Mempool
A mempool is the set of unconfirmed transactions broadcast to a blockchain network that are waiting to be included in a block.
Category
On-Chain Execution
These terms describe how transactions are propagated, ordered, and sometimes exploited in public transaction pipelines.
How to recognize this theme
Words you see when trades compete for ordering on a blockchain.
In a daily board, this category groups terms by their shared role. Look for four cards that describe the same mechanism, risk area, or workflow rather than four words that merely sound similar.
Educational context
These entries are vocabulary notes for learning. They are not project endorsements, token recommendations, exchange rankings, or trading signals.
MEV
MEV (maximal extractable value) is value that can be gained by controlling the ordering, inclusion, or exclusion of transactions in a block.
Sandwich Attack
A sandwich attack is a pattern where an attacker places transactions before and after a target swap to influence execution and capture value at the target's expense.
Private Orderflow
Private orderflow is transaction intent routed through private relays or auction systems so it is not visible to the public mempool before execution.