Espresso Systems×Taifoon.
HotShot sequencer × Taifoon V5 — shared sequencing, provable. Live integration since day one — the banner below regenerates from /api/intel/espresso every fifteen seconds so both sides can verify the wire is current.
HotShot finality, anchored against the SuperRoot.
Taifoon indexes Espresso's mainnet sequencer block-by-block and threads HotShot consensus through V5 as a first-class finality type — alongside Ethereum PoS, Arbitrum BOLD, BSC fast finality, and seven others. Espresso-sequenced rollups inherit the same six-layer proof envelope, with the HotShotLightClient on Ethereum L1 as the BN254 Plonk anchor.
The shareable card.
↗ open the raw graphic — right-click → save for sharing
One post each side.
Pre-confirmation is the floor; a six-layer proof is the ceiling.
Espresso ships pre-confirmations in seconds because HotShot consensus finalizes the block before Ethereum L1 even sees it. That solves the hard part — getting validators to agree on transaction order. But cross-chain consumers still have to ask: can I prove this block landed without re-running a full HotShot node?
Taifoon answers that. We index every Espresso block the moment it lands, derive a V5 cryptographic proof that binds the block hash to the HotShotLightClient state on Ethereum, and serve the proof through the same envelope solvers already use for Arbitrum BOLD, BSC fast finality, and seven other consensus families. Same wire, one more row in the finality registry.
The integration is structural — not a press release waiting for code. The links below are the ones we'd hand to any third party who wants to verify the claim end-to-end.