LNURL Daemon is a minimalistic Lightning Address and LNURL self-hosted HTTP server. It is intended to run on your node and connect directly to your LND. You may test it by sending some sats to ⚡[email protected] or by scanning the following QR code:

• LUD-01: Base LNURL encoding
• LUD-06: payRequest base spec
• LUD-09: successAction field for payRequest
• LUD-12: Comments in payRequest
• LUD-16: Paying to static internet identifiers
• Multiple customizable accounts
• Lightning Network terminal
• Lightning Network raffle

LND is expected to run on the same machine and user bitcoin is assumed. You also need Go installed.

$ git clone https://github.com/yanascz/lnurld.git
$ cd lnurld
$ go install
$ go build

$ sudo mkdir /etc/lnurld
$ sudo chown bitcoin:bitcoin /etc/lnurld
$ sudo -u bitcoin vim /etc/lnurld/config.yaml

Example configuration with one admin, one user with restricted access, one donate account and one raffle account:

credentials:
  admin: 4dm!nS3cr3t
  guest: S3cr3t
access-control:
  guest: [raffle]
accounts:
  satoshi:
    min-sendable: 1
    max-sendable: 1_000_000
    description: Sats for Satoshi
    is-also-email: true
    comment-allowed: 210
  raffle:
    description: Raffle ticket
    thumbnail: raffle.png
    raffle:
      ticket-price: 21_000
      prizes:
        - Trezor Model T
        - Trezor Model One
        - Trezor Lanyard

(Create image raffle.png in /etc/lnurld/thumbnails if you want it served by lnurld.)

Available configuration properties:

If a property is marked as optional or has a default value, you don’t have to specify it explicitly.

$ sudo mkdir -m 710 /var/lib/lnurld
$ sudo chown bitcoin:bitcoin /var/lib/lnurld

Payment hashes of invoices per account will be stored there.

$ ./lnurld

Alternatively with a custom config file path:

$ ./lnurld --config=/home/satoshi/.lnurld/cfg.yaml

Don’t forget to stop the server before setting up systemd service!

$ sudo cp lnurld /usr/local/bin
$ sudo cp systemd/lnurld.service /lib/systemd/system
$ sudo systemctl start lnurld.service
$ sudo systemctl enable lnurld.service

Now the service should be up and running, listening on configured host and port.

Example nginx configuration for domain nakamoto.example (replace with your own) with Let’s Encrypt SSL certificate:

http {
    #
    # general configuration omitted
    # 

    upstream lnurld {
        server 127.0.0.1:8088;
    }

    server {
        listen       443 ssl http2;
        listen       [::]:443 ssl http2;
        server_name  nakamoto.example;

        ssl_certificate      "/etc/letsencrypt/live/nakamoto.example/fullchain.pem";
        ssl_certificate_key  "/etc/letsencrypt/live/nakamoto.example/privkey.pem";
        ssl_session_cache    shared:lnurld:1m;

        proxy_set_header  X-Forwarded-Proto $scheme;
        proxy_set_header  X-Forwarded-Host $host;

        location /.well-known/lnurlp/ {
            proxy_pass http://lnurld;
        }
        location /ln/ {
            proxy_pass http://lnurld;
        }
    }
}

If you don’t have an SSL certificate, you can get one using Certbot.

Once configured and deployed, you shall be able to send sats to ⚡[email protected] from your LN wallet. If you need to display a QR code, simply navigate to or share https://nakamoto.example/ln/pay/satoshi/qr-code. For a smaller/larger QR code, feel free to append desired size in pixels to the URL, e.g ?size=1024.

Same applies to ⚡[email protected] and https://nakamoto.example/ln/pay/raffle/qr-code with raffle configured. These allow anyone to purchase as many raffle tickets for the configured price as they wish, increasing their chances. Once enough tickets are sold, i.e. at least the same number as there are prizes, you may start drawing winning tickets from the account’s detail page.

To see amount of received sats or raffle for accessible accounts, navigate to https://nakamoto.example/ln/accounts. You’ll need to authenticate using one of the configured username/password pairs. Account stats, QR code and/or payment terminal are accessible from the account’s detail page.

The raffle is stateless so refreshing its page restarts the draw and may produce different winning tickets!

$ cd lnurld
$ git pull
$ ./systemd/deploy.sh

Alternatively checkout a specific branch/tag.