So I'm unclear ... does the merchant bear the risk of a double spend if one happens?
I now see how this is configurable by the merchant:
HIGH speed confirmations typically take 5-10 seconds, and can be used for digital goods or low-risk items. LOW speed confirmations take about 1 hour, and should be used for high-value items.
So High risk/speed is 0/unconfirmed (presumably). and Low risk/speed is six confirmations (presumably), ... what is Medium risk/speed? One confirmation?
I see that if there was a double spend, the merchant is alerted by e-mail and POST.
If at any point we detect a payment to be INVALID you will receive an email and a secure POST immediately. This will only happen if you select the Medium or High risk settings. There is no chance of an invalid payment for Low risk settings.
