Fix paymentToken issue

[markrickert]

This took me a while to figure out, but it seems that while the native code is returning back the paymentToken if the gateway requires nonce tokenization (in my case: braintree) the javascript just drops the dictionary key when it gets the response back from native code.

This PR makes sure that paymentToken is always passed back in the dictionary (even if it's null) and changes the response from JS to include the key/value so we can use it.

[naoufal]

Resolved in #37.

Releasing soon.

[naoufal]

@markrickert Thanks for the PR, appreciated! 👋

[markrickert]

No problem!

[Andreyco]

Current version (0.4.0) works well in our production app, hope you are on same boat ;)

[markrickert]

Nice @Andreyco, I wound up switching to https://github.com/kraffslol/react-native-braintree-xplat/ for my production needs so I'm not actively using this module anymore. I'm glad that my frustration and work could help others though!

[Andreyco]

Out of curiosity... So you ended up with direct credit card payments, correct?
We also used that library + this one. We allow to use Apple Pay for those users that are able to use it (mainly US based) and direct CC payments for the rest of them.

I really like the ease of use and the fact that Apple Pay offers all the validation of input data and that's the main driving force I will try to contribute to this lib.

Anyway, I am glad you shipped ;)

[markrickert]

We wound up using the braintree dropin UI only. Let braintree handle everything and just get the nonce and send to the server so it can process the order on our behalf.