Author

M. Bartnicki

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Jul 2026

Modeling Decisions in Blockchain Analytics: A Leakage-Aware Evaluation of Tree-Based vs. Sequential Models

This work contributes a framework for leakage-aware Ethereum actor classification and a Transaction Grammar representation of wallet behavior, and demonstrates that, under leakage-aware evaluation, XGBoost outperforms Transformer-based sequence models while providing lower latency and estimated energy use.

M. Bartnicki, Jarosław A. Chudziak · arXiv.org · 0 citations

Jul 2026

Compression-Based Behavioral Similarity for Open-World Sybil Discovery on Ethereum

The method is positioned as a training-free local discovery primitive for open-world blockchain audits, rather than as a formal open-set recognition system, and contributes a leakage-aware behavioral framework for Sybil candidate discovery.

M. Bartnicki, Jarosław A. Chudziak · arXiv.org · 0 citations