[#XX] object: Support FilterHeaderECParent for Search

* Update frostfs-api-go/v2 version;
* Add unit-test for `FilterHeaderECParent`.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

.forgejo/workflows/dco.yml

@@ -16,6 +16,6 @@ jobs:
           go-version: '1.21'
 
       - name: Run commit format checker
-        uses: https://git.frostfs.info/TrueCloudLab/dco-go@v2
+        uses: https://git.frostfs.info/TrueCloudLab/dco-go@v3
         with:
           from: 'origin/${{ github.event.pull_request.base.ref }}'

.forgejo/workflows/tests.yml

@@ -8,17 +8,24 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: golangci-lint
+      - name: Set up Go
-        uses: https://github.com/golangci/golangci-lint-action@v2
+        uses: actions/setup-go@v3
         with:
-          version: latest
+          go-version: '1.21'
+          cache: true
+
+      - name: Install linters
+        run: make lint-install
+
+      - name: Run linters
+        run: make lint
 
   tests:
     name: Tests
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go_versions: [ '1.19', '1.20' ]
+        go_versions: [ '1.20', '1.21' ]
       fail-fast: false
     steps:
       - uses: actions/checkout@v3

.gitignore

@@ -27,3 +27,7 @@ antlr-*.jar
 
 # tempfiles
 .cache
+
+# binary
+bin/
+release/

.gitlint

@@ -1,10 +0,0 @@
-[general]
-fail-without-commits=true
-contrib=CC1
-
-[title-match-regex]
-regex=^\[\#[0-9Xx]+\]\s
-
-[ignore-by-title]
-regex=^Release(.*)
-ignore=title-match-regex

.pre-commit-config.yaml

@@ -18,13 +18,19 @@ repos:
     - id: end-of-file-fixer
       exclude: "(.key|.interp|.tokens)$"
 
-  - repo: https://github.com/golangci/golangci-lint
+  - repo: local
-    rev: v1.51.2
     hooks:
-    - id: golangci-lint
+       - id: go-unit-tests
+         name: go unit tests
+         entry: make test GOFLAGS=''
+         pass_filenames: false
+         types: [go]
+         language: system
 
-  - repo: https://github.com/jorisroovers/gitlint
+  - repo: local
-    rev:  v0.18.0
     hooks:
-      - id: gitlint
+      - id: make-lint
-        stages: [commit-msg]
+        name: Run Make Lint
+        entry: make lint
+        language: system
+        pass_filenames: false

Makefile

@@ -1,10 +1,16 @@
 #!/usr/bin/make -f
 
 ANTLR_VERSION="4.13.0"
+TMP_DIR := .cache
+LINT_VERSION ?= 1.56.2
+TRUECLOUDLAB_LINT_VERSION ?= 0.0.2
+OUTPUT_LINT_DIR ?= $(shell pwd)/bin
+LINT_DIR = $(OUTPUT_LINT_DIR)/golangci-lint-$(LINT_VERSION)-v$(TRUECLOUDLAB_LINT_VERSION)
 
 # Run tests
+test: GOFLAGS ?= "-cover -count=1"
 test:
-	@go test ./... -cover
+	@GOFLAGS=$(GOFLAGS) go test ./...
 
 # Pull go dependencies
 dep:
@@ -15,9 +21,23 @@ dep:
 	@CGO_ENABLED=0 \
 	go mod tidy -v && echo OK
 
+# Install linters
+lint-install:
+	@mkdir -p $(TMP_DIR)
+	@rm -rf $(TMP_DIR)/linters
+	@git -c advice.detachedHead=false clone --branch v$(TRUECLOUDLAB_LINT_VERSION) https://git.frostfs.info/TrueCloudLab/linters.git $(TMP_DIR)/linters
+	@@make -C $(TMP_DIR)/linters lib CGO_ENABLED=1 OUT_DIR=$(OUTPUT_LINT_DIR)
+	@rm -rf $(TMP_DIR)/linters
+	@rmdir $(TMP_DIR) 2>/dev/null || true
+	@CGO_ENABLED=1 GOBIN=$(LINT_DIR) go install github.com/golangci/golangci-lint/cmd/golangci-lint@v$(LINT_VERSION)
+
 # Run linters
 lint:
-	@golangci-lint --timeout=5m run
+	@if [ ! -d "$(LINT_DIR)" ]; then \
+		echo "Run make lint-install"; \
+		exit 1; \
+	fi
+	$(LINT_DIR)/golangci-lint run
 
