2025-12 monthly summary for erigon: Focused on improving RPC reliability and developer/product experience during node synchronization. Delivered a targeted bug fix to eth_getLogs to prevent empty results for unexecuted blocks, clarifying sync status and reducing confusion. Key technical change: implemented execution-state validation using GetLatestExecutedBlockNumber to ensure the entire requested block range has been executed before returning logs. If not executed, a descriptive error is returned to indicate sync status, rather than silent empty results. Impact: reduces user confusion during sync, improves logs reliability and tooling feedback, and strengthens API semantics under race conditions between block insertion and execution. Tech stack and practices demonstrated: Go RPC-layer changes, robust input validation, descriptive error messaging, and issue/PR traceability with #17624 and #17651. Commit: e5f4246b03c5a1dfeb8c7afd668250a99086bfaf.

March 2025 performance summary for duneanalytics/spellbook focusing on cross-chain data ingestion and analytics enhancements for CoW Protocol ETH-flow orders across Gnosis, Base, and Arbitrum.