diff --git a/go.mod b/go.mod
index 7be2a952..944ca72f 100644
--- a/go.mod
+++ b/go.mod
@@ -15,7 +15,7 @@ require (
 	github.com/multiformats/go-multiaddr-net v0.1.2 // v0.1.1 => v0.1.2
 	github.com/multiformats/go-multihash v0.0.13 // indirect
 	github.com/nspcc-dev/hrw v1.0.9
-	github.com/nspcc-dev/neo-go v0.94.0
+	github.com/nspcc-dev/neo-go v0.94.1
 	github.com/nspcc-dev/neofs-api-go v1.25.1-0.20210402125759-771f395d9d4e
 	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/nspcc-dev/tzhash v1.4.0
diff --git a/go.sum b/go.sum
index a2f93c73..59f1cd46 100644
--- a/go.sum
+++ b/go.sum
@@ -24,10 +24,8 @@ github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/PaesslerAG/gval v1.0.0 h1:GEKnRwkWDdf9dOmKcNrar9EA1bz1z9DqPIO1+iLzhd8=
 github.com/PaesslerAG/gval v1.0.0/go.mod h1:y/nm5yEyTeX6av0OfKJNp9rBNj2XrGhAf5+v24IBN1I=
 github.com/PaesslerAG/jsonpath v0.1.0/go.mod h1:4BzmtoM/PI8fPO4aQGIusjGxGir2BzcV0grWtFzq1Y8=
-github.com/PaesslerAG/jsonpath v0.1.1 h1:c1/AToHQMVsduPAa4Vh6xp2U0evy4t8SWp8imEsylIk=
 github.com/PaesslerAG/jsonpath v0.1.1/go.mod h1:lVboNxFGal/VwW6d9JzIy56bUsYAP6tH/x80vjnCseY=
 github.com/Workiva/go-datastructures v1.0.50 h1:slDmfW6KCHcC7U+LP3DDBbm4fqTwZGn1beOFPfGaLvo=
 github.com/Workiva/go-datastructures v1.0.50/go.mod h1:Z+F2Rca0qCsVYDS8z7bAGm8f3UkzuWYS/oBZz5a7VVA=
@@ -121,7 +119,6 @@ github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/me
 github.com/go-yaml/yaml v2.1.0+incompatible/go.mod h1:w2MrLa16VYP0jy6N7M5kHaCkaLENm+P+Tv+MfurjSw0=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
-github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
 github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -276,8 +273,8 @@ github.com/nspcc-dev/hrw v1.0.9 h1:17VcAuTtrstmFppBjfRiia4K2wA/ukXZhLFS8Y8rz5Y=
 github.com/nspcc-dev/hrw v1.0.9/go.mod h1:l/W2vx83vMQo6aStyx2AuZrJ+07lGv2JQGlVkPG06MU=
 github.com/nspcc-dev/neo-go v0.73.1-pre.0.20200303142215-f5a1b928ce09/go.mod h1:pPYwPZ2ks+uMnlRLUyXOpLieaDQSEaf4NM3zHVbRjmg=
 github.com/nspcc-dev/neo-go v0.91.0/go.mod h1:G6HdOWvzQ6tlvFdvFSN/PgCzLPN/X/X4d5hTjFRUDcc=
-github.com/nspcc-dev/neo-go v0.94.0 h1:2eafoyEnueqEMGDZF06HZJQN0MHgYxFzlcre5YUOP1M=
-github.com/nspcc-dev/neo-go v0.94.0/go.mod h1:IrBT/UG3/Slhqgjge8r6zni5tNRsWmwwG9OnVdASheI=
+github.com/nspcc-dev/neo-go v0.94.1 h1:AHUnADrzJ3JW2wO8xSp9dH8/Lo5UwTojkpuNqHuulSw=
+github.com/nspcc-dev/neo-go v0.94.1/go.mod h1:IrBT/UG3/Slhqgjge8r6zni5tNRsWmwwG9OnVdASheI=
 github.com/nspcc-dev/neofs-api-go v1.24.0/go.mod h1:G7dqincfdjBrAbL5nxVp82emF05fSVEqe59ICsoRDI8=
 github.com/nspcc-dev/neofs-api-go v1.25.1-0.20210402125759-771f395d9d4e h1:yAsO+uJDClvttFwhStZgnV2xdYP+TWGyk0ib5ceTaIo=
 github.com/nspcc-dev/neofs-api-go v1.25.1-0.20210402125759-771f395d9d4e/go.mod h1:G7dqincfdjBrAbL5nxVp82emF05fSVEqe59ICsoRDI8=
diff --git a/pkg/morph/client/client.go b/pkg/morph/client/client.go
index d1d9fea0..6587d5de 100644
--- a/pkg/morph/client/client.go
+++ b/pkg/morph/client/client.go
@@ -2,10 +2,9 @@ package client
 
