poc impersonate

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
2023-02-21 15:24:53 +03:00
176 changed files with 5039 additions and 9436 deletions
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@ -1,7 +1,7 @@
 FROM golang:1.19 as builder

 ARG BUILD=now
-ARG REPO=git.frostfs.info/TrueCloudLab/frostfs-s3-gw
+ARG REPO=github.com/TrueCloudLab/frostfs-s3-gw
 ARG VERSION=dev

 WORKDIR /src
--- a/.forgejo/workflows/builds.yml
+++ b/.forgejo/workflows/builds.yml
@ -1,20 +0,0 @@
-on: [pull_request]
-
-jobs:
-  builds:
-    name: Builds
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        go_versions: [ '1.19', '1.20' ]
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '${{ matrix.go_versions }}'
-
-      - name: Build binary
-        run: make
--- a/.forgejo/workflows/dco.yml
+++ b/.forgejo/workflows/dco.yml
@ -1,20 +0,0 @@
-on: [pull_request]
-
-jobs:
-  dco:
-    name: DCO
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-         fetch-depth: 0
-
-      - name: Setup Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-
-      - name: Run commit format checker
-        uses: https://git.frostfs.info/TrueCloudLab/dco-go@v1
-        with:
-          from: 3fbad97a
--- a/.forgejo/workflows/tests.yml
+++ b/.forgejo/workflows/tests.yml
@ -1,34 +0,0 @@
-on: [pull_request]
-
-jobs:
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: golangci-lint
-        uses: https://github.com/golangci/golangci-lint-action@v2
-        with:
-          version: latest
-
-  tests:
-    name: Tests
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        go_versions: [ '1.19', '1.20' ]
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '${{ matrix.go_versions }}'
-
-      - name: Update Go modules
-        run: make dep
-
-      - name: Run tests
-        run: make test
--- a/.forgejo/workflows/vulncheck.yml
+++ b/.forgejo/workflows/vulncheck.yml
@ -1,21 +0,0 @@
-on: [pull_request]
-
-jobs:
-  vulncheck:
-    name: Vulncheck
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-
-      - name: Setup Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-
-      - name: Install govulncheck
-        run: go install golang.org/x/vuln/cmd/govulncheck@latest
-
-      - name: Run govulncheck
-        run: govulncheck ./...
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@ -1 +1 @@
-*       @alexvanin @dkirillov
+*       @alexvanin @KirillovDenis
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@ -1,45 +0,0 @@
---
-name: Bug report
-about: Create a report to help us improve
-title: ''
-labels: community, triage, bug
-assignees: ''
-
---
-
-<!--- Provide a general summary of the issue in the Title above -->
-
-## Expected Behavior
-<!--- If you're describing a bug, tell us what should happen -->
-<!--- If you're suggesting a change/improvement, tell us how it should work -->
-
-## Current Behavior
-<!--- If describing a bug, tell us what happens instead of the expected behavior -->
-<!--- If suggesting a change/improvement, explain the difference from current behavior -->
-
-## Possible Solution
-<!--- Not obligatory -->
-<!--- If no reason/fix/additions for the bug can be suggested, -->
-<!--- uncomment the following phrase: -->
-
-<!--- No fix can be suggested by a QA engineer. Further solutions shall be up to developers. -->
-
-## Steps to Reproduce (for bugs)
-<!--- Provide a link to a live example, or an unambiguous set of steps to -->
-<!--- reproduce this bug. -->
-
-1.
-
-## Context
-<!--- How has this issue affected you? What are you trying to accomplish? -->
-<!--- Providing context helps us come up with a solution that is most useful in the real world -->
-
-## Regression
-<!-- Is this issue a regression? (Yes / No) -->
-<!-- If Yes, optionally please include version or commit id or PR# that caused this regression, if you have these details. -->
-
-## Your Environment
-<!--- Include as many relevant details about the environment you experienced the bug in -->
-* Version used:
-* Server setup and configuration:
-* Operating System and version (`uname -a`):
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@ -1 +0,0 @@
-blank_issues_enabled: false
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@ -1,20 +0,0 @@
---
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: community, triage
-assignees: ''
-
---
-
-## Is your feature request related to a problem? Please describe.
-<!--- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
-
-## Describe the solution you'd like
-<!--- A clear and concise description of what you want to happen. -->
-
-## Describe alternatives you've considered
-<!--- A clear and concise description of any alternative solutions or features you've considered. -->
-
-## Additional context
-<!--- Add any other context or screenshots about the feature request here. -->
--- a/.github/workflows/builds.yml
+++ b/.github/workflows/builds.yml
@ -0,0 +1,73 @@
+name: Builds
+
+on:
+  pull_request:
+    branches:
+      - master
+      - 'support/*'
+    types: [ opened, synchronize ]
+    paths-ignore:
+      - '**/*.md'
+
+jobs:
+  build_cli:
+    name: Build CLI
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.19
+
+      - name: Restore Go modules from cache
+        uses: actions/cache@v2
+        with:
+          path: /home/runner/go/pkg/mod
+          key: deps-${{ hashFiles('go.sum') }}
+
+      - name: Get tree-service client
+        run: make sync-tree
+
+      - name: Update Go modules
+        run: make dep
+
+      - name: Build CLI
+        run: make
+
+      - name: Check version
+        run: if [[ $(make version) == *"dirty"* ]]; then exit 1; fi
+
+  build_image:
+    needs: build_cli
+    name: Build Docker image
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.19
+
+      - name: Restore Go modules from cache
+        uses: actions/cache@v2
+        with:
+          path: /home/runner/go/pkg/mod
+          key: deps-${{ hashFiles('go.sum') }}
+
+      - name: Get tree-service client
+        run: make sync-tree
+
+      - name: Update Go modules
+        run: make dep
+
+      - name: Build Docker image
+        run: make image
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@ -0,0 +1,67 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master, 'support/*' ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, 'support/*' ]
+  schedule:
+    - cron: '35 8 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
--- a/.github/workflows/dco.yml
+++ b/.github/workflows/dco.yml
@ -0,0 +1,22 @@
+name: DCO check
+
+on:
+  pull_request:
+    branches:
+      - master
+      - 'support/*'
+
+jobs:
+  commits_check_job:
+    runs-on: ubuntu-latest
+    name: Commits Check
+    steps:
+    - name: Get PR Commits
+      id: 'get-pr-commits'
+      uses: tim-actions/get-pr-commits@master
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+    - name: DCO Check
+      uses: tim-actions/dco@master
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@ -0,0 +1,96 @@
+name: Tests
+
+on:
+  pull_request:
+    branches:
+      - master
+      - 'support/*'
+    types: [opened, synchronize]
+    paths-ignore:
+      - '**/*.md'
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Get tree-service client
+        run: make sync-tree
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: latest
+
+  cover:
+    name: Coverage
+    runs-on: ubuntu-20.04
+
+    env:
+      CGO_ENABLED: 1
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.19
+
+      - name: Restore Go modules from cache
+        uses: actions/cache@v2
+        with:
+          path: /home/runner/go/pkg/mod
+          key: deps-${{ hashFiles('go.sum') }}
+
+      - name: Get tree-service client
+        run: make sync-tree
+
+      - name: Update Go modules
+        run: make dep
+
+      - name: Test and write coverage profile
+        run: make cover
+
+      - name: Upload coverage results to Codecov
+        uses: codecov/codecov-action@v1
+        with:
+          fail_ci_if_error: false
+          path_to_write_report: ./coverage.txt
+          verbose: true
+
+  tests:
+    name: Tests
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        go_versions: [ '1.18.x', '1.19.x' ]
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '${{ matrix.go_versions }}'
+
+      - name: Restore Go modules from cache
+        uses: actions/cache@v2
+        with:
+          path: /home/runner/go/pkg/mod
+          key: deps-${{ hashFiles('go.sum') }}
+
+      - name: Get tree-service client
+        run: make sync-tree
+
+      - name: Update Go modules
+        run: make dep
+
+      - name: Run tests
+        run: make test
--- a/.gitignore
+++ b/.gitignore
@ -2,6 +2,9 @@
 .idea
 .vscode

+# Tree service
+internal/frostfs/services/tree/
+
 # Vendoring
 vendor

@ -25,3 +28,4 @@ debian/files
 debian/*.log
 debian/*.substvars
 debian/frostfs-s3-gw/
+
--- a/.gitlint
+++ b/.gitlint
@ -1,11 +0,0 @@
-[general]
-fail-without-commits=True
-regex-style-search=True
-contrib=CC1
-
-[title-match-regex]
-regex=^\[\#[0-9Xx]+\]\s
-
-[ignore-by-title]
-regex=^Release(.*)
-ignore=title-match-regex
--- a/.golangci.yml
+++ b/.golangci.yml
@ -4,7 +4,7 @@
 # options for analysis running
 run:
  # timeout for analysis, e.g. 30s, 5m, default is 1m
-  timeout: 15m
+  timeout: 5m

  # include test files or not, default is true
  tests: true
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@ -1,45 +0,0 @@
-ci:
-  autofix_prs: false
-
-repos:
-  - repo: https://github.com/jorisroovers/gitlint
-    rev:  v0.19.1
-    hooks:
-      - id: gitlint
-        stages: [commit-msg]
-      - id: gitlint-ci
-
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
-    hooks:
-      - id: check-added-large-files
-      - id: check-case-conflict
-      - id: check-executables-have-shebangs
-      - id: check-shebang-scripts-are-executable
-      - id: check-merge-conflict
-      - id: check-json
-      - id: check-xml
-      - id: check-yaml
-      - id: trailing-whitespace
-        args: [--markdown-linebreak-ext=md]
-      - id: end-of-file-fixer
-        exclude: ".key$"
-
-  - repo: https://github.com/shellcheck-py/shellcheck-py
-    rev: v0.9.0.2
-    hooks:
-      - id: shellcheck
-
-  - repo: https://github.com/golangci/golangci-lint
-    rev: v1.51.2
-    hooks:
-      - id: golangci-lint
-
-  - repo: local
-    hooks:
-      -   id: go-unit-tests
-          name: go unit tests
-          entry: make test
-          pass_filenames: false
-          types: [go]
-          language: system
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -5,81 +5,424 @@ This document outlines major changes between releases.
 ## [Unreleased]

 ### Fixed
- Handle negative `Content-Length` on put (#125)
- Use `DisableURIPathEscaping` to presign urls (#125)
- Use specific s3 errors instead of `InternalError` where possible (#143)
- `grpc` schemas in tree configuration (#166)
- Return appropriate 404 code when object missed in storage but there is in gate cache (#158)
- Replace part on re-upload when use multipart upload (#176)
+- Get empty bucket CORS from frostfs (TrueCloudLab#36)

 ### Added
- Support dump metrics descriptions (#80)
- Add `copies_numbers` section to `placement_policy` in config file and support vectors of copies numbers (#70, #101)
- Support impersonate bearer token (#81, #105)
- Reload default and custom copies numbers on SIGHUP (#104)
- Tracing support (#84, #140)
- Return bearer token in `s3-authmate obtain-secret` result (#132)
- Support multiple version credentials using GSet (#135)
- Implement chunk uploading (#106)
- Add new `kludge.bypass_content_encoding_check_in_chunks` config param (#146)
+- Return container name in `head-bucket` response (TrueCloudLab#18)
+- Billing metrics (TrueCloudLab#5)
+- Multiple configs support (TrueCloudLab#21)
+- Bucket name resolving policy (TrueCloudLab#25)

 ### Changed
- Update prometheus to v1.15.0 (#94)
- Update go version to go1.19 (#118)
- Remove object from tree and reset its cache on object deletion when it is already removed from storage (#78)
- Finish rebranding (#2)
- Timeout errors has code 504 now (#103)
- Use request scope logger (#111)
- Add `s3-authmate update-secret` command (#131)
- Use default registerer for app metrics (#155)
- Use chi router instead of archived gorlilla/mux (#149)
- Complete multipart upload doesn't unnecessary copy now. Thus, the total time of multipart upload was reduced by 2 times (#63)
-
-### Removed
- Drop `tree.service` param (now endpoints from `peers` section are used) (#133)
-
-## [0.27.0] - Karpinsky - 2023-07-12
-
-This is a first FrostFS S3 Gateway release named after
-[Karpinsky glacier](https://en.wikipedia.org/wiki/Karpinsky_Glacier).
-
-### Fixed
- Using multiple servers require only one healthy (#12)
- Renew token before it expires (#20)
- Add generated deb builder files to .gitignore, and fix typo (#28)
- Get empty bucket CORS from frostfs (#36)
- Don't count pool error on client abort (#35)
- Handle request cancelling (#69)
- Clean up List and Name caches when object is missing in Tree service (#57)
- Don't create unnecessary delete-markers (#83)
- `Too many pings` error (#145)
-
-### Added
- Billing metrics (#5, #26, #29)
- Return container name in `head-bucket` response (#18)
- Multiple configs support (#21)
- Bucket name resolving policy (#25)
- Support string `Action` and `Resource` fields in `bucketPolicy.Statement` (#32)
- Add new `kludge.use_default_xmlns_for_complete_multipart` config param (#40)
- Return `X-Owner-Id` in `head-bucket` response (#79)
- Support multiple tree service endpoints (#74, #110, #114)
-
-### Changed
- Repository rebranding (#1)
 - Update neo-go to v0.101.0 (#14)
 - Update viper to v1.15.0 (#14)
- Update go version to go1.18 (#16)
- Return error on invalid LocationConstraint (#23)
- Limit number of objects to delete at one time (#37)
- CompleteMultipartUpload handler now sends whitespace characters to keep alive client's connection (#60)
- Support new system attributes (#64)
- Abstract network communication in TreeClient (#59, #75)
- Changed values for `frostfs_s3_gw_state_health` metric (#91)
+- Using multiple servers require only one healthy (TrueCloudLab#12)
+- Update go version to go1.18 (TrueCloudLab#16)
+- Return error on invalid LocationConstraint (TrueCloudLab#23)
+- Place billing metrics to separate url path (TrueCloudLab#26)
+- Add generated deb builder files to .gitignore, and fix typo (TrueCloudLab#28)
+
+## [0.26.0] - 2022-12-28
+
+### Added
+- Use client time as `now` in some requests (#726)
+- Reload policies on SIGHUP (#747)
+- Authmate flags for pool timeouts (#760)
+- Multiple server listeners (#742)
+
+### Changed
+- Placement policy configuration (#568)
+- Improved debug logging of CID and OID values (#754)
+
+### Removed
+- Deprecated linters (#755)
+
+### Updating from v0.25.1
+New config parameters were added. And old one `defaul_policy` were changed.
+```yaml
+placement_policy:
+  default: "REP 3"
+  region_mapping: /path/to/container/policies.json
+```
+
+Make sure you update the config accordingly:
+If you configure application using environment variables change:
+* `S3_GW_DEFAULT_POLICY` -> `S3_GW_PLACEMENT_POLICY_DEFAULT_POLICY`
+* `S3_GW_LISTEN_ADDRESS` -> `S3_GW_SERVER_0_ADDRESS`
+* `S3_GW_TLS_CERT_FILE` -> `S3_GW_SERVER_0_TLS_CERT_FILE` (and set `S3_GW_SERVER_0_TLS_ENABLED=true`)
+* `S3_GW_TLS_KEY_FILE` -> `S3_GW_SERVER_0_TLS_KEY_FILE` (and set `S3_GW_SERVER_0_TLS_ENABLED=true`)
+
+If you configure application using `.yaml` file change:
+* `defaul_policy` -> `placement_policy.default`
+* `listen_address` -> `server.0.address`
+* `tls.cert_file` -> `server.0.tls.cert_file` (and set `server.0.tls.enabled: true`)
+* `tls.key_file` -> `server.0.tls.key_file` (and set `server.0.tls.enabled: true`)
+
+## [0.25.1] - 2022-10-30
+
+### Fixed
+- Empty bucket policy (#740)
+- Big object removal (#749)
+- Checksum panic (#741)
+
+### Added
+- Debian packaging (#737)
+- Timeout for individual operations in streaming RPC (#750)
+
+## [0.25.0] - 2022-10-31
+
+### Fixed
+- Legal hold object lock enabling (#709)
+- Errors at object locking (#719)
+- Unrestricted access to not owned objects via cache (#713)
+- Check tree service health (#699)
+- Bucket names in listing (#733)
+
+### Added
+- Config reloading on SIGHUP (#702, #715, #716)
+- Stop pool dial on SIGINT (#712)
+
+### Changed
+- GitHub actions update (#710)
+- Makefile help (#725)
+- Optimized object tags setting (#669) 
+- Improved logging (#728)
+- Unified unit test names (#617)
+- Improved docs (#732)
+
+### Removed
+- Unused cache methods (#650)
+
+### Updating from v0.24.0
+New config parameters were added. Make sure the default parameters are appropriate for you.
+
+```yaml
+cache:
+  accesscontrol:
+    lifetime: 1m
+    size: 100000
+```
+
+## [0.24.0] - 2022-09-14
+
+### Added
+- Exposure of pool metrics (#615, #680)
+- Configuration of `set_copies_number` (#634, #637)
+- Configuration of list of allowed `AccessKeyID` prefixes (#674)
+- Tagging directive for `CopyObject` (#666, #683)
+- Customer encryption (#595)
+- `CopiesNumber` configuration (#634, #637)
+
+### Changed
+- Improved wallet configuration via `.yaml` config and environment variables (#607)
+- Update go version for build to 1.19 (#694, #705)
+- Update version calculation (#653, #697)
+- Optimized lock creation (#692)
+- Update way to configure `listen_domains` (#667)
+- Use `FilePath` instead of `FileName` for object keys (#657)
+- Optimize listing (#625, #616)
+
+### Removed
+- Drop any object search logic (#545)
+
+### Fixed
+- Responses to `GetObject` and `HeadObject`: removed redundant `VersionID` (#577, #682)
+- Replacement of object tagging in case of overwriting of an object (#645)
+- Using tags cache with empty `versionId` (#643)
+- Fix panic on go1.19 (#678)
+- Fix panic on invalid versioning status (#660)
+- Fix panic on missing decrypt reader (#704)
+- Using multipart uploads with `/` in name (#671)
+- Don't update settings cache when request fails (#661)
+- Fix handling `X-Amz-Copy-Source` header (#672)
+- ACL related problems (#676, #606)
+- Using `ContinuationToken` for "directories" (#684)
+- Fix `connection was closed` error (#656)
+- Fix listing for nested objects (#624)
+- Fix anon requests to tree service (#504, #505)
+
+### Updating from v0.23.0
+Make sure your configuration is valid:
+
+If you configure application using environment variables change:
+* `S3_GW_WALLET` -> `S3_GW_WALLET_PATH`
+* `S3_GW_ADDRESS` -> `S3_GW_WALLET_ADDRESS`
+* `S3_GW_LISTEN_DOMAINS_N` -> `S3_GW_LISTEN_DOMAINS` (use it as array variable)
+
+If you configure application using `.yaml` file change:
+* `wallet` -> `wallet.path` 
+* `address` -> `wallet.address`
+* `listen_domains.n` -> `listen_domains` (use it as array param)
+
+
+## [0.23.0] - 2022-08-01
+
+### Fixed
+- System metadata are filtered now (#619)
+- List objects in corner cases (#612, #627)
+- Correct removal of a deleted object (#610)
+- Bucket creation could lead to "no healthy client" error (#636)
+
+### Added
+- New param to configure pool error threshold (#633)
+
+### Changed
+- Pprof and prometheus metrics configuration (#591)
+- Don't set sticky bit in authmate container (#540)
+- Updated compatibility table (#638)
+- Rely on string sanitizing from zap (#498)
+
+### Updating from v0.22.0
+1. To enable pprof use `pprof.enabled` instead of `pprof` in config. 
+To enable prometheus metrics use `prometheus.enabled` instead of `metrics` in config. 
+If you are using the command line flags you can skip this step.
+
+## [0.22.0] - 2022-07-25
+
+Tree service support
+
+### Fixed
+- Error logging (#450)
+- Default bucket location constraint (#463)
+- Suspended versioning status (#462)
+- CodeQL warnings (#489, #522, #539)
+- Bearer token behaviour with non-owned buckets (#459)
+- ACL issues (#495, #553, #571, #573, #574, #580)
+- Authmate policy parsing (#558)
+
+### Added
+- Public key output in authmate issue-secret command (#482)
+- Support of conditional headers (#484)
+- Cache type cast error logging (#465)
+- `docker/*` target in Makefile (#471)
+- Pre signed requests (#529)
+- Tagging and ACL notifications (#361) 
+- AWSv4 signer package to improve compatibility with S3 clients (#528)
+- Extension mimetype detector (#289)
+- Default params documentation (#592)
+- Health metric (#600)
+- Parallel object listing (#525)
+- Tree service (see commit links from #609)
+
+### Changed
+- Reduce number of network requests (#439, #441)
+- Renamed authmate to s3-authmate (#518)
+- Version output (#578)
+- Improved error messages (#539)
+
+### Removed
+- `layer/neofs` package (#438)
+
+## [0.21.1] - 2022-05-16
+
+### Changed
+- Update go version to go1.17 (#427)
+- Set homomorphic hashing disable attribute in container if required (#435)
+
+## [0.21.0] - 2022-05-13
+
+### Added
+- Support of get-object-attributes (#430)
+
+### Fixed
+- Reduced time of bucket creation (#426)
+- Bucket removal (#428)
+- Obtainment of ETag value (#431)
+
+### Changed
+- Authmate doesn't parse session context anymore, now it accepts application defined 
+  flexible structure with container ID in human-readable format (#428)
+
+## [0.20.0] - 2022-04-29
+
+### Added
+- Support of object locking (#195)  
+- Support of basic notifications (#357, #358, #359)
+
+### Changed
+- Logger behavior: now it writes to stderr instead of stdout, app name and 
+  version are always presented and fixed, all user options except of `level` are 
+  dropped (#380)
+- Improved docs, added config examples (#396, #398)
+- Updated NeoFS SDK (#365, #409)
+
+### Fixed
+- Added check of `SetEACL` tokens before processing of requests (#347)
+- Authmate: returned lost session tokens when a parameter `--session-token` is 
+  omitted (#387)
+- Error when a bucket hasn't a settings file (#389)
+- Response to a request to delete not existing object (#392)
+- Replaced gate key in ACL Grantee by key of bearer token issuer (#395) 
+- Missing attach of bearer token to requests to put system object (#399)
+- Deletion of system object while CompleteMultipartUpload (#400)
+- Improved English in docs and comments (#405)
+- Authmate: reconsidered default bearer token rules (#406)
+
+## [0.19.0] - 2022-03-16
+
+### Added
+- Authmate: support placement policy overriding (#343, #364)
+- Managing bucket notification configuration (#340)
+- Unit tests in go1.17 (#265)
+- NATS settings in application config (#341)
+- Support `Expires` and `Cache-Control` headers (#312)
+- Support `%` as delimiter (#313)
+- Support `null` version deletion (#319)
+- Bucket name resolving order (#285)
+- Authmate: added `timeout` flag (#290)
+- MinIO results in s3 compatibility tables (#304)
+- Support overriding response headers (#310)
+
+### Changed
+- Authmate: check parameters before container creation (#372)
+- Unify cache invalidation on deletion (#368)
+- Updated NeoFS SDK to v1.0.0-rc.3 (#297, #333, #346, #376)
+- Authmate: changed session token rules handling (#329, #336, #338, #352)
+- Changed status code for some failed requests (#308)
+- GetBucketLocation returns policy name used at bucket creation (#301) 
+
+### Fixed
+- Waiting for bucket to be deleted (#366)
+- Authmate: changed error message for session context building (#348)
+- Authmate: fixed access key parsing in `obtain-secret` command (#295)
+- Distinguishing `BucketAlreadyExists` errors (#354)
+- Incorrect panic if handler not found (#305)
+- Authmate: use container friendly name as system name (#299, #324)
+- Use UTC `Last-Modified` timestamps (#331)
+- Don't return object system metadata (#307)
+- Handling empty post policy (#306)
+- Use `X-Amz-Verion-Id` in `CompleteMulipartUpload` (#318)
+
+### Removed
+- Drop MinIO related errors (#316)
+
+## [0.18.0] - 2021-12-16
+
+### Added
+- Support for MultipartUpload (#186, #187) 
+- CORS support (#217)
+- Authmate supports setting of tokens lifetime in a more convenient format (duration) (#258)
+- Generation of a random key for `--no-sign-request` (#276)
+
+### Changed
+- Bucket name resolving mechanism from listing owner's containers to using DNS (#219)
+
+### Removed
+- Deprecated golint, replaced by revive (#272)
+
+## 0.17.0 (24 Sep 2021)
+With this release we introduce [ceph-based](https://github.com/ceph/s3-tests) S3 compatibility results.
+
+### Added
+* Versioning support (#122, #242, #263)
+* Ceph S3 compatibility results (#150, #249, #266)
+* Handling `X-Amz-Expected-Bucket-Owner` header (#216)
+* `X-Container-Id` header for `HeadBucket` response (#220)
+* Basic ACL support (#49, #213)
+* Caching (#179, #206, #231, #236, #253)
+* Metadata directive when copying (#191)
+* Bucket name checking (189)
+* Continuation token support (#112, #154, #180)
+* Mapping `LocationConstraint` to `PlacementPolicy` (#89)
+* Tagging support (#196)
+* POST uploading support (#190)
+* Delete marker support (#248)
+* Expiration for access box (#255)
+* AWS CLI credential generating by authmate (#241) 
+
+### Changed
+* Default placement policy is now configurable (#218) 
+* README is split into different files (#210)
+* Unified error handling (#89, #149, #184)
+* Authmate issue-secret response contains container id (#163)
+* Removed "github.com/nspcc-dev/neofs-node" dependency (#234)
+* Removed GitHub workflow of image publishing (#243)
+* Changed license to AGPLv3 (#264)
+
+### Fixed
+* ListObjects results are now the same for different users (#230)
+* Error response for invalid authentication header is now correct (#199)
+* Saving object metadata (#198)
+* Range header handling (#194)
+* Correct status codes (#118, #262)
+* HeadObject for "directories" (#160)
+* Fetch-owner parameter support (#159)
+
+## 0.16.0 (16 Jul 2021)
+
+With this release we publish S3 gateway source code. It includes various S3
+compatibility improvements, support of bucket management, unified secp256r1
+cryptography with NEP-6 wallet support.
+
+### Fixed
+ * Allowed no-sign request (#65)
+ * Bearer token attached to all requests (#84)
+ * Time format in responses (#133)
+ * Max-keys checked in ListObjects (#135)
+ * Lost metadat in the objects (#131)
+ * Unique bucket name check (#125)
+
+### Added
+ * Bucket management operations (#47, #72)
+ * Node-specific owner IDs in bearer tokens (#83)
+ * AWS CLI usage section in README (#77)
+ * List object paging (#97)
+ * Lifetime for the tokens in auth-mate (#108)
+ * Support of range in GetObject request (#96)
+ * Support of NEP-6 wallets instead of binary encoded keys (#92)
+ * Support of JSON encoded rules in auth-mate (#71)
+ * Support of delimiters in ListObjects (#98)
+ * Support of object ETag (#93)
+ * Support of time-based conditional CopyObject and GetObject (#94)
+
+### Changed
+ * Accesskey format: now `0` used as a delimiter between container ID and object 
+   ID instead of `_` (#164)
+ * Accessbox is encoded in protobuf format (#48)
+ * Authentication uses secp256r1 instead of ed25519 (#75)
+ * Improved integration with NeoFS SDK and NeoFS API Go (#78, #88)
+ * Optimized object put execution (#155)
+
+### Removed
+ * GRPC keepalive options (#73)
+
+## 0.15.0 (10 Jun 2021)
+
+This release brings S3 gateway to the current state of NeoFS and fixes some
+bugs, no new significant features introduced (other than moving here already
+existing authmate component).
+
+New features:
+ * authmate was moved into this repository and is now built along with the
+   gateway itself (#46)
+
+Behavior changes:
+ * neofs-s3-gate was renamed to neofs-s3-gw (#50)
+
+Improvements:
+ * better Makefile (#43, #45, #55)
+ * stricter linters (#45)
+ * removed non-standard errors package from dependencies (#54)
+ * refactoring, reusing new sdk-go component (#60, #62, #63)
+ * updated neofs-api-go for compatibility with current NeoFS node 0.21.0 (#60, #68)
+ * extended README (#67, #76)
+
+Bugs fixed:
+ * wrong (as per AWS specification) access key ID generated (#64)

 ## Older versions

-This project is a fork of [NeoFS S3 Gateway](https://github.com/nspcc-dev/neofs-s3-gw) from version v0.26.0.
-To see CHANGELOG for older versions, refer to https://github.com/nspcc-dev/neofs-s3-gw/blob/master/CHANGELOG.md.
+Please refer to [Github
+releases](https://github.com/nspcc-dev/neofs-s3-gw/releases/) for older
+releases.

-[0.27.0]: https://git.frostfs.info/TrueCloudLab/frostfs-s3-gw/compare/b2148cc3...v0.27.0
-[Unreleased]: https://git.frostfs.info/TrueCloudLab/frostfs-s3-gw/compare/v0.27.0...master
+[0.18.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.17.0...v0.18.0
+[0.19.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.18.0...v0.19.0
+[0.20.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.19.0...v0.20.0
+[0.21.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.20.0...v0.21.0
+[0.21.1]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.21.0...v0.21.1
+[0.22.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.21.1...v0.22.0
+[0.23.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.22.0...v0.23.0
+[0.24.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.23.0...v0.24.0
+[0.25.0]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.24.0...v0.25.0
+[Unreleased]: https://github.com/nspcc-dev/neofs-s3-gw/compare/v0.25.0...master
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -3,8 +3,8 @@
 First, thank you for contributing! We love and encourage pull requests from
 everyone. Please follow the guidelines:

- Check the open [issues](https://git.frostfs.info/TrueCloudLab/frostfs-s3-gw/issues) and
-  [pull requests](https://git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pulls) for existing
+- Check the open [issues](https://github.com/TrueCloudLab/frostfs-s3-gw/issues) and
+  [pull requests](https://github.com/TrueCloudLab/frostfs-s3-gw/pulls) for existing
  discussions.

 - Open an issue first, to discuss a new feature or enhancement.
@ -27,20 +27,20 @@ Start by forking the `frostfs-s3-gw` repository, make changes in a branch and th
 send a pull request. We encourage pull requests to discuss code changes. Here
 are the steps in details:

-### Set up your git repository
+### Set up your GitHub Repository
 Fork [FrostFS S3 Gateway
-upstream](https://git.frostfs.info/repo/fork/15) source repository
+upstream](https://github.com/TrueCloudLab/frostfs-s3-gw/fork) source repository
 to your own personal repository. Copy the URL of your fork (you will need it for
 the `git clone` command below).

 ```sh
-$ git clone https://git.frostfs.info/<username>/frostfs-s3-gw.git
+$ git clone https://github.com/TrueCloudLab/frostfs-s3-gw
 ```

 ### Set up git remote as ``upstream``
 ```sh
 $ cd frostfs-s3-gw
-$ git remote add upstream https://git.frostfs.info/TrueCloudLab/frostfs-s3-gw.git
+$ git remote add upstream https://github.com/TrueCloudLab/frostfs-s3-gw
 $ git fetch upstream
 $ git merge upstream/master
 ...
@ -90,8 +90,8 @@ $ git push origin feature/123-something_awesome
 ```

 ### Create a Pull Request
-Pull requests can be created via Forgejo. Refer to [this
-document](https://docs.codeberg.org/collaborating/pull-requests-and-git-flow/) for
+Pull requests can be created via GitHub. Refer to [this
+document](https://help.github.com/articles/creating-a-pull-request/) for
 detailed steps on how to create a pull request. After a Pull Request gets peer
 reviewed and approved, it will be merged.

--- a/23
+++ b/23
@ -7,8 +7,6 @@ GO_VERSION ?= 1.19
 LINT_VERSION ?= 1.49.0
 BINDIR = bin

-METRICS_DUMP_OUT ?= ./metrics-dump.json
-
 # Binaries to build
 CMDS = $(addprefix frostfs-, $(notdir $(wildcard cmd/*)))
 BINS = $(addprefix $(BINDIR)/, $(CMDS))
@ -18,7 +16,7 @@ REPO_BASENAME = $(shell basename `go list -m`)
 HUB_IMAGE ?= "truecloudlab/$(REPO_BASENAME)"
 HUB_TAG ?= "$(shell echo ${VERSION} | sed 's/^v//')"

-.PHONY: all $(BINS) $(BINDIR) dep docker/ test cover format image image-push dirty-image lint docker/lint pre-commit unpre-commit version clean protoc
+.PHONY: all $(BINS) $(BINDIR) dep docker/ test cover format image image-push dirty-image lint docker/lint version clean protoc

 # .deb package versioning
 OS_RELEASE = $(shell lsb_release -cs)
@ -30,7 +28,7 @@ PKG_VERSION ?= $(shell echo $(VERSION) | sed "s/^v//" | \
 # Make all binaries
 all: $(BINS)

-$(BINS): $(BINDIR) dep
+$(BINS): sync-tree $(BINDIR) dep
 	@echo "⇒ Build $@"
 	CGO_ENABLED=0 \
 	go build -v -trimpath \
@ -41,6 +39,10 @@ $(BINDIR):
 	@echo "⇒ Ensure dir: $@"
 	@mkdir -p $@

+# Synchronize tree service
+sync-tree:
+	@./syncTree.sh
+
 # Pull go dependencies
 dep:
 	@printf "⇒ Download requirements: "
@ -113,14 +115,6 @@ docker/lint:
 	--env HOME=/src \
 	golangci/golangci-lint:v$(LINT_VERSION) bash -c 'cd /src/ && make lint'

-# Activate pre-commit hooks
-pre-commit:
-	pre-commit install -t pre-commit -t commit-msg
-
-# Deactivate pre-commit hooks
-unpre-commit:
-	pre-commit uninstall -t pre-commit -t commit-msg
-
 # Show current version
 version:
 	@echo $(VERSION)
@ -151,9 +145,4 @@ debpackage:
 debclean:
 	dh clean	

-# Dump metrics (use METRICS_DUMP_OUT variable to override default out file './metrics-dump.json')
-.PHONY: dump-metrics
-dump-metrics:
-	@go test ./metrics -run TestDescribeAll --tags=dump_metrics --out=$(abspath $(METRICS_DUMP_OUT))
-
 include help.mk
--- a/README.md
+++ b/README.md
@ -6,9 +6,9 @@
 </p>

 ---
-[![Report](https://goreportcard.com/badge/git.frostfs.info/TrueCloudLab/frostfs-s3-gw)](https://goreportcard.com/report/git.frostfs.info/TrueCloudLab/frostfs-s3-gw)
-![Release](https://img.shields.io/badge/dynamic/json.svg?label=release&url=https://git.frostfs.info/api/v1/repos/TrueCloudLab/frostfs-s3-gw/releases&query=$[0].tag_name&color=orange)
-![License](https://img.shields.io/badge/license-GPL--3.0-orange.svg)
+[![Report](https://goreportcard.com/badge/github.com/TrueCloudLab/frostfs-s3-gw)](https://goreportcard.com/report/github.com/TrueCloudLab/frostfs-s3-gw)
+![GitHub release (latest SemVer)](https://img.shields.io/github/v/release/TrueCloudLab/frostfs-s3-gw?sort=semver)
+![License](https://img.shields.io/github/license/TrueCloudLab/frostfs-s3-gw.svg?style=popout)

 # FrostFS S3 Gateway

@ -16,7 +16,7 @@ FrostFS S3 gateway provides API compatible with Amazon S3 cloud storage service.

