Definition ∞ Cross-Rollup MEV, or Maximal Extractable Value, refers to the profit opportunities that arise from ordering, censoring, or inserting transactions across different layer-2 rollup networks. This concept extends the traditional MEV found on single blockchains to an environment with multiple interconnected rollups. It involves strategic transaction sequencing that spans these distinct scaling solutions. Such activities can influence transaction costs and network efficiency.
Context ∞ The potential for cross-rollup MEV extraction is a growing area of concern and research within the Ethereum scaling landscape. As more applications and users migrate to various rollups, the interactions between these networks create new opportunities for MEV. Debates surround mechanisms to mitigate negative externalities, such as front-running, and to redistribute extracted value more equitably. Solutions often involve shared sequencing layers or specialized protocols designed to coordinate transaction ordering across multiple rollups.
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