Blockchain Papers

Pavlo Mykolaiovych Rubanov, Olga Girzheva, Larysa Ivashko, Ігор Брітченко

No abstract is available for this record.

Світлана Анатоліївна Дяченко

This research revealed the essence of digitalization in the field of local finances of Ukraine as a mechanism for the democratization of public administration and determined the features of its practical support. The research was carried out with the help of modern theoretical and cognitive methods, the dialectics of the processes of state administration and local self-government under the conditions of financial decentralization and digitalization. The purpose of the conducted research is the scientific and theoretical justification of the development of digitalization in the field of local finances of Ukraine as a mechanism for the democratization of public administration and the development of practical recommendations for their improvement. Practical implication. The main aspects of the development of digitalization and the expansion of access of the territorial community to the process of managing local finances in the conditions of decentralization of power have been studied. The current state of digitization of local finance management is analyzed from the point of view of filling electronic platforms and programs with hardware capabilities. The directions and necessary conditions for improving the efficiency of local finance management by all members of the territorial community using the digitization mechanism have been determined. Value/originality. Developed the mechanism of financial decentralization using digitization tools, which is accompanied by appropriate software and hardware, characterized by the complex application of modern information and communication technologies, which significantly increases the efficiency and effectiveness of the implementation of local financial programs, the quality of control over expenses, the filling of local budgets. It was concluded that the digitization mechanism in the field of local finances introduces an important trend – the transition from public control to public initiative. The expansion of forms of electronic democracy with the help of technological capabilities significantly expands the community’s access to public administration services in real time, which increases the rationality of using local financial resources. By its content, this is a way of practical implementation of participatory democracy in Ukraine.

A.V. Yanovytska

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Volodymyr Mishchenko

The work examines the main trends in the functioning of the domestic IT sector and the formation and development of digital infrastructure. The main directions of the digital transformation of the national economy include support and stimulation of the development of the IT sector, development of the national digital infrastructure, expansion of the scale of digitization of business, state administration, social sphere and livelihood of the population, as well as the development of digital skills and digital culture of citizens in order to overcome the “digital divide”. It has been proven that digital infrastructure should be considered as an interconnected set of technical and technological means, software, services and processes that ensure the use of IR technologies in all sectors of the economy and spheres of social life. According to the performed functions and tasks, two types of digital infrastructure are distinguished – technical-technological and software-service, which, constantly developing and becoming more complicated, support and complement each other. It was determined that the main criteria for assessing the level of development of digital infrastructure should be compliance with technical, technological, ethical and regulatory standards, systematicity, complexity, transparency, controllability, legitimacy and inclusiveness. The need to ensure effective state regulation, supervision and control over the functioning of the national digital infrastructure as a component of the state’s digital sovereignty has been proven. It was determined that the development of the national digital infrastructure should become a strategic priority of the state, and its main objects should be broadband Internet, 5G mobile communication, the infrastructure of the Internet of Things and cyber security, as well as “Industry 4.0”. It has been proven that in order to combine centralized and decentralized management mechanisms for the processes of formation and development of digital infrastructure, it is necessary to use a system approach that ensures a high level of functionality of all technical and technological components of digital infrastructure, programs and services. The main principles of the introduction and use of the “Industry 4.0” technology and promising sectors of the domestic economy for its implementation are determined. The potential sources and forms of financing the development of the IT sector and the development of IR technologies are characterized.

Ігор Гонак

Introduction. Economic development of Ukraine in the third decade of the 21st century largely depends on the development of digital technologies, on which the cryptocurrency busi­ness directly depends. According to the Index proposed by chainalysis.com, Ukraine is one of the leaders in the world and the undisputed leader in Europe in the adoption of cryptocurrencies. This became possible thanks to the active development of financial and information technol­ogies in Ukraine, and the financial, economic and military-political crises only give additional impetus to the development of the cryptocurrency business due to its global nature and full or indirect independence from attempts at state regulation. One of the areas of cryptocurrency business development is cryptocurrency mining. The purpose of the article is to reveal the algorithm of conducting business in the field of cryptocurrency mining and the economic efficiency of mining in Ukraine and the possibility of its impact on economic growth in the country. Results. Cryptocurrency mining is the process of creating cryptocurrency coins. It has been investigated that the cryptocurrency mining process is not a financial pyramid or some kind of virtual game, but is one of the newest types of business activity, which requires significant the­oretical and practical economic and technical knowledge, is economically expedient both in the short and long term. When mining, you can use a variety of computer equipment, depending on the miner’s economic tasks and desired results. ASIC equipment has been developed for mining on an industrial scale. Cloud mining is used for investing. If there is no knowledge about mining and limited financial resources, you should use browser mining or mine on your own PC, laptop or smartphone. However, the most efficient and widespread mining takes place on video cards. It was found to be a by-product of mining. It is estimated that there is a slight correlation between the earnings of miners on the Ethermine mining pool and the daily mining profit. Conclusions. Although the history of cryptocurrency business is only one and a half decades, mining, as an object of business activity in Ukraine, is a significant economically effective type of business activity, which is noted in the world rating of the perception of cryptocurrencies, according to which Ukraine is one of the world leaders. Attempts to implement legal regulation of cryptocurren­cy mining both in Ukraine and in other countries, and its gradual implementation do not significantly harm the creation, distribution and use of cryptocurrency coins, however, will create transformed conditions for the economic attractiveness of cryptocurrency mining as business objects.

