# Sandwich Attack Content type: Glossary Term Summary: An MEV strategy that places one transaction before and another after a victim's trade to exploit price impact. Related resources: - Block Builder (Glossary Term): https://theblockchainlibrary.com/glossary/block-builder - Mempool (Glossary Term): https://theblockchainlibrary.com/glossary/mempool - Searcher (Glossary Term): https://theblockchainlibrary.com/glossary/searcher - Transaction Ordering (Glossary Term): https://theblockchainlibrary.com/glossary/transaction-ordering - Back-Running (Glossary Term): https://theblockchainlibrary.com/glossary/back-running - Front-Running (Glossary Term): https://theblockchainlibrary.com/glossary/front-running - How VSC Maintains Security With a Flat-Rate Gas Model — Even During Peak Demand (Article): https://theblockchainlibrary.com/article/how-vsc-maintains-security-with-a-flat-rate-gas-model-even-during-peak-demand - Vector Smart Chain and Real-World Assets (RWAs): Unlocking the Next Wave of Blockchain Adoption (Article): https://theblockchainlibrary.com/article/vector-smart-chain-and-real-world-assets-rwas-unlocking-the-next-wave-of-blockchain-adoption
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Sandwich Attack

An MEV strategy that places one transaction before and another after a victim's trade to exploit price impact.

Explain Like I'm 12

An MEV strategy that places one transaction before and another after a victim's trade to exploit price impact.

Why It Matters

MEV concepts explain how transaction ordering can create economic opportunities and risks.

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Related Terms

Block Builder

A specialized participant that constructs candidate blocks or transaction bundles for proposers.

Mempool

The mempool, or memory pool, is a temporary staging area where unconfirmed transactions reside before they are selected by a validator or miner to be included in a blockchain block. It acts as a gateway for transactions entering the network. Each node maintains its own local version of the mempool, where transactions are validated against network rules before propagation. As block space is limited, competition for inclusion often leads to users paying higher transaction fees to prioritize their transactions within the mempool, a process known as fee-based prioritization.

Searcher

An actor or automated system that identifies and submits transaction bundles designed to capture MEV opportunities.

Transaction Ordering

The rules or mechanism determining the sequence in which pending transactions are included and executed.

Back-Running

An MEV strategy where a transaction is deliberately placed immediately after a target transaction to capture an opportunity.

Front-Running

The practice of placing a transaction before a known pending transaction to profit from or alter its expected execution.