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',
    'language': 'ru|uk|en'
})

liqpay = LiqPay(public_key, private_key)
html = liqpay.checkout_url({
    'action': 'auth',
    'amount': '1',
    'currency': 'USD',
    'description': 'description text',
    'order_id': 'order_id_1',
    'version': '3',
    'language': 'ru|uk|en',
    'recurringbytoken': '1'
})
# Response:

str: https://www.liqpay.ua/api/3/checkout/?data=<decoded data>&signature=<decoded signature>

    <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>

    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()

    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'),
    ]

    <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>