Wait for enough confirmations where the payment becomes unlikely to reverse, which of course takes time and that's the more practical blocker for regular shops to accept Bitcoin.
They aren't doing that, in places I've seen, they just take your payment and let you go away with that. (I've never paid myself, but I've seen other customers do so)
If it's raw bitcoin, they couldn't even be sure that the transaction is a valid one (that the wallet has the funds in the first place, not even talking about double spending). I suspect they use some kind of third party like Coinbase, and that there aren't really using bitcoin at all (and just use Coinbase as a bank) but I'm not sure.
littlestymaar|6 years ago
If it's raw bitcoin, they couldn't even be sure that the transaction is a valid one (that the wallet has the funds in the first place, not even talking about double spending). I suspect they use some kind of third party like Coinbase, and that there aren't really using bitcoin at all (and just use Coinbase as a bank) but I'm not sure.
nighthawk24|6 years ago