To work with Ethereum you need node. You can create your own node or register on services that provide access to node. For example Chainstack. After registration you need to choose net: Ethereum Goerli Testnet, Ethereum Sepolia Testnet etc.
To turn on Ethereum make the following changes in the configuration file:
# global/config.yaml ... # enabled paymentInterfaces - true paymentInterfaces: enabled: true ... # select currency name evm: # select currency id and turn on it - id: ETHEREUM-PI enabled: true ... # enter the nodes url url: "https://nd-900-465-297.p2pify.com/86cbca1a70193ee4942de1810b68dba2" ...