes[i].usedAt)
-
-		// if something wrong with connection (bad state, unhealthy or not used a long time), try to close it and remove
-		if err = p.isAlive(ctx, conn); err != nil || usedAt > p.ttl {
-			p.log.Warn("connection not alive",
-				zap.String("address", p.nodes[i].address),
-				zap.Stringer("since", usedAt),
-				zap.Error(err))
-
-			if exists {
-				// remove from connections
-				p.conns[weight] = append(p.conns[weight][:idx], p.conns[weight][idx+1:]...)
-			}
-
-			// remove token
-			delete(tokens, conn.Target())
-
-			if err = conn.Close(); err != nil {
-				p.log.Warn("could not close bad connection",
-					zap.String("address", p.nodes[i].address),
-					zap.Stringer("since", usedAt),
-					zap.Error(err))
-			}
-
-			if p.nodes[i].conn != nil {
-				p.nodes[i].conn = nil
-			}
-			continue
-		}
-
-		keys[weight] = struct{}{}
-
-		p.log.Debug("connection alive",
-			zap.String("address", p.nodes[i].address),
-			zap.Stringer("since", usedAt))
-
-		if !exists {
-			p.conns[weight] = append(p.conns[weight], p.nodes[i])
-		}
-
-		if tkn != nil {
-			tokens[conn.Target()] = tkn
-		}
-	}
-
-	p.tokens = tokens
-	p.keys = p.keys[:0]
-	for w := range keys {
-		p.keys = append(p.keys, w)
-	}
-
-	sort.Slice(p.keys, func(i, j int) bool {
-		return p.keys[i] > p.keys[j]
-	})
-}
-
-func (p *pool) Connection(ctx context.Context) (*grpc.ClientConn, error) {
-	p.Lock()
-	defer p.Unlock()
-
-	if err := p.isAlive(ctx, p.currentConn); err == nil {
-		if id := p.currentIdx.Load(); id != -1 && p.nodes[id] != nil {
-			p.nodes[id].usedAt = time.Now()
-		}
-
-		return p.currentConn, nil
-	}
-
-	for _, w := range p.keys {
-		switch ln := len(p.conns[w]); ln {
-		case 0:
-			continue
-		case 1:
-			p.currentConn = p.conns[w][0].conn
-			p.conns[w][0].usedAt = time.Now()
-			p.currentIdx.Store(p.conns[w][0].index)
-			return p.currentConn, nil
-		default: // > 1
-			i := rand.Intn(ln)
-			p.currentConn = p.conns[w][i].conn
-			p.conns[w][i].usedAt = time.Now()
-			p.currentIdx.Store(p.conns[w][i].index)
-			return p.currentConn, nil
-		}
-	}
-
-	p.currentConn = nil
-	p.currentIdx.Store(-1)
-
-	if ctx.Err() != nil {
-		return nil, ctx.Err()
-	}
-
-	return nil, errNoHealthyConnections
-}
-
-func (p *pool) isAlive(ctx context.Context, cur *grpc.ClientConn) error {
-	if cur == nil {
-		return errEmptyConnection
-	}
-
-	switch st := cur.GetState(); st {
-	case connectivity.Idle, connectivity.Ready, connectivity.Connecting:
-		ctx, cancel := context.WithTimeout(ctx, p.reqTimeout)
-		defer cancel()
-
-		return p.ping.Call(ctx, cur)
-	default:
-		return errors.New(st.String())
-	}
-}
--- a/api/pool/session.go
+++ b/api/pool/session.go
@ -1,52 +0,0 @@
-package pool
-
-import (
-	"context"
-	"math"
-
-	"go.uber.org/zap"
-
-	"github.com/nspcc-dev/neofs-api-go/pkg/client"
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
-	"google.golang.org/grpc"
-)
-
-// SessionToken returns session token for connection
-func (p *pool) Token(ctx context.Context, conn *grpc.ClientConn) (*token.SessionToken, error) {
-	p.Lock()
-	defer p.Unlock()
-
-	if tkn, ok := p.tokens[conn.Target()]; ok && tkn != nil {
-		return tkn, nil
-	}
-
-	// prepare session token
-	tkn, err := p.prepareToken(ctx, conn)
-	if err != nil {
-		return nil, err
-	}
-
-	// save token for current connection
-	p.tokens[conn.Target()] = tkn
-
-	return tkn, nil
-}
-
-// creates token using
-func (p *pool) prepareToken(ctx context.Context, conn *grpc.ClientConn) (*token.SessionToken, error) {
-	cli, err := client.New(p.key, client.WithGRPCConnection(conn))
-	if err != nil {
-		return nil, err
-	}
-
-	tkn, err := cli.CreateSession(ctx, math.MaxUint64)
-	if err != nil {
-		return nil, err
-	}
-
-	p.log.Info("token created for connection",
-		zap.String("address", conn.Target()),
-		zap.Stringer("owner", tkn.OwnerID()))
-
-	return tkn, err
-}
--- a/api/pool/v2.go
+++ b/api/pool/v2.go
@ -1,36 +0,0 @@
-package pool
-
-import (
-	"context"
-	"crypto/ecdsa"
-
-	"github.com/nspcc-dev/neofs-api-go/v2/client"
-	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
-	"github.com/nspcc-dev/neofs-api-go/v2/signature"
-	"github.com/pkg/errors"
-	"google.golang.org/grpc"
-)
-
-type v2Ping struct {
-	req *netmap.LocalNodeInfoRequest
-}
-
-func newV2Ping(key *ecdsa.PrivateKey) (Pinger, error) {
-	req := new(netmap.LocalNodeInfoRequest)
-
-	if err := signature.SignServiceMessage(key, req); err != nil {
-		return nil, errors.Wrap(err, "could not sign `PingRequest`")
-	}
-
-	return &v2Ping{req: req}, nil
-}
-
-func (v *v2Ping) Call(ctx context.Context, conn *grpc.ClientConn) error {
-	if cli, err := netmap.NewClient(netmap.WithGlobalOpts(client.WithGRPCConn(conn))); err != nil {
-		return err
-	} else if _, err := cli.LocalNodeInfo(ctx, v.req); err != nil {
-		return err
-	}
-
-	return nil
-}
--- a/api/router.go
+++ b/api/router.go
@ -3,11 +3,12 @@ package api
 import (
 	"context"
 	"net/http"
+	"sync"

 	"github.com/google/uuid"
 	"github.com/gorilla/mux"
+	"github.com/nspcc-dev/neofs-s3-gate/api/auth"
 	"github.com/nspcc-dev/neofs-s3-gate/api/metrics"
-	"github.com/nspcc-dev/neofs-s3-gate/auth"
 	"go.uber.org/zap"
 	"google.golang.org/grpc/metadata"
 )
@ -81,7 +82,9 @@ type (
 	mimeType string

 	logResponseWriter struct {
+		sync.Once
 		http.ResponseWriter
+
 		statusCode int
 	}
 )
@ -100,8 +103,10 @@ const (
 var _ = logErrorResponse

 func (lrw *logResponseWriter) WriteHeader(code int) {
-	lrw.statusCode = code
-	lrw.ResponseWriter.WriteHeader(code)
+	lrw.Do(func() {
+		lrw.statusCode = code
+		lrw.ResponseWriter.WriteHeader(code)
+	})
 }

 func setRequestID(h http.Handler) http.Handler {
@ -139,12 +144,14 @@ func logErrorResponse(l *zap.Logger) mux.MiddlewareFunc {
 					zap.Int("status", lw.statusCode),
 					zap.String("method", mux.CurrentRoute(r).GetName()),
 					zap.String("description", http.StatusText(lw.statusCode)))
-			} else {
-				l.Info("call method",
-					zap.Int("status", lw.statusCode),
-					zap.String("method", mux.CurrentRoute(r).GetName()),
-					zap.String("description", http.StatusText(lw.statusCode)))
+
+				return
 			}
+
+			l.Info("call method",
+				zap.Int("status", lw.statusCode),
+				zap.String("method", mux.CurrentRoute(r).GetName()),
+				zap.String("description", http.StatusText(lw.statusCode)))
 		})
 	}
 }
@ -160,7 +167,7 @@ func GetRequestID(v interface{}) string {
 	}
 }

-func Attach(r *mux.Router, m MaxClients, h Handler, center *auth.Center, log *zap.Logger) {
+func Attach(r *mux.Router, domains []string, m MaxClients, h Handler, center auth.Center, log *zap.Logger) {
 	api := r.PathPrefix(SlashSeparator).Subrouter()

 	api.Use(
@ -174,258 +181,264 @@ func Attach(r *mux.Router, m MaxClients, h Handler, center *auth.Center, log *za
 	// Attach user authentication for all S3 routes.
 	AttachUserAuth(api, center, log)

-	bucket := api.PathPrefix("/{bucket}").Subrouter()
+	buckets := make([]*mux.Router, 0, len(domains)+1)
+	buckets = append(buckets, api.PathPrefix("/{bucket}").Subrouter())