Bogdan Derevyanko, Olha Turkot

The paper aims to study some aspects of the legal regulation of relations with cryptocurrency in Ukraine and the EU and suggest improvements for Ukrainian legislation on virtual assets.

Валерій Тарасов

The article is to research the possibilities and prospects of using graphical technical analysis for forecasting the movement of asset prices by an Internet trader using the example of Bitcoin (BTC – BitCoin). The theoretical and methodological aspects of cryptocurrency technical analysis in the conditions of modern financial markets were analyzed. A comparative analysis of short- and medium-term technical analysis strategies in Internet trading was carried out. Cryptocurrency-applied technical analysis was used to determine current trends of the Bitcoin growth cycle. The research methods included comparative analysis, and graphical and analytical methods of technical analysis such as the method of observing price movement, capitalization analysis, pattern identification, support/resistance levels identification, indicators use and comparison, and bars analysis (Japanese candles). Cryptocurrency analysis used the Traidingview platform data from BINANCE, BITSTAMP and CRYPTOCAP exchanges. Considering the example of the analysis of the medium-term agreement with patterns and indicators of the BTC instrument, the most likely movement of the asset price is calculated in several stages. In the first stage, the classification of analysis tools and the possibility of applying several of them were investigated. The second stage involved analyzing the difference and risk of using different time frames for investment and finding rational ways of applying the available information to analyze the subsequent deal. In the third stage, a comparative analysis of the transaction with the BTC instrument was carried out, and the likely movement of the cryptocurrency price was determined. Based on the research, the only possible scenario for the behavior of the BTC instrument has been developed, namely: a drop in price and accumulation in the further bearish market. It is substantiated that the best option for analysis is the collection of all available information from the chart and its further analytical summation to obtain the most likely trend of the instrument's movement, as well as the analysis of the speculative value of the deal. The considered approaches to the technical analysis of the Bitcoin cycle create a scientifically based practical tool for Internet trading.

Bohdan Strilets

The author analyzes the existing legal regulation of relations related to the use, issuance, trade and other operations with cryptocurrencies in the European Union law. It was noted that the development of cryptocurrency markets in the EU requires a well-built legal framework clearly defining the regulation regime for all cryptocurrencies that are not subject to current legislation on financial services. The main directions of regulatory influence on the cryptocurrency market in some EU Member States are identified. The problems of the system of legal acts covering legal relations with cryptocurrencies are analyzed. It was stated that creating a high-quality and effective legal framework within the EU internal market is an extremely important though challenging task. Perspective directions of legal regulation of crypto-assets according to the Proposal for a Regulation of the European Parliament and of the Council on Markets in Crypto-assets, and amending Directive (EU) 2019/1937, COM/2020/593 final, are analyzed. When analyzing the draft Regulation, it was found that its adoption would be an important step towards maximum harmonization of cryptocurrency legislation. A number of problems of the future legal act have been revealed. These include ambiguous legal regulation of cryptocurrency market participants’ cybersecurity. In addition, the legislative bodies should bear in mind that cryptocurrencies are in the process of constant transformation and transition from one type of token to another. In this case, the rules of the upcoming Regulation should be more flexible to future changes. It was concluded that according to the current draft Regulation, it is extremely unlikely that any types of crypto-assets will remain unregulated in the EU.

