I always see a mark on etherscan called "Private Transaction - this tx bypassed the mempool." What is happening there and how does it work?
What is happening there and how does it work?
One of two things is happening:
- The miner is mining their own transactions;
- 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.