 import (
 	"context"
-	"crypto/elliptic"
 	"time"
 
-	"github.com/nspcc-dev/neo-go/pkg/core/native"
+	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
@@ -35,8 +34,6 @@ type Client struct {
 
 	gas util.Uint160 // native gas script-hash
 
-	neo util.Uint160 // native neo script-hash
-
 	designate util.Uint160 // native designate script-hash
 
 	waitInterval time.Duration
@@ -51,11 +48,6 @@ var ErrNilClient = errors.New("client is nil")
 // HaltState returned if TestInvoke function processed without panic.
 const HaltState = "HALT"
 
-const (
-	committeeList = "getCommittee"
-	designateList = "getDesignatedByRole"
-)
-
 var errEmptyInvocationScript = errors.New("got empty invocation script from neo node")
 
 var errScriptDecode = errors.New("could not decode invocation script from neo node")
@@ -204,24 +196,14 @@ func (c *Client) GasBalance() (int64, error) {
 
 // Committee returns keys of chain committee from neo native contract.
 func (c *Client) Committee() (keys.PublicKeys, error) {
-	items, err := c.TestInvoke(c.neo, committeeList)
-	if err != nil {
-		return nil, err
-	}
-
-	roleKeys, err := keysFromStack(items)
-	if err != nil {
-		return nil, errors.Wrap(err, "can't get committee keys")
-	}
-
-	return roleKeys, nil
+	return c.client.GetCommittee()
 }
 
 // NeoFSAlphabetList returns keys that stored in NeoFS Alphabet role. Main chain
 // stores alphabet node keys of inner ring there, however side chain stores both
 // alphabet and non alphabet node keys of inner ring.
 func (c *Client) NeoFSAlphabetList() (keys.PublicKeys, error) {
-	list, err := c.roleList(native.RoleNeoFSAlphabet)
+	list, err := c.roleList(noderoles.NeoFSAlphabet)
 	if err != nil {
 		return nil, errors.Wrap(err, "can't get alphabet nodes role list")
 	}
@@ -229,23 +211,13 @@ func (c *Client) NeoFSAlphabetList() (keys.PublicKeys, error) {
 	return list, nil
 }
 
-func (c *Client) roleList(r native.Role) (keys.PublicKeys, error) {
+func (c *Client) roleList(r noderoles.Role) (keys.PublicKeys, error) {
 	height, err := c.client.GetBlockCount()
 	if err != nil {
 		return nil, errors.Wrap(err, "can't get chain height")
 	}
 
-	items, err := c.TestInvoke(c.designate, designateList, r, int64(height))
-	if err != nil {
-		return nil, err
-	}
-
-	roleKeys, err := keysFromStack(items)
-	if err != nil {
-		return nil, errors.Wrap(err, "can't get role keys")
-	}
-
-	return roleKeys, nil
+	return c.client.GetDesignatedByRole(r, height)
 }
 
 func toStackParameter(value interface{}) (sc.Parameter, error) {
@@ -277,7 +249,7 @@ func toStackParameter(value interface{}) (sc.Parameter, error) {
 	case util.Uint160:
 		result.Type = sc.ByteArrayType
 		result.Value = v.BytesBE()
-	case native.Role:
+	case noderoles.Role:
 		result.Type = sc.IntegerType
 		result.Value = int64(v)
 	case keys.PublicKeys:
@@ -294,34 +266,6 @@ func toStackParameter(value interface{}) (sc.Parameter, error) {
 	return result, nil
 }
 
