That’s not how you’d do it. You can refund anyone who made purchases during the time frame you want to roll back since I highly doubt the game state database is the same as the microtransactions database. Then you revert the server to its previous state. Everyone loses everything they did during the rollback period but the server is stable as it was at the earlier time and in the original state.

Also wow added microtransactions in 2010 and they definitely had rollbacks after they added the microtransaction because it happened to my character once in Mist of Pandaria.