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  1. Home
  2. /Glossary
  3. /Mempool
Back to Glossary
blockchain

Mempool

The waiting room for unconfirmed transactions before they're included in a block.

Definition

The waiting room for unconfirmed transactions before they're included in a block. Miners and validators pick transactions from the mempool, usually prioritizing higher fees. During congestion, the mempool swells and fees spike.

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Related Terms

Transaction

A transfer of value or data recorded on a blockchain.

Gas

The fee paid to process transactions on Ethereum and similar blockchains.

Block

A bundle of transactions that gets permanently added to the blockchain.

ABI

Application Binary Interface.

Account Abstraction

A way to make crypto wallets behave more like normal apps by turning every account into a smart contract.

ERC-4337

The Ethereum standard for account abstraction without changing the core protocol.

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