A Lightning wallet that feels like handing someone cash.
What is sattle?
sattle is a wallet for Lightning bearer notes (LNURLcash, LUD-25). A bearer note is a link that is the money: receive one and the sats are yours, send one and they move — no invoices to request, no amounts to negotiate, no Lightning jargon to learn. Receiving and sending takes seconds.
It's an installable web app (PWA) that works on any modern phone or desktop, with an Android app wrapping the same experience. Built for people who just want to send and receive.
Highlights
- Instant notes — receive sats as a link or QR code; pass them on the same way. No invoice round-trips, no address book.
- Mint trust, made visible — notes are issued by mints you choose to trust. sattle pins each mint's signing key and asks you to review any key change before accepting it, so a mint can't quietly swap its identity.
- Move funds between mints — rebalance from one mint to another in a few taps.
- Backups that fit your habits — export an encrypted backup file, or let sattle keep an encrypted backup on nostr (kind 30078) that only you can read.
- Passkey and biometric unlock — open the wallet with your device's passkey or fingerprint. A password fallback is always available.
- Connect other apps — built-in Nostr Wallet Connect (NWC) service lets external apps pay from your wallet while sattle is open and unlocked, with per-connection budgets you control.
How it works
sattle uses LNURLcash (LUD-25) bearer notes: each note is a URL that carries spendable Lightning value. Your notes live encrypted on your device — the underlying sats are held by the mints that issued the notes, so choosing and reviewing mints is part of the model, and sattle surfaces that rather than hiding it. Spend a note and the mint pays out over Lightning; receive one and your wallet claims it instantly.
For developers
sattle is a Quasar / Vue 3 PWA with a Capacitor Android wrapper (no signed
release yet). The protocol core is framework-free and lives in
src/lnurlcash/. Contributor docs, architecture notes and
project conventions are in AGENTS.md.