Сергій Михайлович Фролов, Volodymyr Orlov, Regional State Administration, Yevhenii Kozmenko

The paper notes that at the present stage, research primarily by foreign scientists defines decentralized finance as based on the cryptocurrency ecosystem. The development of new financial technologies, which led to the emergence of digital currency, and its attractiveness, primarily as an asset for investment, have already formed a certain ecosystem of cryptocurrencies. In particular, the functioning of crypto-exchanges, which include various participants: issuers providing mining, agents and a kind of intermediaries in cryptocurrency transactions during the circulation of stablecoins. The dynamics of market capitalization of cryptoassets was analyzed according to the statistics of the International Monetary Fund (IMF), which increased more than 10.5 times (from USD 191.6 bln at the beginning of 2020 to USD 2,027.5 bln as of the end of September 2021). At the same time, it should be noted that the structure of the cryptocurrency market is unstable, which is typical for the new market that is in its infancy. This is confirmed by the market capitalization structure of bitcoin, ethereum, and stablecoins for the above period. Based on IMF data, indicators characterizing the state of formation of the cryptocurrency ecosystem, namely, bitcoin volatility and market capitalization of tokens, are analyzed. It is noted that the fairly rapid spread in the global financial space, and especially the growing attractiveness of cryptocurrencies in emerging financial markets, require the study of possible risks, arising from the formation of an ecosystem of cryptocurrencies and decentralized finance to ensure the stability of the centralized financial system. The main financial stability risks associated with the cryptocurrency ecosystem are systematized and grouped into key blocks: operational risk, cyber risk, misappropriation, bribery and corruption, as well as risks related to financial imbalances. The emphasis is on a problem that is formed purely in the field of decentralized finance and is associated with the development of peer-to-peer lending, crowdfunding and crowdinvesting. A generalization is made about the understanding of the ecosystem in the financial system (financial ecosystem), which is used in modern research at two levels: at the micro level it reflects the business model of a financial institution, and at the macro level it reflects the transformation of the financial system under the influence of financial technology. The formation of the financial ecosystem was the result of the intensive development of financial technologies (FinTech), among which neobanks are the most popular today. In addition, a classification of neobanks is proposed with an emphasis on the level of digitalization.

Ihor Honak, Stepan Babii

Purpose. The aim of the article is to study types of cryptocurrency wallets, their features and advantages. Methodology of research. The following special research methods were used during the writing of the article: direct observation was carried out – collection of information about the number of addresses and the value of Bitcoin crypto-coins; the graphic method of constructing the Lorenz curve is applied; generalization – in the process of formulating conclusions based on the results of the conducted analysis. Findings. It has been established that when carrying out cryptocurrency business in any form (mining, trading, investing), in order to receive or send cryptocurrency coins, it is necessary to register a cryptocurrency wallet, which is a tool that can be used to interact with the blockchain network, and has an address that is an alphanumeric identifier created on the basis of public and private keys (such an address is, in fact, a “place” in the blockchain where it is possible to send cryptocurrencies). It was found that there are a large number of different wallets on the cryptocurrency market, which can be divided into five groups: electronic wallets (web wallets), which are created on cryptocurrency exchanges or online exchanges; desktop cryptowallets, which is a program that is downloaded and run locally on a personal computer and this program can be downloaded from public sites (desktop wallets are of two types: “thin” (crypto wallets enable the crypto user to quickly carry out transactions, however, have a limited amount of options) and “thick” (represent a full-fledged program with a significant amount of functions and, in particular, with the possibility of mining); smartphone versions (mobile wallets) have advantages and disadvantages similar to desktop cryptowallets; hardware cryptocurrency wallets, which is a physical electronic device, uses a random number generator (RNG) to generate public or private keys and can be stored in the device itself, not connected to the Internet (is a type of cold crypto wallet and is recognized as practically the safest crypto wallet); crypto wallets on a paper medium - mediums the size of a banknote, on which a private key in the form of a QR code and a public access key (crypto address) are placed, and in order to carry out transactions with cryptocurrency coins, these codes must be scanned. Originality. The basic requirements for ensuring the optimal security of an economic entity in working with cryptocurrency wallets have been formed, compliance with which will enable: secure access to the cryptocurrency wallet; withdrawal address management; ensuring effective protection of private access keys to the cryptocurrency wallet. Practical value. In the author’s opinion, with insufficient study of the advantages and disadvantages of various cryptocurrency wallets and non-compliance with security rules when registering a crypto wallet and accessing it, restoring unhindered access to wallet assets will be problematic due to the extremely strong protection of cryptocurrency wallets from cyber criminals. The obtained research results will be useful for application in the practical activities of conducting cryptocurrency business. Key words: cryptocurrency, cryptocurrency wallet, crypto wallet, Bitcoin, cold crypto wallet, hot crypto wallet.

