Mempool
The pool of pending transactions waiting to be included in a block.
The pool of pending transactions waiting to be included in a block.
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Sep 2026 · Wynik świeżości: 50%
What is Mempool?
The pool of pending transactions waiting to be included in a block.
- Category
- concept
- Type
- Authority Node
- Sources
- 1
When a user broadcasts a transaction, nodes validate it and add it to their local mempool. Miners/validators select transactions from the mempool (typically prioritizing higher fees) to include in the next block. Mempools vary by node — tra
The mempool is where transaction inclusion is decided — fee competition happens there, and it is the front line of MEV. Understanding mempool dynamics (fee market, ordering) matters for users wanting timely inclusion and for protocols expos
Knowledge Graph
37 relationsRelated
1. What Is a Mempool
The mempool is the pool of pending, unconfirmed transactions that nodes hold before they are included in a block. It is the waiting room of a blockchain.
2. How It Works
When a user broadcasts a transaction, nodes validate it and add it to their local mempool. Miners/validators select transactions from the mempool (typically prioritizing higher fees) to include in the next block. Mempools vary by node — transactions visible there are not yet final. Public mempools enable MEV extraction, sandwich attacks, and front-running.
3. Why It Matters
The mempool is where transaction inclusion is decided — fee competition happens there, and it is the front line of MEV. Understanding mempool dynamics (fee market, ordering) matters for users wanting timely inclusion and for protocols exposed to front-running. Private mempools and order-flow auctions aim to protect users.
4. Key Facts
- Mempool size spikes during congestion
- Priority fees (EIP-1559 tips) influence selection
- MEV bots monitor mempools for profitable opportunities
- Private/encrypted mempools (e.g., Flashbots, Shutter) mitigate MEV
5. Related Concepts
- gas-price
- transaction-fee
- mev
- full-node
Frequently Asked Questions
What is Mempool?
The pool of pending transactions waiting to be included in a block.
How does Mempool work?
The mempool is the pool of pending, unconfirmed transactions that nodes hold before they are included in a block. It is the waiting room of a blockchain. When a user broadcasts a transaction, nodes validate it and add it to their local mempool. Miners/validators select transactions from the mempool
Why does Mempool matter in Web3?
- transaction-fee - mev - full-node