You exploit this by spending the ecash before giving a copy to someone with a device that would brick itself under this scenario.
You exploit this by selling such devices that would brick themselves like this.
You exploit this as a mint by sending invalid ecash to begin with and earning referral codes for selling such devices, and after bricking enough devices, rug the users
> You exploit this by spending the ecash before giving a copy to someone with a device that would brick itself under this scenario.
Ecash from a peer is handled differently than ecash from the mint. This was addressed already.
> You exploit this by selling such devices that would brick themselves like this.
Ack. Willl just release the FOSS for it then.
> You exploit this as a mint by sending invalid ecash to begin with and earning referral codes for selling such devices, and after bricking enough devices, rug the users
This is orthogonal to the scenario proposed and applicable to ecash mints in general.