 # Run tests with race detection and produce coverage output
 cover:

README.md

@@ -42,7 +42,6 @@ Contains client for working with FrostFS.
 ```go
 var prmInit client.PrmInit
 prmInit.SetDefaultPrivateKey(key) // private key for request signing
-prmInit.ResolveFrostFSFailures() // enable erroneous status parsing
 
 var c client.Client
 c.Init(prmInit)
@@ -77,8 +76,7 @@ if needed and perform any desired action. In the case above we may want to repor
 these details to the user as well as retry an operation, possibly with different parameters.
 Status wire-format is extendable and each node can report any set of details it wants.
 The set of reserved status codes can be found in
-[FrostFS API](https://git.frostfs.info/TrueCloudLab/frostfs-api/src/branch/master/status/types.proto). There is also
+[FrostFS API](https://git.frostfs.info/TrueCloudLab/frostfs-api/src/branch/master/status/types.proto).
-a `client.PrmInit.ResolveFrostFSFailures()` to seamlessly convert erroneous statuses into Go error type.
 
 ### policy
 Contains helpers allowing conversion of placing policy from/to JSON representation

bearer/bearer_test.go

@@ -107,7 +107,7 @@ func TestToken_ForUser(t *testing.T) {
 	require.Zero(t, m.GetBody())
 
 	// set value
-	usr := *usertest.ID()
+	usr := usertest.ID()
 
 	var usrV2 refs.OwnerID
 	usr.WriteToV2(&usrV2)
@@ -243,11 +243,11 @@ func TestToken_AssertContainer(t *testing.T) {
 
 func TestToken_AssertUser(t *testing.T) {
 	var val bearer.Token
-	usr := *usertest.ID()
+	usr := usertest.ID()
 
 	require.True(t, val.AssertUser(usr))
 
-	val.ForUser(*usertest.ID())
+	val.ForUser(usertest.ID())
 	require.False(t, val.AssertUser(usr))
 
 	val.ForUser(usr)
@@ -332,7 +332,7 @@ func TestToken_ReadFromV2(t *testing.T) {
 	val.WriteToV2(&m2)
 	require.Equal(t, m, m2)
 
-	usr, usr2 := *usertest.ID(), *usertest.ID()
+	usr, usr2 := usertest.ID(), usertest.ID()
 
 	require.True(t, val.AssertUser(usr))
 	require.True(t, val.AssertUser(usr2))

bearer/test/generate.go

@@ -13,7 +13,7 @@ func Token() (t bearer.Token) {
 	t.SetExp(3)
 	t.SetNbf(2)
 	t.SetIat(1)
-	t.ForUser(*usertest.ID())
+	t.ForUser(usertest.ID())
 	t.SetEACLTable(*eacltest.Table())
 
 	return t

client/accounting.go

@@ -17,26 +17,26 @@ import (
 
 // PrmBalanceGet groups parameters of BalanceGet operation.
 type PrmBalanceGet struct {
-	prmCommonMeta
+	XHeaders []string
 
-	accountSet bool
+	Account user.ID
-	account    user.ID
 }
 
 // SetAccount sets identifier of the FrostFS account for which the balance is requested.
 // Required parameter.
+//
+// Deprecated: Use PrmBalanceGet.Account instead.
 func (x *PrmBalanceGet) SetAccount(id user.ID) {
-	x.account = id
+	x.Account = id
-	x.accountSet = true
 }
 
 func (x *PrmBalanceGet) buildRequest(c *Client) (*v2accounting.BalanceRequest, error) {
-	if !x.accountSet {
+	if x.Account.IsEmpty() {
 		return nil, errorAccountNotSet
 	}
 
 	var accountV2 refs.OwnerID
-	x.account.WriteToV2(&accountV2)
+	x.Account.WriteToV2(&accountV2)
 
 	var body v2accounting.BalanceRequestBody
 	body.SetOwnerID(&accountV2)
@@ -64,9 +64,9 @@ func (x ResBalanceGet) Amount() accounting.Decimal {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`,
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmBalanceGet docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -79,7 +79,7 @@ func (c *Client) BalanceGet(ctx context.Context, prm PrmBalanceGet) (*ResBalance
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/client.go

@@ -78,31 +78,22 @@ func (c *Client) Init(prm PrmInit) {
 //
 // See also Init / Close.
 func (c *Client) Dial(ctx context.Context, prm PrmDial) error {
-	if prm.endpoint == "" {
+	if prm.Endpoint == "" {
 		return errorServerAddrUnset
 	}
 
-	if prm.timeoutDialSet {
+	if prm.DialTimeout <= 0 {
-		if prm.timeoutDial <= 0 {
+		prm.DialTimeout = defaultDialTimeout
-			return errorNonPositiveTimeout
-		}
-	} else {
-		prm.timeoutDial = 5 * time.Second
 	}
-
+	if prm.StreamTimeout <= 0 {
-	if prm.streamTimeoutSet {
+		prm.StreamTimeout = defaultStreamTimeout
-		if prm.streamTimeout <= 0 {
-			return errorNonPositiveTimeout
-		}
-	} else {
-		prm.streamTimeout = 10 * time.Second
 	}
 
 	c.c = *client.New(append(
-		client.WithNetworkURIAddress(prm.endpoint, prm.tlsConfig),
+		client.WithNetworkURIAddress(prm.Endpoint, prm.TLSConfig),
-		client.WithDialTimeout(prm.timeoutDial),
+		client.WithDialTimeout(prm.DialTimeout),
-		client.WithRWTimeout(prm.streamTimeout),
+		client.WithRWTimeout(prm.StreamTimeout),
-		client.WithGRPCDialOptions(prm.dialOptions),
+		client.WithGRPCDialOptions(prm.GRPCDialOptions),
 	)...)
 
 	c.setFrostFSAPIServer((*coreServer)(&c.c))
@@ -144,52 +135,67 @@ func (c *Client) Close() error {
 //
 // See also Init.
 type PrmInit struct {
-	resolveFrostFSErrors bool
+	DisableFrostFSErrorResolution bool
 
-	key ecdsa.PrivateKey
+	Key ecdsa.PrivateKey
 
-	cbRespInfo func(ResponseMetaInfo) error
+	ResponseInfoCallback func(ResponseMetaInfo) error
 
-	netMagic uint64
+	NetMagic uint64
 }
 
 // SetDefaultPrivateKey sets Client private key to be used for the protocol
 // communication by default.
 //
 // Required for operations without custom key parametrization (see corresponding Prm* docs).
+//
+// Deprecated: Use PrmInit.Key instead.
 func (x *PrmInit) SetDefaultPrivateKey(key ecdsa.PrivateKey) {
-	x.key = key
+	x.Key = key
 }
 
-// ResolveFrostFSFailures makes the Client to resolve failure statuses of the
+// Deprecated: method is no-op. Option is default.
-// FrostFS protocol into Go built-in errors. These errors are returned from
-// each protocol operation. By default, statuses aren't resolved and written
-// to the resulting structure (see corresponding Res* docs).
 func (x *PrmInit) ResolveFrostFSFailures() {
-	x.resolveFrostFSErrors = true
+}
+
+// DisableFrostFSFailuresResolution makes the Client to preserve failure statuses of the
+// FrostFS protocol only in resulting structure (see corresponding Res* docs).
+// These errors are returned from each protocol operation. By default, statuses
+// are resolved and returned as a Go built-in errors.
+//
+// Deprecated: Use PrmInit.DisableFrostFSErrorResolution instead.
+func (x *PrmInit) DisableFrostFSFailuresResolution() {
+	x.DisableFrostFSErrorResolution = true
 }
 
 // SetResponseInfoCallback makes the Client to pass ResponseMetaInfo from each
 // FrostFS server response to f. Nil (default) means ignore response meta info.
+//
+// Deprecated: Use PrmInit.ResponseInfoCallback instead.
 func (x *PrmInit) SetResponseInfoCallback(f func(ResponseMetaInfo) error) {
-	x.cbRespInfo = f
+	x.ResponseInfoCallback = f
 }
 
+const (
+	defaultDialTimeout   = 5 * time.Second
+	defaultStreamTimeout = 10 * time.Second
+)
+
 // PrmDial groups connection parameters for the Client.
 //
 // See also Dial.
 type PrmDial struct {
-	endpoint string
+	Endpoint string
 
-	tlsConfig *tls.Config
+	TLSConfig *tls.Config
 
-	timeoutDialSet bool
+	// If DialTimeout is non-positive, then it's set to defaultDialTimeout.
-	timeoutDial    time.Duration
+	DialTimeout time.Duration
 
-	streamTimeoutSet bool
+	// If StreamTimeout is non-positive, then it's set to defaultStreamTimeout.
-	streamTimeout    time.Duration
+	StreamTimeout time.Duration
 
-	dialOptions []grpc.DialOption
+	GRPCDialOptions []grpc.DialOption
 }
 
 // SetServerURI sets server URI in the FrostFS network.
@@ -205,33 +211,41 @@ type PrmDial struct {
 //	grpcs
 //
 // See also SetTLSConfig.
+//
+// Deprecated: Use PrmDial.Endpoint instead.
 func (x *PrmDial) SetServerURI(endpoint string) {
-	x.endpoint = endpoint
+	x.Endpoint = endpoint
 }
 
 // SetTLSConfig sets tls.Config to open TLS client connection
 // to the FrostFS server. Nil (default) means insecure connection.
 //
 // See also SetServerURI.
+//
+// Depreacted: Use PrmDial.TLSConfig instead.
 func (x *PrmDial) SetTLSConfig(tlsConfig *tls.Config) {
-	x.tlsConfig = tlsConfig
+	x.TLSConfig = tlsConfig
 }
 
 // SetTimeout sets the timeout for connection to be established.
 // MUST BE positive. If not called, 5s timeout will be used by default.
+//
+// Deprecated: Use PrmDial.DialTimeout instead.
 func (x *PrmDial) SetTimeout(timeout time.Duration) {
-	x.timeoutDialSet = true
+	x.DialTimeout = timeout
-	x.timeoutDial = timeout
 }
 
 // SetStreamTimeout sets the timeout for individual operations in streaming RPC.
 // MUST BE positive. If not called, 10s timeout will be used by default.
+//
+// Deprecated: Use PrmDial.StreamTimeout instead.
 func (x *PrmDial) SetStreamTimeout(timeout time.Duration) {
-	x.streamTimeoutSet = true
+	x.StreamTimeout = timeout
-	x.streamTimeout = timeout
 }
 
 // SetGRPCDialOptions sets the gRPC dial options for new gRPC client connection.
+//
+// Deprecated: Use PrmDial.GRPCDialOptions instead.
 func (x *PrmDial) SetGRPCDialOptions(opts ...grpc.DialOption) {
-	x.dialOptions = opts
+	x.GRPCDialOptions = opts
 }

client/client_test.go

@@ -29,8 +29,9 @@ func assertStatusErr(tb testing.TB, res interface{ Status() apistatus.Status })
 }
 
 func newClient(server frostFSAPIServer) *Client {
-	var prm PrmInit
+	prm := PrmInit{
-	prm.SetDefaultPrivateKey(*key)
+		Key: *key,
+	}
 
 	var c Client
 	c.Init(prm)
@@ -43,8 +44,9 @@ func TestClient_DialContext(t *testing.T) {
 	var c Client
 
 	// try to connect to any host
-	var prm PrmDial
+	prm := PrmDial{
-	prm.SetServerURI("localhost:8080")
+		Endpoint: "localhost:8080",
+	}
 
 	assert := func(ctx context.Context, errExpected error) {
 		// expect particular context error according to Dial docs

client/common.go

@@ -24,24 +24,6 @@ func (x statusRes) Status() apistatus.Status {
 	return x.st
 }
 
-// groups meta parameters shared between all Client operations.
-type prmCommonMeta struct {
-	// FrostFS request X-Headers
-	xHeaders []string
-}
-
-// WithXHeaders specifies list of extended headers (string key-value pairs)
-// to be attached to the request. Must have an even length.
-//
-// Slice must not be mutated until the operation completes.
-func (x *prmCommonMeta) WithXHeaders(hs ...string) {
-	if len(hs)%2 != 0 {
-		panic("slice of X-Headers with odd length")
-	}
-
-	x.xHeaders = hs
-}
-
 func writeXHeadersToMeta(xHeaders []string, h *v2session.RequestMetaHeader) {
 	if len(xHeaders) == 0 {
 		return
@@ -68,7 +50,6 @@ var (
 	errorMissingObject        = errors.New("missing object")
 	errorAccountNotSet        = errors.New("account not set")
 	errorServerAddrUnset      = errors.New("server address is unset or empty")
-	errorNonPositiveTimeout   = errors.New("non-positive timeout")
 	errorEACLTableNotSet      = errors.New("eACL table not set")
 	errorMissingAnnouncements = errors.New("missing announcements")
 	errorZeroRangeLength      = errors.New("zero range length")
@@ -96,19 +77,19 @@ func (c *Client) prepareRequest(req request, meta *v2session.RequestMetaHeader)
 
 	meta.SetTTL(ttl)
 	meta.SetVersion(verV2)
-	meta.SetNetworkMagic(c.prm.netMagic)
+	meta.SetNetworkMagic(c.prm.NetMagic)
 
 	req.SetMetaHeader(meta)
 }
 
 // processResponse verifies response signature and converts status to an error if needed.
 func (c *Client) processResponse(resp responseV2) (apistatus.Status, error) {
-	if c.prm.cbRespInfo != nil {
+	if c.prm.ResponseInfoCallback != nil {
 		rmi := ResponseMetaInfo{
 			key:   resp.GetVerificationHeader().GetBodySignature().GetKey(),
 			epoch: resp.GetMetaHeader().GetEpoch(),
 		}
-		if err := c.prm.cbRespInfo(rmi); err != nil {
+		if err := c.prm.ResponseInfoCallback(rmi); err != nil {
 			return nil, fmt.Errorf("response callback error: %w", err)
 		}
 	}
@@ -119,7 +100,7 @@ func (c *Client) processResponse(resp responseV2) (apistatus.Status, error) {
 	}
 
 	st := apistatus.FromStatusV2(resp.GetMetaHeader().GetStatus())
-	if c.prm.resolveFrostFSErrors {
+	if !c.prm.DisableFrostFSErrorResolution {
 		return st, apistatus.ErrFromStatus(st)
 	}
 	return st, nil

client/container_delete.go

@@ -52,7 +52,7 @@ func (prm *PrmContainerDelete) buildRequest(c *Client) (*v2container.DeleteReque
 
 	var sig frostfscrypto.Signature
 
-	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.key), data)
+	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.Key), data)
 	if err != nil {
 		return nil, fmt.Errorf("calculate signature: %w", err)
 	}
@@ -101,9 +101,9 @@ type ResContainerDelete struct {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Operation is asynchronous and no guaranteed even in the absence of errors.
 // The required time is also not predictable.
@@ -124,7 +124,7 @@ func (c *Client) ContainerDelete(ctx context.Context, prm PrmContainerDelete) (*
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/container_eacl.go

@@ -13,6 +13,7 @@ import (
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	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"
 )
 
 // PrmContainerEACL groups parameters of ContainerEACL operation.
@@ -21,6 +22,8 @@ type PrmContainerEACL struct {
 	XHeaders []string
 
 	ContainerID *cid.ID
+
+	Session *session.Container
 }
 
 // SetContainer sets identifier of the FrostFS container to read the eACL table.
@@ -46,9 +49,19 @@ func (x *PrmContainerEACL) buildRequest(c *Client) (*v2container.GetExtendedACLR
 	reqBody := new(v2container.GetExtendedACLRequestBody)
 	reqBody.SetContainerID(&cidV2)
 
+	var meta v2session.RequestMetaHeader
+	writeXHeadersToMeta(x.XHeaders, &meta)
+
+	if x.Session != nil {
+		var tokv2 v2session.Token
+		x.Session.WriteToV2(&tokv2)
+
+		meta.SetSessionToken(&tokv2)
+	}
+
 	var req v2container.GetExtendedACLRequest
 	req.SetBody(reqBody)
-	c.prepareRequest(&req, new(v2session.RequestMetaHeader))
+	c.prepareRequest(&req, &meta)
 	return &req, nil
 }
 
@@ -68,9 +81,9 @@ func (x ResContainerEACL) Table() eacl.Table {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmContainerEACL docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -85,7 +98,7 @@ func (c *Client) ContainerEACL(ctx context.Context, prm PrmContainerEACL) (*ResC
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/container_get.go

@@ -14,6 +14,7 @@ import (
 	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/session"
 )
 
 // PrmContainerGet groups parameters of ContainerGet operation.
@@ -22,6 +23,8 @@ type PrmContainerGet struct {
 	XHeaders []string
 
 	ContainerID *cid.ID
+
+	Session *session.Container
 }
 
 // SetContainer sets identifier of the container to be read.
@@ -47,9 +50,19 @@ func (prm *PrmContainerGet) buildRequest(c *Client) (*v2container.GetRequest, er
 	reqBody := new(v2container.GetRequestBody)
 	reqBody.SetContainerID(&cidV2)
 
+	var meta v2session.RequestMetaHeader
+	writeXHeadersToMeta(prm.XHeaders, &meta)
+
+	if prm.Session != nil {
+		var tokv2 v2session.Token
+		prm.Session.WriteToV2(&tokv2)
+
+		meta.SetSessionToken(&tokv2)
+	}
+
 	var req v2container.GetRequest
 	req.SetBody(reqBody)
-	c.prepareRequest(&req, new(v2session.RequestMetaHeader))
+	c.prepareRequest(&req, &meta)
 	return &req, nil
 }
 
@@ -71,9 +84,9 @@ func (x ResContainerGet) Container() container.Container {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmContainerGet docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -87,7 +100,7 @@ func (c *Client) ContainerGet(ctx context.Context, prm PrmContainerGet) (*ResCon
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/container_list.go

@@ -12,38 +12,51 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 )
 
 // PrmContainerList groups parameters of ContainerList operation.
 type PrmContainerList struct {
-	prmCommonMeta
+	XHeaders []string
 
-	ownerSet bool
+	Account user.ID
-	ownerID  user.ID
+
+	Session *session.Container
 }
 
 // SetAccount sets identifier of the FrostFS account to list the containers.
 // Required parameter.
+//
+// Deprecated: Use PrmContainerList.Account instead.
 func (x *PrmContainerList) SetAccount(id user.ID) {
-	x.ownerID = id
+	x.Account = id
-	x.ownerSet = true
 }
 
 func (x *PrmContainerList) buildRequest(c *Client) (*v2container.ListRequest, error) {
-	if !x.ownerSet {
+	if x.Account.IsEmpty() {
 		return nil, errorAccountNotSet
 	}
 
 	var ownerV2 refs.OwnerID
-	x.ownerID.WriteToV2(&ownerV2)
+	x.Account.WriteToV2(&ownerV2)
 
 	reqBody := new(v2container.ListRequestBody)
 	reqBody.SetOwnerID(&ownerV2)
 
+	var meta v2session.RequestMetaHeader
+	writeXHeadersToMeta(x.XHeaders, &meta)
+
+	if x.Session != nil {
+		var tokv2 v2session.Token
+		x.Session.WriteToV2(&tokv2)
+
+		meta.SetSessionToken(&tokv2)
+	}
+
 	var req v2container.ListRequest
 	req.SetBody(reqBody)
-	c.prepareRequest(&req, new(v2session.RequestMetaHeader))
+	c.prepareRequest(&req, &meta)
 	return &req, nil
 }
 
@@ -65,9 +78,9 @@ func (x ResContainerList) Containers() []cid.ID {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmContainerList docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -80,7 +93,7 @@ func (c *Client) ContainerList(ctx context.Context, prm PrmContainerList) (*ResC
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/container_put.go

@@ -64,7 +64,7 @@ func (x *PrmContainerPut) buildRequest(c *Client) (*v2container.PutRequest, erro
 
 	var sig frostfscrypto.Signature
 
-	err := container.CalculateSignature(&sig, *x.Container, c.prm.key)
+	err := container.CalculateSignature(&sig, *x.Container, c.prm.Key)
 	if err != nil {
 		return nil, fmt.Errorf("calculate container signature: %w", err)
 	}
@@ -110,9 +110,9 @@ func (x ResContainerPut) ID() cid.ID {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Operation is asynchronous and no guaranteed even in the absence of errors.
 // The required time is also not predictable.
@@ -132,7 +132,7 @@ func (c *Client) ContainerPut(ctx context.Context, prm PrmContainerPut) (*ResCon
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/container_set_eacl.go

@@ -64,7 +64,7 @@ func (x *PrmContainerSetEACL) buildRequest(c *Client) (*v2container.SetExtendedA
 
 	var sig frostfscrypto.Signature
 
-	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.key), eaclV2.StableMarshal(nil))
+	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.Key), eaclV2.StableMarshal(nil))
 	if err != nil {
 		return nil, fmt.Errorf("calculate signature: %w", err)
 	}
@@ -101,9 +101,9 @@ type ResContainerSetEACL struct {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Operation is asynchronous and no guaranteed even in the absence of errors.
 // The required time is also not predictable.
@@ -121,7 +121,7 @@ func (c *Client) ContainerSetEACL(ctx context.Context, prm PrmContainerSetEACL)
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/container_space.go

@@ -57,9 +57,9 @@ type ResAnnounceSpace struct {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Operation is asynchronous and no guaranteed even in the absence of errors.
 // The required time is also not predictable.
@@ -77,7 +77,7 @@ func (c *Client) ContainerAnnounceUsedSpace(ctx context.Context, prm PrmAnnounce
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

client/errors_test.go

@@ -33,7 +33,8 @@ func TestErrors(t *testing.T) {
 		{
 			check: client.IsErrSessionExpired,
 			err:   new(apistatus.SessionTokenExpired),
-		}, {
+		},
+		{
 			check: client.IsErrSessionNotFound,
 			err:   new(apistatus.SessionTokenNotFound),
 		},

client/netmap.go

@@ -53,9 +53,9 @@ func (x ResEndpointInfo) NodeInfo() netmap.NodeInfo {
 // Method can be used as a health check to see if node is alive and responds to requests.
 //
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmEndpointInfo docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -71,7 +71,7 @@ func (c *Client) EndpointInfo(ctx context.Context, prm PrmEndpointInfo) (*ResEnd
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
@@ -140,9 +140,9 @@ func (x ResNetworkInfo) Info() netmap.NetworkInfo {
 // NetworkInfo requests information about the FrostFS network of which the remote server is a part.
 //
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmNetworkInfo docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -158,7 +158,7 @@ func (c *Client) NetworkInfo(ctx context.Context, prm PrmNetworkInfo) (*ResNetwo
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
@@ -186,8 +186,7 @@ func (c *Client) NetworkInfo(ctx context.Context, prm PrmNetworkInfo) (*ResNetwo
 }
 
 // PrmNetMapSnapshot groups parameters of NetMapSnapshot operation.
-type PrmNetMapSnapshot struct {
+type PrmNetMapSnapshot struct{}
-}
 
 // ResNetMapSnapshot groups resulting values of NetMapSnapshot operation.
 type ResNetMapSnapshot struct {
@@ -204,9 +203,9 @@ func (x ResNetMapSnapshot) NetMap() netmap.NetMap {
 // NetMapSnapshot requests current network view of the remote server.
 //
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly.
 // Context is required and MUST NOT be nil. It is used for network communication.
@@ -228,7 +227,7 @@ func (c *Client) NetMapSnapshot(ctx context.Context, _ PrmNetMapSnapshot) (*ResN
 	req.SetBody(&body)
 	c.prepareRequest(&req, &meta)
 
-	err := signature.SignServiceMessage(&c.prm.key, &req)
+	err := signature.SignServiceMessage(&c.prm.Key, &req)
 	if err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}

client/netmap_test.go

@@ -67,6 +67,7 @@ func TestClient_NetMapSnapshot(t *testing.T) {
 	var res *ResNetMapSnapshot
 	var srv serverNetMap
 	c := newClient(&srv)
+	c.prm.DisableFrostFSFailuresResolution()
 	ctx := context.Background()
 
 	// request signature

client/object_delete.go

@@ -112,9 +112,9 @@ func (prm *PrmObjectDelete) buildRequest(c *Client) (*v2object.DeleteRequest, er
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`,
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmObjectDelete docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -131,7 +131,7 @@ func (c *Client) ObjectDelete(ctx context.Context, prm PrmObjectDelete) (*ResObj
 		return nil, err
 	}
 
-	key := c.prm.key
+	key := c.prm.Key
 	if prm.Key != nil {
 		key = *prm.Key
 	}

client/object_get.go

@@ -150,6 +150,9 @@ func (x *ObjectReader) ReadHeader(dst *object.Object) bool {
 	case *v2object.SplitInfo:
 		x.err = object.NewSplitInfoError(object.NewSplitInfoFromV2(v))
 		return false
+	case *v2object.ECInfo:
+		x.err = object.NewECInfoError(object.NewECInfoFromV2(v))
+		return false
 	case *v2object.GetObjectPartInit:
 		partInit = v
 	}
@@ -258,6 +261,7 @@ func (x *ObjectReader) close(ignoreEOF bool) (*ResObjectGet, error) {
 // Return errors:
 //
 //	*object.SplitInfoError (returned on virtual objects with PrmObjectGet.MakeRaw).
+//	*object.ECInfoError (returned on erasure-coded objects with PrmObjectGet.MakeRaw).
 //
 // Return statuses:
 //   - global (see Client docs);
@@ -307,7 +311,7 @@ func (c *Client) ObjectGetInit(ctx context.Context, prm PrmObjectGet) (*ObjectRe
 
 	key := prm.Key
 	if key == nil {
-		key = &c.prm.key
+		key = &c.prm.Key
 	}
 
 	err = signature.SignServiceMessage(key, req)
@@ -444,9 +448,9 @@ func (prm *PrmObjectHead) buildRequest(c *Client) (*v2object.HeadRequest, error)
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`,
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmObjectHead docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -454,6 +458,7 @@ func (prm *PrmObjectHead) buildRequest(c *Client) (*v2object.HeadRequest, error)
 // Return errors:
 //
 //	*object.SplitInfoError (returned on virtual objects with PrmObjectHead.MakeRaw).
+//	*object.ECInfoError (returned on erasure-coded objects with PrmObjectHead.MakeRaw).
 //
 // Return statuses:
 //   - global (see Client docs);
@@ -468,7 +473,7 @@ func (c *Client) ObjectHead(ctx context.Context, prm PrmObjectHead) (*ResObjectH
 		return nil, err
 	}
 
-	key := c.prm.key
+	key := c.prm.Key
 	if prm.Key != nil {
 		key = *prm.Key
 	}
@@ -502,6 +507,8 @@ func (c *Client) ObjectHead(ctx context.Context, prm PrmObjectHead) (*ResObjectH
 		return nil, fmt.Errorf("unexpected header type %T", v)
 	case *v2object.SplitInfo:
 		return nil, object.NewSplitInfoError(object.NewSplitInfoFromV2(v))
+	case *v2object.ECInfo:
+		return nil, object.NewECInfoError(object.NewECInfoFromV2(v))
 	case *v2object.HeaderWithSignature:
 		res.hdr = v
 	}
@@ -665,6 +672,9 @@ func (x *ObjectRangeReader) readChunk(buf []byte) (int, bool) {
