Add Inner Ring code

pkg/core/container/container.go

@@ -0,0 +1,82 @@
+package container
+
+import (
+	"errors"
+
+	"github.com/nspcc-dev/neofs-node/pkg/core/container/acl/basic"
+	"github.com/nspcc-dev/netmap"
+)
+
+// BasicACL represents the basic
+// ACL rules.
+//
+// It is a type alias of
+// github.com/nspcc-dev/neofs-node/pkg/core/container/basic.ACL.
+type BasicACL = basic.ACL
+
+// PlacementRule represents placement
+// rules of the container.
+//
+// It is a type alias of
+// github.com/nspcc-dev/netmap.PlacementRule.
+// FIXME: container placement rules should be defined in core lib.
+type PlacementRule = netmap.PlacementRule
+
+// Container represents NeoFS container.
+type Container struct {
+	basicACL BasicACL // basic ACL mask
+
+	ownerID OwnerID // the identifier of container's owner
+
+	salt []byte // unique container bytes
+
+	placementRule PlacementRule // placement rules
+}
+
+// ErrNilContainer is the error returned by functions that
+// expect a non-nil container pointer, but received nil.
+var ErrNilContainer = errors.New("container is nil")
+
+// OwnerID returns an ID of the container's owner.
+func (c *Container) OwnerID() OwnerID {
+	return c.ownerID
+}
+
+// SetOwnerID sets the ID of the container's owner.
+func (c *Container) SetOwnerID(v OwnerID) {
+	c.ownerID = v
+}
+
+// Salt returns the container salt.
+//
+// Slice is returned by reference without copying.
+func (c *Container) Salt() []byte {
+	return c.salt
+}
+
+// SetSalt sets the container salt.
+//
+// Slice is assigned by reference without copying.
+func (c *Container) SetSalt(v []byte) {
+	c.salt = v
+}
+
+// BasicACL returns the mask of basic container permissions.
+func (c *Container) BasicACL() BasicACL {
+	return c.basicACL
+}
+
+// SetBasicACL sets the mask of basic container permissions.
+func (c *Container) SetBasicACL(v BasicACL) {
+	c.basicACL = v
+}
+
+// PlacementRule returns placement rule of the container.
+func (c *Container) PlacementRule() PlacementRule {
+	return c.placementRule
+}
+
+// SetPlacementRule sets placement rule of the container.
+func (c *Container) SetPlacementRule(v PlacementRule) {
+	c.placementRule = v
+}