I have some doubts about the closure of a lightning network channel. As far as I know, there can be (al least) 4 different scenarious:
- one node decides to close the channel, and the other one accept the decision. The channel is then succesfully closed.
- one node decides to close the channel, but the other node doesn't respond to its request. A time period passes, and the channel will be closed with the transaction of the first node.
In this case, what would happen if a user tries to close the channel with a malicious transaction (i.e., with an older transaction), and the other user doesn't respond?
- one node decides to close the channel with an older transaction, and the other node claim all the funds due to a malicious intention.
- one node decides to close the channel but the other node refuses.
Is it possible this scenario? What would happen in this case?