 ## Installation

-```go get -u git.frostfs.info/TrueCloudLab/frostfs-s3-gw```
+```go get -u github.com/TrueCloudLab/frostfs-s3-gw```

 Or you can call `make` to build it from the cloned repository (the binary will
 end up in `bin/frostfs-s3-gw` with authmate helper in `bin/frostfs-s3-authmate`).
--- a/2
+++ b/2
@ -1 +1 @@
-v0.27.0
+v0.26.0
--- a/api/auth/center.go
+++ b/api/auth/center.go
@ -14,12 +14,12 @@ import (
 	"strings"
 	"time"

-	v4 "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth/signer/v4"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/cache"
-	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/tokens"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	v4 "github.com/TrueCloudLab/frostfs-s3-gw/api/auth/signer/v4"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/cache"
+	apiErrors "github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/tokens"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/aws/aws-sdk-go/aws/credentials"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 )
@ -40,7 +40,6 @@ type (
 	Box struct {
 		AccessBox  *accessbox.Box
 		ClientTime time.Time
-		AuthHeaders *AuthHeader
 	}

 	center struct {
@ -52,8 +51,7 @@ type (

 	prs int

-	//nolint:revive
-	AuthHeader struct {
+	authHeader struct {
 		AccessKeyID  string
 		Service      string
 		Region       string
@ -103,7 +101,7 @@ func New(frostFS tokens.FrostFS, key *keys.PrivateKey, prefixes []string, config
 	}
 }

-func (c *center) parseAuthHeader(header string) (*AuthHeader, error) {
+func (c *center) parseAuthHeader(header string) (*authHeader, error) {
 	submatches := c.reg.GetSubmatches(header)
 	if len(submatches) != authHeaderPartsNum {
 		return nil, apiErrors.GetAPIError(apiErrors.ErrAuthorizationHeaderMalformed)
@ -116,7 +114,7 @@ func (c *center) parseAuthHeader(header string) (*AuthHeader, error) {

 	signedFields := strings.Split(submatches["signed_header_fields"], ";")

-	return &AuthHeader{
+	return &authHeader{
 		AccessKeyID:  submatches["access_key_id"],
 		Service:      submatches["service"],
 		Region:       submatches["region"],
@ -126,7 +124,7 @@ func (c *center) parseAuthHeader(header string) (*AuthHeader, error) {
 	}, nil
 }

-func (a *AuthHeader) getAddress() (oid.Address, error) {
+func (a *authHeader) getAddress() (oid.Address, error) {
 	var addr oid.Address
 	if err := addr.DecodeString(strings.ReplaceAll(a.AccessKeyID, "0", "/")); err != nil {
 		return addr, apiErrors.GetAPIError(apiErrors.ErrInvalidAccessKeyID)
@ -137,7 +135,7 @@ func (a *AuthHeader) getAddress() (oid.Address, error) {
 func (c *center) Authenticate(r *http.Request) (*Box, error) {
 	var (
 		err                  error
-		authHdr              *AuthHeader
+		authHdr              *authHeader
 		signatureDateTimeStr string
 		needClientTime       bool
 	)
@ -148,7 +146,7 @@ func (c *center) Authenticate(r *http.Request) (*Box, error) {
 		if len(creds) != 5 || creds[4] != "aws4_request" {
 			return nil, fmt.Errorf("bad X-Amz-Credential")
 		}
-		authHdr = &AuthHeader{
+		authHdr = &authHeader{
 			AccessKeyID:  creds[0],
 			Service:      creds[3],
 			Region:       creds[2],
@ -202,10 +200,7 @@ func (c *center) Authenticate(r *http.Request) (*Box, error) {
 		return nil, err
 	}

-	result := &Box{
-		AccessBox:   box,
-		AuthHeaders: authHdr,
-	}
+	result := &Box{AccessBox: box}
 	if needClientTime {
 		result.ClientTime = signatureDateTime
 	}
@ -272,7 +267,7 @@ func (c *center) checkFormData(r *http.Request) (*Box, error) {
 	return &Box{AccessBox: box}, nil
 }

-func cloneRequest(r *http.Request, authHeader *AuthHeader) *http.Request {
+func cloneRequest(r *http.Request, authHeader *authHeader) *http.Request {
 	otherRequest := r.Clone(context.TODO())
 	otherRequest.Header = make(http.Header)

@ -293,10 +288,9 @@ func cloneRequest(r *http.Request, authHeader *AuthHeader) *http.Request {
 	return otherRequest
 }

-func (c *center) checkSign(authHeader *AuthHeader, box *accessbox.Box, request *http.Request, signatureDateTime time.Time) error {
+func (c *center) checkSign(authHeader *authHeader, box *accessbox.Box, request *http.Request, signatureDateTime time.Time) error {
 	awsCreds := credentials.NewStaticCredentials(authHeader.AccessKeyID, box.Gate.AccessKey, "")
 	signer := v4.NewSigner(awsCreds)
-	signer.DisableURIPathEscaping = true

 	var signature string
 	if authHeader.IsPresigned {
@ -312,6 +306,7 @@ func (c *center) checkSign(authHeader *AuthHeader, box *accessbox.Box, request *
 		}
 		signature = request.URL.Query().Get(AmzSignature)
 	} else {
+		signer.DisableURIPathEscaping = true
 		if _, err := signer.Sign(request, nil, authHeader.Service, authHeader.Region, signatureDateTime); err != nil {
 			return fmt.Errorf("failed to sign temporary HTTP request: %w", err)
 		}
--- a/api/auth/center_test.go
+++ b/api/auth/center_test.go
@ -5,7 +5,7 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"github.com/stretchr/testify/require"
 )

@ -19,12 +19,12 @@ func TestAuthHeaderParse(t *testing.T) {
 	for _, tc := range []struct {
 		header   string
 		err      error
-		expected *AuthHeader
+		expected *authHeader
 	}{
 		{
 			header: defaultHeader,
 			err:    nil,
-			expected: &AuthHeader{
+			expected: &authHeader{
 				AccessKeyID:  "oid0cid",
 				Service:      "s3",
 				Region:       "us-east-1",
@ -54,29 +54,29 @@ func TestAuthHeaderGetAddress(t *testing.T) {
 	defaulErr := errors.GetAPIError(errors.ErrInvalidAccessKeyID)

 	for _, tc := range []struct {
-		authHeader *AuthHeader
+		authHeader *authHeader
 		err        error
 	}{
 		{
-			authHeader: &AuthHeader{
+			authHeader: &authHeader{
 				AccessKeyID: "vWqF8cMDRbJcvnPLALoQGnABPPhw8NyYMcGsfDPfZJM0HrgjonN8CgFvCZ3kh9BUXw4W2tJ5E7EAGhueSF122HB",
 			},
 			err: nil,
 		},
 		{
-			authHeader: &AuthHeader{
+			authHeader: &authHeader{
 				AccessKeyID: "vWqF8cMDRbJcvnPLALoQGnABPPhw8NyYMcGsfDPfZJMHrgjonN8CgFvCZ3kh9BUXw4W2tJ5E7EAGhueSF122HB",
 			},
 			err: defaulErr,
 		},
 		{
-			authHeader: &AuthHeader{
+			authHeader: &authHeader{
 				AccessKeyID: "oid0cid",
 			},
 			err: defaulErr,
 		},
 		{
-			authHeader: &AuthHeader{
+			authHeader: &authHeader{
 				AccessKeyID: "oidcid",
 			},
 			err: defaulErr,
--- a/api/auth/presign.go
+++ b/api/auth/presign.go
@ -1,46 +0,0 @@
-package auth
-
-import (
-	"fmt"
-	"net/http"
-	"strings"
-	"time"
-
-	v4 "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth/signer/v4"
-	"github.com/aws/aws-sdk-go/aws/credentials"
-	"github.com/aws/aws-sdk-go/private/protocol/rest"
-)
-
-type RequestData struct {
-	Method   string
-	Endpoint string
-	Bucket   string
-	Object   string
-}
-
-type PresignData struct {
-	Service  string
-	Region   string
-	Lifetime time.Duration
-	SignTime time.Time
-}
-
-// PresignRequest forms pre-signed request to access objects without aws credentials.
-func PresignRequest(creds *credentials.Credentials, reqData RequestData, presignData PresignData) (*http.Request, error) {
-	urlStr := fmt.Sprintf("%s/%s/%s", reqData.Endpoint, rest.EscapePath(reqData.Bucket, false), rest.EscapePath(reqData.Object, false))
-	req, err := http.NewRequest(strings.ToUpper(reqData.Method), urlStr, nil)
-	if err != nil {
-		return nil, fmt.Errorf("failed to create new request: %w", err)
-	}
-
-	req.Header.Set(AmzDate, presignData.SignTime.Format("20060102T150405Z"))
-
-	signer := v4.NewSigner(creds)
-	signer.DisableURIPathEscaping = true
-
-	if _, err = signer.Presign(req, nil, presignData.Service, presignData.Region, presignData.Lifetime, presignData.SignTime); err != nil {
-		return nil, fmt.Errorf("presign: %w", err)
-	}
-
-	return req, nil
-}
--- a/api/auth/presign_test.go
+++ b/api/auth/presign_test.go
@ -1,95 +0,0 @@
-package auth
-
-import (
-	"context"
-	"strings"
-	"testing"
-	"time"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/tokens"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
-	"github.com/aws/aws-sdk-go/aws/credentials"
-	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/stretchr/testify/require"
-)
-
-var _ tokens.Credentials = (*credentialsMock)(nil)
-
-type credentialsMock struct {
-	boxes map[string]*accessbox.Box
-}
-
-func newTokensFrostfsMock() *credentialsMock {
-	return &credentialsMock{
-		boxes: make(map[string]*accessbox.Box),
-	}
-}
-
-func (m credentialsMock) addBox(addr oid.Address, box *accessbox.Box) {
-	m.boxes[addr.String()] = box
-}
-
-func (m credentialsMock) GetBox(_ context.Context, addr oid.Address) (*accessbox.Box, error) {
-	box, ok := m.boxes[addr.String()]
-	if !ok {
-		return nil, apistatus.ObjectNotFound{}
-	}
-
-	return box, nil
-}
-
-func (m credentialsMock) Put(context.Context, cid.ID, user.ID, *accessbox.AccessBox, uint64, ...*keys.PublicKey) (oid.Address, error) {
-	return oid.Address{}, nil
-}
-
-func (m credentialsMock) Update(context.Context, oid.Address, user.ID, *accessbox.AccessBox, uint64, ...*keys.PublicKey) (oid.Address, error) {
-	return oid.Address{}, nil
-}
-
-func TestCheckSign(t *testing.T) {
-	var accessKeyAddr oid.Address
-	err := accessKeyAddr.DecodeString("8N7CYBY74kxZXoyvA5UNdmovaXqFpwNfvEPsqaN81es2/3tDwq5tR8fByrJcyJwyiuYX7Dae8tyDT7pd8oaL1MBto")
-	require.NoError(t, err)
-
-	accessKeyID := strings.ReplaceAll(accessKeyAddr.String(), "/", "0")
-	secretKey := "713d0a0b9efc7d22923e17b0402a6a89b4273bc711c8bacb2da1b643d0006aeb"
-	awsCreds := credentials.NewStaticCredentials(accessKeyID, secretKey, "")
-
-	reqData := RequestData{
-		Method:   "GET",
-		Endpoint: "http://localhost:8084",
-		Bucket:   "my-bucket",
-		Object:   "@obj/name",
-	}
-	presignData := PresignData{
-		Service:  "s3",
-		Region:   "spb",
-		Lifetime: 10 * time.Minute,
-		SignTime: time.Now().UTC(),
-	}
-
-	req, err := PresignRequest(awsCreds, reqData, presignData)
-	require.NoError(t, err)
-
-	expBox := &accessbox.Box{
-		Gate: &accessbox.GateData{
-			AccessKey: secretKey,
-		},
-	}
-
-	mock := newTokensFrostfsMock()
-	mock.addBox(accessKeyAddr, expBox)
-
-	c := &center{
-		cli:     mock,
-		reg:     NewRegexpMatcher(authorizationFieldRegexp),
-		postReg: NewRegexpMatcher(postPolicyCredentialRegexp),
-	}
-	box, err := c.Authenticate(req)
-	require.NoError(t, err)
-	require.EqualValues(t, expBox, box.AccessBox)
-}
--- a/api/auth/signer/v4/v4.go
+++ b/api/auth/signer/v4/v4.go
@ -790,8 +790,6 @@ const doubleSpace = "  "

 // stripExcessSpaces will rewrite the passed in slice's string values to not
 // contain multiple side-by-side spaces.
-//
-//nolint:revive
 func stripExcessSpaces(vals []string) {
 	var j, k, l, m, spaces int
 	for i, str := range vals {
--- a/api/cache/access_control.go
+++ b/api/cache/access_control.go
@ -4,7 +4,7 @@ import (
 	"fmt"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/cache/accessbox.go
+++ b/api/cache/accessbox.go
@ -4,8 +4,8 @@ import (
 	"fmt"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/cache/buckets.go
+++ b/api/cache/buckets.go
@ -4,7 +4,7 @@ import (
 	"fmt"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/cache/cache_test.go
+++ b/api/cache/cache_test.go
@ -3,10 +3,10 @@ package cache
 import (
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
-	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	cidtest "github.com/TrueCloudLab/frostfs-sdk-go/container/id/test"
+	oidtest "github.com/TrueCloudLab/frostfs-sdk-go/object/id/test"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zaptest/observer"
--- a/api/cache/names.go
+++ b/api/cache/names.go
@ -4,7 +4,7 @@ import (
 	"fmt"
 	"time"

-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/cache/objects.go
+++ b/api/cache/objects.go
@ -4,8 +4,8 @@ import (
 	"fmt"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/cache/objects_test.go
+++ b/api/cache/objects_test.go
@ -4,9 +4,9 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	objecttest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/test"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	objecttest "github.com/TrueCloudLab/frostfs-sdk-go/object/test"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 )
--- a/api/cache/objectslist.go
+++ b/api/cache/objectslist.go
@ -6,8 +6,8 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/cache/objectslist_test.go
+++ b/api/cache/objectslist_test.go
@ -4,9 +4,9 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
-	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	cidtest "github.com/TrueCloudLab/frostfs-sdk-go/container/id/test"
+	oidtest "github.com/TrueCloudLab/frostfs-sdk-go/object/id/test"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 )
--- a/api/cache/system.go
+++ b/api/cache/system.go
@ -4,7 +4,7 @@ import (
 	"fmt"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
--- a/api/data/info.go
+++ b/api/data/info.go
@ -4,9 +4,9 @@ import (
 	"encoding/xml"
 	"time"

-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 )

 const (
@ -40,10 +40,9 @@ type (

 		Bucket      string
 		Name        string
-		Size          uint64
+		Size        int64
 		ContentType string
 		Created     time.Time
-		CreationEpoch uint64
 		HashSum     string
 		Owner       user.ID
 		Headers     map[string]string
@ -53,7 +52,7 @@ type (
 	NotificationInfo struct {
 		Name    string
 		Version string
-		Size    uint64
+		Size    int64
 		HashSum string
 	}

--- a/api/data/tree.go
+++ b/api/data/tree.go
@ -4,9 +4,9 @@ import (
 	"strconv"
 	"time"

-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 )

 const (
@ -18,7 +18,6 @@ type NodeVersion struct {
 	BaseNodeVersion
 	DeleteMarker  *DeleteMarkerInfo
 	IsUnversioned bool
-	IsCombined    bool
 }

 func (v NodeVersion) IsDeleteMarker() bool {
@ -54,7 +53,7 @@ type BaseNodeVersion struct {
 	ParenID   uint64
 	OID       oid.ID
 	Timestamp uint64
-	Size      uint64
+	Size      int64
 	ETag      string
 	FilePath  string
 }
@ -75,23 +74,23 @@ type MultipartInfo struct {
 	Owner        user.ID
 	Created      time.Time
 	Meta         map[string]string
-	CopiesNumbers []uint32
+	CopiesNumber uint32
 }

 // PartInfo is upload information about part.
 type PartInfo struct {
-	Key      string    `json:"key"`
-	UploadID string    `json:"uploadId"`
-	Number   int       `json:"number"`
-	OID      oid.ID    `json:"oid"`
-	Size     uint64    `json:"size"`
-	ETag     string    `json:"etag"`
-	Created  time.Time `json:"created"`
+	Key      string
+	UploadID string
+	Number   int
+	OID      oid.ID
+	Size     int64
+	ETag     string
+	Created  time.Time
 }

 // ToHeaderString form short part representation to use in S3-Completed-Parts header.
 func (p *PartInfo) ToHeaderString() string {
-	return strconv.Itoa(p.Number) + "-" + strconv.FormatUint(p.Size, 10) + "-" + p.ETag
+	return strconv.Itoa(p.Number) + "-" + strconv.FormatInt(p.Size, 10) + "-" + p.ETag
 }

 // LockInfo is lock information to create appropriate tree node.
--- a/api/errors/errors.go
+++ b/api/errors/errors.go
@ -3,8 +3,6 @@ package errors
 import (
 	"fmt"
 	"net/http"
-
-	frosterrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
 )

 type (
@ -177,10 +175,8 @@ const (
 	// Add new extended error codes here.
 	ErrInvalidObjectName
 	ErrOperationTimedOut
-	ErrGatewayTimeout
 	ErrOperationMaxedOut
 	ErrInvalidRequest
-	ErrInvalidRequestLargeCopy
 	ErrInvalidStorageClass

 	ErrMalformedJSON
@ -1128,12 +1124,6 @@ var errorCodes = errorCodeMap{
 		Description:    "A timeout occurred while trying to lock a resource, please reduce your request rate",
 		HTTPStatusCode: http.StatusServiceUnavailable,
 	},
-	ErrGatewayTimeout: {
-		ErrCode:        ErrGatewayTimeout,
-		Code:           "GatewayTimeout",
-		Description:    "The server is acting as a gateway and cannot get a response in time",
-		HTTPStatusCode: http.StatusGatewayTimeout,
-	},
 	ErrOperationMaxedOut: {
 		ErrCode:        ErrOperationMaxedOut,
 		Code:           "SlowDown",
@ -1162,12 +1152,6 @@ var errorCodes = errorCodeMap{
 		Description:    "Invalid Request",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
-	ErrInvalidRequestLargeCopy: {
-		ErrCode:        ErrInvalidRequestLargeCopy,
-		Code:           "InvalidRequest",
-		Description:    "CopyObject request made on objects larger than 5GB in size.",
-		HTTPStatusCode: http.StatusBadRequest,
-	},
 	ErrIncorrectContinuationToken: {
 		ErrCode:        ErrIncorrectContinuationToken,
 		Code:           "InvalidArgument",
@ -1709,7 +1693,6 @@ var errorCodes = errorCodeMap{

 // IsS3Error checks if the provided error is a specific s3 error.
 func IsS3Error(err error, code ErrorCode) bool {
-	err = frosterrors.UnwrapErr(err)
 	e, ok := err.(Error)
 	return ok && e.ErrCode == code
 }
--- a/api/handler/acl.go
+++ b/api/handler/acl.go
@ -14,16 +14,15 @@ import (
 	"strconv"
 	"strings"

-	v2acl "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/acl"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	v2acl "github.com/TrueCloudLab/frostfs-api-go/v2/acl"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"go.uber.org/zap"
 )
@ -159,93 +158,8 @@ func (s ServiceRecord) ToEACLRecord() *eacl.Record {
 	return serviceRecord
 }

-var (
-	errInvalidStatement = stderrors.New("invalid statement")
-	errInvalidPrincipal = stderrors.New("invalid principal")
-)
-
-func (s *statement) UnmarshalJSON(data []byte) error {
-	var statementMap map[string]interface{}
-	if err := json.Unmarshal(data, &statementMap); err != nil {
-		return err
-	}
-
-	sidField, ok := statementMap["Sid"]
-	if ok {
-		if s.Sid, ok = sidField.(string); !ok {
-			return errInvalidStatement
-		}
-	}
-
-	effectField, ok := statementMap["Effect"]
-	if ok {
-		if s.Effect, ok = effectField.(string); !ok {
-			return errInvalidStatement
-		}
-	}
-
-	principalField, ok := statementMap["Principal"]
-	if ok {
-		principalMap, ok := principalField.(map[string]interface{})
-		if !ok {
-			return errInvalidPrincipal
-		}
-
-		awsField, ok := principalMap["AWS"]
-		if ok {
-			if s.Principal.AWS, ok = awsField.(string); !ok {
-				return fmt.Errorf("%w: 'AWS' field must be string", errInvalidPrincipal)
-			}
-		}
-
-		canonicalUserField, ok := principalMap["CanonicalUser"]
-		if ok {
-			if s.Principal.CanonicalUser, ok = canonicalUserField.(string); !ok {
-				return errInvalidPrincipal
-			}
-		}
-	}
-
-	actionField, ok := statementMap["Action"]
-	if ok {
-		switch actionField := actionField.(type) {
-		case []interface{}:
-			s.Action = make([]string, len(actionField))
-			for i, action := range actionField {
-				if s.Action[i], ok = action.(string); !ok {
-					return errInvalidStatement
-				}
-			}
-		case string:
-			s.Action = []string{actionField}
-		default:
-			return errInvalidStatement
-		}
-	}
-
-	resourceField, ok := statementMap["Resource"]
-	if ok {
-		switch resourceField := resourceField.(type) {
-		case []interface{}:
-			s.Resource = make([]string, len(resourceField))
-			for i, action := range resourceField {
-				if s.Resource[i], ok = action.(string); !ok {
-					return errInvalidStatement
-				}
-			}
-		case string:
-			s.Resource = []string{resourceField}
-		default:
-			return errInvalidStatement
-		}
-	}
-
-	return nil
-}
-
 func (h *handler) GetBucketACLHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -253,13 +167,13 @@ func (h *handler) GetBucketACLHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	bucketACL, err := h.obj.GetBucketACL(ctx, bktInfo)
+	bucketACL, err := h.obj.GetBucketACL(r.Context(), bktInfo)
 	if err != nil {
 		h.logAndSendError(w, "could not fetch bucket acl", reqInfo, err)
 		return
 	}

-	if err = middleware.EncodeToResponse(w, h.encodeBucketACL(ctx, bktInfo.Name, bucketACL)); err != nil {
+	if err = api.EncodeToResponse(w, h.encodeBucketACL(bktInfo.Name, bucketACL)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 		return
 	}
@ -283,7 +197,7 @@ func (h *handler) bearerTokenIssuerKey(ctx context.Context) (*keys.PublicKey, er
 }

 func (h *handler) PutBucketACLHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	key, err := h.bearerTokenIssuerKey(r.Context())
 	if err != nil {
 		h.logAndSendError(w, "couldn't get bearer token issuer key", reqInfo, err)
@ -367,8 +281,7 @@ func (h *handler) updateBucketACL(r *http.Request, astChild *ast, bktInfo *data.
 }

 func (h *handler) GetObjectACLHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -376,7 +289,7 @@ func (h *handler) GetObjectACLHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	bucketACL, err := h.obj.GetBucketACL(ctx, bktInfo)
+	bucketACL, err := h.obj.GetBucketACL(r.Context(), bktInfo)
 	if err != nil {
 		h.logAndSendError(w, "could not fetch bucket acl", reqInfo, err)
 		return
@ -388,28 +301,27 @@ func (h *handler) GetObjectACLHandler(w http.ResponseWriter, r *http.Request) {
 		VersionID: reqInfo.URL.Query().Get(api.QueryVersionID),
 	}

-	objInfo, err := h.obj.GetObjectInfo(ctx, prm)
+	objInfo, err := h.obj.GetObjectInfo(r.Context(), prm)
 	if err != nil {
 		h.logAndSendError(w, "could not object info", reqInfo, err)
 		return
 	}

-	if err = middleware.EncodeToResponse(w, h.encodeObjectACL(ctx, bucketACL, reqInfo.BucketName, objInfo.VersionID())); err != nil {
+	if err = api.EncodeToResponse(w, h.encodeObjectACL(bucketACL, reqInfo.BucketName, objInfo.VersionID())); err != nil {
 		h.logAndSendError(w, "failed to encode response", reqInfo, err)
 	}
 }

 func (h *handler) PutObjectACLHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())
 	versionID := reqInfo.URL.Query().Get(api.QueryVersionID)
-	key, err := h.bearerTokenIssuerKey(ctx)
+	key, err := h.bearerTokenIssuerKey(r.Context())
 	if err != nil {
 		h.logAndSendError(w, "couldn't get gate key", reqInfo, err)
 		return
 	}

-	token, err := getSessionTokenSetEACL(ctx)
+	token, err := getSessionTokenSetEACL(r.Context())
 	if err != nil {
 		h.logAndSendError(w, "couldn't get eacl token", reqInfo, err)
 		return
@ -427,7 +339,7 @@ func (h *handler) PutObjectACLHandler(w http.ResponseWriter, r *http.Request) {
 		VersionID: versionID,
 	}

-	objInfo, err := h.obj.GetObjectInfo(ctx, p)
+	objInfo, err := h.obj.GetObjectInfo(r.Context(), p)
 	if err != nil {
 		h.logAndSendError(w, "could not get object info", reqInfo, err)
 		return
@ -469,15 +381,15 @@ func (h *handler) PutObjectACLHandler(w http.ResponseWriter, r *http.Request) {
 			BktInfo:          bktInfo,
 			ReqInfo:          reqInfo,
 		}
-		if err = h.sendNotifications(ctx, s); err != nil {
-			h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+		if err = h.sendNotifications(r.Context(), s); err != nil {
+			h.log.Error("couldn't send notification: %w", zap.Error(err))
 		}
 	}
 	w.WriteHeader(http.StatusOK)
 }

 func (h *handler) GetBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -508,14 +420,14 @@ func checkOwner(info *data.BucketInfo, owner string) error {

 	// may need to convert owner to appropriate format
 	if info.Owner.String() != owner {
-		return fmt.Errorf("%w: mismatch owner", errors.GetAPIError(errors.ErrAccessDenied))
+		return errors.GetAPIError(errors.ErrAccessDenied)
 	}

 	return nil
 }

 func (h *handler) PutBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -1414,7 +1326,7 @@ func isWriteOperation(op eacl.Operation) bool {
 	return op == eacl.OperationDelete || op == eacl.OperationPut
 }

-func (h *handler) encodeObjectACL(ctx context.Context, bucketACL *layer.BucketACL, bucketName, objectVersion string) *AccessControlPolicy {
+func (h *handler) encodeObjectACL(bucketACL *layer.BucketACL, bucketName, objectVersion string) *AccessControlPolicy {
 	res := &AccessControlPolicy{
 		Owner: Owner{
 			ID:          bucketACL.Info.Owner.String(),
@ -1460,7 +1372,7 @@ func (h *handler) encodeObjectACL(ctx context.Context, bucketACL *layer.BucketAC
 		if read {
 			permission = aclFullControl
 		} else {
-			h.reqLogger(ctx).Warn("some acl not fully mapped")
+			h.log.Warn("some acl not fully mapped")
 		}

 		var grantee *Grantee
@ -1482,8 +1394,8 @@ func (h *handler) encodeObjectACL(ctx context.Context, bucketACL *layer.BucketAC
 	return res
 }

-func (h *handler) encodeBucketACL(ctx context.Context, bucketName string, bucketACL *layer.BucketACL) *AccessControlPolicy {
-	return h.encodeObjectACL(ctx, bucketACL, bucketName, "")
+func (h *handler) encodeBucketACL(bucketName string, bucketACL *layer.BucketACL) *AccessControlPolicy {
+	return h.encodeObjectACL(bucketACL, bucketName, "")
 }

 func contains(list []eacl.Operation, op eacl.Operation) bool {
--- a/api/handler/acl_test.go
+++ b/api/handler/acl_test.go
@ -11,19 +11,16 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"net/http/httptest"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/stretchr/testify/require"
 )
@ -1355,85 +1352,6 @@ func TestBucketPolicy(t *testing.T) {
 	}
 }

-func TestBucketPolicyUnmarshal(t *testing.T) {
-	for _, tc := range []struct {
-		name   string
-		policy string
-	}{
-		{
-			name: "action/resource array",
-			policy: `
-{
-	"Version": "2012-10-17",
-	"Statement": [{
-		"Principal": {
-			"AWS": "arn:aws:iam::111122223333:role/JohnDoe"
-		},
-		"Effect": "Allow",
-		"Action": [
-			"s3:GetObject",
-			"s3:GetObjectVersion"
-		],
-		"Resource": [
-			"arn:aws:s3:::DOC-EXAMPLE-BUCKET/*",
-			"arn:aws:s3:::DOC-EXAMPLE-BUCKET2/*"
-		]
-	}]
-}
-`,
-		},
-		{
-			name: "action/resource string",
-			policy: `
-{
-	"Version": "2012-10-17",
-	"Statement": [{
-		"Principal": {
-			"AWS": "arn:aws:iam::111122223333:role/JohnDoe"
-		},
-		"Effect": "Deny",
-		"Action": "s3:GetObject",
-		"Resource": "arn:aws:s3:::DOC-EXAMPLE-BUCKET/*"
-	}]
-}
-`,
-		},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			bktPolicy := &bucketPolicy{}
-			err := json.Unmarshal([]byte(tc.policy), bktPolicy)
-			require.NoError(t, err)
-		})
-	}
-}
-
-func TestPutBucketPolicy(t *testing.T) {
-	bktPolicy := `
-{
-	"Version": "2012-10-17",
-	"Statement": [{
-		"Principal": {
-			"AWS": "*"
-		},
-		"Effect": "Deny",
-		"Action": "s3:GetObject",
-		"Resource": "arn:aws:s3:::bucket-for-policy/*"
-	}]
-}
-`
-	hc := prepareHandlerContext(t)
-	bktName := "bucket-for-policy"
-
-	box, _ := createAccessBox(t)
-	createBucket(t, hc, bktName, box)
-
-	w, r := prepareTestPayloadRequest(hc, bktName, "", bytes.NewReader([]byte(bktPolicy)))
-	ctx := context.WithValue(r.Context(), middleware.BoxData, box)
-	r = r.WithContext(ctx)
-	hc.Handler().PutBucketPolicyHandler(w, r)
-	assertStatus(hc.t, w, http.StatusOK)
-}
-
 func getBucketPolicy(hc *handlerContext, bktName string) *bucketPolicy {
 	w, r := prepareTestRequest(hc, bktName, "", nil)
 	hc.Handler().GetBucketPolicyHandler(w, r)
@ -1450,7 +1368,7 @@ func putBucketPolicy(hc *handlerContext, bktName string, bktPolicy *bucketPolicy
 	require.NoError(hc.t, err)

 	w, r := prepareTestPayloadRequest(hc, bktName, "", bytes.NewReader(body))
-	ctx := context.WithValue(r.Context(), middleware.BoxData, box)
+	ctx := context.WithValue(r.Context(), api.BoxData, box)
 	r = r.WithContext(ctx)
 	hc.Handler().PutBucketPolicyHandler(w, r)
 	assertStatus(hc.t, w, status)
@ -1483,14 +1401,9 @@ func createAccessBox(t *testing.T) (*accessbox.Box, *keys.PrivateKey) {

 	tok := new(session.Container)
 	tok.ForVerb(session.VerbContainerSetEACL)
-	err = tok.Sign(key.PrivateKey)
-	require.NoError(t, err)

 	tok2 := new(session.Container)
 	tok2.ForVerb(session.VerbContainerPut)
-	err = tok2.Sign(key.PrivateKey)
-	require.NoError(t, err)
-
 	box := &accessbox.Box{
 		Gate: &accessbox.GateData{
 			SessionTokens: []*session.Container{tok, tok2},
@ -1501,34 +1414,24 @@ func createAccessBox(t *testing.T) (*accessbox.Box, *keys.PrivateKey) {
 	return box, key
 }

-func createBucket(t *testing.T, hc *handlerContext, bktName string, box *accessbox.Box) *data.BucketInfo {
-	w := createBucketBase(hc, bktName, box)
+func createBucket(t *testing.T, tc *handlerContext, bktName string, box *accessbox.Box) *data.BucketInfo {
+	w, r := prepareTestRequest(tc, bktName, "", nil)
+	ctx := context.WithValue(r.Context(), api.BoxData, box)
+	r = r.WithContext(ctx)
+	tc.Handler().CreateBucketHandler(w, r)
 	assertStatus(t, w, http.StatusOK)

-	bktInfo, err := hc.Layer().GetBucketInfo(hc.Context(), bktName)
+	bktInfo, err := tc.Layer().GetBucketInfo(tc.Context(), bktName)
 	require.NoError(t, err)
 	return bktInfo
 }

-func createBucketAssertS3Error(hc *handlerContext, bktName string, box *accessbox.Box, code s3errors.ErrorCode) {
-	w := createBucketBase(hc, bktName, box)
-	assertS3Error(hc.t, w, s3errors.GetAPIError(code))
-}
-
-func createBucketBase(hc *handlerContext, bktName string, box *accessbox.Box) *httptest.ResponseRecorder {
-	w, r := prepareTestRequest(hc, bktName, "", nil)
-	ctx := context.WithValue(r.Context(), middleware.BoxData, box)
-	r = r.WithContext(ctx)
-	hc.Handler().CreateBucketHandler(w, r)
-	return w
-}
-
 func putBucketACL(t *testing.T, tc *handlerContext, bktName string, box *accessbox.Box, header map[string]string) {
 	w, r := prepareTestRequest(tc, bktName, "", nil)
 	for key, val := range header {
 		r.Header.Set(key, val)
 	}
-	ctx := context.WithValue(r.Context(), middleware.BoxData, box)
+	ctx := context.WithValue(r.Context(), api.BoxData, box)
 	r = r.WithContext(ctx)
 	tc.Handler().PutBucketACLHandler(w, r)
 	assertStatus(t, w, http.StatusOK)
--- a/api/handler/api.go
+++ b/api/handler/api.go
@ -1,17 +1,12 @@
 package handler

 import (
-	"encoding/xml"
 	"errors"
-	"fmt"
-	"io"
-	"strconv"
-	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/netmap"
 	"go.uber.org/zap"
 )

@ -31,28 +26,16 @@ type (
 	// Config contains data which handler needs to keep.
 	Config struct {
 		Policy             PlacementPolicy
-		XMLDecoder                 XMLDecoderProvider
 		DefaultMaxAge      int
 		NotificatorEnabled bool
+		CopiesNumber       uint32
 		ResolveZoneList    []string
 		IsResolveListAllow bool // True if ResolveZoneList contains allowed zones
-		CompleteMultipartKeepalive time.Duration
-		Kludge                     KludgeSettings
 	}

 	PlacementPolicy interface {
-		DefaultPlacementPolicy() netmap.PlacementPolicy
-		PlacementPolicy(string) (netmap.PlacementPolicy, bool)
-		CopiesNumbers(string) ([]uint32, bool)
-		DefaultCopiesNumbers() []uint32
-	}
-
-	XMLDecoderProvider interface {
-		NewCompleteMultipartDecoder(io.Reader) *xml.Decoder
-	}
-
-	KludgeSettings interface {
-		BypassContentEncodingInChunks() bool
+		Default() netmap.PlacementPolicy
+		Get(string) (netmap.PlacementPolicy, bool)
 	}
 )

@ -87,44 +70,3 @@ func New(log *zap.Logger, obj layer.Client, notificator Notificator, cfg *Config
 		notificator: notificator,
 	}, nil
 }
-
-// pickCopiesNumbers chooses the return values following this logic:
-// 1) array of copies numbers sent in request's header has the highest priority.
-// 2) array of copies numbers with corresponding location constraint provided in the config file.
-// 3) default copies number from the config file wrapped into array.
-func (h *handler) pickCopiesNumbers(metadata map[string]string, locationConstraint string) ([]uint32, error) {
-	copiesNumbersStr, ok := metadata[layer.AttributeFrostfsCopiesNumber]
-	if ok {
-		result, err := parseCopiesNumbers(copiesNumbersStr)
-		if err != nil {
-			return nil, err
-		}
-		return result, nil
-	}
-
-	copiesNumbers, ok := h.cfg.Policy.CopiesNumbers(locationConstraint)
-	if ok {
-		return copiesNumbers, nil
-	}
-
-	return h.cfg.Policy.DefaultCopiesNumbers(), nil
-}
-
-func parseCopiesNumbers(copiesNumbersStr string) ([]uint32, error) {
-	var result []uint32
-	copiesNumbersSplit := strings.Split(copiesNumbersStr, ",")
-
-	for i := range copiesNumbersSplit {
-		item := strings.ReplaceAll(copiesNumbersSplit[i], " ", "")
-		if len(item) == 0 {
-			continue
-		}
-		copiesNumber, err := strconv.ParseUint(item, 10, 32)
-		if err != nil {
-			return nil, fmt.Errorf("pasrse copies number: %w", err)
-		}
-		result = append(result, uint32(copiesNumber))
-	}
-
-	return result, nil
-}
--- a/api/handler/api_test.go
+++ b/api/handler/api_test.go
@ -1,71 +0,0 @@
-package handler
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/require"
-)
-
-func TestCopiesNumberPicker(t *testing.T) {
-	var locationConstraints = map[string][]uint32{}
-	locationConstraint1 := "one"
-	locationConstraint2 := "two"
-	locationConstraints[locationConstraint1] = []uint32{2, 3, 4}
-
-	config := &Config{
-		Policy: &placementPolicyMock{
-			copiesNumbers:        locationConstraints,
-			defaultCopiesNumbers: []uint32{1},
-		},
-	}
-	h := handler{
-		cfg: config,
-	}
-
-	metadata := map[string]string{}
-
-	t.Run("pick default copies number", func(t *testing.T) {
-		metadata["somekey1"] = "5, 6, 7"
-		expectedCopiesNumbers := []uint32{1}
-
-		actualCopiesNumbers, err := h.pickCopiesNumbers(metadata, locationConstraint2)
-		require.NoError(t, err)
-		require.Equal(t, expectedCopiesNumbers, actualCopiesNumbers)
-	})
-
-	t.Run("pick copies number vector according to location constraint", func(t *testing.T) {
-		metadata["somekey2"] = "6, 7, 8"
-		expectedCopiesNumbers := []uint32{2, 3, 4}
-
-		actualCopiesNumbers, err := h.pickCopiesNumbers(metadata, locationConstraint1)
-		require.NoError(t, err)
-		require.Equal(t, expectedCopiesNumbers, actualCopiesNumbers)
-	})
-
-	t.Run("pick copies number from metadata", func(t *testing.T) {
-		metadata["frostfs-copies-number"] = "7, 8, 9"
-		expectedCopiesNumbers := []uint32{7, 8, 9}
-
-		actualCopiesNumbers, err := h.pickCopiesNumbers(metadata, locationConstraint2)
-		require.NoError(t, err)
-		require.Equal(t, expectedCopiesNumbers, actualCopiesNumbers)
-	})
-
-	t.Run("pick copies number from metadata with no space", func(t *testing.T) {
-		metadata["frostfs-copies-number"] = "7,8,9"
-		expectedCopiesNumbers := []uint32{7, 8, 9}
-
-		actualCopiesNumbers, err := h.pickCopiesNumbers(metadata, locationConstraint2)
-		require.NoError(t, err)
-		require.Equal(t, expectedCopiesNumbers, actualCopiesNumbers)
-	})
-
-	t.Run("pick copies number from metadata with trailing comma", func(t *testing.T) {
-		metadata["frostfs-copies-number"] = "11, 12, 13, "
-		expectedCopiesNumbers := []uint32{11, 12, 13}
-
-		actualCopiesNumbers, err := h.pickCopiesNumbers(metadata, locationConstraint2)
-		require.NoError(t, err)
-		require.Equal(t, expectedCopiesNumbers, actualCopiesNumbers)
-	})
-}
--- a/api/handler/attributes.go
+++ b/api/handler/attributes.go
@ -6,11 +6,10 @@ import (
 	"strconv"
 	"strings"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"go.uber.org/zap"
 )

@ -18,7 +17,7 @@ type (
 	GetObjectAttributesResponse struct {
 		ETag         string       `xml:"ETag,omitempty"`
 		Checksum     *Checksum    `xml:"Checksum,omitempty"`
-		ObjectSize   uint64       `xml:"ObjectSize,omitempty"`
+		ObjectSize   int64        `xml:"ObjectSize,omitempty"`
 		StorageClass string       `xml:"StorageClass,omitempty"`
 		ObjectParts  *ObjectParts `xml:"ObjectParts,omitempty"`
 	}
@ -68,7 +67,7 @@ var validAttributes = map[string]struct{}{
 }

 func (h *handler) GetObjectAttributesHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	params, err := parseGetObjectAttributeArgs(r)
 	if err != nil {
@ -124,7 +123,7 @@ func (h *handler) GetObjectAttributesHandler(w http.ResponseWriter, r *http.Requ
 	}

 	writeAttributesHeaders(w.Header(), extendedInfo, bktSettings.Unversioned())
-	if err = middleware.EncodeToResponse(w, response); err != nil {
+	if err = api.EncodeToResponse(w, response); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }
--- a/api/handler/attributes_test.go
+++ b/api/handler/attributes_test.go
@ -4,7 +4,7 @@ import (
 	"strings"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
 	"github.com/stretchr/testify/require"
 )

--- a/api/handler/copy.go
+++ b/api/handler/copy.go
@ -6,13 +6,12 @@ import (
 	"regexp"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/auth"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"go.uber.org/zap"
 )

@ -47,8 +46,7 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 		tagSet           map[string]string
 		sessionTokenEACL *session.Container

-		ctx     = r.Context()
-		reqInfo = middleware.GetReqInfo(ctx)
+		reqInfo = api.GetReqInfo(r.Context())

 		containsACL = containsACLHeaders(r)
 	)
@ -86,45 +84,26 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	settings, err := h.obj.GetBucketSettings(ctx, dstBktInfo)
+	settings, err := h.obj.GetBucketSettings(r.Context(), dstBktInfo)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket settings", reqInfo, err)
 		return
 	}

 	if containsACL {
-		if sessionTokenEACL, err = getSessionTokenSetEACL(ctx); err != nil {
+		if sessionTokenEACL, err = getSessionTokenSetEACL(r.Context()); err != nil {
 			h.logAndSendError(w, "could not get eacl session token from a box", reqInfo, err)
 			return
 		}
 	}

-	extendedSrcObjInfo, err := h.obj.GetExtendedObjectInfo(ctx, srcObjPrm)
+	extendedSrcObjInfo, err := h.obj.GetExtendedObjectInfo(r.Context(), srcObjPrm)
 	if err != nil {
 		h.logAndSendError(w, "could not find object", reqInfo, err)
 		return
 	}
 	srcObjInfo := extendedSrcObjInfo.ObjectInfo

-	encryptionParams, err := formEncryptionParams(r)
-	if err != nil {
-		h.logAndSendError(w, "invalid sse headers", reqInfo, err)
-		return
-	}
-
-	if err = encryptionParams.MatchObjectEncryption(layer.FormEncryptionInfo(srcObjInfo.Headers)); err != nil {
-		h.logAndSendError(w, "encryption doesn't match object", reqInfo, errors.GetAPIError(errors.ErrBadRequest), zap.Error(err))
-		return
-	}
-
-	if srcSize, err := getObjectSize(extendedSrcObjInfo, encryptionParams); err != nil {
-		h.logAndSendError(w, "failed to get source object size", reqInfo, err)
-		return
-	} else if srcSize > layer.UploadMaxSize { //https://docs.aws.amazon.com/AmazonS3/latest/API/API_CopyObject.html
-		h.logAndSendError(w, "too bid object to copy with single copy operation, use multipart upload copy instead", reqInfo, errors.GetAPIError(errors.ErrInvalidRequestLargeCopy))
-		return
-	}
-
 	args, err := parseCopyObjectArgs(r.Header)
 	if err != nil {
 		h.logAndSendError(w, "could not parse request params", reqInfo, err)
@ -156,13 +135,24 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 			NodeVersion: extendedSrcObjInfo.NodeVersion,
 		}

