bt ($/acc)

core eng @sei_labs

[Sei Labs @Sei_Labs]

As of block #224 201 091, Sei v6.6 is officially live.

V6.6 includes nearly 400 pull requests, including the first mainnet components of Sei Giga.

This is the largest upgrade to Sei since EVM support was added in May 2024.

Here are the most important takeaways:

Execution and storage

- The Ares Upgrade begins: the v2 executor is being retired. The Giga hybrid executor is now the default execution path on mainnet, with roughly 10x the throughput. Every upgraded node runs it. v2 stays on as a per-transaction fallback, and a full v2 node runs on every network comparing results block by block.
- The Eidos Upgrade begins: state separation. Two years of chain state, unpicked one block at a time, with EVM history moving into its own database instead of sharing one with Cosmos state. This is the most error-prone part of shipping Giga, engineered to be a non-event for operators.

Security

- Over 30 issues fixed across DoS and resource exhaustion, P2P attack surface, and supply-chain hardening. Closer to 50 counting race conditions and upstream security backports.

Node operators

- Network synchrony is significantly improved. Consensus timeout parameters were retuned, with devnet showing up to 15% fewer vote misses and block proposal latency cut in half. More predictable block times, less bandwidth spent on catchup.
- Two configuration footguns are gone. Both have caused validator outages in the past. Simpler values, less to get wrong.
- Pruning no longer drags nodes behind the chain. It now compacts the deleted key range as soon as each prune finishes, holding prune runs at a steady ~5 minutes and head lag under 60 blocks.

Builders

- Receipts are backed by Giga+OCC by default: invisible txs no longer get receipts, state-transition errors that bump the nonce now do, and EIP-1559 effective gas price lands on the receipt.
- JSON-RPC error handling is now spec-correct; query surfaces are bounded, with proper pagination.
- Historical debug_trace sits behind a config flag, with a 10,000 block default lookback.

[Sei @SeiNetwork]

Monaco Research has appointed Goldman Sachs alum Simran Singh as CEO.

Singh, previously Head of DeFi Trading at @GSR_io, will align @monacotrading’s development of Wall Street-grade trading infrastructure with the demands of professional traders.

"Monaco's infrastructure is going to power the next generation of institutional-grade onchain trading," said @0xTurbanUrban "We're building the connective tissue between DeFi and traditional markets."

See you in Monaco ⭕️

[Sei @SeiNetwork]

$SEI is now available to trade on @RobinhoodApp.

[Sei Labs @Sei_Labs]

While preparing for the Sei Giga upgrade, Sei Labs benchmarked node performance using different state store backends.

When comparing RocksDB and PebbleDB with MVCC for indexing-heavy historical queries, RocksDB was able to reduce node operator latency by 10–40×

[Sei @SeiNetwork]

JUST IN: a16z report confirms Sei flipped Sui, Polygon and Aptos in active addresses for September 2025.

Building on a strong Q3, growth on Sei has accelerated — DEX volume exceeding $10B LTM, 3 ETF filings, and tokenized funds from BlackRock, Apollo, and more now live on Sei.

[Psu ($/acc) @0xpsupsu]

A proposal for v6.2.0 for 10/15/2025 (tomorrow) at 16:00 UTC, atlantic-2 (testnet) has been sent out. At a high level, this version includes:

- Performance & Stability Improvements: Major optimizations to getLogs, transaction indexing, and mempool memory footprint; reduced mutex contention and improved ante failure handling across RPC and state logic.
- RPC & EVM Consistency Fixes: Fixed discrepancies in sender/address resolution, cumulative gas usage, and gas price calculations; ensured consistent gas limits and correct inclusion/exclusion of synthetic logs in eth_ endpoints.
- Upgrades & Refactors: Integrated Pectra upgrade, bumped dependencies (Geth, btcec, x/crypto, Golang), refactored precompiles and base services, and added rate limiting, mock balance testing, and automation scripts.
- Reliability & Safety Enhancements: Hardened precompiles, added better snapshot handling and synchronous receipt flushing, improved consensus metrics, proposer validation, and introduced websocket OOM protection.

Full changelog: https://t.co/JBi36yqO4I

[bt ($/acc) @besated_]

Repeat after me: Sei szn just started.

[Jay @jayendra_jog]

Ecosystem stronger than ever. Giga roadmap almost complete. Incubations cooking.

Repeat after me: Sei szn just started.

[Jay @jayendra_jog]

Should native stablecoins pass yield back to ecosystems?

Starting with USDH and USDM, yield sharing stablecoins could dominate.

I asked @Sei_Labs Research to model this out.

Our conclusion: yield sharing stablecoins are inevitable IF they can clear the regulatory hurdles.

[Jay @jayendra_jog]

People don’t realise that the EVM will be much bigger than Ethereum.

Traditional finance, retail and payments are coming onchain.

Ethereum will settle huge value. So will Sei.

But all of it will be on the EVM.

[21shares US @21shares_us]

We're excited to announce that we've filed with the SEC for a SEI ETF in the U.S. - a key milestone in our vision to expand exchange-traded access to @Seinetwork.

[Jay @jayendra_jog]

Yesterday Sei Labs ran new speed tests on the Sei Giga devnet.

We were able to sustain over 211,492 transactions per second.

Sei Giga will be the highest throughput EVM chain, ever.

[bt ($/acc) @besated_]

I'm super proud of the team behind this one. This is the first of many incubations

[Sei @SeiNetwork]

The Wall Street-Grade Trading Layer

Introducing @monacotrading, incubated by @Sei_Labs

Monaco is the only CLOB built for Wall Street, with <1ms execution and deep shared liquidity, supercharging onchain trading for institutions & retail.

Markets Move Faster on Sei. ( ⭕ /acc)

[bt ($/acc) @besated_]

Two years of learning, building, and shipping and this still isn’t our final form

Can’t wait to see what’s next

[Sei Labs @Sei_Labs]

Today, two years ago, Sei network went mainnet.

Our overarching vision: Building the decentralized Wall Street.

Growth so far has been incredible. And Sei Giga isn't even here yet.

[bt ($/acc) @besated_]

@jayendra_jog happy birthday sei 🎂

[bt ($/acc) @besated_]

@0xpsupsu speedrunning onboarding 🏃

[bt ($/acc) @besated_]

Everything moves faster on Sei.

[Sei Labs @Sei_Labs]

Coinbase has added Sei support for the x402 protocol.

Providers of ANY SERVICE can now request fees in stablecoins, settled on Sei.

MCP servers. Agentic workflows. Even API providers. Everything moves faster on Sei.

[Jay @jayendra_jog]

The energy at the Science of Blockchain Conference (SBC) last week was remarkable.

Excitement about @seinetwork is at an all time high, a testament to the rapid ecosystem growth we’ve seen recently

Left feeling bullish on Sei and profoundly excited for the future. 🧵

[Sei @SeiNetwork]

Etherscan is coming to Sei.

@etherscan, the premier EVM explorer, will unlock advanced analytics, streamlined readability, and performance insights on the fastest EVM chain.

EVM Moves Faster on Sei. ($/acc)

[Sei @SeiNetwork]

Tokenized US Treasury Bills are coming to Sei! 🇺🇸

@OndoFinance is bringing its flagship product, USDY, with over $680M in TVL, to the fastest L1 blockchain.

Institutional-grade assets meet institutional-grade infrastructure.

Markets Move Faster on Sei. ($/acc)

[Sei @SeiNetwork]

Native @USDC and CCTP V2 by @circle are coming to @SeiNetwork, bringing the world’s largest regulated stablecoin to the fastest L1 blockchain.

Markets Move Faster on Sei.