Your might want to specify a family, your router belongs to. There are two possibilities: create new family or joing to existing.
You must create family self-signed certificate and key.
The only key type supposted is prime256v1. Use the following list of commands:
openssl ecparam -name prime256v1 -genkey -out <your family name>.key openssl req -new -key <your family name>.key -out <your family name>.csr touch v3.ext openssl x509 -req -days 3650 -in <your family name>.csr -signkey <your family name>.key -out <your family name>.crt -extfile v3.ext
Once you are done with it place
How to join existing family
Once you and that family agree to do it, they must give you .key and .crt file and you must place in
Publish your family
Run i2pd with parameter 'family=