[#11] Rename neofs contract to frostfs

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/morph/event/frostfs/bind.go

@@ -0,0 +1,92 @@
+package frostfs
+
+import (
+	"fmt"
+
+	"github.com/TrueCloudLab/frostfs-node/pkg/morph/client"
+	"github.com/TrueCloudLab/frostfs-node/pkg/morph/event"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+)
+
+type Bind struct {
+	bindCommon
+}
+
+type bindCommon struct {
+	user []byte
+	keys [][]byte
+
+	// txHash is used in notary environmental
+	// for calculating unique but same for
+	// all notification receivers values.
+	txHash util.Uint256
+}
+
+// TxHash returns hash of the TX with new epoch
+// notification.
+func (b bindCommon) TxHash() util.Uint256 {
+	return b.txHash
+}
+
+// MorphEvent implements Neo:Morph Event interface.
+func (bindCommon) MorphEvent() {}
+
+func (b bindCommon) Keys() [][]byte { return b.keys }
+
+func (b bindCommon) User() []byte { return b.user }
+
+func ParseBind(e *state.ContainedNotificationEvent) (event.Event, error) {
+	var (
+		ev  Bind
+		err error
+	)
+
+	params, err := event.ParseStackArray(e)
+	if err != nil {
+		return nil, fmt.Errorf("could not parse stack items from notify event: %w", err)
+	}
+
+	err = parseBind(&ev.bindCommon, params)
+	if err != nil {
+		return nil, err
+	}
+
+	ev.txHash = e.Container
+
+	return ev, nil
+}
+
+func parseBind(dst *bindCommon, params []stackitem.Item) error {
+	if ln := len(params); ln != 2 {
+		return event.WrongNumberOfParameters(2, ln)
+	}
+
+	var err error
+
+	// parse user
+	dst.user, err = client.BytesFromStackItem(params[0])
+	if err != nil {
+		return fmt.Errorf("could not get bind user: %w", err)
+	}
+
+	// parse keys
+	bindKeys, err := client.ArrayFromStackItem(params[1])
+	if err != nil {
+		return fmt.Errorf("could not get bind keys: %w", err)
+	}
+
+	dst.keys = make([][]byte, 0, len(bindKeys))
+
+	for i := range bindKeys {
+		rawKey, err := client.BytesFromStackItem(bindKeys[i])
+		if err != nil {
+			return fmt.Errorf("could not get bind public key: %w", err)
+		}
+
+		dst.keys = append(dst.keys, rawKey)
+	}
+
+	return nil
+}