Fee should not be hardcoded, but loaded from fee schedule.
https://gitlab.com/PBSA/peerplays/-/blob/master/libraries/plugins/peerplays_sidechain/sidechain_net_handler.cpp#L592
https://gitlab.com/PBSA/peerplays/-/blob/master/libraries/plugins/peerplays_sidechain/sidechain_net_handler.cpp#L601