fix nwc uri parse with multiple individual relay parameters

Author: Fmar

packages/ndk/lib/domain_layer/usecases/nwc/nostr_wallet_connect_uri.dart

@@ -68,41 +68,35 @@ class NostrWalletConnectUri extends Equatable {
   factory NostrWalletConnectUri.parseConnectionUri(String uri) {
     Uri parsedUri = Uri.parse(uri);
 
-    String pubkey = parsedUri.host;// _extractPubkey(parsedUri.toString());
+    String pubkey = parsedUri.host; // _extractPubkey(parsedUri.toString());
     String? secret = parsedUri.queryParameters['secret'];
     String? lud16 = parsedUri.queryParameters['lud16'];
 
     if (pubkey.isEmpty || secret == null || parsedUri.scheme != 'nostr+walletconnect') {
-      throw Exception(
-          "Required fields (scheme, pubkey, secret) are missing or incorrect in the connection URI.");
+      throw Exception("Required fields (scheme, pubkey, secret) are missing or incorrect in the connection URI.");
     }
 
     // Parse relays - support both single relay and comma-separated relays
     List<String> relaysList = [];
 
     // Check for single relay parameter (backward compatibility)
-    String? singleRelay = parsedUri.queryParameters['relay'];
-    if (singleRelay != null) {
-      List<String> commaSeparatedRelays = singleRelay
-          .split(',')
-          .map((r) => r.trim())
-          .where((r) => r.isNotEmpty)
-          .toList();
-      for (String relay in commaSeparatedRelays) {
-        if (!relaysList.contains(relay)) {
-          relaysList.add(relay);
+    List<String>? relayParams = parsedUri.queryParametersAll['relay'];
+    if (relayParams != null) {
+      for (var relay in relayParams) {
+        List<String> commaSeparatedRelays = relay.split(',').map((r) => r.trim()).where((r) => r.isNotEmpty).toList();
+        for (String relay in commaSeparatedRelays) {
+          if (!relaysList.contains(relay)) {
+            relaysList.add(relay);
+          }
         }
       }
     }
 
     // Check for comma-separated relays in a single parameter
     String? relaysParam = parsedUri.queryParameters['relays'];
     if (relaysParam != null) {
-      List<String> commaSeparatedRelays = relaysParam
-          .split(',')
-          .map((r) => r.trim())
-          .where((r) => r.isNotEmpty)
-          .toList();
+      List<String> commaSeparatedRelays =
+          relaysParam.split(',').map((r) => r.trim()).where((r) => r.isNotEmpty).toList();
       for (String relay in commaSeparatedRelays) {
         if (!relaysList.contains(relay)) {
           relaysList.add(relay);

packages/ndk/test/usecases/nwc/nostr_wallet_connect_uri_test.dart

@@ -31,6 +31,21 @@ void main() {
           ]));
       expect(nostrUri.secret, equals('secret123'));
     });
+    test('should parse a connection URI with multiple individual relay parameters', () {
+      final uri =
+          'nostr+walletconnect://pubkey123?relay=wss://relay1.example.com&relay=wss://relay2.example.com&relay=wss://relay3.example.com&secret=secret123';
+      final nostrUri = NostrWalletConnectUri.parseConnectionUri(uri);
+
+      expect(nostrUri.walletPubkey, equals('pubkey123'));
+      expect(
+          nostrUri.relays,
+          equals([
+            'wss://relay1.example.com',
+            'wss://relay2.example.com',
+            'wss://relay3.example.com'
+          ]));
+      expect(nostrUri.secret, equals('secret123'));
+    });
 
     test('should parse a connection URI with mixed relay parameters', () {
       final uri =