 		case *v2object.SplitInfo:
 			x.err = object.NewSplitInfoError(object.NewSplitInfoFromV2(v))
 			return read, false
+		case *v2object.ECInfo:
+			x.err = object.NewECInfoError(object.NewECInfoFromV2(v))
+			return read, false
 		case *v2object.GetRangePartChunk:
 			partChunk = v
 		}
@@ -725,6 +735,7 @@ func (x *ObjectRangeReader) close(ignoreEOF bool) (*ResObjectRange, error) {
 // Return errors:
 //
 //	*object.SplitInfoError (returned on virtual objects with PrmObjectRange.MakeRaw).
+//	*object.ECInfoError (returned on erasure-coded objects with PrmObjectRange.MakeRaw).
 //
 // Return statuses:
 //   - global (see Client docs);
@@ -776,7 +787,7 @@ func (c *Client) ObjectRangeInit(ctx context.Context, prm PrmObjectRange) (*Obje
 
 	key := prm.Key
 	if key == nil {
-		key = &c.prm.key
+		key = &c.prm.Key
 	}
 
 	err = signature.SignServiceMessage(key, req)

client/object_hash.go

@@ -152,9 +152,9 @@ func (prm *PrmObjectHash) buildRequest(c *Client) (*v2object.GetRangeHashRequest
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`,
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmObjectHash docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -172,7 +172,7 @@ func (c *Client) ObjectHash(ctx context.Context, prm PrmObjectHash) (*ResObjectH
 		return nil, err
 	}
 
-	key := c.prm.key
+	key := c.prm.Key
 	if prm.Key != nil {
 		key = *prm.Key
 	}

client/object_put.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/ecdsa"
 
+	buffPool "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/pool"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -36,6 +37,8 @@ type PrmObjectPutInit struct {
 	WithoutHomomorphHash bool
 
 	Key *ecdsa.PrivateKey
+
+	Pool *buffPool.BufferPool
 }
 
 // SetCopiesNumber sets number of object copies that is enough to consider put successful.

client/object_put_raw.go

@@ -28,7 +28,7 @@ func (c *Client) objectPutInitRaw(ctx context.Context, prm PrmObjectPutInit) (*o
 		return nil, fmt.Errorf("open stream: %w", err)
 	}
 
-	w.key = &c.prm.key
+	w.key = &c.prm.Key
 	if prm.Key != nil {
 		w.key = prm.Key
 	}

client/object_put_single.go

@@ -142,7 +142,7 @@ func (c *Client) ObjectPutSingle(ctx context.Context, prm PrmObjectPutSingle) (*
 		return nil, err
 	}
 
-	key := &c.prm.key
+	key := &c.prm.Key
 	if prm.Key != nil {
 		key = prm.Key
 	}

client/object_put_transformer.go

@@ -3,6 +3,7 @@ package client
 import (
 	"context"
 
+	buffPool "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/pool"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
@@ -16,7 +17,7 @@ func (c *Client) objectPutInitTransformer(prm PrmObjectPutInit) (*objectWriterTr
 		client: c,
 		prm:    prm,
 	}
-	key := &c.prm.key
+	key := &c.prm.Key
 	if prm.Key != nil {
 		key = prm.Key
 	}
@@ -26,6 +27,7 @@ func (c *Client) objectPutInitTransformer(prm PrmObjectPutInit) (*objectWriterTr
 		MaxSize:                prm.MaxSize,
 		WithoutHomomorphicHash: prm.WithoutHomomorphHash,
 		NetworkState:           prm.EpochSource,
+		Pool:                   prm.Pool,
 	})
 	return &w, nil
 }
@@ -47,6 +49,10 @@ func (x *objectWriterTransformer) WritePayloadChunk(ctx context.Context, chunk [
 }
 
 func (x *objectWriterTransformer) Close(ctx context.Context) (*ResObjectPut, error) {
+	if x.err != nil {
+		return nil, x.err
+	}
+
 	ai, err := x.ot.Close(ctx)
 	if err != nil {
 		return nil, err
@@ -83,7 +89,7 @@ func (it *internalTarget) putAsStream(ctx context.Context, o *object.Object) err
 		wrt.WritePayloadChunk(ctx, o.Payload())
 	}
 	it.res, err = wrt.Close(ctx)
-	if err == nil && !it.client.prm.resolveFrostFSErrors && !apistatus.IsSuccessful(it.res.st) {
+	if err == nil && it.client.prm.DisableFrostFSErrorResolution && !apistatus.IsSuccessful(it.res.st) {
 		err = apistatus.ErrFromStatus(it.res.st)
 	}
 	return err
@@ -110,15 +116,25 @@ func (it *internalTarget) tryPutSingle(ctx context.Context, o *object.Object) (b
 	}
 
 	if err == nil {
+		it.returnBuffPool(o.Payload())
 		id, _ := o.ID()
 		it.res = &ResObjectPut{
 			statusRes: res.statusRes,
 			obj:       id,
 		}
-		if !it.client.prm.resolveFrostFSErrors && !apistatus.IsSuccessful(it.res.st) {
+		if it.client.prm.DisableFrostFSErrorResolution && !apistatus.IsSuccessful(it.res.st) {
 			return true, apistatus.ErrFromStatus(it.res.st)
 		}
 		return true, nil
 	}
 	return true, err
 }
+
+func (it *internalTarget) returnBuffPool(playback []byte) {
+	if it.prm.Pool == nil {
+		return
+	}
+	var buffer buffPool.Buffer
+	buffer.Data = playback
+	it.prm.Pool.Put(&buffer)
+}

client/object_search.go

@@ -24,19 +24,26 @@ import (
 
 // PrmObjectSearch groups parameters of ObjectSearch operation.
 type PrmObjectSearch struct {
-	meta v2session.RequestMetaHeader
+	XHeaders []string
 
-	key *ecdsa.PrivateKey
+	Local bool
 
-	cnrSet bool
+	BearerToken *bearer.Token
-	cnrID  cid.ID
 
-	filters object.SearchFilters
+	Session *session.Object
+
+	ContainerID *cid.ID
+
+	Key *ecdsa.PrivateKey
+
+	Filters object.SearchFilters
 }
 
 // MarkLocal tells the server to execute the operation locally.
+//
+// Deprecated: Use PrmObjectSearch.Local instead.
 func (x *PrmObjectSearch) MarkLocal() {
-	x.meta.SetTTL(1)
+	x.Local = true
 }
 
 // WithinSession specifies session within which the search query must be executed.
@@ -45,10 +52,10 @@ func (x *PrmObjectSearch) MarkLocal() {
 // This may affect the execution of an operation (e.g. access control).
 //
 // Must be signed.
+//
+// Deprecated: Use PrmObjectSearch.Session instead.
 func (x *PrmObjectSearch) WithinSession(t session.Object) {
-	var tokv2 v2session.Token
+	x.Session = &t
-	t.WriteToV2(&tokv2)
-	x.meta.SetSessionToken(&tokv2)
 }
 
 // WithBearerToken attaches bearer token to be used for the operation.
@@ -56,37 +63,44 @@ func (x *PrmObjectSearch) WithinSession(t session.Object) {
 // If set, underlying eACL rules will be used in access control.
 //
 // Must be signed.
+//
+// Deprecated: Use PrmObjectSearch.BearerToken instead.
 func (x *PrmObjectSearch) WithBearerToken(t bearer.Token) {
-	var v2token acl.BearerToken
+	x.BearerToken = &t
-	t.WriteToV2(&v2token)
-	x.meta.SetBearerToken(&v2token)
 }
 
 // WithXHeaders specifies list of extended headers (string key-value pairs)
 // to be attached to the request. Must have an even length.
 //
 // Slice must not be mutated until the operation completes.
+//
+// Deprecated: Use PrmObjectSearch.XHeaders instead.
 func (x *PrmObjectSearch) WithXHeaders(hs ...string) {
-	writeXHeadersToMeta(hs, &x.meta)
+	x.XHeaders = hs
 }
 
 // UseKey specifies private key to sign the requests.
 // If key is not provided, then Client default key is used.
+//
+// Deprecated: Use PrmObjectSearch.Key instead.
 func (x *PrmObjectSearch) UseKey(key ecdsa.PrivateKey) {
-	x.key = &key
+	x.Key = &key
 }
 
 // InContainer specifies the container in which to look for objects.
 // Required parameter.
+//
+// Deprecated: Use PrmObjectSearch.ContainerID instead.
 func (x *PrmObjectSearch) InContainer(id cid.ID) {
-	x.cnrID = id
+	x.ContainerID = &id
-	x.cnrSet = true
 }
 
 // SetFilters sets filters by which to select objects. All container objects
 // match unset/empty filters.
+//
+// Deprecated: Use PrmObjectSearch.Filters instead.
 func (x *PrmObjectSearch) SetFilters(filters object.SearchFilters) {
-	x.filters = filters
+	x.Filters = filters
 }
 
 // ResObjectSearch groups the final result values of ObjectSearch operation.
@@ -212,6 +226,48 @@ func (x *ObjectListReader) Close() (*ResObjectSearch, error) {
 	return &x.res, nil
 }
 
+func (x *PrmObjectSearch) buildRequest(c *Client) (*v2object.SearchRequest, error) {
+	if x.ContainerID == nil {
+		return nil, errorMissingContainer
+	}
+
+	if len(x.XHeaders)%2 != 0 {
+		return nil, errorInvalidXHeaders
+	}
+
+	meta := new(v2session.RequestMetaHeader)
+	writeXHeadersToMeta(x.XHeaders, meta)
+
+	if x.BearerToken != nil {
+		v2BearerToken := new(acl.BearerToken)
+		x.BearerToken.WriteToV2(v2BearerToken)
+		meta.SetBearerToken(v2BearerToken)
+	}
+
+	if x.Session != nil {
+		v2SessionToken := new(v2session.Token)
+		x.Session.WriteToV2(v2SessionToken)
+		meta.SetSessionToken(v2SessionToken)
+	}
+
+	if x.Local {
+		meta.SetTTL(1)
+	}
+	cnrV2 := new(v2refs.ContainerID)
+	x.ContainerID.WriteToV2(cnrV2)
+
+	body := new(v2object.SearchRequestBody)
+	body.SetVersion(1)
+	body.SetContainerID(cnrV2)
+	body.SetFilters(x.Filters.ToV2())
+
+	req := new(v2object.SearchRequest)
+	req.SetBody(body)
+	c.prepareRequest(req, meta)
+
+	return req, nil
+}
+
 // ObjectSearchInit initiates object selection through a remote server using FrostFS API protocol.
 //
 // The call only opens the transmission channel, explicit fetching of matched objects
@@ -221,30 +277,17 @@ func (x *ObjectListReader) Close() (*ResObjectSearch, error) {
 // Returns an error if parameters are set incorrectly (see PrmObjectSearch docs).
 // Context is required and must not be nil. It is used for network communication.
 func (c *Client) ObjectSearchInit(ctx context.Context, prm PrmObjectSearch) (*ObjectListReader, error) {
-	// check parameters
+	req, err := prm.buildRequest(c)
-	if !prm.cnrSet {
+	if err != nil {
-		return nil, errorMissingContainer
+		return nil, err
 	}
 
-	var cidV2 v2refs.ContainerID
+	key := prm.Key
-	prm.cnrID.WriteToV2(&cidV2)
-
-	var body v2object.SearchRequestBody
-	body.SetVersion(1)
-	body.SetContainerID(&cidV2)
-	body.SetFilters(prm.filters.ToV2())
-
-	// init reader
-	var req v2object.SearchRequest
-	req.SetBody(&body)
-	c.prepareRequest(&req, &prm.meta)
-
-	key := prm.key
 	if key == nil {
-		key = &c.prm.key
+		key = &c.prm.Key
 	}
 
-	err := signature.SignServiceMessage(key, &req)
+	err = signature.SignServiceMessage(key, req)
 	if err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
@@ -252,7 +295,7 @@ func (c *Client) ObjectSearchInit(ctx context.Context, prm PrmObjectSearch) (*Ob
 	var r ObjectListReader
 	ctx, r.cancelCtxStream = context.WithCancel(ctx)
 
-	r.stream, err = rpcapi.SearchObjects(&c.c, &req, client.WithContext(ctx))
+	r.stream, err = rpcapi.SearchObjects(&c.c, req, client.WithContext(ctx))
 	if err != nil {
 		return nil, fmt.Errorf("open stream: %w", err)
 	}

client/session.go

@@ -39,7 +39,7 @@ func (x *PrmSessionCreate) UseKey(key ecdsa.PrivateKey) {
 }
 
 func (x *PrmSessionCreate) buildRequest(c *Client) (*v2session.CreateRequest, error) {
-	ownerKey := c.prm.key.PublicKey
+	ownerKey := c.prm.Key.PublicKey
 	if x.Key != nil {
 		ownerKey = x.Key.PublicKey
 	}
@@ -89,9 +89,9 @@ func (x ResSessionCreate) PublicKey() []byte {
 //
 // Exactly one return value is non-nil. By default, server status is returned in res structure.
 // Any client's internal or transport errors are returned as `error`.
-// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
+// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
-// FrostFS status codes are returned as `error`, otherwise, are included
+// FrostFS status codes are included in the returned result structure,
-// in the returned result structure.
+// otherwise, are also returned as `error`.
 //
 // Returns an error if parameters are set incorrectly (see PrmSessionCreate docs).
 // Context is required and must not be nil. It is used for network communication.
@@ -104,7 +104,7 @@ func (c *Client) SessionCreate(ctx context.Context, prm PrmSessionCreate) (*ResS
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 

container/container.go

@@ -355,7 +355,7 @@ func (x Container) IterateAttributes(f func(key, val string)) {
 func (x Container) IterateUserAttributes(f func(key, val string)) {
 	attrs := x.v2.GetAttributes()
 	for _, attr := range attrs {
-		var key = attr.GetKey()
+		key := attr.GetKey()
 		if !strings.HasPrefix(key, container.SysAttributePrefix) &&
 			!strings.HasPrefix(key, container.SysAttributePrefixNeoFS) {
 			f(key, attr.GetValue())

container/container_test.go

@@ -78,7 +78,7 @@ func TestContainer_Owner(t *testing.T) {
 
 	val = containertest.Container()
 
-	owner := *usertest.ID()
+	owner := usertest.ID()
 
 	val.SetOwner(owner)
 

container/test/generate.go

@@ -16,7 +16,7 @@ func Container() (x container.Container) {
 
 	x.Init()
 	x.SetAttribute("some attribute", "value")
-	x.SetOwner(*owner)
+	x.SetOwner(owner)
 	x.SetBasicACL(BasicACL())
 	x.SetPlacementPolicy(netmaptest.PlacementPolicy())
 

eacl/record.go

@@ -125,7 +125,7 @@ func (r *Record) AddObjectContainerIDFilter(m Match, id cid.ID) {
 }
 
 // AddObjectOwnerIDFilter adds filter by object owner ID.
-func (r *Record) AddObjectOwnerIDFilter(m Match, id *user.ID) {
+func (r *Record) AddObjectOwnerIDFilter(m Match, id user.ID) {
 	r.addObjectReservedFilter(m, fKeyObjOwnerID, id)
 }
 

eacl/record_test.go

@@ -225,14 +225,6 @@ func TestReservedRecords(t *testing.T) {
 			key:   v2acl.FilterObjectType,
 			value: "TOMBSTONE",
 		},
-		{
-			f: func(r *Record) {
-				require.True(t, typ.FromString("STORAGE_GROUP"))
-				r.AddObjectTypeFilter(MatchStringEqual, *typ)
-			},
-			key:   v2acl.FilterObjectType,
-			value: "STORAGE_GROUP",
-		},
 	}
 
 	for n, testCase := range testSuit {

eacl/validator.go

@@ -7,8 +7,7 @@ import (
 // Validator is a tool that calculates
 // the action on a request according
 // to the extended ACL rule table.
-type Validator struct {
+type Validator struct{}
-}
 
 // NewValidator creates and initializes a new Validator using options.
 func NewValidator() *Validator {

go.mod

@@ -2,8 +2,10 @@ module git.frostfs.info/TrueCloudLab/frostfs-sdk-go
 
 go 1.20
 
+replace git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20240427200446-67c6f305b21f => git.frostfs.info/aarifullin/frostfs-api-go/v2 v2.15.1-0.20240503124453-87caff9c8df0
+
 require (
-	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230802075510-964c3edb3f44
+	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20240427200446-67c6f305b21f
 	git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb
 	git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0
 	git.frostfs.info/TrueCloudLab/hrw v1.2.1
@@ -11,12 +13,14 @@ require (
 	github.com/antlr4-go/antlr/v4 v4.13.0
 	github.com/google/uuid v1.3.0
 	github.com/hashicorp/golang-lru/v2 v2.0.2
+	github.com/klauspost/reedsolomon v1.12.1
 	github.com/mr-tron/base58 v1.2.0
 	github.com/nspcc-dev/neo-go v0.101.2-0.20230601131642-a0117042e8fc
 	github.com/stretchr/testify v1.8.3
 	go.uber.org/zap v1.24.0
 	google.golang.org/grpc v1.55.0
-	google.golang.org/protobuf v1.30.0
+	google.golang.org/protobuf v1.33.0
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
@@ -27,6 +31,7 @@ require (
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
 	github.com/hashicorp/golang-lru v0.6.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
 	github.com/nspcc-dev/go-ordered-json v0.0.0-20220111165707-25110be27d22 // indirect
 	github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20230615193820-9185820289ce // indirect
 	github.com/nspcc-dev/rfc6979 v0.2.0 // indirect
@@ -42,5 +47,4 @@ require (
 	golang.org/x/sys v0.8.0 // indirect
 	golang.org/x/text v0.9.0 // indirect
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -31,8 +31,6 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230802075510-964c3edb3f44 h1:v6JqBD/VzZx3QSxbaXnUwnnJ1KEYheU4LzLGr3IhsAE=
-git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230802075510-964c3edb3f44/go.mod h1:pKJJRLOChW4zDQsAt1e8k/snWKljJtpkiPfxV53ngjI=
 git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb h1:S/TrbOOu9qEXZRZ9/Ddw7crnxbBUQLo68PSzQWYrc9M=
 git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb/go.mod h1:nkR5gaGeez3Zv2SE7aceP0YwxG2FzIB5cGKpQO2vV2o=
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 h1:FxqFDhQYYgpe41qsIHVOcdzSVCB8JNSfPG7Uk4r2oSk=
@@ -43,6 +41,8 @@ git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0 h1:M2KR3iBj7WpY3hP10IevfIB9MURr4O9m
 git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0/go.mod h1:okpbKfVYf/BpejtfFTfhZqFP+sZ8rsHrP8Rr/jYPNRc=
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0 h1:UFMnUIk0Zh17m8rjGHJMqku2hCgaXDqjqZzS4gsb4UA=
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0/go.mod h1:dhY+oy274hV8wGvGL4MwwMpdL3GYvaX1a8GQZQHvlF8=
+git.frostfs.info/aarifullin/frostfs-api-go/v2 v2.15.1-0.20240503124453-87caff9c8df0 h1:20DrUE/PcqDbEbW4EIoE4qi+Dm9Il4tE0RoHitYiIB8=
+git.frostfs.info/aarifullin/frostfs-api-go/v2 v2.15.1-0.20240503124453-87caff9c8df0/go.mod h1:OBDSr+DqV1z4VDouoX3YMleNc4DPBVBWTG3WDT2PK1o=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/CityOfZion/neo-go v0.62.1-pre.0.20191114145240-e740fbe708f8/go.mod h1:MJCkWUBhi9pn/CrYO1Q3P687y2KeahrOPS9BD9LDGb0=
@@ -227,6 +227,10 @@ github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
+github.com/klauspost/cpuid/v2 v2.2.6 h1:ndNyv040zDGIDh8thGkXYjnFtiN02M1PVVF+JE/48xc=
+github.com/klauspost/cpuid/v2 v2.2.6/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
+github.com/klauspost/reedsolomon v1.12.1 h1:NhWgum1efX1x58daOBGCFWcxtEhOhXKKl1HAPQUp03Q=
+github.com/klauspost/reedsolomon v1.12.1/go.mod h1:nEi5Kjb6QqtbofI6s+cbG/j1da11c96IBYBSnVGtuBs=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
@@ -548,6 +552,7 @@ golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
@@ -698,8 +703,8 @@ google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp0
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
-google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/abiosoft/ishell.v2 v2.0.0/go.mod h1:sFp+cGtH6o4s1FtpVPTMcHq2yue+c4DGOVohJCPUzwY=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

netmap/aggregator.go

@@ -156,11 +156,7 @@ func (a *meanIQRAgg) Compute() float64 {
 }
 
 func (r *reverseMinNorm) Normalize(w float64) float64 {
-	if w == 0 {
+	return (r.min + 1) / (w + 1)
-		return 0
-	}
-
-	return r.min / w
 }
 
 func (r *sigmoidNorm) Normalize(w float64) float64 {

netmap/bench_test.go

@@ -53,7 +53,6 @@ func BenchmarkNetmap_ContainerNodes(b *testing.B) {
 					b.Fatal(err)
 				}
 			}
-
 		})
 	}
 }

netmap/json_tests/cbf_default.json

@@ -1,99 +0,0 @@
-{
-  "name": "default CBF is 3",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "St.Petersburg"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "DE"
-        },
-        {
-          "key": "City",
-          "value": "Berlin"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "FR"
-        },
-        {
-          "key": "City",
-          "value": "Paris"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "set default CBF": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "EU"
-          }
-        ],
-        "containerBackupFactor": 0,
-        "selectors": [
-          {
-            "name": "EU",
-            "count": 1,
-            "clause": "SAME",
-            "attribute": "Location",
-            "filter": "*"
-          }
-        ],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/cbf_minimal.json

@@ -1,99 +0,0 @@
-{
-  "name": "Real node count multiplier is in range [1, specified CBF]",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "1"
-        },
-        {
-          "key": "Country",
-          "value": "DE"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "2"
-        },
-        {
-          "key": "Country",
-          "value": "DE"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "3"
-        },
-        {
-          "key": "Country",
-          "value": "DE"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "select 2, CBF is 2": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "X"
-          }
-        ],
-        "containerBackupFactor": 2,
-        "selectors": [
-          {
-            "name": "X",
-            "count": 2,
-            "clause": "SAME",
-            "attribute": "Country",
-            "filter": "*"
-          }
-        ],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2
-        ]
-      ]
-    },
-    "select 3, CBF is 2": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "X"
-          }
-        ],
-        "containerBackupFactor": 2,
-        "selectors": [
-          {
-            "name": "X",
-            "count": 3,
-            "clause": "SAME",
-            "attribute": "Country",
-            "filter": "*"
-          }
-        ],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/cbf_requirements.json

@@ -1,155 +0,0 @@
-{
-  "name": "CBF requirements",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "1"
-        },
-        {
-          "key": "Attr",
-          "value": "Same"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "2"
-        },
-        {
-          "key": "Attr",
-          "value": "Same"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "3"
-        },
-        {
-          "key": "Attr",
-          "value": "Same"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "4"
-        },
-        {
-          "key": "Attr",
-          "value": "Same"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "default CBF, no selector": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 2,
-            "selector": ""
-          }
-        ],
-        "containerBackupFactor": 0,
-        "selectors": [],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          2,
-          1,
-          3
-        ]
-      ]
-    },
-    "explicit CBF, no selector": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 2,
-            "selector": ""
-          }
-        ],
-        "containerBackupFactor": 3,
-        "selectors": [],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          2,
-          1,
-          3
-        ]
-      ]
-    },
-    "select distinct, weak CBF": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 2,
-            "selector": "X"
-          }
-        ],
-        "containerBackupFactor": 3,
-        "selectors": [
-          {
-            "name": "X",
-            "count": 2,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "*"
-          }
-        ],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          2,
-          1,
-          3
-        ]
-      ]
-    },
-    "select same, weak CBF": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 2,
-            "selector": "X"
-          }
-        ],
-        "containerBackupFactor": 3,
-        "selectors": [
-          {
-            "name": "X",
-            "count": 2,
-            "clause": "SAME",
-            "attribute": "Attr",
-            "filter": "*"
-          }
-        ],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2,
-          3
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/filter_complex.json

@@ -1,383 +0,0 @@
-{
-  "name": "compound filter",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Storage",
-          "value": "SSD"
-        },
-        {
-          "key": "Rating",
-          "value": "10"
-        },
-        {
-          "key": "IntField",
-          "value": "100"
-        },
-        {
-          "key": "Param",
-          "value": "Value1"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "good": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "StorageSSD",
-            "key": "Storage",
-            "op": "EQ",
-            "value": "SSD",
-            "filters": []
-          },
-          {
-            "name": "GoodRating",
-            "key": "Rating",
-            "op": "GE",
-            "value": "4",
-            "filters": []
-          },
-          {
-            "name": "Main",
-            "key": "",
-            "op": "AND",
-            "value": "",
-            "filters": [
-              {
-                "name": "StorageSSD",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "IntField",
-                "op": "LT",
-                "value": "123",
-                "filters": []
-              },
-              {
-                "name": "GoodRating",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "",
-                "op": "OR",
-                "value": "",
-                "filters": [
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value1",
-                    "filters": []
-                  },
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value2",
-                    "filters": []
-                  }
