Using Threat Modelling as a Strategic Development Tool

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 structured way to spot weak points early so you can fix them. It's a straightforward process that taps into what engineers and business

Featured

Optimism Extends $2 Million Bug Bounty Program to Protocol Upgrades Ahead of Superchain Interop

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 roll out native interoperability to the Superchain. The proposed Upgrade 16 to the OP Stack is now live as the first upgrade proposal

End-to-End Multichain Testing with Relayer.sol

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 forks of multiple networks, emit real L2ToL2CrossDomainMessenger events, and relay them inside the same forge test process — no external relayer or scripting glue required.

PeerDAS-devnet-7 Updates

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 Labs, a core development team in the Optimism Collective, to benchmark how well different combinations of execution and consensus layer clients handle blob

Data

Metrics To Be Optimistic About in 2025

Why Metrics Matter Like any business, the Superchain needs clear success metrics to evaluate performance and guide strategic decisions. Defining success in crypto is challenging. There’s constant debate over the “best” metric, often because people are optimizing for different goals, values, or timeframes. This disconnect creates confusion and makes

PeerDAS and a 48 blob target in 2025

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) client pair, surfacing how each stack performs in preparation for the upcoming Fusaka upgrade. The Ethereum Foundation recently outlined its priorities for

Guest Post Featured

Setting out for a cross-chain future: Moving data across blockchains

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

Protocol Development Featured

Solving Interoperability for the Superchain and beyond

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 by adopting standardized cross-ecosystem interfaces.

Protocol Development Featured

The Fault Proof System is available for the OP Stack

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.

Protocol Development Featured

Unpacking progress in baseline decentralization

This post details the latest baseline decentralization upgrades - including permissionless output proposals, bridge improvements, and permissioned roles updates - helping advance the OP Stack towards a more decentralized future.

Initial findings from the fault proof program Sherlock audit

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

Minting NFTs from Ethereum or OP Mainnet

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

Guest Post

Fault Proof Deep-Dive Part 2: Cannon

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) used as part of the Dispute Game.

Build faster, build together: Introducing the Superchain Developer Console

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 their businesses across the Superchain. The Superchain Dev Console makes it as easy, and accessible to launch your app on the Superchain. Whether

Open-source and feature-complete fault proofs bring permissionless validation to the OP Sepolia testnet

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.

Ecosystem

From EIP to Ethereum mainnet: the collective triumph of 4844

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.

Protocol Development

Incentivizing honesty and participation in the OP Stack’s Fault Proof System

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.

Protocol Development

How the Delta Upgrade reduced OP Chain fixed costs by over 90%

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.

Protocol Development

Fault Proof Deep-Dive Part 1: MIPS.sol

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.

Protocol Development

Improving Superchain Incident Response Capabilities

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.

Ecosystem

Open Sourcing Utilities for dApp Developers

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

Engineering

The Endgame for Decentralization in the OP Ecosystem is Stage 2

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 for the OP Stack and the Optimism Collective as it establishes its first security council.

Protocol Development

OP Testnets are migrating from OP Goerli to OP Sepolia.

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!

Engineering

Preparing the ecosystem for multiple chains

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 on smart contract upgrades.

Ecosystem Featured

Providing Easier Access to Testnet ETH Across the Superchain with the Superchain Faucet

Developers need access to testnet tokens so that they can properly deploy, test, and iterate on their contracts in testnet. With this launch of the Superchain Faucet developers will now be able to access testnet ETH for any OP Chain.