Arbitrum

Self sequence

In the event of a sequencer failure, users can force transactions to be included in the project's chain by sending them to L1. There can be up to a 1d delay on this operation.

Fraud proofs (INT)

Fraud proofs allow actors watching the chain to prove that the state is incorrect. Interactive proofs (INT) require multiple transactions over time to resolve.

Onchain

All of the data needed for proof construction is published on Ethereum L1.

10d

Non-emergency upgrades are initiated on L2 and go through a 8d delay on L2 and a 3d delay on L1. Since there is a 1d delay to force a tx (forcing the inclusion in the following state update), users have 10d to exit.

⚠ The Security Council can upgrade with no delay.

Self propose

Anyone can be a Proposer and propose new roots to the L1 bridge.