-                ]
-              }
-            ]
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "bad storage type": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "StorageSSD",
-            "key": "Storage",
-            "op": "EQ",
-            "value": "HDD",
-            "filters": []
-          },
-          {
-            "name": "GoodRating",
-            "key": "Rating",
-            "op": "GE",
-            "value": "4",
-            "filters": []
-          },
-          {
-            "name": "Main",
-            "key": "",
-            "op": "AND",
-            "value": "",
-            "filters": [
-              {
-                "name": "StorageSSD",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "IntField",
-                "op": "LT",
-                "value": "123",
-                "filters": []
-              },
-              {
-                "name": "GoodRating",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "",
-                "op": "OR",
-                "value": "",
-                "filters": [
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value1",
-                    "filters": []
-                  },
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value2",
-                    "filters": []
-                  }
-                ]
-              }
-            ]
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "bad rating": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "StorageSSD",
-            "key": "Storage",
-            "op": "EQ",
-            "value": "SSD",
-            "filters": []
-          },
-          {
-            "name": "GoodRating",
-            "key": "Rating",
-            "op": "GE",
-            "value": "15",
-            "filters": []
-          },
-          {
-            "name": "Main",
-            "key": "",
-            "op": "AND",
-            "value": "",
-            "filters": [
-              {
-                "name": "StorageSSD",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "IntField",
-                "op": "LT",
-                "value": "123",
-                "filters": []
-              },
-              {
-                "name": "GoodRating",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "",
-                "op": "OR",
-                "value": "",
-                "filters": [
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value1",
-                    "filters": []
-                  },
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value2",
-                    "filters": []
-                  }
-                ]
-              }
-            ]
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "bad param": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "StorageSSD",
-            "key": "Storage",
-            "op": "EQ",
-            "value": "SSD",
-            "filters": []
-          },
-          {
-            "name": "GoodRating",
-            "key": "Rating",
-            "op": "GE",
-            "value": "4",
-            "filters": []
-          },
-          {
-            "name": "Main",
-            "key": "",
-            "op": "AND",
-            "value": "",
-            "filters": [
-              {
-                "name": "StorageSSD",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "IntField",
-                "op": "LT",
-                "value": "123",
-                "filters": []
-              },
-              {
-                "name": "GoodRating",
-                "key": "",
-                "op": "OPERATION_UNSPECIFIED",
-                "value": "",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "",
-                "op": "OR",
-                "value": "",
-                "filters": [
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value0",
-                    "filters": []
-                  },
-                  {
-                    "name": "",
-                    "key": "Param",
-                    "op": "EQ",
-                    "value": "Value2",
-                    "filters": []
-                  }
-                ]
-              }
-            ]
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    }
-  }
-}

netmap/json_tests/filter_invalid_integer.json

@@ -1,83 +0,0 @@
-{
-  "name": "invalid integer field",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "IntegerField",
-          "value": "true"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "IntegerField",
-          "value": "str"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "empty string is not casted to 0": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "IntegerField",
-            "op": "LE",
-            "value": "8",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "non-empty string is not casted to a number": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "IntegerField",
-            "op": "GE",
-            "value": "0",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    }
-  }
-}

netmap/json_tests/filter_simple.json

@@ -1,403 +0,0 @@
-{
-  "name": "single-op filters",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Rating",
-          "value": "4"
-        },
-        {
-          "key": "Country",
-          "value": "Germany"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "GE true": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "GE",
-            "value": "4",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "GE false": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "GE",
-            "value": "5",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "GT true": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "GT",
-            "value": "3",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "GT false": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "GT",
-            "value": "4",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "LE true": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "LE",
-            "value": "4",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "LE false": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "LE",
-            "value": "3",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "LT true": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "LT",
-            "value": "5",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "LT false": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Rating",
-            "op": "LT",
-            "value": "4",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "EQ true": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Country",
-            "op": "EQ",
-            "value": "Germany",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "EQ false": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Country",
-            "op": "EQ",
-            "value": "China",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    },
-    "NE true": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Country",
-            "op": "NE",
-            "value": "France",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "NE false": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "S"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "S",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "Main"
-          }
-        ],
-        "filters": [
-          {
-            "name": "Main",
-            "key": "Country",
-            "op": "NE",
-            "value": "Germany",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    }
-  }
-}

netmap/json_tests/hrw_sort.json

@@ -1,165 +0,0 @@
-{
-  "name": "HRW ordering",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        },
-        {
-          "key": "Price",
-          "value": "2"
-        },
-        {
-          "key": "Capacity",
-          "value": "10000"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        },
-        {
-          "key": "Price",
-          "value": "4"
-        },
-        {
-          "key": "Capacity",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "France"
-        },
-        {
-          "key": "Price",
-          "value": "3"
-        },
-        {
-          "key": "Capacity",
-          "value": "10"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Price",
-          "value": "2"
-        },
-        {
-          "key": "Capacity",
-          "value": "10000"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Price",
-          "value": "1"
-        },
-        {
-          "key": "Capacity",
-          "value": "10000"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Capacity",
-          "value": "10000"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "France"
-        },
-        {
-          "key": "Price",
-          "value": "100"
-        },
-        {
-          "key": "Capacity",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "France"
-        },
-        {
-          "key": "Price",
-          "value": "7"
-        },
-        {
-          "key": "Capacity",
-          "value": "10000"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Price",
-          "value": "2"
-        },
-        {
-          "key": "Capacity",
-          "value": "1"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "select 3 nodes in 3 distinct countries, same placement": {
-      "policy": {"replicas":[{"count":1,"selector":"Main"}],"containerBackupFactor":1,"selectors":[{"name":"Main","count":3,"clause":"DISTINCT","attribute":"Country","filter":"*"}],"filters":[]},
-      "pivot": "Y29udGFpbmVySUQ=",
-      "result": [[0, 2, 3]],
-      "placement": {
-        "pivot": "b2JqZWN0SUQ=",
-        "result": [[0, 2, 3]]
-      }
-    },
-    "select 6 nodes in 3 distinct countries, different placement": {
-      "policy": {"replicas":[{"count":1,"selector":"Main"}],"containerBackupFactor":2,"selectors":[{"name":"Main","count":3,"clause":"DISTINCT","attribute":"Country","filter":"*"}],"filters":[]},
-      "pivot": "Y29udGFpbmVySUQ=",
-      "result": [[0, 1, 2, 6, 3, 4]],
-      "placement": {
-        "pivot": "b2JqZWN0SUQ=",
-        "result": [[0, 1, 2, 6, 3, 4]]
-      }
-    }
-  }
-}

netmap/json_tests/issue213.json

@@ -1,108 +0,0 @@
-{
-  "name": "unnamed selector (nspcc-dev/neofs-api-go#213)",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "City",
-          "value": "Saint-Petersburg"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "Sweden"
-        },
-        {
-          "key": "City",
-          "value": "Stockholm"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Location",
-          "value": "Europe"
-        },
-        {
-          "key": "Country",
-          "value": "Finalnd"
-        },
-        {
-          "key": "City",
-          "value": "Helsinki"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "test": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 4,
-            "selector": ""
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "",
-            "count": 4,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "LOC_EU"
-          }
-        ],
-        "filters": [
-          {
-            "name": "LOC_EU",
-            "key": "Location",
-            "op": "EQ",
-            "value": "Europe",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0,
-          1,
-          2,
-          3
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/many_selects.json

@@ -1,192 +0,0 @@
-{
-  "name": "single-op filters",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Rating",
-          "value": "1"
-        },
-        {
-          "key": "City",
-          "value": "SPB"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        },
-        {
-          "key": "Rating",
-          "value": "5"
-        },
-        {
-          "key": "City",
-          "value": "Berlin"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Rating",
-          "value": "6"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "France"
-        },
-        {
-          "key": "Rating",
-          "value": "4"
-        },
-        {
-          "key": "City",
-          "value": "Paris"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "France"
-        },
-        {
-          "key": "Rating",
-          "value": "1"
-        },
-        {
-          "key": "City",
-          "value": "Lyon"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Rating",
-          "value": "5"
-        },
-        {
-          "key": "City",
-          "value": "SPB"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Rating",
-          "value": "7"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        },
-        {
-          "key": "Rating",
-          "value": "3"
-        },
-        {
-          "key": "City",
-          "value": "Darmstadt"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        },
-        {
-          "key": "Rating",
-          "value": "7"
-        },
-        {
-          "key": "City",
-          "value": "Frankfurt"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Rating",
-          "value": "9"
-        },
-        {
-          "key": "City",
-          "value": "SPB"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        },
-        {
-          "key": "Rating",
-          "value": "9"
-        },
-        {
-          "key": "City",
-          "value": "SPB"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "Select": {
-      "policy": {"replicas":[{"count":1,"selector":"SameRU"},{"count":1,"selector":"DistinctRU"},{"count":1,"selector":"Good"},{"count":1,"selector":"Main"}],"containerBackupFactor":2,"selectors":[{"name":"SameRU","count":2,"clause":"SAME","attribute":"City","filter":"FromRU"},{"name":"DistinctRU","count":2,"clause":"DISTINCT","attribute":"City","filter":"FromRU"},{"name":"Good","count":2,"clause":"DISTINCT","attribute":"Country","filter":"Good"},{"name":"Main","count":3,"clause":"DISTINCT","attribute":"Country","filter":"*"}],"filters":[{"name":"FromRU","key":"Country","op":"EQ","value":"Russia"},{"name":"Good","key":"Rating","op":"GE","value":"4"}]},
-      "result": [
-        [0, 5, 9, 10],
-        [2, 6, 0, 5],
-        [1, 8, 2, 5],
-        [3, 4, 1, 7, 0, 2]
-      ]
-    }
-  }
-}

netmap/json_tests/multiple_rep.json

@@ -1,94 +0,0 @@
-{
-  "name": "multiple replicas (#215)",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Saint-Petersburg"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Moscow"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Berlin"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Paris"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "test": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "LOC_SPB_PLACE"
-          },
-          {
-            "count": 1,
-            "selector": "LOC_MSK_PLACE"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "LOC_SPB_PLACE",
-            "count": 1,
-            "clause": "CLAUSE_UNSPECIFIED",
-            "attribute": "",
-            "filter": "LOC_SPB"
-          },
-          {
-            "name": "LOC_MSK_PLACE",
-            "count": 1,
-            "clause": "CLAUSE_UNSPECIFIED",
-            "attribute": "",
-            "filter": "LOC_MSK"
-          }
-        ],
-        "filters": [
-          {
-            "name": "LOC_SPB",
-            "key": "City",
-            "op": "EQ",
-            "value": "Saint-Petersburg",
-            "filters": []
-          },
-          {
-            "name": "LOC_MSK",
-            "key": "City",
-            "op": "EQ",
-            "value": "Moscow",
-            "filters": []
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ],
-        [
-          1
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/multiple_rep_asymmetric.json

@@ -1,331 +0,0 @@
-{
-  "name": "multiple REP, asymmetric",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "1"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "St.Petersburg"
-        },
-        {
-          "key": "SSD",
-          "value": "0"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "2"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "St.Petersburg"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "3"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "4"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "5"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "St.Petersburg"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "6"
-        },
-        {
-          "key": "Continent",
-          "value": "NA"
-        },
-        {
-          "key": "City",
-          "value": "NewYork"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "7"
-        },
-        {
-          "key": "Continent",
-          "value": "AF"
-        },
-        {
-          "key": "City",
-          "value": "Cairo"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "8"
-        },
-        {
-          "key": "Continent",
-          "value": "AF"
-        },
-        {
-          "key": "City",
-          "value": "Cairo"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "9"
-        },
-        {
-          "key": "Continent",
-          "value": "SA"
-        },
-        {
-          "key": "City",
-          "value": "Lima"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "10"
-        },
-        {
-          "key": "Continent",
-          "value": "AF"
-        },
-        {
-          "key": "City",
-          "value": "Cairo"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "11"
-        },
-        {
-          "key": "Continent",
-          "value": "NA"
-        },
-        {
-          "key": "City",
-          "value": "NewYork"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "12"
-        },
-        {
-          "key": "Continent",
-          "value": "NA"
-        },
-        {
-          "key": "City",
-          "value": "LosAngeles"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "13"
-        },
-        {
-          "key": "Continent",
-          "value": "SA"
-        },
-        {
-          "key": "City",
-          "value": "Lima"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "test": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "SPB"
-          },
-          {
-            "count": 2,
-            "selector": "Americas"
-          }
-        ],
-        "containerBackupFactor": 2,
-        "selectors": [
-          {
-            "name": "SPB",
-            "count": 1,
-            "clause": "SAME",
-            "attribute": "City",
-            "filter": "SPBSSD"
-          },
-          {
-            "name": "Americas",
-            "count": 2,
-            "clause": "DISTINCT",
-            "attribute": "City",
-            "filter": "Americas"
-          }
-        ],
-        "filters": [
-          {
-            "name": "SPBSSD",
-            "key": "",
-            "op": "AND",
-            "value": "",
-            "filters": [
-              {
-                "name": "",
-                "key": "Country",
-                "op": "EQ",
-                "value": "RU",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "City",
-                "op": "EQ",
-                "value": "St.Petersburg",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "SSD",
-                "op": "EQ",
-                "value": "1",
-                "filters": []
-              }
-            ]
-          },
-          {
-            "name": "Americas",
-            "key": "",
-            "op": "OR",
-            "value": "",
-            "filters": [
-              {
-                "name": "",
-                "key": "Continent",
-                "op": "EQ",
-                "value": "NA",
-                "filters": []
-              },
-              {
-                "name": "",
-                "key": "Continent",
-                "op": "EQ",
-                "value": "SA",
-                "filters": []
-              }
-            ]
-          }
-        ]
-      },
-      "result": [
-        [
-          1,
-          4
-        ],
-        [
-          8,
-          12,
-          5,
-          10
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/non_strict.json

@@ -1,95 +0,0 @@
-{
-  "name": "non-strict selections",
-  "comment": "These test specify loose selection behaviour, to allow fetching already PUT objects even when there is not enough nodes to select from.",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        }
-      ]
-    },
-    {
-      "attributes": [ ]
-    }
-  ],
-  "tests": {
-    "not enough nodes (backup factor)": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "MyStore"
-          }
-        ],
-        "containerBackupFactor": 2,
-        "selectors": [
-          {
-            "name": "MyStore",
-            "count": 2,
-            "clause": "DISTINCT",
-            "attribute": "Country",
-            "filter": "FromRU"
-          }
-        ],
-        "filters": [
-          {
-            "name": "FromRU",
-            "key": "Country",
-            "op": "EQ",
-            "value": "Russia",
-            "filters": [ ]
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    },
-    "not enough nodes (buckets)": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "MyStore"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "MyStore",
-            "count": 2,
-            "clause": "DISTINCT",
-            "attribute": "Country",
-            "filter": "FromRU"
-          }
-        ],
-        "filters": [
-          {
-            "name": "FromRU",
-            "key": "Country",
-            "op": "EQ",
-            "value": "Russia",
-            "filters": [ ]
-          }
-        ]
-      },
-      "result": [
-        [
-          0
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/rep_only.json

@@ -1,117 +0,0 @@
-{
-  "name": "REP X",
-  "nodes": [
-    {
-      "publicKey": "",
-      "addresses": [],
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Saint-Petersburg",
-          "parents": []
-        }
-      ],
-      "state": "UNSPECIFIED"
-    },
-    {
-      "publicKey": "",
-      "addresses": [],
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Moscow",
-          "parents": []
-        }
-      ],
-      "state": "UNSPECIFIED"
-    },
-    {
-      "publicKey": "",
-      "addresses": [],
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Berlin",
-          "parents": []
-        }
-      ],
-      "state": "UNSPECIFIED"
-    },
-    {
-      "publicKey": "",
-      "addresses": [],
-      "attributes": [
-        {
-          "key": "City",
-          "value": "Paris",
-          "parents": []
-        }
-      ],
-      "state": "UNSPECIFIED"
-    }
-  ],
-  "tests": {
-    "REP 1": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": ""
-          }
-        ],
-        "containerBackupFactor": 0,
-        "selectors": [],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2
-        ]
-      ]
-    },
-    "REP 3": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 3,
-            "selector": ""
-          }
-        ],
-        "containerBackupFactor": 0,
-        "selectors": [],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          3,
-          1,
-          2
-        ]
-      ]
-    },
-    "REP 5": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 5,
-            "selector": ""
-          }
-        ],
-        "containerBackupFactor": 0,
-        "selectors": [],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2,
-          3
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/select_no_attribute.json

@@ -1,116 +0,0 @@
-{
-  "name": "select with unspecified attribute",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "1"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "St.Petersburg"
-        },
-        {
-          "key": "SSD",
-          "value": "0"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "2"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "St.Petersburg"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "3"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "ID",
-          "value": "4"
