[#505] morph/container: Do not parse public key in Put event parser

Morph event structures defined in `pkg/morph/event`  should only carry
notification values without any additional interpretation. All logical work
should be concentrated on app-side.

Change data type of `Put.PublicKey` return to byte slice. `ParsePut` doesn't
unmarshal public key from now.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/morph/event/container/put_test.go

@@ -1,14 +1,10 @@
 package container
 
 import (
-	"crypto/elliptic"
 	"testing"
 
-	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
-	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
-	"github.com/nspcc-dev/neofs-node/pkg/util/test"
 	"github.com/stretchr/testify/require"
 )
 
@@ -16,7 +12,7 @@ func TestParsePut(t *testing.T) {
 	var (
 		containerData = []byte("containerData")
 		signature     = []byte("signature")
-		publicKey     = &test.DecodeKey(-1).PublicKey
+		publicKey     = []byte("pubkey")
 	)
 
 	t.Run("wrong number of parameters", func(t *testing.T) {
@@ -60,17 +56,14 @@ func TestParsePut(t *testing.T) {
 		ev, err := ParsePut([]stackitem.Item{
 			stackitem.NewByteArray(containerData),
 			stackitem.NewByteArray(signature),
-			stackitem.NewByteArray(crypto.MarshalPublicKey(publicKey)),
+			stackitem.NewByteArray(publicKey),
 		})
 		require.NoError(t, err)
 
-		expectedKey, err := keys.NewPublicKeyFromBytes(crypto.MarshalPublicKey(publicKey), elliptic.P256())
-		require.NoError(t, err)
-
 		require.Equal(t, Put{
 			rawContainer: containerData,
 			signature:    signature,
-			publicKey:    expectedKey,
+			publicKey:    publicKey,
 		}, ev)
 	})
 }