updated README.rst

Author: Vladimir Kalyuzhny

README.rst

@@ -0,0 +1,163 @@
+.. |liqpaylogo| image::  https://www.liqpay.ua/1508940109424071/static/img/images/logo.svg
+
+=====
+|liqpaylogo| SDK-Python
+=====
+
+:Version: 1.1.0
+:Web: https://www.liqpay.ua/
+:Download: https://pypi.python.org/pypi/liqpay-python
+:Source: https://github.com/liqpay/sdk-python
+:Documentation: https://www.liqpay.ua/documentation/en/
+:Keywords: liqpay, privat24, privatbank, python, internet acquiring, P2P payments, two-step payments
+
+
+What python version is supported?
+============
+- Python 2.7
+- Python 3.4, 3.5, 3.6
+
+Get Started
+============
+1. Sign up in https://www.liqpay.ua/en/authorization.
+2. Create a company.
+3. In company settings, on API tab, get **Public key** and **Private key**.
+4. Done.
+
+Installation
+============
+From pip
+::
+    $ pip install liqpay-python
+
+From github
+::
+    $ pip install git+https://github.com/liqpay/sdk-python#egg=liqpay
+
+Working with LiqPay Callback locally
+============
+If you need debugging API Callback on local environment use https://localtunnel.github.io/www/
+
+How it use?
+============
+
+Example 1: Basic
+-------
+
+**Backend**
+
+::
+
+    liqpay = LiqPay(public_key, private_key)
+    html = liqpay.cnb_form({
+        'action': 'pay',
+        'amount': '1',
+        'currency': 'USD',
+        'description': 'description text',
+        'order_id': 'order_id_1',
+        'version': '3'
+    })
+
+**Frontend**
+
+Variable ``html`` will contain next html form
+
+::
+
+    <form method="POST" action="https://www.liqpay.ua/api/3/checkout" accept-charset="utf-8">
+        <input type="hidden" name="data" value="eyAidmVyc2lvbiIgOiAzLCAicHVibGljX2tleSIgOiAieW91cl9wdWJsaWNfa2V5IiwgImFjdGlv
+        biIgOiAicGF5IiwgImFtb3VudCIgOiAxLCAiY3VycmVuY3kiIDogIlVTRCIsICJkZXNjcmlwdGlv
+        biIgOiAiZGVzY3JpcHRpb24gdGV4dCIsICJvcmRlcl9pZCIgOiAib3JkZXJfaWRfMSIgfQ=="/>
+        <input type="hidden" name="signature" value="QvJD5u9Fg55PCx/Hdz6lzWtYwcI="/>
+        <input type="image"
+        src="//static.liqpay.ua/buttons/p1ru.radius.png"/>
+    </form>
+
+Example 2: Integrate Payment widget to Django
+-------
+`Payment widget documentation`_
+
+.. _`Payment widget documentation`:
+    https://www.liqpay.ua/documentation/en/api/aquiring/widget/
+
+**Backend**
+
+views.py
+
+::
+
+    from liqpay import LiqPay
+
+    from django.views.generic import TemplateView
+    from django.shortcuts import render
+    from django.http import HttpResponse
+
+    class PayView(TemplateView):
+    template_name = 'billing/pay.html'
+
+    def get(self, request, *args, **kwargs):
+        liqpay = LiqPay(settings.LIQPAY_PUBLIC_KEY, settings.LIQPAY_PRIVATE_KEY)
+        params = {
+            'action': 'pay',
+            'amount': '100',
+            'currency': 'USD',
+            'description': 'Payment for clothes',
+            'order_id': 'order_id_1',
+            'version': '3',
+            'sandbox': 0, # sandbox mode, set to 1 to enable it
+            'server_url': 'https://test.com/billing/pay-callback/', # url to callback view
+        }
+        signature = liqpay.cnb_signature(params)
+        data = liqpay.cnb_data(params)
+        return render(request, self.template_name, {'signature': signature, 'data': data})
+
+    @method_decorator(csrf_exempt, name='dispatch')
+    class PayCallbackView(View):
+        def post(self, request, *args, **kwargs):
+            liqpay = LiqPay(settings.LIQPAY_PUBLIC_KEY, settings.LIQPAY_PRIVATE_KEY)
+            data = request.POST.get('data')
+            signature = request.POST.get('signature')
+            sign = liqpay.str_to_sign(settings.LIQPAY_PRIVATE_KEY + data + settings.LIQPAY_PRIVATE_KEY)
+            if sign == signature:
+                print('callback is valid')
+            response = liqpay.decode_data_from_str(data)
+            print('callback data', response)
+            return HttpResponse()
+
+urls.py
+
+::
+
+    from django.conf.urls import url
+
+    from billing.views import PayView, PayCallbackView
+
+
+    urlpatterns = [
+        url(r'^pay/$', PayView.as_view(), name='pay_view'),
+        url(r'^pay-callback/$', PayCallbackView.as_view(), name='pay_callback'),
+    ]
+
+**Frontend**
+
+::
+
+    <div id="liqpay_checkout"></div>
+    <script>
+        window.LiqPayCheckoutCallback = function() {
+            LiqPayCheckout.init({
+                data: "{{ data }}",
+                signature: "{{ signature }}",
+                embedTo: "#liqpay_checkout",
+                mode: "embed" // embed || popup,
+            }).on("liqpay.callback", function(data){
+                console.log(data.status);
+                console.log(data);
+            }).on("liqpay.ready", function(data){
+                // ready
+            }).on("liqpay.close", function(data){
+                // close
+            });
+        };
+    </script>
+    <script src="//static.liqpay.ua/libjs/checkout.js" async></script>