Fast Finality
Classic optimistic rollups make users wait out a long challenge window — often seven days — before a withdrawal can exit. StonkBrokerChain does not: withdrawals settle in minutes.
How
- 1The validator posts a state assertion to the Rollup contract on Robinhood Chain.
- 2Because the validator is also the designated fast confirmer, it may confirm the assertion immediately instead of waiting out the challenge window.
- 3As soon as the assertion is finalized, the withdrawal’s Merkle root is registered in the Outbox and the exit can be claimed on Robinhood Chain.
What bounds the time
End to end, a withdrawal is claimable within a few minutes of initiation — bounded by how quickly the next batch and assertion are posted, not by a dispute timer.
What's the catch?
Fast confirmation is a trust trade-off, and we state it plainly: a fast-confirmed assertion skips the public challenge period, so finality rests on the honesty of the fast-confirmer key rather than on fraud proofs playing out.
In practice this changes less than it sounds like, because StonkBrokerChain — like almost every young appchain — already has a single whitelisted validator and a centralized sequencer. The challenge window on such a chain was protecting against a permissionless challenger who does not exist yet. See Security & Trust Model for the full picture.