🎉 We are deprecating the Optimism SDK and migrating all tutorials to use viem/op-stack. Read more →

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BUILDERS
Notices (README)
- Preparing for Optimism SDK deprecation
App developers
Chain operators
Node operators
Wallets & CEXs
- Guide for exchanges
- Guide for wallets
Developer tools
OP MAINNET
Getting started: OP Mainnet
Networks and RPC Endpoints
Contract addresses
Bridged token addresses
Identity
Testing
- Running a local development environment
- Testing apps on OP Mainnet
Security
OP STACK
Getting started: OP Stack
Differences between Ethereum and OP Stack chains
Superchain explainer
Design philosophy & principles
OP Stack components
Smart contracts
Rollup
Fault proofs
Transactions
Features
- SendRawTransactionConditional
Security
- Security FAQs
- Pause and unpause the Bridge
Experimental
OP Contracts Manager
Interoperability
Beta features
- Custom gas token
- Alt-DA Mode
Research
- Block time research
CONNECT
Contribute
Resources
- Changelog (opens in a new tab)
- Glossary
Get Launch Support (opens in a new tab)
Optimism Governance (opens in a new tab)

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OP Stack

Beta features

Beta Features

Documentation covering Alt Da Mode, Custom Gas Token in the Beta Features section of the OP Stack ecosystem.

Alt-DA Mode explainer Custom Gas token explainer

How to transfer a SuperchainERC20 Custom gas token

OP Documentation