feat: use real widget uris for PFi

frontend/ios/Runner/Info.plist

@@ -5,7 +5,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
-	<string>Flutter Starter</string>
+	<string>DIDPay</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>

frontend/lib/features/account/account_did_page.dart

@@ -13,7 +13,7 @@ class AccountDidPage extends HookConsumerWidget {
       appBar: AppBar(title: const Text('My DID')),
       body: Padding(
           padding: const EdgeInsets.symmetric(horizontal: 20.0),
-          child: Center(child: SelectableText(did))),
+          child: Center(child: SelectableText(did.uri))),
     );
   }
 }

frontend/lib/features/account/account_providers.dart

@@ -1,3 +1,4 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:tbdex/tbdex.dart';
 
-final didProvider = Provider<String>((ref) => throw UnimplementedError());
+final didProvider = Provider<Did>((ref) => throw UnimplementedError());

frontend/lib/features/home/home_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_starter/features/pfis/pfi_providers.dart';
 import 'package:flutter_starter/features/pfis/pfi_verification_page.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:tbdex/tbdex.dart';
 
 class HomePage extends HookConsumerWidget {
   const HomePage({super.key});
@@ -16,14 +17,22 @@ class HomePage extends HookConsumerWidget {
           ...pfis.map(
             (pfi) => ListTile(
               title: Text(pfi.name),
-              subtitle: Text(pfi.id),
+              subtitle: Text(pfi.didUri),
               trailing: const Icon(Icons.chevron_right),
-              onTap: () {
-                Navigator.of(context).push(
-                  MaterialPageRoute(
-                    builder: (_) => PfiVerificationPage(pfi: pfi),
-                  ),
-                );
+              onTap: () async {
+                final result = await DidDht.resolve(pfi.didUri);
+                final widgetService = result.didDocument?.service
+                    ?.firstWhere((e) => e.type == 'kyc-widget');
+                if (widgetService?.serviceEndpoint != null) {
+                  // ignore: use_build_context_synchronously
+                  Navigator.of(context).push(
+                    MaterialPageRoute(
+                      builder: (_) => PfiVerificationPage(
+                        widgetUri: widgetService!.serviceEndpoint,
+                      ),
+                    ),
+                  );
+                }
               },
             ),
           )

frontend/lib/features/pfis/pfi.dart

@@ -1,11 +1,11 @@
 class Pfi {
   final String id;
   final String name;
-  final String widgetUrl;
+  final String didUri;
 
   Pfi({
     required this.id,
     required this.name,
-    required this.widgetUrl,
+    required this.didUri,
   });
 }

frontend/lib/features/pfis/pfi_providers.dart

@@ -3,16 +3,20 @@ import 'package:hooks_riverpod/hooks_riverpod.dart';
 
 final pfisProvider = Provider<List<Pfi>>(
   (ref) => [
+    Pfi(
+      id: 'prototype',
+      name: 'Prototype PFI',
+      didUri: 'did:dht:3x1hbjobt577amnoeoxcenqrbjicym5mgsx6c6zszisf1igfj51y',
+    ),
     Pfi(
       id: 'africa',
       name: 'Africa',
-      widgetUrl: 'https://tbd.website',
+      didUri: 'coming soon...',
     ),
     Pfi(
       id: 'mexico',
       name: 'Mexico',
-      widgetUrl:
-          'https://robustdisastrousstartups.wesbillman.repl.co/?proof=moeisreal&callback_uri=didpay://wes',
+      didUri: 'coming soon...',
     ),
   ],
 );

frontend/lib/features/pfis/pfi_verification_page.dart

@@ -1,14 +1,14 @@
 import 'package:webview_flutter/webview_flutter.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_starter/features/pfis/pfi.dart';
 
 class PfiVerificationPage extends StatelessWidget {
-  final Pfi pfi;
+  final String widgetUri;
 
-  const PfiVerificationPage({required this.pfi, super.key});
+  const PfiVerificationPage({required this.widgetUri, super.key});
 
   @override
   Widget build(BuildContext context) {
+    final fullPath = '$widgetUri?proof=moegrammer&callback_uri=didpay://kyc';
     final controller = WebViewController()
       ..setBackgroundColor(Theme.of(context).colorScheme.background)
       ..setNavigationDelegate(
@@ -28,7 +28,7 @@ class PfiVerificationPage extends StatelessWidget {
           },
         ),
       )
-      ..loadRequest(Uri.parse(pfi.widgetUrl));
+      ..loadRequest(Uri.parse(fullPath));
 
     return Scaffold(
       appBar: AppBar(title: const Text('PFI Verification')),

frontend/lib/main.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:flutter_starter/features/account/account_providers.dart';
 import 'package:flutter_starter/features/app/app.dart';
+import 'package:flutter_starter/services/secure_storage_key_manager.dart';
 import 'package:flutter_starter/services/service_providers.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:tbdex/tbdex.dart';
@@ -14,8 +15,8 @@ void main() async {
     aOptions: AndroidOptions(encryptedSharedPreferences: true),
   );
 
