Base reveals same sequencer bug caused June 25 and 26 outages
Two block-production halts inside 48 hours, traced to one shared bug, but the chain's integrity held and no funds were lost. The remediation list is the part builders will read.
Optimism is a Layer 2 scaling project built on Ethereum, best known for OP Mainnet and the broader Superchain network of interconnected blockchains. The project provides the open-source OP Stack, a modular framework that has become one of the most widely adopted foundations for building Ethereum rollups, powering chains operated by major industry participants such as Coinbase, Uniswap, Kraken, and others. Functioning as a rollup-based scaling solution, Optimism processes transactions off Ethereum's mainnet while inheriting its security, enabling significantly faster and lower-cost activity for decentralized applications. The ecosystem follows a standardized revenue-sharing arrangement, under which each chain in the network contributes a share of its revenue back to the Optimism Collective, creating aligned economic incentives across the network. OP is the native governance token of the Optimism Collective. Holders use OP to vote on protocol upgrades, treasury allocations, and funding for public goods within the ecosystem. The project is classified within the smart contract platform and Layer 2 categories, and represents one of the most prominent scaling efforts within the broader Ethereum landscape.
Two block-production halts inside 48 hours, traced to one shared bug, but the chain's integrity held and no funds were lost. The remediation list is the part builders will read.
The arrangement lets Optimism run Ink's production stack while the Ink Foundation redirects engineering capacity to ecosystem growth and new financial products.
Curve Finance has deployed Llamalend v2 on Optimism as its first destination, backed by a 250,000 OP token grant from…
Base and Arbitrum now hold more than 80% of L2 DeFi TVL, while smaller chains like Linea, Starknet and Mantle watch bridge deposits slide — operators say the winners will be chains tied to a real…
Six large-cap tokens have already walked through their full investor unlocks — Optimism is the next notable name to cross the line, with its final investor tranche due May 31, 2026.
Optimism's final core contributor and investor vesting tranche is the headline at $4.18M, but GUA and H together account for more than two-thirds of the week's unlocked supply.
Ethereum L2 fees have dropped below one cent and Optimism and Arbitrum hit the Stage 1 security milestone, finally making on-chain payments economically viable for the first time.
Five of the ten biggest 30-day TVL decliners are Ethereum Layer-2s, a pattern that reads less like capital rotation and more like an answer to Vitalik's critique of copy-paste L2s.
It's the first deployment under Optimism's new OP Enterprise Self-Managed model — Dunamu keeps the sequencer keys while the Optimism Foundation stays on as engineering and backup infrastructure.
The 30-day split is a story of single-app migration versus single-app outflow — a reminder that headline TVL is a chain-level number but a per-app function.
Upbit's 13M-user exchange will run its own sequencer — a model the Optimism Foundation is now packaging as a new "Self-Managed" enterprise tier aimed at regulated operators who won't rent their chain.
The Optmism Foundation hands the primary sequencer key to Dunamu under a new self-managed tier that lets chains keep the OP Stack engineering support without ceding control of core decisions.
Optimism is more than just a single blockchain – it's a growing network of chains called the Superchain, all built on the open-source OP Stack.
Optimism (OP) is categorised as: Smart Contract Platform, Optimism Ecosystem, Layer 2 (L2).
The official Optimism site is https://www.optimism.io.
Most recent Optimism coverage: "Base reveals same sequencer bug caused June 25 and 26 outages" — read at /en-US/a/base-reveals-same-sequencer-bug-caused-june-25-and-26.