Close channel immediately. The most popular action. Might be good to lower the trust score of the peer.

Same with the Close in the sense that the peer did something unacceptable to us. But the channel is not open yet.

The error is not critical to the channel operation. But it maybe good to report the log message, or maybe lower the peer score.

The error which should never happen. This implies a bug so we must do something on this Library For the sake of saving funds, the API consumer might attempt a channel close. But they cannot be sure that closing will always succeed.