A320 First Officer reported a high speed rejected takeoff due to an engine failure. The engine was shut down and the aircraft returned to the gate for maintenance.

Narrative

Departing Runway XXL. Initial takeoff normal. Airspeed alive call made. During takeoff roll we had an ECAM pop up. I believe this happened before 80 knots. I am unsure if I made the 80 knots power set call. Captain advanced thrust levers to TOGA. No continuing call made; but I understood the intention to go at TOGA. Engine 2 Engine Pressure Ratio (EPR) mode fault along with Engine 2 system fault at the bottom of the ECAM page. To be clear this is what the ECAM read after the Rejected Takeoff (RTO) as we had a chance to read it after stopping. Everything else seemed normal with the aircraft at this point. At this point an RTO thought popped into my mind. Being go minded this seemed like a reasonable response as the aircraft did not feel as if it was unable to fly. As we accelerated we heard a Bang. The Captain called reject and at this point the takeoff was rejected. This was during high speed regime. Unsure as to actual speed. No call made as I was distracted by the bang and ECAM. I advised tower that we were rejecting the takeoff and we taxied clear of the runway to a stop. Reading through the ECAM; we shut down Engine 2 and started the APU. A call to remain seated was made. I talked to the in-flight crew to see if they smelled or saw anything of concern. One crew member mentioned the smell of burnt rubber which I figured was somewhat normal as we had indeed heated up the brakes. After coordinating with company and ATC we proceeded back to the gate. We also; at this time made a PA to the cabin advising that we were returning to the gate. The aircraft taxied without any tactile indication that the tire was flat. Didn't find out about that until gate return. At the gate the Captain addressed the customers and told them as much as he knew about our next steps.