Technical Concepts

Mempool

Memory Pool

Waiting area for unconfirmed blockchain transactions

Definition

The mempool is a waiting area for unconfirmed transactions on a blockchain network. Transactions sit in the mempool until miners or validators include them in a block.

Example

When you submit a transaction, it first goes to the mempool where MEV bots can see it before it's included in a block.

1

What to check

Treat it as infrastructure: understand what it automates, what trust assumptions remain, and how failures propagate. The main checks are: Front-running; Transaction stuck; MEV extraction.

Risks to Consider

  • Front-running
  • Transaction stuck
  • MEV extraction

Common Questions

Why is my transaction stuck in the mempool?

Usually due to low gas fees. Miners prioritize higher-fee transactions, so yours waits until network congestion decreases or you increase the fee.

What does Mempool mean in DeFi?

Mempool means Waiting area for unconfirmed blockchain transactions. The useful question is not only the definition, but how the mechanism changes risk, return, liquidity, or governance for the user.

How is Mempool used in practice?

A practical example: When you submit a transaction, it first goes to the mempool where MEV bots can see it before it's included in a block.

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