-	// Object operations
-	// HeadObject
-	bucket.Methods(http.MethodHead).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("headobject", h.HeadObjectHandler))).Name("HeadObject")
-	// CopyObjectPart
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HeadersRegexp(hdrAmzCopySource, ".*?(\\/|%2F).*?").HandlerFunc(m.Handle(metrics.APIStats("copyobjectpart", h.CopyObjectPartHandler))).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}").
-		Name("CopyObjectPart")
-	// PutObjectPart
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("putobjectpart", h.PutObjectPartHandler))).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}").
-		Name("PutObjectObject")
-	// ListObjectParts
-	bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("listobjectparts", h.ListObjectPartsHandler))).Queries("uploadId", "{uploadId:.*}").
-		Name("ListObjectParts")
-	// CompleteMultipartUpload
-	bucket.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("completemutipartupload", h.CompleteMultipartUploadHandler))).Queries("uploadId", "{uploadId:.*}").
-		Name("CompleteMultipartUpload")
-	// NewMultipartUpload
-	bucket.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("newmultipartupload", h.NewMultipartUploadHandler))).Queries("uploads", "").
-		Name("NewMultipartUpload")
-	// AbortMultipartUpload
-	bucket.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("abortmultipartupload", h.AbortMultipartUploadHandler))).Queries("uploadId", "{uploadId:.*}").
-		Name("AbortMultipartUpload")
-	// GetObjectACL - this is a dummy call.
-	bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("getobjectacl", h.GetObjectACLHandler))).Queries("acl", "").
-		Name("GetObjectACL")
-	// PutObjectACL - this is a dummy call.
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("putobjectacl", h.PutObjectACLHandler))).Queries("acl", "").
-		Name("PutObjectACL")
-	// GetObjectTagging
-	bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("getobjecttagging", h.GetObjectTaggingHandler))).Queries("tagging", "").
-		Name("GetObjectTagging")
-	// PutObjectTagging
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("putobjecttagging", h.PutObjectTaggingHandler))).Queries("tagging", "").
-		Name("PutObjectTagging")
-	// DeleteObjectTagging
-	bucket.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("deleteobjecttagging", h.DeleteObjectTaggingHandler))).Queries("tagging", "").
-		Name("DeleteObjectTagging")
-	// SelectObjectContent
-	bucket.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("selectobjectcontent", h.SelectObjectContentHandler))).Queries("select", "").Queries("select-type", "2").
-		Name("SelectObjectContent")
-	// GetObjectRetention
-	bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("getobjectretention", h.GetObjectRetentionHandler))).Queries("retention", "").
-		Name("GetObjectRetention")
-	// GetObjectLegalHold
-	bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("getobjectlegalhold", h.GetObjectLegalHoldHandler))).Queries("legal-hold", "").
-		Name("GetObjectLegalHold")
-	// GetObject
-	bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("getobject", h.GetObjectHandler))).
-		Name("GetObject")
-	// CopyObject
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HeadersRegexp(hdrAmzCopySource, ".*?(\\/|%2F).*?").HandlerFunc(m.Handle(metrics.APIStats("copyobject", h.CopyObjectHandler))).
-		Name("CopyObject")
-	// PutObjectRetention
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("putobjectretention", h.PutObjectRetentionHandler))).Queries("retention", "").
-		Name("PutObjectRetention")
-	// PutObjectLegalHold
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("putobjectlegalhold", h.PutObjectLegalHoldHandler))).Queries("legal-hold", "").
-		Name("PutObjectLegalHold")
+	for _, domain := range domains {
+		buckets = append(buckets, api.Host("{bucket:.+}."+domain).Subrouter())
+	}

-	// PutObject
-	bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("putobject", h.PutObjectHandler))).
-		Name("PutObject")
-	// DeleteObject
-	bucket.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
-		m.Handle(metrics.APIStats("deleteobject", h.DeleteObjectHandler))).
-		Name("DeleteObject")
+	for _, bucket := range buckets {
+		// Object operations
+		// HeadObject
+		bucket.Methods(http.MethodHead).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("headobject", h.HeadObjectHandler))).Name("HeadObject")
+		// CopyObjectPart
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HeadersRegexp(hdrAmzCopySource, ".*?(\\/|%2F).*?").HandlerFunc(m.Handle(metrics.APIStats("copyobjectpart", h.CopyObjectPartHandler))).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}").
+			Name("CopyObjectPart")
+		// PutObjectPart
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("putobjectpart", h.PutObjectPartHandler))).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}").
+			Name("PutObjectObject")
+		// ListObjectParts
+		bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("listobjectparts", h.ListObjectPartsHandler))).Queries("uploadId", "{uploadId:.*}").
+			Name("ListObjectParts")
+		// CompleteMultipartUpload
+		bucket.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("completemutipartupload", h.CompleteMultipartUploadHandler))).Queries("uploadId", "{uploadId:.*}").
+			Name("CompleteMultipartUpload")
+		// NewMultipartUpload
+		bucket.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("newmultipartupload", h.NewMultipartUploadHandler))).Queries("uploads", "").
+			Name("NewMultipartUpload")
+		// AbortMultipartUpload
+		bucket.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("abortmultipartupload", h.AbortMultipartUploadHandler))).Queries("uploadId", "{uploadId:.*}").
+			Name("AbortMultipartUpload")
+		// GetObjectACL - this is a dummy call.
+		bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("getobjectacl", h.GetObjectACLHandler))).Queries("acl", "").
+			Name("GetObjectACL")
+		// PutObjectACL - this is a dummy call.
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("putobjectacl", h.PutObjectACLHandler))).Queries("acl", "").
+			Name("PutObjectACL")
+		// GetObjectTagging
+		bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("getobjecttagging", h.GetObjectTaggingHandler))).Queries("tagging", "").
+			Name("GetObjectTagging")
+		// PutObjectTagging
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("putobjecttagging", h.PutObjectTaggingHandler))).Queries("tagging", "").
+			Name("PutObjectTagging")
+		// DeleteObjectTagging
+		bucket.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("deleteobjecttagging", h.DeleteObjectTaggingHandler))).Queries("tagging", "").
+			Name("DeleteObjectTagging")
+		// SelectObjectContent
+		bucket.Methods(http.MethodPost).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("selectobjectcontent", h.SelectObjectContentHandler))).Queries("select", "").Queries("select-type", "2").
+			Name("SelectObjectContent")
+		// GetObjectRetention
+		bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("getobjectretention", h.GetObjectRetentionHandler))).Queries("retention", "").
+			Name("GetObjectRetention")
+		// GetObjectLegalHold
+		bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("getobjectlegalhold", h.GetObjectLegalHoldHandler))).Queries("legal-hold", "").
+			Name("GetObjectLegalHold")
+		// GetObject
+		bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("getobject", h.GetObjectHandler))).
+			Name("GetObject")
+		// CopyObject
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HeadersRegexp(hdrAmzCopySource, ".*?(\\/|%2F).*?").HandlerFunc(m.Handle(metrics.APIStats("copyobject", h.CopyObjectHandler))).
+			Name("CopyObject")
+		// PutObjectRetention
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("putobjectretention", h.PutObjectRetentionHandler))).Queries("retention", "").
+			Name("PutObjectRetention")
+		// PutObjectLegalHold
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("putobjectlegalhold", h.PutObjectLegalHoldHandler))).Queries("legal-hold", "").
+			Name("PutObjectLegalHold")

-	// Bucket operations
-	// GetBucketLocation
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketlocation", h.GetBucketLocationHandler))).Queries("location", "").
-		Name("GetBucketLocation")
-	// GetBucketPolicy
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketpolicy", h.GetBucketPolicyHandler))).Queries("policy", "").
-		Name("GetBucketPolicy")
-	// GetBucketLifecycle
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketlifecycle", h.GetBucketLifecycleHandler))).Queries("lifecycle", "").
-		Name("GetBucketLifecycle")
-	// GetBucketEncryption
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketencryption", h.GetBucketEncryptionHandler))).Queries("encryption", "").
-		Name("GetBucketEncryption")
+		// PutObject
+		bucket.Methods(http.MethodPut).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("putobject", h.PutObjectHandler))).
+			Name("PutObject")
+		// DeleteObject
+		bucket.Methods(http.MethodDelete).Path("/{object:.+}").HandlerFunc(
+			m.Handle(metrics.APIStats("deleteobject", h.DeleteObjectHandler))).
+			Name("DeleteObject")

