NUT-18 Payment Requests: Make mints mandatory #227
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lollerfirst
approved these changes
Feb 17, 2025
Co-authored-by: lollerfirst <43107113+lollerfirst@users.noreply.github.com>
Co-authored-by: lollerfirst <43107113+lollerfirst@users.noreply.github.com>
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A merchant can receive tokens from any mint if they melt the token to their LN wallet before regarding the transaction as settled. |
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The Receive to Trusted Mint functionality (via Lightning) can help here too. |
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This also removes the use case for something like a donation address where the receiver does not care what mint it is from as it is funds it would not receive anyway. Then as pointed out above the receiver can swap or melt as they see fit. |
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concept nACK |
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A core aspect of cashu is that users must somewhat trust the mints. This means receivers shouldn't receive tokens from just any mint. For merchants this is an existential distinction, so for them this becomes less a recommendation and more an imperative. Otherwise, accepting tokens from any mint as payment for goods and services is a sure way to be defrauded, allowing e.g. any fakewallet payment to be accepted as real.
Since this NUT is targeted at merchants, it has to indicate that receivers MUST indicate a list of trusted mints in their Payment Requests.