Optimism Blog

At Optimism, our success is measured by our partners' success. Whether they’re just beginning to explore onchain infrastructure or ready to launch their own network....

We're excited to announce that the Optimism documentation has undergone a complete transformation!...

Onchain applications live and die by their user experience. If transactions feel slow or unpredictable, the promise of Ethereum scalability falls flat. ...

Technical debt has become a catchall term for engineering challenges, often cited as a blocker without clear articulation of its actual impact....

Optimism and Flashbots are partnering to bring fast, configurable, verifiable sequencing to the Superchain, powered by the team that built Ethereum’s sequencing pipeline....

Today marks a thrilling milestone for the OP Stack ecosystem: the first public release of kona-node, our modular, high-performance rollup node built entirely in Rust....

We all love a good story, especially in crypto, where rapid change and open data make it easy to find patterns and draw conclusions....

Security roles in crypto need steady, methodical work. Figuring out the safety of a complex protocol is genuinely challenging, and effective threat modelling is a...

Optimism is extending its $2 million bug bounty program to cover proposed protocol upgrades before they ever go into production, as OP Stack core developers prepare to...

Relayer.sol brings first class multichain end-to-end testing to your Forge testing setup. By inheriting from the abstract Relayer test helper, your tests can spin up fork...

Just over three years ago, the Optimism Collective embarked on a large-scale experiment in decentralized governance. From the beginning, we’ve been committed to taking...

We recently ran PeerDAS through its paces on a modified peerdas-devnet-7 testnet (big thanks to EthPandaOps for leading the spec work!). This devnet was run by Sunnyside...

Like any business, the Superchain needs clear success metrics to evaluate performance and guide strategic decisions....

This post kicks off a multi-part series on PeerDAS. Over the coming weeks we’ll publish performance deep dives for every major consensus layer /execution layer (el/cl)...

Optimism core developers at OP Labs successfully activated the Isthmus hardfork today, bringing key features from Ethereum’s Pectra upgrade to the OP Stack...

The OP Stack is becoming the standard. Standards win because they compound. More OP Stack chains mean more experiments, faster iteration, and unstoppable momentum....

With many chains building as one, a new network structure is emerging to solve fragmentation in Ethereum. This network is modular, interoperable, and composable...

Stablecoins are vital for onchain finance, and the Superchain is quickly becoming an important ecosystem for stablecoin users and asset issuers...

There is never a dull year in the Ethereum ecosystem. As we begin 2025, we want to take the opportunity to look back at the progress that has been made across Optimism...

A milestone event took place during this year's Devcon – the Ethereum Interop Forum (EIF). This gathering brought together key players from across the Ethereum ecosystem...

This blog post shares how the Wonderland team builds tools to make data interoperable across the Superchain and Ethereum ecosystem....

At Optimism, our mission is to build an internet that benefits all, owned by all. We are working to scale Ethereum and empower developers and users worldwide...

As we step into 2025, we continue to summon Ether's Phoenix through the evolution of Retroactive Public Goods Funding. This post outlines our plan to improve the...

Today we’re excited to welcome Kraken to the Superchain with Ink: a blockchain powered by the OP Stack....

Optimism started as a project with a single L2 chain and the goal to scale Ethereum — both its technology and its values. The blockchain industry has evolved...

Uniswap Labs, Uniswap Foundation, and Optimism are excited to announce the launch of Unichain, an L2 purpose-built for DeFi, exclusively on the OP Stack – now live...

The Superchain is pioneering a new, shared approach to scaling Ethereum’s tech and values in a sustainable way that benefits all builders....

Today we are excited to welcome Soneium to the Superchain. Soneium, by Sony Block Solutions Labs, is building an Ethereum Layer 2 using the OP Stack...

This blog post details our approach to unifying the Superchain by bringing native Interoperability to the OP Stack and enhancing UX across the Ethereum ecosystem...

Optimism began with a single chain – an L2 called OP Mainnet – a single team, and a single dream: to scale Ethereum...