Valerii Yatsenko, B. Kovalov, Olexandr V. Kubatko, Mykola Oleksiiovych Kharchenko · 6 authors

Smart contracts are one of the digital technologies that have the potential to significantly alter the way market participants interact. It is emphasized in the research that a smart contract is a specialized computer protocol that allows negotiating parties to exchange assets between themselves: stocks, money, or property without involving a third party as an intermediary. It should be noted that smart contracts also have a wide area for use not only in the financial sector, but also in other sectors of the economy, and the global trend towards digitalization is one of the fundamental drivers of the development of this tool. The most recognizable technology for the operation of smart contracts today is blockchain. It is mentioned that blockchain guarantees the reliability and security of the concluded contracts in terms of their confidentiality, immutability, and permanence. Four basic stages of a blockchain-based smart contract were revealed. It is stated in the article that one of the most promising applications for smart contracts is the automation of the provision of banking services, such as supply chain financing, mortgage lending and small business lending. The automatic implementation of the full lending process, from application to credit risk assessment, mortgage renewals, title transfer, and mortgage servicing and securitization, can be facilitated by sharing borrower information and digital versions of multiple registries and title documents.It is emphasized that smart contracts have a number of advantages over traditional paper-based contracts. It's important to remember that no matter how advanced technology gets, there's always the risk of IT-system vulnerabilities. The future of smart contracts in banking was forecasted. Many banking processes and legal agreements will be substituted by blockchain-based finance solutions in the future; however the shift will be slow. Incumbent banking institutions are unlikely to completely relinquish control of their databases from unknown third parties. Most likely, groups of banking institutions will use authorized blockchains, and customers will only interact with trusted nodes, and not directly with the ledger.

Maryana Bortnikova, Yuliia CHYRKOVA

The emergence of cryptocurrencies and blockchain technology, the development of information technologies and international electronic commerce have led to the formation of a new type of civil law contracts, namely smart contracts. The use of mathematical algorithms in the implementation of smart contracts contributes to reducing the costs of organizing business relations, speeding up the implementation of agreements between business partners and increasing the level of security in the process of their cooperation. Investigating the issue of conclusion and implementation of smart contracts, its key elements are given, namely: the parties to the contract, who, on the basis of an electronic digital signature, agree or reject previous agreements; the subject of the contract and the availability of tools necessary for its implementation; an algorithm that accurately describes the conditions for executing a smart contract; a decentralized platform in which the algorithm of the smart contract itself is written, the algorithm in which the specific conditions for the execution of the smart contract are described. The article highlights the program-coordinating, protective, guarantee and security functions of smart contracts. The comparative characteristics of a smart contract with a civil law contract are given. The main advantages and disadvantages of the formation and implementation of smart contracts in Ukraine are grouped. The conclusion of smart contracts in Ukraine entails certain risks associated with the legal regulation of such contracts, in particular when determining their legal status. A technology for the development and signing of a smart contract as an innovative tool for contractual relations has been formed, which provides for the implementation of the following stages: determining business conditions and requirements for a smart contract, choosing a blockchain platform, selecting tools for developing a smart contract, developing a smart contract and auditing smart contract, deploying and signing a smart contract. Smart contracts are successfully used in various fields, such as: international settlements, securities transactions, banking, real estate, international e-commerce, recruiting, insurance, marketing and logistics, public and administrative services, agricultural sector, energy, medicine, etc.

Walter Spaeth, Tomáš Peráček

No abstract is available for this record.

Yuliia Khudolii, Bohdan Taranets

The rapid development of technologies, their impact on the speed of decision-making, and changes in communication methods have a significant impact on the financial sector, namely on payment systems. In addition to the technological transformation of the payment systems themselves, these changes are transforming the requirements of users who want transfers to be faster, safer, and more reliable. On the international market, the processes of change began several years ago, now they have begun to take place in Ukraine as well. This actualizes the need to assess the current state of the payment system in Ukraine, as well as to study those technologies that have the greatest prospects and significant impact on the payment space. For this purpose, in this study, we assessed the current state and trends in the functioning of the payment system of Ukraine. We investigated its main participants, such as the System of Electronic Payments of the National Bank of Ukraine (SEP), PROSTIR National Payment System, the dynamics of the main indicators. This made it possible to identify and substantiate the main problems and obstacles to the development of the payment system of Ukraine. Among the main ones, we attributed: monopolization of the payment market by international payment systems (IPS), insufficient level of consumer protection and shortcomings of legislation on market regulation, insufficient level of payment and financial literacy, especially of certain categories of the population (pensioners). An overview of the main trends in the development of payment systems under the influence of digitalization and innovation made it possible to identify the most significant technologies. Namely, real-time payments (RTP), SWIFT gpi, artificial intelligence, and machine learning, blockchain, and distributed ledger technology (DLT). In our opinion, these innovations themselves will make payment systems safer, more efficient, transparent, and cost-effective. But it is worth noting that the implementation of technologies is impossible without the complete digitalization of all payments and related services. Therefore, the main direction of increasing the efficiency of the functioning of the payment system of Ukraine is the transfer of the majority of payments to digital format. We believe this can be realized through high-quality coordination of all participants in the payment market, clear and timely implementation of the roadmap for changes, ensuring free and easy access to payment services for all users (financial inclusion), increasing the payment literacy of the population, creating conditions for expanding the payment infrastructure.

