**2. Conclusions**

Today, billions of dollars have been invested in cryptocurrencies whose core technology is blockchain, while solutions and techniques to effectively monitor existing blockchain networks are not well thought out and are almost nonexistent. The main reason is that few commercial use cases have not yet translated into blockchain production systems or that most smart contracts or cryptocurrencies are of the "fireforge" type (i.e., designating a crypto or smart contract whose postlaunch monitoring no longer requires the intervention of the platform operator). Furthermore, the decentralized nature of blockchain raises the following question: is monitoring of the entire blockchain network really necessary [18, 19]? What are the indicators that could be obtained if it were possible to propose an effective tool or methodology for monitoring the blockchain? Could these indicators be used for big data analysis [20]? Therefore, we proposed a framework for monitoring a blockchain system in a general way, based on several existing applications and system monitoring solutions

applicable to the blockchain ecosystem. In addition, the implementation of a blockchain monitoring system could detect anomalies or fraud throughout the system and, for example, reject transactions even before the blockchain records are updated.

The next step in our work would be to follow an approach that would allow us to design a model on a private blockchain to see the possibilities of exploitation, and to list all the information, logs, and statistics that can be used in a larger (public) blockchain.
