Timer in go that syncs with random nodes in the mesh every

given time interval.

pkg/lib/random.go

@@ -0,0 +1,25 @@
+package lib
+
+import "math/rand"
+
+// RandomSubsetOfLength: Given an array of nodes generate of random
+// subset of 'num' length.
+func RandomSubsetOfLength[V any](vs []V, num int) []V {
+	randomSubset := make([]V, 0)
+	selectedIndices := make(map[int]struct{})
+
+	for i := 0; i < num; {
+		if len(selectedIndices) == len(vs) {
+			return randomSubset
+		}
+
+		randomIndex := rand.Intn(len(vs))
+
+		if _, ok := selectedIndices[randomIndex]; !ok {
+			randomSubset = append(randomSubset, vs[randomIndex])
+			i++
+		}
+	}
+
+	return randomSubset
+}