NormalizeL2GasForL1GasInitial is for testing, adjusts an L2 gas amount that represents L1 gas spending, to compensate for the difference between the assumed L2 base fee and the actual initial L2 base fee.

EphemeralErrorHandler handles errors that are ephemeral in nature i.h these are errors that we would like to log as a warning unless they repeat for more than a certain duration of time.