Sei Labs published Giga Whitepaper V2, moving the design from sub-400ms to sub-250ms finality while keeping the 200,000+ TPS and 5 gigagas/sec target. The new piece is Sedna, a private transaction layer that fragments trades across proposer lanes so no proposer sees the full transaction before ordering is finalized, with the upgrade planned without regenesis or downtime.

TLDR by @Benthic

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