The act of altering the order or content of transactions within a blockchain block by a miner or validator. This action can be undertaken to gain an unfair advantage, such as front-running trades or censoring specific transactions. Successful block manipulation compromises the integrity and immutability typically associated with blockchain technology. It poses a significant threat to the fairness and security of decentralized systems.
Context
Discussions around block manipulation frequently appear in news concerning Miner Extractable Value (MEV) and validator behavior in proof-of-stake networks. Protocols are implementing mechanisms like proposer-builder separation to reduce the opportunities for such activities. The ongoing debate centers on balancing network efficiency with measures designed to prevent unfair block construction practices.
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