This post outlines the key features and benefits of fault proofs, details its rollout plan, and offers a glimpse of what's next on the path of technical decentralization....

Governance-approved, permissionless fault proofs are live on OP Mainnet, and with them the OP Stack arrives at Stage 1. This is a monumental milestone for the Superchain...

This post details the latest baseline decentralization upgrades - including permissionless output proposals, bridge improvements, and permissioned roles updates...

The Optimism Collective holds a shared, long-standing commitment to scaling Ethereum. From our technology stack to our values structure, it’s core to everything we do...

For the past month, Lattice has prepared for the public launch of Redstone with its Race to Mainnet, inviting several game developers to build and playtest on the network...

With the Sherlock audit contest completed, fault proofs are one step closer to OP Mainnet! This post covers initial contest results and next steps....

Last year, Worldcoin Foundation committed to the Superchain vision for a more secure, decentralized, and equitable internet....

This guest post from Kiwi News discusses how to tap into Ethereum liquidity by making NFT minting available both on L1 and L2....

Part two of the Fault Proof Deep-Dive Series with Coinbase concludes the overview of Cannon, the OP Stack’s first Fault Proof Virtual Machine (FPVM)...

At its core, Retroactive Public Goods Funding (Retro Funding) embodies a vision of collaboration and collective success. In order to scale the Superchain...

A one-stop shop for aggregated tools and promotions, the Optimism Collective’s new Superchain Developer Console makes it easier than ever for developers to build and grow...

Feature-complete fault proofs are live on OP Sepolia! This milestone testnet release lays the foundation for a "multi-proof nirvana" and Stage 2 Superchain....

This blog post reflects on the journey from EIP-4844's inception to implementation, and shares insights into what this update means for the future of Ethereum....

Amidst a whirlwind of creativity, We ❤️The Art has reached its conclusion, after seeing 7,000+ submissions seize this OPportunity to share their art...

This blog post explores the theory behind how bonds are incorporated into the OP Stack's Fault Dispute Game to incentivize both participation and honest behavior....

This blog post shares how Test in Prod built the Delta protocol upgrade, which brought the feature Span Batches, and significant savings, to OP Chain mainnets....

Retroactive Public Goods Funding (Retro Funding) is an economic flywheel that rewards positive impact to the Optimism Collective...

Today, Optimism is excited to announce Optimism Drop #4 (claim here), which gives 10,343,757.81 OP to 22,998 unique addresses...

Part one of the Fault Proof Deep-Dive Series with Coinbase explores the FPVM smart contract MIPS.sol and how it works within the OP Stack's Fault Proof System....

On February 9, the Collective marked the launch of its first Security Council with the execution of an onchain transaction establishing a 2/2 multisig that is authorized...

OP Labs is introducing a proposed protocol upgrade to bolster the ability to respond to security incidents in a coordinated manner across all OP Chains....

Introducing the Ecosystem Repository, a place where utilities & applications get built to interact with protocols in the Optimism ecosystem, and their infrastructure....

501 builders, writers, creators, educators, and contributors from across the Optimism ecosystem have been allocated a portion of 30M OP...

This blog post shares more about how we are thinking about decentralization at OP Labs as we support the ecosystem engineers building out a fault proof system...

In a rapidly evolving digital landscape, Optimism is pioneering a path towards a collaborative Superchain ecosystem—one where all chains are on a level playing field...

This year at Devconnect in Istanbul, Turkey, the Optimism Collective hosted their first full day of talks and networking, aptly titled Onchain Summit: Superchain Edition...

Ethereum's Goerli testnet, and OP Goerli along with it, will be fully decommissioned in January 2024. Migrate to OP Sepolia for any testing and development needs!...

This blog post shares details about the first code changes that will make the Superchain real. The first establishes as protocol version system, and the second focuses...

Developers need access to testnet tokens so that they can properly deploy, test, and iterate on their contracts in testnet...

