Each NWC wallet connection gets its own shareable LNURL QR so the owner
can receive payments from anyone without creating invoices (the core
LNURL value proposition: a static QR that never expires).
Hub UI (service detail modal):
- New 'Share QR' button on every wallet connection card
- Dedicated share view: large QR, Lightning Address + copy, raw bech32
LNURL + copy
- Download PNG (websites/social), download SVG (vector, print-sharp at
any size), and a Print button that opens a print-ready payment card
which auto-invokes the browser print dialog
Backend (FastAPI, session-authenticated):
- GET /api/nwc/wallets/{id}/lnurl -> alias, lightning_address, LNURL
- GET /api/nwc/wallets/{id}/lnurl-qr.png (?download=1, ?scale=)
- GET /api/nwc/wallets/{id}/lnurl-qr.svg (?download=1)
- GET /api/nwc/wallets/{id}/lnurl-qr/print (print-ready HTML card)
- Stdlib bech32 encoder (BIP-173, verified against the official LUD-01
golden vector); LNURL is uppercased for QR alphanumeric-mode density
per LUD-01 guidance; QR rendered with the existing qrencode package
- Resolves wallets by app id or pubkey; 404 unknown wallet, 503 when no
Lightning domain is configured; all routes return 401 unauthenticated
No new system dependencies.
Co-authored-by: arena-agent <297053741+arena-agent@users.noreply.github.com>
naturallaw777andarena-agent
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