feat: QR Code Scanner with SEP-0007 Support#139
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ONEONUORA merged 6 commits intoFracverse:masterfrom Apr 27, 2026
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- parseSep0007Uri: parses web+stellar:pay and web+stellar:tx URIs - buildSep0007PayUri: builds a SEP-0007 pay URI from params - detectQrContentType: classifies scanned QR content - isStellarAddress / isFederatedAddress / isValidStellarDestination helpers - Full TypeScript types for pay and tx operation params
Wraps expo-camera's useCameraPermissions with a clean interface: - granted / denied / undetermined state flags - loading state during permission request - requestPermission() async helper
- Live camera feed via expo-camera CameraView - Barcode scanner restricted to QR type - Flash toggle (on/off) - Gallery picker via expo-image-picker - Manual address / URI entry fallback - SEP-0007 pay and tx URI parsing with payment preview - Plain Stellar G-address and federated address detection - Payment details preview screen (recipient, amount, asset, memo) - Confirm → navigates to /transfer pre-filled with scanned params - Graceful error screen for invalid QR codes with retry - Camera permission request and denied state with Settings deep-link - Responsive scanner viewport (tablet-aware) - Corner bracket overlay for scan target UX - Accessibility labels and roles throughout
- Replace QR placeholder icon with react-native-qrcode-svg - External wallet receive generates a web+stellar:pay URI via buildSep0007PayUri - BLINKS ID receive shows blinkId as QR value - Wire up Copy ID button with Clipboard + toast feedback - Import buildSep0007PayUri from sep0007 utils
- Build web+stellar:pay URI with destination, amount, asset_code, memo - Replace JSON payload with standards-compliant SEP-0007 URI - Add Share functionality to share the URI directly - Any SEP-0007 compatible wallet can now scan and pay the merchant
- expo-camera: live camera feed + QR barcode scanning - expo-image-picker: gallery access for QR image selection
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Implements a fully functional QR code scanner with SEP-0007 payment URI support, enabling scan-to-pay and receive-via-QR flows across both personal and merchant accounts.
Changes
New files
src/utils/sep0007.ts— SEP-0007 URI parser, validator, and builder. Handlesweb+stellar:payandweb+stellar:txoperations, validates Stellar G-addresses and federated addresses, and exportsbuildSep0007PayUrifor QR generation.src/hooks/useCameraPermission.ts— Thin hook wrappingexpo-camera's permission API withgranted / denied / undetermined / loadingstate and arequestPermission()helper.Modified files
app/scan.tsx— Full rewrite. Live camera feed viaexpo-camera, QR-only barcode scanner, flash toggle, gallery picker, manual address/URI entry fallback, SEP-0007 payment preview screen, graceful error handling, and camera permission flow with Settings deep-link.app/receive.tsx— Replaces the QR placeholder icon with a realreact-native-qrcode-svgQR. External wallet mode generates aweb+stellar:payURI; Copy ID button now writes to clipboard with toast feedback.app/merchant/qr-code.tsx— Merchant QR now encodes a SEP-0007 URI (destination + amount + asset + memo) instead of a raw JSON blob, making it scannable by any SEP-0007 compatible wallet. Share button shares the URI directly.Dependencies added
expo-camera— camera feed + QR barcode scanningexpo-image-picker— gallery accessAcceptance criteria met
Notes for reviewers
MERCHANT_STELLAR_ADDRESSandwalletAddressinreceive.tsxare placeholder values — these should be wired to the authenticated wallet address from the auth/wallet context once that layer is in place.expo-camera's static API; the gallery button currently guides users to use the camera or manual entry. A dedicated image QR decoder library can be added in a follow-up if needed.closes #95