Should abort swap always be available?

[sedited]

[Lederstrumpf]

I lean towards supporting this. My 4 cents:

1. It unfortunately facilitates the non-free option of swaps being aborted if exchange rate develops unfavorably (user's local utility), and therefore weakens the atomic swap market (global utility). On the other hand, if the exchange rate moves dramatically the swap, given loss aversion, it's better for global utility to avoid the losses of the aborting party than to protect the swaps success artificially (see 3.).

2. The non-free option is less of a concern than the free option prior to locking, which we're still left with anyway.

3. If we don't support it, then someone will either eventually modify the(ir) node or manually enforce this by killing their daemon and restoring from checkpoint once proceeding with protocol is no longer safe, or the counterparty has already initiated refund.

4. Following design principle of providing users with the software that maximizes their own utility, we should support aborting swaps at all times in the default software.