Add Brazillian PIX payment integration

[Peixer]

Using as reference issue #202, it would be great to have PIX integration.

[0xSachinK]

Hi. Thanks for letting us know! I am curious about the market penetration of Mercado Pago in Brazil. And if you have a Brazilian account on Mercado Pago let us know if you would be down for giving us a quick walk-through of the app.

[Peixer]

@0xSachinK I'm open to helping with anything but I don't have a Mercado Pago account. I think there are other providers that you can use to integrate with PIX.

[0xSachinK]

@Peixer gotcha. Could you give me your TG. We can continue the conversation there.

[veigajoao]

I'm also very interested in this and would be able to help.
Mercado pago is usually used by vendors to accept credit card and PIX payments, but p2p pix transaction use local banks. I'd suggest integrating with Nubank or Banco do Brasil, they have the most customers (90mi and 65mi)