-        },
-        {
-          "key": "Country",
-          "value": "RU"
-        },
-        {
-          "key": "City",
-          "value": "Moscow"
-        },
-        {
-          "key": "SSD",
-          "value": "1"
-        }
-      ]
-    }
-  ],
-  "tests": {
-    "test": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "X"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "X",
-            "count": 4,
-            "clause": "DISTINCT",
-            "attribute": "",
-            "filter": "*"
-          }
-        ],
-        "filters": []
-      },
-      "result": [
-        [
-          0,
-          1,
-          2,
-          3
-        ]
-      ]
-    }
-  }
-}

netmap/json_tests/selector_invalid.json

@@ -1,86 +0,0 @@
-{
-  "name": "invalid selections",
-  "nodes": [
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Russia"
-        }
-      ]
-    },
-    {
-      "attributes": [
-        {
-          "key": "Country",
-          "value": "Germany"
-        }
-      ]
-    },
-    {
-      "attributes": []
-    }
-  ],
-  "tests": {
-    "missing filter": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "MyStore"
-          }
-        ],
-        "containerBackupFactor": 1,
-        "selectors": [
-          {
-            "name": "MyStore",
-            "count": 1,
-            "clause": "DISTINCT",
-            "attribute": "Country",
-            "filter": "FromNL"
-          }
-        ],
-        "filters": [
-          {
-            "name": "FromRU",
-            "key": "Country",
-            "op": "EQ",
-            "value": "Russia",
-            "filters": []
-          }
-        ]
-      },
-      "error": "filter not found"
-    },
-    "not enough nodes (filter results in empty set)": {
-      "policy": {
-        "replicas": [
-          {
-            "count": 1,
-            "selector": "MyStore"
-          }
-        ],
-        "containerBackupFactor": 2,
-        "selectors": [
-          {
-            "name": "MyStore",
-            "count": 2,
-            "clause": "DISTINCT",
-            "attribute": "Country",
-            "filter": "FromMoon"
-          }
-        ],
-        "filters": [
-          {
-            "name": "FromMoon",
-            "key": "Country",
-            "op": "EQ",
-            "value": "Moon",
-            "filters": []
-          }
-        ]
-      },
-      "error": "not enough nodes"
-    }
-  }
-}

netmap/netmap.go

@@ -209,6 +209,25 @@ func (m NetMap) SelectFilterNodes(expr *SelectFilterExpr) ([][]NodeInfo, error)
 	return ret, nil
 }
 
+func countNodes(r netmap.Replica) uint32 {
+	if r.GetCount() != 0 {
+		return r.GetCount()
+	}
+	return r.GetECDataCount() + r.GetECParityCount()
+}
+
+func (p PlacementPolicy) isUnique() bool {
+	if p.unique {
+		return true
+	}
+	for _, r := range p.replicas {
+		if r.GetECDataCount() != 0 || r.GetECParityCount() != 0 {
+			return true
+		}
+	}
+	return false
+}
+
 // ContainerNodes returns two-dimensional list of nodes as a result of applying
 // given PlacementPolicy to the NetMap. Each line of the list corresponds to a
 // replica descriptor. Line order corresponds to order of ReplicaDescriptor list
@@ -230,6 +249,7 @@ func (m NetMap) ContainerNodes(p PlacementPolicy, pivot []byte) ([][]NodeInfo, e
 		return nil, err
 	}
 
+	unique := p.isUnique()
 	result := make([][]NodeInfo, len(p.replicas))
 
 	// Note that the cached selectors are not used when the policy contains the UNIQUE flag.
@@ -240,7 +260,7 @@ func (m NetMap) ContainerNodes(p PlacementPolicy, pivot []byte) ([][]NodeInfo, e
 		sName := p.replicas[i].GetSelector()
 		if sName == "" && !(len(p.replicas) == 1 && len(p.selectors) == 1) {
 			var s netmap.Selector
-			s.SetCount(p.replicas[i].GetCount())
+			s.SetCount(countNodes(p.replicas[i]))
 			s.SetFilter(mainFilterName)
 
 			nodes, err := c.getSelection(s)
@@ -250,14 +270,14 @@ func (m NetMap) ContainerNodes(p PlacementPolicy, pivot []byte) ([][]NodeInfo, e
 
 			result[i] = append(result[i], flattenNodes(nodes)...)
 
-			if p.unique {
+			if unique {
 				c.addUsedNodes(result[i]...)
 			}
 
 			continue
 		}
 
-		if p.unique {
+		if unique {
 			if c.processedSelectors[sName] == nil {
 				return nil, fmt.Errorf("selector not found: '%s'", sName)
 			}

netmap/network_info.go

@@ -62,6 +62,8 @@ func (x *NetworkInfo) readFromV2(m netmap.NetworkInfo, checkFieldPresence bool)
 			configEpochDuration,
 			configIRCandidateFee,
 			configMaxObjSize,
+			configMaxECDataCount,
+			configMaxECParityCount,
 			configWithdrawalFee:
 			_, err = decodeConfigValueUint64(prm.GetValue())
 		case configHomomorphicHashingDisabled,
@@ -234,6 +236,8 @@ func (x *NetworkInfo) IterateRawNetworkParameters(f func(name string, value []by
 			configEpochDuration,
 			configIRCandidateFee,
 			configMaxObjSize,
+			configMaxECDataCount,
+			configMaxECParityCount,
 			configWithdrawalFee,
 			configHomomorphicHashingDisabled,
 			configMaintenanceModeAllowed:
@@ -432,6 +436,34 @@ func (x NetworkInfo) MaxObjectSize() uint64 {
 	return x.configUint64(configMaxObjSize)
 }
 
+const configMaxECDataCount = "MaxECDataCount"
+
+// SetMaxECDataCount sets maximum number of data shards for erasure codes.
+//
+// Zero means no restrictions.
+func (x *NetworkInfo) SetMaxECDataCount(dataCount uint64) {
+	x.setConfigUint64(configMaxECDataCount, dataCount)
+}
+
+// MaxECDataCount returns maximum number of data shards for erasure codes.
+func (x NetworkInfo) MaxECDataCount() uint64 {
+	return x.configUint64(configMaxECDataCount)
+}
+
+const configMaxECParityCount = "MaxECParityCount"
+
+// SetMaxECParityCount sets maximum number of parity shards for erasure codes.
+//
+// Zero means no restrictions.
+func (x *NetworkInfo) SetMaxECParityCount(parityCount uint64) {
+	x.setConfigUint64(configMaxECParityCount, parityCount)
+}
+
+// MaxECParityCount returns maximum number of parity shards for erasure codes.
+func (x NetworkInfo) MaxECParityCount() uint64 {
+	return x.configUint64(configMaxECParityCount)
+}
+
 const configWithdrawalFee = "WithdrawFee"
 
 // SetWithdrawalFee sets fee for withdrawals from the FrostFS accounts that

netmap/network_info_test.go

@@ -173,6 +173,32 @@ func TestNetworkInfo_MaxObjectSize(t *testing.T) {
 	)
 }
 
+func TestNetworkInfo_MaxECDataCount(t *testing.T) {
+	testConfigValue(t,
+		func(x NetworkInfo) any { return x.MaxECDataCount() },
+		func(info *NetworkInfo, val any) { info.SetMaxECDataCount(val.(uint64)) },
+		uint64(1), uint64(2),
+		"MaxECDataCount", func(val any) []byte {
+			data := make([]byte, 8)
+			binary.LittleEndian.PutUint64(data, val.(uint64))
+			return data
+		},
+	)
+}
+
+func TestNetworkInfo_MaxECParityCount(t *testing.T) {
+	testConfigValue(t,
+		func(x NetworkInfo) any { return x.MaxECParityCount() },
+		func(info *NetworkInfo, val any) { info.SetMaxECParityCount(val.(uint64)) },
+		uint64(1), uint64(2),
+		"MaxECParityCount", func(val any) []byte {
+			data := make([]byte, 8)
+			binary.LittleEndian.PutUint64(data, val.(uint64))
+			return data
+		},
+	)
+}
+
 func TestNetworkInfo_WithdrawalFee(t *testing.T) {
 	testConfigValue(t,
 		func(x NetworkInfo) any { return x.WithdrawalFee() },

netmap/parser/Query.g4

@@ -4,10 +4,14 @@ options {
     tokenVocab = QueryLexer;
 }
 
-policy: UNIQUE? repStmt+ cbfStmt? selectStmt* filterStmt* EOF;
+policy: UNIQUE? (repStmt | ecStmt)+ cbfStmt? selectStmt* filterStmt* EOF;
 
 selectFilterExpr: cbfStmt? selectStmt? filterStmt* EOF;
 
+ecStmt:
+    EC Data = NUMBER1 DOT Parity = NUMBER1 // erasure code configuration
+    (IN Selector = ident)?;                // optional selector name
+
 repStmt:
     REP Count = NUMBER1     // number of object replicas
     (IN Selector = ident)?; // optional selector name

netmap/parser/QueryLexer.g4

@@ -7,6 +7,7 @@ SIMPLE_OP  : 'EQ' | 'NE' | 'GE' | 'GT' | 'LT' | 'LE';
 
 UNIQUE   : 'UNIQUE';
 REP      : 'REP';
+EC       : 'EC';
 IN       : 'IN';
 AS       : 'AS';
 CBF      : 'CBF';
@@ -14,6 +15,7 @@ SELECT   : 'SELECT';
 FROM     : 'FROM';
 FILTER   : 'FILTER';
 WILDCARD : '*';
+DOT      : '.';
 
 CLAUSE_SAME     : 'SAME';
 CLAUSE_DISTINCT : 'DISTINCT';

netmap/parser/query_base_visitor.go

@@ -1,4 +1,4 @@
-// Code generated from Query.g4 by ANTLR 4.13.0. DO NOT EDIT.
+// Code generated from /repo/frostfs/sdk-go/netmap/parser/Query.g4 by ANTLR 4.13.0. DO NOT EDIT.
 
 package parser // Query
 
@@ -16,6 +16,10 @@ func (v *BaseQueryVisitor) VisitSelectFilterExpr(ctx *SelectFilterExprContext) i
 	return v.VisitChildren(ctx)
 }
 
+func (v *BaseQueryVisitor) VisitEcStmt(ctx *EcStmtContext) interface{} {
+	return v.VisitChildren(ctx)
+}
+
 func (v *BaseQueryVisitor) VisitRepStmt(ctx *RepStmtContext) interface{} {
 	return v.VisitChildren(ctx)
 }

netmap/parser/query_lexer.go

@@ -1,4 +1,4 @@
-// Code generated from QueryLexer.g4 by ANTLR 4.13.0. DO NOT EDIT.
+// Code generated from /repo/frostfs/sdk-go/netmap/parser/QueryLexer.g4 by ANTLR 4.13.0. DO NOT EDIT.
 
 package parser
 
@@ -43,119 +43,123 @@ func querylexerLexerInit() {
 		"DEFAULT_MODE",
 	}
 	staticData.LiteralNames = []string{
-		"", "'NOT'", "'AND'", "'OR'", "", "'UNIQUE'", "'REP'", "'IN'", "'AS'",
+		"", "'NOT'", "'AND'", "'OR'", "", "'UNIQUE'", "'REP'", "'EC'", "'IN'",
-		"'CBF'", "'SELECT'", "'FROM'", "'FILTER'", "'*'", "'SAME'", "'DISTINCT'",
+		"'AS'", "'CBF'", "'SELECT'", "'FROM'", "'FILTER'", "'*'", "'.'", "'SAME'",
-		"'('", "')'", "'@'", "", "", "'0'",
+		"'DISTINCT'", "'('", "')'", "'@'", "", "", "'0'",
 	}
 	staticData.SymbolicNames = []string{
-		"", "NOT_OP", "AND_OP", "OR_OP", "SIMPLE_OP", "UNIQUE", "REP", "IN",
+		"", "NOT_OP", "AND_OP", "OR_OP", "SIMPLE_OP", "UNIQUE", "REP", "EC",
-		"AS", "CBF", "SELECT", "FROM", "FILTER", "WILDCARD", "CLAUSE_SAME",
+		"IN", "AS", "CBF", "SELECT", "FROM", "FILTER", "WILDCARD", "DOT", "CLAUSE_SAME",
 		"CLAUSE_DISTINCT", "L_PAREN", "R_PAREN", "AT", "IDENT", "NUMBER1", "ZERO",
 		"STRING", "WS",
 	}
 	staticData.RuleNames = []string{
-		"NOT_OP", "AND_OP", "OR_OP", "SIMPLE_OP", "UNIQUE", "REP", "IN", "AS",
+		"NOT_OP", "AND_OP", "OR_OP", "SIMPLE_OP", "UNIQUE", "REP", "EC", "IN",
-		"CBF", "SELECT", "FROM", "FILTER", "WILDCARD", "CLAUSE_SAME", "CLAUSE_DISTINCT",
+		"AS", "CBF", "SELECT", "FROM", "FILTER", "WILDCARD", "DOT", "CLAUSE_SAME",
-		"L_PAREN", "R_PAREN", "AT", "IDENT", "Digit", "Nondigit", "NUMBER1",
+		"CLAUSE_DISTINCT", "L_PAREN", "R_PAREN", "AT", "IDENT", "Digit", "Nondigit",
-		"ZERO", "STRING", "ESC", "UNICODE", "HEX", "SAFECODEPOINTSINGLE", "SAFECODEPOINTDOUBLE",
+		"NUMBER1", "ZERO", "STRING", "ESC", "UNICODE", "HEX", "SAFECODEPOINTSINGLE",
-		"WS",
+		"SAFECODEPOINTDOUBLE", "WS",
 	}
 	staticData.PredictionContextCache = antlr.NewPredictionContextCache()
 	staticData.serializedATN = []int32{
-		4, 0, 23, 213, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2,
+		4, 0, 25, 222, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2,
 		4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2,
 		10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15,
 		7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7,
 		20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 2, 25, 7, 25,
-		2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 1, 0, 1, 0, 1,
+		2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 2, 30, 7, 30, 2,
-		0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1,
+		31, 7, 31, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2,
-		3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 3, 3, 85, 8, 3, 1, 4,
+		1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3,
-		1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6,
+		1, 3, 3, 3, 89, 8, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 5, 1,
-		1, 6, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9,
+		5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1,
-		1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11,
+		9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1,
-		1, 11, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1,
+		11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12,
-		13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15,
+		1, 12, 1, 13, 1, 13, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1,
-		1, 15, 1, 16, 1, 16, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 5, 18, 152, 8,
+		16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17,
-		18, 10, 18, 12, 18, 155, 9, 18, 1, 19, 1, 19, 1, 20, 1, 20, 1, 21, 1, 21,
+		1, 18, 1, 18, 1, 19, 1, 19, 1, 20, 1, 20, 1, 20, 5, 20, 161, 8, 20, 10,
-		5, 21, 163, 8, 21, 10, 21, 12, 21, 166, 9, 21, 1, 22, 1, 22, 1, 23, 1,
+		20, 12, 20, 164, 9, 20, 1, 21, 1, 21, 1, 22, 1, 22, 1, 23, 1, 23, 5, 23,
-		23, 1, 23, 5, 23, 173, 8, 23, 10, 23, 12, 23, 176, 9, 23, 1, 23, 1, 23,
+		172, 8, 23, 10, 23, 12, 23, 175, 9, 23, 1, 24, 1, 24, 1, 25, 1, 25, 1,
-		1, 23, 1, 23, 5, 23, 182, 8, 23, 10, 23, 12, 23, 185, 9, 23, 1, 23, 3,
+		25, 5, 25, 182, 8, 25, 10, 25, 12, 25, 185, 9, 25, 1, 25, 1, 25, 1, 25,
-		23, 188, 8, 23, 1, 24, 1, 24, 1, 24, 3, 24, 193, 8, 24, 1, 25, 1, 25, 1,
+		1, 25, 5, 25, 191, 8, 25, 10, 25, 12, 25, 194, 9, 25, 1, 25, 3, 25, 197,
-		25, 1, 25, 1, 25, 1, 25, 1, 26, 1, 26, 1, 27, 1, 27, 1, 28, 1, 28, 1, 29,
+		8, 25, 1, 26, 1, 26, 1, 26, 3, 26, 202, 8, 26, 1, 27, 1, 27, 1, 27, 1,
-		4, 29, 208, 8, 29, 11, 29, 12, 29, 209, 1, 29, 1, 29, 0, 0, 30, 1, 1, 3,
+		27, 1, 27, 1, 27, 1, 28, 1, 28, 1, 29, 1, 29, 1, 30, 1, 30, 1, 31, 4, 31,
-		2, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12,
+		217, 8, 31, 11, 31, 12, 31, 218, 1, 31, 1, 31, 0, 0, 32, 1, 1, 3, 2, 5,
-		25, 13, 27, 14, 29, 15, 31, 16, 33, 17, 35, 18, 37, 19, 39, 0, 41, 0, 43,
+		3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12, 25,
-		20, 45, 21, 47, 22, 49, 0, 51, 0, 53, 0, 55, 0, 57, 0, 59, 23, 1, 0, 8,
+		13, 27, 14, 29, 15, 31, 16, 33, 17, 35, 18, 37, 19, 39, 20, 41, 21, 43,
-		1, 0, 48, 57, 3, 0, 65, 90, 95, 95, 97, 122, 1, 0, 49, 57, 9, 0, 34, 34,
+		0, 45, 0, 47, 22, 49, 23, 51, 24, 53, 0, 55, 0, 57, 0, 59, 0, 61, 0, 63,
-		39, 39, 47, 47, 92, 92, 98, 98, 102, 102, 110, 110, 114, 114, 116, 116,
+		25, 1, 0, 8, 1, 0, 48, 57, 3, 0, 65, 90, 95, 95, 97, 122, 1, 0, 49, 57,
-		3, 0, 48, 57, 65, 70, 97, 102, 3, 0, 0, 31, 39, 39, 92, 92, 3, 0, 0, 31,
+		9, 0, 34, 34, 39, 39, 47, 47, 92, 92, 98, 98, 102, 102, 110, 110, 114,
-		34, 34, 92, 92, 3, 0, 9, 10, 13, 13, 32, 32, 220, 0, 1, 1, 0, 0, 0, 0,
+		114, 116, 116, 3, 0, 48, 57, 65, 70, 97, 102, 3, 0, 0, 31, 39, 39, 92,
-		3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9, 1, 0, 0, 0, 0,
+		92, 3, 0, 0, 31, 34, 34, 92, 92, 3, 0, 9, 10, 13, 13, 32, 32, 229, 0, 1,
-		11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 17, 1, 0, 0, 0,
+		1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9,
-		0, 19, 1, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 23, 1, 0, 0, 0, 0, 25, 1, 0, 0,
+		1, 0, 0, 0, 0, 11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0,
-		0, 0, 27, 1, 0, 0, 0, 0, 29, 1, 0, 0, 0, 0, 31, 1, 0, 0, 0, 0, 33, 1, 0,
+		17, 1, 0, 0, 0, 0, 19, 1, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 23, 1, 0, 0, 0,
-		0, 0, 0, 35, 1, 0, 0, 0, 0, 37, 1, 0, 0, 0, 0, 43, 1, 0, 0, 0, 0, 45, 1,
+		0, 25, 1, 0, 0, 0, 0, 27, 1, 0, 0, 0, 0, 29, 1, 0, 0, 0, 0, 31, 1, 0, 0,
-		0, 0, 0, 0, 47, 1, 0, 0, 0, 0, 59, 1, 0, 0, 0, 1, 61, 1, 0, 0, 0, 3, 65,
+		0, 0, 33, 1, 0, 0, 0, 0, 35, 1, 0, 0, 0, 0, 37, 1, 0, 0, 0, 0, 39, 1, 0,
-		1, 0, 0, 0, 5, 69, 1, 0, 0, 0, 7, 84, 1, 0, 0, 0, 9, 86, 1, 0, 0, 0, 11,
+		0, 0, 0, 41, 1, 0, 0, 0, 0, 47, 1, 0, 0, 0, 0, 49, 1, 0, 0, 0, 0, 51, 1,
-		93, 1, 0, 0, 0, 13, 97, 1, 0, 0, 0, 15, 100, 1, 0, 0, 0, 17, 103, 1, 0,
+		0, 0, 0, 0, 63, 1, 0, 0, 0, 1, 65, 1, 0, 0, 0, 3, 69, 1, 0, 0, 0, 5, 73,
-		0, 0, 19, 107, 1, 0, 0, 0, 21, 114, 1, 0, 0, 0, 23, 119, 1, 0, 0, 0, 25,
+		1, 0, 0, 0, 7, 88, 1, 0, 0, 0, 9, 90, 1, 0, 0, 0, 11, 97, 1, 0, 0, 0, 13,
-		126, 1, 0, 0, 0, 27, 128, 1, 0, 0, 0, 29, 133, 1, 0, 0, 0, 31, 142, 1,
+		101, 1, 0, 0, 0, 15, 104, 1, 0, 0, 0, 17, 107, 1, 0, 0, 0, 19, 110, 1,
-		0, 0, 0, 33, 144, 1, 0, 0, 0, 35, 146, 1, 0, 0, 0, 37, 148, 1, 0, 0, 0,
+		0, 0, 0, 21, 114, 1, 0, 0, 0, 23, 121, 1, 0, 0, 0, 25, 126, 1, 0, 0, 0,
-		39, 156, 1, 0, 0, 0, 41, 158, 1, 0, 0, 0, 43, 160, 1, 0, 0, 0, 45, 167,
+		27, 133, 1, 0, 0, 0, 29, 135, 1, 0, 0, 0, 31, 137, 1, 0, 0, 0, 33, 142,
-		1, 0, 0, 0, 47, 187, 1, 0, 0, 0, 49, 189, 1, 0, 0, 0, 51, 194, 1, 0, 0,
+		1, 0, 0, 0, 35, 151, 1, 0, 0, 0, 37, 153, 1, 0, 0, 0, 39, 155, 1, 0, 0,
-		0, 53, 200, 1, 0, 0, 0, 55, 202, 1, 0, 0, 0, 57, 204, 1, 0, 0, 0, 59, 207,
+		0, 41, 157, 1, 0, 0, 0, 43, 165, 1, 0, 0, 0, 45, 167, 1, 0, 0, 0, 47, 169,
-		1, 0, 0, 0, 61, 62, 5, 78, 0, 0, 62, 63, 5, 79, 0, 0, 63, 64, 5, 84, 0,
+		1, 0, 0, 0, 49, 176, 1, 0, 0, 0, 51, 196, 1, 0, 0, 0, 53, 198, 1, 0, 0,
-		0, 64, 2, 1, 0, 0, 0, 65, 66, 5, 65, 0, 0, 66, 67, 5, 78, 0, 0, 67, 68,
+		0, 55, 203, 1, 0, 0, 0, 57, 209, 1, 0, 0, 0, 59, 211, 1, 0, 0, 0, 61, 213,
-		5, 68, 0, 0, 68, 4, 1, 0, 0, 0, 69, 70, 5, 79, 0, 0, 70, 71, 5, 82, 0,
+		1, 0, 0, 0, 63, 216, 1, 0, 0, 0, 65, 66, 5, 78, 0, 0, 66, 67, 5, 79, 0,
-		0, 71, 6, 1, 0, 0, 0, 72, 73, 5, 69, 0, 0, 73, 85, 5, 81, 0, 0, 74, 75,
+		0, 67, 68, 5, 84, 0, 0, 68, 2, 1, 0, 0, 0, 69, 70, 5, 65, 0, 0, 70, 71,
-		5, 78, 0, 0, 75, 85, 5, 69, 0, 0, 76, 77, 5, 71, 0, 0, 77, 85, 5, 69, 0,
+		5, 78, 0, 0, 71, 72, 5, 68, 0, 0, 72, 4, 1, 0, 0, 0, 73, 74, 5, 79, 0,
-		0, 78, 79, 5, 71, 0, 0, 79, 85, 5, 84, 0, 0, 80, 81, 5, 76, 0, 0, 81, 85,
+		0, 74, 75, 5, 82, 0, 0, 75, 6, 1, 0, 0, 0, 76, 77, 5, 69, 0, 0, 77, 89,
-		5, 84, 0, 0, 82, 83, 5, 76, 0, 0, 83, 85, 5, 69, 0, 0, 84, 72, 1, 0, 0,
+		5, 81, 0, 0, 78, 79, 5, 78, 0, 0, 79, 89, 5, 69, 0, 0, 80, 81, 5, 71, 0,
-		0, 84, 74, 1, 0, 0, 0, 84, 76, 1, 0, 0, 0, 84, 78, 1, 0, 0, 0, 84, 80,
+		0, 81, 89, 5, 69, 0, 0, 82, 83, 5, 71, 0, 0, 83, 89, 5, 84, 0, 0, 84, 85,
-		1, 0, 0, 0, 84, 82, 1, 0, 0, 0, 85, 8, 1, 0, 0, 0, 86, 87, 5, 85, 0, 0,
+		5, 76, 0, 0, 85, 89, 5, 84, 0, 0, 86, 87, 5, 76, 0, 0, 87, 89, 5, 69, 0,
-		87, 88, 5, 78, 0, 0, 88, 89, 5, 73, 0, 0, 89, 90, 5, 81, 0, 0, 90, 91,
+		0, 88, 76, 1, 0, 0, 0, 88, 78, 1, 0, 0, 0, 88, 80, 1, 0, 0, 0, 88, 82,
-		5, 85, 0, 0, 91, 92, 5, 69, 0, 0, 92, 10, 1, 0, 0, 0, 93, 94, 5, 82, 0,
+		1, 0, 0, 0, 88, 84, 1, 0, 0, 0, 88, 86, 1, 0, 0, 0, 89, 8, 1, 0, 0, 0,
-		0, 94, 95, 5, 69, 0, 0, 95, 96, 5, 80, 0, 0, 96, 12, 1, 0, 0, 0, 97, 98,
+		90, 91, 5, 85, 0, 0, 91, 92, 5, 78, 0, 0, 92, 93, 5, 73, 0, 0, 93, 94,
-		5, 73, 0, 0, 98, 99, 5, 78, 0, 0, 99, 14, 1, 0, 0, 0, 100, 101, 5, 65,
+		5, 81, 0, 0, 94, 95, 5, 85, 0, 0, 95, 96, 5, 69, 0, 0, 96, 10, 1, 0, 0,
-		0, 0, 101, 102, 5, 83, 0, 0, 102, 16, 1, 0, 0, 0, 103, 104, 5, 67, 0, 0,
+		0, 97, 98, 5, 82, 0, 0, 98, 99, 5, 69, 0, 0, 99, 100, 5, 80, 0, 0, 100,
-		104, 105, 5, 66, 0, 0, 105, 106, 5, 70, 0, 0, 106, 18, 1, 0, 0, 0, 107,
+		12, 1, 0, 0, 0, 101, 102, 5, 69, 0, 0, 102, 103, 5, 67, 0, 0, 103, 14,
-		108, 5, 83, 0, 0, 108, 109, 5, 69, 0, 0, 109, 110, 5, 76, 0, 0, 110, 111,
+		1, 0, 0, 0, 104, 105, 5, 73, 0, 0, 105, 106, 5, 78, 0, 0, 106, 16, 1, 0,
-		5, 69, 0, 0, 111, 112, 5, 67, 0, 0, 112, 113, 5, 84, 0, 0, 113, 20, 1,
+		0, 0, 107, 108, 5, 65, 0, 0, 108, 109, 5, 83, 0, 0, 109, 18, 1, 0, 0, 0,
-		0, 0, 0, 114, 115, 5, 70, 0, 0, 115, 116, 5, 82, 0, 0, 116, 117, 5, 79,
+		110, 111, 5, 67, 0, 0, 111, 112, 5, 66, 0, 0, 112, 113, 5, 70, 0, 0, 113,
-		0, 0, 117, 118, 5, 77, 0, 0, 118, 22, 1, 0, 0, 0, 119, 120, 5, 70, 0, 0,
+		20, 1, 0, 0, 0, 114, 115, 5, 83, 0, 0, 115, 116, 5, 69, 0, 0, 116, 117,
-		120, 121, 5, 73, 0, 0, 121, 122, 5, 76, 0, 0, 122, 123, 5, 84, 0, 0, 123,
+		5, 76, 0, 0, 117, 118, 5, 69, 0, 0, 118, 119, 5, 67, 0, 0, 119, 120, 5,
-		124, 5, 69, 0, 0, 124, 125, 5, 82, 0, 0, 125, 24, 1, 0, 0, 0, 126, 127,
+		84, 0, 0, 120, 22, 1, 0, 0, 0, 121, 122, 5, 70, 0, 0, 122, 123, 5, 82,
-		5, 42, 0, 0, 127, 26, 1, 0, 0, 0, 128, 129, 5, 83, 0, 0, 129, 130, 5, 65,
+		0, 0, 123, 124, 5, 79, 0, 0, 124, 125, 5, 77, 0, 0, 125, 24, 1, 0, 0, 0,
-		0, 0, 130, 131, 5, 77, 0, 0, 131, 132, 5, 69, 0, 0, 132, 28, 1, 0, 0, 0,
+		126, 127, 5, 70, 0, 0, 127, 128, 5, 73, 0, 0, 128, 129, 5, 76, 0, 0, 129,
-		133, 134, 5, 68, 0, 0, 134, 135, 5, 73, 0, 0, 135, 136, 5, 83, 0, 0, 136,
+		130, 5, 84, 0, 0, 130, 131, 5, 69, 0, 0, 131, 132, 5, 82, 0, 0, 132, 26,
-		137, 5, 84, 0, 0, 137, 138, 5, 73, 0, 0, 138, 139, 5, 78, 0, 0, 139, 140,
+		1, 0, 0, 0, 133, 134, 5, 42, 0, 0, 134, 28, 1, 0, 0, 0, 135, 136, 5, 46,
-		5, 67, 0, 0, 140, 141, 5, 84, 0, 0, 141, 30, 1, 0, 0, 0, 142, 143, 5, 40,
+		0, 0, 136, 30, 1, 0, 0, 0, 137, 138, 5, 83, 0, 0, 138, 139, 5, 65, 0, 0,
-		0, 0, 143, 32, 1, 0, 0, 0, 144, 145, 5, 41, 0, 0, 145, 34, 1, 0, 0, 0,
+		139, 140, 5, 77, 0, 0, 140, 141, 5, 69, 0, 0, 141, 32, 1, 0, 0, 0, 142,
-		146, 147, 5, 64, 0, 0, 147, 36, 1, 0, 0, 0, 148, 153, 3, 41, 20, 0, 149,
+		143, 5, 68, 0, 0, 143, 144, 5, 73, 0, 0, 144, 145, 5, 83, 0, 0, 145, 146,
-		152, 3, 39, 19, 0, 150, 152, 3, 41, 20, 0, 151, 149, 1, 0, 0, 0, 151, 150,
+		5, 84, 0, 0, 146, 147, 5, 73, 0, 0, 147, 148, 5, 78, 0, 0, 148, 149, 5,
-		1, 0, 0, 0, 152, 155, 1, 0, 0, 0, 153, 151, 1, 0, 0, 0, 153, 154, 1, 0,
+		67, 0, 0, 149, 150, 5, 84, 0, 0, 150, 34, 1, 0, 0, 0, 151, 152, 5, 40,
-		0, 0, 154, 38, 1, 0, 0, 0, 155, 153, 1, 0, 0, 0, 156, 157, 7, 0, 0, 0,
+		0, 0, 152, 36, 1, 0, 0, 0, 153, 154, 5, 41, 0, 0, 154, 38, 1, 0, 0, 0,
-		157, 40, 1, 0, 0, 0, 158, 159, 7, 1, 0, 0, 159, 42, 1, 0, 0, 0, 160, 164,
+		155, 156, 5, 64, 0, 0, 156, 40, 1, 0, 0, 0, 157, 162, 3, 45, 22, 0, 158,
-		7, 2, 0, 0, 161, 163, 3, 39, 19, 0, 162, 161, 1, 0, 0, 0, 163, 166, 1,
+		161, 3, 43, 21, 0, 159, 161, 3, 45, 22, 0, 160, 158, 1, 0, 0, 0, 160, 159,
-		0, 0, 0, 164, 162, 1, 0, 0, 0, 164, 165, 1, 0, 0, 0, 165, 44, 1, 0, 0,
+		1, 0, 0, 0, 161, 164, 1, 0, 0, 0, 162, 160, 1, 0, 0, 0, 162, 163, 1, 0,
-		0, 166, 164, 1, 0, 0, 0, 167, 168, 5, 48, 0, 0, 168, 46, 1, 0, 0, 0, 169,
+		0, 0, 163, 42, 1, 0, 0, 0, 164, 162, 1, 0, 0, 0, 165, 166, 7, 0, 0, 0,
-		174, 5, 34, 0, 0, 170, 173, 3, 49, 24, 0, 171, 173, 3, 57, 28, 0, 172,
+		166, 44, 1, 0, 0, 0, 167, 168, 7, 1, 0, 0, 168, 46, 1, 0, 0, 0, 169, 173,
-		170, 1, 0, 0, 0, 172, 171, 1, 0, 0, 0, 173, 176, 1, 0, 0, 0, 174, 172,
+		7, 2, 0, 0, 170, 172, 3, 43, 21, 0, 171, 170, 1, 0, 0, 0, 172, 175, 1,
-		1, 0, 0, 0, 174, 175, 1, 0, 0, 0, 175, 177, 1, 0, 0, 0, 176, 174, 1, 0,
+		0, 0, 0, 173, 171, 1, 0, 0, 0, 173, 174, 1, 0, 0, 0, 174, 48, 1, 0, 0,
-		0, 0, 177, 188, 5, 34, 0, 0, 178, 183, 5, 39, 0, 0, 179, 182, 3, 49, 24,
+		0, 175, 173, 1, 0, 0, 0, 176, 177, 5, 48, 0, 0, 177, 50, 1, 0, 0, 0, 178,
-		0, 180, 182, 3, 55, 27, 0, 181, 179, 1, 0, 0, 0, 181, 180, 1, 0, 0, 0,
+		183, 5, 34, 0, 0, 179, 182, 3, 53, 26, 0, 180, 182, 3, 61, 30, 0, 181,
-		182, 185, 1, 0, 0, 0, 183, 181, 1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184,
+		179, 1, 0, 0, 0, 181, 180, 1, 0, 0, 0, 182, 185, 1, 0, 0, 0, 183, 181,
-		186, 1, 0, 0, 0, 185, 183, 1, 0, 0, 0, 186, 188, 5, 39, 0, 0, 187, 169,
+		1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184, 186, 1, 0, 0, 0, 185, 183, 1, 0,
-		1, 0, 0, 0, 187, 178, 1, 0, 0, 0, 188, 48, 1, 0, 0, 0, 189, 192, 5, 92,
+		0, 0, 186, 197, 5, 34, 0, 0, 187, 192, 5, 39, 0, 0, 188, 191, 3, 53, 26,
-		0, 0, 190, 193, 7, 3, 0, 0, 191, 193, 3, 51, 25, 0, 192, 190, 1, 0, 0,
+		0, 189, 191, 3, 59, 29, 0, 190, 188, 1, 0, 0, 0, 190, 189, 1, 0, 0, 0,
-		0, 192, 191, 1, 0, 0, 0, 193, 50, 1, 0, 0, 0, 194, 195, 5, 117, 0, 0, 195,
+		191, 194, 1, 0, 0, 0, 192, 190, 1, 0, 0, 0, 192, 193, 1, 0, 0, 0, 193,
-		196, 3, 53, 26, 0, 196, 197, 3, 53, 26, 0, 197, 198, 3, 53, 26, 0, 198,
+		195, 1, 0, 0, 0, 194, 192, 1, 0, 0, 0, 195, 197, 5, 39, 0, 0, 196, 178,
-		199, 3, 53, 26, 0, 199, 52, 1, 0, 0, 0, 200, 201, 7, 4, 0, 0, 201, 54,
+		1, 0, 0, 0, 196, 187, 1, 0, 0, 0, 197, 52, 1, 0, 0, 0, 198, 201, 5, 92,
-		1, 0, 0, 0, 202, 203, 8, 5, 0, 0, 203, 56, 1, 0, 0, 0, 204, 205, 8, 6,
+		0, 0, 199, 202, 7, 3, 0, 0, 200, 202, 3, 55, 27, 0, 201, 199, 1, 0, 0,
-		0, 0, 205, 58, 1, 0, 0, 0, 206, 208, 7, 7, 0, 0, 207, 206, 1, 0, 0, 0,
+		0, 201, 200, 1, 0, 0, 0, 202, 54, 1, 0, 0, 0, 203, 204, 5, 117, 0, 0, 204,
