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OP Testnets are migrating from OP Goerli to OP Sepolia.
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!
Nov 27, 2023 1 min read
Preparing the ecosystem for multiple chains
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.
Nov 21, 2023 2 min read
Providing Easier Access to Testnet ETH Across the Superchain with the Superchain Faucet
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.
Nov 9, 2023 2 min read
Introducing the Canyon Hardfork
Engineering

Introducing the Canyon Hardfork

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 upgrade.
Nov 7, 2023 2 min read
The OP Stack’s Fault Proof System is live on OP Goerli
Protocol Development

The OP Stack’s Fault Proof System is live on OP Goerli

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 ecosystem.
Oct 3, 2023 2 min read
The game’s afoot: designing modular dispute games  for the OP Stack’s Fault Proof System
Engineering

The game’s afoot: designing modular dispute games for the OP Stack’s Fault Proof System

A deep dive into dispute games & the role they will play in fault detection in the OP Stack's first fault proof system.
Sep 28, 2023 5 min read
Social Decentralization & the OP Stack’s Fault Proof Virtual Machine
Engineering

Social Decentralization & the OP Stack’s Fault Proof Virtual Machine

This blog post explores the principle of social decentralization, how L2 architecture allows Layer 2s to extend this principle to include proof diversity, and how the Optimism Collective is building its fault proof system to leverage this architecture.
Sep 25, 2023 5 min read
Maximizing fault proof modularity with a composable pre-image oracle
protocol

Maximizing fault proof modularity with a composable pre-image oracle

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.
Aug 23, 2023 3 min read
Using onchain reputation data for testnet funds with the Superchain Faucet
Ecosystem

Using onchain reputation data for testnet funds with the Superchain Faucet

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.
Aug 1, 2023 3 min read
Building a Fault Proof System worthy of the Superchain
Ecosystem

Building a Fault Proof System worthy of the Superchain

An update on technical decentralization and the OP Stack's first Fault Proof System.
Jul 24, 2023 4 min read
Here’s how you can reproduce OP Mainnet’s migration to Bedrock
Engineering

Here’s how you can reproduce OP Mainnet’s migration to Bedrock

On June 6, 2023, OP Mainnet upgraded to Bedrock, and the entire migration process was designed to be verifiable and reproducible.
Jun 26, 2023 4 min read
The OP Stack: Modular, Exponential Scalability for L2s
Protocol Development

The OP Stack: Modular, Exponential Scalability for L2s

The OP Stack's code is EVM-equivalent, secure, performant, and MIT-licensed. The Optimism Ecosystem Contributions Dashboard can help developers get started.
Jun 22, 2023 2 min read
Building op-erigon: how Test in Prod joined the Optimism Collective
Guest Post

Building op-erigon: how Test in Prod joined the Optimism Collective

Test in Prod authors this guest post where they share their journey of discovering the OP Stack and building op-erigon.
Jun 15, 2023 4 min read
Community-Driven Development: Introducing OP Stack Mods

Community-Driven Development: Introducing OP Stack Mods

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, for community feedback.
Jun 1, 2023 4 min read
Multi-proof design in the OP Stack
Protocol Development

Multi-proof design in the OP Stack

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 Ecosystem.
May 19, 2023 3 min read
Building a Decentralized Identity Ecosystem, Together
Ecosystem

Building a Decentralized Identity Ecosystem, Together

The Optimism Collective is building a better economic engine that fuels positive-sum games, and decentralized identity is central to that goal. Decentralized identity not only unlocks democratic governance and innovation, but also empowers individuals to have greater control over their finances and participate in the global economy on their own
May 4, 2023 3 min read
Progressing towards decentralization: highlights from the Keys in Mordor summit
Protocol Development

Progressing towards decentralization: highlights from the Keys in Mordor summit

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? Figure out how to take Optimism’s upgrade keys to Mordor and safely throw them into Mount Doom, rendering the protocol technically decentralized. Attendees
May 1, 2023 4 min read
Improving token discoverability and trust through the Superchain Token List
Ecosystem

Improving token discoverability and trust through the Superchain Token List

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.
Apr 24, 2023 2 min read
Introducing op-erigon: how the Bedrock upgrade unlocks client diversity
Protocol Development

Introducing op-erigon: how the Bedrock upgrade unlocks client diversity

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.
Apr 20, 2023 3 min read
Exploring a new RPC endpoint to support ERC-4337 and account abstraction
Engineering

Exploring a new RPC endpoint to support ERC-4337 and account abstraction

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 it easier for bundlers to succeed.
Apr 4, 2023 2 min read
Increasing Confidence in the OP Mainnet Bridge with Two-Step Withdrawals
Protocol Development

Increasing Confidence in the OP Mainnet Bridge with Two-Step Withdrawals

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.
Mar 22, 2023 3 min read
OP in Denver: Rollup Recap
Events

OP in Denver: Rollup Recap

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.
Mar 10, 2023 2 min read
Here’s How Bedrock will Bring Significantly Lower Fees to OP Mainnet
Protocol Development

Here’s How Bedrock will Bring Significantly Lower Fees to OP Mainnet

This post explores how the Bedrock upgrade will bring 47% reduction in protocol costs and security fees to Optimism Mainnet.
Mar 2, 2023 4 min read
Optimism’s Path to Technical Decentralization
Protocol Development

Optimism’s Path to Technical Decentralization

An update on OP Labs’ goals for advancing Optimism’s technical decentralization.
Feb 23, 2023 2 min read
Bedrock Security Reviews & Audit Competition
Protocol Development

Bedrock Security Reviews & Audit Competition

This article was written in collaboration with Maurelian. 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. The size and complexity of Bedrock means that ensuring the security and stability of the system was
Jan 20, 2023 4 min read
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