Olesia Suntsova

One of the essential features of the new economy (neo-economy) is the increasing use of information and communication technologies, which led to the emergence and spread of the concept of "digitalization" as a process of digitalization, which is gradually formed within the post-industrial period of economic development. technical progress and innovative management methods, intellectualization of human capital, the use of advanced technologies, accelerated development of knowledge-intensive industries, giving priority to the production of knowledge and services, the mentality of creative, efficient, rational business. The vision of changes in taxation regarding the inclusion of blockchain technologies in the sphere of tax policy and introduction of taxation of tax differences of their exchange rate, as well as digitalization of cryptocurrency detection and taxation processes in Ukraine, which are currently outside the Tax Code of Ukraine. The world has changed significantly over the last decade. We live in an era of accelerating pace due to the rapid development of high technology. Traditional working tools used for years are losing relevance or disappearing altogether. Digital transformation, as a global trend, is steadily penetrating all industries. It affects both the most innovative and completely conservative areas. First of all, the client changes, both internal and external, his expectations, preferences and requirements. It forms a new demand, which must symmetrically correspond to supply. In the conditions of modification of the external environment there is an urgent need to reorient to modern methods of doing business. Only those companies that immediately translate their services into a more convenient and capacious mobile format of interaction with the client, will win the competition. Online retail and Internet banking, booking tickets and tours with aggregators or calling a taxi through mobile applications have become a reality of everyday life. According to Hampleton Partners, an international consulting firm specializing in technology mergers and acquisitions, the annual volume of transactions for the use of blockchain technology alone will be $6 billion. Many classic business models are giving way to technological innovation. The main message for businesses: "Upgrade or disappear", to which the modern tax system must also be adapted.

Babajide Oluwaseun Olaogun, Adaobu Amini-Philips, Ahmed K. Ibrahim

The rapid evolution of digital currencies and blockchain technologies has created opportunities and challenges in the context of global trade. Traditional fiat payment systems, while widely adopted and regulated, often face limitations in cross-border transactions, including high fees, delayed settlements, and limited transparency. Conversely, cryptocurrency and stablecoin-based platforms offer faster and more transparent mechanisms but remain fragmented and lack integration with established financial infrastructures. This proposes an interoperability concept for connecting fiat and crypto payment platforms to facilitate efficient, secure, and cost-effective international trade settlements. The conceptual framework emphasizes a hybrid architecture that bridges fiat processors, crypto wallets, and exchange gateways through an interoperability layer. This layer employs technical mechanisms such as atomic swaps, cross-chain settlement protocols, and smart contract automation to enable seamless conversion, routing, and reconciliation of transactions. Operational considerations, including transaction monitoring, liquidity management, and real-time reporting, are integrated to ensure reliability and mitigate operational risk. Regulatory alignment is central to the framework, addressing anti-money laundering (AML), know-your-customer (KYC), tax compliance, and cross-jurisdictional legal requirements. The model further incorporates risk assessment mechanisms to manage foreign exchange volatility, crypto price fluctuations, and system-level vulnerabilities. Evaluation metrics focus on efficiency, cost-effectiveness, transparency, and transaction reliability, providing actionable insights for stakeholders including financial institutions, multinational corporations, and payment service providers. Additionally, the framework lays the groundwork for future research involving AI-driven predictive analytics, multi-chain decentralized finance (DeFi) integration, and standardized protocols for global regulatory harmonization. By establishing a structured approach to fiat-crypto interoperability, this concept enables faster, more transparent, and resilient international payments. It facilitates strategic decision-making, reduces transactional friction, and supports the evolution of a unified, hybrid global payment ecosystem that aligns technological innovation with operational and regulatory requirements.

