Add Inner Ring code

pkg/morph/event/netmap/epoch.go

@@ -0,0 +1,39 @@
+package netmap
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	"github.com/pkg/errors"
+)
+
+// NewEpoch is a new epoch Neo:Morph event.
+type NewEpoch struct {
+	num uint64
+}
+
+// MorphEvent implements Neo:Morph Event interface.
+func (NewEpoch) MorphEvent() {}
+
+// EpochNumber returns new epoch number.
+func (s NewEpoch) EpochNumber() uint64 {
+	return s.num
+}
+
+// ParseNewEpoch is a parser of new epoch notification event.
+//
+// Result is type of NewEpoch.
+func ParseNewEpoch(prms []smartcontract.Parameter) (event.Event, error) {
+	if ln := len(prms); ln != 1 {
+		return nil, event.WrongNumberOfParameters(1, ln)
+	}
+
+	prmEpochNum, err := client.IntFromStackParameter(prms[0])
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get integer epoch number")
+	}
+
+	return NewEpoch{
+		num: uint64(prmEpochNum),
+	}, nil
+}