Design and Implementation of a Transferable and Delegatable Cryptocurrency Wallet System Based on Ethereum Blockchain

Abstract

With the rapid expansion of the global cryptocurrency market since the 2018 Bitcoin investment boom, the number of cryptocurrency users has increased significantly. Despite the emergence of various cryptocurrency wallets, issues such as users' inability to properly manage their assets and the growing number of security incidents and crimes continue to undermine trust in digital asset storage. In this context, there is an urgent need for a system that can ensure secure asset protection and address users' anxiety regarding cryptocurrency management. However, the concept of cryptocurrency security remains undefined, relevant laws and regulations are not yet institutionalized, and academic research in this area is still limited. To address these challenges, this paper proposes an Ethereumbased cryptocurrency wallet system that not only enhances the functional and security aspects of existing wallets but also enables cryptocurrency delegation and ownership transfer. We designed and implemented a DApp that allows users to securely store, delegate, and transfer cryptocurrencies through an escrow account implemented via smart contracts on the Ethereum blockchain. By presenting a practical implementation of a transferable and delegatable wallet, this study contributes to improving user trust and asset safety, while laying the foundation for legal and technological innovation in the digital asset ecosystem.