What is Mempool?

The waiting area where pending transactions sit before a validator includes them in a block — visible to everyone, which enables front-running.

How it works

Because pending transactions are public before confirmation, bots watch the mempool to exploit them. Understanding that your trade is visible pre-confirmation is why slippage tolerance and private routes matter.

Example

In practiceYour swap sits in the mempool for a few seconds, visible to bots, before a validator picks it up and confirms it.

Can I hide my transaction?

Partially — private transaction routes and MEV protection keep it out of the public mempool. Standard broadcasts are visible until confirmed.

Go deeper: DeFi From Scratch

The complete, step-by-step guide — every command, config, and the reasoning behind it.

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