Add Inner Ring code

pkg/innerring/invoke/netmap.go

@@ -0,0 +1,39 @@
+package invoke
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
+)
+
+const (
+	getEpochMethod    = "Epoch"
+	setNewEpochMethod = "NewEpoch"
+)
+
+// Epoch return epoch value from contract.
+func Epoch(cli *client.Client, con util.Uint160) (int64, error) {
+	if cli == nil {
+		return 0, client.ErrNilClient
+	}
+
+	val, err := cli.TestInvoke(con, getEpochMethod)
+	if err != nil {
+		return 0, err
+	}
+
+	epoch, err := client.IntFromStackParameter(val[0])
+	if err != nil {
+		return 0, err
+	}
+
+	return epoch, nil
+}
+
+// SetNewEpoch invokes NewEpoch method.
+func SetNewEpoch(cli *client.Client, con util.Uint160, epoch uint64) error {
+	if cli == nil {
+		return client.ErrNilClient
+	}
+
+	return cli.Invoke(con, extraFee, setNewEpochMethod, int64(epoch))
+}