Throughout the codebase, multiple opportunities for code simplification were identified:

• In the _proposeBlock function, the local.params object has a zero anchorBlockId and timestamp for pre-fork blocks. This means that the first part of the condition, the postFork flag, is redundant when setting default values.
• This unchecked block does not wrap any math operations and can be removed.
• Since local.params.timestamp is set to the L1 block timestamp before the fork, it covers both conditions when setting the block's proposedAt field.
• This conditional statement is unnecessary because the computation returns zero when _amount is zero.
• This else block is redundant because the if case breaks out of the loop.
  To improve code maintainability and clarity, consider implementing the aforementioned simplification suggestions.