Minimal LNURL kiosk app.

Use sparkkiosk to enable lightning payments from printed QR codes in selfservice kiosks / cafés or other places where POS interaction is not needed or an option.

Log into the dashboard, create a new LNURL, set currency and amount and download QR to print. Monitor latest invoices.

Option to send emails upon lightning invoice settlement - to admin and, if email is provided in wallet comment field, costumer as well. Uses Mailersend - create an account at mailersend.com and create a new template containing these variables:

{$mailtext}, {$datetime}, {$invoiceid},{$itemtext}, {$itemprice}, {$itemcurrency} ->See minimal example: mailersend_template.html.

Input Mailersend API key and template id under 'setttings'

Fiat amounts are converted to satoshis using coingecko API.

Its possible to export all invoices generated by the app for use in external systems (ie invoicing).

Tested with bluewallet - it seems wallet of satoshi has issues with tor endpoints in LNURLS at the moment.

Made for the umbrel app store - simply install and use password provided by Umbrel. If used elsewhere set these environment variables:

APP_PASSWORD
APP_HIDDEN_SERVICE (Tor)
LND_GRPC_MACAROON -> path to LND macaroon
LND_GRPC_CERT -> path to LND cert
LND_GRPC_ENDPOINT -> LND IP
LND_GRPC_PORT -> LND gRPC port

Additional settings are configured in config/defaul.json