diff options
Diffstat (limited to 'lib/operation.ml')
| -rw-r--r-- | lib/operation.ml | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/operation.ml b/lib/operation.ml index bce6ac2..54962fd 100644 --- a/lib/operation.ml +++ b/lib/operation.ml @@ -47,7 +47,7 @@ let decoder : transaction_op Utils.Decoder.decoder = <|> literal "d" *> return (fun p -> `Debit p) in (fun value transaction_type description -> transaction_type { value; description }) - <$> ("valor" <: int) + <$> ("valor" <: (int >>= fun x -> if x >= 0 then return x else fail)) <*> ("tipo" <: transaction_type_decoder) <*> ("descricao" <: (string |