Svitlana Skrypnyk, Hanna Holovchak, Іnesa Shepel

The aim of the article is original research on modern conceptual frameworks and approaches, the mechanism for regulating the cryptocurrency market in foreign countries, in particular research on current practice around the world virtual money accounting procedure and taxation. The methodology of the survey. Comparison, methods of abstraction, analysis and generalization, graphic and tabular modeling are the research methods which were used in the article. The scientific novelty. It is defined, that the world experience in regulating the cryptocurrency market is more progressive than on domestic practice. Accordingly, research and borrowing of the best world management practices on the cryptocurrency accounting operations and taxation can be important for Ukrainian Government as an integral step in the evolution of the legislative framework, which will provide efficiency and transparency of mechanism for the regulation of cryptocurrency operations and electronic payments in Ukraine. That experience is especially important to Ukraine, since the Government have selected way to European integration. Moreover, the need to analyze of foreign practices cryptocurrency accounting and taxation are linked with the capacity to use it to solve different tasks by Ukrainian public authorities: first of all, to determine the most effective tools for cryptocurrency market regulation; and, secondly, to improvement of Government regulation into account the best world management practices. Conclusion. It is defined, that the world practices of regulating the cryptocurrency accounting operations and taxation are highly varied, reflecting the specific public management and State politics of the various countries, for example, a significantly different legal framework, evolution of the digital transformation and divide, features in the area of financial management and monitoring and other. In this science work countries were divided into groups: which are where operation with cryptocurrency is legitimate and national Government has steadily developed cryptocurrency market using the administrative and economic (first of all fiscal) instruments and which are where operation with cryptocurrency aren’t legitimate or don’t have legislative. Some of the exposure risks connected with the cryptocurrency accounting operations and taxation and legalization of the cryptocurrency as means of payment were identified by authors. Key words: cryptocurrency taxation, cryptocurrency accounting operations, virtual money, Government regulation, risks

Ihor Honak

The article is devoted to the study of theoretical and practical aspects of the risks that accompany the activities of economic actors in the cryptocurrency market (both mining and trading) at the micro­ and macro­economic level at the beginning of the third decade of the XXI century. The risks associated with the functioning of economic entities in the market of cryptocurrency coins and such risks are the following: lack of legal regulation on the cryptocurrency market and insurance of owners of assets stored on crypto wallets; use of malware in order to access assets rotating on the cryptocurrency market; hacking attacks on cryptocurrency wallets and exchanges in order to steal cryptoassets; loss of assets deposited into accounts of cryptocurrency exchanges in case of bank-ruptcy or closure of these exchanges; loss of the password used to access the crypto wallet; loss of a secret personal PIN code, which is the key to access funds deposited into the crypto wallet at the exchange and used to transfer assets (cryptocurrencies or fiat currencies) to other crypto wallets or a bank card; erroneous transaction due to one number or letter mistake when transferring from one crypto wallet to another or error (when entering bank card number), when transferring funds from crypto wallet to bank card, a mistake of one or more numbers is possible and funds will be transferred to the wrong addressee, in both cases it is impos-sible to cancel the transaction and funds are lost irrevocably; significant volatility in the value of cryptocurrencies, because of which an investor can go bankrupt. It was revealed that the functioning of the cryptocurrency market is also associated with risks to the national economy and security: monetary policy (reduction of control over monetary circulation due to the replacement of national fiat currency with cryptocurrency coins and the loss of the central bank monopoly on the emission of money and reducing the country's income from seigniorage due to mining cryptocurrencies), financial stability (because of the threat of the outflow of deposits from the banking system and replacing them with investments in cryptocurrencies, the possibility of replacing traditional banking, as well as the possibility of avoiding taxation and shadowing the economy) and national security. It has been proven that the intensive activity of an economic entity associated with mining, trading, investing or other economic activities in the cryptocurrency market requires significant theoretical and practical training of the individual and patience and faith in the future of cryptocurrency market activity because of the probability of losing savings invested in cryptocurrencies or investments.Keywords: risk, cryptocurrency, cryptocurrency market, crypto coin, crypto wallet, Bitcoin, Ethereum, cyberattack. Статтю присвячено дослідженню ризиків, які супроводжують діяльність ринку криптовалют, як майнінгу, так і трейдингу. Охарактеризовано ризики, з якими пов’язане функціонування ринку криптовалют, і такими ризиками є: відсутність правового регулювання та страхування власників криптогаманців; використання шкідливих програм та здійснення хакерських атак на криптогаманці і біржі криптовалют; утрата активів, розміщених на рахунках криптовалютних бірж, у разі банкрутства чи закриття цих бірж; утрата паролю від криптогаманця чи втрата секретного персонального PIN­коду, що є ключем доступу до коштів, розміщених на криптогаманці на біржі; помилкова транзакція (через помилку на одну цифру чи букву) під час переказу з одного криптогаманця до іншого (також під час переказу грошових коштів із криптогаманця на банківську картку можлива помилка на одну чи кілька цифр, і кошти будуть переказані не тому адресанту, якому вони передбачалися); значна волатильність вартості криптовалют. Виявлено, що функціонування ринку криптовалют пов’язане з ризиками для національної економіки: монетарної політики, фі-нансової стабільності, інвестиційної та банківської діяльності. Доведено, що активна діяльність економічного суб’єкта, пов’язана з майнінгом, торгівлею, інвестуванням чи іншою економічною діяльністю на ринку криптовалют, вимагає значної теоретичної і практичної підготовки особи через імовірність утратити заощадження, вкладені у криптоферми чи інвестиції.Ключові слова: ризик, криптовалюта, крипторинок, криптомонета, криптогаманець, Bitcoin, Ethereum, хакерська атака.

