Evgenii contributed to the nspcc-dev/neofs-node repository by addressing a bug in the N3 script verification process, focusing on BlockHeight compensation scenarios. He modified the backend logic to ensure that the verification now returns a persisted block number, which improves the accuracy and reliability of compensation calculations. This involved adjusting the index of a fake block header used during script verification, aligning the process with expected compensation behavior. Evgenii documented these changes in the project’s CHANGELOG.md, enhancing release traceability. His work utilized Go for backend development and incorporated smart contract concepts, demonstrating a focused and technically sound approach to problem-solving.