add transaction tag index

pkg/utils/slices.go

@@ -17,3 +17,40 @@ func IsStringSliceEuqals(s1, s2 []string) bool {
 
 	return true
 }
+
+func Int64SliceMinus(s1, s2 []int64) []int64 {
+	if s1 == nil {
+		return nil
+	}
+
+	s2ItemsMap := make(map[int64]bool)
+	var ret []int64
+
+	for i := 0; i < len(s2); i++ {
+		s2ItemsMap[s2[i]] = true
+	}
+
+	for i := 0; i < len(s1); i++ {
+		if _, exists := s2ItemsMap[s1[i]]; !exists {
+			ret = append(ret, s1[i])
+		}
+	}
+
+	return ret
+}
+
+func ToUniqueInt64Slice(items []int64) []int64 {
+	var uniqueItems []int64
+	itemExistMap := make(map[int64]bool)
+
+	for i := 0; i < len(items); i++ {
+		item := items[i]
+
+		if _, exists := itemExistMap[item]; !exists {
+			uniqueItems = append(uniqueItems, item)
+			itemExistMap[item] = true
+		}
+	}
+
+	return uniqueItems
+}