[Bitcoin-development] Payment Protocol for Face-to-face Payments

[Mike Hearn]

>
> Those locations are completely unsuitable to bitcoin transactions,
> since the receiver cannot verify double-spending or anything else
> about the transaction.


The usual issue is that they lack internet *for some customers*. The place
may well have private wifi or hardwired connections that work. Even mobile
networks may vary so some customers will have mobile connectivity and
others won't.
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