Pull request overview

This PR optimizes the _get_last_event method in the ContractWrapper class by introducing concurrent batch processing of block ranges. The optimization changes from a sequential scan through block ranges to a concurrent batch-based approach that can fetch multiple chunks in parallel, significantly speeding up the operation when events are sparse or located in older blocks.

Changes:

• Added itertools import to support batch processing
• Refactored _get_last_event to build all chunk ranges upfront and process them in concurrent batches
• Introduced a nested fetch_chunk async function to encapsulate the event fetching logic

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.