sender(e.g. A) to a
receiver(e.g.) B, so : A -> B. Raiden Network has bidirectional channels and you can send A <-> B (even if you don't have a channel opened directly between A and B).
" But just merging an EIP doesn't do anything. This EIP doesn't require a hard fork. It just proposes a convention.
You have to convince client developers to implement the proposed convention.
store microraiden signatures on chain?