-		_, tagSet, err = h.obj.GetObjectTagging(ctx, tagPrm)
+		_, tagSet, err = h.obj.GetObjectTagging(r.Context(), tagPrm)
 		if err != nil {
 			h.logAndSendError(w, "could not get object tagging", reqInfo, err)
 			return
 		}
 	}

+	encryptionParams, err := formEncryptionParams(r)
+	if err != nil {
+		h.logAndSendError(w, "invalid sse headers", reqInfo, err)
+		return
+	}
+
+	if err = encryptionParams.MatchObjectEncryption(layer.FormEncryptionInfo(srcObjInfo.Headers)); err != nil {
+		h.logAndSendError(w, "encryption doesn't match object", reqInfo, errors.GetAPIError(errors.ErrBadRequest), zap.Error(err))
+		return
+	}
+
 	if err = checkPreconditions(srcObjInfo, args.Conditional); err != nil {
 		h.logAndSendError(w, "precondition failed", reqInfo, errors.GetAPIError(errors.ErrPreconditionFailed))
 		return
@ -172,14 +162,18 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 		if len(srcObjInfo.ContentType) > 0 {
 			srcObjInfo.Headers[api.ContentType] = srcObjInfo.ContentType
 		}
-		metadata = makeCopyMap(srcObjInfo.Headers)
-		delete(metadata, layer.MultipartObjectSize) // object payload will be real one rather than list of compound parts
+		metadata = srcObjInfo.Headers
 	} else if contentType := r.Header.Get(api.ContentType); len(contentType) > 0 {
 		metadata[api.ContentType] = contentType
 	}

+	copiesNumber, err := getCopiesNumberOrDefault(metadata, h.cfg.CopiesNumber)
+	if err != nil {
+		h.logAndSendError(w, "invalid copies number", reqInfo, err)
+		return
+	}
+
 	params := &layer.CopyObjectParams{
-		SrcVersioned: srcObjPrm.Versioned(),
 		SrcObject:   srcObjInfo,
 		ScrBktInfo:  srcObjPrm.BktInfo,
 		DstBktInfo:  dstBktInfo,
@ -187,29 +181,24 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 		SrcSize:     srcObjInfo.Size,
 		Header:      metadata,
 		Encryption:  encryptionParams,
+		CopiesNuber: copiesNumber,
 	}

-	params.CopiesNumbers, err = h.pickCopiesNumbers(metadata, dstBktInfo.LocationConstraint)
-	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err)
-		return
-	}
-
-	params.Lock, err = formObjectLock(ctx, dstBktInfo, settings.LockConfiguration, r.Header)
+	params.Lock, err = formObjectLock(r.Context(), dstBktInfo, settings.LockConfiguration, r.Header)
 	if err != nil {
 		h.logAndSendError(w, "could not form object lock", reqInfo, err)
 		return
 	}

 	additional := []zap.Field{zap.String("src_bucket_name", srcBucket), zap.String("src_object_name", srcObject)}
-	extendedDstObjInfo, err := h.obj.CopyObject(ctx, params)
+	extendedDstObjInfo, err := h.obj.CopyObject(r.Context(), params)
 	if err != nil {
 		h.logAndSendError(w, "couldn't copy object", reqInfo, err, additional...)
 		return
 	}
 	dstObjInfo := extendedDstObjInfo.ObjectInfo

-	if err = middleware.EncodeToResponse(w, &CopyObjectResponse{LastModified: dstObjInfo.Created.UTC().Format(time.RFC3339), ETag: dstObjInfo.HashSum}); err != nil {
+	if err = api.EncodeToResponse(w, &CopyObjectResponse{LastModified: dstObjInfo.Created.UTC().Format(time.RFC3339), ETag: dstObjInfo.HashSum}); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err, additional...)
 		return
 	}
@ -227,7 +216,7 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 			SessionToken: sessionTokenEACL,
 		}

-		if err = h.obj.PutBucketACL(ctx, p); err != nil {
+		if err = h.obj.PutBucketACL(r.Context(), p); err != nil {
 			h.logAndSendError(w, "could not put bucket acl", reqInfo, err)
 			return
 		}
@ -243,13 +232,16 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 			TagSet:      tagSet,
 			NodeVersion: extendedDstObjInfo.NodeVersion,
 		}
-		if _, err = h.obj.PutObjectTagging(ctx, tagPrm); err != nil {
+		if _, err = h.obj.PutObjectTagging(r.Context(), tagPrm); err != nil {
 			h.logAndSendError(w, "could not upload object tagging", reqInfo, err)
 			return
 		}
 	}

-	h.reqLogger(ctx).Info("object is copied", zap.Stringer("object_id", dstObjInfo.ID))
+	h.log.Info("object is copied",
+		zap.String("bucket", dstObjInfo.Bucket),
+		zap.String("object", dstObjInfo.Name),
+		zap.Stringer("object_id", dstObjInfo.ID))

 	s := &SendNotificationParams{
 		Event:            EventObjectCreatedCopy,
@ -257,8 +249,8 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 		BktInfo:          dstBktInfo,
 		ReqInfo:          reqInfo,
 	}
-	if err = h.sendNotifications(ctx, s); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), s); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

 	if encryptionParams.Enabled() {
@ -266,15 +258,7 @@ func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
 	}
 }

-func makeCopyMap(headers map[string]string) map[string]string {
-	res := make(map[string]string, len(headers))
-	for key, val := range headers {
-		res[key] = val
-	}
-	return res
-}
-
-func isCopyingToItselfForbidden(reqInfo *middleware.ReqInfo, srcBucket string, srcObject string, settings *data.BucketSettings, args *copyObjectArgs) bool {
+func isCopyingToItselfForbidden(reqInfo *api.ReqInfo, srcBucket string, srcObject string, settings *data.BucketSettings, args *copyObjectArgs) bool {
 	if reqInfo.BucketName != srcBucket || reqInfo.ObjectName != srcObject {
 		return false
 	}
--- a/api/handler/copy_test.go
+++ b/api/handler/copy_test.go
@ -6,8 +6,7 @@ import (
 	"net/url"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
 	"github.com/stretchr/testify/require"
 )

@ -30,14 +29,14 @@ func TestCopyWithTaggingDirective(t *testing.T) {
 	copyMeta := CopyMeta{
 		Tags: map[string]string{"key2": "val"},
 	}
-	copyObject(tc, bktName, objName, objToCopy, copyMeta, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objToCopy, copyMeta, http.StatusOK)
 	tagging := getObjectTagging(t, tc, bktName, objToCopy, emptyVersion)
 	require.Len(t, tagging.TagSet, 1)
 	require.Equal(t, "key", tagging.TagSet[0].Key)
 	require.Equal(t, "val", tagging.TagSet[0].Value)

 	copyMeta.TaggingDirective = replaceDirective
-	copyObject(tc, bktName, objName, objToCopy2, copyMeta, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objToCopy2, copyMeta, http.StatusOK)
 	tagging = getObjectTagging(t, tc, bktName, objToCopy2, emptyVersion)
 	require.Len(t, tagging.TagSet, 1)
 	require.Equal(t, "key2", tagging.TagSet[0].Key)
@ -52,54 +51,20 @@ func TestCopyToItself(t *testing.T) {

 	copyMeta := CopyMeta{MetadataDirective: replaceDirective}

-	copyObject(tc, bktName, objName, objName, CopyMeta{}, http.StatusBadRequest)
-	copyObject(tc, bktName, objName, objName, copyMeta, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objName, CopyMeta{}, http.StatusBadRequest)
+	copyObject(t, tc, bktName, objName, objName, copyMeta, http.StatusOK)

 	putBucketVersioning(t, tc, bktName, true)
-	copyObject(tc, bktName, objName, objName, CopyMeta{}, http.StatusOK)
-	copyObject(tc, bktName, objName, objName, copyMeta, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objName, CopyMeta{}, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objName, copyMeta, http.StatusOK)

 	putBucketVersioning(t, tc, bktName, false)
-	copyObject(tc, bktName, objName, objName, CopyMeta{}, http.StatusOK)
-	copyObject(tc, bktName, objName, objName, copyMeta, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objName, CopyMeta{}, http.StatusOK)
+	copyObject(t, tc, bktName, objName, objName, copyMeta, http.StatusOK)
 }

-func TestCopyMultipart(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-copy", "object-for-copy"
-	createTestBucket(hc, bktName)
-
-	partSize := layer.UploadMinSize
-	objLen := 6 * partSize
-	headers := map[string]string{}
-
-	data := multipartUpload(hc, bktName, objName, headers, objLen, partSize)
-	require.Equal(t, objLen, len(data))
-
-	objToCopy := "copy-target"
-	var copyMeta CopyMeta
-	copyObject(hc, bktName, objName, objToCopy, copyMeta, http.StatusOK)
-
-	copiedData, _ := getObject(hc, bktName, objToCopy)
-	equalDataSlices(t, data, copiedData)
-
-	result := getObjectAttributes(hc, bktName, objToCopy, objectParts)
-	require.NotNil(t, result.ObjectParts)
-
-	objToCopy2 := "copy-target2"
-	copyMeta.MetadataDirective = replaceDirective
-	copyObject(hc, bktName, objName, objToCopy2, copyMeta, http.StatusOK)
-
-	result = getObjectAttributes(hc, bktName, objToCopy2, objectParts)
-	require.Nil(t, result.ObjectParts)
-
-	copiedData, _ = getObject(hc, bktName, objToCopy2)
-	equalDataSlices(t, data, copiedData)
-}
-
-func copyObject(hc *handlerContext, bktName, fromObject, toObject string, copyMeta CopyMeta, statusCode int) {
-	w, r := prepareTestRequest(hc, bktName, toObject, nil)
+func copyObject(t *testing.T, tc *handlerContext, bktName, fromObject, toObject string, copyMeta CopyMeta, statusCode int) {
+	w, r := prepareTestRequest(tc, bktName, toObject, nil)
 	r.Header.Set(api.AmzCopySource, bktName+"/"+fromObject)

 	r.Header.Set(api.AmzMetadataDirective, copyMeta.MetadataDirective)
@ -114,8 +79,8 @@ func copyObject(hc *handlerContext, bktName, fromObject, toObject string, copyMe
 	}
 	r.Header.Set(api.AmzTagging, tagsQuery.Encode())

-	hc.Handler().CopyObjectHandler(w, r)
-	assertStatus(hc.t, w, statusCode)
+	tc.Handler().CopyObjectHandler(w, r)
+	assertStatus(t, w, statusCode)
 }

 func putObjectTagging(t *testing.T, tc *handlerContext, bktName, objName string, tags map[string]string) {
--- a/api/handler/cors.go
+++ b/api/handler/cors.go
@ -5,10 +5,9 @@ import (
 	"strconv"
 	"strings"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"go.uber.org/zap"
 )

@ -19,7 +18,7 @@ const (
 )

 func (h *handler) GetBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -33,14 +32,14 @@ func (h *handler) GetBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	if err = middleware.EncodeToResponse(w, cors); err != nil {
+	if err = api.EncodeToResponse(w, cors); err != nil {
 		h.logAndSendError(w, "could not encode cors to response", reqInfo, err)
 		return
 	}
 }

 func (h *handler) PutBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -51,12 +50,7 @@ func (h *handler) PutBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
 	p := &layer.PutCORSParams{
 		BktInfo:      bktInfo,
 		Reader:       r.Body,
-	}
-
-	p.CopiesNumbers, err = h.pickCopiesNumbers(parseMetadata(r), bktInfo.LocationConstraint)
-	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err)
-		return
+		CopiesNumber: h.cfg.CopiesNumber,
 	}

 	if err = h.obj.PutBucketCORS(r.Context(), p); err != nil {
@ -64,11 +58,11 @@ func (h *handler) PutBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	middleware.WriteSuccessResponseHeadersOnly(w)
+	api.WriteSuccessResponseHeadersOnly(w)
 }

 func (h *handler) DeleteBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -91,21 +85,19 @@ func (h *handler) AppendCORSHeaders(w http.ResponseWriter, r *http.Request) {
 	if origin == "" {
 		return
 	}
-
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())
 	if reqInfo.BucketName == "" {
 		return
 	}
-	bktInfo, err := h.obj.GetBucketInfo(ctx, reqInfo.BucketName)
+	bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
 	if err != nil {
-		h.reqLogger(ctx).Warn("get bucket info", zap.Error(err))
+		h.log.Warn("get bucket info", zap.Error(err))
 		return
 	}

-	cors, err := h.obj.GetBucketCORS(ctx, bktInfo)
+	cors, err := h.obj.GetBucketCORS(r.Context(), bktInfo)
 	if err != nil {
-		h.reqLogger(ctx).Warn("get bucket cors", zap.Error(err))
+		h.log.Warn("get bucket cors", zap.Error(err))
 		return
 	}

@ -144,7 +136,7 @@ func (h *handler) AppendCORSHeaders(w http.ResponseWriter, r *http.Request) {
 }

 func (h *handler) Preflight(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket info", reqInfo, err)
@ -198,7 +190,7 @@ func (h *handler) Preflight(w http.ResponseWriter, r *http.Request) {
 						if o != wildcard {
 							w.Header().Set(api.AccessControlAllowCredentials, "true")
 						}
-						middleware.WriteSuccessResponseHeadersOnly(w)
+						api.WriteSuccessResponseHeadersOnly(w)
 						return
 					}
 				}
--- a/api/handler/cors_test.go
+++ b/api/handler/cors_test.go
@ -6,8 +6,7 @@ import (
 	"strings"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
 )

 func TestCORSOriginWildcard(t *testing.T) {
@ -24,14 +23,14 @@ func TestCORSOriginWildcard(t *testing.T) {
 	bktName := "bucket-for-cors"
 	box, _ := createAccessBox(t)
 	w, r := prepareTestRequest(hc, bktName, "", nil)
-	ctx := context.WithValue(r.Context(), middleware.BoxData, box)
+	ctx := context.WithValue(r.Context(), api.BoxData, box)
 	r = r.WithContext(ctx)
 	r.Header.Add(api.AmzACL, "public-read")
 	hc.Handler().CreateBucketHandler(w, r)
 	assertStatus(t, w, http.StatusOK)

 	w, r = prepareTestPayloadRequest(hc, bktName, "", strings.NewReader(body))
-	ctx = context.WithValue(r.Context(), middleware.BoxData, box)
+	ctx = context.WithValue(r.Context(), api.BoxData, box)
 	r = r.WithContext(ctx)
 	hc.Handler().PutBucketCorsHandler(w, r)
 	assertStatus(t, w, http.StatusOK)
--- a/api/handler/delete.go
+++ b/api/handler/delete.go
@ -6,21 +6,17 @@ import (
 	"strconv"
 	"strings"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	apistatus "github.com/TrueCloudLab/frostfs-sdk-go/client/status"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )

-// limitation of AWS https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html
-const maxObjectsToDelete = 1000
-
 // DeleteObjectsRequest -- xml carrying the object key names which should be deleted.
 type DeleteObjectsRequest struct {
 	// Element to enable quiet mode for the request
@ -62,8 +58,7 @@ type DeleteObjectsResponse struct {
 }

 func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())
 	versionID := reqInfo.URL.Query().Get(api.QueryVersionID)
 	versionedObject := []*layer.VersionedObject{{
 		Name:      reqInfo.ObjectName,
@ -76,7 +71,7 @@ func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	bktSettings, err := h.obj.GetBucketSettings(ctx, bktInfo)
+	bktSettings, err := h.obj.GetBucketSettings(r.Context(), bktInfo)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket settings", reqInfo, err)
 		return
@ -87,7 +82,7 @@ func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
 		Objects:  versionedObject,
 		Settings: bktSettings,
 	}
-	deletedObjects := h.obj.DeleteObjects(ctx, p)
+	deletedObjects := h.obj.DeleteObjects(r.Context(), p)
 	deletedObject := deletedObjects[0]
 	if deletedObject.Error != nil {
 		if isErrObjectLocked(deletedObject.Error) {
@ -114,7 +109,7 @@ func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
 		var objID oid.ID
 		if len(versionID) != 0 {
 			if err = objID.DecodeString(versionID); err != nil {
-				h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+				h.log.Error("couldn't send notification: %w", zap.Error(err))
 			}
 		}

@ -129,8 +124,8 @@ func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
 		}
 	}

-	if err = h.sendNotifications(ctx, m); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), m); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

 	if deletedObject.VersionID != "" {
@ -158,8 +153,7 @@ func isErrObjectLocked(err error) bool {

 // DeleteMultipleObjectsHandler handles multiple delete requests.
 func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())

 	// Content-Md5 is required and should be set
 	// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
@ -182,11 +176,6 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 		return
 	}

-	if len(requested.Objects) == 0 || len(requested.Objects) > maxObjectsToDelete {
-		h.logAndSendError(w, "number of objects to delete must be greater than 0 and less or equal to 1000", reqInfo, errors.GetAPIError(errors.ErrMalformedXML))
-		return
-	}
-
 	removed := make(map[string]*layer.VersionedObject)
 	toRemove := make([]*layer.VersionedObject, 0, len(requested.Objects))
 	for _, obj := range requested.Objects {
@ -209,7 +198,7 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 		return
 	}

-	bktSettings, err := h.obj.GetBucketSettings(ctx, bktInfo)
+	bktSettings, err := h.obj.GetBucketSettings(r.Context(), bktInfo)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket settings", reqInfo, err)
 		return
@ -227,7 +216,7 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 		Objects:  toRemove,
 		Settings: bktSettings,
 	}
-	deletedObjects := h.obj.DeleteObjects(ctx, p)
+	deletedObjects := h.obj.DeleteObjects(r.Context(), p)

 	var errs []error
 	for _, obj := range deletedObjects {
@ -262,17 +251,17 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 			zap.Array("objects", marshaler),
 			zap.Errors("errors", errs),
 		}
-		h.reqLogger(ctx).Error("couldn't delete objects", fields...)
+		h.log.Error("couldn't delete objects", fields...)
 	}

-	if err = middleware.EncodeToResponse(w, response); err != nil {
+	if err = api.EncodeToResponse(w, response); err != nil {
 		h.logAndSendError(w, "could not write response", reqInfo, err, zap.Array("objects", marshaler))
 		return
 	}
 }

 func (h *handler) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket info", reqInfo, err)
--- a/api/handler/delete_test.go
+++ b/api/handler/delete_test.go
@ -3,15 +3,11 @@ package handler
 import (
 	"bytes"
 	"net/http"
-	"net/http/httptest"
 	"net/url"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 	"github.com/stretchr/testify/require"
 )

@ -19,31 +15,6 @@ const (
 	emptyVersion = ""
 )

-func TestDeleteBucketOnAlreadyRemovedError(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-removal", "object-to-delete"
-	bktInfo := createTestBucket(hc, bktName)
-
-	putObject(t, hc, bktName, objName)
-
-	addr := getAddressOfLastVersion(hc, bktInfo, objName)
-	hc.tp.SetObjectError(addr, apistatus.ObjectAlreadyRemoved{})
-
-	deleteObjects(t, hc, bktName, [][2]string{{objName, emptyVersion}})
-
-	deleteBucket(t, hc, bktName, http.StatusNoContent)
-}
-
-func getAddressOfLastVersion(hc *handlerContext, bktInfo *data.BucketInfo, objName string) oid.Address {
-	nodeVersion, err := hc.tree.GetLatestVersion(hc.context, bktInfo, objName)
-	require.NoError(hc.t, err)
-	var addr oid.Address
-	addr.SetContainer(bktInfo.CID)
-	addr.SetObject(nodeVersion.OID)
-	return addr
-}
-
 func TestDeleteBucket(t *testing.T) {
 	tc := prepareHandlerContext(t)

@ -60,26 +31,6 @@ func TestDeleteBucket(t *testing.T) {
 	deleteBucket(t, tc, bktName, http.StatusNoContent)
 }

-func TestDeleteBucketOnNotFoundError(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-removal", "object-to-delete"
-	bktInfo := createTestBucket(hc, bktName)
-
-	putObject(t, hc, bktName, objName)
-
-	nodeVersion, err := hc.tree.GetUnversioned(hc.context, bktInfo, objName)
-	require.NoError(t, err)
-	var addr oid.Address
-	addr.SetContainer(bktInfo.CID)
-	addr.SetObject(nodeVersion.OID)
-	hc.tp.SetObjectError(addr, apistatus.ObjectNotFound{})
-
-	deleteObjects(t, hc, bktName, [][2]string{{objName, emptyVersion}})
-
-	deleteBucket(t, hc, bktName, http.StatusNoContent)
-}
-
 func TestDeleteObject(t *testing.T) {
 	tc := prepareHandlerContext(t)

@ -196,81 +147,6 @@ func TestRemoveDeleteMarker(t *testing.T) {
 	require.True(t, existInMockedFrostFS(tc, bktInfo, objInfo), "object doesn't exist but should")
 }

-func TestDeleteMarkerVersioned(t *testing.T) {
-	tc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-removal", "object-to-delete"
-	createVersionedBucketAndObject(t, tc, bktName, objName)
-
-	t.Run("not create new delete marker if last version is delete marker", func(t *testing.T) {
-		deleteMarkerVersion, isDeleteMarker := deleteObject(t, tc, bktName, objName, emptyVersion)
-		require.True(t, isDeleteMarker)
-		versions := listVersions(t, tc, bktName)
-		require.Equal(t, deleteMarkerVersion, versions.DeleteMarker[0].VersionID)
-
-		_, isDeleteMarker = deleteObject(t, tc, bktName, objName, emptyVersion)
-		require.True(t, isDeleteMarker)
-		versions = listVersions(t, tc, bktName)
-		require.Len(t, versions.DeleteMarker, 1)
-		require.Equal(t, deleteMarkerVersion, versions.DeleteMarker[0].VersionID)
-	})
-
-	t.Run("do not create delete marker if object does not exist", func(t *testing.T) {
-		versionsBefore := listVersions(t, tc, bktName)
-		_, isDeleteMarker := deleteObject(t, tc, bktName, "dummy", emptyVersion)
-		require.False(t, isDeleteMarker)
-		versionsAfter := listVersions(t, tc, bktName)
-		require.Equal(t, versionsBefore, versionsAfter)
-	})
-}
-
-func TestDeleteMarkerSuspended(t *testing.T) {
-	tc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-removal", "object-to-delete"
-	bktInfo, _ := createVersionedBucketAndObject(t, tc, bktName, objName)
-	putBucketVersioning(t, tc, bktName, false)
-
-	t.Run("not create new delete marker if last version is delete marker", func(t *testing.T) {
-		deleteMarkerVersion, isDeleteMarker := deleteObject(t, tc, bktName, objName, emptyVersion)
-		require.True(t, isDeleteMarker)
-		require.Equal(t, data.UnversionedObjectVersionID, deleteMarkerVersion)
-
-		deleteMarkerVersion, isDeleteMarker = deleteObject(t, tc, bktName, objName, emptyVersion)
-		require.True(t, isDeleteMarker)
-		require.Equal(t, data.UnversionedObjectVersionID, deleteMarkerVersion)
-
-		versions := listVersions(t, tc, bktName)
-		require.Len(t, versions.DeleteMarker, 1)
-		require.Equal(t, deleteMarkerVersion, versions.DeleteMarker[0].VersionID)
-	})
-
-	t.Run("do not create delete marker if object does not exist", func(t *testing.T) {
-		versionsBefore := listVersions(t, tc, bktName)
-		_, isDeleteMarker := deleteObject(t, tc, bktName, "dummy", emptyVersion)
-		require.False(t, isDeleteMarker)
-		versionsAfter := listVersions(t, tc, bktName)
-		require.Equal(t, versionsBefore, versionsAfter)
-	})
-
-	t.Run("remove last unversioned non delete marker", func(t *testing.T) {
-		objName := "obj3"
-		putObject(t, tc, bktName, objName)
-
-		nodeVersion, err := tc.tree.GetUnversioned(tc.Context(), bktInfo, objName)
-		require.NoError(t, err)
-
-		deleteMarkerVersion, isDeleteMarker := deleteObject(t, tc, bktName, objName, emptyVersion)
-		require.True(t, isDeleteMarker)
-		require.Equal(t, data.UnversionedObjectVersionID, deleteMarkerVersion)
-
-		objVersions := getVersion(listVersions(t, tc, bktName), objName)
-		require.Len(t, objVersions, 0)
-
-		require.False(t, tc.MockedPool().ObjectExists(nodeVersion.OID))
-	})
-}
-
 func TestDeleteObjectCombined(t *testing.T) {
 	tc := prepareHandlerContext(t)

@ -321,7 +197,7 @@ func TestDeleteMarkers(t *testing.T) {
 	deleteObject(t, tc, bktName, objName, emptyVersion)

 	versions := listVersions(t, tc, bktName)
-	require.Len(t, versions.DeleteMarker, 0, "invalid delete markers length")
+	require.Len(t, versions.DeleteMarker, 3, "invalid delete markers length")
 	require.Len(t, versions.Version, 0, "versions must be empty")

 	require.Len(t, listOIDsFromMockedFrostFS(t, tc, bktName), 0, "shouldn't be any object in frostfs")
@ -407,53 +283,28 @@ func deleteObject(t *testing.T, tc *handlerContext, bktName, objName, version st
 	return w.Header().Get(api.AmzVersionID), w.Header().Get(api.AmzDeleteMarker) != ""
 }

-func deleteObjects(t *testing.T, tc *handlerContext, bktName string, objVersions [][2]string) *DeleteObjectsResponse {
-	req := &DeleteObjectsRequest{}
-	for _, version := range objVersions {
-		req.Objects = append(req.Objects, ObjectIdentifier{
-			ObjectName: version[0],
-			VersionID:  version[1],
-		})
-	}
-
-	w, r := prepareTestRequest(tc, bktName, "", req)
-	r.Header.Set(api.ContentMD5, "")
-	tc.Handler().DeleteMultipleObjectsHandler(w, r)
-	assertStatus(t, w, http.StatusOK)
-
-	res := &DeleteObjectsResponse{}
-	parseTestResponse(t, w, res)
-	return res
-}
-
 func deleteBucket(t *testing.T, tc *handlerContext, bktName string, code int) {
 	w, r := prepareTestRequest(tc, bktName, "", nil)
 	tc.Handler().DeleteBucketHandler(w, r)
 	assertStatus(t, w, code)
 }

-func checkNotFound(t *testing.T, hc *handlerContext, bktName, objName, version string) {
-	w := headObjectBase(hc, bktName, objName, version)
-	assertStatus(t, w, http.StatusNotFound)
-}
-
-func headObjectAssertS3Error(hc *handlerContext, bktName, objName, version string, code apiErrors.ErrorCode) {
-	w := headObjectBase(hc, bktName, objName, version)
-	assertS3Error(hc.t, w, apiErrors.GetAPIError(code))
-}
-
-func checkFound(t *testing.T, hc *handlerContext, bktName, objName, version string) {
-	w := headObjectBase(hc, bktName, objName, version)
-	assertStatus(t, w, http.StatusOK)
-}
-
-func headObjectBase(hc *handlerContext, bktName, objName, version string) *httptest.ResponseRecorder {
+func checkNotFound(t *testing.T, tc *handlerContext, bktName, objName, version string) {
 	query := make(url.Values)
 	query.Add(api.QueryVersionID, version)

-	w, r := prepareTestFullRequest(hc, bktName, objName, query, nil)
-	hc.Handler().HeadObjectHandler(w, r)
-	return w
+	w, r := prepareTestFullRequest(tc, bktName, objName, query, nil)
+	tc.Handler().HeadObjectHandler(w, r)
+	assertStatus(t, w, http.StatusNotFound)
+}
+
+func checkFound(t *testing.T, tc *handlerContext, bktName, objName, version string) {
+	query := make(url.Values)
+	query.Add(api.QueryVersionID, version)
+
+	w, r := prepareTestFullRequest(tc, bktName, objName, query, nil)
+	tc.Handler().HeadObjectHandler(w, r)
+	assertStatus(t, w, http.StatusOK)
 }

 func listVersions(t *testing.T, tc *handlerContext, bktName string) *ListObjectsVersionsResponse {
@ -465,16 +316,6 @@ func listVersions(t *testing.T, tc *handlerContext, bktName string) *ListObjects
 	return res
 }

-func getVersion(resp *ListObjectsVersionsResponse, objName string) []*ObjectVersionResponse {
-	var res []*ObjectVersionResponse
-	for i, version := range resp.Version {
-		if version.Key == objName {
-			res = append(res, &resp.Version[i])
-		}
-	}
-	return res
-}
-
 func putObject(t *testing.T, tc *handlerContext, bktName, objName string) {
 	body := bytes.NewReader([]byte("content"))
 	w, r := prepareTestPayloadRequest(tc, bktName, objName, body)
--- a/api/handler/encryption_test.go
+++ b/api/handler/encryption_test.go
@ -7,14 +7,13 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"net/http/httptest"
 	"net/url"
 	"strconv"
 	"strings"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"github.com/stretchr/testify/require"
 )

@ -42,7 +41,7 @@ func TestSimpleGetEncrypted(t *testing.T) {
 	require.NoError(t, err)
 	require.NotEqual(t, content, string(encryptedContent))

-	response, _ := getEncryptedObject(tc, bktName, objName)
+	response, _ := getEncryptedObject(t, tc, bktName, objName)
 	require.Equal(t, content, string(response))
 }

@ -104,40 +103,14 @@ func TestS3EncryptionSSECMultipartUpload(t *testing.T) {
 	data := multipartUploadEncrypted(tc, bktName, objName, headers, objLen, partSize)
 	require.Equal(t, objLen, len(data))

-	resData, resHeader := getEncryptedObject(tc, bktName, objName)
+	resData, resHeader := getEncryptedObject(t, tc, bktName, objName)
 	equalDataSlices(t, data, resData)
 	require.Equal(t, headers[api.ContentType], resHeader.Get(api.ContentType))
 	require.Equal(t, headers[headerMetaKey], resHeader[headerMetaKey][0])
 	require.Equal(t, strconv.Itoa(objLen), resHeader.Get(api.ContentLength))

-	checkContentUsingRangeEnc(tc, bktName, objName, data, 1000000)
-	checkContentUsingRangeEnc(tc, bktName, objName, data, 10000000)
-}
-
-func TestMultipartUploadGetRange(t *testing.T) {
-	hc := prepareHandlerContext(t)
-	bktName, objName := "bucket-for-multipart-s3-tests", "multipart_obj"
-	createTestBucket(hc, bktName)
-
-	objLen := 30 * 1024 * 1024
-	partSize := objLen / 6
-	headerMetaKey := api.MetadataPrefix + "foo"
-	headers := map[string]string{
-		headerMetaKey:   "bar",
-		api.ContentType: "text/plain",
-	}
-
-	data := multipartUpload(hc, bktName, objName, headers, objLen, partSize)
-	require.Equal(t, objLen, len(data))
-
-	resData, resHeader := getObject(hc, bktName, objName)
-	equalDataSlices(t, data, resData)
-	require.Equal(t, headers[api.ContentType], resHeader.Get(api.ContentType))
-	require.Equal(t, headers[headerMetaKey], resHeader[headerMetaKey][0])
-	require.Equal(t, strconv.Itoa(objLen), resHeader.Get(api.ContentLength))
-
-	checkContentUsingRange(hc, bktName, objName, data, 1000000)
-	checkContentUsingRange(hc, bktName, objName, data, 10000000)
+	checkContentUsingRangeEnc(t, tc, bktName, objName, data, 1000000)
+	checkContentUsingRangeEnc(t, tc, bktName, objName, data, 10000000)
 }

 func equalDataSlices(t *testing.T, expected, actual []byte) {
@ -154,15 +127,7 @@ func equalDataSlices(t *testing.T, expected, actual []byte) {
 	}
 }

-func checkContentUsingRangeEnc(hc *handlerContext, bktName, objName string, data []byte, step int) {
-	checkContentUsingRangeBase(hc, bktName, objName, data, step, true)
-}
-
-func checkContentUsingRange(hc *handlerContext, bktName, objName string, data []byte, step int) {
-	checkContentUsingRangeBase(hc, bktName, objName, data, step, false)
-}
-
-func checkContentUsingRangeBase(hc *handlerContext, bktName, objName string, data []byte, step int, encrypted bool) {
+func checkContentUsingRangeEnc(t *testing.T, tc *handlerContext, bktName, objName string, data []byte, step int) {
 	var off, toRead, end int

 	for off < len(data) {
@ -172,14 +137,8 @@ func checkContentUsingRangeBase(hc *handlerContext, bktName, objName string, dat
 		}
 		end = off + toRead - 1

-		var rangeData []byte
-		if encrypted {
-			rangeData = getEncryptedObjectRange(hc.t, hc, bktName, objName, off, end)
-		} else {
-			rangeData = getObjectRange(hc.t, hc, bktName, objName, off, end)
-		}
-
-		equalDataSlices(hc.t, data[off:end+1], rangeData)
+		rangeData := getEncryptedObjectRange(t, tc, bktName, objName, off, end)
+		equalDataSlices(t, data[off:end+1], rangeData)

 		off += step
 	}
@ -209,30 +168,6 @@ func multipartUploadEncrypted(hc *handlerContext, bktName, objName string, heade
 	return
 }

-func multipartUpload(hc *handlerContext, bktName, objName string, headers map[string]string, objLen, partsSize int) (objData []byte) {
-	multipartInfo := createMultipartUpload(hc, bktName, objName, headers)
-
-	var sum, currentPart int
-	var etags []string
-	adjustedSize := partsSize
-
-	for sum < objLen {
-		currentPart++
-
-		sum += partsSize
-		if sum > objLen {
-			adjustedSize = objLen - sum
-		}
-
-		etag, data := uploadPart(hc, bktName, objName, multipartInfo.UploadID, currentPart, adjustedSize)
-		etags = append(etags, etag)
-		objData = append(objData, data...)
-	}
-
-	completeMultipartUpload(hc, bktName, objName, multipartInfo.UploadID, etags)
-	return
-}
-
 func createMultipartUploadEncrypted(hc *handlerContext, bktName, objName string, headers map[string]string) *InitiateMultipartUploadResponse {
 	return createMultipartUploadBase(hc, bktName, objName, true, headers)
 }
@ -255,11 +190,6 @@ func createMultipartUploadBase(hc *handlerContext, bktName, objName string, encr
 }

 func completeMultipartUpload(hc *handlerContext, bktName, objName, uploadID string, partsETags []string) {
-	w := completeMultipartUploadBase(hc, bktName, objName, uploadID, partsETags)
-	assertStatus(hc.t, w, http.StatusOK)
-}
-
-func completeMultipartUploadBase(hc *handlerContext, bktName, objName, uploadID string, partsETags []string) *httptest.ResponseRecorder {
 	query := make(url.Values)
 	query.Set(uploadIDQuery, uploadID)
 	complete := &CompleteMultipartUpload{
@ -274,8 +204,7 @@ func completeMultipartUploadBase(hc *handlerContext, bktName, objName, uploadID

 	w, r := prepareTestFullRequest(hc, bktName, objName, query, complete)
 	hc.Handler().CompleteMultipartUploadHandler(w, r)
-
-	return w
+	assertStatus(hc.t, w, http.StatusOK)
 }

 func uploadPartEncrypted(hc *handlerContext, bktName, objName, uploadID string, num, size int) (string, []byte) {
@ -318,7 +247,7 @@ func TestMultipartEncrypted(t *testing.T) {
 	part2ETag, part2 := uploadPartEncrypted(hc, bktName, objName, multipartInitInfo.UploadID, 2, 5)
 	completeMultipartUpload(hc, bktName, objName, multipartInitInfo.UploadID, []string{part1ETag, part2ETag})

-	res, _ := getEncryptedObject(hc, bktName, objName)
+	res, _ := getEncryptedObject(t, hc, bktName, objName)
 	require.Equal(t, len(part1)+len(part2), len(res))
 	require.Equal(t, append(part1, part2...), res)

@ -334,22 +263,13 @@ func putEncryptedObject(t *testing.T, tc *handlerContext, bktName, objName, cont
 	assertStatus(t, w, http.StatusOK)
 }

-func getEncryptedObject(hc *handlerContext, bktName, objName string) ([]byte, http.Header) {
-	w, r := prepareTestRequest(hc, bktName, objName, nil)
+func getEncryptedObject(t *testing.T, tc *handlerContext, bktName, objName string) ([]byte, http.Header) {
+	w, r := prepareTestRequest(tc, bktName, objName, nil)
 	setEncryptHeaders(r)
-	return getObjectBase(hc, w, r)
-}
-
-func getObject(hc *handlerContext, bktName, objName string) ([]byte, http.Header) {
-	w, r := prepareTestRequest(hc, bktName, objName, nil)
-	return getObjectBase(hc, w, r)
-}
-
-func getObjectBase(hc *handlerContext, w *httptest.ResponseRecorder, r *http.Request) ([]byte, http.Header) {
-	hc.Handler().GetObjectHandler(w, r)
-	assertStatus(hc.t, w, http.StatusOK)
+	tc.Handler().GetObjectHandler(w, r)
+	assertStatus(t, w, http.StatusOK)
 	content, err := io.ReadAll(w.Result().Body)
-	require.NoError(hc.t, err)
+	require.NoError(t, err)
 	return content, w.Header()
 }

--- a/api/handler/get.go
+++ b/api/handler/get.go
@ -8,12 +8,10 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"go.uber.org/zap"
 )

@ -89,10 +87,8 @@ func writeHeaders(h http.Header, requestHeader http.Header, extendedInfo *data.E
 	if len(info.Headers[layer.AttributeEncryptionAlgorithm]) > 0 {
 		h.Set(api.ContentLength, info.Headers[layer.AttributeDecryptedSize])
 		addSSECHeaders(h, requestHeader)
-	} else if len(info.Headers[layer.MultipartObjectSize]) > 0 {
-		h.Set(api.ContentLength, info.Headers[layer.MultipartObjectSize])
 	} else {
-		h.Set(api.ContentLength, strconv.FormatUint(info.Size, 10))
+		h.Set(api.ContentLength, strconv.FormatInt(info.Size, 10))
 	}

 	h.Set(api.ETag, info.HashSum)
@ -108,9 +104,6 @@ func writeHeaders(h http.Header, requestHeader http.Header, extendedInfo *data.E
 	if expires := info.Headers[api.Expires]; expires != "" {
 		h.Set(api.Expires, expires)
 	}
-	if encodings := info.Headers[api.ContentEncoding]; encodings != "" {
-		h.Set(api.ContentEncoding, encodings)
-	}

 	for key, val := range info.Headers {
 		if layer.IsSystemHeader(key) {
@ -124,7 +117,7 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 	var (
 		params *layer.RangeParams