OLENA KRAVCHENKO, OLEKSII SHAPOVAL, NATALIA NEBABA, ROSTISLAV BOTVINOV

The article investigates the origin and development of distributed registry technology – blockchain. It serves as a database and is a reliable form of information storage. The global application of blockchain technology is widespread. Such countries using blockchain as USA, Estonia, Germany, Japan, Great Britain, UAE were analyzed. The technology is used in various industries and spheres of activity: public administration, non-cash payments, financial and production activities, the sphere of various professional services, the sphere of social security, etc. This allows to simplify activities and improve the level of state development. Ukraine is one of the countries that use blockchain technologies and one of those, where these technologies are used at the state level. The most commonly used blockchain in the field of high-tech enterprises (Fintech), at the household level, the blockchain is closely linked to the circulation of cryptocurrencies. Today there are about a hundred companies and projects in the blockchain industry of Ukraine. Among the main projects using this technology are: electronic land auctions, the activity of the State Land Cadaster, the State Register of Real Property Rights and the System of electronic trade in seized property. The main advantages and disadvantages, existing problems, prospects for development, and domestic projects using blockchain technology in Ukraine are identified. Analyzing users’ search queries on the Internet allowed us to conclude the growing interest in these last hours. SWOT analysis was conducted to determine further prospects for the use of the blockchain in Ukraine: the main strengths and weaknesses of the use of the blockchain in various fields are identified, and its potential opportunities and threats are described.

Mikola YAKOVCHUK, Vitalii MIKHALEVSKYI, Neliya MEDVEDCHUK, Tetiana SKRYPNYK · 5 authors

The article considers and investigates the system of decision making in the production processes of an agricultural enterprise. In dynamic conditions of decision-making and operational adjustments, a methodology of operational analysis of the current situation is needed to obtain the necessary results. Decentralized blockchain-based systems are the most promising for doing business. Usage areas of decentralized systems are production and logistics. Globalized production and distribution of agricultural tasks have brought a new milestone in the development and optimization of existing systems. The growing number of issues related to the optimization of internal processes in enterprises, has caused an urgent need for an effective solution to process tracking, which serves as an important tool for quality management and provides adequate protection of the process in the agricultural production chain. Blockchain is one of the main technologies that can provide innovative solutions for tracking agricultural products and food supply chains. Modern agricultural supply chains are a complex ecosystem that includes a number of stakeholders and therefore complicates the verification of important criteria: country of origin, stages of crop development, compliance with quality standards, yield monitoring. Ethereum Smart Contracts can effectively monitor and seamlessly integrate business operations and workflows for a stable supply of agricultural products. The agricultural sector has great potential for modernization and optimization of production, which in general can be a breakthrough for the economy as a whole. It is thanks to him that the country receives a significant flow of currency. After the abolition of tariffs restricting the supply of products to Europe, new markets were opened for production. Demand for agricultural products is high and by modernizing the management system, we will be able to get even better results. Also, the involvement of information technology provides good conditions for productive and confident development of small and medium-sized agricultural enterprises and farms. For example, blockchain technology will provide access to new markets and reduce the bureaucratic burden on the company, simplify communication with suppliers and customers.

Volodymyr Mishchenko, Svitlana Naumenkova

The purpose of the paper is to study the specifics of the organization of issue and circulation of digital money by central banks, to summarize existing global expe-rience and assess the potential impact of digital currencies on the conditions of monetary policy, the functioning of the mechanism of money transmission and ensuring financial stability through the implementation of sound decisions of cen-tral banks in the digitalization of finance. Methodology. The study is based on an analysis of the scientific literature and points of view of foreign and domestic ex-perts in the field of digital technology. It is also based on the experience of the European Central Bank, the People's Bank of China, the Bank of England, the Bank of Israel and the National Bank of Ukraine on the implementation of pilot projects for the issue and use of digital currencies, quantitative and qualitative assessment of the impact of new forms of money on monetary policy, the func-tioning of the transmission mechanism, state finance, efficiency of payment sys-tems and payment transactions. In processing the material of the article used a set of general scientific and special methods of research, such as dialectical, his-torical-logical, system-functional and analytical approaches, generalization, scien-tific abstraction and others. The results of the study showed that the proposed digital currencies of central banks should be considered as a new high-tech dema-terialized form of national fiat money. Having summarized the impact of the issue and circulation of digital money by central banks on the main parameters of eco-nomic policy, it can be argued that their use will lead to significant changes in the structure and functions of commercial and central banks, as well as existing na-tional and transnational payment systems. The issuance and circulation of digital currency can significantly affect the nature of central banks' monetary policy, the conditions under which the monetary transmission mechanism functions, and the implementation of fiscal policy. Practical implications. The study revealed the main advantages and disadvantages of using centralized and decentralized models of issue and circulation of digital money by central banks, identified the direc-tions of institutional changes in the development of the banking system and the implementation of monetary policy in a digitalized economy, which will provide a high level of control over all monetary transactions of market players. Val-ue/originality. Using the experience of pilot projects on the issue and circulation of digital currencies of central banks will help to improve the effectiveness of monetary policy, to activate the mechanism of monetary transmission, to ensure the stable functioning of the financial system and reduce the level of shadow economy and corruption.