Thus far blockchain has been the site for exciting innovation in the realms of finance, governance, identity, and culture...

On Nov. 14 at 17:00 UTC, Superchain testnets will upgrade to Canyon! This blog post outlines all the changes coming to the Optimism ecosystem in the wake of this protocol...

In Season 4 of Optimism Governance, the community rallied around Collective Intents, where teams work on tightly scoped, specific initiatives known as Missions...

This post gives an overview of the OP Stack's first fault proof system, its components, and how they will work together to enhance decentralization in the Optimism...

A deep dive into dispute games & the role they will play in fault detection in the OP Stack's first fault proof system....

This blog post explores the principle of social decentralization, how L2 architecture allows Layer 2s to extend this principle to include proof diversity...

Earlier this year, the Optimism Collective announced the third round of Retroactive Public Goods Funding (RetroPGF)...

This month marked a momentous first for Ethereum: a publicly listed US company launched its very own OP Chain powered by Optimism...

This blog post explores the modular design of the OP Stack's Fault Proof System, featuring a deep dive into the system’s pre-image oracle....

The Superchain Faucet will enable builders in the Optimism ecosystem to leverage onchain reputation data to to claim up to 20x the typical amount of testnet ETH....

The OP Stack was built to be the most forkable, modular scaling infrastructure out there. When we introduced it, we explained that it was our bet on the ingenuity...

An update on technical decentralization and the OP Stack's first Fault Proof System....

The Optimism Collective is governed by a two-house system. The Token House is made up of OP holders and their delegates, and the Citizens’ House...

On June 6, 2023, OP Mainnet upgraded to Bedrock, and the entire migration process was designed to be verifiable and reproducible....

The OP Stack's code is EVM-equivalent, secure, performant, and MIT-licensed. The Optimism Ecosystem Contributions Dashboard can help developers get started....

The Optimism Collective is excited to announce the third round of RetroPGF. This fall, 30 million OP will be distributed to builders, creators...

Test in Prod authors this guest post where they share their journey of discovering the OP Stack and building op-erigon....

OP Labs is excited to start highlighting OP Stack Mods, modifications or improvements to the OP Stack created by members of the Optimism and Ethereum communities...

Retroactive Public Goods Funding (RetroPGF) is one of the leading economic experiments to help decentralize and grow crypto ecosystems...

With Bedrock, we built a system that can fit many types of proof schemes, providing a more flexible, secure, and future proof OP Stack for builders in the Optimism...

The Optimism Collective is building community governance through experimentation. This iteration happens through time-bound governance experiments known as “Seasons.”...

The Optimism Collective is building a better economic engine that fuels positive-sum games, and decentralized identity is central to that goal...

In February, OP Labs engineers and core developers from the Optimism Collective gathered in person for the Keys in Mordor summit. The goal for this summit?...

The Superchain Token List will simplify the process of bridging tokens between Ethereum and OP Chains built on the OP stack, including OP Mainnet and Base....

Test in Prod leveraged the modular and open source OP Stack to develop an alternate execution client, op-erigon, now available to test on OP Goerli....

This blog post delves into the intricacies of account abstraction, ERC-4337, and the benefits of a novel RPC endpoint that is being built to make...

Retroactive Public Goods Funding is the engine that drives the growth of the Optimism ecosystem....

The Bedrock upgrade will introduce a new two-step withdrawal process to the Optimism Mainnet bridge that will improve its security & make exploits much more difficult....

A recap of the super time Optimists from OP Labs and the Optimism Foundation had talking about scaling Ethereum, the Superchain, and RetroPGF at ETHDenver....

This post explores how the Bedrock upgrade will bring 47% reduction in protocol costs and security fees to Optimism Mainnet....

Optimism was built to empower humanity through decentralized blockchain technology that enables unprecedented coordination of human intelligence across the globe...

An update on OP Labs’ goals for advancing Optimism’s technical decentralization....

In May 2022, Optimism conducted Airdrop #1, distributing over 200m OP tokens to 250,000 early adopters and engaged users....

