Comprehensive Analysis of Mitigation Strategies for Denial-of-Service Attacks on Smart Contracts

Abstract

The Denial-of-service (DoS) attacks pose a significant risk in smart contracts. They often arise from unexpected failures in external calls. This papers thoroughly examines DoS vulnerabilities in smart contracts and looks at effective ways to reduce these risks. The authors explore contract scenarios that are vulnerable to refund-failure DoS attacks. In these cases, bad actors can disrupt contract operations. The experiments show that some methods completely defend against these attacks, but they might some with a cost and hamper overall user experience. Other methods find a middle ground, improving security and usability by improving DoS and re-entrancy risks without interfering with single interaction flows. The research provides a solid evaluation for DoS mitigation strategies and offers practical advice for developing secure smart contracts.