-		reqInfo = middleware.GetReqInfo(r.Context())
+		reqInfo = api.GetReqInfo(r.Context())
 	)

 	conditional, err := parseConditionalHeaders(r.Header)
@ -168,13 +161,15 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	fullSize, err := getObjectSize(extendedInfo, encryptionParams)
-	if err != nil {
-		h.logAndSendError(w, "invalid size header", reqInfo, errors.GetAPIError(errors.ErrBadRequest))
+	fullSize := info.Size
+	if encryptionParams.Enabled() {
+		if fullSize, err = strconv.ParseInt(info.Headers[layer.AttributeDecryptedSize], 10, 64); err != nil {
+			h.logAndSendError(w, "invalid decrypted size header", reqInfo, errors.GetAPIError(errors.ErrBadRequest))
 			return
 		}
+	}

-	if params, err = fetchRangeHeader(r.Header, fullSize); err != nil {
+	if params, err = fetchRangeHeader(r.Header, uint64(fullSize)); err != nil {
 		h.logAndSendError(w, "could not parse range header", reqInfo, err)
 		return
 	}
@ -206,70 +201,38 @@ func (h *handler) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	getPayloadParams := &layer.GetObjectParams{
-		ObjectInfo: info,
-		Versioned:  p.Versioned(),
-		Range:      params,
-		BucketInfo: bktInfo,
-		Encryption: encryptionParams,
-	}
-
-	objPayload, err := h.obj.GetObject(r.Context(), getPayloadParams)
-	if err != nil {
-		h.logAndSendError(w, "could not get object payload", reqInfo, err)
-		return
-	}
-
 	writeHeaders(w.Header(), r.Header, extendedInfo, len(tagSet), bktSettings.Unversioned())
 	if params != nil {
-		writeRangeHeaders(w, params, fullSize)
+		writeRangeHeaders(w, params, info.Size)
 	} else {
 		w.WriteHeader(http.StatusOK)
 	}

-	if err = objPayload.StreamTo(w); err != nil {
-		h.logAndSendError(w, "could not stream object payload", reqInfo, err)
-		return
+	getParams := &layer.GetObjectParams{
+		ObjectInfo: info,
+		Writer:     w,
+		Range:      params,
+		BucketInfo: bktInfo,
+		Encryption: encryptionParams,
 	}
+	if err = h.obj.GetObject(r.Context(), getParams); err != nil {
+		h.logAndSendError(w, "could not get object", reqInfo, err)
 	}
-
-func getObjectSize(extendedInfo *data.ExtendedObjectInfo, encryptionParams encryption.Params) (uint64, error) {
-	var err error
-	fullSize := extendedInfo.ObjectInfo.Size
-
-	if encryptionParams.Enabled() {
-		if fullSize, err = strconv.ParseUint(extendedInfo.ObjectInfo.Headers[layer.AttributeDecryptedSize], 10, 64); err != nil {
-			return 0, fmt.Errorf("invalid decrypted size header: %w", err)
-		}
-	} else if extendedInfo.NodeVersion.IsCombined {
-		if fullSize, err = strconv.ParseUint(extendedInfo.ObjectInfo.Headers[layer.MultipartObjectSize], 10, 64); err != nil {
-			return 0, fmt.Errorf("invalid multipart size header: %w", err)
-		}
-	}
-
-	return fullSize, nil
 }

 func checkPreconditions(info *data.ObjectInfo, args *conditionalArgs) error {
 	if len(args.IfMatch) > 0 && args.IfMatch != info.HashSum {
-		return fmt.Errorf("%w: etag mismatched: '%s', '%s'", errors.GetAPIError(errors.ErrPreconditionFailed), args.IfMatch, info.HashSum)
+		return errors.GetAPIError(errors.ErrPreconditionFailed)
 	}
 	if len(args.IfNoneMatch) > 0 && args.IfNoneMatch == info.HashSum {
-		return fmt.Errorf("%w: etag matched: '%s', '%s'", errors.GetAPIError(errors.ErrNotModified), args.IfNoneMatch, info.HashSum)
+		return errors.GetAPIError(errors.ErrNotModified)
 	}
 	if args.IfModifiedSince != nil && info.Created.Before(*args.IfModifiedSince) {
-		return fmt.Errorf("%w: not modified since '%s', last modified '%s'", errors.GetAPIError(errors.ErrNotModified),
-			args.IfModifiedSince.Format(time.RFC3339), info.Created.Format(time.RFC3339))
+		return errors.GetAPIError(errors.ErrNotModified)
 	}
 	if args.IfUnmodifiedSince != nil && info.Created.After(*args.IfUnmodifiedSince) {
-		// https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObject.html#API_GetObject_RequestSyntax
-		// If both of the If-Match and If-Unmodified-Since headers are present in the request as follows:
-		// If-Match condition evaluates to true, and;
-		// If-Unmodified-Since condition evaluates to false;
-		// then, S3 returns 200 OK and the data requested.
 		if len(args.IfMatch) == 0 {
-			return fmt.Errorf("%w: modified since '%s', last modified '%s'", errors.GetAPIError(errors.ErrPreconditionFailed),
-				args.IfUnmodifiedSince.Format(time.RFC3339), info.Created.Format(time.RFC3339))
+			return errors.GetAPIError(errors.ErrPreconditionFailed)
 		}
 	}

@ -279,8 +242,8 @@ func checkPreconditions(info *data.ObjectInfo, args *conditionalArgs) error {
 func parseConditionalHeaders(headers http.Header) (*conditionalArgs, error) {
 	var err error
 	args := &conditionalArgs{
-		IfMatch:     strings.Trim(headers.Get(api.IfMatch), "\""),
-		IfNoneMatch: strings.Trim(headers.Get(api.IfNoneMatch), "\""),
+		IfMatch:     headers.Get(api.IfMatch),
+		IfNoneMatch: headers.Get(api.IfNoneMatch),
 	}

 	if args.IfModifiedSince, err = parseHTTPTime(headers.Get(api.IfModifiedSince)); err != nil {
@ -305,7 +268,7 @@ func parseHTTPTime(data string) (*time.Time, error) {
 	return &result, nil
 }

-func writeRangeHeaders(w http.ResponseWriter, params *layer.RangeParams, size uint64) {
+func writeRangeHeaders(w http.ResponseWriter, params *layer.RangeParams, size int64) {
 	w.Header().Set(api.AcceptRanges, "bytes")
 	w.Header().Set(api.ContentRange, fmt.Sprintf("bytes %d-%d/%d", params.Start, params.End, size))
 	w.Header().Set(api.ContentLength, strconv.FormatUint(params.End-params.Start+1, 10))
--- a/api/handler/get_test.go
+++ b/api/handler/get_test.go
@ -2,22 +2,15 @@ package handler

 import (
 	"bytes"
-	stderrors "errors"
 	"fmt"
 	"io"
 	"net/http"
-	"net/http/httptest"
-	"net/url"
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"github.com/stretchr/testify/require"
 )

@ -150,11 +143,7 @@ func TestPreconditions(t *testing.T) {
 	} {
 		t.Run(tc.name, func(t *testing.T) {
 			actual := checkPreconditions(tc.info, tc.args)
-			if tc.expected == nil {
-				require.NoError(t, actual)
-			} else {
-				require.True(t, stderrors.Is(actual, tc.expected), tc.expected, actual)
-			}
+			require.Equal(t, tc.expected, actual)
 		})
 	}
 }
@ -181,24 +170,6 @@ func TestGetRange(t *testing.T) {
 	require.Equal(t, "bcdef", string(end))
 }

-func TestGetObject(t *testing.T) {
-	hc := prepareHandlerContext(t)
-	bktName, objName := "bucket", "obj"
-	bktInfo, objInfo := createVersionedBucketAndObject(hc.t, hc, bktName, objName)
-
-	putObject(hc.t, hc, bktName, objName)
-
-	checkFound(hc.t, hc, bktName, objName, objInfo.VersionID())
-	checkFound(hc.t, hc, bktName, objName, emptyVersion)
-
-	addr := getAddressOfLastVersion(hc, bktInfo, objName)
-	hc.tp.SetObjectError(addr, apistatus.ObjectNotFound{})
-	hc.tp.SetObjectError(objInfo.Address(), apistatus.ObjectNotFound{})
-
-	getObjectAssertS3Error(hc, bktName, objName, objInfo.VersionID(), s3errors.ErrNoSuchVersion)
-	getObjectAssertS3Error(hc, bktName, objName, emptyVersion, s3errors.ErrNoSuchKey)
-}
-
 func putObjectContent(hc *handlerContext, bktName, objName, content string) {
 	body := bytes.NewReader([]byte(content))
 	w, r := prepareTestPayloadRequest(hc, bktName, objName, body)
@ -215,17 +186,3 @@ func getObjectRange(t *testing.T, tc *handlerContext, bktName, objName string, s
 	require.NoError(t, err)
 	return content
 }
-
-func getObjectAssertS3Error(hc *handlerContext, bktName, objName, version string, code apiErrors.ErrorCode) {
-	w := getObjectBaseResponse(hc, bktName, objName, version)
-	assertS3Error(hc.t, w, apiErrors.GetAPIError(code))
-}
-
-func getObjectBaseResponse(hc *handlerContext, bktName, objName, version string) *httptest.ResponseRecorder {
-	query := make(url.Values)
-	query.Add(api.QueryVersionID, version)
-
-	w, r := prepareTestFullRequest(hc, bktName, objName, query, nil)
-	hc.Handler().GetObjectHandler(w, r)
-	return w
-}
--- a/api/handler/handlers_test.go
+++ b/api/handler/handlers_test.go
@ -13,17 +13,15 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/cache"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/resolver"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/resolver"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/netmap"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
@ -34,9 +32,7 @@ type handlerContext struct {
 	t       *testing.T
 	h       *handler
 	tp      *layer.TestFrostFS
-	tree    *tree.Tree
 	context context.Context
-	kludge  *kludgeSettingsMock
 }

 func (hc *handlerContext) Handler() *handler {
@ -57,50 +53,17 @@ func (hc *handlerContext) Context() context.Context {

 type placementPolicyMock struct {
 	defaultPolicy netmap.PlacementPolicy
-	copiesNumbers        map[string][]uint32
-	defaultCopiesNumbers []uint32
 }

-func (p *placementPolicyMock) DefaultPlacementPolicy() netmap.PlacementPolicy {
+func (p *placementPolicyMock) Default() netmap.PlacementPolicy {
 	return p.defaultPolicy
 }

-func (p *placementPolicyMock) PlacementPolicy(string) (netmap.PlacementPolicy, bool) {
+func (p *placementPolicyMock) Get(string) (netmap.PlacementPolicy, bool) {
 	return netmap.PlacementPolicy{}, false
 }

-func (p *placementPolicyMock) CopiesNumbers(locationConstraint string) ([]uint32, bool) {
-	result, ok := p.copiesNumbers[locationConstraint]
-	return result, ok
-}
-
-func (p *placementPolicyMock) DefaultCopiesNumbers() []uint32 {
-	return p.defaultCopiesNumbers
-}
-
-type xmlDecoderProviderMock struct{}
-
-func (p *xmlDecoderProviderMock) NewCompleteMultipartDecoder(r io.Reader) *xml.Decoder {
-	return xml.NewDecoder(r)
-}
-
-type kludgeSettingsMock struct {
-	bypassContentEncodingInChunks bool
-}
-
-func (k *kludgeSettingsMock) BypassContentEncodingInChunks() bool {
-	return k.bypassContentEncodingInChunks
-}
-
 func prepareHandlerContext(t *testing.T) *handlerContext {
-	return prepareHandlerContextBase(t, false)
-}
-
-func prepareHandlerContextWithMinCache(t *testing.T) *handlerContext {
-	return prepareHandlerContextBase(t, true)
-}
-
-func prepareHandlerContextBase(t *testing.T, minCache bool) *handlerContext {
 	key, err := keys.NewPrivateKey()
 	require.NoError(t, err)

@ -115,33 +78,22 @@ func prepareHandlerContextBase(t *testing.T, minCache bool) *handlerContext {
 	var owner user.ID
 	user.IDFromKey(&owner, key.PrivateKey.PublicKey)

-	treeMock := NewTreeServiceMock(t)
-
-	cacheCfg := layer.DefaultCachesConfigs(l)
-	if minCache {
-		cacheCfg = getMinCacheConfig(l)
-	}
-
 	layerCfg := &layer.Config{
-		Caches:      cacheCfg,
+		Caches:      layer.DefaultCachesConfigs(zap.NewExample()),
 		AnonKey:     layer.AnonymousKey{Key: key},
 		Resolver:    testResolver,
-		TreeService: treeMock,
+		TreeService: layer.NewTreeService(),
 	}

 	var pp netmap.PlacementPolicy
 	err = pp.DecodeString("REP 1")
 	require.NoError(t, err)

-	kludge := &kludgeSettingsMock{}
-
 	h := &handler{
 		log: l,
 		obj: layer.NewLayer(l, tp, layerCfg),
 		cfg: &Config{
 			Policy: &placementPolicyMock{defaultPolicy: pp},
-			XMLDecoder: &xmlDecoderProviderMock{},
-			Kludge:     kludge,
 		},
 	}

@ -150,35 +102,10 @@ func prepareHandlerContextBase(t *testing.T, minCache bool) *handlerContext {
 		t:       t,
 		h:       h,
 		tp:      tp,
-		tree:    treeMock,
-		context: context.WithValue(context.Background(), middleware.BoxData, newTestAccessBox(t, key)),
-		kludge:  kludge,
+		context: context.WithValue(context.Background(), api.BoxData, newTestAccessBox(t, key)),
 	}
 }

-func getMinCacheConfig(logger *zap.Logger) *layer.CachesConfig {
-	minCacheCfg := &cache.Config{
-		Size:     1,
-		Lifetime: 1,
-		Logger:   logger,
-	}
-	return &layer.CachesConfig{
-		Logger:        logger,
-		Objects:       minCacheCfg,
-		ObjectsList:   minCacheCfg,
-		Names:         minCacheCfg,
-		Buckets:       minCacheCfg,
-		System:        minCacheCfg,
-		AccessControl: minCacheCfg,
-	}
-}
-
-func NewTreeServiceMock(t *testing.T) *tree.Tree {
-	memCli, err := tree.NewTreeServiceClientMemory()
-	require.NoError(t, err)
-	return tree.NewTree(memCli, zap.NewExample())
-}
-
 func createTestBucket(hc *handlerContext, bktName string) *data.BucketInfo {
 	_, err := hc.MockedPool().CreateContainer(hc.Context(), layer.PrmContainerCreate{
 		Creator: hc.owner,
@ -234,7 +161,7 @@ func createTestObject(hc *handlerContext, bktInfo *data.BucketInfo, objName stri
 	extObjInfo, err := hc.Layer().PutObject(hc.Context(), &layer.PutObjectParams{
 		BktInfo: bktInfo,
 		Object:  objName,
-		Size:    uint64(len(content)),
+		Size:    int64(len(content)),
 		Reader:  bytes.NewReader(content),
 		Header:  header,
 	})
@ -259,8 +186,8 @@ func prepareTestRequestWithQuery(hc *handlerContext, bktName, objName string, qu
 	r := httptest.NewRequest(http.MethodPut, defaultURL, bytes.NewReader(body))
 	r.URL.RawQuery = query.Encode()

-	reqInfo := middleware.NewReqInfo(w, r, middleware.ObjectRequest{Bucket: bktName, Object: objName})
-	r = r.WithContext(middleware.SetReqInfo(hc.Context(), reqInfo))
+	reqInfo := api.NewReqInfo(w, r, api.ObjectRequest{Bucket: bktName, Object: objName})
+	r = r.WithContext(api.SetReqInfo(hc.Context(), reqInfo))

 	return w, r
 }
@ -269,8 +196,8 @@ func prepareTestPayloadRequest(hc *handlerContext, bktName, objName string, payl
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest(http.MethodPut, defaultURL, payload)

-	reqInfo := middleware.NewReqInfo(w, r, middleware.ObjectRequest{Bucket: bktName, Object: objName})
-	r = r.WithContext(middleware.SetReqInfo(hc.Context(), reqInfo))
+	reqInfo := api.NewReqInfo(w, r, api.ObjectRequest{Bucket: bktName, Object: objName})
+	r = r.WithContext(api.SetReqInfo(hc.Context(), reqInfo))

 	return w, r
 }
@ -285,16 +212,10 @@ func existInMockedFrostFS(tc *handlerContext, bktInfo *data.BucketInfo, objInfo
 	p := &layer.GetObjectParams{
 		BucketInfo: bktInfo,
 		ObjectInfo: objInfo,
+		Writer:     io.Discard,
 	}

-	objPayload, err := tc.Layer().GetObject(tc.Context(), p)
-	if err != nil {
-		return false
-	}
-
-	_, err = io.ReadAll(objPayload)
-	require.NoError(tc.t, err)
-	return true
+	return tc.Layer().GetObject(tc.Context(), p) == nil
 }

 func listOIDsFromMockedFrostFS(t *testing.T, tc *handlerContext, bktName string) []oid.ID {
--- a/api/handler/head.go
+++ b/api/handler/head.go
@ -1,21 +1,20 @@
 package handler

 import (
-	"io"
+	"bytes"
 	"net/http"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"go.uber.org/zap"
 )

 const sizeToDetectType = 512

-func getRangeToDetectContentType(maxSize uint64) *layer.RangeParams {
-	end := maxSize
+func getRangeToDetectContentType(maxSize int64) *layer.RangeParams {
+	end := uint64(maxSize)
 	if sizeToDetectType < end {
 		end = sizeToDetectType
 	}
@ -27,7 +26,7 @@ func getRangeToDetectContentType(maxSize uint64) *layer.RangeParams {
 }

 func (h *handler) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -84,26 +83,18 @@ func (h *handler) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {

 	if len(info.ContentType) == 0 {
 		if info.ContentType = layer.MimeByFilePath(info.Name); len(info.ContentType) == 0 {
+			buffer := bytes.NewBuffer(make([]byte, 0, sizeToDetectType))
 			getParams := &layer.GetObjectParams{
 				ObjectInfo: info,
-				Versioned:  p.Versioned(),
+				Writer:     buffer,
 				Range:      getRangeToDetectContentType(info.Size),
 				BucketInfo: bktInfo,
 			}
-
-			objPayload, err := h.obj.GetObject(r.Context(), getParams)
-			if err != nil {
+			if err = h.obj.GetObject(r.Context(), getParams); err != nil {
 				h.logAndSendError(w, "could not get object", reqInfo, err, zap.Stringer("oid", info.ID))
 				return
 			}
-
-			buffer, err := io.ReadAll(objPayload)
-			if err != nil {
-				h.logAndSendError(w, "could not partly read payload to detect content type", reqInfo, err, zap.Stringer("oid", info.ID))
-				return
-			}
-
-			info.ContentType = http.DetectContentType(buffer)
+			info.ContentType = http.DetectContentType(buffer.Bytes())
 		}
 	}

@ -123,7 +114,7 @@ func (h *handler) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
 }

 func (h *handler) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -131,7 +122,6 @@ func (h *handler) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	w.Header().Set(api.OwnerID, bktInfo.Owner.EncodeToString())
 	w.Header().Set(api.ContainerID, bktInfo.CID.EncodeToString())
 	w.Header().Set(api.AmzBucketRegion, bktInfo.LocationConstraint)

@ -140,7 +130,7 @@ func (h *handler) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set(api.ContainerZone, bktInfo.Zone)
 	}

-	middleware.WriteResponse(w, http.StatusOK, nil, middleware.MimeNone)
+	api.WriteResponse(w, http.StatusOK, nil, api.MimeNone)
 }

 func (h *handler) setLockingHeaders(bktInfo *data.BucketInfo, lockInfo *data.LockInfo, header http.Header) error {
--- a/api/handler/head_test.go
+++ b/api/handler/head_test.go
@ -6,13 +6,10 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/stretchr/testify/require"
 )
@ -27,14 +24,10 @@ func TestConditionalHead(t *testing.T) {
 	tc.Handler().HeadObjectHandler(w, r)
 	assertStatus(t, w, http.StatusOK)
 	etag := w.Result().Header.Get(api.ETag)
-	etagQuoted := "\"" + etag + "\""

 	headers := map[string]string{api.IfMatch: etag}
 	headObject(t, tc, bktName, objName, headers, http.StatusOK)

-	headers = map[string]string{api.IfMatch: etagQuoted}
-	headObject(t, tc, bktName, objName, headers, http.StatusOK)
-
 	headers = map[string]string{api.IfMatch: "etag"}
 	headObject(t, tc, bktName, objName, headers, http.StatusPreconditionFailed)

@ -54,9 +47,6 @@ func TestConditionalHead(t *testing.T) {
 	headers = map[string]string{api.IfNoneMatch: etag}
 	headObject(t, tc, bktName, objName, headers, http.StatusNotModified)

-	headers = map[string]string{api.IfNoneMatch: etagQuoted}
-	headObject(t, tc, bktName, objName, headers, http.StatusNotModified)
-
 	headers = map[string]string{api.IfNoneMatch: "etag"}
 	headObject(t, tc, bktName, objName, headers, http.StatusOK)

@ -92,28 +82,10 @@ func TestInvalidAccessThroughCache(t *testing.T) {
 	headObject(t, tc, bktName, objName, nil, http.StatusOK)

 	w, r := prepareTestRequest(tc, bktName, objName, nil)
-	tc.Handler().HeadObjectHandler(w, r.WithContext(context.WithValue(r.Context(), middleware.BoxData, newTestAccessBox(t, nil))))
+	tc.Handler().HeadObjectHandler(w, r.WithContext(context.WithValue(r.Context(), api.BoxData, newTestAccessBox(t, nil))))
 	assertStatus(t, w, http.StatusForbidden)
 }

-func TestHeadObject(t *testing.T) {
-	hc := prepareHandlerContextWithMinCache(t)
-	bktName, objName := "bucket", "obj"
-	bktInfo, objInfo := createVersionedBucketAndObject(hc.t, hc, bktName, objName)
-
-	putObject(hc.t, hc, bktName, objName)
-
-	checkFound(hc.t, hc, bktName, objName, objInfo.VersionID())
-	checkFound(hc.t, hc, bktName, objName, emptyVersion)
-
-	addr := getAddressOfLastVersion(hc, bktInfo, objName)
-	hc.tp.SetObjectError(addr, apistatus.ObjectNotFound{})
-	hc.tp.SetObjectError(objInfo.Address(), apistatus.ObjectNotFound{})
-
-	headObjectAssertS3Error(hc, bktName, objName, objInfo.VersionID(), s3errors.ErrNoSuchVersion)
-	headObjectAssertS3Error(hc, bktName, objName, emptyVersion, s3errors.ErrNoSuchKey)
-}
-
 func TestIsAvailableToResolve(t *testing.T) {
 	list := []string{"container", "s3"}

--- a/api/handler/info.go
+++ b/api/handler/info.go
@ -3,11 +3,11 @@ package handler
 import (
 	"net/http"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
 )

 func (h *handler) GetBucketLocationHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -15,7 +15,7 @@ func (h *handler) GetBucketLocationHandler(w http.ResponseWriter, r *http.Reques
 		return
 	}

-	if err = middleware.EncodeToResponse(w, LocationResponse{Location: bktInfo.LocationConstraint}); err != nil {
+	if err = api.EncodeToResponse(w, LocationResponse{Location: bktInfo.LocationConstraint}); err != nil {
 		h.logAndSendError(w, "couldn't encode bucket location response", reqInfo, err)
 	}
 }
--- a/api/handler/list.go
+++ b/api/handler/list.go
@ -4,8 +4,8 @@ import (
 	"net/http"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 )

 const maxObjectList = 1000 // Limit number of objects in a listObjectsResponse/listObjectsVersionsResponse.
@ -15,7 +15,7 @@ func (h *handler) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
 	var (
 		own     user.ID
 		res     *ListBucketsResponse
-		reqInfo = middleware.GetReqInfo(r.Context())
+		reqInfo = api.GetReqInfo(r.Context())
 	)

 	list, err := h.obj.ListBuckets(r.Context())
@ -42,7 +42,7 @@ func (h *handler) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
 		})
 	}

-	if err = middleware.EncodeToResponse(w, res); err != nil {
+	if err = api.EncodeToResponse(w, res); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }
--- a/api/handler/locking.go
+++ b/api/handler/locking.go
@ -8,11 +8,10 @@ import (
 	"strconv"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	apiErrors "github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 )

 const (
@ -27,7 +26,7 @@ const (
 )

 func (h *handler) PutBucketObjectLockConfigHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -74,7 +73,7 @@ func (h *handler) PutBucketObjectLockConfigHandler(w http.ResponseWriter, r *htt
 }

 func (h *handler) GetBucketObjectLockConfigHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -101,13 +100,13 @@ func (h *handler) GetBucketObjectLockConfigHandler(w http.ResponseWriter, r *htt
 		settings.LockConfiguration.ObjectLockEnabled = enabledValue
 	}

-	if err = middleware.EncodeToResponse(w, settings.LockConfiguration); err != nil {
+	if err = api.EncodeToResponse(w, settings.LockConfiguration); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

 func (h *handler) PutObjectLegalHoldHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -144,12 +143,7 @@ func (h *handler) PutObjectLegalHoldHandler(w http.ResponseWriter, r *http.Reque
 				Enabled: legalHold.Status == legalHoldOn,
 			},
 		},
-	}
-
-	p.CopiesNumbers, err = h.pickCopiesNumbers(parseMetadata(r), bktInfo.LocationConstraint)
-	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err)
-		return
+		CopiesNumber: h.cfg.CopiesNumber,
 	}

 	if err = h.obj.PutLockInfo(r.Context(), p); err != nil {
@ -159,7 +153,7 @@ func (h *handler) PutObjectLegalHoldHandler(w http.ResponseWriter, r *http.Reque
 }

 func (h *handler) GetObjectLegalHoldHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -190,13 +184,13 @@ func (h *handler) GetObjectLegalHoldHandler(w http.ResponseWriter, r *http.Reque
 		legalHold.Status = legalHoldOn
 	}

-	if err = middleware.EncodeToResponse(w, legalHold); err != nil {
+	if err = api.EncodeToResponse(w, legalHold); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

 func (h *handler) PutObjectRetentionHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -228,12 +222,7 @@ func (h *handler) PutObjectRetentionHandler(w http.ResponseWriter, r *http.Reque
 			VersionID:  reqInfo.URL.Query().Get(api.QueryVersionID),
 		},
 		NewLock:      lock,
-	}
-
-	p.CopiesNumbers, err = h.pickCopiesNumbers(parseMetadata(r), bktInfo.LocationConstraint)
-	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err)
-		return
+		CopiesNumber: h.cfg.CopiesNumber,
 	}

 	if err = h.obj.PutLockInfo(r.Context(), p); err != nil {
@ -243,7 +232,7 @@ func (h *handler) PutObjectRetentionHandler(w http.ResponseWriter, r *http.Reque
 }

 func (h *handler) GetObjectRetentionHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -282,7 +271,7 @@ func (h *handler) GetObjectRetentionHandler(w http.ResponseWriter, r *http.Reque
 		retention.Mode = complianceMode
 	}

-	if err = middleware.EncodeToResponse(w, retention); err != nil {
+	if err = api.EncodeToResponse(w, retention); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }
--- a/api/handler/locking_test.go
+++ b/api/handler/locking_test.go
@ -10,10 +10,9 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	apiErrors "github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"github.com/stretchr/testify/require"
 )

@ -314,7 +313,7 @@ func TestPutBucketLockConfigurationHandler(t *testing.T) {

 			w := httptest.NewRecorder()
 			r := httptest.NewRequest(http.MethodPut, defaultURL, bytes.NewReader(body))
-			r = r.WithContext(middleware.SetReqInfo(r.Context(), middleware.NewReqInfo(w, r, middleware.ObjectRequest{Bucket: tc.bucket})))
+			r = r.WithContext(api.SetReqInfo(r.Context(), api.NewReqInfo(w, r, api.ObjectRequest{Bucket: tc.bucket})))

 			hc.Handler().PutBucketObjectLockConfigHandler(w, r)

@ -387,7 +386,7 @@ func TestGetBucketLockConfigurationHandler(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			w := httptest.NewRecorder()
 			r := httptest.NewRequest(http.MethodPut, defaultURL, bytes.NewReader(nil))
-			r = r.WithContext(middleware.SetReqInfo(r.Context(), middleware.NewReqInfo(w, r, middleware.ObjectRequest{Bucket: tc.bucket})))
+			r = r.WithContext(api.SetReqInfo(r.Context(), api.NewReqInfo(w, r, api.ObjectRequest{Bucket: tc.bucket})))

 			hc.Handler().GetBucketObjectLockConfigHandler(w, r)

@ -407,7 +406,7 @@ func TestGetBucketLockConfigurationHandler(t *testing.T) {
 }

 func assertS3Error(t *testing.T, w *httptest.ResponseRecorder, expectedError apiErrors.Error) {
-	actualErrorResponse := &middleware.ErrorResponse{}
+	actualErrorResponse := &api.ErrorResponse{}
 	err := xml.NewDecoder(w.Result().Body).Decode(actualErrorResponse)
 	require.NoError(t, err)

--- a/api/handler/multipart_upload.go
+++ b/api/handler/multipart_upload.go
@ -2,18 +2,16 @@ package handler

 import (
 	"encoding/xml"
-	"fmt"
-	"io"
 	"net/http"
 	"net/url"
 	"strconv"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"github.com/google/uuid"
 	"go.uber.org/zap"
 )
@ -95,7 +93,7 @@ const (
 )

 func (h *handler) CreateMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -104,7 +102,10 @@ func (h *handler) CreateMultipartUploadHandler(w http.ResponseWriter, r *http.Re
 	}

 	uploadID := uuid.New()
-	additional := []zap.Field{zap.String("uploadID", uploadID.String())}
+	additional := []zap.Field{
+		zap.String("uploadID", uploadID.String()),
+		zap.String("Key", reqInfo.ObjectName),
+	}

 	p := &layer.CreateMultipartParams{
 		Info: &layer.UploadInfoParams{
@ -118,11 +119,11 @@ func (h *handler) CreateMultipartUploadHandler(w http.ResponseWriter, r *http.Re
 	if containsACLHeaders(r) {
 		key, err := h.bearerTokenIssuerKey(r.Context())
 		if err != nil {
-			h.logAndSendError(w, "couldn't get gate key", reqInfo, err, additional...)
+			h.logAndSendError(w, "couldn't get gate key", reqInfo, err)
 			return
 		}
 		if _, err = parseACLHeaders(r.Header, key); err != nil {
-			h.logAndSendError(w, "could not parse acl", reqInfo, err, additional...)
+			h.logAndSendError(w, "could not parse acl", reqInfo, err)
 			return
 		}
 		p.Data.ACLHeaders = formACLHeadersForMultipart(r.Header)
@ -138,7 +139,7 @@ func (h *handler) CreateMultipartUploadHandler(w http.ResponseWriter, r *http.Re

 	p.Info.Encryption, err = formEncryptionParams(r)
 	if err != nil {
-		h.logAndSendError(w, "invalid sse headers", reqInfo, err, additional...)
+		h.logAndSendError(w, "invalid sse headers", reqInfo, err)
 		return
 	}

@ -147,9 +148,9 @@ func (h *handler) CreateMultipartUploadHandler(w http.ResponseWriter, r *http.Re
 		p.Header[api.ContentType] = contentType
 	}

-	p.CopiesNumbers, err = h.pickCopiesNumbers(p.Header, bktInfo.LocationConstraint)
+	p.CopiesNumber, err = getCopiesNumberOrDefault(p.Header, h.cfg.CopiesNumber)
 	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err, additional...)
+		h.logAndSendError(w, "invalid copies number", reqInfo, err)
 		return
 	}

@ -168,7 +169,7 @@ func (h *handler) CreateMultipartUploadHandler(w http.ResponseWriter, r *http.Re
 		UploadID: uploadID.String(),
 	}

-	if err = middleware.EncodeToResponse(w, resp); err != nil {
+	if err = api.EncodeToResponse(w, resp); err != nil {
 		h.logAndSendError(w, "could not encode InitiateMultipartUploadResponse to response", reqInfo, err, additional...)
 		return
 	}
@ -194,7 +195,7 @@ func formACLHeadersForMultipart(header http.Header) map[string]string {
 }

 func (h *handler) UploadPartHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -205,27 +206,15 @@ func (h *handler) UploadPartHandler(w http.ResponseWriter, r *http.Request) {
 	var (
 		queryValues = r.URL.Query()
 		uploadID    = queryValues.Get(uploadIDHeaderName)
-		partNumStr  = queryValues.Get(partNumberHeaderName)
-		additional  = []zap.Field{zap.String("uploadID", uploadID), zap.String("partNumber", partNumStr)}
+		additional  = []zap.Field{zap.String("uploadID", uploadID), zap.String("Key", reqInfo.ObjectName)}
 	)

-	partNumber, err := strconv.Atoi(partNumStr)
+	partNumber, err := strconv.Atoi(queryValues.Get(partNumberHeaderName))
 	if err != nil || partNumber < layer.UploadMinPartNumber || partNumber > layer.UploadMaxPartNumber {
-		h.logAndSendError(w, "invalid part number", reqInfo, errors.GetAPIError(errors.ErrInvalidPartNumber), additional...)
+		h.logAndSendError(w, "invalid part number", reqInfo, errors.GetAPIError(errors.ErrInvalidPartNumber))
 		return
 	}

-	body, err := h.getBodyReader(r)
-	if err != nil {
-		h.logAndSendError(w, "failed to get body reader", reqInfo, err, additional...)
-		return
-	}
-
-	var size uint64
-	if r.ContentLength > 0 {
-		size = uint64(r.ContentLength)
-	}
-
 	p := &layer.UploadPartParams{
 		Info: &layer.UploadInfoParams{
 			UploadID: uploadID,
@ -233,13 +222,13 @@ func (h *handler) UploadPartHandler(w http.ResponseWriter, r *http.Request) {
 			Key:      reqInfo.ObjectName,
 		},
 		PartNumber: partNumber,
-		Size:       size,
-		Reader:     body,
+		Size:       r.ContentLength,
+		Reader:     r.Body,
 	}

 	p.Info.Encryption, err = formEncryptionParams(r)
 	if err != nil {
-		h.logAndSendError(w, "invalid sse headers", reqInfo, err, additional...)
+		h.logAndSendError(w, "invalid sse headers", reqInfo, err)
 		return
 	}

@ -254,23 +243,21 @@ func (h *handler) UploadPartHandler(w http.ResponseWriter, r *http.Request) {
 	}

 	w.Header().Set(api.ETag, hash)
-	middleware.WriteSuccessResponseHeadersOnly(w)
+	api.WriteSuccessResponseHeadersOnly(w)
 }

 func (h *handler) UploadPartCopy(w http.ResponseWriter, r *http.Request) {
 	var (
 		versionID   string
-		ctx         = r.Context()
-		reqInfo     = middleware.GetReqInfo(ctx)
+		reqInfo     = api.GetReqInfo(r.Context())
 		queryValues = reqInfo.URL.Query()
 		uploadID    = queryValues.Get(uploadIDHeaderName)
-		partNumStr  = queryValues.Get(partNumberHeaderName)
-		additional  = []zap.Field{zap.String("uploadID", uploadID), zap.String("partNumber", partNumStr)}
+		additional  = []zap.Field{zap.String("uploadID", uploadID), zap.String("Key", reqInfo.ObjectName)}
 	)

-	partNumber, err := strconv.Atoi(partNumStr)
+	partNumber, err := strconv.Atoi(queryValues.Get(partNumberHeaderName))
 	if err != nil || partNumber < layer.UploadMinPartNumber || partNumber > layer.UploadMaxPartNumber {
-		h.logAndSendError(w, "invalid part number", reqInfo, errors.GetAPIError(errors.ErrInvalidPartNumber), additional...)
+		h.logAndSendError(w, "invalid part number", reqInfo, errors.GetAPIError(errors.ErrInvalidPartNumber))
 		return
 	}

@ -281,7 +268,7 @@ func (h *handler) UploadPartCopy(w http.ResponseWriter, r *http.Request) {
 	}
 	srcBucket, srcObject, err := path2BucketObject(src)
 	if err != nil {
-		h.logAndSendError(w, "invalid source copy", reqInfo, err, additional...)
+		h.logAndSendError(w, "invalid source copy", reqInfo, err)
 		return
 	}

@ -294,23 +281,21 @@ func (h *handler) UploadPartCopy(w http.ResponseWriter, r *http.Request) {

 	srcBktInfo, err := h.getBucketAndCheckOwner(r, srcBucket, api.AmzSourceExpectedBucketOwner)
 	if err != nil {
-		h.logAndSendError(w, "could not get source bucket info", reqInfo, err, additional...)
+		h.logAndSendError(w, "could not get source bucket info", reqInfo, err)
 		return
 	}

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
-		h.logAndSendError(w, "could not get target bucket info", reqInfo, err, additional...)
+		h.logAndSendError(w, "could not get target bucket info", reqInfo, err)
 		return
 	}

-	headPrm := &layer.HeadObjectParams{
+	srcInfo, err := h.obj.GetObjectInfo(r.Context(), &layer.HeadObjectParams{
 		BktInfo:   srcBktInfo,
 		Object:    srcObject,
 		VersionID: versionID,
-	}
-
-	srcInfo, err := h.obj.GetObjectInfo(ctx, headPrm)
+	})
 	if err != nil {
 		if errors.IsS3Error(err, errors.ErrNoSuchKey) && versionID != "" {
 			h.logAndSendError(w, "could not head source object version", reqInfo,
@ -335,7 +320,6 @@ func (h *handler) UploadPartCopy(w http.ResponseWriter, r *http.Request) {
 	}

 	p := &layer.UploadCopyParams{
-		Versioned: headPrm.Versioned(),
 		Info: &layer.UploadInfoParams{
 			UploadID: uploadID,
 			Bkt:      bktInfo,
@ -349,16 +333,16 @@ func (h *handler) UploadPartCopy(w http.ResponseWriter, r *http.Request) {

 	p.Info.Encryption, err = formEncryptionParams(r)
 	if err != nil {
-		h.logAndSendError(w, "invalid sse headers", reqInfo, err, additional...)
+		h.logAndSendError(w, "invalid sse headers", reqInfo, err)
 		return
 	}

 	if err = p.Info.Encryption.MatchObjectEncryption(layer.FormEncryptionInfo(srcInfo.Headers)); err != nil {
-		h.logAndSendError(w, "encryption doesn't match object", reqInfo, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrBadRequest), err), additional...)
+		h.logAndSendError(w, "encryption doesn't match object", reqInfo, errors.GetAPIError(errors.ErrBadRequest), zap.Error(err))
 		return
 	}

-	info, err := h.obj.UploadPartCopy(ctx, p)
+	info, err := h.obj.UploadPartCopy(r.Context(), p)
 	if err != nil {
 		h.logAndSendError(w, "could not upload part copy", reqInfo, err, additional...)
 		return
@ -373,13 +357,13 @@ func (h *handler) UploadPartCopy(w http.ResponseWriter, r *http.Request) {
 		addSSECHeaders(w.Header(), r.Header)
 	}

