I always see a mark on etherscan called "Private Transaction - this tx bypassed the mempool." What is happening there and how does it work?

1 Answer 1


What is happening there and how does it work?

One of two things is happening:

  1. The miner is mining their own transactions;
  2. A user/bot is sending their transaction to a private/permissioned mempool belonging to a specific miner.

Private mempools are a paid service. They're also not necessarily a pool, but an endpoint that is provided by the miner to clients who have paid for it.

You'll have to hunt around for such services online.

A good start to understanding how they work is described in Escaping the Dark Forest.


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