Ethereum

I am excited about the future of the Superchain with interoperability.

Check out Supersim (https://github.com/ethereum-optimism/supersim) 

Supersim is a lightweight tool to simulate the Superchain locally (with a single L1 and multiple OP-Stack L2s).

✨ Features
* spin up multiple anvil nodes
* predeployed OP Stack contracts and useful mock contracts (ERC20)
* fork multiple remote chains (fork the entire Superchain)
* simulate L1 <> L2 message passing (deposits) and L2 <> L2 message passing (interoperability)