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by joshcartme 5068 days ago
What part of it looks hard?

Depending on your programming knowledge integrating a payment gateway shouldn't be too hard. Take a look at some of the ones that have already been done: https://bitbucket.org/stephenmcd/cartridge/src/5be5cd01496b/...

If you look at the Authorize.net one for example, most of the lines of code are setting up the POST data. The actual posting is only about 6 lines or so.