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MEV attacks have been an omnipresent evil in the blockchain world, animplicit tax that uninformed users pay for using the service. The problemarises from the miners' ability to reorder and insert arbitrary transactions inthe blocks they mine. This paper proposes a 2-phased transaction protocol toeliminate MEV attacks. The user requests an interaction token from the on-chaincounter-party. This token serves as a blind preemption for the counter-partyand prevents the reordering of transactions at lower levels in the blockchainframework. We prove the correctness of the CoMMA protocol and demonstrate itsefficacy against MEV attacks.

CoMMA Protocol: Towards Complete Mitigation of Maximal Extractable Value (MEV) Attacks