Optimism

Optimism's testnet OP Sepolia has entered **phase 2** of its stake-based transaction ordering experiment, introducing a new multiplier system that combines three factors into a single ordering score: - **Stake size** - **Stake duration** - **Priority gas** The formula: `effectivePriorityGas = priorityGas × m_total(S, t)` **Key features:** - Capped at 3x maximum advantage - Resistant to stake-rent attacks through time penalties on flash borrowing - Non-staking transactions remain unaffected This represents the first in a series of planned sequencer experiments for OP Mainnet, designed to enable programmable block-building tailored to enterprise performance and policy requirements.

**ether.fi completes major migration to OP Mainnet** The largest non-custodial crypto card by spend volume has moved its entire operation to OP Mainnet, bringing: - 70,000+ active cards - 300,000+ accounts - $220M+ in total value locked (TVL) **Why OP Mainnet?** The infrastructure offers compelling advantages: - $0.00001 median transaction fees - Sub-250ms finality via Flashblocks - 99.99% uptime year to date **What's next** The migration unlocks future features including increased cashback rewards, native stablecoin support, and deeper on-chain liquidity. Users can continue using Stake, Liquid and Cash services without disruption.

FalconX's institutional research desk released comprehensive analysis of the OP Stack's growth and market position. **Key Metrics:** - 50+ chains now built on OP Stack - 6 billion transactions processed in 2025 - 43% of all Ethereum Layer 2 activity The OP Stack, originally developed by Optimism (formerly Plasma Group), has evolved from a single Layer 2 solution into the foundation for the Superchain - a network of interconnected chains. Teams building on OP Stack, including Base, share revenue with the Optimism Collective and gain access to benefits like Retro Funding and growth incentives. The open-source approach has positioned OP Stack as the leading infrastructure for Ethereum scaling solutions.

A new report from Four Pillars analyzes **Privacy Boost**, the first privacy solution built on the OP Stack. The report explores what constitutes institutional-grade blockchain privacy and how Privacy Boost addresses these requirements. **Key highlights:** - Privacy Boost represents the first privacy-focused implementation on Optimism's OP Stack infrastructure - The solution aims to meet institutional standards for blockchain privacy - Four Pillars provides detailed analysis of the privacy mechanisms and their applications The report comes as institutional adoption of blockchain technology continues to grow, with privacy remaining a critical concern for enterprise users. Privacy Boost's integration with the OP Stack suggests growing attention to privacy features within the Ethereum scaling ecosystem. Read the full Four Pillars report for technical details on institutional-grade privacy implementation.

**Alchemix v3 is now operational on OP Mainnet**, marking a significant upgrade to the protocol. **Key features include:** - Mix-Yield Tokens for diversified yield strategies - Fixed-Duration Transmuter for predictable debt repayment - 90% loan-to-value (LTV) vaults, allowing users to borrow more against their collateral The deployment on Optimism's layer-2 network aims to provide users with faster transactions and lower fees while maintaining Ethereum security. Transparency boards remain available at [alchemix.octav.fi](http://alchemix.octav.fi) for protocol metrics and [alchemix-association.octav.fi](http://alchemix-association.octav.fi) for association data.

The OP Stack is enabling a new era of blockchain customization, according to insights from @karl_dot_tech. **Key Points:** - Customization allows blockchains to be tailored for specific use cases and requirements - The OP Stack provides the infrastructure to make this customization technically feasible - This represents the next significant wave of innovation in crypto development The ability to customize blockchains opens new possibilities for developers to create specialized solutions rather than one-size-fits-all networks.

The **Scaling Summit** brought together founders and builders to address critical industry challenges: - **User retention** in an attention-scarce market - **Product differentiation** in a crowded builder landscape - **Compliance frameworks** that balance regulation with innovation momentum - **RWA and stablecoin adoption** beyond builder narratives toward mainstream use The event focused on practical solutions rather than theoretical discussions, with participants examining how to move from concept to global implementation.

The **Superchain ecosystem** now handles **14.1% of all cryptocurrency transactions**, representing nearly **2x growth** in just five months. **Key metrics:** - $17.8B secured across 30+ chains - 24M+ daily transactions - $6.2B in stablecoins onchain Major chains include Base, Celo, OP Mainnet, Unichain, World Chain, and others building on Ethereum's scaling infrastructure. This growth demonstrates the **increasing adoption** of Layer 2 solutions as users seek faster, cheaper transactions while maintaining Ethereum's security. [View complete Superchain statistics](https://stats.optimism.io/)

**Fusaka is now live on Ethereum mainnet**, delivering the infrastructure needed for Layer 2 scaling. The upgrade introduces **PeerDAS**, which allows validators to sample small data chunks instead of downloading full blobs. This reduces storage requirements from 40-100 GB to just sampled shards. **Key improvements:** - More blob capacity for rollups through Blob Parameter-Only forks - Gas limit increase from 45M to 60M - Lower data availability costs for L2s - Reduced fees for end users The upgrade emerged from **cross-ecosystem collaboration** between Ethereum core developers, client teams, Base, Soneium, OP Labs, and Sunnyside. Teams worked together to solve L2 scaling bottlenecks that were causing rising fees. **For builders:** OP Stack chains now have more throughput headroom, lower L1 data costs, and a predictable scaling roadmap. The implementation included extensive testing through devnets that pushed different client combinations under real rollup workloads. Read the full technical details: [Optimism blog post](https://www.optimism.io/blog/fusaka-is-live-scaling-optimism-and-the-superchain)

**Scaling isn't just about bigger numbers** - it's about delivering real value to users, according to insights from @karl_dot_tech at the New Horizon event. Key challenges identified: - Compute bottlenecks - Parallelism implementation - Cross-chain liquidity issues **Real progress requires solving these together**, not chasing TPS metrics alone. *"Through interoperability, we grow the pie. You can build something a competitor builds on, and both of you win."* The focus shifts from raw performance claims to **practical solutions** that enhance user experience and enable true blockchain collaboration.