Offer lnurl-pay QR codes for download on the Lightning page

app/views/services/lightning/index.html.erb

@@ -39,7 +39,7 @@
       <button id="hide-setup-code" class="hidden btn-md btn-blue w-full sm:w-auto">Hide setup QR code</button>
     </p>
     <p id="setup-code" class="hidden my-10 w-full text-center">
-      <%= raw @svg %>
+      <%= raw @lndhub_qr_svg %>
     </p>
   </section>
 
@@ -88,6 +88,24 @@
       </p>
     </div>
   </section>
+
+  <section class="mb-12">
+    <h3>QR Code for Donations/Tips</h3>
+    <p>
+      You can print out or publish a QR code for people to scan with their
+      wallet apps, so they can send you sats without a direct personal
+      interaction (for example at a concert, or on your website).
+    </p>
+    <p class="my-6 text-center md:text-left">
+      <%= link_to "Download SVG file",
+                  qr_lnurlp_services_lightning_index_path(format: "svg"),
+                  class: "btn-md btn-blue w-full sm:w-auto"%>
+      <span class="mx-2 my-2 md:my-0 block md:inline">or</span>
+      <%= link_to "Download PNG file",
+                  qr_lnurlp_services_lightning_index_path(format: "png"),
+                  class: "btn-md btn-blue w-full sm:w-auto"%>
+    </p>
+  </section>
 <% end %>
 
 <script type="text/javascript">