-	if err = middleware.EncodeToResponse(w, response); err != nil {
-		h.logAndSendError(w, "something went wrong", reqInfo, err, additional...)
+	if err = api.EncodeToResponse(w, response); err != nil {
+		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

 func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -388,17 +372,19 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 	}

 	var (
+		sessionTokenSetEACL *session.Container
+
 		uploadID   = r.URL.Query().Get(uploadIDHeaderName)
 		uploadInfo = &layer.UploadInfoParams{
 			UploadID: uploadID,
 			Bkt:      bktInfo,
 			Key:      reqInfo.ObjectName,
 		}
-		additional = []zap.Field{zap.String("uploadID", uploadID)}
+		additional = []zap.Field{zap.String("uploadID", uploadID), zap.String("Key", reqInfo.ObjectName)}
 	)

 	reqBody := new(CompleteMultipartUpload)
-	if err = h.cfg.XMLDecoder.NewCompleteMultipartDecoder(r.Body).Decode(reqBody); err != nil {
+	if err = xml.NewDecoder(r.Body).Decode(reqBody); err != nil {
 		h.logAndSendError(w, "could not read complete multipart upload xml", reqInfo,
 			errors.GetAPIError(errors.ErrMalformedXML), additional...)
 		return
@ -413,53 +399,11 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 		Parts: reqBody.Parts,
 	}

-	// Next operations might take some time, so we want to keep client's
-	// connection alive. To do so, gateway sends periodic white spaces
-	// back to the client the same way as Amazon S3 service does.
-	stopPeriodicResponseWriter := periodicXMLWriter(w, h.cfg.CompleteMultipartKeepalive)
-
-	// Start complete multipart upload which may take some time to fetch object
-	// and re-upload it part by part.
-	objInfo, err := h.completeMultipartUpload(r, c, bktInfo, reqInfo)
-
-	// Stop periodic writer as complete multipart upload is finished
-	// successfully or not.
-	headerIsWritten := stopPeriodicResponseWriter()
-
-	responseWriter := middleware.EncodeToResponse
-	errLogger := h.logAndSendError
-	// Do not send XML and HTTP headers if periodic writer was invoked at this point.
-	if headerIsWritten {
-		responseWriter = middleware.EncodeToResponseNoHeader
-		errLogger = h.logAndSendErrorNoHeader
-	}
-
+	uploadData, extendedObjInfo, err := h.obj.CompleteMultipartUpload(r.Context(), c)
 	if err != nil {
-		errLogger(w, "complete multipart error", reqInfo, err, additional...)
+		h.logAndSendError(w, "could not complete multipart upload", reqInfo, err, additional...)
 		return
 	}
-
-	response := CompleteMultipartUploadResponse{
-		Bucket: objInfo.Bucket,
-		ETag:   objInfo.HashSum,
-		Key:    objInfo.Name,
-	}
-
-	// Here we previously set api.AmzVersionID header for versioned bucket.
-	// It is not possible after #60, because of periodic white
-	// space XML writer to keep connection with the client.
-
-	if err = responseWriter(w, response); err != nil {
-		errLogger(w, "something went wrong", reqInfo, err, additional...)
-	}
-}
-
-func (h *handler) completeMultipartUpload(r *http.Request, c *layer.CompleteMultipartParams, bktInfo *data.BucketInfo, reqInfo *middleware.ReqInfo) (*data.ObjectInfo, error) {
-	ctx := r.Context()
-	uploadData, extendedObjInfo, err := h.obj.CompleteMultipartUpload(ctx, c)
-	if err != nil {
-		return nil, fmt.Errorf("could not complete multipart upload: %w", err)
-	}
 	objInfo := extendedObjInfo.ObjectInfo

 	if len(uploadData.TagSet) != 0 {
@ -472,23 +416,22 @@ func (h *handler) completeMultipartUpload(r *http.Request, c *layer.CompleteMult
 			TagSet:      uploadData.TagSet,
 			NodeVersion: extendedObjInfo.NodeVersion,
 		}
-		if _, err = h.obj.PutObjectTagging(ctx, tagPrm); err != nil {
-			return nil, fmt.Errorf("could not put tagging file of completed multipart upload: %w", err)
+		if _, err = h.obj.PutObjectTagging(r.Context(), tagPrm); err != nil {
+			h.logAndSendError(w, "could not put tagging file of completed multipart upload", reqInfo, err, additional...)
+			return
 		}
 	}

 	if len(uploadData.ACLHeaders) != 0 {
-		sessionTokenSetEACL, err := getSessionTokenSetEACL(ctx)
+		key, err := h.bearerTokenIssuerKey(r.Context())
 		if err != nil {
-			return nil, fmt.Errorf("couldn't get eacl token: %w", err)
-		}
-		key, err := h.bearerTokenIssuerKey(ctx)
-		if err != nil {
-			return nil, fmt.Errorf("couldn't get gate key: %w", err)
+			h.logAndSendError(w, "couldn't get gate key", reqInfo, err)
+			return
 		}
 		acl, err := parseACLHeaders(r.Header, key)
 		if err != nil {
-			return nil, fmt.Errorf("could not parse acl: %w", err)
+			h.logAndSendError(w, "could not parse acl", reqInfo, err)
+			return
 		}

 		resInfo := &resourceInfo{
@ -497,10 +440,12 @@ func (h *handler) completeMultipartUpload(r *http.Request, c *layer.CompleteMult
 		}
 		astObject, err := aclToAst(acl, resInfo)
 		if err != nil {
-			return nil, fmt.Errorf("could not translate acl of completed multipart upload to ast: %w", err)
+			h.logAndSendError(w, "could not translate acl of completed multipart upload to ast", reqInfo, err, additional...)
+			return
 		}
 		if _, err = h.updateBucketACL(r, astObject, bktInfo, sessionTokenSetEACL); err != nil {
-			return nil, fmt.Errorf("could not update bucket acl while completing multipart upload: %w", err)
+			h.logAndSendError(w, "could not update bucket acl while completing multipart upload", reqInfo, err, additional...)
+			return
 		}
 	}

@ -510,15 +455,32 @@ func (h *handler) completeMultipartUpload(r *http.Request, c *layer.CompleteMult
 		BktInfo:          bktInfo,
 		ReqInfo:          reqInfo,
 	}
-	if err = h.sendNotifications(ctx, s); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), s); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

-	return objInfo, nil
+	bktSettings, err := h.obj.GetBucketSettings(r.Context(), bktInfo)
+	if err != nil {
+		h.logAndSendError(w, "could not get bucket settings", reqInfo, err)
+	}
+
+	response := CompleteMultipartUploadResponse{
+		Bucket: objInfo.Bucket,
+		ETag:   objInfo.HashSum,
+		Key:    objInfo.Name,
+	}
+
+	if bktSettings.VersioningEnabled() {
+		w.Header().Set(api.AmzVersionID, objInfo.VersionID())
+	}
+
+	if err = api.EncodeToResponse(w, response); err != nil {
+		h.logAndSendError(w, "something went wrong", reqInfo, err)
+	}
 }

 func (h *handler) ListMultipartUploadsHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -560,13 +522,13 @@ func (h *handler) ListMultipartUploadsHandler(w http.ResponseWriter, r *http.Req
 		return
 	}

-	if err = middleware.EncodeToResponse(w, encodeListMultipartUploadsToResponse(list, p)); err != nil {
+	if err = api.EncodeToResponse(w, encodeListMultipartUploadsToResponse(list, p)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

 func (h *handler) ListPartsHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -623,13 +585,13 @@ func (h *handler) ListPartsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	if err = middleware.EncodeToResponse(w, encodeListPartsToResponse(list, p)); err != nil {
+	if err = api.EncodeToResponse(w, encodeListPartsToResponse(list, p)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

 func (h *handler) AbortMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -719,53 +681,3 @@ func encodeListPartsToResponse(info *layer.ListPartsInfo, params *layer.ListPart
 		Parts:            info.Parts,
 	}
 }
-
-// periodicXMLWriter creates go routine to write xml header and whitespaces
-// over time to avoid connection drop from the client. To work properly,
-// pass `http.ResponseWriter` with implemented `http.Flusher` interface.
-// Returns stop function which returns boolean if writer has been used
-// during goroutine execution. To disable writer, pass 0 duration value.
-func periodicXMLWriter(w io.Writer, dur time.Duration) (stop func() bool) {
-	if dur == 0 { // 0 duration disables periodic writer
-		return func() bool { return false }
-	}
-
-	whitespaceChar := []byte(" ")
-	closer := make(chan struct{})
-	done := make(chan struct{})
-	headerWritten := false
-
-	go func() {
-		defer close(done)
-
-		tick := time.NewTicker(dur)
-		defer tick.Stop()
-
-		for {
-			select {
-			case <-tick.C:
-				if !headerWritten {
-					_, err := w.Write([]byte(xml.Header))
-					headerWritten = err == nil
-				}
-				_, err := w.Write(whitespaceChar)
-				if err != nil {
-					return // is there anything we can do better than ignore error?
-				}
-				if buffered, ok := w.(http.Flusher); ok {
-					buffered.Flush()
-				}
-			case <-closer:
-				return
-			}
-		}
-	}()
-
-	stop = func() bool {
-		close(closer)
-		<-done // wait for goroutine to stop
-		return headerWritten
-	}
-
-	return stop
-}
--- a/api/handler/multipart_upload_test.go
+++ b/api/handler/multipart_upload_test.go
@ -1,126 +0,0 @@
-package handler
-
-import (
-	"bytes"
-	"encoding/xml"
-	"net/http"
-	"net/url"
-	"testing"
-	"time"
-
-	s3Errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"github.com/stretchr/testify/require"
-)
-
-func TestPeriodicWriter(t *testing.T) {
-	const dur = 100 * time.Millisecond
-	const whitespaces = 8
-	expected := []byte(xml.Header)
-	for i := 0; i < whitespaces; i++ {
-		expected = append(expected, []byte(" ")...)
-	}
-
-	t.Run("writes data", func(t *testing.T) {
-		buf := bytes.NewBuffer(nil)
-		stop := periodicXMLWriter(buf, dur)
-
-		// N number of whitespaces + half durations to guarantee at least N writes in buffer
-		time.Sleep(whitespaces*dur + dur/2)
-		require.True(t, stop())
-		require.Equal(t, expected, buf.Bytes())
-
-		t.Run("no additional data after stop", func(t *testing.T) {
-			time.Sleep(2 * dur)
-			require.Equal(t, expected, buf.Bytes())
-		})
-	})
-
-	t.Run("does not write data", func(t *testing.T) {
-		buf := bytes.NewBuffer(nil)
-		stop := periodicXMLWriter(buf, dur)
-		time.Sleep(dur / 2)
-		require.False(t, stop())
-		require.Empty(t, buf.Bytes())
-
-		t.Run("disabled", func(t *testing.T) {
-			stop = periodicXMLWriter(buf, 0)
-			require.False(t, stop())
-			require.Empty(t, buf.Bytes())
-		})
-	})
-}
-
-func TestMultipartUploadInvalidPart(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-to-upload-part", "object-multipart"
-	createTestBucket(hc, bktName)
-	partSize := 8 // less than min part size
-
-	multipartUpload := createMultipartUpload(hc, bktName, objName, map[string]string{})
-	etag1, _ := uploadPart(hc, bktName, objName, multipartUpload.UploadID, 1, partSize)
-	etag2, _ := uploadPart(hc, bktName, objName, multipartUpload.UploadID, 2, partSize)
-	w := completeMultipartUploadBase(hc, bktName, objName, multipartUpload.UploadID, []string{etag1, etag2})
-	assertS3Error(hc.t, w, s3Errors.GetAPIError(s3Errors.ErrEntityTooSmall))
-}
-
-func TestMultipartReUploadPart(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-to-upload-part", "object-multipart"
-	bktInfo := createTestBucket(hc, bktName)
-	partSizeLast := 8 // less than min part size
-	partSizeFirst := 5 * 1024 * 1024
-
-	uploadInfo := createMultipartUpload(hc, bktName, objName, map[string]string{})
-	etag1, _ := uploadPart(hc, bktName, objName, uploadInfo.UploadID, 1, partSizeLast)
-	etag2, _ := uploadPart(hc, bktName, objName, uploadInfo.UploadID, 2, partSizeFirst)
-
-	list := listParts(hc, bktName, objName, uploadInfo.UploadID)
-	require.Len(t, list.Parts, 2)
-	require.Equal(t, etag1, list.Parts[0].ETag)
-	require.Equal(t, etag2, list.Parts[1].ETag)
-
-	w := completeMultipartUploadBase(hc, bktName, objName, uploadInfo.UploadID, []string{etag1, etag2})
-	assertS3Error(hc.t, w, s3Errors.GetAPIError(s3Errors.ErrEntityTooSmall))
-
-	etag1, data1 := uploadPart(hc, bktName, objName, uploadInfo.UploadID, 1, partSizeFirst)
-	etag2, data2 := uploadPart(hc, bktName, objName, uploadInfo.UploadID, 2, partSizeLast)
-
-	list = listParts(hc, bktName, objName, uploadInfo.UploadID)
-	require.Len(t, list.Parts, 2)
-	require.Equal(t, etag1, list.Parts[0].ETag)
-	require.Equal(t, etag2, list.Parts[1].ETag)
-
-	innerUploadInfo, err := hc.tree.GetMultipartUpload(hc.context, bktInfo, objName, uploadInfo.UploadID)
-	require.NoError(t, err)
-	treeParts, err := hc.tree.GetParts(hc.Context(), bktInfo, innerUploadInfo.ID)
-	require.NoError(t, err)
-	require.Len(t, treeParts, len(list.Parts))
-
-	w = completeMultipartUploadBase(hc, bktName, objName, uploadInfo.UploadID, []string{etag1, etag2})
-	assertStatus(hc.t, w, http.StatusOK)
-
-	data, _ := getObject(hc, bktName, objName)
-	equalDataSlices(t, append(data1, data2...), data)
-}
-
-func listParts(hc *handlerContext, bktName, objName string, uploadID string) *ListPartsResponse {
-	return listPartsBase(hc, bktName, objName, false, uploadID)
-}
-
-func listPartsBase(hc *handlerContext, bktName, objName string, encrypted bool, uploadID string) *ListPartsResponse {
-	query := make(url.Values)
-	query.Set(uploadIDQuery, uploadID)
-
-	w, r := prepareTestRequestWithQuery(hc, bktName, objName, query, nil)
-	if encrypted {
-		setEncryptHeaders(r)
-	}
-
-	hc.Handler().ListPartsHandler(w, r)
-	listPartsResponse := &ListPartsResponse{}
-	readResponse(hc.t, w, http.StatusOK, listPartsResponse)
-
-	return listPartsResponse
-}
--- a/api/handler/not_support.go
+++ b/api/handler/not_support.go
@ -3,18 +3,18 @@ package handler
 import (
 	"net/http"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 )

 func (h *handler) DeleteBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not supported", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotSupported))
+	h.logAndSendError(w, "not supported", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotSupported))
 }

 func (h *handler) DeleteBucketLifecycleHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not supported", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotSupported))
+	h.logAndSendError(w, "not supported", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotSupported))
 }

 func (h *handler) DeleteBucketEncryptionHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not supported", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotSupported))
+	h.logAndSendError(w, "not supported", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotSupported))
 }
--- a/api/handler/notifications.go
+++ b/api/handler/notifications.go
@ -8,11 +8,11 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
 	"github.com/google/uuid"
 )

@ -21,7 +21,7 @@ type (
 		Event            string
 		NotificationInfo *data.NotificationInfo
 		BktInfo          *data.BucketInfo
-		ReqInfo          *middleware.ReqInfo
+		ReqInfo          *api.ReqInfo
 		User             string
 		Time             time.Time
 	}
@ -96,7 +96,7 @@ var validEvents = map[string]struct{}{
 }

 func (h *handler) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket info", reqInfo, err)
@ -118,12 +118,7 @@ func (h *handler) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Re
 		RequestInfo:   reqInfo,
 		BktInfo:       bktInfo,
 		Configuration: conf,
-	}
-
-	p.CopiesNumbers, err = h.pickCopiesNumbers(parseMetadata(r), bktInfo.LocationConstraint)
-	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err)
-		return
+		CopiesNumber:  h.cfg.CopiesNumber,
 	}

 	if err = h.obj.PutBucketNotificationConfiguration(r.Context(), p); err != nil {
@ -133,7 +128,7 @@ func (h *handler) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Re
 }

 func (h *handler) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -147,7 +142,7 @@ func (h *handler) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Re
 		return
 	}

-	if err = middleware.EncodeToResponse(w, conf); err != nil {
+	if err = api.EncodeToResponse(w, conf); err != nil {
 		h.logAndSendError(w, "could not encode bucket notification configuration to response", reqInfo, err)
 		return
 	}
@ -179,7 +174,7 @@ func (h *handler) sendNotifications(ctx context.Context, p *SendNotificationPara
 }

 // checkBucketConfiguration checks notification configuration and generates an ID for configurations with empty ids.
-func (h *handler) checkBucketConfiguration(ctx context.Context, conf *data.NotificationConfiguration, r *middleware.ReqInfo) (completed bool, err error) {
+func (h *handler) checkBucketConfiguration(ctx context.Context, conf *data.NotificationConfiguration, r *api.ReqInfo) (completed bool, err error) {
 	if conf == nil {
 		return
 	}
@ -202,7 +197,7 @@ func (h *handler) checkBucketConfiguration(ctx context.Context, conf *data.Notif
 				return
 			}
 		} else {
-			h.reqLogger(ctx).Warn("failed to send test event because notifications is disabled")
+			h.log.Warn("failed to send test event because notifications is disabled")
 		}

 		if q.ID == "" {
--- a/api/handler/notifications_test.go
+++ b/api/handler/notifications_test.go
@ -3,8 +3,8 @@ package handler
 import (
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"github.com/stretchr/testify/require"
 )

--- a/api/handler/object_list.go
+++ b/api/handler/object_list.go
@ -6,16 +6,16 @@ import (
 	"strconv"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 )

 // ListObjectsV1Handler handles objects listing requests for API version 1.
 func (h *handler) ListObjectsV1Handler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	params, err := parseListObjectsArgsV1(reqInfo)
 	if err != nil {
 		h.logAndSendError(w, "failed to parse arguments", reqInfo, err)
@ -33,7 +33,7 @@ func (h *handler) ListObjectsV1Handler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	if err = middleware.EncodeToResponse(w, encodeV1(params, list)); err != nil {
+	if err = api.EncodeToResponse(w, encodeV1(params, list)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }
@ -59,7 +59,7 @@ func encodeV1(p *layer.ListObjectsParamsV1, list *layer.ListObjectsInfoV1) *List

 // ListObjectsV2Handler handles objects listing requests for API version 2.
 func (h *handler) ListObjectsV2Handler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	params, err := parseListObjectsArgsV2(reqInfo)
 	if err != nil {
 		h.logAndSendError(w, "failed to parse arguments", reqInfo, err)
@ -77,7 +77,7 @@ func (h *handler) ListObjectsV2Handler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	if err = middleware.EncodeToResponse(w, encodeV2(params, list)); err != nil {
+	if err = api.EncodeToResponse(w, encodeV2(params, list)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }
@ -103,7 +103,7 @@ func encodeV2(p *layer.ListObjectsParamsV2, list *layer.ListObjectsInfoV2) *List
 	return res
 }

-func parseListObjectsArgsV1(reqInfo *middleware.ReqInfo) (*layer.ListObjectsParamsV1, error) {
+func parseListObjectsArgsV1(reqInfo *api.ReqInfo) (*layer.ListObjectsParamsV1, error) {
 	var (
 		res         layer.ListObjectsParamsV1
 		queryValues = reqInfo.URL.Query()
@ -120,7 +120,7 @@ func parseListObjectsArgsV1(reqInfo *middleware.ReqInfo) (*layer.ListObjectsPara
 	return &res, nil
 }

-func parseListObjectsArgsV2(reqInfo *middleware.ReqInfo) (*layer.ListObjectsParamsV2, error) {
+func parseListObjectsArgsV2(reqInfo *api.ReqInfo) (*layer.ListObjectsParamsV2, error) {
 	var (
 		res         layer.ListObjectsParamsV2
 		queryValues = reqInfo.URL.Query()
@ -142,7 +142,7 @@ func parseListObjectsArgsV2(reqInfo *middleware.ReqInfo) (*layer.ListObjectsPara
 	return &res, nil
 }

-func parseListObjectArgs(reqInfo *middleware.ReqInfo) (*layer.ListObjectsParamsCommon, error) {
+func parseListObjectArgs(reqInfo *api.ReqInfo) (*layer.ListObjectsParamsCommon, error) {
 	var (
 		err         error
 		res         layer.ListObjectsParamsCommon
@ -211,7 +211,7 @@ func fillContents(src []*data.ObjectInfo, encode string, fetchOwner bool) []Obje
 }

 func (h *handler) ListBucketObjectVersionsHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())
 	p, err := parseListObjectVersionsRequest(reqInfo)
 	if err != nil {
 		h.logAndSendError(w, "failed to parse request", reqInfo, err)
@ -230,12 +230,12 @@ func (h *handler) ListBucketObjectVersionsHandler(w http.ResponseWriter, r *http
 	}

 	response := encodeListObjectVersionsToResponse(info, p.BktInfo.Name)
-	if err = middleware.EncodeToResponse(w, response); err != nil {
+	if err = api.EncodeToResponse(w, response); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

-func parseListObjectVersionsRequest(reqInfo *middleware.ReqInfo) (*layer.ListObjectVersionsParams, error) {
+func parseListObjectVersionsRequest(reqInfo *api.ReqInfo) (*layer.ListObjectVersionsParams, error) {
 	var (
 		err         error
 		res         layer.ListObjectVersionsParams
--- a/api/handler/object_list_test.go
+++ b/api/handler/object_list_test.go
@ -6,7 +6,7 @@ import (
 	"strconv"
 	"testing"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 	"github.com/stretchr/testify/require"
 )

--- a/api/handler/put.go
+++ b/api/handler/put.go
@ -16,16 +16,15 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/auth"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"go.uber.org/zap"
 )

@ -44,13 +43,13 @@ func (p *postPolicy) condition(key string) *policyCondition {
 	return nil
 }

-func (p *postPolicy) CheckContentLength(size uint64) bool {
+func (p *postPolicy) CheckContentLength(size int64) bool {
 	if p.empty {
 		return true
 	}
 	for _, condition := range p.Conditions {
 		if condition.Matching == "content-length-range" {
-			length := strconv.FormatUint(size, 10)
+			length := strconv.FormatInt(size, 10)
 			return condition.Key <= length && length <= condition.Value
 		}
 	}
@ -180,8 +179,7 @@ func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 		newEaclTable     *eacl.Table
 		sessionTokenEACL *session.Container
 		containsACL      = containsACLHeaders(r)
-		ctx              = r.Context()
-		reqInfo          = middleware.GetReqInfo(ctx)
+		reqInfo          = api.GetReqInfo(r.Context())
 	)

 	if containsACL {
@ -214,57 +212,44 @@ func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 		metadata[api.Expires] = expires
 	}

+	copiesNumber, err := getCopiesNumberOrDefault(metadata, h.cfg.CopiesNumber)
+	if err != nil {
+		h.logAndSendError(w, "invalid copies number", reqInfo, err)
+		return
+	}
+
 	encryptionParams, err := formEncryptionParams(r)
 	if err != nil {
 		h.logAndSendError(w, "invalid sse headers", reqInfo, err)
 		return
 	}

-	body, err := h.getBodyReader(r)
-	if err != nil {
-		h.logAndSendError(w, "failed to get body reader", reqInfo, err)
-		return
-	}
-	if encodings := r.Header.Get(api.ContentEncoding); len(encodings) > 0 {
-		metadata[api.ContentEncoding] = encodings
-	}
-
-	var size uint64
-	if r.ContentLength > 0 {
-		size = uint64(r.ContentLength)
-	}
-
 	params := &layer.PutObjectParams{
 		BktInfo:      bktInfo,
 		Object:       reqInfo.ObjectName,
-		Reader:     body,
-		Size:       size,
+		Reader:       r.Body,
+		Size:         r.ContentLength,
 		Header:       metadata,
 		Encryption:   encryptionParams,
+		CopiesNumber: copiesNumber,
 	}

-	params.CopiesNumbers, err = h.pickCopiesNumbers(metadata, bktInfo.LocationConstraint)
-	if err != nil {
-		h.logAndSendError(w, "invalid copies number", reqInfo, err)
-		return
-	}
-
-	settings, err := h.obj.GetBucketSettings(ctx, bktInfo)
+	settings, err := h.obj.GetBucketSettings(r.Context(), bktInfo)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket settings", reqInfo, err)
 		return
 	}

-	params.Lock, err = formObjectLock(ctx, bktInfo, settings.LockConfiguration, r.Header)
+	params.Lock, err = formObjectLock(r.Context(), bktInfo, settings.LockConfiguration, r.Header)
 	if err != nil {
 		h.logAndSendError(w, "could not form object lock", reqInfo, err)
 		return
 	}

-	extendedObjInfo, err := h.obj.PutObject(ctx, params)
+	extendedObjInfo, err := h.obj.PutObject(r.Context(), params)
 	if err != nil {
-		_, err2 := io.Copy(io.Discard, body)
-		err3 := body.Close()
+		_, err2 := io.Copy(io.Discard, r.Body)
+		err3 := r.Body.Close()
 		h.logAndSendError(w, "could not upload object", reqInfo, err, zap.Errors("body close errors", []error{err2, err3}))
 		return
 	}
@ -276,8 +261,8 @@ func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 		BktInfo:          bktInfo,
 		ReqInfo:          reqInfo,
 	}
-	if err = h.sendNotifications(ctx, s); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), s); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

 	if containsACL {
@ -324,49 +309,21 @@ func (h *handler) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 	}

 	w.Header().Set(api.ETag, objInfo.HashSum)
-	middleware.WriteSuccessResponseHeadersOnly(w)
+	api.WriteSuccessResponseHeadersOnly(w)
 }

-func (h *handler) getBodyReader(r *http.Request) (io.ReadCloser, error) {
-	if !api.IsSignedStreamingV4(r) {
-		return r.Body, nil
+func getCopiesNumberOrDefault(metadata map[string]string, defaultCopiesNumber uint32) (uint32, error) {
+	copiesNumberStr, ok := metadata[layer.AttributeFrostfsCopiesNumber]
+	if !ok {
+		return defaultCopiesNumber, nil
 	}

-	encodings := r.Header.Values(api.ContentEncoding)
-	var chunkedEncoding bool
-	resultContentEncoding := make([]string, 0, len(encodings))
-	for _, enc := range encodings {
-		for _, e := range strings.Split(enc, ",") {
-			e = strings.TrimSpace(e)
-			if e == api.AwsChunked { // probably we should also check position of this header value
-				chunkedEncoding = true
-			} else {
-				resultContentEncoding = append(resultContentEncoding, e)
-			}
-		}
-	}
-	r.Header.Set(api.ContentEncoding, strings.Join(resultContentEncoding, ","))
-
-	if !chunkedEncoding && !h.cfg.Kludge.BypassContentEncodingInChunks() {
-		return nil, fmt.Errorf("%w: request is not chunk encoded, encodings '%s'",
-			errors.GetAPIError(errors.ErrInvalidEncodingMethod), strings.Join(encodings, ","))
-	}
-
-	decodeContentSize := r.Header.Get(api.AmzDecodedContentLength)
-	if len(decodeContentSize) == 0 {
-		return nil, errors.GetAPIError(errors.ErrMissingContentLength)
-	}
-
-	if _, err := strconv.Atoi(decodeContentSize); err != nil {
-		return nil, fmt.Errorf("%w: parse decoded content length: %s", errors.GetAPIError(errors.ErrMissingContentLength), err.Error())
-	}
-
-	chunkReader, err := newSignV4ChunkedReader(r)
+	copiesNumber, err := strconv.ParseUint(copiesNumberStr, 10, 32)
 	if err != nil {
-		return nil, fmt.Errorf("initialize chunk reader: %w", err)
+		return 0, fmt.Errorf("pasrse copies number: %w", err)
 	}

-	return chunkReader, nil
+	return uint32(copiesNumber), nil
 }

 func formEncryptionParams(r *http.Request) (enc encryption.Params, err error) {
@ -418,8 +375,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 		newEaclTable     *eacl.Table
 		tagSet           map[string]string
 		sessionTokenEACL *session.Container
-		ctx              = r.Context()
-		reqInfo          = middleware.GetReqInfo(ctx)
+		reqInfo          = api.GetReqInfo(r.Context())
 		metadata         = make(map[string]string)
 		containsACL      = containsACLHeaders(r)
 	)
@ -440,17 +396,17 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 	}

 	if containsACL {
-		if sessionTokenEACL, err = getSessionTokenSetEACL(ctx); err != nil {
+		if sessionTokenEACL, err = getSessionTokenSetEACL(r.Context()); err != nil {
 			h.logAndSendError(w, "could not get eacl session token from a box", reqInfo, err)
 			return
 		}
 	}

 	var contentReader io.Reader
-	var size uint64
+	var size int64
 	if content, ok := r.MultipartForm.Value["file"]; ok {
 		contentReader = bytes.NewBufferString(content[0])
-		size = uint64(len(content[0]))
+		size = int64(len(content[0]))
 	} else {
 		file, head, err := r.FormFile("file")
 		if err != nil {
@ -458,7 +414,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		contentReader = file
-		size = uint64(head.Size)
+		size = head.Size
 		reqInfo.ObjectName = strings.ReplaceAll(reqInfo.ObjectName, "${filename}", head.Filename)
 	}
 	if !policy.CheckContentLength(size) {
@ -466,7 +422,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	bktInfo, err := h.obj.GetBucketInfo(ctx, reqInfo.BucketName)
+	bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket info", reqInfo, err)
 		return
@ -480,7 +436,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 		Header:  metadata,
 	}

-	extendedObjInfo, err := h.obj.PutObject(ctx, params)
+	extendedObjInfo, err := h.obj.PutObject(r.Context(), params)
 	if err != nil {
 		h.logAndSendError(w, "could not upload object", reqInfo, err)
 		return
@ -493,8 +449,8 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 		BktInfo:          bktInfo,
 		ReqInfo:          reqInfo,
 	}
-	if err = h.sendNotifications(ctx, s); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), s); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

 	if acl := auth.MultipartFormValue(r, "acl"); acl != "" {
@ -519,7 +475,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 			NodeVersion: extendedObjInfo.NodeVersion,
 		}

-		if _, err = h.obj.PutObjectTagging(ctx, tagPrm); err != nil {
+		if _, err = h.obj.PutObjectTagging(r.Context(), tagPrm); err != nil {
 			h.logAndSendError(w, "could not upload object tagging", reqInfo, err)
 			return
 		}
@ -532,14 +488,14 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 			SessionToken: sessionTokenEACL,
 		}

-		if err = h.obj.PutBucketACL(ctx, p); err != nil {
+		if err = h.obj.PutBucketACL(r.Context(), p); err != nil {
 			h.logAndSendError(w, "could not put bucket acl", reqInfo, err)
 			return
 		}
 	}

-	if settings, err := h.obj.GetBucketSettings(ctx, bktInfo); err != nil {
-		h.reqLogger(ctx).Warn("couldn't get bucket versioning", zap.String("bucket name", reqInfo.BucketName), zap.Error(err))
+	if settings, err := h.obj.GetBucketSettings(r.Context(), bktInfo); err != nil {
+		h.log.Warn("couldn't get bucket versioning", zap.String("bucket name", reqInfo.BucketName), zap.Error(err))
 	} else if settings.VersioningEnabled() {
 		w.Header().Set(api.AmzVersionID, objInfo.VersionID())
 	}
@ -561,7 +517,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 				ETag:   objInfo.HashSum,
 			}
 			w.WriteHeader(status)
-			if _, err = w.Write(middleware.EncodeResponse(resp)); err != nil {
+			if _, err = w.Write(api.EncodeResponse(resp)); err != nil {
 				h.logAndSendError(w, "something went wrong", reqInfo, err)
 			}
 			return
@ -572,7 +528,7 @@ func (h *handler) PostObject(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(status)
 }

-func checkPostPolicy(r *http.Request, reqInfo *middleware.ReqInfo, metadata map[string]string) (*postPolicy, error) {
+func checkPostPolicy(r *http.Request, reqInfo *api.ReqInfo, metadata map[string]string) (*postPolicy, error) {
 	policy := &postPolicy{empty: true}
 	if policyStr := auth.MultipartFormValue(r, "policy"); policyStr != "" {
 		policyData, err := base64.StdEncoding.DecodeString(policyStr)
@ -711,8 +667,7 @@ func parseMetadata(r *http.Request) map[string]string {
 }

 func (h *handler) CreateBucketHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())
 	p := &layer.CreateBucketParams{
 		Name: reqInfo.BucketName,
 	}
@ -722,7 +677,7 @@ func (h *handler) CreateBucketHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}

-	key, err := h.bearerTokenIssuerKey(ctx)
+	key, err := h.bearerTokenIssuerKey(r.Context())
 	if err != nil {
 		h.logAndSendError(w, "couldn't get bearer token signature key", reqInfo, err)
 		return
@ -748,7 +703,7 @@ func (h *handler) CreateBucketHandler(w http.ResponseWriter, r *http.Request) {
 	}

 	var policies []*accessbox.ContainerPolicy
-	boxData, err := layer.GetBoxData(ctx)
+	boxData, err := layer.GetBoxData(r.Context())
 	if err == nil {
 		policies = boxData.Policies
 		p.SessionContainerCreation = boxData.Gate.SessionTokenForPut()
@ -772,31 +727,32 @@ func (h *handler) CreateBucketHandler(w http.ResponseWriter, r *http.Request) {

 	p.ObjectLockEnabled = isLockEnabled(r.Header)

-	bktInfo, err := h.obj.CreateBucket(ctx, p)
+	bktInfo, err := h.obj.CreateBucket(r.Context(), p)
 	if err != nil {
 		h.logAndSendError(w, "could not create bucket", reqInfo, err)
 		return
 	}

-	h.reqLogger(ctx).Info("bucket is created", zap.Stringer("container_id", bktInfo.CID))
+	h.log.Info("bucket is created", zap.String("reqId", reqInfo.RequestID),
+		zap.String("bucket", reqInfo.BucketName), zap.Stringer("container_id", bktInfo.CID))

 	if p.ObjectLockEnabled {
 		sp := &layer.PutSettingsParams{
 			BktInfo:  bktInfo,
 			Settings: &data.BucketSettings{Versioning: data.VersioningEnabled},
 		}
-		if err = h.obj.PutBucketSettings(ctx, sp); err != nil {
+		if err = h.obj.PutBucketSettings(r.Context(), sp); err != nil {
 			h.logAndSendError(w, "couldn't enable bucket versioning", reqInfo, err,
 				zap.String("container_id", bktInfo.CID.EncodeToString()))
 			return
 		}
 	}

-	middleware.WriteSuccessResponseHeadersOnly(w)
+	api.WriteSuccessResponseHeadersOnly(w)
 }

 func (h handler) setPolicy(prm *layer.CreateBucketParams, locationConstraint string, userPolicies []*accessbox.ContainerPolicy) error {
-	prm.Policy = h.cfg.Policy.DefaultPlacementPolicy()
+	prm.Policy = h.cfg.Policy.Default()
 	prm.LocationConstraint = locationConstraint

 	if locationConstraint == "" {
@ -810,7 +766,7 @@ func (h handler) setPolicy(prm *layer.CreateBucketParams, locationConstraint str
 		}
 	}

-	if policy, ok := h.cfg.Policy.PlacementPolicy(locationConstraint); ok {
+	if policy, ok := h.cfg.Policy.Get(locationConstraint); ok {
 		prm.Policy = policy
 		return nil
 	}
--- a/api/handler/put_test.go
+++ b/api/handler/put_test.go
@ -1,26 +1,15 @@
 package handler

 import (
-	"bytes"
-	"context"
 	"encoding/json"
-	"io"
 	"mime/multipart"
 	"net/http"
-	"net/http/httptest"
-	"strconv"
 	"strings"
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
-	v4 "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth/signer/v4"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"github.com/stretchr/testify/require"
 )

@ -111,7 +100,7 @@ func TestEmptyPostPolicy(t *testing.T) {
 			},
 		},
 	}
-	reqInfo := &middleware.ReqInfo{}
+	reqInfo := &api.ReqInfo{}
 	metadata := make(map[string]string)

