Very good point.

Two possible responses come to mind.

1. Cross-asset brokers charge a standard option premium to perform the 
brokerage. I can't tell if you think this is totally broken or if it's just 
sad. I don't understand lightning well enough to figure that out on my own - 
could you expand more on what effects this would have?

2. Cross-asset brokers require counterparties to issue them a symmetric but 
slightly more out-of-the-money call, which they can redeem in the event of a 
large FX swing. This bounds their FX losses.


‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, December 27, 2018 1:43 PM, ZmnSCPxj via Lightning-dev 
<> wrote:

>     HTLCs allow creation of American Call Options.

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