-	// Dummy Bucket Calls
-	// GetBucketACL -- this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketacl", h.GetBucketACLHandler))).Queries("acl", "").
-		Name("GetBucketACL")
-	// PutBucketACL -- this is a dummy call.
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketacl", h.PutBucketACLHandler))).Queries("acl", "").
-		Name("PutBucketACL")
-	// GetBucketCors - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketcors", h.GetBucketCorsHandler))).Queries("cors", "").
-		Name("GetBucketCors")
-	// GetBucketWebsiteHandler - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketwebsite", h.GetBucketWebsiteHandler))).Queries("website", "").
-		Name("GetBucketWebsite")
-	// GetBucketAccelerateHandler - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketaccelerate", h.GetBucketAccelerateHandler))).Queries("accelerate", "").
-		Name("GetBucketAccelerate")
-	// GetBucketRequestPaymentHandler - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketrequestpayment", h.GetBucketRequestPaymentHandler))).Queries("requestPayment", "").
-		Name("GetBucketRequestPayment")
-	// GetBucketLoggingHandler - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketlogging", h.GetBucketLoggingHandler))).Queries("logging", "").
-		Name("GetBucketLogging")
-	// GetBucketLifecycleHandler - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketlifecycle", h.GetBucketLifecycleHandler))).Queries("lifecycle", "").
-		Name("GetBucketLifecycle")
-	// GetBucketReplicationHandler - this is a dummy call.
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketreplication", h.GetBucketReplicationHandler))).Queries("replication", "").
-		Name("GetBucketReplication")
-	// GetBucketTaggingHandler
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbuckettagging", h.GetBucketTaggingHandler))).Queries("tagging", "").
-		Name("GetBucketTagging")
-	// DeleteBucketWebsiteHandler
-	bucket.Methods(http.MethodDelete).HandlerFunc(
-		m.Handle(metrics.APIStats("deletebucketwebsite", h.DeleteBucketWebsiteHandler))).Queries("website", "").
-		Name("DeleteBucketWebsite")
-	// DeleteBucketTaggingHandler
-	bucket.Methods(http.MethodDelete).HandlerFunc(
-		m.Handle(metrics.APIStats("deletebuckettagging", h.DeleteBucketTaggingHandler))).Queries("tagging", "").
-		Name("DeleteBucketTagging")
+		// Bucket operations
+		// GetBucketLocation
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketlocation", h.GetBucketLocationHandler))).Queries("location", "").
+			Name("GetBucketLocation")
+		// GetBucketPolicy
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketpolicy", h.GetBucketPolicyHandler))).Queries("policy", "").
+			Name("GetBucketPolicy")
+		// GetBucketLifecycle
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketlifecycle", h.GetBucketLifecycleHandler))).Queries("lifecycle", "").
+			Name("GetBucketLifecycle")
+		// GetBucketEncryption
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketencryption", h.GetBucketEncryptionHandler))).Queries("encryption", "").
+			Name("GetBucketEncryption")

-	// GetBucketObjectLockConfig
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketobjectlockconfiguration", h.GetBucketObjectLockConfigHandler))).Queries("object-lock", "").
-		Name("GetBucketObjectLockConfig")
-	// GetBucketVersioning
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketversioning", h.GetBucketVersioningHandler))).Queries("versioning", "").
-		Name("GetBucketVersioning")
-	// GetBucketNotification
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("getbucketnotification", h.GetBucketNotificationHandler))).Queries("notification", "").
-		Name("GetBucketNotification")
-	// ListenBucketNotification
-	bucket.Methods(http.MethodGet).HandlerFunc(metrics.APIStats("listenbucketnotification", h.ListenBucketNotificationHandler)).Queries("events", "{events:.*}").
-		Name("ListenBucketNotification")
-	// ListMultipartUploads
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("listmultipartuploads", h.ListMultipartUploadsHandler))).Queries("uploads", "").
-		Name("ListMultipartUploads")
-	// ListObjectsV2M
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("listobjectsv2M", h.ListObjectsV2MHandler))).Queries("list-type", "2", "metadata", "true").
-		Name("ListObjectsV2M")
-	// ListObjectsV2
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("listobjectsv2", h.ListObjectsV2Handler))).Queries("list-type", "2").
-		Name("ListObjectsV2")
-	// ListBucketVersions
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("listbucketversions", h.ListBucketObjectVersionsHandler))).Queries("versions", "").
-		Name("ListBucketVersions")
-	// ListObjectsV1 (Legacy)
-	bucket.Methods(http.MethodGet).HandlerFunc(
-		m.Handle(metrics.APIStats("listobjectsv1", h.ListObjectsV1Handler))).
-		Name("ListObjectsV1")
-	// PutBucketLifecycle
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketlifecycle", h.PutBucketLifecycleHandler))).Queries("lifecycle", "").
-		Name("PutBucketLifecycle")
-	// PutBucketEncryption
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketencryption", h.PutBucketEncryptionHandler))).Queries("encryption", "").
-		Name("PutBucketEncryption")
+		// Dummy Bucket Calls
+		// GetBucketACL -- this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketacl", h.GetBucketACLHandler))).Queries("acl", "").
+			Name("GetBucketACL")
+		// PutBucketACL -- this is a dummy call.
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketacl", h.PutBucketACLHandler))).Queries("acl", "").
+			Name("PutBucketACL")
+		// GetBucketCors - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketcors", h.GetBucketCorsHandler))).Queries("cors", "").
+			Name("GetBucketCors")
+		// GetBucketWebsiteHandler - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketwebsite", h.GetBucketWebsiteHandler))).Queries("website", "").
+			Name("GetBucketWebsite")
+		// GetBucketAccelerateHandler - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketaccelerate", h.GetBucketAccelerateHandler))).Queries("accelerate", "").
+			Name("GetBucketAccelerate")
+		// GetBucketRequestPaymentHandler - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketrequestpayment", h.GetBucketRequestPaymentHandler))).Queries("requestPayment", "").
+			Name("GetBucketRequestPayment")
+		// GetBucketLoggingHandler - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketlogging", h.GetBucketLoggingHandler))).Queries("logging", "").
+			Name("GetBucketLogging")
+		// GetBucketLifecycleHandler - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketlifecycle", h.GetBucketLifecycleHandler))).Queries("lifecycle", "").
+			Name("GetBucketLifecycle")
+		// GetBucketReplicationHandler - this is a dummy call.
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketreplication", h.GetBucketReplicationHandler))).Queries("replication", "").
+			Name("GetBucketReplication")
+		// GetBucketTaggingHandler
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbuckettagging", h.GetBucketTaggingHandler))).Queries("tagging", "").
+			Name("GetBucketTagging")
+		// DeleteBucketWebsiteHandler
+		bucket.Methods(http.MethodDelete).HandlerFunc(
+			m.Handle(metrics.APIStats("deletebucketwebsite", h.DeleteBucketWebsiteHandler))).Queries("website", "").
+			Name("DeleteBucketWebsite")
+		// DeleteBucketTaggingHandler
+		bucket.Methods(http.MethodDelete).HandlerFunc(
+			m.Handle(metrics.APIStats("deletebuckettagging", h.DeleteBucketTaggingHandler))).Queries("tagging", "").
+			Name("DeleteBucketTagging")

-	// PutBucketPolicy
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketpolicy", h.PutBucketPolicyHandler))).Queries("policy", "").
-		Name("PutBucketPolicy")
+		// GetBucketObjectLockConfig
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketobjectlockconfiguration", h.GetBucketObjectLockConfigHandler))).Queries("object-lock", "").
+			Name("GetBucketObjectLockConfig")
+		// GetBucketVersioning
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketversioning", h.GetBucketVersioningHandler))).Queries("versioning", "").
+			Name("GetBucketVersioning")
+		// GetBucketNotification
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("getbucketnotification", h.GetBucketNotificationHandler))).Queries("notification", "").
+			Name("GetBucketNotification")
+		// ListenBucketNotification
+		bucket.Methods(http.MethodGet).HandlerFunc(metrics.APIStats("listenbucketnotification", h.ListenBucketNotificationHandler)).Queries("events", "{events:.*}").
+			Name("ListenBucketNotification")
+		// ListMultipartUploads
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("listmultipartuploads", h.ListMultipartUploadsHandler))).Queries("uploads", "").
+			Name("ListMultipartUploads")
+		// ListObjectsV2M
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("listobjectsv2M", h.ListObjectsV2MHandler))).Queries("list-type", "2", "metadata", "true").
+			Name("ListObjectsV2M")
+		// ListObjectsV2
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("listobjectsv2", h.ListObjectsV2Handler))).Queries("list-type", "2").
+			Name("ListObjectsV2")
+		// ListBucketVersions
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("listbucketversions", h.ListBucketObjectVersionsHandler))).Queries("versions", "").
+			Name("ListBucketVersions")
+		// ListObjectsV1 (Legacy)
+		bucket.Methods(http.MethodGet).HandlerFunc(
+			m.Handle(metrics.APIStats("listobjectsv1", h.ListObjectsV1Handler))).
+			Name("ListObjectsV1")
+		// PutBucketLifecycle
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketlifecycle", h.PutBucketLifecycleHandler))).Queries("lifecycle", "").
+			Name("PutBucketLifecycle")
+		// PutBucketEncryption
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketencryption", h.PutBucketEncryptionHandler))).Queries("encryption", "").
+			Name("PutBucketEncryption")

