Your Kosmos user address is also a Lightning Address! The easiest way to receive sats is by just giving out your address:
<%= current_user.address %>
You can connect various wallet apps to your Kosmos account. This allows you to both receive and send sats. Any wallet that supports LNDHub accounts should be able to add/import your account using our setup code/URL:
or
<%= raw @svg %>
Android / iOS / macOS
When adding a wallet, choose "Import wallet" on the bottom of the screen, then scan the setup QR code.
Firefox / Chrome (Opera, Brave, Chromium-based browsers)
Choose "LNDHub (Bluewallet)" in the connect dialog and paste the setup URL in the "LNDHub Export URI" field.