Since sygma-optimism-module is a package it will require writing some extra code to get it running alongside chainbridge-core. Here you can find some examples Example

Differences Between EVM and Optimism module

Though Optimism is an EVM-compatible chain, it needs additional checks to verify transaction batches before submitting votes, and therefore is deserving of its own separate module.

The differences pertain to OptimismClient which returns only verified blocks when querying latest block.

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