-		208, 209, 1, 0, 0, 0, 209, 207, 1, 0, 0, 0, 209, 210, 1, 0, 0, 0, 210,
+		205, 3, 57, 28, 0, 205, 206, 3, 57, 28, 0, 206, 207, 3, 57, 28, 0, 207,
-		211, 1, 0, 0, 0, 211, 212, 6, 29, 0, 0, 212, 60, 1, 0, 0, 0, 12, 0, 84,
+		208, 3, 57, 28, 0, 208, 56, 1, 0, 0, 0, 209, 210, 7, 4, 0, 0, 210, 58,
-		151, 153, 164, 172, 174, 181, 183, 187, 192, 209, 1, 6, 0, 0,
+		1, 0, 0, 0, 211, 212, 8, 5, 0, 0, 212, 60, 1, 0, 0, 0, 213, 214, 8, 6,
+		0, 0, 214, 62, 1, 0, 0, 0, 215, 217, 7, 7, 0, 0, 216, 215, 1, 0, 0, 0,
+		217, 218, 1, 0, 0, 0, 218, 216, 1, 0, 0, 0, 218, 219, 1, 0, 0, 0, 219,
+		220, 1, 0, 0, 0, 220, 221, 6, 31, 0, 0, 221, 64, 1, 0, 0, 0, 12, 0, 88,
+		160, 162, 173, 181, 183, 190, 192, 196, 201, 218, 1, 6, 0, 0,
 	}
 	deserializer := antlr.NewATNDeserializer(nil)
 	staticData.atn = deserializer.Deserialize(staticData.serializedATN)
@@ -202,21 +206,23 @@ const (
 	QueryLexerSIMPLE_OP       = 4
 	QueryLexerUNIQUE          = 5
 	QueryLexerREP             = 6
-	QueryLexerIN              = 7
+	QueryLexerEC              = 7
-	QueryLexerAS              = 8
+	QueryLexerIN              = 8
-	QueryLexerCBF             = 9
+	QueryLexerAS              = 9
-	QueryLexerSELECT          = 10
+	QueryLexerCBF             = 10
-	QueryLexerFROM            = 11
+	QueryLexerSELECT          = 11
-	QueryLexerFILTER          = 12
+	QueryLexerFROM            = 12
-	QueryLexerWILDCARD        = 13
+	QueryLexerFILTER          = 13
-	QueryLexerCLAUSE_SAME     = 14
+	QueryLexerWILDCARD        = 14
-	QueryLexerCLAUSE_DISTINCT = 15
+	QueryLexerDOT             = 15
-	QueryLexerL_PAREN         = 16
+	QueryLexerCLAUSE_SAME     = 16
-	QueryLexerR_PAREN         = 17
+	QueryLexerCLAUSE_DISTINCT = 17
-	QueryLexerAT              = 18
+	QueryLexerL_PAREN         = 18
-	QueryLexerIDENT           = 19
+	QueryLexerR_PAREN         = 19
-	QueryLexerNUMBER1         = 20
+	QueryLexerAT              = 20
-	QueryLexerZERO            = 21
+	QueryLexerIDENT           = 21
-	QueryLexerSTRING          = 22
+	QueryLexerNUMBER1         = 22
-	QueryLexerWS              = 23
+	QueryLexerZERO            = 23
+	QueryLexerSTRING          = 24
+	QueryLexerWS              = 25
 )

netmap/parser/query_visitor.go

@@ -1,4 +1,4 @@
-// Code generated from Query.g4 by ANTLR 4.13.0. DO NOT EDIT.
+// Code generated from /repo/frostfs/sdk-go/netmap/parser/Query.g4 by ANTLR 4.13.0. DO NOT EDIT.
 
 package parser // Query
 
@@ -14,6 +14,9 @@ type QueryVisitor interface {
 	// Visit a parse tree produced by Query#selectFilterExpr.
 	VisitSelectFilterExpr(ctx *SelectFilterExprContext) interface{}
 
+	// Visit a parse tree produced by Query#ecStmt.
+	VisitEcStmt(ctx *EcStmtContext) interface{}
+
 	// Visit a parse tree produced by Query#repStmt.
 	VisitRepStmt(ctx *RepStmtContext) interface{}
 

netmap/policy.go

@@ -34,8 +34,17 @@ type PlacementPolicy struct {
 
 func (p *PlacementPolicy) readFromV2(m netmap.PlacementPolicy, checkFieldPresence bool) error {
 	p.replicas = m.GetReplicas()
-	if checkFieldPresence && len(p.replicas) == 0 {
+	if checkFieldPresence {
-		return errors.New("missing replicas")
+		if len(p.replicas) == 0 {
+			return errors.New("missing replicas")
+		}
+		if len(p.replicas) != 1 {
+			for i := range p.replicas {
+				if p.replicas[i].GetECDataCount() != 0 || p.replicas[i].GetECParityCount() != 0 {
+					return errors.New("erasure code group must be used exclusively")
+				}
+			}
+		}
 	}
 
 	p.backupFactor = m.GetContainerBackupFactor()
@@ -130,6 +139,14 @@ func (r *ReplicaDescriptor) SetNumberOfObjects(c uint32) {
 	r.m.SetCount(c)
 }
 
+func (r ReplicaDescriptor) SetECDataCount(v uint32) {
+	r.m.SetECDataCount(v)
+}
+
+func (r ReplicaDescriptor) SetECParityCount(v uint32) {
+	r.m.SetECParityCount(v)
+}
+
 // NumberOfObjects returns number set using SetNumberOfObjects.
 //
 // Zero ReplicaDescriptor has zero number of objects.
@@ -137,6 +154,19 @@ func (r ReplicaDescriptor) NumberOfObjects() uint32 {
 	return r.m.GetCount()
 }
 
+func (r ReplicaDescriptor) GetECDataCount() uint32 {
+	return r.m.GetECDataCount()
+}
+
+func (r ReplicaDescriptor) GetECParityCount() uint32 {
+	return r.m.GetECParityCount()
+}
+
+// TotalECPartCount returns total sum of ECDataCount and ECParityCount.
+func (r ReplicaDescriptor) TotalECPartCount() uint32 {
+	return r.m.GetECDataCount() + r.m.GetECParityCount()
+}
+
 // SetSelectorName sets name of the related Selector.
 //
 // Zero ReplicaDescriptor references to the root bucket's selector: it contains
@@ -170,10 +200,19 @@ func (p PlacementPolicy) NumberOfReplicas() int {
 // descriptor. Index MUST be in range [0; NumberOfReplicas()).
 //
 // Zero PlacementPolicy has no replicas.
+//
+// Deprecated: Use PlacementPolicy.ReplicaDescriptor(int).NumberOfObjects() instead.
 func (p PlacementPolicy) ReplicaNumberByIndex(i int) uint32 {
 	return p.replicas[i].GetCount()
 }
 
+// ReplicaDescriptor returns i-th replica descriptor. Index MUST be in range [0; NumberOfReplicas()).
+func (p PlacementPolicy) ReplicaDescriptor(i int) ReplicaDescriptor {
+	return ReplicaDescriptor{
+		m: p.replicas[i],
+	}
+}
+
 // SetContainerBackupFactor sets container backup factor: it controls how deep
 // FrostFS will search for nodes alternatives to include into container's nodes subset.
 //
@@ -217,6 +256,11 @@ func (s *Selector) SelectByBucketAttribute(bucket string) {
 	s.m.SetAttribute(bucket)
 }
 
+// SetClause sets the clause for the Selector.
+func (s *Selector) SetClause(clause netmap.Clause) {
+	s.m.SetClause(clause)
+}
+
 // SelectSame makes selection algorithm to select only nodes having the same values
 // of the bucket attribute.
 //
@@ -388,10 +432,14 @@ func (p PlacementPolicy) WriteStringTo(w io.StringWriter) (err error) {
 		c := p.replicas[i].GetCount()
 		s := p.replicas[i].GetSelector()
 
-		if s != "" {
+		if c != 0 {
-			_, err = w.WriteString(fmt.Sprintf("%sREP %d IN %s", delim, c, s))
-		} else {
 			_, err = w.WriteString(fmt.Sprintf("%sREP %d", delim, c))
+		} else {
+			ecx, ecy := p.replicas[i].GetECDataCount(), p.replicas[i].GetECParityCount()
+			_, err = w.WriteString(fmt.Sprintf("%sEC %d.%d", delim, ecx, ecy))
+		}
+		if s != "" {
+			_, err = w.WriteString(fmt.Sprintf(" IN %s", s))
 		}
 
 		if err != nil {
@@ -455,7 +503,7 @@ func (p PlacementPolicy) WriteStringTo(w io.StringWriter) (err error) {
 			return err
 		}
 
-		err = writeFilterStringTo(w, p.filters[i])
+		err = writeFilterStringTo(w, p.filters[i], false)
 		if err != nil {
 			return err
 		}
@@ -464,7 +512,7 @@ func (p PlacementPolicy) WriteStringTo(w io.StringWriter) (err error) {
 	return nil
 }
 
-func writeFilterStringTo(w io.StringWriter, f netmap.Filter) error {
+func writeFilterStringTo(w io.StringWriter, f netmap.Filter, mayNeedOuterBrackets bool) error {
 	var err error
 	var s string
 	op := f.GetOp()
@@ -489,7 +537,7 @@ func writeFilterStringTo(w io.StringWriter, f netmap.Filter) error {
 		if err != nil {
 			return err
 		}
-		err = writeFilterStringTo(w, inner[0])
+		err = writeFilterStringTo(w, inner[0], false)
 		if err != nil {
 			return err
 		}
@@ -498,6 +546,13 @@ func writeFilterStringTo(w io.StringWriter, f netmap.Filter) error {
 			return err
 		}
 	} else {
+		useBrackets := mayNeedOuterBrackets && op == netmap.OR && len(inner) > 1
+		if useBrackets {
+			_, err = w.WriteString("(")
+			if err != nil {
+				return err
+			}
+		}
 		for i := range inner {
 			if i != 0 {
 				_, err = w.WriteString(" " + op.String() + " ")
@@ -505,7 +560,13 @@ func writeFilterStringTo(w io.StringWriter, f netmap.Filter) error {
 					return err
 				}
 			}
-			err = writeFilterStringTo(w, inner[i])
+			err = writeFilterStringTo(w, inner[i], true)
+			if err != nil {
+				return err
+			}
+		}
+		if useBrackets {
+			_, err = w.WriteString(")")
 			if err != nil {
 				return err
 			}
@@ -612,6 +673,8 @@ var (
 		"make sure to pair REP and SELECT clauses: \"REP .. IN X\" + \"SELECT ... AS X\"")
 	// errRedundantSelector is returned for errors found by filters policy validator.
 	errRedundantFilter = errors.New("policy: found redundant filter")
+	// errECFewSelectors is returned when EC keyword is used without UNIQUE keyword.
+	errECFewSelectors = errors.New("policy: too few nodes to select")
 )
 
 type policyVisitor struct {
@@ -639,11 +702,18 @@ func (p *policyVisitor) VisitPolicy(ctx *parser.PolicyContext) any {
 
 	pl.unique = ctx.UNIQUE() != nil
 
-	repStmts := ctx.AllRepStmt()
+	stmts := ctx.GetChildren()
-	pl.replicas = make([]netmap.Replica, 0, len(repStmts))
+	for _, r := range stmts {
-
+		var res *netmap.Replica
-	for _, r := range repStmts {
+		var ok bool
-		res, ok := r.Accept(p).(*netmap.Replica)
+		switch r := r.(type) {
+		case parser.IRepStmtContext:
+			res, ok = r.Accept(p).(*netmap.Replica)
+		case parser.IEcStmtContext:
+			res, ok = r.Accept(p).(*netmap.Replica)
+		default:
+			continue
+		}
 		if !ok {
 			return nil
 		}
@@ -740,6 +810,28 @@ func (p *policyVisitor) VisitRepStmt(ctx *parser.RepStmtContext) any {
 	return rs
 }
 
+// VisitRepStmt implements parser.QueryVisitor interface.
+func (p *policyVisitor) VisitEcStmt(ctx *parser.EcStmtContext) any {
+	dataCount, err := strconv.ParseUint(ctx.GetData().GetText(), 10, 32)
+	if err != nil {
+		return p.reportError(errInvalidNumber)
+	}
+	parityCount, err := strconv.ParseUint(ctx.GetParity().GetText(), 10, 32)
+	if err != nil {
+		return p.reportError(errInvalidNumber)
+	}
+
+	rs := new(netmap.Replica)
+	rs.SetECDataCount(uint32(dataCount))
+	rs.SetECParityCount(uint32(parityCount))
+
+	if sel := ctx.GetSelector(); sel != nil {
+		rs.SetSelector(sel.GetText())
+	}
+
+	return rs
+}
+
 // VisitSelectStmt implements parser.QueryVisitor interface.
 func (p *policyVisitor) VisitSelectStmt(ctx *parser.SelectStmtContext) any {
 	res, err := strconv.ParseUint(ctx.GetCount().GetText(), 10, 32)
@@ -892,6 +984,14 @@ func validatePolicy(p PlacementPolicy) error {
 			if seenSelectors[selName] == nil {
 				return fmt.Errorf("%w: '%s'", errUnknownSelector, selName)
 			}
+
+			dataCount := p.replicas[i].GetECDataCount()
+			parityCount := p.replicas[i].GetECParityCount()
+			if dataCount != 0 || parityCount != 0 {
+				if c := seenSelectors[selName].GetCount(); c < dataCount+parityCount {
+					return fmt.Errorf("%w: %d < %d + %d", errECFewSelectors, c, dataCount, parityCount)
+				}
+			}
 		}
 	}
 
@@ -922,10 +1022,14 @@ func operationFromString(s string) (op netmap.Operation) {
 	return
 }
 
-// escapeString returns single quote wrapped string if it contains special
+// escapeString returns single quote wrapped string.
-// characters '-' and whitespace.
+// Wrapping rules must be kept in sync with QueryLexer.g4.
+// Currently only ASCII letters, digits and underscore can be parsed without quotes.
 func escapeString(s string) string {
-	if strings.ContainsAny(s, " -\t") {
+	for _, r := range s {
+		if 'a' <= r && r <= 'z' || 'A' <= r && r <= 'Z' || '0' <= r && r <= '9' || r == '_' {
+			continue
+		}
 		return "'" + s + "'"
 	}
 	return s

netmap/policy_decode_test.go

@@ -36,9 +36,16 @@ FILTER City EQ SPB AND SSD EQ true OR City EQ SPB AND Rating GE 5 AS SPBSSD`,
 SELECT 1 IN City FROM SPBSSD AS SPB
 FILTER NOT (NOT (City EQ SPB) AND SSD EQ true OR City EQ SPB AND Rating GE 5) AS SPBSSD`,
 
+		`REP 1 IN FNODE
+CBF 1
+SELECT 1 FROM F AS FNODE
+FILTER Node EQ '10.78.8.11' AS F`,
+
 		`UNIQUE
 REP 1
 REP 1`,
+		`EC 1.2 IN X
+SELECT 3 IN City FROM * AS X`,
 	}
 
 	var p PlacementPolicy

netmap/policy_test.go

@@ -1,6 +1,7 @@
 package netmap_test
 
 import (
+	"strings"
 	"testing"
 
 	. "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
@@ -29,6 +30,79 @@ func TestPlacementPolicyEncoding(t *testing.T) {
 	})
 }
 
+func TestPlacementPolicyWriteString(t *testing.T) {
+	testCases := []struct {
+		name   string
+		input  string
+		output string // If the output is empty, make it equal to input.
+	}{
+		{
+			name: "no compound operators",
+			input: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER Color EQ Red AS Color`,
+		},
+		{
+			name: "no brackets in single level same-operator chain",
+			input: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER Color EQ Red OR Color EQ Blue OR Color EQ Green AS Color`,
+		},
+		{
+			name: "no brackets aroung higher precedence op",
+			input: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER Color EQ Red OR Color EQ Blue AND Color NE Green AS Color`,
+		},
+		{
+			name: "no brackets aroung higher precedence op, even if present in the input",
+			input: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER Color EQ Red OR (Color EQ Blue AND Color NE Green) AS Color`,
+			output: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER Color EQ Red OR Color EQ Blue AND Color NE Green AS Color`,
+		},
+		{
+			name: "brackets aroung lower precedence op",
+			input: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER (Color EQ Red OR Color EQ Blue) AND Color NE Green AS Color`,
+		},
+		{
+			name: "no extra brackets for bracketed same-operator chain",
+			input: `REP 1
+CBF 1
+SELECT 1 FROM Color
+FILTER (Color EQ Red OR Color EQ Blue OR Color EQ Yellow) AND Color NE Green AS Color`,
+		},
+	}
+
+	for _, tc := range testCases {
+		var p PlacementPolicy
+		require.NoError(t, p.DecodeString(tc.input))
+
+		var sb strings.Builder
+		require.NoError(t, p.WriteStringTo(&sb))
+
+		if tc.output == "" {
+			require.Equal(t, tc.input, sb.String())
+		} else {
+			require.Equal(t, tc.output, sb.String())
+
+			var p1 PlacementPolicy
+			require.NoError(t, p1.DecodeString(tc.output))
+			require.Equal(t, p, p1)
+		}
+	}
+}
+
 func TestDecodeSelectFilterExpr(t *testing.T) {
 	for _, s := range []string{
 		"SELECT 1 FROM *",

netmap/selector_test.go

@@ -99,10 +99,12 @@ func BenchmarkPolicyHRWType(b *testing.B) {
 	p := newPlacementPolicy(1,
 		[]ReplicaDescriptor{
 			newReplica(1, "loc1"),
-			newReplica(1, "loc2")},
+			newReplica(1, "loc2"),
+		},
 		[]Selector{
 			newSelector("loc1", "Location", 1, "loc1", (*Selector).SelectSame),
-			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame)},
+			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame),
+		},
 		[]Filter{
 			newFilter("loc1", "Location", "Shanghai", netmap.EQ),
 			newFilter("loc2", "Location", "Shanghai", netmap.NE),
@@ -144,10 +146,12 @@ func TestPlacementPolicy_DeterministicOrder(t *testing.T) {
 	p := newPlacementPolicy(1,
 		[]ReplicaDescriptor{
 			newReplica(1, "loc1"),
-			newReplica(1, "loc2")},
+			newReplica(1, "loc2"),
+		},
 		[]Selector{
 			newSelector("loc1", "Location", 1, "loc1", (*Selector).SelectSame),
-			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame)},
+			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame),
+		},
 		[]Filter{
 			newFilter("loc1", "Location", "Shanghai", netmap.EQ),
 			newFilter("loc2", "Location", "Shanghai", netmap.NE),

netmap/yml_test.go

@@ -1,6 +1,7 @@
 package netmap
 
 import (
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"os"
@@ -8,24 +9,41 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
+	"gopkg.in/yaml.v3"
 )
 
 // TestCase represents collection of placement policy tests for a single node set.
 type TestCase struct {
-	Name  string     `json:"name"`
+	Name  string     `json:"name" yaml:"name"`
-	Nodes []NodeInfo `json:"nodes"`
+	Nodes []NodeInfo `json:"nodes" yaml:"nodes"`
 	Tests map[string]struct {
-		Policy    PlacementPolicy `json:"policy"`
+		Policy    PlacementPolicy
-		Pivot     []byte          `json:"pivot,omitempty"`
+		Pivot     Base64
-		Result    [][]int         `json:"result,omitempty"`
+		Result    [][]int `json:"result,omitempty" yaml:"result,omitempty"`
-		Error     string          `json:"error,omitempty"`
+		Error     string  `json:"error,omitempty" yaml:"error,omitempty"`
 		Placement struct {
-			Pivot  []byte
+			Pivot  Base64  `json:"pivot" yaml:"pivot"`
-			Result [][]int
+			Result [][]int `json:"result,omitempty" yaml:"result,omitempty"`
-		} `json:"placement,omitempty"`
+		} `json:"placement,omitempty" yaml:"placement,omitempty"`
 	}
 }
 
+// Base64 is a type that will hold the decoded Base64 data.
+type Base64 []byte
+
+func (b *Base64) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var base64Str string
+	if err := unmarshal(&base64Str); err != nil {
+		return err
+	}
+	decodedBytes, err := base64.StdEncoding.DecodeString(base64Str)
+	if err != nil {
+		return err
+	}
+	*b = decodedBytes
+	return nil
+}
+
 var _, _ json.Unmarshaler = new(NodeInfo), new(PlacementPolicy)
 
 func compareNodes(t testing.TB, expected [][]int, nodes nodes, actual [][]NodeInfo) {
@@ -39,7 +57,7 @@ func compareNodes(t testing.TB, expected [][]int, nodes nodes, actual [][]NodeIn
 }
 
 func TestPlacementPolicy_Interopability(t *testing.T) {
-	const testsDir = "./json_tests"
+	const testsDir = "./yml_tests"
 
 	f, err := os.Open(testsDir)
 	require.NoError(t, err)
@@ -53,7 +71,7 @@ func TestPlacementPolicy_Interopability(t *testing.T) {
 		require.NoError(t, err)
 
 		var tc TestCase
-		require.NoError(t, json.Unmarshal(bs, &tc), "cannot unmarshal %s", ds[i].Name())
+		require.NoError(t, yaml.Unmarshal(bs, &tc), "cannot unmarshal %s", ds[i].Name())
 
 		srcNodes := make([]NodeInfo, len(tc.Nodes))
 		copy(srcNodes, tc.Nodes)
@@ -88,7 +106,7 @@ func TestPlacementPolicy_Interopability(t *testing.T) {
 }
 
 func BenchmarkPlacementPolicyInteropability(b *testing.B) {
-	const testsDir = "./json_tests"
+	const testsDir = "./yml_tests"
 
 	f, err := os.Open(testsDir)
 	require.NoError(b, err)
@@ -101,7 +119,7 @@ func BenchmarkPlacementPolicyInteropability(b *testing.B) {
 		require.NoError(b, err)
 
 		var tc TestCase
-		require.NoError(b, json.Unmarshal(bs, &tc), "cannot unmarshal %s", ds[i].Name())
+		require.NoError(b, yaml.Unmarshal(bs, &tc), "cannot unmarshal %s", ds[i].Name())
 
 		b.Run(tc.Name, func(b *testing.B) {
 			var nm NetMap
@@ -140,12 +158,12 @@ func BenchmarkPlacementPolicyInteropability(b *testing.B) {
 }
 
 func BenchmarkManySelects(b *testing.B) {
-	testsFile := filepath.Join("json_tests", "many_selects.json")
+	testsFile := filepath.Join("yml_tests", "many_selects.yml")
 	bs, err := os.ReadFile(testsFile)
 	require.NoError(b, err)
 
 	var tc TestCase
-	require.NoError(b, json.Unmarshal(bs, &tc))
+	require.NoError(b, yaml.Unmarshal(bs, &tc))
 	tt, ok := tc.Tests["Select"]
 	require.True(b, ok)
 

netmap/yml_tests/cbf_default.yml

@@ -0,0 +1,48 @@
+name: default CBF is 3
+nodes:
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: RU
+      - key: City
+        value: St.Petersburg
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: RU
+      - key: City
+        value: Moscow
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: DE
+      - key: City
+        value: Berlin
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: FR
+      - key: City
+        value: Paris
+tests:
+  set default CBF:
+    policy:
+      replicas:
+        - count: 1
+          selector: EU
+      containerBackupFactor: 0
+      selectors:
+        - name: EU
+          count: 1
+          clause: SAME
+          attribute: Location
+          filter: '*'
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2

netmap/yml_tests/cbf_minimal.yml

@@ -0,0 +1,52 @@
+name: Real node count multiplier is in range [1, specified CBF]
+nodes:
+  - attributes:
+      - key: ID
+        value: '1'
+      - key: Country
+        value: DE
+  - attributes:
+      - key: ID
+        value: '2'
+      - key: Country
+        value: DE
+  - attributes:
+      - key: ID
+        value: '3'
+      - key: Country
+        value: DE
+tests:
+  select 2, CBF is 2:
+    policy:
+      replicas:
+        - count: 1
+          selector: X
+      containerBackupFactor: 2
+      selectors:
+        - name: X
+          count: 2
+          clause: SAME
+          attribute: Country
+          filter: '*'
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2
+  select 3, CBF is 2:
+    policy:
+      replicas:
+        - count: 1
+          selector: X
+      containerBackupFactor: 2
+      selectors:
+        - name: X
+          count: 3
+          clause: SAME
+          attribute: Country
+          filter: '*'
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2

netmap/yml_tests/cbf_requirements.yml

@@ -0,0 +1,82 @@
+name: CBF requirements
+nodes:
+  - attributes:
+      - key: ID
+        value: '1'
+      - key: Attr
+        value: Same
+  - attributes:
+      - key: ID
+        value: '2'
+      - key: Attr
+        value: Same
+  - attributes:
+      - key: ID
+        value: '3'
+      - key: Attr
+        value: Same
+  - attributes:
+      - key: ID
+        value: '4'
+      - key: Attr
+        value: Same
+tests:
+  default CBF, no selector:
+    policy:
+      replicas:
+        - count: 2
+      containerBackupFactor: 0
+      selectors: []
+      filters: []
+    result:
+      - - 0
+        - 2
+        - 1
+        - 3
+  explicit CBF, no selector:
+    policy:
+      replicas:
+        - count: 2
+      containerBackupFactor: 3
+      selectors: []
+      filters: []
+    result:
+      - - 0
+        - 2
+        - 1
+        - 3
+  select distinct, weak CBF:
+    policy:
+      replicas:
+        - count: 2
+          selector: X
+      containerBackupFactor: 3
+      selectors:
+        - name: X
+          count: 2
+          clause: DISTINCT
+          filter: '*'
+      filters: []
+    result:
+      - - 0
+        - 2
+        - 1
+        - 3
+  select same, weak CBF:
+    policy:
+      replicas:
+        - count: 2
+          selector: X
+      containerBackupFactor: 3
+      selectors:
+        - name: X
+          count: 2
+          clause: SAME
+          attribute: Attr
+          filter: '*'
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2
+        - 3

netmap/yml_tests/filter_complex.yml

@@ -0,0 +1,210 @@
+name: compound filter
+nodes:
+  - attributes:
+      - key: Storage
+        value: SSD
+      - key: Rating
+        value: '10'
+      - key: IntField
+        value: '100'
+      - key: Param
+        value: Value1
+tests:
+  good:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: StorageSSD
+          key: Storage
+          op: EQ
+          value: SSD
+          filters: []
+        - name: GoodRating
+          key: Rating
+          op: GE
+          value: '4'
+          filters: []
+        - name: Main
+          op: AND
+          filters:
+            - name: StorageSSD
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              key: IntField
+              op: LT
+              value: '123'
+              filters: []
+            - name: GoodRating
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - op: OR
+              filters:
+                - key: Param
+                  op: EQ
+                  value: Value1
+                  filters: []
+                - key: Param
+                  op: EQ
+                  value: Value2
+                  filters: []
+    result:
+      - - 0
+  bad storage type:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: StorageSSD
+          key: Storage
+          op: EQ
+          value: HDD
+          filters: []
+        - name: GoodRating
+          key: Rating
+          op: GE
+          value: '4'
+          filters: []
+        - name: Main
+          op: AND
+          filters:
+            - name: StorageSSD
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              key: IntField
+              op: LT
+              value: '123'
+              filters: []
+            - name: GoodRating
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              op: OR
+              filters:
+                - name: ''
+                  key: Param
+                  op: EQ
+                  value: Value1
+                  filters: []
+                - name: ''
+                  key: Param
+                  op: EQ
+                  value: Value2
+                  filters: []
+    error: not enough nodes
+  bad rating:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: StorageSSD
+          key: Storage
+          op: EQ
+          value: SSD
+          filters: []
