diff --git a/back/usecase/usecase.go b/back/usecase/usecase.go
index a4d79fc..055c8ab 100644
--- a/back/usecase/usecase.go
+++ b/back/usecase/usecase.go
@@ -30,10 +30,6 @@ func (u Usecase) NewUser(userid string) (domain.User, error) {
 	return user, nil
 }
 
-func (u Usecase) GetUser(userID string) (domain.User, error) {
-	return u.db.GetUser(userID)
-}
-
 func (u Usecase) NewMoneyPool(moneyPoolName, moneyPoolColor, userID string, isWorldPublic bool) (domain.MoneyPool, error) {
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	moneyPoolID := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%v%v%v", moneyPoolName, userID, r.Int63())))
@@ -62,51 +58,3 @@ func (u Usecase) NewMoneyPool(moneyPoolName, moneyPoolColor, userID string, isWo
 	}
 	return moneyPool, nil
 }
-
-func (u Usecase) GetMoneyPool(moneyPoolID string) (domain.MoneyPool, error) {
-	return u.db.GetMoneyPool(moneyPoolID)
-}
-
-func (u Usecase) GetMoneyPoolsByUser(user domain.User) ([]domain.MoneyPool, error) {
-	return u.db.GetMoneyPoolsByUsers(user)
-}
-
-func (u Usecase) UpdateMoneyPool(moneyPool domain.MoneyPool) error {
-	return u.db.UpdateMoneyPool(moneyPool)
-}
-
-func (u Usecase) NewTransaction(transaction domain.Transaction, user domain.User) error {
-	return u.db.NewTransaction(transaction)
-}
-
-func (u Usecase) GetTransactionsByTimeRange(UserID string, moneyPoolID string, from time.Time, to time.Time) ([]domain.Transaction, error) {
-	if moneyPoolID != "" {
-		PartitioningKeys := []string{}
-		for t := from; t.Before(to); t = t.AddDate(0, 1, 0) {
-			PartitioningKeys = append(PartitioningKeys, t.Format("2006-01"))
-		}
-		return u.db.GetTransactionsByMoneyPool(moneyPoolID, domain.GetTransactionHints{
-			PartitioningKeys: PartitioningKeys,
-		})
-	} else {
-		PartitioningKeys := []string{}
-		for t := from; t.Before(to); t = t.AddDate(0, 1, 0) {
-			PartitioningKeys = append(PartitioningKeys, t.Format("2006-01"))
-		}
-		return u.db.GetTransactionsByUser(UserID, domain.GetTransactionHints{
-			PartitioningKeys: PartitioningKeys,
-		})
-	}
-}
-
-func (u Usecase) GetTransaction(transactionID string) (domain.Transaction, error) {
-	return u.db.GetTransaction(transactionID, domain.GetTransactionHints{})
-}
-
-func (u Usecase) UpdateTransaction(transaction domain.Transaction) error {
-	return u.db.UpdateTransaction(transaction)
-}
-
-func (u Usecase) NewItem(item domain.Item, user domain.User) error {
-	return u.db.NewItem(item)
-}