Add Inner Ring code

pkg/morph/client/container/wrapper/wrapper.go

@@ -0,0 +1,43 @@
+package wrapper
+
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/core/container/storage"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/client/container"
+)
+
+// Client represents the Container contract client.
+//
+// It is a type alias of
+// github.com/nspcc-dev/neofs-node/pkg/morph/client/container.Client.
+type Client = container.Client
+
+// CID represents the container identifier.
+//
+// CID is a type alias of
+// github.com/nspcc-dev/neofs-node/pkg/core/container/storage.CID.
+type CID = storage.CID
+
+// Wrapper is a wrapper over container contract
+// client which implements container storage and
+// eACL storage methods.
+//
+// Working wrapper must be created via constructor New.
+// Using the Wrapper that has been created with new(Wrapper)
+// expression (or just declaring a Wrapper variable) is unsafe
+// and can lead to panic.
+type Wrapper struct {
+	client *Client
+}
+
+// New creates, initializes and returns the Wrapper instance.
+//
+// If Client is nil, container.ErrNilClient is returned.
+func New(c *Client) (*Wrapper, error) {
+	if c == nil {
+		return nil, container.ErrNilClient
+	}
+
+	return &Wrapper{
+		client: c,
+	}, nil
+}