The vulcan committee is the verification layer that sits in between apps and the chain.
Micro-rollups can connect to the vulcan layer with this endpoint
The Stackr testnet is based on a private EVM node. This means that you can use any Ethereum tools to deploy on the testnet. The configuration is as follows:
RPC URL: http://rpc.stf.xyz
Chain ID: 42069
Explorer: http://rpc.stf.xyz:3000
token: ETH
Faucet: http://rpc.stf.xyz:4000
(yeah the explorer URL is funny ._. please bear with us)