Re: [w3c/webpayments] [Tokenized Card Payment] TokenCardRequest should inherit from BasicCardRequest (#212)

Fair point, I’ll update it

From: Nick Shearer <notifications@github.com>
Reply-To: w3c/webpayments <reply@reply.github.com>
Date: Monday, February 13, 2017 at 6:08 PM
To: w3c/webpayments <webpayments@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Subject: [w3c/webpayments] [Tokenized Card Payment] TokenCardRequest should inherit from BasicCardRequest (#212)


Ian requested some feedback on this proposal, which I am happy to provide. Note that my feedback should not be taken as an endorsement of the proposal itself.

The payment response of a tokenized card inherits from the basic card spec:

dictionary TokenizedCardResponse : BasicCardResponse {

    required DOMString cardLast4;

             DOMString tokenType;

             DOMString tokenRequesterId;

};

...but the request does not:

enum TokenCardType {

    "emv",

    "issuer"

};



dictionary TokenCardRequest {

    sequence<DOMString>     supportedNetworks;

    sequence<TokenCardType> supportedTypes;

};

Additionally, it seems to me that basic card payment supports limiting the type of card whereas tokenized card does not:

enum BasicCardType {

    "credit",

    "debit",

    "prepaid"

};



dictionary BasicCardRequest {

    sequence<DOMString>     supportedNetworks;

    sequence<BasicCardType> supportedTypes;

};

Since it is a fairly common use case to limit payment to debit cards (versus credit) I wonder why tokenized card doesn't support this. If TokenCardRequest inherited from BasicCardRequest and renamed itssupportedTypes property to supportedTokenizationMethods this could be very easily accomplished.

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