A transaction already approved (and in some cases captured) receives a cancellation request directly from the checkout:

An external application called to cancel this transaction Id = with Value RequestId = . Priority: default. Author: vtex-service::checkout::stable. This cancellation request occurs due to a timeout when the checkout calls the payments route from the gateway, and the service takes too long to respond.

This happens when the newGatewayCallback method is triggered at two different points in the order flow:

1. During the order processing stage – when the endpoint gatewayCallback/{orderGroup} is called.
2. After the payment authorization – when the endpoint gatewayCallback/{orderGroup}/{messageCode} is called.

In both cases, the newGatewayCallback performs a request to the payment gateway. If the gateway takes too long to respond, the same type of timeout error can occur in either scenario.

To clarify further:

• The first call is a POST request to gatewayCallback, which occurs right after the user completes the checkout process.
• The second call is a GET request to gatewayCallback, which is triggered during payment confirmation – this is when the shopper is redirected to the "Order Placed" screen.

Simulation

Simulation is not possible.

Workaround

No workaround available.