Slow payment methods vs CLTV expiry and channels force closure

[Reckless-Satoshi]

In the initial days of operation of RoboSats several orders have been placed with payment method "cash by mail". This is indeed a very good privacy preserving payment method. However, the platform is designed with instant payment methods in mind and the time to expiry of the fiat exchange step is only 4 hours. That is rarely enough for ordinary mail to arrive :)

It is however, possible to create an "Advanced settings" tab in the OrderMaker page, where makers can bump up the CLTV expiry of the bonds and escrow for that specific order to a much greater duration. This can prove however dangerous: the risk of force closure during a trade grows the longer it is open,other concurrent HTLCs being stuck might leave the trade without collateral (or settling the escrow and all bonds...). Long trades are more likely to have issues.

This is a feature to pay attention to once short-term duration trades are running smoothly.