[#11] Rename neofs contract to frostfs

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

pkg/morph/event/frostfs/config.go

@@ -0,0 +1,74 @@
+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"
+)
+
+type Config struct {
+	key   []byte
+	value []byte
+	id    []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 (u Config) TxHash() util.Uint256 {
+	return u.txHash
+}
+
+// MorphEvent implements Neo:Morph Event interface.
+func (Config) MorphEvent() {}
+
+func (u Config) ID() []byte { return u.id }
+
+func (u Config) Key() []byte { return u.key }
+
+func (u Config) Value() []byte { return u.value }
+
+func ParseConfig(e *state.ContainedNotificationEvent) (event.Event, error) {
+	var (
+		ev  Config
+		err error
+	)
+
+	params, err := event.ParseStackArray(e)
+	if err != nil {
+		return nil, fmt.Errorf("could not parse stack items from notify event: %w", err)
+	}
+
+	if ln := len(params); ln != 3 {
+		return nil, event.WrongNumberOfParameters(3, ln)
+	}
+
+	// parse id
+	ev.id, err = client.BytesFromStackItem(params[0])
+	if err != nil {
+		return nil, fmt.Errorf("could not get config update id: %w", err)
+	}
+
+	// parse key
+	ev.key, err = client.BytesFromStackItem(params[1])
+	if err != nil {
+		return nil, fmt.Errorf("could not get config key: %w", err)
+	}
+
+	// parse value
+	ev.value, err = client.BytesFromStackItem(params[2])
+	if err != nil {
+		return nil, fmt.Errorf("could not get config value: %w", err)
+	}
+
+	ev.txHash = e.Container
+
+	return ev, nil
+}