Online Auction System Using Blockchain Technology
Authors:-Dipali Phad, Shruti Jadhav, Harshada Rane, Saish Shinde, Prof. P V Nagare, Professor P. V. Nagare
Abstract-:Online auction platforms have revolutionized the way digital assets and products are bought and sold. However, traditional auction systems are typically hosted on centralized servers, exposing them to several vulnerabilities such as data tampering, single points of failure, and manipulation of bid values. This research paper proposes an Android-based decentralized online auction system that integrates a custombuilt blockchain ledger using the SHA-256 hashing algorithm to store all bid records securely. Unlike existing blockchain auction platforms that use smart contracts our system excludes smart contracts entirely and instead uses a simulated recharge wallet for handling virtual bid payments. Firebase is utilized as the backend database to handle authentication and real-time data sync. The system architecture promotes trustless interactions while remaining lightweight and mobile-accessible. This paper discusses the detailed architecture, blockchain logic, wallet mechanism, and the system’s realtime capability, showing its potential as a practical and secure auction platform without needing smart contracts.
