OP Labs
@OPLabsPBC
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Scaling ethereum's technology & values with @Optimism.
Joined April 2022
A New Horizon: Scaling EVM @DromosLabs is joined by leadership from the @ethereumfndn, @OPLabsPBC, @circle, and @base as they discuss delivering on the promise of onchain finance through neutral, open infrastructure. The future is coming Nov 12th. James Smith, Ethereum
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As with all L1 hard forks, OP Labs ensures that all OP Stack chains remain compatible and we’re proud to rapidly bring new L1 functionality to our chains. The OP Stack release for Sepolia Fusaka readiness went live earlier this week. All partners must complete the update before
docs.optimism.io
Learn how to prepare for the Fusaka upgrade
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Fusaka activation on Sepolia: 🗓️ 2025-10-14 07:36 UTC ⏱️ Activation epoch 272640 (timestamp 1760427360) Mainnet activation is expected in early December, and we’ll have plenty to share as we get closer, including comms and release details!
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Why does this matter? The OP Stack is able to inherit Ethereum’s security by storing transaction data in L1 blobs, and scaling blob capacity is critical to enabling OP Stack chains to continue scaling. Fusaka includes two features critical to scaling data availability and blobs
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Fusaka hardfork is coming - and with it, more blobs! Optimism is at the forefront of delivering fast, low-cost blockspace to help bring the world onchain. From playing a key role in the initial development and rollout of EIP-4844 (blobs) to rapidly accelerating Fusaka timelines
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🚨big life update. 🚨 I’ve joined the @Optimism team as the Lead Event Strategist for @OPLabsPBC, and I am moving to NYC!🥳 I am extremely excited to lead great events, build community & scale the future of Ethereum. ✨Eternally Optimistic about what's ahead! ✨
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Lastly, thanks to the @base team for contributing numerous batcher improvements, including the improved throttling controllers included in this release, as well as extensive design and implementation effort for the upcoming protocol-level improvements planned for Jovian.
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We'd like to extend our thanks to Stefanos Chaliasos and team for their well-researched reporting, and for actively collaborating with us alongside @conduitxyz, @base, @world_chain_, and @unichain during the process. Additional thanks to the Conduit team for finding the initial
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The latest op-batcher release reduces the impact by introducing better and smoother throttling controllers, and mitigates other worst-case spam scenarios. The planned Jovian upgrade will introduce a per-block data-availability footprint limit and a minimum base fee to provide
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The report identified a way in which a user could take advantage of Sequencer transaction inclusion policies and throttling mechanisms. An attacker could spend considerable resources in order to raise transaction inclusion fees higher than expected levels.
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We received an initial report of the issue from @emilianobonassi in October 2024, and worked with @conduitxyz and @base on an initial fix. In May, a research team led by Stefanos Chaliasos reported this and some related vectors, for which we assigned a Medium severity rating and
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OP Labs has released an update to op-batcher to mitigate a spam vector on the sequencer which could make it more expensive to transact on OP Stack chains. Sequencers are strongly recommended to update promptly.
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Research is key to building a strong OP Stack and a robust rollup ecosystem. We recently implemented key fixes and paid out a $20K bounty reward for the following report.
New Paper w/ @YourBuddyConner, @spilehchiha, @nico_mnbl, @convoluted_code, Akis Kattis. Mispricing issues in major rollups enable practical DoS and finality attacks. All major rollups have made adjustments in production and we were awarded multiple bug bounties. 1/🧵
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New Index drop! 🔥 What does the next era of Ethereum look like? Host @afkehaya joins @sammcingvale, Head of Product @OPLabsPBC, to dive into the Superchain vision and building the future of blockchain. Watch Now!
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Are you building on Superchain and trying to understand your dApp's Account Abstraction usage? 🔮 Thanks to collective work done by @0xBundleBear, @OSObserver, @OPLabsPBC, @erc4337 and @patterns_build you can now easily access all 4337-related data for free in BigQuery 🚀
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🚨 Big upgrade for builders on OP Sepolia 🚨 Flashblocks are now live via QuickNode, reducing effective block times to just 250ms ⚡ Test faster. Build better. Ship sooner. With QuickNode.
OP Sepolia just got a LOT faster - we've integrated Flashblocks, built by the team at Flashbots, reducing effective block times from 2 seconds to 250 milliseconds.
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Builders can integrate Flashblocks on testnet today as we gear up for mainnet.
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OP Sepolia just got a LOT faster - we've integrated Flashblocks, built by the team at Flashbots, reducing effective block times from 2 seconds to 250 milliseconds.
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