create-checkout-mundipagg-google-app-script.js

// create checkouts
function doGet(request) {
  
  var sk = "sk_xxxxxxxxxxxxxxxxxxx";
  var acceptedAmounts = [ "10", "50" ];
  var amount = request.parameter.amount;
  
  if (!acceptedAmounts.includes(amount)) {
    throw "invalid amount";
  }
  
  var amountInCents = amount * 100;
  
  var payload = 
  {
    "items":[
      {
        "amount": amountInCents,
        "description":"Doação :)",
        "quantity":1
      }
    ],
    "customer": {
      "name":"." // required, only to bypass
    },
    "payments":[
      {
        "amount" : amountInCents, 
        "payment_method":"checkout",
        "checkout": {
          "expires_in":120,
          "billing_address_editable" : true,
          "customer_editable" : true,
          "accepted_payment_methods": ["credit_card" ],
          "credit_card": {
            "installments": [
              {
                "number": 1,
                "total": amountInCents
              }
            ]
          }
        }
      }
    ]
  };

  var user = sk;
  var pass = "";
  var options = {
    "method": 'POST',
    "payload": JSON.stringify(payload),
    "headers" : {
      "Content-Type": "application/json",
      "Authorization": "Basic " + Utilities.base64Encode(user + ":" + pass)
     }
  };

  var response = UrlFetchApp.fetch("https://api.mundipagg.com/core/v1/orders", options);
  var responseObj = JSON.parse(response.getContentText());
   
  var checkout_url = responseObj.checkouts[0].payment_url;
  
  return HtmlService.createHtmlOutput(
    "<script>window.top.location.href=\"" + checkout_url + "\";</script>"
  ); 
}