Aurum · Biometric Unlock
Aurum · Biometric Unlock is a production-ready Web3 Flutter screen from FlutterKit Pro, installable with flutterkit add web3-auth-biometric-prompt.
The biometric app-lock gate for the Aurum self-custody wallet, on a near-black #0B0E11 canvas. A 160px fingerprint sits centred, drawn entirely by a _FingerprintPainter whose ridges fill from slate-grey (#2B3139) up to brand gold (#F0B90B) as a single 1700ms AnimationController drives its progress from 0 to 1. While scanning, a bold 'Scanning…' title sits over the muted line 'Hold still while we verify your fingerprint'; on completion the painter flips to a green (#2EBD85) success tick and the copy swaps to 'Unlocked' / 'Welcome back to Aurum'. The print is tappable to restart a scan, and a gold 'Use passcode instead' TextButton offers a fallback. A status listener fires the injected onUnlocked callback 650ms after the scan completes — via a cancellable Timer that is torn down in dispose() so nothing leaks. Pure Flutter with a bundled Inter font, forced dark theme, one CustomPainter and no network images, wired only through onUnlocked and onUsePasscode callbacks so it drops into any auth flow.
Reveal the one-line command to drop this screen into your project.
Licensed for unlimited commercial projects · resale prohibited · License
What's included
- ✓_FingerprintPainter — a 160px custom-painted fingerprint whose ridges fill slate→gold by animation progress and flip to a green success tick
- ✓Single AnimationController (1700ms) with a status listener that drives the scan and the done state
- ✓Cancellable Timer firing onUnlocked 650ms after the scan completes, cleaned up in dispose() for a leak-free teardown
- ✓Tap-to-rescan GestureDetector plus a gold 'Use passcode instead' TextButton fallback
- ✓State-driven copy that swaps 'Scanning… / Hold still…' for 'Unlocked / Welcome back to Aurum'
- ✓onUnlocked and onUsePasscode VoidCallback hooks, bundled Inter font and forced dark theme — self-contained route
Use cases
- ✓Biometric app-lock gate for a self-custody crypto or web3 wallet
- ✓Face/Touch-ID-style re-authentication when the app returns to foreground
- ✓Secure re-entry step before revealing balances or signing a transaction
- ✓Reusable fingerprint-scan animation for any dark-themed fintech app
