May 2026: Focused on reliability, security, and performance improvements for the bsv-blockchain/go-wallet-toolbox. Delivered two major features with direct business value and corresponding tests. 1) Transaction Reliability and Efficiency Improvements: robust retry logic for transaction proof timeout recovery and a tiered best-fit UTXO selection prioritizing mined UTXOs over unproven and sending UTXOs. Commits: 122cd82ad2362f30a4ff93b166c0368bc245ccf5; 56d16a6389cc03922fc3731423a1a3da1e98c2d3. 2) Security Hardening: stricter request body validation, tightened CORS, and a maximum request body size, with tests to validate these changes. Commit: d4d549265257afc4babb18d32e2db938558202b3. These changes reduce failure risk in transaction processing, strengthen the security posture, and improve maintainability. Technologies/skills demonstrated include Go-based wallet tooling, retry patterns, UTXO selection strategies, security validation, and test-driven development.

Concise monthly summary for 2026-03 focusing on security hardening and maintainability improvements in the wallet toolbox. Delivered a cryptographically secure RNG mitigation to address critical security hotspots, improving trust and reliability for production deployments. Enhanced code comments and documentation to support audits and onboarding, raising maintainability and review efficiency.

December 2025 — bitcoin-sv/spv-wallet-js-client: Repository synchronization and project file alignment with upstream source