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Announcing OPCraft: an Autonomous World built on the OP Stack

Guest Post Featured

Announcing OPCraft: an Autonomous World built on the OP Stack

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

Earn NFTs while learning about popular apps on OP Mainnet

Earn NFTs while learning about popular apps on OP Mainnet

Explore the Optimism app ecosystem with Quests

OP in Paris: Rollup Recap

OP in Paris: Rollup Recap

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

Drippie: How OP Mainnet automates Ethereum

Drippie: How OP Mainnet automates Ethereum

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. This isn’t an impossible problem — but it’s enough of nuisance that it’s worth automating.

Making OP Mainnet more accessible — meet Get Started

Making OP Mainnet more accessible — meet Get Started

Guiding new users to their first transaction on Optimism.

Optimism is Migrating From Kovan to Goerli Testnet

Protocol Development

Optimism is Migrating From Kovan to Goerli Testnet

💡Note: OP Kovan has been decommissioned as of 10/5/2022. The Kovan testnet has been deprecated by the Ethereum community, with only two validators remaining. To avoid disruptions on a network that is no longer actively maintained, we’ve started the process of migrating our testnet from OP Kovan

Introducing Bedrock

Protocol Development

Introducing Bedrock

Bedrock is the cheapest, fastest, and most advanced rollup architecture. Ever. 💡Read up on the specific changes to OP Mainnet for developers coming with the Bedrock release here. Optimism has always tried to stay on the cutting edge of rollup architecture. Last year, we introduced the concept of EVM Equivalence,

Reliability and Hardening

Protocol Development

Reliability and Hardening

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 without worrying about how users could access the network. As we grew, we realized we needed more than a simple domain alias

CANNON CANNON CANNON: Introducing Cannon

CANNON CANNON CANNON: Introducing Cannon

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 became the first public fault proof implementation that can run an EVM-equivalent L2. Oh, and it also enables the theoretical minimum calldata gas costs. From

The Road to Sub-dollar Transactions, Part 2: Compression Edition

Protocol Development

The Road to Sub-dollar Transactions, Part 2: Compression Edition

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 is cost. Within the next month we will be decreasing fees 30–40% by deploying the first ever system-wide calldata compression on any

ETHDenver: Rollup Recap

ETHDenver: Rollup Recap

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 of unabated excitement and dopamine depletion. Call it the ETHDenver detox. While it’s true that all good things must come

The Road to Sub-dollar Transactions Part 1: Slashing Fees by 30%

The Road to Sub-dollar Transactions Part 1: Slashing Fees by 30%

Sup nerds! Last month was OP Mainnet’s 1-year mainnetiversary. We’re incredibly proud of this milestone — but the path is far from over. As rollups mature, the path to sub-dollar fees begins. About a month ago, we took the next step down this path, cutting transaction fees by about

Introducing Smock v2

Introducing Smock v2

Solidity devs: meet Smock v2 [https://github.com/defi-wonderland/smock]. The S olidity mocking library. A collaboration between Optimism [https://twitter.com/optimismPBC] and the fantastic team over at DeFi Wonderland [https://twitter.com/DeFi_Wonderland]. Smart contract testing has historically been… hard? If not hard, then just confusing. Way

A Love Letter to Etherscan

A Love Letter to Etherscan

Dearest Etherscan, How to describe what you mean to us? Let us count the ways. You are… * The stable provider of knowledge. * The humble watcher of the realm. * The telescope with which we marvel upon the decentralized heavens. * The bedrock on which the house of DeFi stands. * The quiet knight

The Missing Message Mystery

The Missing Message Mystery

This is the story of our experience looking into a bug that caused our Optimistic Ethereum testnet deployment [https://community.optimism.io/docs/developers/networks.html#optimistic-kovan] to stop accepting new L1 ⇒ L2 deposits for a period of several days in the early days of June 2021. For some context,