TRON -> TRON_MAINNET

frontend/pshared/lib/service/payment/documents.dart

@@ -0,0 +1,44 @@
+import 'package:logging/logging.dart';
+
+import 'package:pshared/models/file/downloaded_file.dart';
+import 'package:pshared/service/authorization/service.dart';
+import 'package:pshared/service/services.dart';
+
+
+class PaymentDocumentsService {
+  static final _logger = Logger('service.payment_documents');
+  static const String _objectType = Services.payments;
+
+  static Future<DownloadedFile> getAct(String organizationRef, String paymentRef) async {
+    final encodedRef = Uri.encodeQueryComponent(paymentRef);
+    final url = '/documents/act/$organizationRef?payment_ref=$encodedRef';
+    _logger.fine('Downloading act document for payment $paymentRef');
+    final response = await AuthorizationService.getGETBinaryResponse(_objectType, url);
+    final filename = _filenameFromDisposition(response.header('content-disposition')) ??
+        'act_$paymentRef.pdf';
+    final mimeType = response.header('content-type') ?? 'application/pdf';
+    return DownloadedFile(
+      bytes: response.bytes,
+      filename: filename,
+      mimeType: mimeType,
+    );
+  }
+
+  static String? _filenameFromDisposition(String? disposition) {
+    if (disposition == null || disposition.isEmpty) return null;
+    final parts = disposition.split(';');
+    for (final part in parts) {
+      final trimmed = part.trim();
+      if (trimmed.toLowerCase().startsWith('filename=')) {
+        var value = trimmed.substring('filename='.length).trim();
+        if (value.startsWith('"') && value.endsWith('"') && value.length > 1) {
+          value = value.substring(1, value.length - 1);
+        }
+        if (value.isNotEmpty) {
+          return value;
+        }
+      }
+    }
+    return null;
+  }
+}