Yeah, for those cases one person has to be online (using P2PK for example).
ECB promises offline payment without a trace for the digital euro. I am curious how they avoid double spending 😁
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Black box hw chips. Manufactured at 3nm scale. Nobodys gonna crack that to double spend 100 euros.
So merchant and customer, both need ECB hardware? That's a stupid plan.
But profitable? 😂