-func keysFromStack(data []stackitem.Item) (keys.PublicKeys, error) {
-	if len(data) == 0 {
-		return nil, nil
-	}
-
-	arr, err := ArrayFromStackItem(data[0])
-	if err != nil {
-		return nil, errors.Wrap(err, "non array element on stack")
-	}
-
-	res := make([]*keys.PublicKey, 0, len(arr))
-	for i := range arr {
-		rawKey, err := BytesFromStackItem(arr[i])
-		if err != nil {
-			return nil, errors.Wrap(err, "key is not slice of bytes")
-		}
-
-		key, err := keys.NewPublicKeyFromBytes(rawKey, elliptic.P256())
-		if err != nil {
-			return nil, errors.Wrap(err, "can't parse key")
-		}
-
-		res = append(res, key)
-	}
-
-	return res, nil
-}
-
 // MagicNumber returns the magic number of the network
 // to which the underlying RPC node client is connected.
 func (c *Client) MagicNumber() uint64 {
diff --git a/pkg/morph/client/constructor.go b/pkg/morph/client/constructor.go
index 573d81a9..10915a21 100644
--- a/pkg/morph/client/constructor.go
+++ b/pkg/morph/client/constructor.go
@@ -100,11 +100,6 @@ func New(key *ecdsa.PrivateKey, endpoint string, opts ...Option) (*Client, error
 		return nil, err
 	}
 
-	neo, err := cli.GetNativeContractHash(nativenames.Neo)
-	if err != nil {
-		return nil, err
-	}
-
 	designate, err := cli.GetNativeContractHash(nativenames.Designation)
 	if err != nil {
 		return nil, err
@@ -115,7 +110,6 @@ func New(key *ecdsa.PrivateKey, endpoint string, opts ...Option) (*Client, error
 		client:       cli,
 		acc:          account,
 		gas:          gas,
-		neo:          neo,
 		designate:    designate,
 		waitInterval: cfg.waitInterval,
 	}, nil
diff --git a/pkg/morph/client/notary.go b/pkg/morph/client/notary.go
index 72b25029..b55f8cae 100644
--- a/pkg/morph/client/notary.go
+++ b/pkg/morph/client/notary.go
@@ -1,8 +1,8 @@
 package client
 
 import (
-	"github.com/nspcc-dev/neo-go/pkg/core/native"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
+	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
@@ -50,7 +50,6 @@ const (
 
 var (
 	errNotaryNotEnabled = errors.New("notary support was not enabled on this client")
-	errInvalidIR        = errors.New("invalid inner ring list from netmap contract")
 	errUnexpectedItems  = errors.New("invalid number of NEO VM arguments on stack")
 )
 
@@ -159,7 +158,7 @@ func (c *Client) UpdateNotaryList(list keys.PublicKeys) error {
 
 	return c.notaryInvokeAsCommittee(c.designate,
 		setDesignateMethod,
-		native.RoleP2PNotary,
+		noderoles.P2PNotary,
 		list,
 	)
 }
@@ -174,7 +173,7 @@ func (c *Client) UpdateNeoFSAlphabetList(list keys.PublicKeys) error {
 
 	return c.notaryInvokeAsCommittee(c.designate,
 		setDesignateMethod,
-		native.RoleNeoFSAlphabet,
+		noderoles.NeoFSAlphabet,
 		list,
 	)
 }
@@ -253,7 +252,6 @@ func (c *Client) notaryInvoke(committee bool, contract util.Uint160, method stri
 			},
 		},
 		Signers: cosigners,
-		Network: c.client.GetNetwork(),
 	}
 
 	// calculate notary fee
@@ -366,7 +364,7 @@ func (c *Client) notaryWitnesses(multiaddr *wallet.Account, tx *transaction.Tran
 	w = append(w, transaction.Witness{
 		InvocationScript: append(
 			[]byte{byte(opcode.PUSHDATA1), 64},
-			multiaddr.PrivateKey().Sign(tx.GetSignedPart())...,
+			multiaddr.PrivateKey().SignHashable(uint32(c.client.GetNetwork()), tx)...,
 		),
 		VerificationScript: multiaddr.GetVerificationScript(),
 	})