Mempool
Infrastructure
Pool of pending transactions awaiting inclusion in a block.
The mempool is a queue of pending transactions. Nodes use it to decide what to include next. If a transaction is slow, try raising the fee or replacing the pending nonce.
Frequently asked questions
Why is my transaction stuck in the mempool?
The fee may be too low, or a prior nonce is pending. You can replace or cancel if your wallet supports it.Are all mempools the same?
No. Different nodes and relays can have slightly different views due to propagation and filters.How can I avoid public mempools?
Use private relays or submit through services that protect order flow when available.