-	// PutBucketObjectLockConfig
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketobjectlockconfig", h.PutBucketObjectLockConfigHandler))).Queries("object-lock", "").
-		Name("PutBucketObjectLockConfig")
-	// PutBucketTaggingHandler
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbuckettagging", h.PutBucketTaggingHandler))).Queries("tagging", "").
-		Name("PutBucketTagging")
-	// PutBucketVersioning
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketversioning", h.PutBucketVersioningHandler))).Queries("versioning", "").
-		Name("PutBucketVersioning")
-	// PutBucketNotification
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucketnotification", h.PutBucketNotificationHandler))).Queries("notification", "").
-		Name("PutBucketNotification")
-	// PutBucket
-	bucket.Methods(http.MethodPut).HandlerFunc(
-		m.Handle(metrics.APIStats("putbucket", h.PutBucketHandler))).
-		Name("PutBucket")
-	// HeadBucket
-	bucket.Methods(http.MethodHead).HandlerFunc(
-		m.Handle(metrics.APIStats("headbucket", h.HeadBucketHandler))).
-		Name("HeadBucket")
-	// PostPolicy
-	bucket.Methods(http.MethodPost).HeadersRegexp(hdrContentType, "multipart/form-data*").HandlerFunc(
-		m.Handle(metrics.APIStats("postpolicybucket", h.PostPolicyBucketHandler))).
-		Name("PostPolicyBucket")
-	// DeleteMultipleObjects
-	bucket.Methods(http.MethodPost).HandlerFunc(
-		m.Handle(metrics.APIStats("deletemultipleobjects", h.DeleteMultipleObjectsHandler))).Queries("delete", "").
-		Name("DeleteMultipleObjects")
-	// DeleteBucketPolicy
-	bucket.Methods(http.MethodDelete).HandlerFunc(
-		m.Handle(metrics.APIStats("deletebucketpolicy", h.DeleteBucketPolicyHandler))).Queries("policy", "").
-		Name("DeleteBucketPolicy")
-	// DeleteBucketLifecycle
-	bucket.Methods(http.MethodDelete).HandlerFunc(
-		m.Handle(metrics.APIStats("deletebucketlifecycle", h.DeleteBucketLifecycleHandler))).Queries("lifecycle", "").
-		Name("DeleteBucketLifecycle")
-	// DeleteBucketEncryption
-	bucket.Methods(http.MethodDelete).HandlerFunc(
-		m.Handle(metrics.APIStats("deletebucketencryption", h.DeleteBucketEncryptionHandler))).Queries("encryption", "").
-		Name("DeleteBucketEncryption")
-	// DeleteBucket
-	bucket.Methods(http.MethodDelete).HandlerFunc(
-		m.Handle(metrics.APIStats("deletebucket", h.DeleteBucketHandler))).
-		Name("DeleteBucket")
+		// PutBucketPolicy
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketpolicy", h.PutBucketPolicyHandler))).Queries("policy", "").
+			Name("PutBucketPolicy")

+		// PutBucketObjectLockConfig
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketobjectlockconfig", h.PutBucketObjectLockConfigHandler))).Queries("object-lock", "").
+			Name("PutBucketObjectLockConfig")
+		// PutBucketTaggingHandler
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbuckettagging", h.PutBucketTaggingHandler))).Queries("tagging", "").
+			Name("PutBucketTagging")
+		// PutBucketVersioning
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketversioning", h.PutBucketVersioningHandler))).Queries("versioning", "").
+			Name("PutBucketVersioning")
+		// PutBucketNotification
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucketnotification", h.PutBucketNotificationHandler))).Queries("notification", "").
+			Name("PutBucketNotification")
+		// PutBucket
+		bucket.Methods(http.MethodPut).HandlerFunc(
+			m.Handle(metrics.APIStats("putbucket", h.PutBucketHandler))).
+			Name("PutBucket")
+		// HeadBucket
+		bucket.Methods(http.MethodHead).HandlerFunc(
+			m.Handle(metrics.APIStats("headbucket", h.HeadBucketHandler))).
+			Name("HeadBucket")
+		// PostPolicy
+		bucket.Methods(http.MethodPost).HeadersRegexp(hdrContentType, "multipart/form-data*").HandlerFunc(
+			m.Handle(metrics.APIStats("postpolicybucket", h.PostPolicyBucketHandler))).
+			Name("PostPolicyBucket")
+		// DeleteMultipleObjects
+		bucket.Methods(http.MethodPost).HandlerFunc(
+			m.Handle(metrics.APIStats("deletemultipleobjects", h.DeleteMultipleObjectsHandler))).Queries("delete", "").
+			Name("DeleteMultipleObjects")
+		// DeleteBucketPolicy
+		bucket.Methods(http.MethodDelete).HandlerFunc(
+			m.Handle(metrics.APIStats("deletebucketpolicy", h.DeleteBucketPolicyHandler))).Queries("policy", "").
+			Name("DeleteBucketPolicy")
+		// DeleteBucketLifecycle
+		bucket.Methods(http.MethodDelete).HandlerFunc(
+			m.Handle(metrics.APIStats("deletebucketlifecycle", h.DeleteBucketLifecycleHandler))).Queries("lifecycle", "").
+			Name("DeleteBucketLifecycle")
+		// DeleteBucketEncryption
+		bucket.Methods(http.MethodDelete).HandlerFunc(
+			m.Handle(metrics.APIStats("deletebucketencryption", h.DeleteBucketEncryptionHandler))).Queries("encryption", "").
+			Name("DeleteBucketEncryption")
+		// DeleteBucket
+		bucket.Methods(http.MethodDelete).HandlerFunc(
+			m.Handle(metrics.APIStats("deletebucket", h.DeleteBucketHandler))).
+			Name("DeleteBucket")
+	}
 	// Root operation

 	// ListBuckets
--- a/api/user-auth.go
+++ b/api/user-auth.go
@ -4,22 +4,24 @@ import (
 	"net/http"

 	"github.com/gorilla/mux"
-	"github.com/nspcc-dev/neofs-s3-gate/auth"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
+	"github.com/nspcc-dev/neofs-s3-gate/api/auth"
 	"go.uber.org/zap"
 )

-func AttachUserAuth(router *mux.Router, center *auth.Center, log *zap.Logger) {
-	uamw := func(h http.Handler) http.Handler {
+func AttachUserAuth(router *mux.Router, center auth.Center, log *zap.Logger) {
+	router.Use(func(h http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			bearerToken, err := center.AuthenticationPassed(r)
+			token, err := center.Authenticate(r)
 			if err != nil {
 				log.Error("failed to pass authentication", zap.Error(err))
 				WriteErrorResponse(r.Context(), w, GetAPIError(ErrAccessDenied), r.URL)
 				return
 			}
-			h.ServeHTTP(w, r.WithContext(auth.SetBearerToken(r.Context(), bearerToken)))
+
+			h.ServeHTTP(w, r.WithContext(
+				sdk.SetBearerToken(r.Context(), token)))

