THE MAIN FEATURES OF BLOCKCHAIN TECHNOLOGIES CLASSIFICATION

This article discusses the main features of the classifications of blockchain technologies. Ten years after the first blockchain appeared, this technology is still largely experimental. It is difficult to predict the future of the blockchain industry and the technology itself with confidence, but its certain outlines are already emerging. The purpose of the study is to consider the classification of blockchain technologies and analyze the problems that arise when using these technologies. When writing the article, the authors used methods of collecting and studying individual facts, generalization, scientific abstraction, cognition of laws, as well as the methods of objectivity, concreteness, and pluralism. It has been proved that the legal regulation of blockchain technologies should be carried out through the development of uniform world standards and that prohibitions and restrictions on certain types of activities should be systematized and regulated at the international level. The study has concluded that three types of blockchain are used: public blockchains with open access (public blockchains), private blockchains with open access (consortium blockchains), and private blockchains with closed access (fully private blockchains). Following this typology, the authors have highlighted the main features of each blockchain category.