Re: [w3c/browser-payment-api] Why is details.total.amount.value not a number? (#301)

Representing amounts in payments as floating point numbers is generally accepted as a bad idea. Amounts should be represented as decimals.

I believe the most widely used definition of a decimal type is the XML Schema Decimal Type which is used outside of XML as a way to define decimals [1].

[1] https://www.w3.org/TR/xmlschema-2/#decimal

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