diff --git a/sdks/storage/models.go b/sdks/storage/models.go
index e4cc3d8..0ad6b81 100644
--- a/sdks/storage/models.go
+++ b/sdks/storage/models.go
@@ -140,6 +140,13 @@ type Bucket struct {
 	CreatorID UserID   `db:"CreatorID" json:"creatorID"`
 }
 
+type NodeConnectivity struct {
+	FromNodeID NodeID    `db:"FromNodeID" json:"fromNodeID"`
+	ToNodeID   NodeID    `db:"ToNodeID" json:"ToNodeID"`
+	Delay      *float32  `db:"Delay" json:"delay"`
+	TestTime   time.Time `db:"TestTime" json:"testTime"`
+}
+
 type NodePackageCachingInfo struct {
 	NodeID      NodeID `json:"nodeID"`
 	FileSize    int64  `json:"fileSize"`
diff --git a/utils/sort2/sort.go b/utils/sort2/sort.go
index d594352..9967fa8 100644
--- a/utils/sort2/sort.go
+++ b/utils/sort2/sort.go
@@ -36,6 +36,14 @@ func Sort[T any](arr []T, cmp Comparer[T]) []T {
 	return arr
 }
 
+func SortAsc[T constraints.Ordered](arr []T) []T {
+	return Sort(arr, Cmp[T])
+}
+
+func SortDesc[T constraints.Ordered](arr []T) []T {
+	return Sort(arr, func(left, right T) int { return Cmp(right, left) })
+}
+
 // false < true
 func CmpBool(left, right bool) int {
 	leftVal := 0