 	_, err := checkPostPolicy(r, reqInfo, metadata)
@ -137,154 +126,3 @@ func TestPutObjectOverrideCopiesNumber(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, "1", objInfo.Headers[layer.AttributeFrostfsCopiesNumber])
 }
-
-func TestPutObjectWithNegativeContentLength(t *testing.T) {
-	tc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-put", "object-for-put"
-	createTestBucket(tc, bktName)
-
-	content := []byte("content")
-	w, r := prepareTestPayloadRequest(tc, bktName, objName, bytes.NewReader(content))
-	r.ContentLength = -1
-	tc.Handler().PutObjectHandler(w, r)
-	assertStatus(t, w, http.StatusOK)
-
-	w, r = prepareTestRequest(tc, bktName, objName, nil)
-	tc.Handler().HeadObjectHandler(w, r)
-	assertStatus(t, w, http.StatusOK)
-	require.Equal(t, strconv.Itoa(len(content)), w.Header().Get(api.ContentLength))
-}
-
-func TestPutObjectWithStreamBodyError(t *testing.T) {
-	tc := prepareHandlerContext(t)
-
-	bktName, objName := "bucket-for-put", "object-for-put"
-	createTestBucket(tc, bktName)
-
-	content := []byte("content")
-	w, r := prepareTestPayloadRequest(tc, bktName, objName, bytes.NewReader(content))
-	r.Header.Set(api.AmzContentSha256, api.StreamingContentSHA256)
-	r.Header.Set(api.ContentEncoding, api.AwsChunked)
-	tc.Handler().PutObjectHandler(w, r)
-	assertS3Error(t, w, s3errors.GetAPIError(s3errors.ErrMissingContentLength))
-
-	checkNotFound(t, tc, bktName, objName, emptyVersion)
-}
-
-func TestPutObjectWithStreamBodyAWSExample(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "examplebucket", "chunkObject.txt"
-	createTestBucket(hc, bktName)
-
-	w, req, chunk := getChunkedRequest(hc.context, t, bktName, objName)
-	hc.Handler().PutObjectHandler(w, req)
-	assertStatus(t, w, http.StatusOK)
-
-	data := getObjectRange(t, hc, bktName, objName, 0, 66824)
-	for i := range chunk {
-		require.Equal(t, chunk[i], data[i])
-	}
-}
-
-func TestPutChunkedTestContentEncoding(t *testing.T) {
-	hc := prepareHandlerContext(t)
-
-	bktName, objName := "examplebucket", "chunkObject.txt"
-	createTestBucket(hc, bktName)
-
-	w, req, _ := getChunkedRequest(hc.context, t, bktName, objName)
-	req.Header.Set(api.ContentEncoding, api.AwsChunked+",gzip")
-
-	hc.Handler().PutObjectHandler(w, req)
-	assertStatus(t, w, http.StatusOK)
-
-	resp := headObjectBase(hc, bktName, objName, emptyVersion)
-	require.Equal(t, "gzip", resp.Header().Get(api.ContentEncoding))
-
-	w, req, _ = getChunkedRequest(hc.context, t, bktName, objName)
-	req.Header.Set(api.ContentEncoding, "gzip")
-	hc.Handler().PutObjectHandler(w, req)
-	assertS3Error(t, w, s3errors.GetAPIError(s3errors.ErrInvalidEncodingMethod))
-
-	hc.kludge.bypassContentEncodingInChunks = true
-	w, req, _ = getChunkedRequest(hc.context, t, bktName, objName)
-	req.Header.Set(api.ContentEncoding, "gzip")
-	hc.Handler().PutObjectHandler(w, req)
-	assertStatus(t, w, http.StatusOK)
-
-	resp = headObjectBase(hc, bktName, objName, emptyVersion)
-	require.Equal(t, "gzip", resp.Header().Get(api.ContentEncoding))
-}
-
-func getChunkedRequest(ctx context.Context, t *testing.T, bktName, objName string) (*httptest.ResponseRecorder, *http.Request, []byte) {
-	chunk := make([]byte, 65*1024)
-	for i := range chunk {
-		chunk[i] = 'a'
-	}
-	chunk1 := chunk[:64*1024]
-	chunk2 := chunk[64*1024:]
-
-	AWSAccessKeyID := "AKIAIOSFODNN7EXAMPLE"
-	AWSSecretAccessKey := "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
-
-	awsCreds := credentials.NewStaticCredentials(AWSAccessKeyID, AWSSecretAccessKey, "")
-	signer := v4.NewSigner(awsCreds)
-
-	reqBody := bytes.NewBufferString("10000;chunk-signature=ad80c730a21e5b8d04586a2213dd63b9a0e99e0e2307b0ade35a65485a288648\r\n")
-	_, err := reqBody.Write(chunk1)
-	require.NoError(t, err)
-	_, err = reqBody.WriteString("\r\n400;chunk-signature=0055627c9e194cb4542bae2aa5492e3c1575bbb81b612b7d234b86a503ef5497\r\n")
-	require.NoError(t, err)
-	_, err = reqBody.Write(chunk2)
-	require.NoError(t, err)
-	_, err = reqBody.WriteString("\r\n0;chunk-signature=b6c6ea8a5354eaf15b3cb7646744f4275b71ea724fed81ceb9323e279d449df9\r\n\r\n")
-	require.NoError(t, err)
-
-	req, err := http.NewRequest("PUT", "https://s3.amazonaws.com/"+bktName+"/"+objName, nil)
-	require.NoError(t, err)
-	req.Header.Set("content-encoding", "aws-chunked")
-	req.Header.Set("content-length", "66824")
-	req.Header.Set("x-amz-content-sha256", "STREAMING-AWS4-HMAC-SHA256-PAYLOAD")
-	req.Header.Set("x-amz-decoded-content-length", "66560")
-	req.Header.Set("x-amz-storage-class", "REDUCED_REDUNDANCY")
-
-	signTime, err := time.Parse("20060102T150405Z", "20130524T000000Z")
-	require.NoError(t, err)
-
-	_, err = signer.Sign(req, nil, "s3", "us-east-1", signTime)
-	require.NoError(t, err)
-
-	req.Body = io.NopCloser(reqBody)
-
-	w := httptest.NewRecorder()
-	reqInfo := middleware.NewReqInfo(w, req, middleware.ObjectRequest{Bucket: bktName, Object: objName})
-	req = req.WithContext(middleware.SetReqInfo(ctx, reqInfo))
-	req = req.WithContext(context.WithValue(req.Context(), middleware.ClientTime, signTime))
-	req = req.WithContext(context.WithValue(req.Context(), middleware.AuthHeaders, &auth.AuthHeader{
-		AccessKeyID: AWSAccessKeyID,
-		SignatureV4: "4f232c4386841ef735655705268965c44a0e4690baa4adea153f7db9fa80a0a9",
-		Service:     "s3",
-		Region:      "us-east-1",
-	}))
-	req = req.WithContext(context.WithValue(req.Context(), middleware.BoxData, &accessbox.Box{
-		Gate: &accessbox.GateData{
-			AccessKey: AWSSecretAccessKey,
-		},
-	}))
-
-	return w, req, chunk
-}
-
-func TestCreateBucket(t *testing.T) {
-	hc := prepareHandlerContext(t)
-	bktName := "bkt-name"
-
-	box, _ := createAccessBox(t)
-	createBucket(t, hc, bktName, box)
-	createBucketAssertS3Error(hc, bktName, box, s3errors.ErrBucketAlreadyOwnedByYou)
-
-	box2, _ := createAccessBox(t)
-	createBucketAssertS3Error(hc, bktName, box2, s3errors.ErrBucketAlreadyExists)
-}
--- a/api/handler/response.go
+++ b/api/handler/response.go
@ -104,7 +104,7 @@ type Object struct {
 	Key          string
 	LastModified string // time string of format "2006-01-02T15:04:05.000Z"
 	ETag         string `xml:"ETag,omitempty"`
-	Size         uint64
+	Size         int64

 	// Owner of the object.
 	Owner *Owner `xml:"Owner,omitempty"`
@ -120,7 +120,7 @@ type ObjectVersionResponse struct {
 	Key          string `xml:"Key"`
 	LastModified string `xml:"LastModified"`
 	Owner        Owner  `xml:"Owner"`
-	Size         uint64 `xml:"Size"`
+	Size         int64  `xml:"Size"`
 	StorageClass string `xml:"StorageClass,omitempty"` // is empty!!
 	VersionID    string `xml:"VersionId"`
 }
--- a/api/handler/s3reader.go
+++ b/api/handler/s3reader.go
@ -1,224 +0,0 @@
-package handler
-
-import (
-	"bufio"
-	"bytes"
-	"encoding/hex"
-	"errors"
-	"io"
-	"net/http"
-	"time"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
-	v4 "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth/signer/v4"
-	errs "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"github.com/aws/aws-sdk-go/aws/credentials"
-)
-
-const (
-	chunkSignatureHeader = "chunk-signature="
-	maxChunkSize         = 16 << 20
-)
-
-type (
-	s3ChunkReader struct {
-		reader       *bufio.Reader
-		streamSigner *v4.StreamSigner
-
-		requestTime time.Time
-		buffer      []byte
-		offset      int
-		err         error
-	}
-)
-
-var (
-	errGiantChunk               = errors.New("chunk too big: choose chunk size <= 16MiB")
-	errMalformedChunkedEncoding = errors.New("malformed chunked encoding")
-)
-
-func (c *s3ChunkReader) Close() (err error) {
-	return nil
-}
-
-func (c *s3ChunkReader) Read(buf []byte) (num int, err error) {
-	if c.offset > 0 {
-		num = copy(buf, c.buffer[c.offset:])
-		if num == len(buf) {
-			c.offset += num
-			return num, nil
-		}
-		c.offset = 0
-		buf = buf[num:]
-	}
-
-	var size int
-	for {
-		b, err := c.reader.ReadByte()
-		if err == io.EOF {
-			err = io.ErrUnexpectedEOF
-		}
-		if err != nil {
-			c.err = err
-			return num, c.err
-		}
-		if b == ';' { // separating character
-			break
-		}
-
-		// Manually deserialize the size since AWS specified
-		// the chunk size to be of variable width. In particular,
-		// a size of 16 is encoded as `10` while a size of 64 KB
-		// is `10000`.
-		switch {
-		case b >= '0' && b <= '9':
-			size = size<<4 | int(b-'0')
-		case b >= 'a' && b <= 'f':
-			size = size<<4 | int(b-('a'-10))
-		case b >= 'A' && b <= 'F':
-			size = size<<4 | int(b-('A'-10))
-		default:
-			c.err = errMalformedChunkedEncoding
-			return num, c.err
-		}
-		if size > maxChunkSize {
-			c.err = errGiantChunk
-			return num, c.err
-		}
-	}
-
-	// Now, we read the signature of the following payload and expect:
-	//   chunk-signature=" + <signature-as-hex> + "\r\n"
-	//
-	// The signature is 64 bytes long (hex-encoded SHA256 hash) and
-	// starts with a 16 byte header: len("chunk-signature=") + 64 == 80.
-	var signature [80]byte
-	_, err = io.ReadFull(c.reader, signature[:])
-	if err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	if err != nil {
-		c.err = err
-		return num, c.err
-	}
-	if !bytes.HasPrefix(signature[:], []byte(chunkSignatureHeader)) {
-		c.err = errMalformedChunkedEncoding
-		return num, c.err
-	}
-	b, err := c.reader.ReadByte()
-	if err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	if err != nil {
-		c.err = err
-		return num, c.err
-	}
-	if b != '\r' {
-		c.err = errMalformedChunkedEncoding
-		return num, c.err
-	}
-	b, err = c.reader.ReadByte()
-	if err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	if err != nil {
-		c.err = err
-		return num, c.err
-	}
-	if b != '\n' {
-		c.err = errMalformedChunkedEncoding
-		return num, c.err
-	}
-
-	if cap(c.buffer) < size {
-		c.buffer = make([]byte, size)
-	} else {
-		c.buffer = c.buffer[:size]
-	}
-
-	// Now, we read the payload and compute its SHA-256 hash.
-	_, err = io.ReadFull(c.reader, c.buffer)
-	if err == io.EOF && size != 0 {
-		err = io.ErrUnexpectedEOF
-	}
-	if err != nil && err != io.EOF {
-		c.err = err
-		return num, c.err
-	}
-	b, err = c.reader.ReadByte()
-	if b != '\r' || err != nil {
-		c.err = errMalformedChunkedEncoding
-		return num, c.err
-	}
-	b, err = c.reader.ReadByte()
-	if err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	if err != nil {
-		c.err = err
-		return num, c.err
-	}
-	if b != '\n' {
-		c.err = errMalformedChunkedEncoding
-		return num, c.err
-	}
-
-	// Once we have read the entire chunk successfully, we verify
-	// that the received signature matches our computed signature.
-
-	calculatedSignature, err := c.streamSigner.GetSignature(nil, c.buffer, c.requestTime)
-	if err != nil {
-		c.err = err
-		return num, c.err
-	}
-	if string(signature[16:]) != hex.EncodeToString(calculatedSignature) {
-		c.err = errs.GetAPIError(errs.ErrSignatureDoesNotMatch)
-		return num, c.err
-	}
-
-	// If the chunk size is zero we return io.EOF. As specified by AWS,
-	// only the last chunk is zero-sized.
-	if size == 0 {
-		c.err = io.EOF
-		return num, c.err
-	}
-
-	c.offset = copy(buf, c.buffer)
-	num += c.offset
-	return num, err
-}
-
-func newSignV4ChunkedReader(req *http.Request) (io.ReadCloser, error) {
-	// Expecting to refactor this in future:
-	// https://git.frostfs.info/TrueCloudLab/frostfs-s3-gw/issues/137
-	box, ok := req.Context().Value(middleware.BoxData).(*accessbox.Box)
-	if !ok {
-		return nil, errs.GetAPIError(errs.ErrAuthorizationHeaderMalformed)
-	}
-
-	authHeaders, ok := req.Context().Value(middleware.AuthHeaders).(*auth.AuthHeader)
-	if !ok {
-		return nil, errs.GetAPIError(errs.ErrAuthorizationHeaderMalformed)
-	}
-
-	currentCredentials := credentials.NewStaticCredentials(authHeaders.AccessKeyID, box.Gate.AccessKey, "")
-	seed, err := hex.DecodeString(authHeaders.SignatureV4)
-	if err != nil {
-		return nil, errs.GetAPIError(errs.ErrSignatureDoesNotMatch)
-	}
-
-	reqTime, ok := req.Context().Value(middleware.ClientTime).(time.Time)
-	if !ok {
-		return nil, errs.GetAPIError(errs.ErrMalformedDate)
-	}
-	newStreamSigner := v4.NewStreamSigner(authHeaders.Region, "s3", seed, currentCredentials)
-
-	return &s3ChunkReader{
-		reader:       bufio.NewReader(req.Body),
-		streamSigner: newStreamSigner,
-		requestTime:  reqTime,
-		buffer:       make([]byte, 64*1024),
-	}, nil
-}
--- a/api/handler/tagging.go
+++ b/api/handler/tagging.go
@ -8,11 +8,10 @@ import (
 	"strings"
 	"unicode"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"go.uber.org/zap"
 )

@ -25,8 +24,7 @@ const (
 )

 func (h *handler) PutObjectTaggingHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())

 	tagSet, err := readTagSet(r.Body)
 	if err != nil {
@ -48,7 +46,7 @@ func (h *handler) PutObjectTaggingHandler(w http.ResponseWriter, r *http.Request
 		},
 		TagSet: tagSet,
 	}
-	nodeVersion, err := h.obj.PutObjectTagging(ctx, tagPrm)
+	nodeVersion, err := h.obj.PutObjectTagging(r.Context(), tagPrm)
 	if err != nil {
 		h.logAndSendError(w, "could not put object tagging", reqInfo, err)
 		return
@ -65,15 +63,15 @@ func (h *handler) PutObjectTaggingHandler(w http.ResponseWriter, r *http.Request
 		BktInfo: bktInfo,
 		ReqInfo: reqInfo,
 	}
-	if err = h.sendNotifications(ctx, s); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), s); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

 	w.WriteHeader(http.StatusOK)
 }

 func (h *handler) GetObjectTaggingHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -104,14 +102,13 @@ func (h *handler) GetObjectTaggingHandler(w http.ResponseWriter, r *http.Request
 	if settings.VersioningEnabled() {
 		w.Header().Set(api.AmzVersionID, versionID)
 	}
-	if err = middleware.EncodeToResponse(w, encodeTagging(tagSet)); err != nil {
+	if err = api.EncodeToResponse(w, encodeTagging(tagSet)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }

 func (h *handler) DeleteObjectTaggingHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := r.Context()
-	reqInfo := middleware.GetReqInfo(ctx)
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -125,7 +122,7 @@ func (h *handler) DeleteObjectTaggingHandler(w http.ResponseWriter, r *http.Requ
 		VersionID:  reqInfo.URL.Query().Get(api.QueryVersionID),
 	}

-	nodeVersion, err := h.obj.DeleteObjectTagging(ctx, p)
+	nodeVersion, err := h.obj.DeleteObjectTagging(r.Context(), p)
 	if err != nil {
 		h.logAndSendError(w, "could not delete object tagging", reqInfo, err)
 		return
@ -142,15 +139,15 @@ func (h *handler) DeleteObjectTaggingHandler(w http.ResponseWriter, r *http.Requ
 		BktInfo: bktInfo,
 		ReqInfo: reqInfo,
 	}
-	if err = h.sendNotifications(ctx, s); err != nil {
-		h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err))
+	if err = h.sendNotifications(r.Context(), s); err != nil {
+		h.log.Error("couldn't send notification: %w", zap.Error(err))
 	}

 	w.WriteHeader(http.StatusNoContent)
 }

 func (h *handler) PutBucketTaggingHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	tagSet, err := readTagSet(r.Body)
 	if err != nil {
@ -171,7 +168,7 @@ func (h *handler) PutBucketTaggingHandler(w http.ResponseWriter, r *http.Request
 }

 func (h *handler) GetBucketTaggingHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -185,14 +182,14 @@ func (h *handler) GetBucketTaggingHandler(w http.ResponseWriter, r *http.Request
 		return
 	}

-	if err = middleware.EncodeToResponse(w, encodeTagging(tagSet)); err != nil {
+	if err = api.EncodeToResponse(w, encodeTagging(tagSet)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 		return
 	}
 }

 func (h *handler) DeleteBucketTaggingHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
--- a/api/handler/unimplemented.go
+++ b/api/handler/unimplemented.go
@ -3,58 +3,58 @@ package handler
 import (
 	"net/http"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 )

 func (h *handler) SelectObjectContentHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketLifecycleHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketEncryptionHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketWebsiteHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketAccelerateHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketRequestPaymentHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketLoggingHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) GetBucketReplicationHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) DeleteBucketWebsiteHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) ListenBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) ListObjectsV2MHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) PutBucketLifecycleHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }

 func (h *handler) PutBucketEncryptionHandler(w http.ResponseWriter, r *http.Request) {
-	h.logAndSendError(w, "not implemented", middleware.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
+	h.logAndSendError(w, "not implemented", api.GetReqInfo(r.Context()), errors.GetAPIError(errors.ErrNotImplemented))
 }
--- a/api/handler/util.go
+++ b/api/handler/util.go
@ -2,31 +2,21 @@ package handler

 import (
 	"context"
-	"errors"
+	errorsStd "errors"
 	"net/http"
 	"strconv"
 	"strings"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	frosterrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"go.uber.org/zap"
 )

-func (h *handler) reqLogger(ctx context.Context) *zap.Logger {
-	reqLogger := middleware.GetReqLog(ctx)
-	if reqLogger != nil {
-		return reqLogger
-	}
-	return h.log
-}
-
-func (h *handler) logAndSendError(w http.ResponseWriter, logText string, reqInfo *middleware.ReqInfo, err error, additional ...zap.Field) {
-	code := middleware.WriteErrorResponse(w, reqInfo, transformToS3Error(err))
+func (h *handler) logAndSendError(w http.ResponseWriter, logText string, reqInfo *api.ReqInfo, err error, additional ...zap.Field) {
+	code := api.WriteErrorResponse(w, reqInfo, transformToS3Error(err))
 	fields := []zap.Field{
 		zap.Int("status", code),
 		zap.String("request_id", reqInfo.RequestID),
@ -36,38 +26,20 @@ func (h *handler) logAndSendError(w http.ResponseWriter, logText string, reqInfo
 		zap.String("description", logText),
 		zap.Error(err)}
 	fields = append(fields, additional...)
-	h.log.Error("request failed", fields...) // consider using h.reqLogger (it requires accept context.Context or http.Request)
-}
-
-func (h *handler) logAndSendErrorNoHeader(w http.ResponseWriter, logText string, reqInfo *middleware.ReqInfo, err error, additional ...zap.Field) {
-	middleware.WriteErrorResponseNoHeader(w, reqInfo, transformToS3Error(err))
-	fields := []zap.Field{
-		zap.String("request_id", reqInfo.RequestID),
-		zap.String("method", reqInfo.API),
-		zap.String("bucket", reqInfo.BucketName),
-		zap.String("object", reqInfo.ObjectName),
-		zap.String("description", logText),
-		zap.Error(err)}
-	fields = append(fields, additional...)
-	h.log.Error("request failed", fields...) // consider using h.reqLogger (it requires accept context.Context or http.Request)
+	h.log.Error("call method", fields...)
 }

 func transformToS3Error(err error) error {
-	err = frosterrors.UnwrapErr(err) // this wouldn't work with errors.Join
-	if _, ok := err.(s3errors.Error); ok {
+	if _, ok := err.(errors.Error); ok {
 		return err
 	}

-	if errors.Is(err, layer.ErrAccessDenied) ||
-		errors.Is(err, layer.ErrNodeAccessDenied) {
-		return s3errors.GetAPIError(s3errors.ErrAccessDenied)
+	if errorsStd.Is(err, layer.ErrAccessDenied) ||
+		errorsStd.Is(err, layer.ErrNodeAccessDenied) {
+		return errors.GetAPIError(errors.ErrAccessDenied)
 	}

-	if errors.Is(err, layer.ErrGatewayTimeout) {
-		return s3errors.GetAPIError(s3errors.ErrGatewayTimeout)
-	}
-
-	return s3errors.GetAPIError(s3errors.ErrInternalError)
+	return errors.GetAPIError(errors.ErrInternalError)
 }

 func (h *handler) ResolveBucket(ctx context.Context, bucket string) (*data.BucketInfo, error) {
@ -102,26 +74,26 @@ func parseRange(s string) (*layer.RangeParams, error) {
 	prefix := "bytes="

 	if !strings.HasPrefix(s, prefix) {
-		return nil, s3errors.GetAPIError(s3errors.ErrInvalidRange)
+		return nil, errors.GetAPIError(errors.ErrInvalidRange)
 	}

 	s = strings.TrimPrefix(s, prefix)

 	valuesStr := strings.Split(s, "-")
 	if len(valuesStr) != 2 {
-		return nil, s3errors.GetAPIError(s3errors.ErrInvalidRange)
+		return nil, errors.GetAPIError(errors.ErrInvalidRange)
 	}

 	values := make([]uint64, 0, len(valuesStr))
 	for _, v := range valuesStr {
 		num, err := strconv.ParseUint(v, 10, 64)
 		if err != nil {
-			return nil, s3errors.GetAPIError(s3errors.ErrInvalidRange)
+			return nil, errors.GetAPIError(errors.ErrInvalidRange)
 		}
 		values = append(values, num)
 	}
 	if values[0] > values[1] {
-		return nil, s3errors.GetAPIError(s3errors.ErrInvalidRange)
+		return nil, errors.GetAPIError(errors.ErrInvalidRange)
 	}

 	return &layer.RangeParams{
@ -137,7 +109,7 @@ func getSessionTokenSetEACL(ctx context.Context) (*session.Container, error) {
 	}
 	sessionToken := boxData.Gate.SessionTokenForSetEACL()
 	if sessionToken == nil {
-		return nil, s3errors.GetAPIError(s3errors.ErrAccessDenied)
+		return nil, errors.GetAPIError(errors.ErrAccessDenied)
 	}

 	return sessionToken, nil
--- a/api/handler/util_test.go
+++ b/api/handler/util_test.go
@ -1,64 +0,0 @@
-package handler
-
-import (
-	"errors"
-	"fmt"
-	"testing"
-
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"github.com/stretchr/testify/require"
-)
-
-func TestTransformS3Errors(t *testing.T) {
-	for _, tc := range []struct {
-		name     string
-		err      error
-		expected s3errors.ErrorCode
-	}{
-		{
-			name:     "simple std error to internal error",
-			err:      errors.New("some error"),
-			expected: s3errors.ErrInternalError,
-		},
-		{
-			name:     "layer access denied error to s3 access denied error",
-			err:      layer.ErrAccessDenied,
-			expected: s3errors.ErrAccessDenied,
-		},
-		{
-			name:     "wrapped layer access denied error to s3 access denied error",
-			err:      fmt.Errorf("wrap: %w", layer.ErrAccessDenied),
-			expected: s3errors.ErrAccessDenied,
-		},
-		{
-			name:     "layer node access denied error to s3 access denied error",
-			err:      layer.ErrNodeAccessDenied,
-			expected: s3errors.ErrAccessDenied,
-		},
-		{
-			name:     "layer gateway timeout error to s3 gateway timeout error",
-			err:      layer.ErrGatewayTimeout,
-			expected: s3errors.ErrGatewayTimeout,
-		},
-		{
-			name:     "s3 error to s3 error",
-			err:      s3errors.GetAPIError(s3errors.ErrInvalidPart),
-			expected: s3errors.ErrInvalidPart,
-		},
-		{
-			name:     "wrapped s3 error to s3 error",
-			err:      fmt.Errorf("wrap: %w", s3errors.GetAPIError(s3errors.ErrInvalidPart)),
-			expected: s3errors.ErrInvalidPart,
-		},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			err := transformToS3Error(tc.err)
-			s3err, ok := err.(s3errors.Error)
-			require.True(t, ok, "error must be s3 error")
-			require.Equalf(t, tc.expected, s3err.ErrCode,
-				"expected: '%s', got: '%s'",
-				s3errors.GetAPIError(tc.expected).Code, s3errors.GetAPIError(s3err.ErrCode).Code)
-		})
-	}
-}
--- a/api/handler/versioning.go
+++ b/api/handler/versioning.go
@ -4,14 +4,14 @@ import (
 	"encoding/xml"
 	"net/http"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer"
 )

 func (h *handler) PutBucketVersioningHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	configuration := new(VersioningConfiguration)
 	if err := xml.NewDecoder(r.Body).Decode(configuration); err != nil {
@ -57,7 +57,7 @@ func (h *handler) PutBucketVersioningHandler(w http.ResponseWriter, r *http.Requ

 // GetBucketVersioningHandler implements bucket versioning getter handler.
 func (h *handler) GetBucketVersioningHandler(w http.ResponseWriter, r *http.Request) {
-	reqInfo := middleware.GetReqInfo(r.Context())
+	reqInfo := api.GetReqInfo(r.Context())

 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
@ -71,7 +71,7 @@ func (h *handler) GetBucketVersioningHandler(w http.ResponseWriter, r *http.Requ
 		return
 	}

-	if err = middleware.EncodeToResponse(w, formVersioningConfiguration(settings)); err != nil {
+	if err = api.EncodeToResponse(w, formVersioningConfiguration(settings)); err != nil {
 		h.logAndSendError(w, "something went wrong", reqInfo, err)
 	}
 }
--- a/api/headers.go
+++ b/api/headers.go
@ -1,7 +1,5 @@
 package api

-import "net/http"
-
 // Standard S3 HTTP request/response constants.
 const (
 	MetadataPrefix              = "X-Amz-Meta-"
@ -41,13 +39,11 @@ const (
 	IfMatch            = "If-Match"
 	IfNoneMatch        = "If-None-Match"

-	AmzContentSha256             = "X-Amz-Content-Sha256"
 	AmzCopyIfModifiedSince       = "X-Amz-Copy-Source-If-Modified-Since"
 	AmzCopyIfUnmodifiedSince     = "X-Amz-Copy-Source-If-Unmodified-Since"
 	AmzCopyIfMatch               = "X-Amz-Copy-Source-If-Match"
 	AmzCopyIfNoneMatch           = "X-Amz-Copy-Source-If-None-Match"
 	AmzACL                       = "X-Amz-Acl"
-	AmzDecodedContentLength      = "X-Amz-Decoded-Content-Length"
 	AmzGrantFullControl          = "X-Amz-Grant-Full-Control"
 	AmzGrantRead                 = "X-Amz-Grant-Read"
 	AmzGrantWrite                = "X-Amz-Grant-Write"
@ -66,7 +62,6 @@ const (
 	AmzServerSideEncryptionCustomerKey       = "x-amz-server-side-encryption-customer-key"
 	AmzServerSideEncryptionCustomerKeyMD5    = "x-amz-server-side-encryption-customer-key-MD5"

-	OwnerID       = "X-Owner-Id"
 	ContainerID   = "X-Container-Id"
 	ContainerName = "X-Container-Name"
 	ContainerZone = "X-Container-Zone"
@ -82,13 +77,9 @@ const (
 	AccessControlRequestMethod  = "Access-Control-Request-Method"
 	AccessControlRequestHeaders = "Access-Control-Request-Headers"

-	AwsChunked = "aws-chunked"
-
 	Vary = "Vary"

 	DefaultLocationConstraint = "default"
-
-	StreamingContentSHA256 = "STREAMING-AWS4-HMAC-SHA256-PAYLOAD"
 )

 // S3 request query params.
@ -115,8 +106,3 @@ var SystemMetadata = map[string]struct{}{
 	LastModified:       {},
 	ETag:               {},
 }
-
-func IsSignedStreamingV4(r *http.Request) bool {
-	return r.Header.Get(AmzContentSha256) == StreamingContentSHA256 &&
-		r.Method == http.MethodPut
-}
--- a/api/host_bucket_router.go
+++ b/api/host_bucket_router.go
@ -1,71 +0,0 @@
-package api
-
-import (
-	"net/http"
-	"strings"
-
-	"github.com/go-chi/chi/v5"
-)
-
-type HostBucketRouter struct {
-	routes        map[string]chi.Router
-	bktParam      string
-	defaultRouter chi.Router
-}
-
-func NewHostBucketRouter(bktParam string) HostBucketRouter {
-	return HostBucketRouter{
-		routes:   make(map[string]chi.Router),
-		bktParam: bktParam,
-	}
-}
-
-func (hr *HostBucketRouter) Default(router chi.Router) {
-	hr.defaultRouter = router
-}
-
-func (hr HostBucketRouter) Map(host string, h chi.Router) {
-	hr.routes[strings.ToLower(host)] = h
-}
-
-func (hr HostBucketRouter) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	bucket, domain := getBucketDomain(getHost(r))
-	router, ok := hr.routes[strings.ToLower(domain)]
-	if !ok {
-		router = hr.defaultRouter
-		if router == nil {
-			http.Error(w, http.StatusText(404), 404)
-			return
-		}
-	}
-
-	if rctx := chi.RouteContext(r.Context()); rctx != nil && bucket != "" {
-		rctx.URLParams.Add(hr.bktParam, bucket)
-	}
-
-	router.ServeHTTP(w, r)
-}
-
-func getBucketDomain(host string) (bucket string, domain string) {
-	parts := strings.Split(host, ".")
-	if len(parts) > 1 {
-		return parts[0], strings.Join(parts[1:], ".")
-	}
-	return "", host
-}
-
-// getHost tries its best to return the request host.
-// According to section 14.23 of RFC 2616 the Host header
-// can include the port number if the default value of 80 is not used.
-func getHost(r *http.Request) string {
-	host := r.Host
-	if r.URL.IsAbs() {
-		host = r.URL.Host
-	}
-
-	if i := strings.Index(host, ":"); i != -1 {
-		host = host[:i]
-	}
-
-	return host
-}
--- a/api/layer/cache.go
+++ b/api/layer/cache.go
@ -1,11 +1,11 @@
 package layer

 import (
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/cache"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/cache"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"go.uber.org/zap"
 )

--- a/api/layer/compound.go
+++ b/api/layer/compound.go
@ -2,11 +2,10 @@ package layer

 import (
 	"context"
-	"errors"
-	"fmt"
+	errorsStd "errors"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 )

 func (n *layer) GetObjectTaggingAndLock(ctx context.Context, objVersion *ObjectVersion, nodeVersion *data.NodeVersion) (map[string]string, *data.LockInfo, error) {
@ -29,8 +28,8 @@ func (n *layer) GetObjectTaggingAndLock(ctx context.Context, objVersion *ObjectV

 	tags, lockInfo, err = n.treeService.GetObjectTaggingAndLock(ctx, objVersion.BktInfo, nodeVersion)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return nil, nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
+		if errorsStd.Is(err, ErrNodeNotFound) {
+			return nil, nil, errors.GetAPIError(errors.ErrNoSuchKey)
 		}
 		return nil, nil, err
 	}
--- a/api/layer/container.go
+++ b/api/layer/container.go
@ -5,15 +5,15 @@ import (
 	"fmt"
 	"strconv"

-	v2container "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
+	v2container "github.com/TrueCloudLab/frostfs-api-go/v2/container"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-sdk-go/client"
+	"github.com/TrueCloudLab/frostfs-sdk-go/container"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
 	"go.uber.org/zap"
 )

@ -34,7 +34,8 @@ func (n *layer) containerInfo(ctx context.Context, idCnr cid.ID) (*data.BucketIn
 	var (
 		err error
 		res *container.Container
-		log = n.reqLogger(ctx).With(zap.Stringer("cid", idCnr))
+		rid = api.GetRequestID(ctx)
+		log = n.log.With(zap.Stringer("cid", idCnr), zap.String("request_id", rid))

 		info = &data.BucketInfo{
 			CID:  idCnr,
@ -43,8 +44,10 @@ func (n *layer) containerInfo(ctx context.Context, idCnr cid.ID) (*data.BucketIn
 	)
 	res, err = n.frostFS.Container(ctx, idCnr)
 	if err != nil {
+		log.Error("could not fetch container", zap.Error(err))
+
 		if client.IsErrContainerNotFound(err) {
-			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchBucket), err.Error())
+			return nil, errors.GetAPIError(errors.ErrNoSuchBucket)
 		}
 		return nil, fmt.Errorf("get frostfs container: %w", err)
 	}
@ -80,10 +83,13 @@ func (n *layer) containerList(ctx context.Context) ([]*data.BucketInfo, error) {
 		err error
 		own = n.Owner(ctx)
 		res []cid.ID
+		rid = api.GetRequestID(ctx)
 	)
 	res, err = n.frostFS.UserContainers(ctx, own)
 	if err != nil {
-		n.reqLogger(ctx).Error("could not list user containers", zap.Error(err))
+		n.log.Error("could not list user containers",
+			zap.String("request_id", rid),
+			zap.Error(err))
 		return nil, err
 	}

@ -91,7 +97,9 @@ func (n *layer) containerList(ctx context.Context) ([]*data.BucketInfo, error) {
 	for i := range res {
 		info, err := n.containerInfo(ctx, res[i])
 		if err != nil {
-			n.reqLogger(ctx).Error("could not fetch container info", zap.Error(err))
+			n.log.Error("could not fetch container info",
+				zap.String("request_id", rid),
+				zap.Error(err))
 			continue
 		}

--- a/api/layer/cors.go
+++ b/api/layer/cors.go
@ -8,8 +8,8 @@ import (
 	"fmt"
 	"io"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"go.uber.org/zap"
 )

@ -42,10 +42,10 @@ func (n *layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 		Payload:      &buf,
 		Filepath:     p.BktInfo.CORSObjectName(),
 		CreationTime: TimeNow(ctx),
-		CopiesNumber: p.CopiesNumbers,
+		CopiesNumber: p.CopiesNumber,
 	}

-	_, objID, _, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
+	objID, _, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
 	if err != nil {
 		return fmt.Errorf("put system object: %w", err)
 	}
@ -58,8 +58,9 @@ func (n *layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {

 	if !objIDToDeleteNotFound {
 		if err = n.objectDelete(ctx, p.BktInfo, objIDToDelete); err != nil {
-			n.reqLogger(ctx).Error("couldn't delete cors object", zap.Error(err),
+			n.log.Error("couldn't delete cors object", zap.Error(err),
 				zap.String("cnrID", p.BktInfo.CID.EncodeToString()),
+				zap.String("bucket name", p.BktInfo.Name),
 				zap.String("objID", objIDToDelete.EncodeToString()))
 		}
 	}
@ -73,7 +74,7 @@ func (n *layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*d
 	cors, err := n.getCORS(ctx, bktInfo)
 	if err != nil {
 		if errorsStd.Is(err, ErrNodeNotFound) {
-			return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
+			return nil, errors.GetAPIError(errors.ErrNoSuchCORSConfiguration)
 		}
 		return nil, err
 	}
--- a/api/layer/frostfs.go
+++ b/api/layer/frostfs.go
@ -7,16 +7,16 @@ import (
 	"io"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/acl"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/container"
+	"github.com/TrueCloudLab/frostfs-sdk-go/container/acl"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/netmap"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 )

 // PrmContainerCreate groups parameters of FrostFS.CreateContainer operation.
@ -113,7 +113,7 @@ type PrmObjectCreate struct {
 	Payload io.Reader

 	// Number of object copies that is enough to consider put successful.
-	CopiesNumber []uint32
+	CopiesNumber uint32
 }

 // PrmObjectDelete groups parameters of FrostFS.DeleteObject operation.
@ -128,29 +128,8 @@ type PrmObjectDelete struct {
 	Object oid.ID
 }

-// PrmObjectSearch groups parameters of FrostFS.sear SearchObjects operation.
-type PrmObjectSearch struct {
-	// Authentication parameters.
-	PrmAuth
-
-	// Container to select the objects from.
-	Container cid.ID
-
-	// Key-value object attribute which should be
-	// presented in selected objects. Optional, empty key means any.
-	ExactAttribute [2]string
-
-	// File prefix of the selected objects. Optional, empty value means any.
-	FilePrefix string
-}
-
-var (
 // ErrAccessDenied is returned from FrostFS in case of access violation.
-	ErrAccessDenied = errors.New("access denied")
-
-	// ErrGatewayTimeout is returned from FrostFS in case of timeout, deadline exceeded etc.
-	ErrGatewayTimeout = errors.New("gateway timeout")
-)
+var ErrAccessDenied = errors.New("access denied")

 // FrostFS represents virtual connection to FrostFS network.
 type FrostFS interface {
@ -231,15 +210,6 @@ type FrostFS interface {
 	// It returns any error encountered which prevented the removal request from being sent.
 	DeleteObject(context.Context, PrmObjectDelete) error

-	// SearchObjects performs object search from the NeoFS container according
-	// to the specified parameters. It searches user's objects only.
-	//
-	// It returns ErrAccessDenied on selection access violation.
-	//
-	// It returns exactly one non-nil value. It returns any error encountered which
-	// prevented the objects from being selected.
-	SearchObjects(context.Context, PrmObjectSearch) ([]oid.ID, error)
-
 	// TimeToEpoch computes current epoch and the epoch that corresponds to the provided now and future time.
 	// Note:
 	// * future time must be after the now
--- a/api/layer/layer.go
+++ b/api/layer/layer.go
@ -11,20 +11,18 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/netmap"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/nats-io/nats.go"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"go.uber.org/zap"
@ -74,7 +72,7 @@ type (
 		Range      *RangeParams
 		ObjectInfo *data.ObjectInfo
 		BucketInfo *data.BucketInfo
-		Versioned  bool
+		Writer     io.Writer
 		Encryption encryption.Params
 	}

@ -103,21 +101,12 @@ type (
 	PutObjectParams struct {
 		BktInfo      *data.BucketInfo
 		Object       string
-		Size          uint64
+		Size         int64
 		Reader       io.Reader
 		Header       map[string]string
 		Lock         *data.ObjectLock
 		Encryption   encryption.Params
-		CopiesNumbers []uint32
-	}
-
-	PutCombinedObjectParams struct {
-		BktInfo    *data.BucketInfo
-		Object     string
-		Size       uint64
-		Header     map[string]string
-		Lock       *data.ObjectLock
-		Encryption encryption.Params
+		CopiesNumber uint32
 	}

 	DeleteObjectParams struct {
@ -136,22 +125,21 @@ type (
 	PutCORSParams struct {
 		BktInfo      *data.BucketInfo
 		Reader       io.Reader
-		CopiesNumbers []uint32
+		CopiesNumber uint32
 	}

 	// CopyObjectParams stores object copy request parameters.
 	CopyObjectParams struct {
-		SrcVersioned  bool
 		SrcObject   *data.ObjectInfo
 		ScrBktInfo  *data.BucketInfo
 		DstBktInfo  *data.BucketInfo
 		DstObject   string
-		SrcSize       uint64
+		SrcSize     int64
 		Header      map[string]string
 		Range       *RangeParams
 		Lock        *data.ObjectLock
 		Encryption  encryption.Params
-		CopiesNumbers []uint32
+		CopiesNuber uint32
 	}
 	// CreateBucketParams stores bucket create request parameters.
 	CreateBucketParams struct {
@ -195,13 +183,6 @@ type (
 		Error             error
 	}

-	ObjectPayload struct {
-		r            io.Reader
-		params       getParams
-		encrypted    bool
-		decryptedLen uint64
-	}
-
 	// Client provides S3 API client interface.
 	Client interface {
 		Initialize(ctx context.Context, c EventListener) error
@ -221,7 +202,7 @@ type (
 		CreateBucket(ctx context.Context, p *CreateBucketParams) (*data.BucketInfo, error)
 		DeleteBucket(ctx context.Context, p *DeleteBucketParams) error

-		GetObject(ctx context.Context, p *GetObjectParams) (*ObjectPayload, error)
+		GetObject(ctx context.Context, p *GetObjectParams) error
 		GetObjectInfo(ctx context.Context, p *HeadObjectParams) (*data.ObjectInfo, error)
 		GetExtendedObjectInfo(ctx context.Context, p *HeadObjectParams) (*data.ExtendedObjectInfo, error)

@ -285,10 +266,6 @@ func (f MsgHandlerFunc) HandleMessage(ctx context.Context, msg *nats.Msg) error
 	return f(ctx, msg)
 }

-func (p HeadObjectParams) Versioned() bool {
-	return len(p.VersionID) > 0
-}
-
 // NewLayer creates an instance of a layer. It checks credentials
 // and establishes gRPC connection with the node.
 func NewLayer(log *zap.Logger, frostFS FrostFS, config *Config) Client {
@ -325,13 +302,13 @@ func (n *layer) IsNotificationEnabled() bool {

 // IsAuthenticatedRequest checks if access box exists in the current request.
 func IsAuthenticatedRequest(ctx context.Context) bool {
-	_, ok := ctx.Value(middleware.BoxData).(*accessbox.Box)
+	_, ok := ctx.Value(api.BoxData).(*accessbox.Box)
 	return ok
 }

 // TimeNow returns client time from request or time.Now().
 func TimeNow(ctx context.Context) time.Time {
-	if now, ok := ctx.Value(middleware.ClientTime).(time.Time); ok {
+	if now, ok := ctx.Value(api.ClientTime).(time.Time); ok {
 		return now
 	}

@ -340,7 +317,7 @@ func TimeNow(ctx context.Context) time.Time {

 // Owner returns owner id from BearerToken (context) or from client owner.
 func (n *layer) Owner(ctx context.Context) user.ID {
-	if bd, ok := ctx.Value(middleware.BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
+	if bd, ok := ctx.Value(api.BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
 		return bearer.ResolveIssuer(*bd.Gate.BearerToken)
 	}

@ -350,21 +327,11 @@ func (n *layer) Owner(ctx context.Context) user.ID {
 	return ownerID
 }

-func (n *layer) reqLogger(ctx context.Context) *zap.Logger {
-	reqLogger := middleware.GetReqLog(ctx)
-	if reqLogger != nil {
-		return reqLogger
-	}
-	return n.log
-}
-
 func (n *layer) prepareAuthParameters(ctx context.Context, prm *PrmAuth, bktOwner user.ID) {
-	if bd, ok := ctx.Value(middleware.BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
-		if bd.Gate.BearerToken.Impersonate() || bktOwner.Equals(bearer.ResolveIssuer(*bd.Gate.BearerToken)) {
+	if bd, ok := ctx.Value(api.BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
 		prm.BearerToken = bd.Gate.BearerToken
 		return
 	}
-	}

 	prm.PrivateKey = &n.anonKey.Key.PrivateKey
 }
@ -382,10 +349,8 @@ func (n *layer) GetBucketInfo(ctx context.Context, name string) (*data.BucketInf

 	containerID, err := n.ResolveBucket(ctx, name)
 	if err != nil {
-		if strings.Contains(err.Error(), "not found") {
-			return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchBucket), err.Error())
-		}
-		return nil, err
+		n.log.Debug("bucket not found", zap.Error(err))
+		return nil, errors.GetAPIError(errors.ErrNoSuchBucket)
 	}

 	return n.containerInfo(ctx, containerID)
@ -416,10 +381,10 @@ func (n *layer) ListBuckets(ctx context.Context) ([]*data.BucketInfo, error) {
 }

 // GetObject from storage.
-func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) (*ObjectPayload, error) {
+func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) error {
 	var params getParams

-	params.objInfo = p.ObjectInfo
+	params.oid = p.ObjectInfo.ID
 	params.bktInfo = p.BucketInfo

 	var decReader *encryption.Decrypter
@ -427,7 +392,7 @@ func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) (*ObjectPaylo
 		var err error
 		decReader, err = getDecrypter(p)
 		if err != nil {
-			return nil, fmt.Errorf("creating decrypter: %w", err)
+			return fmt.Errorf("creating decrypter: %w", err)
 		}
 		params.off = decReader.EncryptedOffset()
 		params.ln = decReader.EncryptedLength()
@ -441,58 +406,32 @@ func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) (*ObjectPaylo
 		}
 	}

-	r, err := n.initObjectPayloadReader(ctx, params)
+	payload, err := n.initObjectPayloadReader(ctx, params)
 	if err != nil {
-		if client.IsErrObjectNotFound(err) {
-			if p.Versioned {
-				err = fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchVersion), err.Error())
-			} else {
-				err = fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchKey), err.Error())
-			}
+		return fmt.Errorf("init object payload reader: %w", err)
 	}

-		return nil, fmt.Errorf("init object payload reader: %w", err)
-	}
-
-	var decryptedLen uint64
-	if decReader != nil {
-		if err = decReader.SetReader(r); err != nil {
-			return nil, fmt.Errorf("set reader to decrypter: %w", err)
-		}
-		r = io.LimitReader(decReader, int64(decReader.DecryptedLength()))
-		decryptedLen = decReader.DecryptedLength()
-	}
-
-	return &ObjectPayload{
-		r:            r,
-		params:       params,
-		encrypted:    decReader != nil,
-		decryptedLen: decryptedLen,
-	}, nil
-}
-
-// Read implements io.Reader. If you want to use ObjectPayload as io.Reader
-// you must not use ObjectPayload.StreamTo method and vice versa.
-func (o *ObjectPayload) Read(p []byte) (int, error) {
-	return o.r.Read(p)
-}
-
-// StreamTo reads all payload to provided writer.
-// If you want to use this method you must not use ObjectPayload.Read and vice versa.
-func (o *ObjectPayload) StreamTo(w io.Writer) error {
 	bufSize := uint64(32 * 1024) // configure?
-	if o.params.ln != 0 && o.params.ln < bufSize {
-		bufSize = o.params.ln
+	if params.ln != 0 && params.ln < bufSize {
+		bufSize = params.ln
 	}

 	// alloc buffer for copying
 	buf := make([]byte, bufSize) // sync-pool it?

