Introducing SIP-5: a post-quantum upgrade path for Sei.
SIP-5 is ready today, so that if a quantum threat emerges, every account has a route to quantum-safe security.
Meanwhile, Sei Labs is also building higher-performance cryptography that will replace it.
The best trading experiences have always run on an order book.
Every major market in finance is built on one.
@MonacoTrading brings that Wall Street-level execution to Sei.
Live on testnet now:
https://t.co/RmONmVMWL6
Today, I'm excited to share V2 of the Giga Whitepaper.
Big changes since v1:
- Even faster sub-250ms finality
- Pre-execution privacy
- Makes MEV on @SeiNetwork negligible
Giga will be more than high-performance. It will fundamentally change onchain trading.
V2 of the Sei Giga Whitepaper is live.
Sei Labs can now confirm that Giga will have substantially better performance and an improved featureset over what was initially described.
Giga will have:
- Sub-250ms finality
- Pre-execution privacy
- Protocol-level MEV resistance.
Here's what's new and why it matters:
Finality: sub-250ms, down from 400ms.
Autobahn's pipelined two-phase BFT is designed to reach consensus in 1.5 round trips versus Tendermint's 3.
In the design, ordering finality is decoupled from state attestation: every trade will settle at consensus speed, while execution happens asynchronously so heavy computation never delays block production.
State commitments will use lattice hash divergence digests over write logs, eliminating Merkle tree computation from the hot path.
The biggest addition in this new version is Sedna.
On single-leader chains, the block producer controls ordering. On multi-proposer chains, any proposer that sees your full transaction can duplicate it and race you in the merge order. The whitepaper identifies three MCP-specific MEV channels.
Sedna is designed to address all of them. Senders would encode transactions into rateless fragments distributed across proposer lanes, and no proposer would see the full payload until the finalization threshold is crossed.
Pre-execution privacy without encrypted mempools, threshold decryption or adding latency to the critical path.
Under Giga, transaction ordering will be fully deterministic.
The tip priority merge rule orders lanes by descending maximum tip, preserves intra-lane position, and deduplicates by hash. The output is a pure function of the committed cut.
Every correct executor will derive the same ordered transaction sequence from the same finalized data.
Storage and execution were also substantially upgraded in v2.
Storage: flat LSM-based key-value store will replace Merkle Patricia Tries. Tiered hot/warm/cold architecture. Divergence commitments over write logs introduced.
Execution: Block-STM parallel execution with optimistic concurrency control. Pipelined parsing, address recovery, and signature verification.
The paper also clearly defines:
- Production Sedna with PIVOT-K incentive layer
- Autobahn consensus upgrades
Forthcoming research:
- Full transaction fee mechanism
- Full-scale PQC alternatives beyond ML-DSA
- Giga tokenomics
The difference between 400ms and 250ms is almost imperceptible to the human eye.
To a trader, it's 37.5% less time for the market to move between your order and your fill.
Giga Whitepaper V2: sub-250ms finality.
Introducing the Giga Whitepaper V2.
The first Giga Whitepaper laid out the fastest blockchain yet.
V2 brings privacy, predictability, & performance.
🔴 Sub-250ms finality
🔴 Pre-execution privacy
🔴 Protocol-level MEV resistance
🔴 200K+ TPS
The blockchain built for trading: https://t.co/6u92qLxK0r
~50% of US equity volume trades privately.
Nearly $300B a day moving through dark pools or off-exchange.
Less than 1% of onchain trading volume is private.
Onchain trading isn't built for how institutions trade. Yet.
Capital efficiency is still a key challenge for exchanges today. Institutions have entire businesses devoted to optimizing for capital efficiency and balance sheets. Without the ability to properly portfolio margin, today's onchain CLOBs are children's toys compared to CEXs.
On a per-transaction basis, marginal fee differences are negligible.
For high-volume trading, those differences compound, and fee efficiency becomes a core requirement.
