How to implement a local payment method API into a Shopify cart?

Hi, I am trying to implement a payment method used by locals into Shopify. This is their API https://github.com/evertec/athmovil-javascript-api

As you can I see, I need JSON to get the cart information and pipe it trough the API so it can get the items, shipping, totals,etc.

I’ve worked on other CMS’s before but I am new at Shopify, and I see that it uses a templating language, I need a bit of guidance as to where would be the correct file to paste this code in, and how to get access to the Cart’s JSON or API if possible. I’d appreciate a steer in the right direction.

Dan

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This should help → https://help.shopify.com/en/themes/development/getting-started/using-ajax-api#shopify-ajax-api-reference

Good luck ?

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Hi, did you get through with this successfully, i would love to add ATH Movil to my website as well. Your guidance would be appreciated.

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Hi. Were you able to implement ATH Movil in your website?

Hi. Were you able to add ATH Movil to your website?