Viktoriia PYLYPENKO, Mykhailo HALAI, Ihor KOSIAK

The paper examines the essence of cryptocurrency as a method of payment has been investigated and identifies its key features (exchange for goods or services; exchange for classic currency; payment for goods and services; minimum level of possibility of abduction; payments, fast and direct transactions; investment asset; business development in cryptocurrency). Different approaches to determining the legal nature of cryptocurrency are analyzed (cryptocurrency as a method of payment; cryptocurrency as a foreign currency; cryptocurrency as a financial asset; cryptocurrency as a financial pyramid). The conclusions of the EU court, the courts of the national system on the use of cryptocurrency as a means of payment are analyzed. The legal nature of cryptocurrency is determined through the prism of world practices of its use. The possibility of using cryptocurrencies in terms of their ability to perform the basic functions of money is analyzed. The paper examines two attempts of legislators to regulate the issues of taxation, legal nature and legal regulation of cryptocurrency in 2019 and 2020. Attention is also paid to the relevant institutions where you can pay with cryptocurrencies, namely: “Spendabit”, “CoinATMRadar”, exchange office in online networks – WebMoney. According to the National Bank of Ukraine, the danger of cryptocurrency transactions is indicated. Examples of the main risks associated with the purchase, sale, exchange and conversion of cryptocurrencies are given (possibility of loss of funds due to theft, possibility of fraud, lack of infrastructure, significant price fluctuations of cryptocurrencies, lack of guarantees for return of invested funds in cryptocurrencies). In conclusion, attention is drawn to the need for legislative regulation of the essence of cryptocurrency for further effective evolution.

Маргасова, В., Ружицький, I., Ткаленко, Н., Шестаковська, Т. · 5 authors

Abstract. The article describes the approaches to defining the essence of understanding «public finance» and «public finance management» in the context of administrative and financial decentralization. A study on the current state of economic development of Ukraine is carried and the public financial management system is analyzed. The dynamics of the ratio of revenues and expenditures of the State and local budgets is shown and the national and subnational levels in the financing of public expenditures are described. The sequence of achieving a new level of welfare of the population is presented and the ways of state influence on local economic development are outlined. The content of the state’s activity on financial resources management and public importance of finances is given. Particular attention is paid to the financial capacity of UTC and the existing positive developments within the decentralization reform in Ukraine. The need to improve the management of public finances was emphasized, as it was evidenced by the size of the budget deficit. The division of budget expenditures by functional classification between the national and subnational levels is presented and the decline of financial independence of subnational budgets is witnessed. An assessment of the level of confidence in financial asset management services of territorial communities based on the calculation of the relevant index is made, and the relationship between the selected indicators (the monetary expenditures of the population; deposits of individuals in investment funds; population savings; volume of capital investments; volume of investments in Ukraine; assets of investment funds) and the level of public confidence in the management of UTC financial assets is researched.  Keywords: financial management, public finance, financial capacity of territorial communities, financial assets. JEL Classification H70, H89, R59, Q01 Formulas: 1; fig.: 5; tabl.: 3; bibl.: 20.

Kamil Jurczyk

In recent years, one of the most frequently discussed aspects in the world of economics has been the use of blockchain technology in economic life and the growing popularity of cryptocurrencies. Both blockchain and cryptocurrencies have incredible potential, and it is only a matter of time before they become part of daily life. The world's largest companies regularly invest in projects related to cryptocurrencies and blockchain. On the other hand, some countries have decided to ban all private cryptocurrencies and instead develop their own concepts of a digital currency issued by a central bank. This paper aims to discuss the issues related to the potential and threats posed by the development of cryptocurrencies and blockchain technology. The analysis involves technical, social and legal aspects linked to the development of virtual money. All the considerations in the paper are based on a critical analysis of the literature on the subject and the descriptive method.