The successful OP Goerli Testnet upgrade is behind us, a robust audit competition is putting the Bedrock architecture under a microscope, and voting on the upgrade...

With the recent successful migration of the OP Goerli to Bedrock, we are approaching a crucial phase of the Bedrock release: the OP Mainnet upgrade....

After a year of intense research and development, OP Labs has built the cheapest, fastest, most minimal codebase for an Ethereum-equivalent rollup, ever...

Wow. 2022 has been quite the decade. As we prepare to leave it behind us and greet the new year, we thought we'd take a look back on another year of Optimism....

Gitcoin’s new grants protocol is actively under development and, as of this writing, currently in an alpha testing phase...

Alpha leak: today marks the start of the beta for the Optimist NFT, a customizable profile picture project meant to represent user identity across the Optimism ecosystem...

Optimism is many things: a rapidly diversifying economy, a stack of open source modules for scalable blockchains, and a Collective of companies, contributors...

EIP-4844 (protodanksharding) is on the rise. With its development, memes, and community support, it's anticipated as the next big upgrade to Ethereum...

In alignment with our goal to decentralize the Optimism ecosystem, we plan to open source more and more pieces of the Collective...

A recap of the time your Optimistic amigos spent at ETHBogotá and Devcon 6, complete with Hackathon winners, workshop highlights, and links to our many presentations....

Building an entirely on-chain crafting-based voxel game using the OP Stack....

The Optimism Collective is an attempt to birth a new form of organization, built on the belief that that humans > capital and impact = profit...

Explore the Optimism app ecosystem with Quests...

Earlier this year, we declared a Summer of Optimism heralded by the launch of the Optimism Collective, the OP token, and the distribution of grants to projects aligned...

A recap of all things Optimism at EthCC Paris, with links to presentations on Bedrock, EIP-4844, Cannon, and Optimism's technical roadmap....

Guiding new users to their first transaction on Optimism....

Optimism does a lot of stuff on-chain. Managing and monitoring the many on-chain interactions required to keep a system like this running can become a bit of a headache...

The Kovan testnet has been deprecated by the Ethereum community, with only two validators remaining...

A little over a month ago, we announced the launch of the Optimism Collective: our large-scale experiment in digital democratic governance...

Bedrock is the cheapest, fastest, and most advanced rollup architecture. Ever....

Last month, we unveiled our vision for Optimism’s governance system. For years leading up to this milestone, people asked us: “when token?” ...

Excitement has been brewing since last week’s announcement of the Optimism Collective. It’s going to be an OP Summer....

As crypto enters its next wave of adoption, the calls for scalability are deafening. This demand is often answered by centralized layer-1 competitors...

It’s hard to believe, but OP Mainnet launched over a year ago. Since then, we’ve...

Humanity’s defining characteristic is its ability to organize and cooperate. We have devised a number of tools to do this — from language, religion, and legal structures...

In the beginning, mainnet.optimism.io was just a domain alias. All the actual infrastructure was handled by QuickNode. This let us focus on developing the core protocol...

Today, we’re extremely excited to formally introduce Cannon to the world. Cannon is OP Mainnet’s next-gen fault proof. Its initial implementation by geohot...

Optimistic rollups are rapidly gaining maturity. As we move beyond the “zero to one” phase, the name of the game is optimization–and the most tangible optimization...

It’s hard to overstate how much fun we had at ETHDenver last week. We’re still coming down from our post-conference high — the inevitable fallout from a week...

Last month was OP Mainnet’s 1-year mainnetiversary. We’re incredibly proud of this milestone — but the path is far from over...

Solidity devs: meet Smock v2. The Solidity mocking library. A collaboration between Optimism and the fantastic team over at DeFi Wonderland....

Dearest Etherscan, How to describe what you mean to us? Let us count the ways. You are...

This is the story of our experience looking into a bug that caused our Optimistic Ethereum testnet deployment to stop accepting new L1 ⇒ L2 deposits for a period...