Re: [w3ctag/design-reviews] requesting a TAG review of making the "total" field optional in PaymentRequest API (#512)

Hi @hober ,

Note that whether the total is optional or not, it's up to the payment apps to decide whether to show the total price - this proposal doesn't change this behaviour. Whether before or after the proposal, if the payment apps would like to over-charge the users (more than the requested total amount), they can do that. After all, it's the payment apps who have the access to the users' wallets. Also because of that, they would need to show the final charge to the users before the transaction so as to maintain the users' trust.

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