Monica Chen contributed to the AurevoirXavier/polkadot-sdk repository by developing a feature that improves gas estimation accuracy during transaction dry-runs. She implemented a configurable block timestamp override within the pallet-revive module, allowing developers to simulate transactions with greater fidelity by aligning the simulated block time. This approach enhances the reliability of gas calculations and supports safer, faster iteration in testing environments. Working primarily with Rust and leveraging her expertise in Substrate and Ethereum, Monica’s work focused on minimizing regression risk while laying the foundation for future gas-usage analytics. The feature was well-documented and integrated smoothly into existing development workflows.