> A merchant can always refuse the payment and refund it if that's a
> practical problem.

No, they can't, at least not in bitcoin-qt:  when the user pokes the SEND
button, the transaction is broadcast on the network, and then the merchant
is also told with the Payment/PaymentACK round-trip.

Allowing merchants to cancel (e.g. having a PaymentNACK) makes
implementation harder, and brings up nasty issues if we want to allow
CoinJoin or CoinJoin-like transactions as payments to merchants.
 Bitcoin-Qt ALREADY allows you to pay several PaymentRequests with one
transaction; handling the case where one merchant gives you a PaymentACK
and another gives you (or wants to give you) a PaymentNACK is a nightmare.

Gavin Andresen
Rapidly troubleshoot problems before they affect your business. Most IT 
organizations don't have a clear picture of how application performance 
affects their revenue. With AppDynamics, you get 100% visibility into your 
Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
Bitcoin-development mailing list

Reply via email to