Arman Process Journal (APJ)

Abstract Nowadays, blockchains are best known for their vital role in digital currency systems in maintaining a secure and decentralized record of transactions, but their use cases are not limited to digital currencies. Blockchains can be used to make data immutable in any industry. A decentralized cryptocurrency exchange is a new type of cryptocurrency market trading platform that eliminates all intermediaries, enables digital market trading, and uses blockchain technology and smart contracts, and is very secure. Due to the necessity and importance of the increasing development of blockchain-based decentralized digital exchanges, this article first introduces the achievements and benefits of these exchanges and then, based on a case study, a basic application system is developed to create a decentralized exchange for buying and selling tokens using smart contracts. Using blockchain technology, this system enables the secure and transparent exchange of VoteCoin tokens. Its user interface, using React and interacting with MetaMask, allows users to easily interact with the system and participate in the buying and selling of tokens. This approach provides a foundation for a practical and tangible understanding of decentralized digital exchanges and their functioning, and can serve as a guide for developers and users in this field.

Abstract Background and Objectives: The cryptocurrencies, including bitcoins, are the fruits of the development of information technology in the international and even domestic financial system in the last decade. Have brought with them. In the present study, From the point of view of individual jurisprudence, the cryptocurrencies are a kind of property, their transactions are not usury and arrogance, and therefore, if the transaction basis of the cryptocurrencies is correct from the religious point of view, its exchange is permissible, but if the transaction basis of the cryptocurrencies is not legitimate, Their transaction is void and forbidden.
Methods: In this study which is descriptive-analytical; we reviewed most of the governmental jurisprudence documents about cryptocurrency trading.
Findings: The result of the present study is that based on arguments such as the no-harm rule, the rule of respect and the rule of maintaining order, and the rule of action and the rule of justice, which all prevent the implementation of incorrect monetary policies and increase the problematic amount of money in the Islamic economic system.
Conclusion: It is advisable to prevent transactions in the field of currency cryptocurrency until the legal order is established by the government to control the cryptocurrency in the country's economy.

Abstract Blockchain is a fundamental technology that has changed the recent digital world. In fact, blockchain technology is a digital ledger that records transactions in a secure and transparent manner and provides a decentralized method for verifying and maintaining records. In the field of digital economy, blockchain and digital currencies are intrinsically related to each other. Digital currency is a special form of digital money created on the basis of cryptography. Digital currency has a wide range of uses from online transactions, remittances, decentralized applications to commerce. Most digital currencies use blockchain technology to benefit from basic features such as decentralization, transparency, and immutability. In fact, blockchain is a technology that enables the effective use of digital currencies such as Bitcoin, Ethereum and other digital currencies. The purpose of this article is a science-based study based on blockchain developments and examining the use of blockchain in the digital currency industry, regulations, opportunities and upcoming challenges.