 		})
-	}
-	router.Use(uamw)
+	})
 }
--- a/auth/bearer-token.go
+++ b/auth/bearer-token.go
@ -1,30 +0,0 @@
-package auth
-
-import (
-	"context"
-
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
-	"github.com/pkg/errors"
-)
-
-type contextKey string
-
-const bearerTokenContextKey contextKey = "bearer-token"
-
-// GetBearerToken returns a bearer token embedded into a context or error, if any.
-func GetBearerToken(ctx context.Context) (*token.BearerToken, error) {
-	bt := ctx.Value(bearerTokenContextKey)
-	if bt == nil {
-		return nil, errors.New("got nil bearer token")
-	}
-	v, ok := bt.(*token.BearerToken)
-	if !ok {
-		return nil, errors.Errorf("extracted unexpected type other than bearer token's: %T", v)
-	}
-	return v, nil
-}
-
-// SetBearerToken return a context with embedded bearer token.
-func SetBearerToken(ctx context.Context, bearerToken *token.BearerToken) context.Context {
-	return context.WithValue(ctx, bearerTokenContextKey, bearerToken)
-}
--- a/auth/center.go
+++ b/auth/center.go
@ -1,127 +0,0 @@
-package auth
-
-import (
-	"bytes"
-	"context"
-	"crypto/ecdsa"
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"regexp"
-	"strings"
-	"time"
-
-	"github.com/aws/aws-sdk-go/aws/credentials"
-	v4 "github.com/aws/aws-sdk-go/aws/signer/v4"
-	"github.com/nspcc-dev/neofs-api-go/pkg/token"
-	"github.com/nspcc-dev/neofs-authmate/accessbox/hcs"
-	"github.com/nspcc-dev/neofs-authmate/agents/s3"
-	manager "github.com/nspcc-dev/neofs-authmate/manager/neofs"
-	"github.com/pkg/errors"
-	"go.uber.org/zap"
-)
-
-var authorizationFieldRegexp = regexp.MustCompile(`AWS4-HMAC-SHA256 Credential=(?P<access_key_id_cid>[^/]+)/(?P<access_key_id_oid>[^/]+)/(?P<date>[^/]+)/(?P<region>[^/]*)/(?P<service>[^/]+)/aws4_request,\s*SignedHeaders=(?P<signed_header_fields>.+),\s*Signature=(?P<v4_signature>.+)`)
-
-type (
-	Center struct {
-		man *manager.Manager
-		reg *regexpSubmatcher
-
-		keys *hcs.X25519Keys
-	}
-
-	Params struct {
-		Timeout time.Duration
-
-		Log *zap.Logger
-		Con manager.Connector
-
-		GAKey *hcs.X25519Keys
-		NFKey *ecdsa.PrivateKey
-	}
-)
-
-// New creates an instance of AuthCenter.
-func New(ctx context.Context, p *Params) (*Center, error) {
-	m, err := manager.New(ctx,
-		manager.WithKey(p.NFKey),
-		manager.WithLogger(p.Log),
-		manager.WithConnector(p.Con))
-
-	if err != nil {
-		return nil, err
-	}
-	return &Center{
-		man: m,
-		reg: &regexpSubmatcher{re: authorizationFieldRegexp},
-
-		keys: p.GAKey,
-	}, nil
-}
-
-func (center *Center) AuthenticationPassed(request *http.Request) (*token.BearerToken, error) {
-	queryValues := request.URL.Query()
-	if queryValues.Get("X-Amz-Algorithm") == "AWS4-HMAC-SHA256" {
-		return nil, errors.New("pre-signed form of request is not supported")
-	}
-	authHeaderField := request.Header["Authorization"]
-	if len(authHeaderField) != 1 {
-		return nil, errors.New("unsupported request: wrong length of Authorization header field")
-	}
-	sms1 := center.reg.getSubmatches(authHeaderField[0])
-	if len(sms1) != 7 {
-		return nil, errors.New("bad Authorization header field")
-	}
-	signedHeaderFieldsNames := strings.Split(sms1["signed_header_fields"], ";")
-	if len(signedHeaderFieldsNames) == 0 {
-		return nil, errors.New("wrong format of signed headers part")
-	}
-	signatureDateTime, err := time.Parse("20060102T150405Z", request.Header.Get("X-Amz-Date"))
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to parse x-amz-date header field")
-	}
-	accessKeyID := fmt.Sprintf("%s/%s", sms1["access_key_id_cid"], sms1["access_key_id_oid"])
-	res, err := s3.NewAgent(center.man).ObtainSecret(request.Context(), center.keys, accessKeyID)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to fetch bearer token")
-	}
-	otherRequest := request.Clone(context.TODO())
-	otherRequest.Header = map[string][]string{}
-	for hfn, hfvs := range request.Header {
-		for _, shfn := range signedHeaderFieldsNames {
-			if strings.EqualFold(hfn, shfn) {
-				otherRequest.Header[hfn] = hfvs
-			}
-		}
-	}
-	awsCreds := credentials.NewStaticCredentials(accessKeyID, res.SecretAccessKey, "")
-	signer := v4.NewSigner(awsCreds)
-	body, err := readAndKeepBody(request)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to read out request body")
-	}
-	_, err = signer.Sign(otherRequest, body, sms1["service"], sms1["region"], signatureDateTime)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to sign temporary HTTP request")
-	}
-	sms2 := center.reg.getSubmatches(otherRequest.Header.Get("Authorization"))
-	if sms1["v4_signature"] != sms2["v4_signature"] {
-		return nil, errors.Wrap(err, "failed to pass authentication procedure")
-	}
-	return res.BearerToken, nil
-}
-
-// TODO: Make this write into a smart buffer backed by a file on a fast drive.
-func readAndKeepBody(request *http.Request) (*bytes.Reader, error) {
-	if request.Body == nil {
-		var r bytes.Reader
-		return &r, nil
-	}
-	payload, err := ioutil.ReadAll(request.Body)
-	if err != nil {
-		return nil, err
-	}
-	request.Body = ioutil.NopCloser(bytes.NewReader(payload))
-	return bytes.NewReader(payload), nil
-}
--- a/auth/regexp-utils.go
+++ b/auth/regexp-utils.go
@ -1,19 +0,0 @@
-package auth
-
-import "regexp"
-
-type regexpSubmatcher struct {
-	re *regexp.Regexp
-}
-
-func (resm *regexpSubmatcher) getSubmatches(target string) map[string]string {
-	matches := resm.re.FindStringSubmatch(target)
-	l := len(matches)
-	submatches := make(map[string]string, l)
-	for i, name := range resm.re.SubexpNames() {
-		if i > 0 && i <= l {
-			submatches[name] = matches[i]
-		}
-	}
-	return submatches
-}
--- a/cmd/gate/app-graceful.go
+++ b/cmd/gate/app-graceful.go
@ -1,24 +0,0 @@
-package main
-
-import (
-	"context"
-	"os"
-	"os/signal"
-	"syscall"
-
-	"go.uber.org/zap"
-)
-
-// newGracefulContext returns graceful context
-func newGracefulContext(l *zap.Logger) context.Context {
-	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		ch := make(chan os.Signal, 1)
-		signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
-		sig := <-ch
-		l.Info("received signal",
-			zap.String("signal", sig.String()))
-		cancel()
-	}()
-	return ctx
-}
--- a/cmd/gate/app-logger.go
+++ b/cmd/gate/app-logger.go
@ -1,142 +0,0 @@
-package main
-
-import (
-	"strings"
-
-	"github.com/spf13/viper"
-	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
-	"google.golang.org/grpc/grpclog"
-)
-
-type (
-	zapLogger struct {
-		zapcore.Core
-		log *zap.SugaredLogger
-	}
-
-	logger interface {
-		grpclog.LoggerV2
-		Println(v ...interface{})
-	}
-)
-
-const (
-	formatJSON    = "json"
-	formatConsole = "console"
-
-	defaultSamplingInitial    = 100
-	defaultSamplingThereafter = 100
-)
-
-func gRPCLogger(l *zap.Logger) logger {
-	log := l.WithOptions(
-		// skip gRPCLog + zapLogger in caller
-		zap.AddCallerSkip(2))
-	return &zapLogger{
-		Core: log.Core(),
-		log:  log.Sugar(),
-	}
-}
-
-func safeLevel(lvl string) zap.AtomicLevel {
-	switch strings.ToLower(lvl) {
-	case "debug":
-		return zap.NewAtomicLevelAt(zap.DebugLevel)
-	case "warn":
-		return zap.NewAtomicLevelAt(zap.WarnLevel)
-	case "error":
-		return zap.NewAtomicLevelAt(zap.ErrorLevel)
-	case "fatal":
-		return zap.NewAtomicLevelAt(zap.FatalLevel)
-	case "panic":
-		return zap.NewAtomicLevelAt(zap.PanicLevel)
-	default:
-		return zap.NewAtomicLevelAt(zap.InfoLevel)
-	}
-}
-
-func newLogger(v *viper.Viper) *zap.Logger {
-	c := zap.NewProductionConfig()
-
-	c.OutputPaths = []string{"stdout"}
-	c.ErrorOutputPaths = []string{"stdout"}
-
-	if v.IsSet("logger.sampling") {
-		c.Sampling = &zap.SamplingConfig{
-			Initial:    defaultSamplingInitial,
-			Thereafter: defaultSamplingThereafter,
-		}
-
-		if val := v.GetInt(cfgLoggerSamplingInitial); val > 0 {
-			c.Sampling.Initial = val
-		}
-
-		if val := v.GetInt(cfgLoggerSamplingThereafter); val > 0 {
-			c.Sampling.Thereafter = val
-		}
-	}
-
-	// logger level
-	c.Level = safeLevel(v.GetString(cfgLoggerLevel))
-	traceLvl := safeLevel(v.GetString(cfgLoggerTraceLevel))
-
-	// logger format
-	switch f := v.GetString(cfgLoggerFormat); strings.ToLower(f) {
-	case formatConsole:
-		c.Encoding = formatConsole
-	default:
-		c.Encoding = formatJSON
-	}
-
-	// logger time
-	c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
-
-	l, err := c.Build(
-		// enable trace only for current log-level
-		zap.AddStacktrace(traceLvl))
-	if err != nil {
-		panic(err)
-	}
-
-	if v.GetBool(cfgLoggerNoDisclaimer) {
-		return l
-	}
-
-	name := v.GetString(cfgApplicationName)
-	version := v.GetString(cfgApplicationVersion)
-
-	return l.With(
-		zap.String("app_name", name),
-		zap.String("app_version", version))
-}
-
-func (z *zapLogger) Info(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Infoln(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Infof(format string, args ...interface{}) { z.log.Infof(format, args...) }
-
-func (z *zapLogger) Println(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Printf(format string, args ...interface{}) { z.log.Infof(format, args...) }
-
-func (z *zapLogger) Warning(args ...interface{}) { z.log.Warn(args...) }
-
-func (z *zapLogger) Warningln(args ...interface{}) { z.log.Warn(args...) }
-
-func (z *zapLogger) Warningf(format string, args ...interface{}) { z.log.Warnf(format, args...) }
-
-func (z *zapLogger) Error(args ...interface{}) { z.log.Error(args...) }
-
-func (z *zapLogger) Errorln(args ...interface{}) { z.log.Error(args...) }
-
-func (z *zapLogger) Errorf(format string, args ...interface{}) { z.log.Errorf(format, args...) }
-
-func (z *zapLogger) Fatal(args ...interface{}) { z.log.Fatal(args...) }
-
-func (z *zapLogger) Fatalln(args ...interface{}) { z.log.Fatal(args...) }
-
-func (z *zapLogger) Fatalf(format string, args ...interface{}) { z.Fatalf(format, args...) }
-
-func (z *zapLogger) V(int) bool { return z.Enabled(zapcore.DebugLevel) }
--- a/cmd/gate/app-settings.go
+++ b/cmd/gate/app-settings.go
@ -1,25 +1,15 @@
 package main

 import (
-	"context"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"sort"
 	"strconv"
 	"strings"
 	"time"

-	"github.com/nspcc-dev/neofs-authmate/accessbox/hcs"
-	crypto "github.com/nspcc-dev/neofs-crypto"
-	"github.com/nspcc-dev/neofs-s3-gate/api/pool"
-	"github.com/nspcc-dev/neofs-s3-gate/auth"
 	"github.com/nspcc-dev/neofs-s3-gate/misc"
-	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
@ -50,6 +40,7 @@ const ( // settings
 	cfgLoggerLevel              = "logger.level"
 	cfgLoggerFormat             = "logger.format"
 	cfgLoggerTraceLevel         = "logger.trace_level"
+	cfgLoggerNoCaller           = "logger.no_caller"
 	cfgLoggerNoDisclaimer       = "logger.no_disclaimer"
 	cfgLoggerSamplingInitial    = "logger.sampling.initial"
 	cfgLoggerSamplingThereafter = "logger.sampling.thereafter"
@ -84,6 +75,7 @@ const ( // settings
 	cfgEnableMetrics  = "metrics"
 	cfgEnableProfiler = "pprof"
 	cfgListenAddress  = "listen_address"
+	cfgListenDomains  = "listen_domains"

