February 2026 performance summary for erigon and related components. The month focused on delivering storage efficiency, API improvements for execution payloads, and robust error handling, while expanding test coverage to ensure stability across forks.

January 2026 — erigon: Performance and stability improvements focused on balance calculation, access lists, and concurrency safety. Delivered uint-based BAL encoding, nil-address handling, and optimized account state reads/writes, plus atomic commit counters and improved observability. These changes reduce runtime errors, improve validator throughput, and enhance observability for operators.

In 2025-12, delivered significant Amsterdam upgrade readiness for erigon, including Engine API extensions, data integrity improvements, and support for larger EIP-4844 blobs. These work items improve network reliability, upgrade readiness, and transaction capacity, while reducing risk via targeted BAL fixes.

Month 2025-11: Delivered Block Access List (BAL) Execution Integration in erigon, enabling tracking of address access during transaction execution to improve security, auditing, and telemetry. Aligns with BAL initiative (#18028) and establishes groundwork for enhanced governance and risk management.

October 2025 performance summary for the erigon development portfolio. Delivered core protocol enhancements, strengthened transaction validation, and expanded data-access capabilities across core and RPC layers. The work improved network reliability, security, and developer experience while advancing compatibility with external test suites and documentation standards.

September 2025 monthly summary for erigon focusing on delivering protocol readiness, network reliability, and developer efficiency. Key features delivered eth/69 P2P protocol support with robust sideprotocol handling in the sentry client, enabling improved data exchange and compatibility across the network. Enabled eth/69 in the Erigon client while preserving backward compatibility for existing tests by updating the default configuration to include eth/69 alongside eth/68. Fixed a bug in GoodPeers accounting by refactoring the handshake flow to create peerInfo after a successful handshake and temporarily storing handshake data, improving peer-tracking reliability and reducing stale peers after failed handshakes. Overall, these efforts advance network interoperability, protocol readiness, and stability, translating to smoother upgrades, more reliable tests, and stronger peer management.

Summary for 2025-08: Delivered Witness P2P protocol support with stateless witness data exchange and direct RLP encoding, including flags, message types, storage, retrieval, and network communication. Also removed witness compression in favor of direct RLP encoding for all witnesses. Improved CI reliability by running database migrations before RPC integration tests to ensure tests operate on up-to-date MDBX schema, reducing false negatives due to schema-desynchronization. Overall, these changes strengthen network protocol robustness, reduce CI churn, and accelerate release readiness.

July 2025: Focused on stabilizing RPC test logging by delivering a critical log indexing fix in the erigontech/rpc-tests repo. This patch improves stability and accuracy of log handling, reducing flaky test results. Implemented via commit 62b7533f3ac4175ecd90cba20e4712731dc3dc3d (fix logindex #420).

May 2025: Focused on stabilizing Account Abstraction (AA) gas estimation and strengthening standard validation compliance for erigon. Delivered a new ERC-7562 tracer for AA validation, replaced the legacy validation_rules.go with validation_rules_tracer.go, and integrated the tracer into ethbackend.go to enforce ERC-7562 rules. Fixed RIP-7560 gas estimation and AA transaction handling, addressing gas initialization during state transitions and type assertions to reduce mispriced transactions and errors. These changes improve reliability, accuracy, and regulatory compliance, enabling better user experience and throughput.

April 2025 performance month for erigon: Delivered RIP-7560 Account Abstraction (AA) transaction support and mining loop enhancements, including refactored AA execution path, improved validation, and end-to-end tracing; fixed critical EVM tracer lifecycle crash and Polygon tracing issues; completed dependency updates and removed Bor-specific txlookup transformation to simplify stage_txlookup. These efforts deliver key business value by enabling new AA workflows, improving mining integration, and increasing tracing reliability while reducing maintenance overhead.

Concise monthly summary for 2025-03 across erigontech/rpc-tests and erigon, focusing on delivering business value and technical outcomes. Highlights include expanded testing coverage for Polygon PoS integration, groundwork for Account Abstraction (AA) support, enhanced tracing and state synchronization observability, improved real-time performance metrics, and stabilization efforts to boost test reliability and data quality.

February 2025 performance summary highlighting key architectural refactors, reliability improvements, and observability enhancements across two repos: 0xPolygonHermez/cdk-erigon and erigontech/erigon. The work focused on centralizing crypto primitives for reuse, hardening the mempool against duplicate authorizations, reducing API payloads, and improving data integrity and error reporting. These efforts deliver concrete business value in terms of maintainability, system reliability, and developer experience.

January 2025: Delivered key features and reliability improvements across erigon and Polygon integration to improve business value, data accuracy, and security. Highlights include API reliability and block data accuracy improvements for Polygon, centralized gas pricing logic in erigon-lib, and security hardening to mitigate known CVEs and EIP-7702 risks. Improvements in reliability/observability and network activity detection bolster production stability and incident response.

December 2024 monthly summary for erigontech/erigon focusing on delivering reliability improvements for Polygon Bridge and cross-file API refactors with measurable business value.

November 2024 — Focused on codebase hygiene for erigon. Delivered a targeted cleanup by removing the unused bridge_client.go, which previously contained a direct bridge client implementation. This reduces code complexity, maintenance overhead, and risk of regressions in bridge-related paths. The change is isolated with a single commit (1d32839451e94f2f6cc537deceb5bfd2e1497a8b); no public API changes. No major bugs fixed this month; the work focuses on long-term maintainability and velocity for future features.

Concise monthly summary for 2024-10 focused on delivering business value through feature work and reliability improvements in erigon (erigontech/erigon).