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Janusz MEMBER SINCE 2024

Janusz

@januszgrze

LX

2editions
1talks
0projects

2 editions attended.

On stage.

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talk

You are all wrong about rollups and it is driving me insane

Rollups are a flavor of blockchain that rely on a parent blockchain for security and data availability. They do this so they do not have to bootstrap their own validator set. They do not need a sequencer, and they do not need a bridge. They can operate purely through bitcoin L1 transactions, or they can maintain an offchain mempool for better throughput. To provide different types of execution layers for bitcoin the asset, they can have a bridge (which can be a federation, a single custodian, or some version of BitVM). Bitcoiners were introduced to rollups through progress made in BitVM; specifically from teams in the BitVM alliance. But, these teams were building rollups before BitVM was discovered and announced. And, rollups have existed on bitcoin for over a decade! In this Lightning talk, Janusz will explain why everyone is wrong about rollups, why the rollup teams are tricking you into believing that the bridge defines the rollup, and why this semantics debate is just a rehashing of arguments from the past. Janusz will provide three examples of rollups, one with a bridge, one without, and one without a bridge & a sequencer. He will share how all three of these systems ultimately work the same from the lens of the rollup full nodes; the real users.

Vegas 2026