 	// Peers
 	cfgPeers = "peers"
@ -113,51 +105,8 @@ var ignore = map[string]struct{}{

 func (empty) Read([]byte) (int, error) { return 0, io.EOF }

-func fetchGateAuthKeys(v *viper.Viper) (*hcs.X25519Keys, error) {
-	path := v.GetString(cfgGateAuthPrivateKey)
-
-	data, err := ioutil.ReadFile(path)
-	if err != nil {
-		return nil, err
-	}
-
-	return hcs.NewKeys(data)
-}
-
-func fetchNeoFSKey(v *viper.Viper) (*ecdsa.PrivateKey, error) {
-	var (
-		err error
-		key *ecdsa.PrivateKey
-	)
-
-	switch val := v.GetString(cfgNeoFSPrivateKey); val {
-	case generated:
-		key, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not generate NeoFS private key")
-		}
-	default:
-		key, err = crypto.LoadPrivateKey(val)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not load NeoFS private key")
-		}
-	}
-
-	return key, nil
-}
-
-func fetchAuthCenter(ctx context.Context, p *authCenterParams) (*auth.Center, error) {
-	return auth.New(ctx, &auth.Params{
-		Con:     p.Pool,
-		Log:     p.Logger,
-		Timeout: p.Timeout,
-		GAKey:   p.GateAuthKeys,
-		NFKey:   p.NeoFSPrivateKey,
-	})
-}
-
-func fetchPeers(l *zap.Logger, v *viper.Viper) []pool.Peer {
-	peers := make([]pool.Peer, 0)
+func fetchPeers(l *zap.Logger, v *viper.Viper) map[string]float64 {
+	peers := make(map[string]float64, 0)

 	for i := 0; ; i++ {

@ -170,15 +119,30 @@ func fetchPeers(l *zap.Logger, v *viper.Viper) []pool.Peer {
 			break
 		}

-		peers = append(peers, pool.Peer{
-			Address: address,
-			Weight:  weight,
-		})
+		peers[address] = weight
+		l.Info("add connection peer",
+			zap.String("address", address),
+			zap.Float64("weight", weight))
 	}

 	return peers
 }

+func fetchDomains(v *viper.Viper) []string {
+	cnt := v.GetInt(cfgListenDomains + ".count")
+	res := make([]string, 0, cnt)
+	for i := 0; ; i++ {
+		domain := v.GetString(cfgListenDomains + "." + strconv.Itoa(i))
+		if domain == "" {
+			break
+		}
+
+		res = append(res, domain)
+	}
+
+	return res
+}
+
 func newSettings() *viper.Viper {
 	v := viper.New()

@ -189,6 +153,7 @@ func newSettings() *viper.Viper {

 	// flags setup:
 	flags := pflag.NewFlagSet("commandline", pflag.ExitOnError)
+	flags.SetOutput(os.Stdout)
 	flags.SortFlags = false

 	flags.Bool(cfgEnableProfiler, false, "enable pprof")
@ -213,6 +178,8 @@ func newSettings() *viper.Viper {
 	flags.String(cfgListenAddress, "0.0.0.0:8080", "set address to listen")
 	peers := flags.StringArrayP(cfgPeers, "p", nil, "set NeoFS nodes")

+	domains := flags.StringArrayP(cfgListenDomains, "d", nil, "set domains to be listened")
+
 	// set prefers:
 	v.Set(cfgApplicationName, misc.ApplicationName)
 	v.Set(cfgApplicationVersion, misc.Version)
@ -224,6 +191,7 @@ func newSettings() *viper.Viper {
 	v.SetDefault(cfgLoggerLevel, "debug")
 	v.SetDefault(cfgLoggerFormat, "console")
 	v.SetDefault(cfgLoggerTraceLevel, "panic")
+	v.SetDefault(cfgLoggerNoCaller, false)
 	v.SetDefault(cfgLoggerNoDisclaimer, true)
 	v.SetDefault(cfgLoggerSamplingInitial, 1000)
 	v.SetDefault(cfgLoggerSamplingThereafter, 1000)
@ -253,6 +221,14 @@ func newSettings() *viper.Viper {
 		}
 	}

+	if domains != nil && len(*domains) > 0 {
+		for i := range *domains {
+			v.SetDefault(cfgListenDomains+"."+strconv.Itoa(i), (*domains)[i])
+		}
+
+		v.SetDefault(cfgListenDomains+".count", len(*domains))
+	}
+
 	switch {
 	case help != nil && *help:
 		fmt.Printf("NeoFS S3 Gateway %s (%s)\n", misc.Version, misc.Build)
--- a/cmd/gate/app.go
+++ b/cmd/gate/app.go
@ -2,39 +2,35 @@ package main

 import (
 	"context"
-	"crypto/ecdsa"
 	"errors"
 	"net"
 	"net/http"
 	"os"
-	"time"

-	"github.com/nspcc-dev/neofs-authmate/accessbox/hcs"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/hcs"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/neofs"
+	"github.com/nspcc-dev/cdn-neofs-sdk/pool"
 	"github.com/nspcc-dev/neofs-s3-gate/api"
+	"github.com/nspcc-dev/neofs-s3-gate/api/auth"
 	"github.com/nspcc-dev/neofs-s3-gate/api/handler"
 	"github.com/nspcc-dev/neofs-s3-gate/api/layer"
-	"github.com/nspcc-dev/neofs-s3-gate/api/pool"
-	"github.com/nspcc-dev/neofs-s3-gate/auth"
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
+	"google.golang.org/grpc"
 	"google.golang.org/grpc/keepalive"
 )

 type (
 	App struct {
-		cli pool.Pool
-		ctr *auth.Center
+		cli pool.Client
+		ctr auth.Center
 		log *zap.Logger
 		cfg *viper.Viper
 		tls *tlsConfig
 		obj layer.Client
 		api api.Handler

-		conTimeout time.Duration
-		reqTimeout time.Duration
-
-		reBalance time.Duration
-
 		maxClients api.MaxClients

 		webDone chan struct{}
@ -50,14 +46,17 @@ type (
 func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 	var (
 		err    error
-		cli    pool.Pool
 		tls    *tlsConfig
+		cli    sdk.Client
+		con    pool.Client
 		caller api.Handler
-		ctr    *auth.Center
+		ctr    auth.Center
 		obj    layer.Client

-		gaKey *hcs.X25519Keys
-		nfKey *ecdsa.PrivateKey
+		hcsCred hcs.Credentials
+		nfsCred neofs.Credentials
+
+		peers = fetchPeers(l, v)

 		reBalance  = defaultRebalanceTimer
 		conTimeout = defaultConnectTimeout
@ -65,6 +64,9 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {

 		maxClientsCount    = defaultMaxClientsCount
 		maxClientsDeadline = defaultMaxClientsDeadline
+
+		hcsCredential = v.GetString(cfgGateAuthPrivateKey)
+		nfsCredential = v.GetString(cfgNeoFSPrivateKey)
 	)

 	if v := v.GetDuration(cfgConnectTimeout); v > 0 {
@ -87,11 +89,11 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		reBalance = v
 	}

-	if nfKey, err = fetchNeoFSKey(v); err != nil {
+	if nfsCred, err = neofs.New(nfsCredential); err != nil {
 		l.Fatal("could not load NeoFS private key")
 	}

-	if gaKey, err = fetchGateAuthKeys(v); err != nil {
+	if hcsCred, err = hcs.NewCredentials(hcsCredential); err != nil {
 		l.Fatal("could not load gate auth key")
 	}

@ -102,54 +104,36 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		}
 	}

-	peers := fetchPeers(l, v)
+	l.Info("using credentials",
+		zap.String("HCS", hcsCredential),
+		zap.String("NeoFS", nfsCredential))

-	poolConfig := &pool.Config{
-		ConnectTimeout: conTimeout,
-		RequestTimeout: reqTimeout,
-		ConnectionTTL:  v.GetDuration(cfgConnectionTTL),
+	poolOptions := []pool.Option{
+		pool.WithLogger(l),
+		pool.WithWeightPool(peers),
+		pool.WithCredentials(nfsCred),
+		pool.WithTickerTimeout(reBalance),
+		pool.WithConnectTimeout(conTimeout),
+		pool.WithRequestTimeout(reqTimeout),
+		pool.WithAPIPreparer(sdk.APIPreparer),
+		pool.WithGRPCOptions(
+			grpc.WithBlock(),
+			grpc.WithInsecure(),
+			grpc.WithKeepaliveParams(keepalive.ClientParameters{
+				Time:                v.GetDuration(cfgKeepaliveTime),
+				Timeout:             v.GetDuration(cfgKeepaliveTimeout),
+				PermitWithoutStream: v.GetBool(cfgKeepalivePermitWithoutStream),
+			}))}

-		Peers: peers,
-
-		Logger:     l,
-		PrivateKey: nfKey,
-
-		GRPCLogger:  gRPCLogger(l),
-		GRPCVerbose: v.GetBool(cfgGRPCVerbose),
-
-		ClientParameters: keepalive.ClientParameters{},
-	}
-
-	if cli, err = pool.New(poolConfig); err != nil {
+	if con, err = pool.New(ctx, poolOptions...); err != nil {
 		l.Fatal("could not prepare pool connections", zap.Error(err))
 	}

