GetChannel
GetChannel returns the stored channel record for channelId. Apps need this to look up the counterparty channel id when constructing packets to send via BatchSend (the core no longer auto-derives it from a sender-side helper).
Command
gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/onbloc/ibc/union/core.GetChannel()"
Result