-  final did = await getOrCreateDid(storage);
-
+  final keyManager = SecureStorageKeyManager(storage);
+  final did = await getOrCreateDid(keyManager, storage);
   runApp(ProviderScope(
     overrides: [
       secureStorage.overrideWithValue(storage),
@@ -25,16 +26,17 @@ void main() async {
   ));
 }
 
-Future<String> getOrCreateDid(FlutterSecureStorage storage) async {
-  const didKey = 'did';
-  final did = await storage.read(key: didKey);
-  if (did != null) {
-    return did;
+Future<Did> getOrCreateDid(
+  KeyManager keyManager,
+  FlutterSecureStorage storage,
+) async {
+  const didUriKey = 'did.uri';
+  final didUri = await storage.read(key: didUriKey);
+  if (didUri != null) {
+    return DidJwk(uri: didUri, keyManager: keyManager);
   }
 
-  final keyManager = InMemoryKeyManager();
-  final jwt = await DidJwk.create(keyManager: keyManager);
-  await storage.write(key: didKey, value: jwt.uri);
-
-  return jwt.uri;
+  final did = await DidJwk.create(keyManager: keyManager);
+  await storage.write(key: didUriKey, value: did.uri);
+  return did;
 }

frontend/lib/services/secure_storage_key_manager.dart

@@ -0,0 +1,42 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:tbdex/tbdex.dart';
+
+class SecureStorageKeyManager implements KeyManager {
+  final FlutterSecureStorage _storage;
+  SecureStorageKeyManager(this._storage);
+
+  @override
+  Future<String> generatePrivateKey(DsaName alg) async {
+    final privateKeyJwk = await DsaAlgorithms.generatePrivateKey(alg);
+    final thumbprint = privateKeyJwk.computeThumbprint();
+    await _storage.write(key: thumbprint, value: privateKeyJwk.toString());
+    return thumbprint;
+  }
+
+  @override
+  Future<Jwk> getPublicKey(String keyAlias) async {
+    final privateKeyJwkStr = await _storage.read(key: keyAlias);
+
+    if (privateKeyJwkStr == null) {
+      throw Exception('No key found with alias $keyAlias');
+    }
+
+    final privateKeyJwk = Jwk.fromJson(json.decode(privateKeyJwkStr));
+    return DsaAlgorithms.computePublicKey(privateKeyJwk);
+  }
+
+  @override
+  Future<Uint8List> sign(String keyAlias, Uint8List payload) async {
+    final privateKeyJwkStr = await _storage.read(key: keyAlias);
+
+    if (privateKeyJwkStr == null) {
+      throw Exception('No key found with alias $keyAlias');
+    }
+
+    final privateKeyJwk = Jwk.fromJson(json.decode(privateKeyJwkStr));
+    return DsaAlgorithms.sign(privateKeyJwk, payload);
+  }
+}

frontend/pubspec.lock

@@ -9,6 +9,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.11.0"
+  base32:
+    dependency: transitive
+    description:
+      name: base32
+      sha256: ddad4ebfedf93d4500818ed8e61443b734ffe7cf8a45c668c9b34ef6adde02e2
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
   boolean_selector:
     dependency: transitive
     description:
@@ -41,6 +49,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.18.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
   crypto:
     dependency: transitive
     description:
@@ -82,10 +98,10 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_hooks
-      sha256: "7c8db779c2d1010aa7f9ea3fbefe8f86524fcb87b69e8b0af31e1a4b55422dec"
+      sha256: "09f64db63fee3b2ab8b9038a1346be7d8986977fae3fec601275bf32455ccfc0"
       url: "https://pub.dev"
     source: hosted
-    version: "0.20.3"
+    version: "0.20.4"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -301,6 +317,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.7"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      sha256: "7c1e5f0d23c9016c5bbd8b1473d0d3fb3fc851b876046039509e18e0c7485f2c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.7.3"
   riverpod:
     dependency: transitive
     description:
@@ -359,7 +383,7 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "7ba39caf5a950196abfe881a0ffee307aa79c2c2"
+      resolved-ref: "16e4c095efa420e770a0ee32663f1f52dcfce095"
       url: "https://github.com/TBD54566975/tbdex-dart.git"
     source: git
     version: "0.1.0"