The legacy DecidirV1 connector uses an internal method to calculate the fields CSPTGRANDTOTALAMOUNT and CSITTOTALAMOUNT, which is the product between the product value and quantity. This approach results in a string with two decimal places. Consequently, when the product price contains more than two decimals, the value of the field CSPTGRANDTOTALAMOUNT diverges since it's the payment value itself.

Place an order using decidirV1 with a product in the cart with a price that has more than 3 decimals.

To avoid such discrepancies, we recommend using products with a maximum of two decimal places or modifying the checkout cart to eliminate the use of decimals.