-	{ // prepare auth center
-		ctx, cancel := context.WithTimeout(ctx, conTimeout)
-		defer cancel()
-
-		params := &authCenterParams{
-			Logger: l,
-			Pool:   cli,
-
-			Timeout: conTimeout,
-
-			GateAuthKeys:    gaKey,
-			NeoFSPrivateKey: nfKey,
-		}
-
-		if ctr, err = fetchAuthCenter(ctx, params); err != nil {
-			l.Fatal("failed to initialize auth center", zap.Error(err))
-		}
-	}
-
 	{ // should establish connection with NeoFS Storage Nodes
 		ctx, cancel := context.WithTimeout(ctx, conTimeout)
 		defer cancel()

-		cli.ReBalance(ctx)
-
-		if _, err = cli.Connection(ctx); err != nil {
+		if _, err = con.Connection(ctx); err != nil {
 			if errors.Is(err, context.Canceled) {
 				l.Info("connection canceled")
 				os.Exit(0)
@ -160,16 +144,20 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		}
 	}

-	layerParams := &layer.Params{
-		Pool:    cli,
-		Logger:  l,
-		Timeout: reqTimeout,
-		NFKey:   nfKey,
+	if cli, err = sdk.New(ctx,
+		sdk.WithLogger(l),
+		sdk.WithConnectionPool(con),
+		sdk.WithCredentials(nfsCred),
+		sdk.WithAPIPreparer(sdk.APIPreparer)); err != nil {
+		l.Fatal("could not prepare sdk client",
+			zap.Error(err))
 	}

-	if obj, err = layer.NewLayer(layerParams); err != nil {
-		l.Fatal("could not prepare ObjectLayer", zap.Error(err))
-	}
+	// prepare object layer
+	obj = layer.NewLayer(l, cli)
+
+	// prepare auth center
+	ctr = auth.New(cli.Object(), hcsCred.PrivateKey())

 	if caller, err = handler.New(l, obj); err != nil {
 		l.Fatal("could not initialize API handler", zap.Error(err))
@ -177,7 +165,7 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {

 	return &App{
 		ctr: ctr,
-		cli: cli,
+		cli: con,
 		log: l,
 		cfg: v,
 		obj: obj,
@ -187,12 +175,7 @@ func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
 		webDone: make(chan struct{}, 1),
 		wrkDone: make(chan struct{}, 1),

-		reBalance: reBalance,
-
 		maxClients: api.NewMaxClientsMiddleware(maxClientsCount, maxClientsDeadline),
-
-		conTimeout: conTimeout,
-		reqTimeout: reqTimeout,
 	}
 }

@ -231,7 +214,10 @@ func (a *App) Server(ctx context.Context) {
 	attachProfiler(router, a.cfg, a.log)

 	// Attach S3 API:
-	api.Attach(router, a.maxClients, a.api, a.ctr, a.log)
+	domains := fetchDomains(a.cfg)
+	a.log.Info("fetch domains, prepare to use API",
+		zap.Strings("domains", domains))
+	api.Attach(router, domains, a.maxClients, a.api, a.ctr, a.log)

 	// Use mux.Router as http.Handler
 	srv.Handler = router
@ -271,24 +257,7 @@ func (a *App) Server(ctx context.Context) {
 }

 func (a *App) Worker(ctx context.Context) {
-	tick := time.NewTimer(a.reBalance)
-
-loop:
-	for {
-		select {
-		case <-ctx.Done():
-			break loop
-		case <-tick.C:
-			ctx, cancel := context.WithTimeout(ctx, a.conTimeout)
-			a.cli.ReBalance(ctx)
-			cancel()
-
-			tick.Reset(a.reBalance)
-		}
-	}
-
-	tick.Stop()
-	a.cli.Close()
+	a.cli.Worker(ctx)
 	a.log.Info("stopping worker")
 	close(a.wrkDone)
 }
--- a/cmd/gate/app_option.go
+++ b/cmd/gate/app_option.go
@ -1,21 +0,0 @@
-package main
-
-import (
-	"crypto/ecdsa"
-	"time"
-
-	"github.com/nspcc-dev/neofs-authmate/accessbox/hcs"
-	"github.com/nspcc-dev/neofs-s3-gate/api/pool"
-	"go.uber.org/zap"
-)
-
-type (
-	authCenterParams struct {
-		Pool    pool.Client
-		Logger  *zap.Logger
-		Timeout time.Duration
-
-		GateAuthKeys    *hcs.X25519Keys
-		NeoFSPrivateKey *ecdsa.PrivateKey
-	}
-)
--- a/cmd/gate/main.go
+++ b/cmd/gate/main.go
@ -1,10 +1,47 @@
 package main

+import (
+	"github.com/nspcc-dev/cdn-neofs-sdk/grace"
+	"github.com/nspcc-dev/cdn-neofs-sdk/logger"
+	"github.com/spf13/viper"
+	"go.uber.org/zap"
+)
+
+func newLogger(v *viper.Viper) *zap.Logger {
+	options := []logger.Option{
+		logger.WithLevel(v.GetString(cfgLoggerLevel)),
+		logger.WithTraceLevel(v.GetString(cfgLoggerTraceLevel)),
+
+		logger.WithFormat(v.GetString(cfgLoggerFormat)),
+
+		logger.WithSamplingInitial(v.GetInt(cfgLoggerSamplingInitial)),
+		logger.WithSamplingThereafter(v.GetInt(cfgLoggerSamplingThereafter)),
+
+		logger.WithAppName(v.GetString(cfgApplicationName)),
+		logger.WithAppVersion(v.GetString(cfgApplicationVersion)),
+	}
+
+	if v.GetBool(cfgLoggerNoCaller) {
+		options = append(options, logger.WithoutCaller())
+	}
+
+	if v.GetBool(cfgLoggerNoDisclaimer) {
+		options = append(options, logger.WithoutDisclaimer())
+	}
+
+	l, err := logger.New(options...)
+	if err != nil {
+		panic(err)
+	}
+
+	return l
+}
+
 func main() {
 	var (
 		v = newSettings()
 		l = newLogger(v)
-		g = newGracefulContext(l)
+		g = grace.Context(l)
 		a = newApp(g, l, v)
 	)

--- a/docs/aws-s3-compatibility-list.md
+++ b/docs/aws-s3-compatibility-list.md
@ -1,75 +0,0 @@
-## Intro
-
-NeoFS S3 Gate is largely based on [MinIO]("https://min.io") codebase and therefore inherits its basic API, except cases where NeoFS functionality fails to be mapped reasonably.
-
-## Reference Resources
-
-* [MinIO SDK Client Reference]("https://docs.min.io/docs/golang-client-api-reference.html")
-
-* [AWS S3 API Reference]("https://docs.aws.amazon.com/AmazonS3/latest/API/s3-api.pdf")
-
-
-### Bucket/Object-Level Actions
-
-| #   | Method Name               | Status                  |
-|:---:| ------------------------- | ----------------------- |
-| 1   | AbortMultipartUpload      | Unsupported             |
-| 2   | CompleteMultipartUpload   | Unsupported             |
-| 3   | CopyObject                | Supported               |
-| 4   | CopyObjectPart            | Unsupported             |
-| 5   | DeleteBucket              | Unsupported             |
-| 6   | DeleteBucketEncryption    | Unsupported             |
-| 7   | DeleteBucketLifecycle     | Unsupported             |
-| 8   | DeleteBucketPolicy        | Unsupported             |
-| 9   | DeleteBucketTagging       | Unsupported             |
-| 10  | DeleteBucketWebsite       | Unsupported             |
-| 11  | DeleteMultipleObjects     | Unsupported (issue #26) |
-| 12  | DeleteObject              | Supported               |
-| 13  | DeleteObjectTagging       | Unsupported             |
-| 14  | GetBucketACL              | Unsupported             |
-| 15  | GetBucketAccelerate       | Supported               |
-| 16  | GetBucketCors             | Unsupported             |
-| 17  | GetBucketEncryption       | Unsupported             |
-| 18  | GetBucketLifecycle        | Unsupported             |
-| 19  | GetBucketLocation         | Unsupported             |
-| 20  | GetBucketLogging          | Unsupported             |
-| 21  | GetBucketNotification     | Unsupported             |
-| 22  | GetBucketObjectLockConfig | Unsupported             |
-| 23  | GetBucketPolicy           | Unsupported             |
-| 24  | GetBucketReplication      | Unsupported             |
-| 25  | GetBucketRequestPayment   | Unsupported             |
-| 26  | GetBucketTagging          | Unsupported             |
-| 27  | GetBucketVersioning       | Unsupported             |
-| 28  | GetBucketWebsite          | Unsupported             |
-| 29  | GetObject                 | Supported               |
-| 30  | GetObjectACL              | Unsupported             |
-| 31  | GetObjectLegalHold        | Unsupported             |
-| 32  | GetObjectRetention        | Unsupported             |
-| 33  | HeadBucket                | Unsupported (isuue #XX) |
-| 34  | HeadObject                | Supported               |
-| 35  | ListBucketObjectVersions  | Unsupported             |
-| 36  | ListBuckets               | Supported               |
-| 37  | ListMultipartUploads      | Unsupported             |
-| 38  | ListObjectParts           | Unsupported             |
-| 39  | ListObjectsV1             | Supported               |
-| 40  | ListObjectsV2             | Supported               |
-| 41  | ListenBucketNotification  | Unsupported             |
-| 42  | NewMultipartUpload        | Unsupported             |
-| 43  | PostPolicyBucket          | Unsupported             |
-| 44  | PutBucket                 | Unsupported             |
-| 45  | PutBucketACL              | Unsupported             |
-| 46  | PutBucketEncryption       | Unsupported             |
-| 47  | PutBucketLifecycle        | Unsupported             |
-| 48  | PutBucketNotification     | Unsupported             |
-| 49  | PutBucketObjectLockConfig | Unsupported             |
-| 50  | PutBucketPolicy           | Unsupported             |
-| 51  | PutBucketTagging          | Unsupported             |
-| 52  | PutBucketVersioning       | Unsupported             |
-| 53  | PutObject                 | Supported               |
-| 54  | PutObjectACL              | Unsupported             |
-| 55  | PutObjectLegalHold        | Unsupported             |
-| 56  | PutObjectPart             | Unsupported             |
-| 57  | PutObjectRetention        | Unsupported             |
-| 58  | PutObjectTagging          | Unsupported             |
-| 59  | SelectObjectContent       | Unsupported             |
-
--- a/go.mod
+++ b/go.mod
@ -3,34 +3,16 @@ module github.com/nspcc-dev/neofs-s3-gate
 go 1.14

