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Evaluation of Large Language Models for Blockchain Transaction Explanation

Augusto, Stéphane, Heidi Elazab, Christophe Lebrun, Natkamon Tovanich, William J. Knottenbelt, Marco Mattavelli, Arnaud Gaudinat

Zenodo (CERN European Organization for Nuclear Research), 2026

Abstract

This repository contains the supplementary materials for the study “Evaluation of Large Language Models for Blockchain Transaction Explanation”. The work evaluates GPT-5 and Mistral 7B, with and without Retrieval-Augmented Generation (RAG), for explaining Ethereum transactions to non-expert users. The evaluation combines a 99-participant user study, LLM-based questionnaire assessment, and an independent expert review of factual reliability. The repository provides the prompts, n8n workflows, and evaluation materials required to reproduce the experimental setup. Repository Structure and Content : 1. Orchestration Workflows (n8n) Multilogue RAG.json & Multilogue Ingest.json: JSON files containing the modular n8n workflow definitions for the document ingestion pipeline and the RAG generation orchestration. 2. Prompts & System Messages system_message_rag & system_message_brut: Text files containing the exact system messages and fixed prompt templates used to generate the explanations in both RAG and non-RAG settings. 3. Evaluation Case Studies (Inputs)These files represent the exploratory controlled sample of four Ethereum cases used in the study : 1_transaction_0x1f754646.json & 2_transaction_0xc15f880c.json: Data for the standard ETH transfer transactions, used as low-complexity baselines. 3_transaction_0x6fac588d.json: Data for the complex DeFi token swap executed on the Uniswap V3 protocol. 4_dashboard.md & dune.PNG: Visual analysis materials based on a Dune Analytics…

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