Arbitrary Token Bridging


Today we are extremely excited to release a new Gateway interface which enables arbitrary token deposits and withdrawals to Optimistic Ethereum! In the previous major release of the Gateway we allowed tokens listed in the Optimism token list to be transferred to L2 (and back). With this new release we want to open the gates to innovation and allow any ERC20 token to transition the boundary between the layers.

How it works

In developing L2 chains, figuring out how to handle token bridging makes for a complex and tradeoff-rich landscape. Our bridge implementation seeks to provide a balance between the facts that:

  • Innovation should be permissionless: we as a centralized entity should not hold control over what tokens get bridged to L2.

I’ll see you, in L2

This has been one of our most requested features since the Uniswap launch, so we hope you’re as excited as we are!

Scaling Ethereum