How do you obtain the Omnic address

[cymqqqq]

Hi, I have read all the omnic code
but I can not find where the omnic address obtained
how do you generate the omnic address?

[ccyanxyz]

You mean omnic contract address on Ethereum?

[cymqqqq]

yes, correct. like this:
dfx canister --network ic call proxy add_chain "(80001:nat32, vec {"https://polygon-mumbai.g.alchemy.com/v2/0QCHDmgIEFRV48r1U1QbtOyFInib3ZAm\"}, principal "$(dfx canister --network ic id mumbai-gateway)", "2F711bEbA7a30242f4ba24544eA3869815c41413", 28370114:nat64)"
so, if I want to add an evm testnet to config.json for myself, how can I get the omnic contract address?("2F711bEbA7a30242f4ba24544eA3869815c41413")