MEV attacks have been an omnipresent evil in the blockchain world, an implicit tax that uninformed users pay for using the service. The problem arises from the miners' ability to reorder and insert arbitrary transactions in the blocks they mine. This paper proposes a 2-phased transaction protocol to eliminate MEV attacks. The user requests an interaction token from the on-chain counter-party. This token serves as a blind preemption for the counter-party and prevents the reordering of transactions at lower levels in the blockchain framework. We prove the correctness of the CoMMA protocol and demonstrate its efficacy against MEV attacks.
翻译:MEV攻击是链锁世界无处不在的邪恶,不知情的用户为使用这一服务而支付隐性税,问题在于矿工能否重新订购和在他们所开采的区块内插入任意交易;本文件提议了分两个阶段的交易协议,以消除MEV攻击;用户要求链锁反方发出互动信号;该信号是对反方的盲目先发制人,防止在链锁框架下层重新订购交易;我们证明了COMMA协议的正确性,并展示了其对MEV攻击的效力。