someone didn't understand the slides :)
this is precisely not how ecash works. There's no serial number you assign to tokens. It's not possible for the mint to link a received token from its issuance, via SQL or not, only that the issuance was signed by the mint pubkey and therefore the mint should accept it.
Full rundown of the diffie-hellman key exchange here.
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Thanks for info. The slides didn't make that super clear on first pass, but now I see.
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This is a more precise and detailed slide https://lconf.gandlaf.com
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