Built-in corresponding token/operator address

Should we list the address of the corresponding network?
Otherwise people would need to dig up the address information (which would be a lot of work for the uninitiated). Or use other tools to setup before you can use it here.

The issue names no files, tests, or entry points. Start by locating the token/operator address setup and network-selection entry points, then confirm the supported networks with maintainers. Done means the corresponding address information is available without requiring separate tools.

Written by the indexing model from the issue text.