chore: refactor storage layer

internal/database/serializationutil/serializationutil_test.go

@@ -0,0 +1,23 @@
+package serializationutil
+
+import "testing"
+
+func TestItoa(t *testing.T) {
+	nums := []int64{0, 1, 2, 3, 4, 1 << 32, int64(1) << 62}
+	for _, num := range nums {
+		b := Itob(num)
+		if Btoi(b) != num {
+			t.Errorf("itob/btoi failed for %d", num)
+		}
+	}
+}
+
+func TestStob(t *testing.T) {
+	strs := []string{"", "a", "ab", "abc", "abcd", "abcde", "abcdef"}
+	for _, str := range strs {
+		b := Stob(str)
+		if val, _ := Btos(b); val != str {
+			t.Errorf("stob/btos failed for %s", str)
+		}
+	}
+}