A shared sequencing network began public testing with three participating rollups, allowing transactions that must either succeed on all chains or none.
The design assigns block-building rights through an auction, with the winner obliged to include bundles from each connected chain within a fixed window.
Developers building cross-chain applications say atomicity removes the need for the bridging workarounds that have caused most user-facing failures.
Critics point out that a shared sequencer is also a shared failure domain, and that escape hatches allowing users to force transactions directly to the base layer remain essential.
The teams involved say mainnet deployment depends on completing an audit of the forced-inclusion path, which is scheduled to begin next month.