+        - name: GoodRating
+          key: Rating
+          op: GE
+          value: '15'
+          filters: []
+        - name: Main
+          op: AND
+          filters:
+            - name: StorageSSD
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              key: IntField
+              op: LT
+              value: '123'
+              filters: []
+            - name: GoodRating
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              op: OR
+              filters:
+                - name: ''
+                  key: Param
+                  op: EQ
+                  value: Value1
+                  filters: []
+                - name: ''
+                  key: Param
+                  op: EQ
+                  value: Value2
+                  filters: []
+    error: not enough nodes
+  bad param:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: StorageSSD
+          key: Storage
+          op: EQ
+          value: SSD
+          filters: []
+        - name: GoodRating
+          key: Rating
+          op: GE
+          value: '4'
+          filters: []
+        - name: Main
+          op: AND
+          filters:
+            - name: StorageSSD
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              key: IntField
+              op: LT
+              value: '123'
+              filters: []
+            - name: GoodRating
+              op: OPERATION_UNSPECIFIED
+              filters: []
+            - name: ''
+              op: OR
+              filters:
+                - name: ''
+                  key: Param
+                  op: EQ
+                  value: Value0
+                  filters: []
+                - name: ''
+                  key: Param
+                  op: EQ
+                  value: Value2
+                  filters: []
+    error: not enough nodes

netmap/yml_tests/filter_invalid_integer.yml

@@ -0,0 +1,45 @@
+name: invalid integer field
+nodes:
+  - attributes:
+      - key: IntegerField
+        value: 'true'
+  - attributes:
+      - key: IntegerField
+        value: str
+tests:
+  empty string is not casted to 0:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: IntegerField
+          op: LE
+          value: '8'
+          filters: []
+    error: not enough nodes
+  non-empty string is not casted to a number:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: IntegerField
+          op: GE
+          value: '0'
+          filters: []
+    error: not enough nodes

netmap/yml_tests/filter_simple.yml

@@ -0,0 +1,230 @@
+name: single-op filters
+nodes:
+  - attributes:
+      - key: Rating
+        value: '4'
+      - key: Country
+        value: Germany
+tests:
+  GE true:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: GE
+          value: '4'
+          filters: []
+    result:
+      - - 0
+  GE false:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: GE
+          value: '5'
+          filters: []
+    error: not enough nodes
+  GT true:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: GT
+          value: '3'
+          filters: []
+    result:
+      - - 0
+  GT false:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: GT
+          value: '4'
+          filters: []
+    error: not enough nodes
+  LE true:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: LE
+          value: '4'
+          filters: []
+    result:
+      - - 0
+  LE false:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: LE
+          value: '3'
+          filters: []
+    error: not enough nodes
+  LT true:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: LT
+          value: '5'
+          filters: []
+    result:
+      - - 0
+  LT false:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Rating
+          op: LT
+          value: '4'
+          filters: []
+    error: not enough nodes
+  EQ true:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Country
+          op: EQ
+          value: Germany
+          filters: []
+    result:
+      - - 0
+  EQ false:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Country
+          op: EQ
+          value: China
+          filters: []
+    error: not enough nodes
+  NE true:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Country
+          op: NE
+          value: France
+          filters: []
+    result:
+      - - 0
+  NE false:
+    policy:
+      replicas:
+        - count: 1
+          selector: S
+      containerBackupFactor: 1
+      selectors:
+        - name: S
+          count: 1
+          clause: DISTINCT
+          filter: Main
+      filters:
+        - name: Main
+          key: Country
+          op: NE
+          value: Germany
+          filters: []
+    error: not enough nodes

netmap/yml_tests/hrw_sort.yml

@@ -0,0 +1,118 @@
+name: HRW ordering
+nodes:
+  - attributes:
+      - key: Country
+        value: Germany
+      - key: Price
+        value: '2'
+      - key: Capacity
+        value: '10000'
+  - attributes:
+      - key: Country
+        value: Germany
+      - key: Price
+        value: '4'
+      - key: Capacity
+        value: '1'
+  - attributes:
+      - key: Country
+        value: France
+      - key: Price
+        value: '3'
+      - key: Capacity
+        value: '10'
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Price
+        value: '2'
+      - key: Capacity
+        value: '10000'
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Price
+        value: '1'
+      - key: Capacity
+        value: '10000'
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Capacity
+        value: '10000'
+  - attributes:
+      - key: Country
+        value: France
+      - key: Price
+        value: '100'
+      - key: Capacity
+        value: '1'
+  - attributes:
+      - key: Country
+        value: France
+      - key: Price
+        value: '7'
+      - key: Capacity
+        value: '10000'
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Price
+        value: '2'
+      - key: Capacity
+        value: '1'
+tests:
+  select 3 nodes in 3 distinct countries, same placement:
+    policy:
+      replicas:
+        - count: 1
+          selector: Main
+      containerBackupFactor: 1
+      selectors:
+        - name: Main
+          count: 3
+          clause: DISTINCT
+          attribute: Country
+          filter: '*'
+      filters: []
+    pivot: Y29udGFpbmVySUQ=
+    result:
+      - - 5
+        - 0
+        - 7
+    placement:
+      pivot: b2JqZWN0SUQ=
+      result:
+        - - 5
+          - 0
+          - 7
+  select 6 nodes in 3 distinct countries, different placement:
+    policy:
+      replicas:
+        - count: 1
+          selector: Main
+      containerBackupFactor: 2
+      selectors:
+        - name: Main
+          count: 3
+          clause: DISTINCT
+          attribute: Country
+          filter: '*'
+      filters: []
+    pivot: Y29udGFpbmVySUQ=
+    result:
+      - - 5
+        - 4
+        - 0
+        - 1
+        - 7
+        - 2
+    placement:
+      pivot: b2JqZWN0SUQ=
+      result:
+        - - 5
+          - 4
+          - 0
+          - 7
+          - 2
+          - 1

netmap/yml_tests/issue213.yml

@@ -0,0 +1,52 @@
+name: unnamed selector (nspcc-dev/neofs-api-go#213)
+nodes:
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: Russia
+      - key: City
+        value: Moscow
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: Russia
+      - key: City
+        value: Saint-Petersburg
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: Sweden
+      - key: City
+        value: Stockholm
+  - attributes:
+      - key: Location
+        value: Europe
+      - key: Country
+        value: Finalnd
+      - key: City
+        value: Helsinki
+tests:
+  test:
+    policy:
+      replicas:
+        - count: 4
+      containerBackupFactor: 1
+      selectors:
+        - name: ''
+          count: 4
+          clause: DISTINCT
+          filter: LOC_EU
+      filters:
+        - name: LOC_EU
+          key: Location
+          op: EQ
+          value: Europe
+          filters: []
+    result:
+      - - 0
+        - 1
+        - 2
+        - 3

netmap/yml_tests/many_selects.yml

@@ -0,0 +1,141 @@
+name: single-op filters
+nodes:
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Rating
+        value: '1'
+      - key: City
+        value: SPB
+  - attributes:
+      - key: Country
+        value: Germany
+      - key: Rating
+        value: '5'
+      - key: City
+        value: Berlin
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Rating
+        value: '6'
+      - key: City
+        value: Moscow
+  - attributes:
+      - key: Country
+        value: France
+      - key: Rating
+        value: '4'
+      - key: City
+        value: Paris
+  - attributes:
+      - key: Country
+        value: France
+      - key: Rating
+        value: '1'
+      - key: City
+        value: Lyon
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Rating
+        value: '5'
+      - key: City
+        value: SPB
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Rating
+        value: '7'
+      - key: City
+        value: Moscow
+  - attributes:
+      - key: Country
+        value: Germany
+      - key: Rating
+        value: '3'
+      - key: City
+        value: Darmstadt
+  - attributes:
+      - key: Country
+        value: Germany
+      - key: Rating
+        value: '7'
+      - key: City
+        value: Frankfurt
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Rating
+        value: '9'
+      - key: City
+        value: SPB
+  - attributes:
+      - key: Country
+        value: Russia
+      - key: Rating
+        value: '9'
+      - key: City
+        value: SPB
+tests:
+  Select:
+    policy:
+      replicas:
+        - count: 1
+          selector: SameRU
+        - count: 1
+          selector: DistinctRU
+        - count: 1
+          selector: Good
+        - count: 1
+          selector: Main
+      containerBackupFactor: 2
+      selectors:
+        - name: SameRU
+          count: 2
+          clause: SAME
+          attribute: City
+          filter: FromRU
+        - name: DistinctRU
+          count: 2
+          clause: DISTINCT
+          attribute: City
+          filter: FromRU
+        - name: Good
+          count: 2
+          clause: DISTINCT
+          attribute: Country
+          filter: Good
+        - name: Main
+          count: 3
+          clause: DISTINCT
+          attribute: Country
+          filter: '*'
+      filters:
+        - name: FromRU
+          key: Country
+          op: EQ
+          value: Russia
+        - name: Good
+          key: Rating
+          op: GE
+          value: '4'
+    result:
+      - - 0
+        - 5
+        - 9
+        - 10
+      - - 2
+        - 6
+        - 0
+        - 5
+      - - 1
+        - 8
+        - 2
+        - 5
+      - - 3
+        - 4
+        - 1
+        - 7
+        - 0
+        - 2

netmap/yml_tests/multiple_rep.yml

@@ -0,0 +1,46 @@
+name: multiple replicas (#215)
+nodes:
+  - attributes:
+      - key: City
+        value: Saint-Petersburg
+  - attributes:
+      - key: City
+        value: Moscow
+  - attributes:
+      - key: City
+        value: Berlin
+  - attributes:
+      - key: City
+        value: Paris
+tests:
+  test:
+    policy:
+      replicas:
+        - count: 1
+          selector: LOC_SPB_PLACE
+        - count: 1
+          selector: LOC_MSK_PLACE
+      containerBackupFactor: 1
+      selectors:
+        - name: LOC_SPB_PLACE
+          count: 1
+          clause: CLAUSE_UNSPECIFIED
+          filter: LOC_SPB
+        - name: LOC_MSK_PLACE
+          count: 1
+          clause: CLAUSE_UNSPECIFIED
+          filter: LOC_MSK
+      filters:
+        - name: LOC_SPB
+          key: City
+          op: EQ
+          value: Saint-Petersburg
+          filters: []
+        - name: LOC_MSK
+          key: City
+          op: EQ
+          value: Moscow
+          filters: []
+    result:
+      - - 0
+      - - 1

netmap/yml_tests/multiple_rep_asymmetric.yml

@@ -0,0 +1,162 @@
+name: multiple REP, asymmetric
+nodes:
+  - attributes:
+      - key: ID
+        value: '1'
+      - key: Country
+        value: RU
+      - key: City
+        value: St.Petersburg
+      - key: SSD
+        value: '0'
+  - attributes:
+      - key: ID
+        value: '2'
+      - key: Country
+        value: RU
+      - key: City
+        value: St.Petersburg
+      - key: SSD
+        value: '1'
+  - attributes:
+      - key: ID
+        value: '3'
+      - key: Country
+        value: RU
+      - key: City
+        value: Moscow
+      - key: SSD
+        value: '1'
+  - attributes:
+      - key: ID
+        value: '4'
+      - key: Country
+        value: RU
+      - key: City
+        value: Moscow
+      - key: SSD
+        value: '1'
+  - attributes:
+      - key: ID
+        value: '5'
+      - key: Country
+        value: RU
+      - key: City
+        value: St.Petersburg
+      - key: SSD
+        value: '1'
+  - attributes:
+      - key: ID
+        value: '6'
+      - key: Continent
+        value: NA
+      - key: City
+        value: NewYork
+  - attributes:
+      - key: ID
+        value: '7'
+      - key: Continent
+        value: AF
+      - key: City
+        value: Cairo
+  - attributes:
+      - key: ID
+        value: '8'
+      - key: Continent
+        value: AF
+      - key: City
+        value: Cairo
+  - attributes:
+      - key: ID
+        value: '9'
+      - key: Continent
+        value: SA
+      - key: City
+        value: Lima
+  - attributes:
+      - key: ID
+        value: '10'
+      - key: Continent
+        value: AF
+      - key: City
+        value: Cairo
+  - attributes:
+      - key: ID
+        value: '11'
+      - key: Continent
+        value: NA
+      - key: City
+        value: NewYork
+  - attributes:
+      - key: ID
+        value: '12'
+      - key: Continent
+        value: NA
+      - key: City
+        value: LosAngeles
+  - attributes:
+      - key: ID
+        value: '13'
+      - key: Continent
+        value: SA
+      - key: City
+        value: Lima
+tests:
+  test:
+    policy:
+      replicas:
+        - count: 1
+          selector: SPB
+        - count: 2
+          selector: Americas
+      containerBackupFactor: 2
+      selectors:
+        - name: SPB
+          count: 1
+          clause: SAME
+          attribute: City
+          filter: SPBSSD
+        - name: Americas
+          count: 2
+          clause: DISTINCT
+          attribute: City
+          filter: Americas
+      filters:
+        - name: SPBSSD
+          op: AND
+          filters:
+            - name: ''
+              key: Country
+              op: EQ
+              value: RU
+              filters: []
+            - name: ''
+              key: City
+              op: EQ
+              value: St.Petersburg
+              filters: []
+            - name: ''
+              key: SSD
+              op: EQ
+              value: '1'
+              filters: []
+        - name: Americas
+          op: OR
+          filters:
+            - name: ''
+              key: Continent
+              op: EQ
+              value: NA
+              filters: []
+            - name: ''
+              key: Continent
+              op: EQ
+              value: SA
+              filters: []
+    result:
+      - - 1
+        - 4
+      - - 8
+        - 12
+        - 5
+        - 10

netmap/yml_tests/non_strict.yml

@@ -0,0 +1,52 @@
+name: non-strict selections
+comment: These test specify loose selection behaviour, to allow fetching already PUT
+  objects even when there is not enough nodes to select from.
+nodes:
+  - attributes:
+      - key: Country
+        value: Russia
+  - attributes:
+      - key: Country
+        value: Germany
+  - attributes: []
+tests:
+  not enough nodes (backup factor):
+    policy:
+      replicas:
+        - count: 1
+          selector: MyStore
+      containerBackupFactor: 2
+      selectors:
+        - name: MyStore
+          count: 2
+          clause: DISTINCT
+          attribute: Country
+          filter: FromRU
+      filters:
+        - name: FromRU
+          key: Country
+          op: EQ
+          value: Russia
+          filters: []
+    result:
+      - - 0
+  not enough nodes (buckets):
+    policy:
+      replicas:
+        - count: 1
+          selector: MyStore
+      containerBackupFactor: 1
+      selectors:
+        - name: MyStore
+          count: 2
+          clause: DISTINCT
+          attribute: Country
+          filter: FromRU
+      filters:
+        - name: FromRU
+          key: Country
+          op: EQ
+          value: Russia
+          filters: []
+    result:
+      - - 0

netmap/yml_tests/rep_only.yml

@@ -0,0 +1,66 @@
+name: REP X
+nodes:
+  - publicKey: ''
+    addresses: []
+    attributes:
+      - key: City
+        value: Saint-Petersburg
+        parents: []
+    state: UNSPECIFIED
+  - publicKey: ''
+    addresses: []
+    attributes:
+      - key: City
+        value: Moscow
+        parents: []
+    state: UNSPECIFIED
+  - publicKey: ''
+    addresses: []
+    attributes:
+      - key: City
+        value: Berlin
+        parents: []
+    state: UNSPECIFIED
+  - publicKey: ''
+    addresses: []
+    attributes:
+      - key: City
+        value: Paris
+        parents: []
+    state: UNSPECIFIED
+tests:
+  REP 1:
+    policy:
+      replicas:
+        - count: 1
+      containerBackupFactor: 0
+      selectors: []
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2
+  REP 3:
+    policy:
+      replicas:
+        - count: 3
+      containerBackupFactor: 0
+      selectors: []
+      filters: []
+    result:
+      - - 0
+        - 3
+        - 1
+        - 2
+  REP 5:
+    policy:
+      replicas:
+        - count: 5
+      containerBackupFactor: 0
+      selectors: []
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2
+        - 3

netmap/yml_tests/select_no_attribute.yml

@@ -0,0 +1,56 @@
+name: select with unspecified attribute
+nodes:
+  - attributes:
+      - key: ID
+        value: '1'
+      - key: Country
+        value: RU
+      - key: City
+        value: St.Petersburg
+      - key: SSD
+        value: '0'
+  - attributes:
+      - key: ID
+        value: '2'
+      - key: Country
+        value: RU
+      - key: City
+        value: St.Petersburg
+      - key: SSD
+        value: '1'
+  - attributes:
+      - key: ID
+        value: '3'
+      - key: Country
+        value: RU
+      - key: City
+        value: Moscow
+      - key: SSD
+        value: '1'
+  - attributes:
+      - key: ID
+        value: '4'
+      - key: Country
+        value: RU
+      - key: City
+        value: Moscow
+      - key: SSD
+        value: '1'
+tests:
+  test:
+    policy:
+      replicas:
+        - count: 1
+          selector: X
+      containerBackupFactor: 1
+      selectors:
+        - name: X
+          count: 4
+          clause: DISTINCT
+          filter: '*'
+      filters: []
+    result:
+      - - 0
+        - 1
+        - 2
+        - 3

netmap/yml_tests/selector_invalid.yml

@@ -0,0 +1,48 @@
+name: invalid selections
+nodes:
+  - attributes:
+      - key: Country
+        value: Russia
+  - attributes:
+      - key: Country
+        value: Germany
+  - attributes: []
+tests:
+  missing filter:
+    policy:
+      replicas:
+        - count: 1
+          selector: MyStore
+      containerBackupFactor: 1
+      selectors:
+        - name: MyStore
+          count: 1
+          clause: DISTINCT
+          attribute: Country
+          filter: FromNL
+      filters:
+        - name: FromRU
+          key: Country
+          op: EQ
+          value: Russia
+          filters: []
+    error: filter not found
+  not enough nodes (filter results in empty set):
+    policy:
+      replicas:
+        - count: 1
+          selector: MyStore
+      containerBackupFactor: 2
+      selectors:
+        - name: MyStore
+          count: 2
+          clause: DISTINCT
+          attribute: Country
+          filter: FromMoon
+      filters:
+        - name: FromMoon
+          key: Country
+          op: EQ
+          value: Moon
+          filters: []
+    error: not enough nodes

netmap/yml_unmarshal.go

@@ -0,0 +1,142 @@
+package netmap
+
+import (
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap"
+)
+
+type tempPlacementPolicy struct {
+	BackupFactor uint32         `yaml:"containerBackupFactor"`
+	Filters      []tempFilter   `yaml:"filters"`
+	Selectors    []tempSelector `yaml:"selectors"`
+	Replicas     []tempReplica  `yaml:"replicas"`
+	Unique       bool           `yaml:"unique"`
+}
+
+type tempFilter struct {
+	Name    string       `yaml:"name"`
+	Key     string       `yaml:"key"`
+	Op      string       `yaml:"op"`
+	Value   string       `yaml:"value"`
+	Filters []tempFilter `yaml:"filters"`
+}
+
+type tempSelector struct {
+	Name      string `yaml:"name"`
+	Count     uint32 `yaml:"count"`
+	Clause    string `yaml:"clause"`
+	Attribute string `yaml:"attribute"`
+	Filter    string `yaml:"filter"`
+}
+
+type tempReplica struct {
+	Count    uint32 `yaml:"count"`
+	Selector string `yaml:"selector"`
+}
+
+func convertNFilters(temp []tempFilter) []netmap.Filter {
+	var filters []netmap.Filter
+	for _, tf := range temp {
+		filters = append(filters, convertNFilter(tf))
+	}
+	return filters
+}
+
+var stringToOperationMap = map[string]netmap.Operation{
+	"EQ":  netmap.EQ,
+	"NE":  netmap.NE,
+	"GT":  netmap.GT,
+	"GE":  netmap.GE,
+	"LT":  netmap.LT,
+	"LE":  netmap.LE,
+	"OR":  netmap.OR,
+	"AND": netmap.AND,
+	"NOT": netmap.NOT,
+}
+
+func convertStringToOperation(opStr string) netmap.Operation {
+	opStr = strings.ToUpper(opStr)
+	if op, exists := stringToOperationMap[opStr]; exists {
+		return op
+	}
+	return netmap.UnspecifiedOperation
+}
+
+func convertStringToClause(clauseStr string) netmap.Clause {
+	switch strings.ToUpper(clauseStr) {
+	case "DISTINCT":
+		return netmap.Distinct
+	default:
+		return netmap.Same
+	}
+}
+
+func convertNFilter(temp tempFilter) netmap.Filter {
+	filter := netmap.Filter{}
+	filter.SetKey(temp.Key)
+	filter.SetName(temp.Name)
+	filter.SetValue(temp.Value)
+	filter.SetOp(convertStringToOperation(temp.Op))
+
+	if temp.Filters != nil {
+		filter.SetFilters(convertNFilters(temp.Filters))
+	}
+	return filter
+}
+
+func (p *PlacementPolicy) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var temp tempPlacementPolicy
+	if err := unmarshal(&temp); err != nil {
+		return err
+	}
+
+	for _, ts := range temp.Filters {
+		netmapFilters := convertNFilter(ts)
+		p.AddFilters(Filter{m: netmapFilters})
+	}
+
+	for _, ts := range temp.Selectors {
+		selector := Selector{}
+		selector.SetName(ts.Name)
+		selector.SetNumberOfNodes(ts.Count)
+		selector.SetClause(convertStringToClause(ts.Clause))
+		selector.SelectByBucketAttribute(ts.Attribute)
+		selector.SetFilterName(ts.Filter)
+		p.AddSelectors(selector)
+	}
+
+	for _, tr := range temp.Replicas {
+		replica := ReplicaDescriptor{}
+		replica.SetSelectorName(tr.Selector)
+		replica.m.SetCount(tr.Count)
+		p.AddReplicas(replica)
+	}
+
+	p.SetContainerBackupFactor(temp.BackupFactor)
+	p.SetUnique(temp.Unique)
+
+	return nil
+}
+
+type Attribute struct {
+	Key   string `yaml:"key"`
+	Value string `yaml:"value"`
+}
+
+type tempNode struct {
+	Attributes []Attribute `yaml:"attributes"`
+}
+
+func (x *NodeInfo) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var temp tempNode
+	if err := unmarshal(&temp); err != nil {
+		return err
+	}
+
+	for _, atr := range temp.Attributes {
+		x.SetAttribute(atr.Key, atr.Value)
+	}
+
+	return nil
+}

object/ecinfo.go

@@ -0,0 +1,69 @@
+package object
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+)
+
+type ECChunk object.ECChunk
+
+func (c *ECChunk) SetID(id oid.ID) {
+	objV2 := new(refs.ObjectID)
+	id.WriteToV2(objV2)
+	c.ID = *objV2
+}
+
+// ToV2 converts ECChunk to v2 ECChunk message.
+//
+// Nil ECChunk converts to nil.
+func (c *ECChunk) ToV2() *object.ECChunk {
+	return (*object.ECChunk)(c)
+}
+
+func NewECChunkFromV2(v2 *object.ECChunk) *ECChunk {