 require (
-	github.com/aws/aws-sdk-go v1.27.0
-	github.com/fsnotify/fsnotify v1.4.9 // indirect
+	github.com/aws/aws-sdk-go v1.35.34
 	github.com/google/uuid v1.1.2
 	github.com/gorilla/mux v1.7.4
-	github.com/mitchellh/mapstructure v1.3.3 // indirect
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/nspcc-dev/neofs-api-go v0.0.0-20201029071528-352e99d9b91a
-	github.com/nspcc-dev/neofs-authmate v0.0.0-20201024131449-35d634118c0d
-	github.com/nspcc-dev/neofs-crypto v0.3.0
-	github.com/pelletier/go-toml v1.8.0 // indirect
+	github.com/nspcc-dev/cdn-neofs-sdk v0.1.0
+	github.com/nspcc-dev/neofs-api-go v1.20.3
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.7.1
-	github.com/prometheus/common v0.11.1 // indirect
-	github.com/spf13/afero v1.3.3 // indirect
-	github.com/spf13/cast v1.3.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.7.1
 	github.com/stretchr/testify v1.6.1
-	go.uber.org/atomic v1.6.0
 	go.uber.org/zap v1.16.0
-	golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f // indirect
-	golang.org/x/sys v0.0.0-20200806125547-5acd03effb82 // indirect
-	golang.org/x/text v0.3.3 // indirect
-	golang.org/x/tools v0.0.0-20200925191224-5d1fdd8fa346 // indirect
-	google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98 // indirect
-	google.golang.org/grpc v1.33.0
-	google.golang.org/protobuf v1.25.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
-	gopkg.in/ini.v1 v1.57.0 // indirect
+	google.golang.org/grpc v1.33.1
 )
--- a/go.sum
+++ b/go.sum
@ -20,35 +20,24 @@ github.com/CityOfZion/neo-go v0.70.1-pre.0.20191212173117-32ac01130d4c/go.mod h1
 github.com/CityOfZion/neo-go v0.71.1-pre.0.20200129171427-f773ec69fb84/go.mod h1:FLI526IrRWHmcsO+mHsCbj64pJZhwQFTLJZu+A4PGOA=
 github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
-github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
-github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
 github.com/Workiva/go-datastructures v1.0.50 h1:slDmfW6KCHcC7U+LP3DDBbm4fqTwZGn1beOFPfGaLvo=
 github.com/Workiva/go-datastructures v1.0.50/go.mod h1:Z+F2Rca0qCsVYDS8z7bAGm8f3UkzuWYS/oBZz5a7VVA=
 github.com/abiosoft/ishell v2.0.0+incompatible/go.mod h1:HQR9AqF2R3P4XXpMpI0NAzgHf/aS6+zVXRj14cVk9qg=
 github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db/go.mod h1:rB3B4rKii8V21ydCbIzH5hZiCQE7f5E9SzUb/ZZx530=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
-github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5/go.mod h1:SkGFH1ia65gfNATL8TAiHDNxPzPdmEL5uirI2Uyuz6c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/alicebob/gopher-json v0.0.0-20180125190556-5a6b3ba71ee6/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
 github.com/alicebob/miniredis v2.5.0+incompatible/go.mod h1:8HZjEj4yU0dwhYHky+DxYx+6BMjkBbe5ONFIF1MXffk=
-github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
-github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
-github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
-github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
-github.com/aws/aws-sdk-go v1.27.0 h1:0xphMHGMLBrPMfxR2AmVjZKcMEESEgWF8Kru94BNByk=
-github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
+github.com/aws/aws-sdk-go v1.35.34 h1:PfsnVvEq7FgsgIOsW8YeParB9ZknW4NXPXcsgqt4srE=
+github.com/aws/aws-sdk-go v1.35.34/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@ -64,8 +53,6 @@ github.com/btcsuite/goleveldb v0.0.0-20160330041536-7834afc9e8cd/go.mod h1:F+uVa
 github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg3lh6TiUghc=
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
-github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
-github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
@ -76,11 +63,8 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
-github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
-github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/etcd v3.3.13+incompatible h1:8F3hqu9fGYLBifCmRCJsicFqDx/D68Rt3q1JMazcgBQ=
@ -89,17 +73,12 @@ github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8Nz
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e h1:Wf6HqHfScWJN9/ZjdUKyjop4mf3Qdd+1TvvltAvM3m8=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f h1:lBNOc5arjvs8E5mO2tbpBpLoyyu8B6e44T7hJy6potg=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
-github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
-github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
-github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@ -113,52 +92,34 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZm
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
-github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
-github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
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 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
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@ -171,13 +132,11 @@ github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:x
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@ -189,14 +148,11 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
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-github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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@ -205,25 +161,17 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
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-github.com/hashicorp/consul/api v1.3.0/go.mod h1:MmDNSzIMUjNpY/mQ398R4bk2FnqQLoPndWW5VkKPlCE=
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-github.com/hashicorp/consul/sdk v0.3.0/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyNV1vwHyQBF0x8=
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@ -239,7 +187,6 @@ github.com/hashicorp/go-syslog v1.0.0/go.mod h1:qPfqrKkXGihmCqbJM2mZgkZGvKG1dFdv
 github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
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@ -252,32 +199,27 @@ github.com/hashicorp/memberlist v0.1.3/go.mod h1:ajVTdAv/9Im8oMAAj5G31PhhMCZJV2p
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@ -286,9 +228,6 @@ github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfn
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@ -296,11 +235,9 @@ github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaO
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@ -314,28 +251,17 @@ github.com/mitchellh/iochan v1.0.0/go.mod h1:JwYml1nuB7xOzsp52dPpHFffvOCDupsG0Qu
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@ -346,11 +272,8 @@ github.com/nspcc-dev/hrw v1.0.9/go.mod h1:l/W2vx83vMQo6aStyx2AuZrJ+07lGv2JQGlVkP
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@ -358,10 +281,7 @@ github.com/nspcc-dev/neofs-crypto v0.3.0/go.mod h1:8w16GEJbH6791ktVqHN9YRNH3s9BE
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@ -370,108 +290,65 @@ github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1Cpa
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@ -479,9 +356,6 @@ github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An
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@ -493,19 +367,14 @@ github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s
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@ -513,26 +382,18 @@ go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
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@ -543,9 +404,7 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0 h1:hb9wdF1z5waM+dSIICn1l0DkLVDT3hqhhQsDNUmHPRE=
 golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@ -564,15 +423,11 @@ golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHl
 golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de h1:5hukYrvBGR8/eNkX5mdUezrA6JiaEZDtJb9Ei+1LlBs=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f h1:J5lckAjkw6qYlOZNj90mLYNTEKDvWeuc1yieZ8qUzUE=
-golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
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 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
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 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
-golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
-golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@ -581,7 +436,6 @@ golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190125091013-d26f9f9a57f3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@ -590,10 +444,10 @@ golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20200602114024-627f9648deb9 h1:pNX+40auqi2JqRfOP1akLGtYcn15TUbkhwuCO3foqqM=
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 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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@ -604,7 +458,6 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@ -612,7 +465,6 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@ -625,36 +477,28 @@ golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@ -675,19 +519,12 @@ golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtn
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 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
@ -695,7 +532,6 @@ google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEn
 google.golang.org/api v0.13.0 h1:Q3Ui3V3/CVinFWFiW39Iw0kMuVrRzYX0wN6OPFp0lTA=
 google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
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 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
@ -704,73 +540,51 @@ google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190530194941-fb225487d101/go.mod h1:z3L6/3dTEVtUr6QSP8miRzeRqwQOioJ9I66odjN4I7s=
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 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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@ -778,5 +592,3 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
-sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
--- a/misc/build.go
+++ b/misc/build.go
@ -1,9 +1,9 @@
 package misc

 const (
-	Prefix = "S3"
-
 	ApplicationName = "neofs-s3-gate"
+
+	Prefix = "S3_GW"
 )

 var (