When two ilp-kits peer, they have to agree on a trustline balance. This is an inconvenience which is currently solve manually by the two admins. We need to find an automated way to do this instead.
For instance, if we introduce peering request notifications, then the first admin to peer can choose the currency. Or even if not, one peer can send a hello message (see #92), and propose a currency in there for the other peer to accept.
Another option is if admin1 peers with admin2 by first opening a user account at ilp-kit2, and then using those credentials to set up the peering (that's the flow I'm using for testnet1).