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MEV
Also: maximal extractable value
Profit that block producers or bots can earn by reordering, including or excluding transactions.
Because transactions wait publicly in the mempoolMempool The waiting area for transactions that have been broadcast but not yet included in a block., bots can spot a large trade and trade just before and after it (a “sandwich”), profiting at the trader’s expense. Private transaction relays and tighter slippageSlippage The difference between the price you expected and the price your trade actually got. settings reduce exposure.