MEV and Sandwich Attacks

MEV and Sandwich Attacks represent the exploitation of the order flow in decentralized exchanges by sophisticated actors. MEV, or Maximal Extractable Value, refers to the profit that can be extracted from reordering, including, or excluding transactions within a block.

A sandwich attack is a specific type of MEV where an attacker observes a large pending trade, places their own buy order before it to drive up the price, and then sells immediately after the victim's trade, profiting from the resulting price slippage. This practice extracts value from regular users and is a major challenge for protocol security and fairness.

Developers are implementing various mitigations, such as batch auctions or private transaction relays, to protect users from these predatory practices. It highlights the adversarial nature of the blockchain environment and the importance of transaction ordering.