fix: improve transfer recognition and local data safety

2026-07-26 21:36:46 +08:00
parent 7df25edd96
commit 882293343e
21 changed files with 505 additions and 128 deletions
@@ -0,0 +1,40 @@
+import 'dart:convert';
+
+import 'package:crypto/crypto.dart';
+
+class BackendIdentity {
+  BackendIdentity._();
+
+  static const internalBuild = bool.fromEnvironment('INTERNAL_BUILD');
+  static const configuredBaseUrl = String.fromEnvironment('API_BASE_URL');
+
+  static const String baseUrl = configuredBaseUrl != ''
+      ? configuredBaseUrl
+      : 'https://api.invalid';
+
+  static final String scope = scopeForBaseUrl(baseUrl);
+
+  static String accountNamespace(int userId) => 'account_${scope}_$userId';
+
+  static String scopeForBaseUrl(String value) => sha256
+      .convert(utf8.encode(_normalizedBaseUrl(value)))
+      .toString()
+      .substring(0, 16);
+
+  static String accountNamespaceFor(String baseUrl, int userId) =>
+      'account_${scopeForBaseUrl(baseUrl)}_$userId';
+
+  static String _normalizedBaseUrl(String value) {
+    final uri = Uri.tryParse(value.trim());
+    if (uri == null || !uri.hasScheme || uri.host.isEmpty) {
+      return value.trim().toLowerCase();
+    }
+    final path = uri.path == '/'
+        ? ''
+        : uri.path.replaceFirst(RegExp(r'/+$'), '');
+    return uri
+        .replace(path: path, query: null, fragment: null)
+        .toString()
+        .toLowerCase();
+  }
+}