Speed, scale, near-zero fees, and privacy on the way.
Sei is the blockchain for trading.
Add privacy to this list.
These specs make Sei fast and final. Privacy makes it predictable.
Public transactions get front-run, reordered, and picked off before they settle.
With Sedna, transactions stay private until finality.
This is infrastructure for the modern economy.
After a week alongside the brightest in tech and finance.
One thing is clear: Sei keeps coming up.
Here's what you missed at @Techweek_ and more ↓
🔴 Sei and @Mastercard gave a first look at the joint whitepaper to the crowd at NY Tech Week, ahead of the public release: https://t.co/SGZxgGaI3q
🔴 @MonacoTrading announced a research partnership with @fhenix focused on confidential onchain trading infrastructure: https://t.co/9ZMfBY2EcT
🔴 @MessariCrypto dropped their Q1 state of blockchains, highlighting +350% QoQ RWA growth on Sei: https://t.co/4NlWBdQqaG
🔴 @TokenRelations broke down the recently released Sei Giga roadmap: https://t.co/XzXmC5Eutb
🔴 @sumvin and Sei rang in Tech Week with friends from all corners of AI and finance: https://t.co/FrHK5QlQFp
🔴 @envio_indexer published a step-by-step guide to spin up an indexer and power your app on Sei with real-time data in minutes: https://t.co/W7mcQ3iGa5
Markets Move Faster on Sei. ($/acc)
Late Friday @Sei_Labs rolled out the v6.5.0 mainnet upgrade for @SeiNetwork.
p50 block times are already down to ~400ms. Huge improvement.
Bigger story is the next chart though.
Coming next week. @jayendra_jog sits down with the @Mastercard team and @Sumvin's @Sjones.
A conversation on production readiness and the trajectory of onchain finance—right ahead of the joint Sei + Mastercard whitepaper.
📍 NY Tech Week
🗓️ June 2
See you Tuesday.
Sei Network celebrates third birthday!
@SeiNetwork is now some three years old, the scalability-focused network having now processed more than 2.6 billion transactions since launch, per @chainspect_app.
At time of writing, the $SEI token holds a market cap of more than $400 million, still well below highs of nearly $2.8 billion seen in late 2024.
A refined look for Sei. The same vision three years later.
The Blockchain for Trading continues to mature alongside the markets it serves.
Here's how that looked this week ↓
🔴 Sei rolled out a new brand identity built for institutional finance and real-world trading: https://t.co/cA4jo465qw
🔴 @jayendra_jog laid out the vision behind the new look: https://t.co/IfVmGgvCRm
🔴 Perps went live on @MonacoTrading in private alpha: https://t.co/5m9yFjkT0x
🔴 @trademontecarlo joined the @MonacoTrading ecosystem, bringing volatility markets onchain: https://t.co/65imYrN0MM
🔴 @TakaraLend wrapped Season 1 of Karats: https://t.co/pmOTFR3HL5
🔴 Sei turned three: https://t.co/hE5FSXbo7b
🔴 @Sei_Labs flagged a required unstake of iSEI ahead of the CosmWasm deprecation: https://t.co/Fy6YZ5Zx0H
Markets Move Faster on Sei. ($/acc)
There's a new brand for @SeiNetwork.
At launch in 2022, Sei was intended as the "blockchain for trading."
At the time, that meant crypto-native stuff: tokens, orderbooks, and exchange infrastructure.
What I didn't fully see was how far "trading" would stretch.
Oil futures now trade through the weekend. Pre-IPO markets exist for founders and early employees. Elections are priced in real time. Compute, attention, and risk have liquid markets. Credit is tokenizing.
Everything is becoming liquid, global, and always on.
More than ever, the world needs better infrastructure for trading. Infrastructure that only blockchains can deliver.
Today, Sei is one of the fastest blockchains. One day soon, after the Giga Upgrade, Sei will be the most performant chain, fundamentally unlocking new use cases and better market structure.