"At the time of writing of this thesis, both implementations run in production on the Bitcoin Cash testnet chain and have been running for over 3 months"
"Our software is production-grade and we release it under the open source MIT license."
The median Bitcoin Cash fee per byte at the time of writing (November 2018) is 1 satoshi. Multiplied by our transaction size this gives us a transaction fee of 244 satoshis.