+	r := payload
+	if decReader != nil {
+		if err = decReader.SetReader(payload); err != nil {
+			return fmt.Errorf("set reader to decrypter: %w", err)
+		}
+		r = io.LimitReader(decReader, int64(decReader.DecryptedLength()))
+	}
+
 	// copy full payload
-	written, err := io.CopyBuffer(w, o.r, buf)
+	written, err := io.CopyBuffer(p.Writer, r, buf)
 	if err != nil {
-		if o.encrypted {
-			return fmt.Errorf("copy object payload written: '%d', decLength: '%d', params.ln: '%d' : %w", written, o.decryptedLen, o.params.ln, err)
+		if decReader != nil {
+			return fmt.Errorf("copy object payload written: '%d', decLength: '%d', params.ln: '%d' : %w", written, decReader.DecryptedLength(), params.ln, err)
 		}
 		return fmt.Errorf("copy object payload written: '%d': %w", written, err)
 	}
@ -544,17 +483,21 @@ func (n *layer) GetExtendedObjectInfo(ctx context.Context, p *HeadObjectParams)
 	var objInfo *data.ExtendedObjectInfo
 	var err error

-	if p.Versioned() {
-		objInfo, err = n.headVersion(ctx, p.BktInfo, p)
-	} else {
+	if len(p.VersionID) == 0 {
 		objInfo, err = n.headLastVersionIfNotDeleted(ctx, p.BktInfo, p.Object)
+	} else {
+		objInfo, err = n.headVersion(ctx, p.BktInfo, p)
 	}
 	if err != nil {
 		return nil, err
 	}

-	n.reqLogger(ctx).Debug("get object",
+	reqInfo := api.GetReqInfo(ctx)
+	n.log.Debug("get object",
+		zap.String("reqId", reqInfo.RequestID),
+		zap.String("bucket", p.BktInfo.Name),
 		zap.Stringer("cid", p.BktInfo.CID),
+		zap.String("object", objInfo.ObjectInfo.Name),
 		zap.Stringer("oid", objInfo.ObjectInfo.ID))

 	return objInfo, nil
@ -562,25 +505,30 @@ func (n *layer) GetExtendedObjectInfo(ctx context.Context, p *HeadObjectParams)

 // CopyObject from one bucket into another bucket.
 func (n *layer) CopyObject(ctx context.Context, p *CopyObjectParams) (*data.ExtendedObjectInfo, error) {
-	objPayload, err := n.GetObject(ctx, &GetObjectParams{
+	pr, pw := io.Pipe()
+
+	go func() {
+		err := n.GetObject(ctx, &GetObjectParams{
 			ObjectInfo: p.SrcObject,
-		Versioned:  p.SrcVersioned,
+			Writer:     pw,
 			Range:      p.Range,
 			BucketInfo: p.ScrBktInfo,
 			Encryption: p.Encryption,
 		})
-	if err != nil {
-		return nil, fmt.Errorf("get object to copy: %w", err)
+
+		if err = pw.CloseWithError(err); err != nil {
+			n.log.Error("could not get object", zap.Error(err))
 		}
+	}()

 	return n.PutObject(ctx, &PutObjectParams{
 		BktInfo:      p.DstBktInfo,
 		Object:       p.DstObject,
 		Size:         p.SrcSize,
-		Reader:        objPayload,
+		Reader:       pr,
 		Header:       p.Header,
 		Encryption:   p.Encryption,
-		CopiesNumbers: p.CopiesNumbers,
+		CopiesNumber: p.CopiesNuber,
 	})
 }

@ -599,11 +547,11 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 	if len(obj.VersionID) != 0 || settings.Unversioned() {
 		var nodeVersion *data.NodeVersion
 		if nodeVersion, obj.Error = n.getNodeVersionToDelete(ctx, bkt, obj); obj.Error != nil {
-			return n.handleNotFoundError(bkt, obj)
+			return dismissNotFoundError(obj)
 		}

 		if obj.DeleteMarkVersion, obj.Error = n.removeOldVersion(ctx, bkt, nodeVersion, obj); obj.Error != nil {
-			return n.handleObjectDeleteErrors(ctx, bkt, obj, nodeVersion.ID)
+			return obj
 		}

 		obj.Error = n.treeService.RemoveVersion(ctx, bkt, nodeVersion.ID)
@ -611,37 +559,20 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 		return obj
 	}

-	lastVersion, err := n.getLastNodeVersion(ctx, bkt, obj)
-	if err != nil {
-		obj.Error = err
-		return n.handleNotFoundError(bkt, obj)
-	}
+	var newVersion *data.NodeVersion

 	if settings.VersioningSuspended() {
 		obj.VersionID = data.UnversionedObjectVersionID

-		var nullVersionToDelete *data.NodeVersion
-		if lastVersion.IsUnversioned {
-			if !lastVersion.IsDeleteMarker() {
-				nullVersionToDelete = lastVersion
-			}
-		} else if nullVersionToDelete, obj.Error = n.getNodeVersionToDelete(ctx, bkt, obj); obj.Error != nil {
-			if !isNotFoundError(obj.Error) {
-				return obj
-			}
+		var nodeVersion *data.NodeVersion
+		if nodeVersion, obj.Error = n.getNodeVersionToDelete(ctx, bkt, obj); obj.Error != nil {
+			return dismissNotFoundError(obj)
 		}

-		if nullVersionToDelete != nil {
-			if obj.DeleteMarkVersion, obj.Error = n.removeOldVersion(ctx, bkt, nullVersionToDelete, obj); obj.Error != nil {
-				return n.handleObjectDeleteErrors(ctx, bkt, obj, nullVersionToDelete.ID)
-			}
-		}
-	}
-
-	if lastVersion.IsDeleteMarker() {
-		obj.DeleteMarkVersion = lastVersion.OID.EncodeToString()
+		if obj.DeleteMarkVersion, obj.Error = n.removeOldVersion(ctx, bkt, nodeVersion, obj); obj.Error != nil {
 			return obj
 		}
+	}

 	randOID, err := getRandomOID()
 	if err != nil {
@ -651,7 +582,7 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings

 	obj.DeleteMarkVersion = randOID.EncodeToString()

-	newVersion := &data.NodeVersion{
+	newVersion = &data.NodeVersion{
 		BaseNodeVersion: data.BaseNodeVersion{
 			OID:      randOID,
 			FilePath: obj.Name,
@ -672,46 +603,15 @@ func (n *layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 	return obj
 }

-func (n *layer) handleNotFoundError(bkt *data.BucketInfo, obj *VersionedObject) *VersionedObject {
-	if isNotFoundError(obj.Error) {
+func dismissNotFoundError(obj *VersionedObject) *VersionedObject {
+	if errors.IsS3Error(obj.Error, errors.ErrNoSuchKey) ||
+		errors.IsS3Error(obj.Error, errors.ErrNoSuchVersion) {
 		obj.Error = nil
-		n.cache.CleanListCacheEntriesContainingObject(obj.Name, bkt.CID)
-		n.cache.DeleteObjectName(bkt.CID, bkt.Name, obj.Name)
 	}

 	return obj
 }

-func (n *layer) handleObjectDeleteErrors(ctx context.Context, bkt *data.BucketInfo, obj *VersionedObject, nodeID uint64) *VersionedObject {
-	if client.IsErrObjectAlreadyRemoved(obj.Error) {
-		n.reqLogger(ctx).Debug("object already removed",
-			zap.Stringer("cid", bkt.CID), zap.String("oid", obj.VersionID))
-
-		obj.Error = n.treeService.RemoveVersion(ctx, bkt, nodeID)
-		if obj.Error != nil {
-			return obj
-		}
-
-		n.cache.DeleteObjectName(bkt.CID, bkt.Name, obj.Name)
-	}
-
-	if client.IsErrObjectNotFound(obj.Error) {
-		n.reqLogger(ctx).Debug("object not found",
-			zap.Stringer("cid", bkt.CID), zap.String("oid", obj.VersionID))
-
-		obj.Error = nil
-
-		n.cache.DeleteObjectName(bkt.CID, bkt.Name, obj.Name)
-	}
-
-	return obj
-}
-
-func isNotFoundError(err error) bool {
-	return errors.IsS3Error(err, errors.ErrNoSuchKey) ||
-		errors.IsS3Error(err, errors.ErrNoSuchVersion)
-}
-
 func (n *layer) getNodeVersionToDelete(ctx context.Context, bkt *data.BucketInfo, obj *VersionedObject) (*data.NodeVersion, error) {
 	objVersion := &ObjectVersion{
 		BktInfo:               bkt,
@ -723,17 +623,6 @@ func (n *layer) getNodeVersionToDelete(ctx context.Context, bkt *data.BucketInfo
 	return n.getNodeVersion(ctx, objVersion)
 }

-func (n *layer) getLastNodeVersion(ctx context.Context, bkt *data.BucketInfo, obj *VersionedObject) (*data.NodeVersion, error) {
-	objVersion := &ObjectVersion{
-		BktInfo:               bkt,
-		ObjectName:            obj.Name,
-		VersionID:             "",
-		NoErrorOnDeleteMarker: true,
-	}
-
-	return n.getNodeVersion(ctx, objVersion)
-}
-
 func (n *layer) removeOldVersion(ctx context.Context, bkt *data.BucketInfo, nodeVersion *data.NodeVersion, obj *VersionedObject) (string, error) {
 	if nodeVersion.IsDeleteMarker() {
 		return obj.VersionID, nil
@ -774,14 +663,15 @@ func (n *layer) ResolveBucket(ctx context.Context, name string) (cid.ID, error)
 			return cid.ID{}, err
 		}

-		n.reqLogger(ctx).Info("resolve bucket", zap.Stringer("cid", cnrID))
+		reqInfo := api.GetReqInfo(ctx)
+		n.log.Info("resolve bucket", zap.String("reqId", reqInfo.RequestID), zap.String("bucket", name), zap.Stringer("cid", cnrID))
 	}

 	return cnrID, nil
 }

 func (n *layer) DeleteBucket(ctx context.Context, p *DeleteBucketParams) error {
-	nodeVersions, err := n.getAllObjectsVersions(ctx, p.BktInfo, "", "")
+	nodeVersions, err := n.bucketNodeVersions(ctx, p.BktInfo, "")
 	if err != nil {
 		return err
 	}
--- a/api/layer/locking_test.go
+++ b/api/layer/locking_test.go
@ -4,8 +4,7 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 	"github.com/stretchr/testify/require"
 )

@ -30,7 +29,7 @@ func TestObjectLockAttributes(t *testing.T) {
 				Until: time.Now(),
 			},
 		},
-		CopiesNumbers: []uint32{0},
+		CopiesNumber: 0,
 	}

 	err = tc.layer.PutLockInfo(tc.ctx, p)
@ -44,10 +43,10 @@ func TestObjectLockAttributes(t *testing.T) {

 	expEpoch := false
 	for _, attr := range lockObj.Attributes() {
-		if attr.Key() == object.SysAttributeExpEpoch {
+		if attr.Key() == AttributeExpirationEpoch {
 			expEpoch = true
 		}
 	}

-	require.Truef(t, expEpoch, "system header __SYSTEM__EXPIRATION_EPOCH presence")
+	require.Truef(t, expEpoch, "system header __NEOFS__EXPIRATION_EPOCH presence")
 }
--- a/api/layer/multi_object_reader.go
+++ b/api/layer/multi_object_reader.go
@ -1,149 +0,0 @@
-package layer
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"io"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-)
-
-type partObj struct {
-	OID  oid.ID
-	Size uint64
-}
-
-type readerInitiator interface {
-	initFrostFSObjectPayloadReader(ctx context.Context, p getFrostFSParams) (io.Reader, error)
-}
-
-// implements io.Reader of payloads of the object list stored in the FrostFS network.
-type multiObjectReader struct {
-	ctx context.Context
-
-	layer readerInitiator
-
-	startPartOffset uint64
-	endPartLength   uint64
-
-	prm getFrostFSParams
-
-	curIndex  int
-	curReader io.Reader
-
-	parts []partObj
-}
-
-type multiObjectReaderConfig struct {
-	layer readerInitiator
-
-	// the offset of complete object and total size to read
-	off, ln uint64
-
-	bktInfo *data.BucketInfo
-	parts   []partObj
-}
-
-var (
-	errOffsetIsOutOfRange = errors.New("offset is out of payload range")
-	errLengthIsOutOfRange = errors.New("length is out of payload range")
-	errEmptyPartsList     = errors.New("empty parts list")
-	errorZeroRangeLength  = errors.New("zero range length")
-)
-
-func newMultiObjectReader(ctx context.Context, cfg multiObjectReaderConfig) (*multiObjectReader, error) {
-	if len(cfg.parts) == 0 {
-		return nil, errEmptyPartsList
-	}
-
-	r := &multiObjectReader{
-		ctx:   ctx,
-		layer: cfg.layer,
-		prm: getFrostFSParams{
-			bktInfo: cfg.bktInfo,
-		},
-		parts: cfg.parts,
-	}
-
-	if cfg.off+cfg.ln == 0 {
-		return r, nil
-	}
-
-	if cfg.off > 0 && cfg.ln == 0 {
-		return nil, errorZeroRangeLength
-	}
-
-	startPartIndex, startPartOffset := findStartPart(cfg)
-	if startPartIndex == -1 {
-		return nil, errOffsetIsOutOfRange
-	}
-	r.startPartOffset = startPartOffset
-
-	endPartIndex, endPartLength := findEndPart(cfg)
-	if endPartIndex == -1 {
-		return nil, errLengthIsOutOfRange
-	}
-	r.endPartLength = endPartLength
-
-	r.parts = cfg.parts[startPartIndex : endPartIndex+1]
-
-	return r, nil
-}
-
-func findStartPart(cfg multiObjectReaderConfig) (index int, offset uint64) {
-	return findPartByPosition(cfg.off, cfg.parts)
-}
-
-func findEndPart(cfg multiObjectReaderConfig) (index int, length uint64) {
-	return findPartByPosition(cfg.off+cfg.ln, cfg.parts)
-}
-
-func findPartByPosition(position uint64, parts []partObj) (index int, positionInPart uint64) {
-	for i, part := range parts {
-		if position <= part.Size {
-			return i, position
-		}
-		position -= part.Size
-	}
-
-	return -1, 0
-}
-
-func (x *multiObjectReader) Read(p []byte) (n int, err error) {
-	if x.curReader != nil {
-		n, err = x.curReader.Read(p)
-		if !errors.Is(err, io.EOF) {
-			return n, err
-		}
-		x.curIndex++
-	}
-
-	if x.curIndex == len(x.parts) {
-		return n, io.EOF
-	}
-
-	x.prm.oid = x.parts[x.curIndex].OID
-
-	if x.curIndex == 0 {
-		x.prm.off = x.startPartOffset
-		x.prm.ln = x.parts[x.curIndex].Size - x.startPartOffset
-	}
-
-	if x.curIndex == len(x.parts)-1 {
-		x.prm.ln = x.endPartLength - x.prm.off
-	}
-
-	x.curReader, err = x.layer.initFrostFSObjectPayloadReader(x.ctx, x.prm)
-	if err != nil {
-		return n, fmt.Errorf("init payload reader for the next part: %w", err)
-	}
-
-	x.prm.off = 0
-	x.prm.ln = 0
-
-	next, err := x.Read(p[n:])
-
-	return n + next, err
-}
--- a/api/layer/multi_object_reader_test.go
+++ b/api/layer/multi_object_reader_test.go
@ -1,127 +0,0 @@
-package layer
-
-import (
-	"bytes"
-	"context"
-	"errors"
-	"fmt"
-	"io"
-	"testing"
-
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
-	"github.com/stretchr/testify/require"
-)
-
-type readerInitiatorMock struct {
-	parts map[oid.ID][]byte
-}
-
-func (r *readerInitiatorMock) initFrostFSObjectPayloadReader(_ context.Context, p getFrostFSParams) (io.Reader, error) {
-	partPayload, ok := r.parts[p.oid]
-	if !ok {
-		return nil, errors.New("part not found")
-	}
-
-	if p.off+p.ln == 0 {
-		return bytes.NewReader(partPayload), nil
-	}
-
-	if p.off > uint64(len(partPayload)-1) {
-		return nil, fmt.Errorf("invalid offset: %d/%d", p.off, len(partPayload))
-	}
-
-	if p.off+p.ln > uint64(len(partPayload)) {
-		return nil, fmt.Errorf("invalid range: %d-%d/%d", p.off, p.off+p.ln, len(partPayload))
-	}
-
-	return bytes.NewReader(partPayload[p.off : p.off+p.ln]), nil
-}
-
-func prepareDataReader() ([]byte, []partObj, *readerInitiatorMock) {
-	mockInitReader := &readerInitiatorMock{
-		parts: map[oid.ID][]byte{
-			oidtest.ID(): []byte("first part 1"),
-			oidtest.ID(): []byte("second part 2"),
-			oidtest.ID(): []byte("third part 3"),
-		},
-	}
-
-	var fullPayload []byte
-	parts := make([]partObj, 0, len(mockInitReader.parts))
-	for id, payload := range mockInitReader.parts {
-		parts = append(parts, partObj{OID: id, Size: uint64(len(payload))})
-		fullPayload = append(fullPayload, payload...)
-	}
-
-	return fullPayload, parts, mockInitReader
-}
-
-func TestMultiReader(t *testing.T) {
-	ctx := context.Background()
-
-	fullPayload, parts, mockInitReader := prepareDataReader()
-
-	for _, tc := range []struct {
-		name string
-		off  uint64
-		ln   uint64
-		err  error
-	}{
-		{
-			name: "simple read all",
-		},
-		{
-			name: "simple read with length",
-			ln:   uint64(len(fullPayload)),
-		},
-		{
-			name: "middle of parts",
-			off:  parts[0].Size + 2,
-			ln:   4,
-		},
-		{
-			name: "first and second",
-			off:  parts[0].Size - 4,
-			ln:   8,
-		},
-		{
-			name: "first and third",
-			off:  parts[0].Size - 4,
-			ln:   parts[1].Size + 8,
-		},
-		{
-			name: "offset out of range",
-			off:  uint64(len(fullPayload) + 1),
-			ln:   1,
-			err:  errOffsetIsOutOfRange,
-		},
-		{
-			name: "zero length",
-			off:  parts[1].Size + 1,
-			ln:   0,
-			err:  errorZeroRangeLength,
-		},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			multiReader, err := newMultiObjectReader(ctx, multiObjectReaderConfig{
-				layer: mockInitReader,
-				parts: parts,
-				off:   tc.off,
-				ln:    tc.ln,
-			})
-			require.ErrorIs(t, err, tc.err)
-
-			if tc.err == nil {
-				off := tc.off
-				ln := tc.ln
-				if off+ln == 0 {
-					ln = uint64(len(fullPayload))
-				}
-				data, err := io.ReadAll(multiReader)
-				require.NoError(t, err)
-				require.Equal(t, fullPayload[off:off+ln], data)
-			}
-		})
-	}
-}
--- a/api/layer/multipart_upload.go
+++ b/api/layer/multipart_upload.go
@ -1,11 +1,9 @@
 package layer

 import (
-	"bytes"
 	"context"
 	"encoding/hex"
-	"encoding/json"
-	"errors"
+	stderrors "errors"
 	"fmt"
 	"io"
 	"sort"
@ -13,11 +11,12 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/minio/sio"
 	"go.uber.org/zap"
 )
@ -27,10 +26,6 @@ const (
 	UploadPartNumberAttributeName = "S3-Upload-Part-Number"
 	UploadCompletedParts          = "S3-Completed-Parts"

-	// MultipartObjectSize contains the real object size if object is combined (payload contains list of parts).
-	// This header is used to determine if object is combined.
-	MultipartObjectSize = "S3-Multipart-Object-Size"
-
 	metaPrefix = "meta-"
 	aclPrefix  = "acl-"

@ -38,8 +33,8 @@ const (
 	MaxSizePartsList    = 1000
 	UploadMinPartNumber = 1
 	UploadMaxPartNumber = 10000
-	UploadMinSize       = 5 * 1024 * 1024      // 5MB
-	UploadMaxSize       = 1024 * UploadMinSize // 5GB
+	uploadMinSize       = 5 * 1048576    // 5MB
+	uploadMaxSize       = 5 * 1073741824 // 5GB
 )

 type (
@ -54,7 +49,7 @@ type (
 		Info         *UploadInfoParams
 		Header       map[string]string
 		Data         *UploadData
-		CopiesNumbers []uint32
+		CopiesNumber uint32
 	}

 	UploadData struct {
@ -65,12 +60,11 @@ type (
 	UploadPartParams struct {
 		Info       *UploadInfoParams
 		PartNumber int
-		Size       uint64
+		Size       int64
 		Reader     io.Reader
 	}

 	UploadCopyParams struct {
-		Versioned  bool
 		Info       *UploadInfoParams
 		SrcObjInfo *data.ObjectInfo
 		SrcBktInfo *data.BucketInfo
@ -97,7 +91,7 @@ type (
 		ETag         string
 		LastModified string
 		PartNumber   int
-		Size         uint64
+		Size         int64
 	}

 	ListMultipartUploadsParams struct {
@ -152,7 +146,7 @@ func (n *layer) CreateMultipartUpload(ctx context.Context, p *CreateMultipartPar
 		Owner:        n.Owner(ctx),
 		Created:      TimeNow(ctx),
 		Meta:         make(map[string]string, metaSize),
-		CopiesNumbers: p.CopiesNumbers,
+		CopiesNumber: p.CopiesNumber,
 	}

 	for key, val := range p.Header {
@ -181,14 +175,14 @@ func (n *layer) CreateMultipartUpload(ctx context.Context, p *CreateMultipartPar
 func (n *layer) UploadPart(ctx context.Context, p *UploadPartParams) (string, error) {
 	multipartInfo, err := n.treeService.GetMultipartUpload(ctx, p.Info.Bkt, p.Info.Key, p.Info.UploadID)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return "", fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchUpload), err.Error())
+		if stderrors.Is(err, ErrNodeNotFound) {
+			return "", errors.GetAPIError(errors.ErrNoSuchUpload)
 		}
 		return "", err
 	}

-	if p.Size > UploadMaxSize {
-		return "", fmt.Errorf("%w: %d/%d", s3errors.GetAPIError(s3errors.ErrEntityTooLarge), p.Size, UploadMaxSize)
+	if p.Size > uploadMaxSize {
+		return "", errors.GetAPIError(errors.ErrEntityTooLarge)
 	}

 	objInfo, err := n.uploadPart(ctx, multipartInfo, p)
@ -202,8 +196,8 @@ func (n *layer) UploadPart(ctx context.Context, p *UploadPartParams) (string, er
 func (n *layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInfo, p *UploadPartParams) (*data.ObjectInfo, error) {
 	encInfo := FormEncryptionInfo(multipartInfo.Meta)
 	if err := p.Info.Encryption.MatchObjectEncryption(encInfo); err != nil {
-		n.reqLogger(ctx).Warn("mismatched obj encryptionInfo", zap.Error(err))
-		return nil, s3errors.GetAPIError(s3errors.ErrInvalidEncryptionParameters)
+		n.log.Warn("mismatched obj encryptionInfo", zap.Error(err))
+		return nil, errors.GetAPIError(errors.ErrInvalidEncryptionParameters)
 	}

 	bktInfo := p.Info.Bkt
@ -213,55 +207,56 @@ func (n *layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 		Attributes:   make([][2]string, 2),
 		Payload:      p.Reader,
 		CreationTime: TimeNow(ctx),
-		CopiesNumber: multipartInfo.CopiesNumbers,
+		CopiesNumber: multipartInfo.CopiesNumber,
 	}

 	decSize := p.Size
 	if p.Info.Encryption.Enabled() {
-		r, encSize, err := encryptionReader(p.Reader, p.Size, p.Info.Encryption.Key())
+		r, encSize, err := encryptionReader(p.Reader, uint64(p.Size), p.Info.Encryption.Key())
 		if err != nil {
 			return nil, fmt.Errorf("failed to create ecnrypted reader: %w", err)
 		}
-		prm.Attributes = append(prm.Attributes, [2]string{AttributeDecryptedSize, strconv.FormatUint(p.Size, 10)})
+		prm.Attributes = append(prm.Attributes, [2]string{AttributeDecryptedSize, strconv.FormatInt(p.Size, 10)})
 		prm.Payload = r
-		p.Size = encSize
+		p.Size = int64(encSize)
 	}

 	prm.Attributes[0][0], prm.Attributes[0][1] = UploadIDAttributeName, p.Info.UploadID
 	prm.Attributes[1][0], prm.Attributes[1][1] = UploadPartNumberAttributeName, strconv.Itoa(p.PartNumber)

-	size, id, hash, err := n.objectPutAndHash(ctx, prm, bktInfo)
+	id, hash, err := n.objectPutAndHash(ctx, prm, bktInfo)
 	if err != nil {
 		return nil, err
 	}
-	if p.Info.Encryption.Enabled() {
-		size = decSize
-	}

-	n.reqLogger(ctx).Debug("upload part",
-		zap.String("multipart upload", p.Info.UploadID), zap.Int("part number", p.PartNumber),
-		zap.Stringer("cid", bktInfo.CID), zap.Stringer("oid", id))
+	reqInfo := api.GetReqInfo(ctx)
+	n.log.Debug("upload part",
+		zap.String("reqId", reqInfo.RequestID),
+		zap.String("bucket", bktInfo.Name), zap.Stringer("cid", bktInfo.CID),
+		zap.String("multipart upload", p.Info.UploadID),
+		zap.Int("part number", p.PartNumber), zap.String("object", p.Info.Key), zap.Stringer("oid", id))

 	partInfo := &data.PartInfo{
 		Key:      p.Info.Key,
 		UploadID: p.Info.UploadID,
 		Number:   p.PartNumber,
 		OID:      id,
-		Size:     size,
+		Size:     decSize,
 		ETag:     hex.EncodeToString(hash),
 		Created:  prm.CreationTime,
 	}

 	oldPartID, err := n.treeService.AddPart(ctx, bktInfo, multipartInfo.ID, partInfo)
-	oldPartIDNotFound := errors.Is(err, ErrNoNodeToRemove)
+	oldPartIDNotFound := stderrors.Is(err, ErrNoNodeToRemove)
 	if err != nil && !oldPartIDNotFound {
 		return nil, err
 	}
 	if !oldPartIDNotFound {
 		if err = n.objectDelete(ctx, bktInfo, oldPartID); err != nil {
-			n.reqLogger(ctx).Error("couldn't delete old part object", zap.Error(err),
-				zap.String("cid", bktInfo.CID.EncodeToString()),
-				zap.String("oid", oldPartID.EncodeToString()))
+			n.log.Error("couldn't delete old part object", zap.Error(err),
+				zap.String("cnrID", bktInfo.CID.EncodeToString()),
+				zap.String("bucket name", bktInfo.Name),
+				zap.String("objID", oldPartID.EncodeToString()))
 		}
 	}

@ -282,47 +277,91 @@ func (n *layer) uploadPart(ctx context.Context, multipartInfo *data.MultipartInf
 func (n *layer) UploadPartCopy(ctx context.Context, p *UploadCopyParams) (*data.ObjectInfo, error) {
 	multipartInfo, err := n.treeService.GetMultipartUpload(ctx, p.Info.Bkt, p.Info.Key, p.Info.UploadID)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchUpload), err.Error())
+		if stderrors.Is(err, ErrNodeNotFound) {
+			return nil, errors.GetAPIError(errors.ErrNoSuchUpload)
 		}
 		return nil, err
 	}

 	size := p.SrcObjInfo.Size
 	if p.Range != nil {
-		size = p.Range.End - p.Range.Start + 1
-		if p.Range.End > p.SrcObjInfo.Size {
-			return nil, fmt.Errorf("%w: %d-%d/%d", s3errors.GetAPIError(s3errors.ErrInvalidCopyPartRangeSource), p.Range.Start, p.Range.End, p.SrcObjInfo.Size)
+		size = int64(p.Range.End - p.Range.Start + 1)
+		if p.Range.End > uint64(p.SrcObjInfo.Size) {
+			return nil, errors.GetAPIError(errors.ErrInvalidCopyPartRangeSource)
 		}
 	}
-	if size > UploadMaxSize {
-		return nil, fmt.Errorf("%w: %d/%d", s3errors.GetAPIError(s3errors.ErrEntityTooLarge), size, UploadMaxSize)
+	if size > uploadMaxSize {
+		return nil, errors.GetAPIError(errors.ErrEntityTooLarge)
 	}

-	objPayload, err := n.GetObject(ctx, &GetObjectParams{
+	pr, pw := io.Pipe()
+
+	go func() {
+		err = n.GetObject(ctx, &GetObjectParams{
 			ObjectInfo: p.SrcObjInfo,
-		Versioned:  p.Versioned,
+			Writer:     pw,
 			Range:      p.Range,
 			BucketInfo: p.SrcBktInfo,
 		})
-	if err != nil {
-		return nil, fmt.Errorf("get object to upload copy: %w", err)
+
+		if err = pw.CloseWithError(err); err != nil {
+			n.log.Error("could not get object", zap.Error(err))
 		}
+	}()

 	params := &UploadPartParams{
 		Info:       p.Info,
 		PartNumber: p.PartNumber,
 		Size:       size,
-		Reader:     objPayload,
+		Reader:     pr,
 	}

 	return n.uploadPart(ctx, multipartInfo, params)
 }

+// implements io.Reader of payloads of the object list stored in the FrostFS network.
+type multiObjectReader struct {
+	ctx context.Context
+
+	layer *layer
+
+	prm getParams
+
+	curReader io.Reader
+
+	parts []*data.PartInfo
+}
+
+func (x *multiObjectReader) Read(p []byte) (n int, err error) {
+	if x.curReader != nil {
+		n, err = x.curReader.Read(p)
+		if !stderrors.Is(err, io.EOF) {
+			return n, err
+		}
+	}
+
+	if len(x.parts) == 0 {
+		return n, io.EOF
+	}
+
+	x.prm.oid = x.parts[0].OID
+
+	x.curReader, err = x.layer.initObjectPayloadReader(x.ctx, x.prm)
+	if err != nil {
+		return n, fmt.Errorf("init payload reader for the next part: %w", err)
+	}
+
+	x.parts = x.parts[1:]
+
+	next, err := x.Read(p[n:])
+
+	return n + next, err
+}
+
 func (n *layer) CompleteMultipartUpload(ctx context.Context, p *CompleteMultipartParams) (*UploadData, *data.ExtendedObjectInfo, error) {
 	for i := 1; i < len(p.Parts); i++ {
 		if p.Parts[i].PartNumber <= p.Parts[i-1].PartNumber {
-			return nil, nil, s3errors.GetAPIError(s3errors.ErrInvalidPartOrder)
+			return nil, nil, errors.GetAPIError(errors.ErrInvalidPartOrder)
 		}
 	}

@ -333,10 +372,10 @@ func (n *layer) CompleteMultipartUpload(ctx context.Context, p *CompleteMultipar
 	encInfo := FormEncryptionInfo(multipartInfo.Meta)

 	if len(partsInfo) < len(p.Parts) {
-		return nil, nil, fmt.Errorf("%w: found %d parts, need %d", s3errors.GetAPIError(s3errors.ErrInvalidPart), len(partsInfo), len(p.Parts))
+		return nil, nil, errors.GetAPIError(errors.ErrInvalidPart)
 	}

-	var multipartObjetSize uint64
+	var multipartObjetSize int64
 	var encMultipartObjectSize uint64
 	parts := make([]*data.PartInfo, 0, len(p.Parts))

@ -344,19 +383,17 @@ func (n *layer) CompleteMultipartUpload(ctx context.Context, p *CompleteMultipar
 	for i, part := range p.Parts {
 		partInfo := partsInfo[part.PartNumber]
 		if partInfo == nil || part.ETag != partInfo.ETag {
-			return nil, nil, fmt.Errorf("%w: unknown part %d or etag mismatched", s3errors.GetAPIError(s3errors.ErrInvalidPart), part.PartNumber)
+			return nil, nil, errors.GetAPIError(errors.ErrInvalidPart)
 		}
-		delete(partsInfo, part.PartNumber)
-
 		// for the last part we have no minimum size limit
-		if i != len(p.Parts)-1 && partInfo.Size < UploadMinSize {
-			return nil, nil, fmt.Errorf("%w: %d/%d", s3errors.GetAPIError(s3errors.ErrEntityTooSmall), partInfo.Size, UploadMinSize)
+		if i != len(p.Parts)-1 && partInfo.Size < uploadMinSize {
+			return nil, nil, errors.GetAPIError(errors.ErrEntityTooSmall)
 		}
 		parts = append(parts, partInfo)
 		multipartObjetSize += partInfo.Size // even if encryption is enabled size is actual (decrypted)

 		if encInfo.Enabled {
-			encPartSize, err := sio.EncryptedSize(partInfo.Size)
+			encPartSize, err := sio.EncryptedSize(uint64(partInfo.Size))
 			if err != nil {
 				return nil, nil, fmt.Errorf("compute encrypted size: %w", err)
 			}
@ -374,7 +411,6 @@ func (n *layer) CompleteMultipartUpload(ctx context.Context, p *CompleteMultipar

 	initMetadata := make(map[string]string, len(multipartInfo.Meta)+1)
 	initMetadata[UploadCompletedParts] = completedPartsHeader.String()
-	initMetadata[MultipartObjectSize] = strconv.FormatUint(multipartObjetSize, 10)

 	uploadData := &UploadData{
 		TagSet:     make(map[string]string),
@ -394,39 +430,43 @@ func (n *layer) CompleteMultipartUpload(ctx context.Context, p *CompleteMultipar
 		initMetadata[AttributeEncryptionAlgorithm] = encInfo.Algorithm
 		initMetadata[AttributeHMACKey] = encInfo.HMACKey
 		initMetadata[AttributeHMACSalt] = encInfo.HMACSalt
-		initMetadata[AttributeDecryptedSize] = strconv.FormatUint(multipartObjetSize, 10)
-		multipartObjetSize = encMultipartObjectSize
+		initMetadata[AttributeDecryptedSize] = strconv.FormatInt(multipartObjetSize, 10)
+		multipartObjetSize = int64(encMultipartObjectSize)
 	}

-	partsData, err := json.Marshal(parts)
-	if err != nil {
-		return nil, nil, fmt.Errorf("marshal parst for combined object: %w", err)
+	r := &multiObjectReader{
+		ctx:   ctx,
+		layer: n,
+		parts: parts,
 	}