+	return (*ECChunk)(v2)
+}
+
+type ECInfo object.ECInfo
+
+// NewECInfoFromV2 wraps v2 ECInfo message to ECInfo.
+//
+// Nil object.ECInfo converts to nil.
+func NewECInfoFromV2(v2 *object.ECInfo) *ECInfo {
+	return (*ECInfo)(v2)
+}
+
+// NewECInfo creates and initializes blank ECInfo.
+func NewECInfo() *ECInfo {
+	return NewECInfoFromV2(new(object.ECInfo))
+}
+
+// ToV2 converts ECInfo to v2 ECInfo message.
+//
+// Nil ECInfo converts to nil.
+func (s *ECInfo) ToV2() *object.ECInfo {
+	return (*object.ECInfo)(s)
+}
+
+func (s *ECInfo) Marshal() ([]byte, error) {
+	return (*object.ECInfo)(s).StableMarshal(nil), nil
+}
+
+func (s *ECInfo) Unmarshal(data []byte) error {
+	return (*object.ECInfo)(s).Unmarshal(data)
+}
+
+// MarshalJSON implements json.Marshaler.
+func (s *ECInfo) MarshalJSON() ([]byte, error) {
+	return (*object.ECInfo)(s).MarshalJSON()
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (s *ECInfo) UnmarshalJSON(data []byte) error {
+	return (*object.ECInfo)(s).UnmarshalJSON(data)
+}
+
+func (s *ECInfo) AddChunk(chunk ECChunk) {
+	s.Chunks = append(s.Chunks, *chunk.ToV2())
+}

object/erasure_code.go

@@ -0,0 +1,121 @@
+package object
+
+import (
+	"errors"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
+	refs "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+)
+
+// ECHeader represents erasure coding header.
+type ECHeader struct {
+	parent       oid.ID
+	index        uint32
+	total        uint32
+	header       []byte
+	headerLength uint32
+}
+
+// NewECHeader constructs new erasure coding header.
+func NewECHeader(parent oid.ID, index, total uint32, header []byte, headerLength uint32) *ECHeader {
+	return &ECHeader{
+		parent:       parent,
+		index:        index,
+		total:        total,
+		header:       header,
+		headerLength: headerLength,
+	}
+}
+
+// WriteToV2 converts SDK structure to v2-api one.
+func (e *ECHeader) WriteToV2(h *object.ECHeader) {
+	var parent refs.ObjectID
+	e.parent.WriteToV2(&parent)
+	h.Parent = &parent
+	h.Index = e.index
+	h.Total = e.total
+	h.Header = e.header
+	h.HeaderLength = e.headerLength
+}
+
+// ReadFromV2 converts v2-api structure to SDK one.
+func (e *ECHeader) ReadFromV2(h *object.ECHeader) error {
+	if h == nil {
+		return nil
+	}
+	if h.Parent == nil {
+		return errors.New("empty parent")
+	}
+
+	_ = e.parent.ReadFromV2(*h.Parent)
+	e.index = h.Index
+	e.total = h.Total
+	e.header = h.Header
+	e.headerLength = h.HeaderLength
+	return nil
+}
+
+func (o *Object) ECHeader() *ECHeader {
+	ec := (*object.Object)(o).GetHeader().GetEC()
+	if ec == nil {
+		return nil
+	}
+
+	h := new(ECHeader)
+	_ = h.ReadFromV2(ec)
+	return h
+}
+
+func (o *Object) SetECHeader(ec *ECHeader) {
+	o.setHeaderField(func(h *object.Header) {
+		if ec == nil {
+			h.SetEC(nil)
+			return
+		}
+
+		v2 := new(object.ECHeader)
+		ec.WriteToV2(v2)
+		h.SetEC(v2)
+	})
+}
+
+func (e *ECHeader) Parent() oid.ID {
+	return e.parent
+}
+
+func (e *ECHeader) SetParent(id oid.ID) {
+	e.parent = id
+}
+
+func (e *ECHeader) Index() uint32 {
+	return e.index
+}
+
+func (e *ECHeader) SetIndex(i uint32) {
+	e.index = i
+}
+
+func (e *ECHeader) Total() uint32 {
+	return e.total
+}
+
+func (e *ECHeader) SetTotal(i uint32) {
+	e.total = i
+}
+
+func (e *ECHeader) Header() []byte {
+	return e.header
+}
+
+func (e *ECHeader) SetHeader(header []byte) {
+	e.header = header
+}
+
+func (e *ECHeader) HeaderLength() uint32 {
+	return e.headerLength
+}
+
+func (e *ECHeader) SetHeaderLength(l uint32) {
+	e.headerLength = l
+}

object/erasurecode/constructor.go

@@ -0,0 +1,87 @@
+package erasurecode
+
+import (
+	"errors"
+
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"github.com/klauspost/reedsolomon"
+)
+
+var (
+	// ErrMalformedSlice is returned when a slice of EC chunks is inconsistent.
+	ErrMalformedSlice = errors.New("inconsistent EC headers")
+	// ErrInvShardNum is returned from NewConstructor when the number of shards is invalid.
+	ErrInvShardNum = reedsolomon.ErrInvShardNum
+	// ErrMaxShardNum is returned from NewConstructor when the number of shards is too big.
+	ErrMaxShardNum = reedsolomon.ErrMaxShardNum
+)
+
+// MaxShardCount is the maximum number of shards.
+const MaxShardCount = 256
+
+// Constructor is a wrapper around encoder allowing to reconstruct objects.
+// It's methods are not thread-safe.
+type Constructor struct {
+	enc           reedsolomon.Encoder
+	headerLength  uint32
+	payloadShards [][]byte
+	headerShards  [][]byte
+}
+
+// NewConstructor returns new constructor instance.
+func NewConstructor(dataCount int, parityCount int) (*Constructor, error) {
+	// The library supports up to 65536 shards with some restrictions.
+	// This can easily result in OOM or panic, thus SDK declares it's own restriction.
+	if dataCount+parityCount > MaxShardCount {
+		return nil, ErrMaxShardNum
+	}
+
+	enc, err := reedsolomon.New(dataCount, parityCount)
+	if err != nil {
+		return nil, err
+	}
+	return &Constructor{enc: enc}, nil
+}
+
+// clear clears internal state of the constructor, so it can be reused.
+func (c *Constructor) clear() {
+	c.headerLength = 0
+	c.payloadShards = nil
+	c.headerShards = nil
+}
+
+func (c *Constructor) fillHeader(parts []*objectSDK.Object) error {
+	shards := make([][]byte, len(parts))
+	headerLength := 0
+	for i := range parts {
+		if parts[i] == nil {
+			continue
+		}
+
+		var err error
+		headerLength, err = validatePart(parts, i, headerLength)
+		if err != nil {
+			return err
+		}
+
+		shards[i] = parts[i].GetECHeader().Header()
+	}
+
+	c.headerLength = uint32(headerLength)
+	c.headerShards = shards
+	return nil
+}
+
+// fillPayload fills the payload shards.
+// Currently there is no case when it can be called without reconstructing header,
+// thus fillHeader() must be called before and this function performs no validation.
+func (c *Constructor) fillPayload(parts []*objectSDK.Object) {
+	shards := make([][]byte, len(parts))
+	for i := range parts {
+		if parts[i] == nil {
+			continue
+		}
+		shards[i] = parts[i].Payload()
+	}
+	c.payloadShards = shards
+}

object/erasurecode/constructor_test.go

@@ -0,0 +1,31 @@
+package erasurecode_test
+
+import (
+	"testing"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/erasurecode"
+	"github.com/stretchr/testify/require"
+)
+
+func TestErasureConstruct(t *testing.T) {
+	t.Run("negative, no panic", func(t *testing.T) {
+		_, err := erasurecode.NewConstructor(-1, 2)
+		require.ErrorIs(t, err, erasurecode.ErrInvShardNum)
+	})
+	t.Run("negative, no panic", func(t *testing.T) {
+		_, err := erasurecode.NewConstructor(2, -1)
+		require.ErrorIs(t, err, erasurecode.ErrInvShardNum)
+	})
+	t.Run("zero parity", func(t *testing.T) {
+		_, err := erasurecode.NewConstructor(1, 0)
+		require.NoError(t, err)
+	})
+	t.Run("max shard num", func(t *testing.T) {
+		_, err := erasurecode.NewConstructor(erasurecode.MaxShardCount, 0)
+		require.NoError(t, err)
+	})
+	t.Run("max+1 shard num", func(t *testing.T) {
+		_, err := erasurecode.NewConstructor(erasurecode.MaxShardCount+1, 0)
+		require.ErrorIs(t, err, erasurecode.ErrMaxShardNum)
+	})
+}

object/erasurecode/reconstruct.go

@@ -0,0 +1,142 @@
+package erasurecode
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"fmt"
+
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"github.com/klauspost/reedsolomon"
+)
+
+// Reconstruct returns full object reconstructed from parts.
+// All non-nil objects in parts must have EC header with the same `total` field equal to len(parts).
+// The slice must contain at least one non nil object.
+// Index of the objects in parts must be equal to it's index field in the EC header.
+// The parts slice isn't changed and can be used concurrently for reading.
+func (c *Constructor) Reconstruct(parts []*objectSDK.Object) (*objectSDK.Object, error) {
+	res, err := c.ReconstructHeader(parts)
+	if err != nil {
+		return nil, err
+	}
+
+	c.fillPayload(parts)
+
+	payload, err := reconstructExact(c.enc, int(res.PayloadSize()), c.payloadShards)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %w", ErrMalformedSlice, err)
+	}
+
+	res.SetPayload(payload)
+	return res, nil
+}
+
+// ReconstructHeader returns object header reconstructed from parts.
+// All non-nil objects in parts must have EC header with the same `total` field equal to len(parts).
+// The slice must contain at least one non nil object.
+// Index of the objects in parts must be equal to it's index field in the EC header.
+// The parts slice isn't changed and can be used concurrently for reading.
+func (c *Constructor) ReconstructHeader(parts []*objectSDK.Object) (*objectSDK.Object, error) {
+	c.clear()
+
+	if err := c.fillHeader(parts); err != nil {
+		return nil, err
+	}
+
+	obj, err := c.reconstructHeader()
+	if err != nil {
+		return nil, fmt.Errorf("%w: %w", ErrMalformedSlice, err)
+	}
+	return obj, nil
+}
+
+// ReconstructParts reconstructs specific EC parts without reconstructing full object.
+// All non-nil objects in parts must have EC header with the same `total` field equal to len(parts).
+// The slice must contain at least one non nil object.
+// Index of the objects in parts must be equal to it's index field in the EC header.
+// Those parts for which corresponding element in required is true must be nil and will be overwritten.
+// Because partial reconstruction only makes sense for full objects, all parts must have non-empty payload.
+// If key is not nil, all reconstructed parts are signed with this key.
+func (c *Constructor) ReconstructParts(parts []*objectSDK.Object, required []bool, key *ecdsa.PrivateKey) error {
+	if len(required) != len(parts) {
+		return fmt.Errorf("len(parts) != len(required): %d != %d", len(parts), len(required))
+	}
+
+	c.clear()
+
+	if err := c.fillHeader(parts); err != nil {
+		return err
+	}
+	c.fillPayload(parts)
+
+	if err := c.enc.ReconstructSome(c.payloadShards, required); err != nil {
+		return fmt.Errorf("%w: %w", ErrMalformedSlice, err)
+	}
+	if err := c.enc.ReconstructSome(c.headerShards, required); err != nil {
+		return fmt.Errorf("%w: %w", ErrMalformedSlice, err)
+	}
+
+	nonNilPart := 0
+	for i := range parts {
+		if parts[i] != nil {
+			nonNilPart = i
+			break
+		}
+	}
+
+	ec := parts[nonNilPart].GetECHeader()
+	parent := ec.Parent()
+	total := ec.Total()
+
+	for i := range required {
+		if parts[i] != nil || !required[i] {
+			continue
+		}
+
+		part := objectSDK.New()
+		copyRequiredFields(part, parts[nonNilPart])
+		part.SetPayload(c.payloadShards[i])
+		part.SetPayloadSize(uint64(len(c.payloadShards[i])))
+		part.SetECHeader(objectSDK.NewECHeader(parent, uint32(i), total,
+			c.headerShards[i], c.headerLength))
+
+		if err := setIDWithSignature(part, key); err != nil {
+			return err
+		}
+		parts[i] = part
+	}
+	return nil
+}
+
+func (c *Constructor) reconstructHeader() (*objectSDK.Object, error) {
+	data, err := reconstructExact(c.enc, int(c.headerLength), c.headerShards)
+	if err != nil {
+		return nil, err
+	}
+
+	var obj objectSDK.Object
+	return &obj, obj.Unmarshal(data)
+}
+
+func reconstructExact(enc reedsolomon.Encoder, size int, shards [][]byte) ([]byte, error) {
+	if err := enc.ReconstructData(shards); err != nil {
+		return nil, err
+	}
+
+	// Technically, this error will be returned from enc.Join().
+	// However, allocating based on unvalidated user data is an easy attack vector.
+	// Preallocating seems to have enough benefits to justify a slight increase in code complexity.
+	maxSize := 0
+	for i := range shards {
+		maxSize += len(shards[i])
+	}
+	if size > maxSize {
+		return nil, reedsolomon.ErrShortData
+	}
+
+	buf := bytes.NewBuffer(make([]byte, 0, size))
+	if err := enc.Join(buf, shards, size); err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}

object/erasurecode/reconstruct_test.go

@@ -0,0 +1,284 @@
+package erasurecode_test
+
+import (
+	"context"
+	"crypto/rand"
+	"math"
+	"testing"
+
+	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/erasurecode"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/version"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/stretchr/testify/require"
+)
+
+func TestErasureCodeReconstruct(t *testing.T) {
+	const payloadSize = 99
+	const dataCount = 3
+	const parityCount = 2
+
+	// We would also like to test padding behaviour,
+	// so ensure padding is done.
+	require.NotZero(t, payloadSize%(dataCount+parityCount))
+
+	pk, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+
+	original := newObject(t, payloadSize, pk)
+
+	c, err := erasurecode.NewConstructor(dataCount, parityCount)
+	require.NoError(t, err)
+
+	parts, err := c.Split(original, &pk.PrivateKey)
+	require.NoError(t, err)
+
+	t.Run("reconstruct header", func(t *testing.T) {
+		original := original.CutPayload()
+		parts := cloneSlice(parts)
+		for i := range parts {
+			parts[i] = parts[i].CutPayload()
+		}
+		t.Run("from data", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			for i := dataCount; i < dataCount+parityCount; i++ {
+				parts[i] = nil
+			}
+			reconstructed, err := c.ReconstructHeader(parts)
+			require.NoError(t, err)
+			verifyReconstruction(t, original, reconstructed)
+		})
+		t.Run("from parity", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			for i := 0; i < parityCount; i++ {
+				parts[i] = nil
+			}
+			reconstructed, err := c.ReconstructHeader(parts)
+			require.NoError(t, err)
+			verifyReconstruction(t, original, reconstructed)
+
+			t.Run("not enough shards", func(t *testing.T) {
+				parts[parityCount] = nil
+				_, err := c.ReconstructHeader(parts)
+				require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+			})
+		})
+		t.Run("only nil parts", func(t *testing.T) {
+			parts := make([]*objectSDK.Object, len(parts))
+			_, err := c.ReconstructHeader(parts)
+			require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+		})
+		t.Run("missing EC header", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			parts[0] = deepCopy(t, parts[0])
+			parts[0].SetECHeader(nil)
+
+			_, err := c.ReconstructHeader(parts)
+			require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+		})
+		t.Run("invalid index", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			parts[0] = deepCopy(t, parts[0])
+
+			ec := parts[0].GetECHeader()
+			ec.SetIndex(1)
+			parts[0].SetECHeader(ec)
+
+			_, err := c.ReconstructHeader(parts)
+			require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+		})
+		t.Run("invalid total", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			parts[0] = deepCopy(t, parts[0])
+
+			ec := parts[0].GetECHeader()
+			ec.SetTotal(uint32(len(parts) + 1))
+			parts[0].SetECHeader(ec)
+
+			_, err := c.ReconstructHeader(parts)
+			require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+		})
+		t.Run("inconsistent header length", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			parts[0] = deepCopy(t, parts[0])
+
+			ec := parts[0].GetECHeader()
+			ec.SetHeaderLength(ec.HeaderLength() - 1)
+			parts[0].SetECHeader(ec)
+
+			_, err := c.ReconstructHeader(parts)
+			require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+		})
+		t.Run("invalid header length", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			for i := range parts {
+				parts[i] = deepCopy(t, parts[i])
+
+				ec := parts[0].GetECHeader()
+				ec.SetHeaderLength(math.MaxUint32)
+				parts[0].SetECHeader(ec)
+			}
+
+			_, err := c.ReconstructHeader(parts)
+			require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+		})
+	})
+	t.Run("reconstruct data", func(t *testing.T) {
+		t.Run("from data", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			for i := dataCount; i < dataCount+parityCount; i++ {
+				parts[i] = nil
+			}
+			reconstructed, err := c.Reconstruct(parts)
+			require.NoError(t, err)
+			verifyReconstruction(t, original, reconstructed)
+		})
+		t.Run("from parity", func(t *testing.T) {
+			parts := cloneSlice(parts)
+			for i := 0; i < parityCount; i++ {
+				parts[i] = nil
+			}
+			reconstructed, err := c.Reconstruct(parts)
+			require.NoError(t, err)
+			verifyReconstruction(t, original, reconstructed)
+
+			t.Run("not enough shards", func(t *testing.T) {
+				parts[parityCount] = nil
+				_, err := c.Reconstruct(parts)
+				require.ErrorIs(t, err, erasurecode.ErrMalformedSlice)
+			})
+		})
+	})
+	t.Run("reconstruct parts", func(t *testing.T) {
+		// We would like to also test that ReconstructParts doesn't perform
+		// excessive work, so ensure this test makes sense.
+		require.GreaterOrEqual(t, parityCount, 2)
+
+		t.Run("from data", func(t *testing.T) {
+			oldParts := parts
+			parts := cloneSlice(parts)
+			for i := dataCount; i < dataCount+parityCount; i++ {
+				parts[i] = nil
+			}
+
+			required := make([]bool, len(parts))
+			required[dataCount] = true
+
+			require.NoError(t, c.ReconstructParts(parts, required, nil))
+
+			old := deepCopy(t, oldParts[dataCount])
+			old.SetSignature(nil)
+			require.Equal(t, old, parts[dataCount])
+
+			for i := dataCount + 1; i < dataCount+parityCount; i++ {
+				require.Nil(t, parts[i])
+			}
+		})
+		t.Run("from parity", func(t *testing.T) {
+			oldParts := parts
+			parts := cloneSlice(parts)
+			for i := 0; i < parityCount; i++ {
+				parts[i] = nil
+			}
+
+			required := make([]bool, len(parts))
+			required[0] = true
+
+			require.NoError(t, c.ReconstructParts(parts, required, nil))
+
+			old := deepCopy(t, oldParts[0])
+			old.SetSignature(nil)
+			require.Equal(t, old, parts[0])
+
+			for i := 1; i < parityCount; i++ {
+				require.Nil(t, parts[i])
+			}
+		})
+	})
+}
+
+func newObject(t *testing.T, size uint64, pk *keys.PrivateKey) *objectSDK.Object {
+	// Use transformer to form object to avoid potential bugs with yet another helper object creation in tests.
+	tt := &testTarget{}
+	p := transformer.NewPayloadSizeLimiter(transformer.Params{
+		Key:                    &pk.PrivateKey,
+		NextTargetInit:         func() transformer.ObjectWriter { return tt },
+		NetworkState:           dummyEpochSource(123),
+		MaxSize:                size + 1,
+		WithoutHomomorphicHash: true,
+	})
+	cnr := cidtest.ID()
+	ver := version.Current()
+	hdr := objectSDK.New()
+	hdr.SetContainerID(cnr)
+	hdr.SetType(objectSDK.TypeRegular)
+	hdr.SetVersion(&ver)
+
+	var owner user.ID
+	user.IDFromKey(&owner, pk.PrivateKey.PublicKey)
+	hdr.SetOwnerID(owner)
+
+	var attr objectSDK.Attribute
+	attr.SetKey("somekey")
+	attr.SetValue("somevalue")
+	hdr.SetAttributes(attr)
+
+	expectedPayload := make([]byte, size)
+	_, _ = rand.Read(expectedPayload)
+	writeObject(t, context.Background(), p, hdr, expectedPayload)
+	require.Len(t, tt.objects, 1)
+	return tt.objects[0]
+}
+
+func writeObject(t *testing.T, ctx context.Context, target transformer.ChunkedObjectWriter, header *objectSDK.Object, payload []byte) *transformer.AccessIdentifiers {
+	require.NoError(t, target.WriteHeader(ctx, header))
+
+	_, err := target.Write(ctx, payload)
+	require.NoError(t, err)
+
+	ids, err := target.Close(ctx)
+	require.NoError(t, err)
+
+	return ids
+}
+
+func verifyReconstruction(t *testing.T, original, reconstructed *objectSDK.Object) {
+	require.True(t, reconstructed.VerifyIDSignature())
+	reconstructed.ToV2().SetMarshalData(nil)
+	original.ToV2().SetMarshalData(nil)
+
+	require.Equal(t, original, reconstructed)
+}
+
+func deepCopy(t *testing.T, obj *objectSDK.Object) *objectSDK.Object {
+	data, err := obj.Marshal()
+	require.NoError(t, err)
+
+	res := objectSDK.New()
+	require.NoError(t, res.Unmarshal(data))
+	return res
+}
+
+func cloneSlice[T any](src []T) []T {
+	dst := make([]T, len(src))
+	copy(dst, src)
+	return dst
+}
+
+type dummyEpochSource uint64
+
+func (s dummyEpochSource) CurrentEpoch() uint64 {
+	return uint64(s)
+}
+
+type testTarget struct {
+	objects []*objectSDK.Object
+}
+
+func (tt *testTarget) WriteObject(_ context.Context, o *objectSDK.Object) error {
+	tt.objects = append(tt.objects, o)
+	return nil // AccessIdentifiers should not be used.
+}

object/erasurecode/split.go

@@ -0,0 +1,76 @@
+package erasurecode
+
+import (
+	"crypto/ecdsa"
+
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+)
+
+// Split splits fully formed object into multiple chunks.
+func (c *Constructor) Split(obj *objectSDK.Object, key *ecdsa.PrivateKey) ([]*objectSDK.Object, error) {
+	c.clear()
+
+	header, err := obj.CutPayload().Marshal()
+	if err != nil {
+		return nil, err
+	}
+
+	headerShards, err := c.encodeRaw(header)
+	if err != nil {
+		return nil, err
+	}
+	payloadShards, err := c.encodeRaw(obj.Payload())
+	if err != nil {
+		return nil, err
+	}
+
+	parts := make([]*objectSDK.Object, len(payloadShards))
+	parent, _ := obj.ID()
+	for i := range parts {
+		chunk := objectSDK.New()
+		copyRequiredFields(chunk, obj)
+		chunk.SetPayload(payloadShards[i])
+		chunk.SetPayloadSize(uint64(len(payloadShards[i])))
+
+		if obj.SplitID() != nil {
+			var attr objectSDK.Attribute
+			attr.SetKey("split")
+			attr.SetValue("true")
+			chunk.SetAttributes(attr)
+		}
+
+		ec := objectSDK.NewECHeader(parent, uint32(i), uint32(len(payloadShards)), headerShards[i], uint32(len(header)))
+		chunk.SetECHeader(ec)
+		if err := setIDWithSignature(chunk, key); err != nil {
+			return nil, err
+		}
+
+		parts[i] = chunk
+	}
+	return parts, nil
+}
+
+func setIDWithSignature(obj *objectSDK.Object, key *ecdsa.PrivateKey) error {
+	objectSDK.CalculateAndSetPayloadChecksum(obj)
+
+	if err := objectSDK.CalculateAndSetID(obj); err != nil {
+		return err
+	}
+
+	if key == nil {
+		return nil
+	}
+
+	return objectSDK.CalculateAndSetSignature(*key, obj)
+}
+
+func (c *Constructor) encodeRaw(data []byte) ([][]byte, error) {
+	shards, err := c.enc.Split(data)
+	if err != nil {
+		return nil, err
+	}
+	if err := c.enc.Encode(shards); err != nil {
+		return nil, err
+	}
+	return shards, nil
+}

object/erasurecode/split_test.go

@@ -0,0 +1,45 @@
+package erasurecode_test
+
+import (
+	"testing"
+
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/erasurecode"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/stretchr/testify/require"
+)
+
+// The library can behave differently for big shard counts.
+// This test checks we support the maximum number of chunks we promise.
+func TestSplitMaxShardCount(t *testing.T) {
+	pk, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+
+	original := newObject(t, 1024, pk)
+
+	t.Run("only data", func(t *testing.T) {
+		c, err := erasurecode.NewConstructor(erasurecode.MaxShardCount, 0)
+		require.NoError(t, err)
+
+		parts, err := c.Split(original, &pk.PrivateKey)
+		require.NoError(t, err)
+		require.Len(t, parts, erasurecode.MaxShardCount)
+
+		for _, part := range parts {
+			require.NoError(t, objectSDK.CheckHeaderVerificationFields(part))
+		}
+	})
+	t.Run("data + parity", func(t *testing.T) {
+		c, err := erasurecode.NewConstructor(1, erasurecode.MaxShardCount-1)
+		require.NoError(t, err)
+
+		parts, err := c.Split(original, &pk.PrivateKey)
+		require.NoError(t, err)
+		require.Len(t, parts, erasurecode.MaxShardCount)
+
+		for _, part := range parts {
+			require.NoError(t, objectSDK.CheckHeaderVerificationFields(part))
+		}
+	})
+
+}

object/erasurecode/target.go

@@ -0,0 +1,44 @@
+package erasurecode
+
+import (
+	"context"
+	"crypto/ecdsa"
+
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
+)
+
+// Target accepts regular objects and splits them into erasure-coded chunks.
+type Target struct {
+	c    *Constructor
+	key  *ecdsa.PrivateKey
+	next transformer.ObjectWriter
+}
+
+// ObjectWriter is an interface of the object writer that writes prepared object.
+type ObjectWriter interface {
+	WriteObject(context.Context, *objectSDK.Object) error
+}
+
+// NewTarget returns new target instance.
+func NewTarget(c *Constructor, key *ecdsa.PrivateKey, next ObjectWriter) *Target {
+	return &Target{
+		c:    c,
+		key:  key,
+		next: next,
+	}
+}
+
+// WriteObject implements the transformer.ObjectWriter interface.
+func (t *Target) WriteObject(ctx context.Context, obj *objectSDK.Object) error {
+	parts, err := t.c.Split(obj, t.key)
+	if err != nil {
+		return err
+	}
+	for i := range parts {
+		if err := t.next.WriteObject(ctx, parts[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}