diff --git a/packages/globals/globals.go b/packages/globals/globals.go
index a0e1d92..00d4279 100644
--- a/packages/globals/globals.go
+++ b/packages/globals/globals.go
@@ -3,7 +3,8 @@ package globals
 import "time"
 
 const (
-	MaxDirectMsgCache      uint32        = 12
+	MaxDirectMsgCache uint32 = 32
+	MaxHubMsgCache
 	FileStorageBucketName  string        = "communicator"
 	MaxPostBytes           uint32        = 4 << 10
 	MaxPostWithFileBytes   uint32        = 1 << 30
diff --git a/packages/types/types.go b/packages/types/types.go
index ba4cb72..e19d2e1 100644
--- a/packages/types/types.go
+++ b/packages/types/types.go
@@ -87,7 +87,7 @@ func (conn *Connection) GetSortedMessagesBuff() (*[globals.MaxDirectMsgCache]*Me
 	return sorted, globals.MaxDirectMsgCache
 }
 
-type ConnectionStatusChangeData struct {
+type ConnectionStatusSetData struct {
 	Id       uuid.UUID                       `json:"id"`
 	NewState ConnectionState.ConnectionState `json:"newState"`
 }
@@ -115,3 +115,79 @@ type WsAuthMessage struct {
 	Success bool   `json:"success"`
 	Error   string `json:"error"`
 }
+
+type RolePermission uint32
+
+const (
+	RoleSetHubName RolePermission = iota
+	RoleSetHubBg
+	RoleSetHubColor
+	RoleRemoveHub
+	RoleSetUserColorAllowed
+
+	RoleAddUser
+	RoleRemoveUser
+	RoleRenameUser
+	RoleMuteUser
+
+	RoleAddRole
+	RoleRemoveRole
+
+	RoleAddChannelGroup
+	RoleRemoveChannelGroup
+	RoleSetChannelGroupName
+	RoleSetChannelGroupColor
+	RoleSetChannelGroupPermittedVisibleRoles
+
+	RoleAddChannel
+	RoleRemoveChannel
+	RoleSetChannelName
+	RoleSetChannelPermittedVisibleRoles
+	RoleSetChannelPermittedSendMessageRoles
+	RoleSetChannelPermittedReadHistoryRoles
+)
+
+type Hub struct {
+	Mu             sync.RWMutex                     `json:"-"`
+	Id             uuid.UUID                        `json:"id"`
+	CreatedAt      time.Time                        `json:"createdAt"`
+	MessagesBuff   [globals.MaxHubMsgCache]*Message `json:"-"`
+	NextBuffIdx    uint32                           `json:"-"`
+	HaveOverflowed bool                             `json:"-"`
+	Users          map[uuid.UUID]*HubUser           `json:"-"`
+	Roles          map[uint8]*HubRole               `json:"-"`
+	Creator        uuid.UUID                        `json:"creator"`
+}
+
+type HubUser struct {
+	Id        uuid.UUID `json:"id"`
+	Username  string    `json:"username"`
+	Roles     []uint8   `json:"roles"`
+	CreatedAt time.Time `json:"createdAt"`
+}
+
+type HubRole struct {
+	Name           string         `json:"role"`
+	Id             uint8          `json:"id"`
+	RolePermission RolePermission `json:"rolePermission"`
+}
+
+func (h HubRole) GrantPermission(r RolePermission) {
+	h.RolePermission |= r
+}
+func (h HubRole) GrantPermissions(rs []RolePermission) {
+	for _, r := range rs {
+		h.RolePermission |= r
+	}
+}
+func (h HubRole) RevokePermission(r RolePermission) {
+	h.RolePermission &^= r
+}
+func (h HubRole) RevokePermissions(rs []RolePermission) {
+	for _, r := range rs {
+		h.RolePermission &^= r
+	}
+}
+func (h HubRole) HasPermission(r RolePermission) bool {
+	return h.RolePermission&r != 0
+}