+	r.prm.bktInfo = p.Info.Bkt
+
 	extObjInfo, err := n.PutObject(ctx, &PutObjectParams{
 		BktInfo:      p.Info.Bkt,
 		Object:       p.Info.Key,
-		Reader:        bytes.NewReader(partsData),
+		Reader:       r,
 		Header:       initMetadata,
 		Size:         multipartObjetSize,
 		Encryption:   p.Info.Encryption,
-		CopiesNumbers: multipartInfo.CopiesNumbers,
+		CopiesNumber: multipartInfo.CopiesNumber,
 	})
 	if err != nil {
-		n.reqLogger(ctx).Error("could not put a completed object (multipart upload)",
+		n.log.Error("could not put a completed object (multipart upload)",
 			zap.String("uploadID", p.Info.UploadID),
 			zap.String("uploadKey", p.Info.Key),
 			zap.Error(err))

-		return nil, nil, s3errors.GetAPIError(s3errors.ErrInternalError)
+		return nil, nil, errors.GetAPIError(errors.ErrInternalError)
 	}

 	var addr oid.Address
 	addr.SetContainer(p.Info.Bkt.CID)
 	for _, partInfo := range partsInfo {
 		if err = n.objectDelete(ctx, p.Info.Bkt, partInfo.OID); err != nil {
-			n.reqLogger(ctx).Warn("could not delete upload part",
-				zap.Stringer("cid", p.Info.Bkt.CID), zap.Stringer("oid", &partInfo.OID),
+			n.log.Warn("could not delete upload part",
+				zap.Stringer("object id", &partInfo.OID),
+				zap.Stringer("bucket id", p.Info.Bkt.CID),
 				zap.Error(err))
 		}
 		addr.SetObject(partInfo.OID)
@ -504,7 +544,7 @@ func (n *layer) AbortMultipartUpload(ctx context.Context, p *UploadInfoParams) e

 	for _, info := range parts {
 		if err = n.objectDelete(ctx, p.Bkt, info.OID); err != nil {
-			n.reqLogger(ctx).Warn("couldn't delete part", zap.String("cid", p.Bkt.CID.EncodeToString()),
+			n.log.Warn("couldn't delete part", zap.String("cid", p.Bkt.CID.EncodeToString()),
 				zap.String("oid", info.OID.EncodeToString()), zap.Int("part number", info.Number), zap.Error(err))
 		}
 	}
@ -521,8 +561,8 @@ func (n *layer) ListParts(ctx context.Context, p *ListPartsParams) (*ListPartsIn

 	encInfo := FormEncryptionInfo(multipartInfo.Meta)
 	if err = p.Info.Encryption.MatchObjectEncryption(encInfo); err != nil {
-		n.reqLogger(ctx).Warn("mismatched obj encryptionInfo", zap.Error(err))
-		return nil, s3errors.GetAPIError(s3errors.ErrInvalidEncryptionParameters)
+		n.log.Warn("mismatched obj encryptionInfo", zap.Error(err))
+		return nil, errors.GetAPIError(errors.ErrInvalidEncryptionParameters)
 	}

 	res.Owner = multipartInfo.Owner
@ -565,8 +605,8 @@ func (n *layer) ListParts(ctx context.Context, p *ListPartsParams) (*ListPartsIn
 func (n *layer) getUploadParts(ctx context.Context, p *UploadInfoParams) (*data.MultipartInfo, map[int]*data.PartInfo, error) {
 	multipartInfo, err := n.treeService.GetMultipartUpload(ctx, p.Bkt, p.Key, p.UploadID)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return nil, nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchUpload), err.Error())
+		if stderrors.Is(err, ErrNodeNotFound) {
+			return nil, nil, errors.GetAPIError(errors.ErrNoSuchUpload)
 		}
 		return nil, nil, err
 	}
@ -585,8 +625,12 @@ func (n *layer) getUploadParts(ctx context.Context, p *UploadInfoParams) (*data.
 		oids[i] = part.OID.EncodeToString()
 	}

-	n.reqLogger(ctx).Debug("part details",
+	reqInfo := api.GetReqInfo(ctx)
+	n.log.Debug("part details",
+		zap.String("reqId", reqInfo.RequestID),
+		zap.String("bucket", p.Bkt.Name),
 		zap.Stringer("cid", p.Bkt.CID),
+		zap.String("object", p.Key),
 		zap.String("upload id", p.UploadID),
 		zap.Ints("part numbers", partsNumbers),
 		zap.Strings("oids", oids))
--- a/api/layer/frostfs_mock.go
+++ b/api/layer/frostfs_mock.go
@ -10,26 +10,24 @@ import (
 	"io"
 	"time"

-	objectv2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	objectv2 "github.com/TrueCloudLab/frostfs-api-go/v2/object"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-sdk-go/bearer"
+	"github.com/TrueCloudLab/frostfs-sdk-go/checksum"
+	"github.com/TrueCloudLab/frostfs-sdk-go/container"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/eacl"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/session"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 )

 type TestFrostFS struct {
 	FrostFS

 	objects      map[string]*object.Object
-	objectErrors map[string]error
 	containers   map[string]*container.Container
 	eaclTables   map[string]*eacl.Table
 	currentEpoch uint64
@ -38,7 +36,6 @@ type TestFrostFS struct {
 func NewTestFrostFS() *TestFrostFS {
 	return &TestFrostFS{
 		objects:    make(map[string]*object.Object),
-		objectErrors: make(map[string]error),
 		containers: make(map[string]*container.Container),
 		eaclTables: make(map[string]*eacl.Table),
 	}
@ -48,14 +45,6 @@ func (t *TestFrostFS) CurrentEpoch() uint64 {
 	return t.currentEpoch
 }

-func (t *TestFrostFS) SetObjectError(addr oid.Address, err error) {
-	if err == nil {
-		delete(t.objectErrors, addr.EncodeToString())
-	} else {
-		t.objectErrors[addr.EncodeToString()] = err
-	}
-}
-
 func (t *TestFrostFS) Objects() []*object.Object {
 	res := make([]*object.Object, 0, len(t.objects))

@ -66,16 +55,6 @@ func (t *TestFrostFS) Objects() []*object.Object {
 	return res
 }

-func (t *TestFrostFS) ObjectExists(objID oid.ID) bool {
-	for _, obj := range t.objects {
-		if id, _ := obj.ID(); id.Equals(objID) {
-			return true
-		}
-	}
-
-	return false
-}
-
 func (t *TestFrostFS) AddObject(key string, obj *object.Object) {
 	t.objects[key] = obj
 }
@ -163,10 +142,6 @@ func (t *TestFrostFS) ReadObject(ctx context.Context, prm PrmObjectRead) (*Objec

 	sAddr := addr.EncodeToString()

-	if err := t.objectErrors[sAddr]; err != nil {
-		return nil, err
-	}
-
 	if obj, ok := t.objects[sAddr]; ok {
 		owner := getOwner(ctx)
 		if !obj.OwnerID().Equals(owner) && !t.isPublicRead(prm.Container) {
@ -186,10 +161,10 @@ func (t *TestFrostFS) ReadObject(ctx context.Context, prm PrmObjectRead) (*Objec
 		}, nil
 	}

-	return nil, fmt.Errorf("%w: %s", apistatus.ObjectNotFound{}, addr)
+	return nil, fmt.Errorf("object not found %s", addr)
 }

-func (t *TestFrostFS) CreateObject(_ context.Context, prm PrmObjectCreate) (oid.ID, error) {
+func (t *TestFrostFS) CreateObject(ctx context.Context, prm PrmObjectCreate) (oid.ID, error) {
 	b := make([]byte, 32)
 	if _, err := io.ReadFull(rand.Reader, b); err != nil {
 		return oid.ID{}, err
@ -253,10 +228,6 @@ func (t *TestFrostFS) DeleteObject(ctx context.Context, prm PrmObjectDelete) err
 	addr.SetContainer(prm.Container)
 	addr.SetObject(prm.Object)

-	if err := t.objectErrors[addr.EncodeToString()]; err != nil {
-		return err
-	}
-
 	if obj, ok := t.objects[addr.EncodeToString()]; ok {
 		owner := getOwner(ctx)
 		if !obj.OwnerID().Equals(owner) {
@ -331,7 +302,7 @@ func (t *TestFrostFS) isPublicRead(cnrID cid.ID) bool {
 }

 func getOwner(ctx context.Context) user.ID {
-	if bd, ok := ctx.Value(middleware.BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
+	if bd, ok := ctx.Value(api.BoxData).(*accessbox.Box); ok && bd != nil && bd.Gate != nil && bd.Gate.BearerToken != nil {
 		return bearer.ResolveIssuer(*bd.Gate.BearerToken)
 	}

--- a/api/layer/notifications.go
+++ b/api/layer/notifications.go
@ -7,16 +7,16 @@ import (
 	errorsStd "errors"
 	"fmt"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 	"go.uber.org/zap"
 )

 type PutBucketNotificationConfigurationParams struct {
-	RequestInfo   *middleware.ReqInfo
+	RequestInfo   *api.ReqInfo
 	BktInfo       *data.BucketInfo
 	Configuration *data.NotificationConfiguration
-	CopiesNumbers []uint32
+	CopiesNumber  uint32
 }

 func (n *layer) PutBucketNotificationConfiguration(ctx context.Context, p *PutBucketNotificationConfigurationParams) error {
@ -31,10 +31,10 @@ func (n *layer) PutBucketNotificationConfiguration(ctx context.Context, p *PutBu
 		Payload:      bytes.NewReader(confXML),
 		Filepath:     p.BktInfo.NotificationConfigurationObjectName(),
 		CreationTime: TimeNow(ctx),
-		CopiesNumber: p.CopiesNumbers,
+		CopiesNumber: p.CopiesNumber,
 	}

-	_, objID, _, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
+	objID, _, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
 	if err != nil {
 		return err
 	}
@ -47,9 +47,10 @@ func (n *layer) PutBucketNotificationConfiguration(ctx context.Context, p *PutBu

 	if !objIDToDeleteNotFound {
 		if err = n.objectDelete(ctx, p.BktInfo, objIDToDelete); err != nil {
-			n.reqLogger(ctx).Error("couldn't delete notification configuration object", zap.Error(err),
-				zap.String("cid", p.BktInfo.CID.EncodeToString()),
-				zap.String("oid", objIDToDelete.EncodeToString()))
+			n.log.Error("couldn't delete notification configuration object", zap.Error(err),
+				zap.String("cnrID", p.BktInfo.CID.EncodeToString()),
+				zap.String("bucket name", p.BktInfo.Name),
+				zap.String("objID", objIDToDelete.EncodeToString()))
 		}
 	}

--- a/api/layer/object.go
+++ b/api/layer/object.go
@ -4,7 +4,6 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/hex"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@ -15,14 +14,14 @@ import (
 	"strings"
 	"sync"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/cache"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/cache"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	apiErrors "github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	"github.com/TrueCloudLab/frostfs-sdk-go/client"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/minio/sio"
 	"github.com/panjf2000/ants/v2"
 	"go.uber.org/zap"
@ -33,14 +32,6 @@ type (
 		// payload range
 		off, ln uint64

-		objInfo *data.ObjectInfo
-		bktInfo *data.BucketInfo
-	}
-
-	getFrostFSParams struct {
-		// payload range
-		off, ln uint64
-
 		oid     oid.ID
 		bktInfo *data.BucketInfo
 	}
@ -107,54 +98,9 @@ func (n *layer) objectHead(ctx context.Context, bktInfo *data.BucketInfo, idObj
 	return res.Head, nil
 }

-func (n *layer) initObjectPayloadReader(ctx context.Context, p getParams) (io.Reader, error) {
-	if _, isCombined := p.objInfo.Headers[MultipartObjectSize]; !isCombined {
-		return n.initFrostFSObjectPayloadReader(ctx, getFrostFSParams{
-			off:     p.off,
-			ln:      p.ln,
-			oid:     p.objInfo.ID,
-			bktInfo: p.bktInfo,
-		})
-	}
-
-	combinedObj, err := n.objectGet(ctx, p.bktInfo, p.objInfo.ID)
-	if err != nil {
-		return nil, fmt.Errorf("get combined object '%s': %w", p.objInfo.ID.EncodeToString(), err)
-	}
-
-	var parts []*data.PartInfo
-	if err = json.Unmarshal(combinedObj.Payload(), &parts); err != nil {
-		return nil, fmt.Errorf("unmarshal combined object parts: %w", err)
-	}
-
-	isEncrypted := FormEncryptionInfo(p.objInfo.Headers).Enabled
-	objParts := make([]partObj, len(parts))
-	for i, part := range parts {
-		size := part.Size
-		if isEncrypted {
-			if size, err = sio.EncryptedSize(part.Size); err != nil {
-				return nil, fmt.Errorf("compute encrypted size: %w", err)
-			}
-		}
-
-		objParts[i] = partObj{
-			OID:  part.OID,
-			Size: size,
-		}
-	}
-
-	return newMultiObjectReader(ctx, multiObjectReaderConfig{
-		layer:   n,
-		off:     p.off,
-		ln:      p.ln,
-		parts:   objParts,
-		bktInfo: p.bktInfo,
-	})
-}
-
 // initializes payload reader of the FrostFS object.
 // Zero range corresponds to full payload (panics if only offset is set).
-func (n *layer) initFrostFSObjectPayloadReader(ctx context.Context, p getFrostFSParams) (io.Reader, error) {
+func (n *layer) initObjectPayloadReader(ctx context.Context, p getParams) (io.Reader, error) {
 	prm := PrmObjectRead{
 		Container:    p.bktInfo.CID,
 		Object:       p.oid,
@ -224,7 +170,7 @@ func ParseCompletedPartHeader(hdr string) (*Part, error) {
 	if err != nil {
 		return nil, fmt.Errorf("invalid completed part number '%s': %w", partInfo[0], err)
 	}
-	size, err := strconv.ParseUint(partInfo[1], 10, 64)
+	size, err := strconv.Atoi(partInfo[1])
 	if err != nil {
 		return nil, fmt.Errorf("invalid completed part size '%s': %w", partInfo[1], err)
 	}
@ -232,7 +178,7 @@ func ParseCompletedPartHeader(hdr string) (*Part, error) {
 	return &Part{
 		ETag:       partInfo[2],
 		PartNumber: num,
-		Size:       size,
+		Size:       int64(size),
 	}, nil
 }

@ -245,18 +191,26 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 		return nil, fmt.Errorf("couldn't get versioning settings object: %w", err)
 	}

+	newVersion := &data.NodeVersion{
+		BaseNodeVersion: data.BaseNodeVersion{
+			FilePath: p.Object,
+			Size:     p.Size,
+		},
+		IsUnversioned: !bktSettings.VersioningEnabled(),
+	}
+
 	r := p.Reader
 	if p.Encryption.Enabled() {
-		p.Header[AttributeDecryptedSize] = strconv.FormatUint(p.Size, 10)
+		p.Header[AttributeDecryptedSize] = strconv.FormatInt(p.Size, 10)
 		if err = addEncryptionHeaders(p.Header, p.Encryption); err != nil {
 			return nil, fmt.Errorf("add encryption header: %w", err)
 		}

 		var encSize uint64
-		if r, encSize, err = encryptionReader(p.Reader, p.Size, p.Encryption.Key()); err != nil {
+		if r, encSize, err = encryptionReader(p.Reader, uint64(p.Size), p.Encryption.Key()); err != nil {
 			return nil, fmt.Errorf("create encrypter: %w", err)
 		}
-		p.Size = encSize
+		p.Size = int64(encSize)
 	}

 	if r != nil {
@ -276,11 +230,11 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 	prm := PrmObjectCreate{
 		Container:    p.BktInfo.CID,
 		Creator:      owner,
-		PayloadSize:  p.Size,
+		PayloadSize:  uint64(p.Size),
 		Filepath:     p.Object,
 		Payload:      r,
 		CreationTime: TimeNow(ctx),
-		CopiesNumber: p.CopiesNumbers,
+		CopiesNumber: p.CopiesNumber,
 	}

 	prm.Attributes = make([][2]string, 0, len(p.Header))
@ -289,24 +243,19 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 		prm.Attributes = append(prm.Attributes, [2]string{k, v})
 	}

-	size, id, hash, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
+	id, hash, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
 	if err != nil {
 		return nil, err
 	}

-	n.reqLogger(ctx).Debug("put object", zap.Stringer("cid", p.BktInfo.CID), zap.Stringer("oid", id))
-
-	newVersion := &data.NodeVersion{
-		BaseNodeVersion: data.BaseNodeVersion{
-			OID:      id,
-			ETag:     hex.EncodeToString(hash),
-			FilePath: p.Object,
-			Size:     size,
-		},
-		IsUnversioned: !bktSettings.VersioningEnabled(),
-		IsCombined:    p.Header[MultipartObjectSize] != "",
-	}
+	reqInfo := api.GetReqInfo(ctx)
+	n.log.Debug("put object",
+		zap.String("reqId", reqInfo.RequestID),
+		zap.String("bucket", p.BktInfo.Name), zap.Stringer("cid", p.BktInfo.CID),
+		zap.String("object", p.Object), zap.Stringer("oid", id))

+	newVersion.OID = id
+	newVersion.ETag = hex.EncodeToString(hash)
 	if newVersion.ID, err = n.treeService.AddVersion(ctx, p.BktInfo, newVersion); err != nil {
 		return nil, fmt.Errorf("couldn't add new verion to tree service: %w", err)
 	}
@ -319,7 +268,7 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 				VersionID:  id.EncodeToString(),
 			},
 			NewLock:      p.Lock,
-			CopiesNumbers: p.CopiesNumbers,
+			CopiesNumber: p.CopiesNumber,
 			NodeVersion:  newVersion, // provide new version to make one less tree service call in PutLockInfo
 		}

@ -337,7 +286,7 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Extend
 		Owner:       owner,
 		Bucket:      p.BktInfo.Name,
 		Name:        p.Object,
-		Size:        size,
+		Size:        p.Size,
 		Created:     prm.CreationTime,
 		Headers:     p.Header,
 		ContentType: p.Header[api.ContentType],
@ -363,20 +312,17 @@ func (n *layer) headLastVersionIfNotDeleted(ctx context.Context, bkt *data.Bucke
 	node, err := n.treeService.GetLatestVersion(ctx, bkt, objectName)
 	if err != nil {
 		if errors.Is(err, ErrNodeNotFound) {
-			return nil, fmt.Errorf("%w: %s", apiErrors.GetAPIError(apiErrors.ErrNoSuchKey), err.Error())
+			return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchKey)
 		}
 		return nil, err
 	}

 	if node.IsDeleteMarker() {
-		return nil, fmt.Errorf("%w: found version is delete marker", apiErrors.GetAPIError(apiErrors.ErrNoSuchKey))
+		return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchKey)
 	}

 	meta, err := n.objectHead(ctx, bkt, node.OID)
 	if err != nil {
-		if client.IsErrObjectNotFound(err) {
-			return nil, fmt.Errorf("%w: %s", apiErrors.GetAPIError(apiErrors.ErrNoSuchKey), err.Error())
-		}
 		return nil, err
 	}
 	objInfo := objectInfoFromMeta(bkt, meta)
@ -398,7 +344,7 @@ func (n *layer) headVersion(ctx context.Context, bkt *data.BucketInfo, p *HeadOb
 		foundVersion, err = n.treeService.GetUnversioned(ctx, bkt, p.Object)
 		if err != nil {
 			if errors.Is(err, ErrNodeNotFound) {
-				return nil, fmt.Errorf("%w: %s", apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion), err.Error())
+				return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion)
 			}
 			return nil, err
 		}
@ -415,7 +361,7 @@ func (n *layer) headVersion(ctx context.Context, bkt *data.BucketInfo, p *HeadOb
 			}
 		}
 		if foundVersion == nil {
-			return nil, fmt.Errorf("%w: there isn't tree node with requested version id", apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion))
+			return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion)
 		}
 	}

@ -427,7 +373,7 @@ func (n *layer) headVersion(ctx context.Context, bkt *data.BucketInfo, p *HeadOb
 	meta, err := n.objectHead(ctx, bkt, foundVersion.OID)
 	if err != nil {
 		if client.IsErrObjectNotFound(err) {
-			return nil, fmt.Errorf("%w: %s", apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion), err.Error())
+			return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchVersion)
 		}
 		return nil, err
 	}
@ -459,19 +405,17 @@ func (n *layer) objectDelete(ctx context.Context, bktInfo *data.BucketInfo, idOb

 // objectPutAndHash prepare auth parameters and invoke frostfs.CreateObject.
 // Returns object ID and payload sha256 hash.
-func (n *layer) objectPutAndHash(ctx context.Context, prm PrmObjectCreate, bktInfo *data.BucketInfo) (uint64, oid.ID, []byte, error) {
+func (n *layer) objectPutAndHash(ctx context.Context, prm PrmObjectCreate, bktInfo *data.BucketInfo) (oid.ID, []byte, error) {
 	n.prepareAuthParameters(ctx, &prm.PrmAuth, bktInfo.Owner)
-	var size uint64
 	hash := sha256.New()
 	prm.Payload = wrapReader(prm.Payload, 64*1024, func(buf []byte) {
-		size += uint64(len(buf))
 		hash.Write(buf)
 	})
 	id, err := n.frostFS.CreateObject(ctx, prm)
 	if err != nil {
-		return 0, oid.ID{}, nil, err
+		return oid.ID{}, nil, err
 	}
-	return size, id, hash.Sum(nil), nil
+	return id, hash.Sum(nil), nil
 }

 // ListObjectsV1 returns objects in a bucket for requests of Version 1.
@ -616,8 +560,7 @@ func nodesGenerator(ctx context.Context, p allObjectParams, nodeVersions []*data
 }

 func (n *layer) initWorkerPool(ctx context.Context, size int, p allObjectParams, input <-chan *data.NodeVersion) (<-chan *data.ObjectInfo, error) {
-	reqLog := n.reqLogger(ctx)
-	pool, err := ants.NewPool(size, ants.WithLogger(&logWrapper{reqLog}))
+	pool, err := ants.NewPool(size, ants.WithLogger(&logWrapper{n.log}))
 	if err != nil {
 		return nil, fmt.Errorf("coudln't init go pool for listing: %w", err)
 	}
@ -644,8 +587,8 @@ func (n *layer) initWorkerPool(ctx context.Context, size int, p allObjectParams,
 					if oi == nil {
 						// try to get object again
 						if oi = n.objectInfoFromObjectsCacheOrFrostFS(ctx, p.Bucket, node, p.Prefix, p.Delimiter); oi == nil {
-							// do not process object which are definitely missing in object service
-							return
+							// form object info with data that the tree node contains
+							oi = getPartialObjectInfo(p.Bucket, node)
 						}
 					}
 					select {
@ -655,7 +598,7 @@ func (n *layer) initWorkerPool(ctx context.Context, size int, p allObjectParams,
 				})
 				if err != nil {
 					wg.Done()
-					reqLog.Warn("failed to submit task to pool", zap.Error(err))
+					n.log.Warn("failed to submit task to pool", zap.Error(err))
 				}
 			}(node)
 		}
@ -667,6 +610,18 @@ func (n *layer) initWorkerPool(ctx context.Context, size int, p allObjectParams,
 	return objCh, nil
 }

+// getPartialObjectInfo form data.ObjectInfo using data available in data.NodeVersion.
+func getPartialObjectInfo(bktInfo *data.BucketInfo, node *data.NodeVersion) *data.ObjectInfo {
+	return &data.ObjectInfo{
+		ID:      node.OID,
+		CID:     bktInfo.CID,
+		Bucket:  bktInfo.Name,
+		Name:    node.FilePath,
+		Size:    node.Size,
+		HashSum: node.ETag,
+	}
+}
+
 func (n *layer) bucketNodeVersions(ctx context.Context, bkt *data.BucketInfo, prefix string) ([]*data.NodeVersion, error) {
 	var err error

@ -797,7 +752,7 @@ func (n *layer) objectInfoFromObjectsCacheOrFrostFS(ctx context.Context, bktInfo

 	meta, err := n.objectHead(ctx, bktInfo, node.OID)
 	if err != nil {
-		n.reqLogger(ctx).Warn("could not fetch object meta", zap.Error(err))
+		n.log.Warn("could not fetch object meta", zap.Error(err))
 		return nil
 	}

--- a/api/layer/system_object.go
+++ b/api/layer/system_object.go
@ -9,20 +9,20 @@ import (
 	"strconv"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 )

 const (
 	AttributeComplianceMode  = ".s3-compliance-mode"
+	AttributeExpirationEpoch = "__NEOFS__EXPIRATION_EPOCH"
 )

 type PutLockInfoParams struct {
 	ObjVersion   *ObjectVersion
 	NewLock      *data.ObjectLock
-	CopiesNumbers []uint32
+	CopiesNumber uint32
 	NodeVersion  *data.NodeVersion // optional
 }

@ -68,7 +68,7 @@ func (n *layer) PutLockInfo(ctx context.Context, p *PutLockInfoParams) (err erro
 			}
 		}
 		lock := &data.ObjectLock{Retention: newLock.Retention}
-		retentionOID, err := n.putLockObject(ctx, p.ObjVersion.BktInfo, versionNode.OID, lock, p.CopiesNumbers)
+		retentionOID, err := n.putLockObject(ctx, p.ObjVersion.BktInfo, versionNode.OID, lock, p.CopiesNumber)
 		if err != nil {
 			return err
 		}
@ -78,7 +78,7 @@ func (n *layer) PutLockInfo(ctx context.Context, p *PutLockInfoParams) (err erro
 	if newLock.LegalHold != nil {
 		if newLock.LegalHold.Enabled && !lockInfo.IsLegalHoldSet() {
 			lock := &data.ObjectLock{LegalHold: newLock.LegalHold}
-			legalHoldOID, err := n.putLockObject(ctx, p.ObjVersion.BktInfo, versionNode.OID, lock, p.CopiesNumbers)
+			legalHoldOID, err := n.putLockObject(ctx, p.ObjVersion.BktInfo, versionNode.OID, lock, p.CopiesNumber)
 			if err != nil {
 				return err
 			}
@ -111,7 +111,7 @@ func (n *layer) getNodeVersionFromCacheOrFrostfs(ctx context.Context, objVersion
 	return nodeVersion, nil
 }

-func (n *layer) putLockObject(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, lock *data.ObjectLock, copiesNumber []uint32) (oid.ID, error) {
+func (n *layer) putLockObject(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, lock *data.ObjectLock, copiesNumber uint32) (oid.ID, error) {
 	prm := PrmObjectCreate{
 		Container:    bktInfo.CID,
 		Creator:      bktInfo.Owner,
@ -126,7 +126,7 @@ func (n *layer) putLockObject(ctx context.Context, bktInfo *data.BucketInfo, obj
 		return oid.ID{}, err
 	}

-	_, id, _, err := n.objectPutAndHash(ctx, prm, bktInfo)
+	id, _, err := n.objectPutAndHash(ctx, prm, bktInfo)
 	return id, err
 }

@ -167,7 +167,7 @@ func (n *layer) getCORS(ctx context.Context, bkt *data.BucketInfo) (*data.CORSCo
 	}

 	if objIDNotFound {
-		return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
+		return nil, errors.GetAPIError(errors.ErrNoSuchCORSConfiguration)
 	}

 	obj, err := n.objectGet(ctx, bkt, objID)
@ -238,7 +238,7 @@ func (n *layer) attributesFromLock(ctx context.Context, lock *data.ObjectLock) (
 	}

 	if lock.LegalHold != nil && lock.LegalHold.Enabled {
-		// todo: (@KirillovDenis) reconsider this when FrostFS will support Legal Hold https://git.frostfs.info/TrueCloudLab/frostfs-contract/issues/2
+		// todo: (@KirillovDenis) reconsider this when FrostFS will support Legal Hold https://github.com/TrueCloudLab/frostfs-contract/issues/2
 		// Currently lock object must have an expiration epoch.
 		// Besides we need to override retention expiration epoch since legal hold cannot be deleted yet.
 		expEpoch = math.MaxUint64
@ -246,7 +246,7 @@ func (n *layer) attributesFromLock(ctx context.Context, lock *data.ObjectLock) (

 	if expEpoch != 0 {
 		result = append(result, [2]string{
-			object.SysAttributeExpEpoch, strconv.FormatUint(expEpoch, 10),
+			AttributeExpirationEpoch, strconv.FormatUint(expEpoch, 10),
 		})
 	}

--- a/api/layer/tagging.go
+++ b/api/layer/tagging.go
@ -2,14 +2,14 @@ package layer

 import (
 	"context"
-	"errors"
-	"fmt"
+	errorsStd "errors"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	s3errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/errors"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"go.uber.org/zap"
 )

@ -53,8 +53,8 @@ func (n *layer) GetObjectTagging(ctx context.Context, p *GetObjectTaggingParams)

 	tags, err := n.treeService.GetObjectTagging(ctx, p.ObjectVersion.BktInfo, nodeVersion)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return "", nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
+		if errorsStd.Is(err, ErrNodeNotFound) {
+			return "", nil, errors.GetAPIError(errors.ErrNoSuchKey)
 		}
 		return "", nil, err
 	}
@ -76,8 +76,8 @@ func (n *layer) PutObjectTagging(ctx context.Context, p *PutObjectTaggingParams)

 	err = n.treeService.PutObjectTagging(ctx, p.ObjectVersion.BktInfo, nodeVersion, p.TagSet)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
+		if errorsStd.Is(err, ErrNodeNotFound) {
+			return nil, errors.GetAPIError(errors.ErrNoSuchKey)
 		}
 		return nil, err
 	}
@ -95,8 +95,8 @@ func (n *layer) DeleteObjectTagging(ctx context.Context, p *ObjectVersion) (*dat

 	err = n.treeService.DeleteObjectTagging(ctx, p.BktInfo, version)
 	if err != nil {
-		if errors.Is(err, ErrNodeNotFound) {
-			return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
+		if errorsStd.Is(err, ErrNodeNotFound) {
+			return nil, errors.GetAPIError(errors.ErrNoSuchKey)
 		}
 		return nil, err
 	}
@ -116,7 +116,7 @@ func (n *layer) GetBucketTagging(ctx context.Context, bktInfo *data.BucketInfo)
 	}

 	tags, err := n.treeService.GetBucketTagging(ctx, bktInfo)
-	if err != nil && !errors.Is(err, ErrNodeNotFound) {
+	if err != nil && !errorsStd.Is(err, ErrNodeNotFound) {
 		return nil, err
 	}

@ -169,19 +169,20 @@ func (n *layer) getNodeVersion(ctx context.Context, objVersion *ObjectVersion) (
 			}
 		}
 		if version == nil {
-			err = fmt.Errorf("%w: there isn't tree node with requested version id", s3errors.GetAPIError(s3errors.ErrNoSuchVersion))
+			err = errors.GetAPIError(errors.ErrNoSuchVersion)
 		}
 	}

-	if err == nil && version.IsDeleteMarker() && !objVersion.NoErrorOnDeleteMarker {
-		return nil, fmt.Errorf("%w: found version is delete marker", s3errors.GetAPIError(s3errors.ErrNoSuchKey))
-	} else if errors.Is(err, ErrNodeNotFound) {
-		return nil, fmt.Errorf("%w: %s", s3errors.GetAPIError(s3errors.ErrNoSuchKey), err.Error())
+	if err == nil && version.IsDeleteMarker() && !objVersion.NoErrorOnDeleteMarker || errorsStd.Is(err, ErrNodeNotFound) {
+		return nil, errors.GetAPIError(errors.ErrNoSuchKey)
 	}

 	if err == nil && version != nil && !version.IsDeleteMarker() {
-		n.reqLogger(ctx).Debug("get tree node",
-			zap.Stringer("cid", objVersion.BktInfo.CID), zap.Stringer("oid", version.OID))
+		reqInfo := api.GetReqInfo(ctx)
+		n.log.Debug("target details",
+			zap.String("reqId", reqInfo.RequestID),
+			zap.String("bucket", objVersion.BktInfo.Name), zap.Stringer("cid", objVersion.BktInfo.CID),
+			zap.String("object", objVersion.ObjectName), zap.Stringer("oid", version.OID))
 	}

 	return version, err
--- a/api/layer/tree_mock.go
+++ b/api/layer/tree_mock.go
@ -6,8 +6,8 @@ import (
 	"sort"
 	"strings"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 )

 type TreeServiceMock struct {
@ -59,17 +59,17 @@ func (t *TreeServiceMock) DeleteObjectTagging(_ context.Context, bktInfo *data.B
 	return nil
 }

-func (t *TreeServiceMock) GetBucketTagging(context.Context, *data.BucketInfo) (map[string]string, error) {
+func (t *TreeServiceMock) GetBucketTagging(ctx context.Context, bktInfo *data.BucketInfo) (map[string]string, error) {
 	// TODO implement me
 	panic("implement me")
 }

-func (t *TreeServiceMock) PutBucketTagging(context.Context, *data.BucketInfo, map[string]string) error {
+func (t *TreeServiceMock) PutBucketTagging(ctx context.Context, bktInfo *data.BucketInfo, tagSet map[string]string) error {
 	// TODO implement me
 	panic("implement me")
 }

-func (t *TreeServiceMock) DeleteBucketTagging(context.Context, *data.BucketInfo) error {
+func (t *TreeServiceMock) DeleteBucketTagging(ctx context.Context, bktInfo *data.BucketInfo) error {
 	// TODO implement me
 	panic("implement me")
 }
@ -100,15 +100,15 @@ func (t *TreeServiceMock) GetSettingsNode(_ context.Context, bktInfo *data.Bucke
 	return settings, nil
 }

-func (t *TreeServiceMock) GetNotificationConfigurationNode(context.Context, *data.BucketInfo) (oid.ID, error) {
+func (t *TreeServiceMock) GetNotificationConfigurationNode(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
 	panic("implement me")
 }

-func (t *TreeServiceMock) PutNotificationConfigurationNode(context.Context, *data.BucketInfo, oid.ID) (oid.ID, error) {
+func (t *TreeServiceMock) PutNotificationConfigurationNode(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error) {
 	panic("implement me")
 }

-func (t *TreeServiceMock) GetBucketCORS(_ context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
+func (t *TreeServiceMock) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
 	systemMap, ok := t.system[bktInfo.CID.EncodeToString()]
 	if !ok {
 		return oid.ID{}, nil
@ -122,7 +122,7 @@ func (t *TreeServiceMock) GetBucketCORS(_ context.Context, bktInfo *data.BucketI
 	return node.OID, nil
 }

-func (t *TreeServiceMock) PutBucketCORS(_ context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error) {
+func (t *TreeServiceMock) PutBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error) {
 	systemMap, ok := t.system[bktInfo.CID.EncodeToString()]
 	if !ok {
 		systemMap = make(map[string]*data.BaseNodeVersion)
@ -137,7 +137,7 @@ func (t *TreeServiceMock) PutBucketCORS(_ context.Context, bktInfo *data.BucketI
 	return oid.ID{}, ErrNoNodeToRemove
 }

-func (t *TreeServiceMock) DeleteBucketCORS(context.Context, *data.BucketInfo) (oid.ID, error) {
+func (t *TreeServiceMock) DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
 	panic("implement me")
 }

@ -314,7 +314,7 @@ func (t *TreeServiceMock) CreateMultipartUpload(_ context.Context, bktInfo *data
 	return nil
 }

-func (t *TreeServiceMock) GetMultipartUploadsByPrefix(context.Context, *data.BucketInfo, string) ([]*data.MultipartInfo, error) {
+func (t *TreeServiceMock) GetMultipartUploadsByPrefix(ctx context.Context, bktInfo *data.BucketInfo, prefix string) ([]*data.MultipartInfo, error) {
 	panic("implement me")
 }

@ -407,7 +407,7 @@ LOOP:
 	return nil
 }

-func (t *TreeServiceMock) PutLock(_ context.Context, bktInfo *data.BucketInfo, nodeID uint64, lock *data.LockInfo) error {
+func (t *TreeServiceMock) PutLock(ctx context.Context, bktInfo *data.BucketInfo, nodeID uint64, lock *data.LockInfo) error {
 	cnrLockMap, ok := t.locks[bktInfo.CID.EncodeToString()]
 	if !ok {
 		t.locks[bktInfo.CID.EncodeToString()] = map[uint64]*data.LockInfo{
@ -421,7 +421,7 @@ func (t *TreeServiceMock) PutLock(_ context.Context, bktInfo *data.BucketInfo, n
 	return nil
 }

-func (t *TreeServiceMock) GetLock(_ context.Context, bktInfo *data.BucketInfo, nodeID uint64) (*data.LockInfo, error) {
+func (t *TreeServiceMock) GetLock(ctx context.Context, bktInfo *data.BucketInfo, nodeID uint64) (*data.LockInfo, error) {
 	cnrLockMap, ok := t.locks[bktInfo.CID.EncodeToString()]
 	if !ok {
 		return nil, nil
--- a/api/layer/tree_service.go
+++ b/api/layer/tree_service.go
@ -4,8 +4,8 @@ import (
 	"context"
 	"errors"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
 )

 // TreeService provide interface to interact with tree service using s3 data models.
--- a/api/layer/util.go
+++ b/api/layer/util.go
@ -9,11 +9,11 @@ import (
 	"strings"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	"github.com/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
+	"github.com/TrueCloudLab/frostfs-sdk-go/object"
 )

 type (
@ -74,7 +74,7 @@ func objectInfoFromMeta(bkt *data.BucketInfo, meta *object.Object) *data.ObjectI
 		mimeType = contentType
 		delete(headers, object.AttributeContentType)
 	}
-	if val, ok := headers[object.AttributeTimestamp]; !ok { //nolint:revive
+	if val, ok := headers[object.AttributeTimestamp]; !ok {
 		// ignore empty value
 	} else if dt, err := strconv.ParseInt(val, 10, 64); err == nil {
 		creation = time.Unix(dt, 0)
@ -94,8 +94,7 @@ func objectInfoFromMeta(bkt *data.BucketInfo, meta *object.Object) *data.ObjectI
 		ContentType: mimeType,
 		Headers:     headers,
 		Owner:       *meta.OwnerID(),
-		Size:          meta.PayloadSize(),
-		CreationEpoch: meta.CreationEpoch(),
+		Size:        int64(meta.PayloadSize()),
 		HashSum:     hex.EncodeToString(payloadChecksum.Value()),
 	}
 }
@ -141,7 +140,7 @@ func NameFromString(name string) (string, string) {
 // GetBoxData  extracts accessbox.Box from context.
 func GetBoxData(ctx context.Context) (*accessbox.Box, error) {
 	var boxData *accessbox.Box
-	data, ok := ctx.Value(middleware.BoxData).(*accessbox.Box)
+	data, ok := ctx.Value(api.BoxData).(*accessbox.Box)
 	if !ok || data == nil {
 		return nil, fmt.Errorf("couldn't get box data from context")
 	}
--- a/api/layer/util_test.go
+++ b/api/layer/util_test.go
@ -6,18 +6,18 @@ import (
 	"testing"
 	"time"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-sdk-go/checksum"
+	cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/stretchr/testify/require"
 )

 var (
 	defaultTestCreated       = time.Now()
 	defaultTestPayload       = []byte("test object payload")
-	defaultTestPayloadLength = uint64(len(defaultTestPayload))
+	defaultTestPayloadLength = int64(len(defaultTestPayload))
 	defaultTestContentType   = http.DetectContentType(defaultTestPayload)
 )

--- a/api/layer/versioning.go
+++ b/api/layer/versioning.go
@ -4,7 +4,7 @@ import (
 	"context"
 	"sort"

-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
+	"github.com/TrueCloudLab/frostfs-s3-gw/api/data"
 )

 func (n *layer) ListObjectVersions(ctx context.Context, p *ListObjectVersionsParams) (*ListObjectVersionsInfo, error) {
--- a/Show more
+++ b/Show more