A Proxy-Layer Approach to Secure Smart Contract Deployment on Private EVM-Based PoA Blockchains

Within the enterprise sector, there is a growing trend of adopting private and consortium blockchains to leverage the benefits of blockchain technology. Networks based on Proof-of-Authority (PoA) and compatible with the Ethereum Virtual Machine (EVM) are particularly advantageous in this scenario, providing both efficiency and straightforward setup. While private blockchains inherently enhance security by their permissioned nature, which restricts node participation to authorised entities only, it’s crucial to recognise the ongoing necessity for additional safeguards. These safeguards are essential to guarantee that only verified and trustworthy smart contracts are deployed. A key concern in this realm is addressing particular attack vectors, such as front-running attacks. This paper presents an innovative proxy-layer solution designed to integrate effortlessly with any EVM-compatible blockchain, thereby strengthening both governance and security aspects.