You should exercise care when using the Process Builder on the Chargent Order (or whichever Object Chargent is processing payments from and saving Transaction records to).
There are issues with the Process builder that can make it challenging to use with critical operations like Chargent Transaction records being saved to the Chargent Order.
Any error of the flow will cause failures in saving Transaction records. This can cause duplicate charges and inconsistency between Salesforce and your payment gateway (transactions successfully in your payment gateway, but not saved in Chargent).
Just like validation rules or required fields, we recommend testing the use of Process flows extensively.